Description:TECHNICAL FIELD

Present disclosure relates in general to a field of material science. Particularly, but not exclusively, the present disclosure relates to process for improving torsional strength and torsional ductility of eutectoid steel wire rods. Further embodiments of the disclosure a method for improving axial alignment of pearlite in the eutectoid steel wire rod, in such a way that, the breakage of the pearlite lamellae for further wire drawing is avoided.

BACKGROUND OF THE DISCLOSURE

Steel is an alloy of iron, carbon, and other elements such as Phosphorous (P), Sulphur (S), Nitrogen (N), Manganese (Mn), Silicon (Si), Chromium (Cr), etc. Because of its high tensile strength and low cost, steel may be considered as a major component in wide variety of applications. Some of the applications of the steel may include buildings, ships, tools, automobiles, machines, bridges, and numerous other applications. The steel obtained from steel making process may not possess all the desired properties. Therefore, the steel may be subjected to secondary processes such as heat treatment for controlling material properties and to tailor the microstructure to meet various needs in the intended applications.

Generally, heat treatment is carried out using techniques including but not limiting to annealing, normalising, hot rolling, quenching, tempering, thermo mechanical processing and the like. During heat treatment process, the material undergoes a sequence of heating and cooling operations, thus, the microstructures of the steel may be modified during such operations. As a result of heat treatment, the steel undergoes phase transformation, influencing mechanical properties like strength, ductility, toughness, hardness, toughness, drawability etc. The purpose of heat treatment is to increase service life of a product by improving its strength, hardness etc., or prepare the material for improved manufacturability.

Eutectoid steels have carbon composition of about 0.8 wt.% to about 2.0 wt.% and have a pearlite microstructure with ferrite and cementite alternative lamellae. Eutectoid steels are generally used for drawing of wires for use in various applications. In general Eutectoid steels have the pearlite structure, and such structure may be often considered as a nanocomposite, by having a hard carbide phase in a soft ferrite matrix. Eutectoid steel wires may have a high strength depending upon axial alignment of pearlite colonies and interlamellar spacing between the ferrite and the cementite phase.

Conventionally, many methods have been employed to improve the mechanical properties eutectoid of steel wires by engineering pearlite microstructure. One such method involves wire drawing technique. Eutectoid steel wire has been subjected to fine wire drawing in a hot or wet drawing machine. However, this method is not effective in improving the mechanical properties of eutectoid steel wires to a large extent. Wire drawing technique may create the heterogeneities in the microstructure. This condition may lead to the breakage of the pearlite lamellae, formation of ‘S’ type bands and large variation in pearlite inter-lamellar spacing. Owing heterogeneous final microstructure, the eutectoid steel wires may be prone to delaminated fracture with low shear strain to failure under real time operations.

Yet another conventional method to improve machinal properties of the eutectoid steel wire by improving pearlite colonies alignment may involve phase transformation under high magnetic field. A magnetic field of about 12 T has to be applied to the eutectoid steel wires during pearlite to austenite transformation at 733o C and austenite to pearlite phase transformation during cooling at 655o C. However, it would be difficult to achieve such a high magnetic field practically in industrial scale. Hence, method may not be adaptable for mass production in large steel heat treatment plants.

The present disclosure is directed to overcome one or more limitations stated above or any other limitation associated with the prior arts.

SUMMARY OF THE DISCLOSURE

One or more shortcomings of the prior art are overcome by a method as disclosed and additional advantages are provided through the method as described in the present disclosure. Additional features and advantages are realized through the techniques of the present disclosure. Other embodiments and aspects of the disclosure are described in detail herein and are considered a part of the claimed disclosure.

It is to be understood that the aspects and embodiments of the disclosure described above may be used in any combination with each other. Several of the aspects and embodiments may be combined to form a further embodiment of the disclosure.

In one non-limiting embodiment of the present disclosure, there is provided a method for improving axial alignment pearlite in a eutectoid steel wire rod. In the method, the eutectoid steel wire rod of a composition comprising: carbon (C) at about 0.8 wt.% to at about 0.85 wt.%, manganese (Mn) at about 0.5 wt.% to at about 0.55 wt.%, sulphur (S) up-to 0.010 wt.%, phosphorous (P) up-to 0.010 wt.%, silicon (Si) at about 0.18 wt.% to at about 0.20 wt.%, nitrogen (N) up-to 0.003 ppm, and the balance being Iron (Fe) optionally along with incidental elements is heated to a predetermined temperature. The eutectoid steel wire rod is then cooled to austenite-pearlite phase transformation temperature at a first predetermined rate. Further, a predetermined magnitude of external stress is applied along an axis of the eutectoid steel wire rod at the austenite-pearlite phase transformation temperature. Finally, the eutectoid steel wire rod is cooled at a second predetermined rate to a room temperature under application of the external stress along the axis.

