Method For Manufacturing High Chromium (Cr) Molten Steel, Method For

Method For Manufacturing High Chromium (Cr) Molten Steel, Method For Manufacturing Cast Piece, And Method For Manufacturing Press Roll

Abstract: An embodiment of the present invention relates to a method for manufacturing high-chromium (Cr) molten steel having a chromium (Cr) content of 4.5 wt% to 5.5 wt%, and the method may comprise the operations of: inserting molten steel into a steel converter used in the process of manufacturing stainless steel; and inputting chromium (Cr)-containing chromium steel alloy into the steel converter such that the content of chromium (Cr) in the molten steel reaches 4.5 wt% to 5.5 wt%. Therefore, according to the embodiments of the present invention, high-chromium (Cr) molten steel can be manufactured by using a steel converter that is used in the steelmaking process of other steel types, without contaminating same. In addition, when raising the temperature of high-chromium (Cr) molten steel or performing degassing to discharge gas, the present invention enables efficiently increasing the temperature of the molten steel and improves degassing efficiency.

Patent Information

Application #

Filing Date

25 March 2025

Publication Number

22/2025

Publication Type

INA

Invention Field

METALLURGY

Status

Email

Parent Application

Applicants

POSCO CO., LTD

(Goedong-dong), 6261, Donghaean-ro, Nam-gu, Pohang-si, Gyeongsangbuk-do 37859

Inventors

1. CHUNG, Tae In

101-1901, 33, Yangdeok-ro 50beon-gil, Buk-gu, Pohang-si, Gyeongsangbuk-do 37591

2. PARK, Cheol Min

106-1706, 11, Sangdonam-ro, Nam-gu, Pohang-si, Gyeongsangbuk-do 37834

3. CHO, Un Kwan

107-302, 43, Hanbit-gil 20beon-gil, Gyeongju-si, Gyeongsangbuk-do 38133

4. JEONG, Chang Ki

204-1803, 17, Hyoseong-ro 63beon-gil, Nam-gu, Pohang-si, Gyeongsangbuk-do 37836

5. YOON, Soon Kwan

1106, 45, Yugang-gil 10beon-gil, Yeonil-eup, Nam-gu, Pohang-si, Gyeongsangbuk-do 37655

6. LEE, Joo Dong

113-2202, 306, Saecheonnyeon-daero, Nam-gu, Pohang-si, Gyeongsangbuk-do 37837

Specification

Documents

Application Documents

#	Name	Date
1	202517027904-TRANSLATIOIN OF PRIOIRTY DOCUMENTS ETC. [25-03-2025(online)].pdf	2025-03-25
2	202517027904-STATEMENT OF UNDERTAKING (FORM 3) [25-03-2025(online)].