In an embodiment, the predetermined temperature is about 1000 °C.

In an embodiment, the first predetermined rate is about 1 °C/second.

In an embodiment, the austenite-pearlite phase transformation temperature ranges from about 620 °C to about 680 °C.

In an embodiment, the magnitude of the external stress ranges from 10 MPa to about 150 MPa.

In an embodiment, the eutectoid steel wire rod exhibits the axial alignment of 35+3 to 67+5, and the alignment is calculated via:
A_f^20= (A_ ^20)/(A_ ^t )
A_f=Area fraction of the pearlite colonies within 20^o of wire axis
A_ ^20= Area of the pearlite colonies within 20^o of wire axis
A_ ^t= Total area of the pearlite colonies.
In an embodiment, the axial alignment of perlite is estimated as an area fraction of the pearlite colonies within angular distance of 20o with the axis of the eutectoid steel wire rod.

In another non-limiting embodiment, eutectoid steel wire rod is disclosed. The eutectoid steel wire includes a composition comprising: carbon (C) at about 0.8 wt.% to at about 0.85 wt.%, manganese (Mn) at about 0.5 wt.% to at about 0.55 wt.%, sulphur (S) up-to 0.010 wt.%, phosphorous (P) up-to 0.010 wt.%, silicon (Si) at about 0.18 wt.% to at about 0.20 wt.%, nitrogen (N) up-to 0.003 ppm, and the balance being Iron (Fe) optionally along with incidental elements. Further, the eutectoid steel wire rod exhibits a tensile strength of about 2 GPa, torsional strength of about 610 MPa and axial alignment of perlite up to 70%.

In an embodiment, the diameter of wire rod is 5.5 mm.

In an embodiment, the torsional ductility of the wire rod is 0.86.

In an embodiment, tensile strength to failure of the eutectoid steel wire rod ranges from 1387 MPa -1497 MPa, and the torsional strength to failure of the eutectoid steel wire rod is 398 MPa -596 MPa.

It is to be understood that the aspects and embodiments of the disclosure described above may be used in any combination with each other. Several of the aspects and embodiments may be combined to form a further embodiment of the disclosure.

The foregoing summary is illustrative only and is not intended to be in any way limiting. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features will become apparent by reference to the drawings and the following detailed description.

BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS

The novel features and characteristics of the disclosure are set forth in the appended description. The disclosure itself, however, as well as a preferred mode of use, further objectives, and advantages thereof, will best be understood by reference to the following detailed description of an illustrative embodiment when read in conjunction with the accompanying figures. One or more embodiments are now described, by way of example only, with reference to the accompanying figures wherein like reference numerals represent like elements and in which:

Figure 1 is a flow chart of a method for improving axial alignment pearlite in eutectoid steel wire rod, in accordance with an embodiment of the present disclosure.

Figure 2 illustrates a graphical representation of thermo-mechanical process to improve axial alignment pearlite of the eutectoid steel wire, according to an exemplary embodiment of the present disclosure.

Figure. 3 illustrates optical micrograph image of the eutectoid steel wire showing perlite alignment without undergoing the process of the present disclosure.

Figure. 4 illustrates optical micrograph image of the eutectoid steel wire showing perlite alignment after undergoing the process of the present disclosure.

The figures depict embodiments of the disclosure for purposes of illustration only. One skilled in the art will readily recognize from the following description that alternative embodiments of the methods illustrated herein may be employed without departing from the principles of the disclosure described herein.

DETAILED DESCRIPTION

The foregoing has broadly outlined the features and technical advantages of the present disclosure in order that the detailed description of the disclosure that follows may be better understood. Additional features and advantages of the disclosure will be described hereinafter which form the subject of the description of the disclosure. It should also be realized by those skilled in the art that such equivalent methods do not depart from the scope of the disclosure. The novel features which are believed to be characteristic of the disclosure, as to method of operation, together with further objects and advantages will be better understood from the following description when considered in connection with the accompanying figures. It is to be expressly understood, however, that each of the figures is provided for the purpose of illustration and description only and is not intended as a definition of the limits of the present disclosure.

In the present document, the word "exemplary" is used herein to mean "serving as an example, instance, or illustration." Any embodiment or implementation of the present subject matter described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments.

While the disclosure is susceptible to various modifications and alternative forms, specific embodiment thereof has been shown by way of example in the drawings and will be described in detail below. It should be understood, however that it is not intended to limit the disclosure to the particular forms disclosed, but on the contrary, the disclosure is to cover all modifications, equivalents, and alternative falling within the spirit and the scope of the disclosure.

The terms “comprises”, “comprising”, or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a method that comprises a list of acts does not include only those acts but may include other acts not expressly listed or inherent to such method. In other words, one or more acts in a method proceeded by “comprises… a” does not, without more constraints, preclude the existence of other acts or additional acts in the method.

Conventionally, methods such as wire drawing, magnetic field application have been tried to enhance mechanical properties of eutectoid steel wire rods. However, such conventional methods are not satisfactory in bringing anticipated improvement in the amount of axial alignment pearlite owing problems such as materials fracture, high cost processing etc. From the discussion of prior arts, it is evident that a simple, low cost method to increase axial alignment pearlite in eutectoid steel wire rod and thereby improve the mechanical properties is still a challenge. Herein, the present disclosure provides a method for improving axial alignment pearlite in a eutectoid steel wire rod.

The present disclosure provides a method for improving axial alignment pearlite in a eutectoid steel wire rod. In the method, as a first step the eutectoid steel wire rod of a composition comprising: carbon (C) at about 0.8 wt.% to at about 0.85 wt.%, manganese (Mn) at about 0.5 wt.% to at about 0.55 wt.%, sulphur (S) up-to 0.010 wt.%, phosphorous (P) up-to 0.010 wt.%, silicon (Si) at about 0.18 wt.% to at about 0.20 wt.%, nitrogen (N) up-to 0.003 ppm, and the balance being Iron (Fe) optionally along with incidental elements is heated to a predetermined temperature. The eutectoid steel wire rod to the eutectoid steel wire rod is then cooled to austenite-pearlite phase transformation temperature at a first predetermined rate. Further, a predetermined magnitude of external stress is applied along an axis of the eutectoid steel wire rod at the austenite-pearlite phase transformation temperature. Finally, the eutectoid steel wire rod is cooled at a second predetermined rate to a room temperature under application of the external stress and exbibits axial alignment of perlite up to 70%. The eutectoid steel wire rod with the pearlite axial alignment exhibits a tensile strength of about 2 GPa, a torsional ductility of up to 0.86 and torsional strength of about 398 MPa -596 MPa .

In the following detailed description of the embodiments of the disclosure, reference is made to the accompanying drawings that form a part hereof, and in which are shown by way of illustration specific embodiments in which the disclosure may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the disclosure, and it is to be understood that other embodiments may be utilized and that changes may be made without departing from the scope of the present disclosure. The following description is, therefore, not to be taken in a limiting sense.

In the present disclosure discloses a method for improving axial alignment pearlite in a eutectoid steel wire rod is explained with the help of figures. However, such exemplary embodiments should not be construed as limitations of the present disclosure since the method may be used for other types of steel objects other than wire rod or any wire rod other than the eutectoid steel. A person skilled in the art may envisage various such embodiments without deviating from scope of the present disclosure.

Figure 1 is a flow chart and Figure. 2 is a graphical representation of a method for improving axial alignment pearlite in a eutectoid steel wire rod. Referring to block [001], the eutectoid steel wire rod of a composition comprising: carbon (C) at about 0.8 wt.% to at about 0.85 wt.%, manganese (Mn) at about 0.5 wt.% to at about 0.55 wt.%, sulphur (S) up-to 0.010 wt.%, phosphorous (P) up-to 0.010 wt.%, silicon (Si) at about 0.18 wt.% to at about 0.20 wt.%, nitrogen (N) up-to 0.003 ppm, and the balance being Iron (Fe) optionally along with incidental elements may be heated to 1000 °C. This may be done to get homogenous distribution of alloying elements by dissolving precipitates.

The eutectoid wire rod may be later cooled to austenite-pearlite phase transformation temperature 620 °C to about 680 °C at a cooling rate of 1 °C/second as shown in block [102]. Austenite-pearlite phase transformation temperature is a temperature in which the austenite transforms into pearlite having ferrite and cementite lamellar morphology with a ratio of 7:1 in thickness. Usually, pearlite colonies may be randomly oriented to order to minimise the internal free energy and hence lower mechanical properties may be expected.

Further, a magnitude of 10 MPa to 150 MPa external stress may be applied along an axis of the eutectoid steel wire rod at the austenite-pearlite phase transformation temperature as shown in block [103]. The external stress an axial tensile stress applied by suitable means. The eutectoid steel wire rod under application of the external stress of 10 MPa to 150 MPa may be finally cooled to room temperature at a cooling rate of at a cooling rate of 1 °C/second as shown in block [104]. The application of external stress along the wire axis may force the randomly oriented pearlite colonies to get aligned with respect to wire axis and thus improves the axial alignment pearlite without damaging ferrite-cementite lamellae. By employing the method as disclosed in present disclosure, the eutectoid steel wire rod exbibits axial alignment of perlite up to 70%.

Following paragraphs now enumerates examples of eutectoid steel wire rod with improved axial alignment pearlite by a method of the present disclosure:

EXAMPLES

In an exemplary embodiment, the eutectoid steel wire rod having a diameter ranges from about 5 mm to about 8 mm, preferably 5.5 mm is considered for experimental study, and subjected to to thermo-mechanical processing as shown in figure 2. The eutectoid steel wire rod has a composition comprising: carbon (C) at about 0.8 wt.% to at about 0.85 wt.%, manganese (Mn) at about 0.5 wt.% to at about 0.55 wt.%, sulphur (S) up-to 0.010 wt.%, phosphorous (P) up-to 0.010 wt.%, silicon (Si) at about 0.18 wt.% to at about 0.20 wt.%, nitrogen (N) up-to 0.003 ppm, and the balance being Iron (Fe) optionally along with incidental elements. The wire rod with above mentioned composition may be produced by industrial rolling of billets. During the thermo-mechanical processing, the eutectoid steel wire rod may be heated to 1000 °C in order to obtain a homogenous composition. Later, controlled cooling steps may be performed. As an example, controlled cooling is performed in a TA-BAHRTM dilatometer (model DIL 850-D/A). The heated eutectoid steel wire rod may be cooled to austenite-pearlite phase transformation temperature ranging from about 620 °C to about 680 °C at a cooling a rate of 1 °C/second. At the austenite-pearlite phase transformation temperature, external stress of magnitude ranges from 10 MPa to 150 MPa may be applied to eutectoid steel wire rod along a wire axis. The external stress tensile stress. A deformation simulator (GleebleTM-3800) may be used for producing constant stress of required magnitude. The stress at an interval of 10 MPa may be applied along the wire axis through appropriate servo-hydraulic actuators deformation simulator. Finally, the eutectoid steel wire rod under application of the external stress may be cooled to room temperature at a cooling rate of at a cooling rate of 1 °C/second. The pearlite axial alignment may be estimated as the area fraction of the pearlite colonies making an angle with the wire axis. This may be obtained by pinning the pearlite area at regular interval of angular distance and dividing the obtained value by total pearlite area. The area fraction of the pearlite colonies within angular distance of 20 degrees with the wire axis has been taken as a parameter for the pearlite axial alignment.

In an embodiment, the axial alignment of perlite is determined by the below equation:

A_f^20= (A_ ^20)/(A_ ^t )

A_f=Area fraction of the pearlite colonies within 20^o of wire axis

A_ ^20= Area of the pearlite colonies within 20^o of wire axis

A_ ^t= Total area of the pearlite colonies.

S. No Austenitizing temperature (oC) Cooling Rate (oC/s) Stress Applied Temperature (oC) Stress
Applied (MPa) Initial Alignment Final Alignment Tensile strength to failure (MPa) Torsional strength to failure (MPa) Shear strain to failure
1 1000 1 655 0 27±6 31±4 1370 398 0.23±0.021
2 1000 1 655 10 29±7 35±3 1387 410 0.3±0.020
3 1000 1 655 20 30±5 39±5 1392 465 0.42±0.019
4 1000 1 655 30 28±6 43±4 1420 513 0.55±0.036
5 1000 1 655 40 32±6 46±5 1436 548 0.63±0.027
6 1000 1 655 50 29±5 51±6 1451 564 0.72±0.038
7 1000 1 655 60 33±4 56±4 1472 588 0.78±0.047
8 1000 1 655 70 32±6 67±5 1497 596 0.86±0.039

Table-1

Table 1 indicates the paraments employed for the thermo-mechanical processing, amount of axial alignment pearlite and shear strain to failure, tensile and torsional strength of eutectoid steel wire rod processed by the method of the present disclosure.

Initially, when the externally stress of magnitude 0 MPa is applied (no stress state), eutectoid steel wire rod has random pearlite orientation with only 27±6 % of pearlite aligned within 20 degrees with the wire axis. As the magnitude of the external stress is increased, there is a great improvement in the axial alignment of pearlite with the wire axis. When the external stress of 70 MPa is applied, maximum axial alignment of 67±5 % is obtained. The increased external stress may force pearlite colonies from random state to align with respect with wire axis. As the magnitude of external stress has been increased, shear strain to failure also may be decreased indicating improved mechanical properties. Further, along with improved axial alignment of pearlite, the increased magnitude of external stress may also reduce interlamellar spacing of ferrite-cementite leading to enhance the mechanical propertied (similar to grain refinement by Hall-Petch effect). The eutectoid steel wire rod with the pearlite axial alignment exhibits a tensile strength of about 1370MPa to 1497 MPa.

The standard torsion tests (ASTM A938) for eutectoid steel wire rod may be performed in an InstronTM torsion tester (model MT2) at one rotation per minute. The eutectoid steel wire rod with the pearlite axial alignment exhibits a torsional ductility of up to 0.86 and torsional strength of about 398 MPa -596 MPa.

Now referring to Figures. 3 and 4 showing optical micrograph of microstructure of the eutectoid steel wire rod which is not subject to the process of present disclosure and the one which is subjected to the process of the present disclosure. As evident from the Figure.3, the eutectoid steel wire rod with no external stress during austenite-pearlite phase transformation has very less percentage of alignment of perlite i.e. 31%. Whereas, the eutectoid steel wire rod which is processed by the method of present disclosure by inducing external stress during austenite-pearlite phase transformation there us promising increase in the axial alignment of the perlite, and for example, the alignment has increases to 67%.

In an embodiment, eutectoid steel wire rod may have improved axial alignment pearlite up to 70%. The present disclosure may be thus successful in providing a simple, economic, and efficient method for improving axial alignment pearlite in a eutectoid steel wire rod.

Equivalents:

With respect to the use of substantially any plural and/or singular terms herein, those having skill in the art can translate from the plural to the singular and/or from the singular to the plural as is appropriate to the context and/or application. The various singular/plural permutations may be expressly set forth herein for sake of clarity.

It will be understood by those within the art that, in general, terms used herein, and especially in the appended claims (e.g., bodies of the appended claims) are generally intended as "open" terms (e.g., the term "including" should be interpreted as "including but not limited to," the term "having" should be interpreted as "having at least," the term "includes" should be interpreted as "includes but is not limited to," etc.). It will be further understood by those within the art that if a specific number of an introduced claim recitation is intended, such an intent will be explicitly recited in the claim, and in the absence of such recitation no such intent is present. For example, as an aid to understanding, the following appended claims may contain usage of the introductory phrases "at least one" and "one or more" to introduce claim recitations. However, the use of such phrases should not be construed to imply that the introduction of a claim recitation by the indefinite articles "a" or "an" limits any particular claim containing such introduced claim recitation to inventions containing only one such recitation, even when the same claim includes the introductory phrases "one or more" or "at least one" and indefinite articles such as "a" or "an" (e.g., "a" and/or "an" should typically be interpreted to mean "at least one" or "one or more"); the same holds true for the use of definite articles used to introduce claim recitations. In addition, even if a specific number of an introduced claim recitation is explicitly recited, those skilled in the art will recognize that such recitation should typically be interpreted to mean at least the recited number (e.g., the bare recitation of "two recitations," without other modifiers, typically means at least two recitations, or two or more recitations). Furthermore, in those instances where a convention analogous to "at least one of A, B, and C, etc." is used, in general such a construction is intended in the sense one having skill in the art would understand the convention (e.g., "a system having at least one of A, B, and C" would include but not be limited to systems that have A alone, B alone, C alone, A and B together, A and C together, B and C together, and/or A, B, and C together, etc.). In those instances where a convention analogous to "at least one of A, B, or C, etc." is used, in general such a construction is intended in the sense one having skill in the art would understand the convention (e.g., "a system having at least one of A, B, or C" would include but not be limited to systems that have A alone, B alone, C alone, A and B together, A and C together, B and C together, and/or A, B, and C together, etc.). It will be further understood by those within the art that virtually any disjunctive word and/or phrase presenting two or more alternative terms, whether in the description, claims, or drawings, should be understood to contemplate the possibilities of including one of the terms, either of the terms, or both terms. For example, the phrase "A or B" will be understood to include the possibilities of "A" or "B" or "A and B."

While various aspects and embodiments have been disclosed herein, other aspects and embodiments will be apparent to those skilled in the art. The various aspects and embodiments disclosed herein are for purposes of illustration and are not intended to be limiting, with the true scope and spirit being indicated by the following claims.

Referral Numerals

Referral Numerals Description
101-104 Flowchart blocks for method for improving axial alignment pearlite in a eutectoid steel wire rod
101 Heating
102 Cooling
103 Applying external stress
104 Cooling under the external stress

Claims:

A method for improving axial alignment of pearlite in eutectoid steel wire rod, the method comprising:
heating, the eutectoid steel wire rod of a composition comprising: carbon (C) at about 0.8 wt.% to at about 0.85 wt.%, manganese (Mn) at about 0.5 wt.% to at about 0.55 wt.%, sulphur (S) up-to 0.010 wt.%, phosphorous (P) up-to 0.010 wt.%, silicon (Si) at about 0.18 wt.% to at about 0.20 wt.%, nitrogen (N) up-to 0.003 ppm, and the balance being Iron (Fe) optionally along with incidental elements, to a predetermined temperature;
cooling, the eutectoid steel wire rod to austenite-pearlite phase transformation temperature at a first predetermined cooling rate;
applying, a predetermined magnitude of external stress along an axis of the eutectoid steel wire rod at the austenite-pearlite phase transformation temperature; and
cooling, the eutectoid steel wire rod at a second predetermined cooling rate to a room temperature under the application of the external stress along the axis.

The method as claimed in claim 1, wherein the predetermined temperature is about 1000 °C.

The method as claimed in claim 1, wherein the first predetermined cooling rate is about 1 °C/second.

The method as claimed in claim 1, wherein the austenite-pearlite phase transformation temperature ranges from about 620 °C to about 680 °C.

The method as claimed in claim 1, wherein the magnitude of the external stress ranges from 10 MPa to about 150 MPa.

The method as claimed in claim 1, wherein the external stress is a tensile stress. .

The method as claimed in claim 1, wherein the second cooling predetermined rate is about 1 °C/second.

The method as claimed in claim 1, wherein eutectoid steel wire rod exhibits the axial alignment of 35+3 to 67+5.

The method as claimed in claim 8, wherein the alignment is calculated via A_f^20= (A_ ^20)/(A_ ^t )
A_f=Area fraction of the pearlite colonies within 20^o of wire axis
A_ ^20= Area of the pearlite colonies within 20^o of wire axis
A_ ^t= Total area of the pearlite colonies.

The method as claimed in claim 1, wherein the axial alignment of perlite is estimated as an area fraction of the pearlite colonies within angular distance of 20o with the axis of the eutectoid steel wire rod.

Eutectoid steel wire rod, comprising:
a composition comprising: carbon (C) at about 0.8 wt.% to at about 0.85 wt.%, manganese (Mn) at about 0.5 wt.% to at about 0.55 wt.%, sulphur (S) up-to 0.010 wt.%, phosphorous (P) up-to 0.010 wt.%, silicon (Si) at about 0.18 wt.% to at about 0.20 wt.%, nitrogen (N) up-to 0.003 ppm, and the balance being Iron (Fe) optionally along with incidental elements;
wherein, the eutectoid steel wire rod exhibits:
a tensile strength of about 2 GPa,
torsional strength of about 610 MPa and
axial alignment of perlite up to 70%.

The eutectoid steel wire rod as claimed in claim 11, wherein the eutectoid steel wire rod exhibits an axial alignment of 35+3 to 67+5.

The eutectoid steel wire rod as claimed in claim 11, wherein the axial alignment is calculated via A_f^20= (A_ ^20)/(A_ ^t )
A_f=Area fraction of the pearlite colonies within 20^o of wire axis
A_ ^20= Area of the pearlite colonies within 20^o of wire axis
A_ ^t= Total area of the pearlite colonies.
The eutectoid steel wire rod as claimed in claim 11, wherein the diameter of wire rod is 5.5 mm.

The eutectoid steel wire rod as claimed in claim 11, wherein the torsional ductility of the wire rod is 0.86.

The eutectoid steel wire rod as claimed in claim 11, wherein tensile strength to failure of the eutectoid steel wire rod ranges from 1387 MPa -1497 MPa.

The eutectoid steel wire rod as claimed in claim 11, wherein Torsional strength to failure of the eutectoid steel wire rod is 398 MPa -596 MPa.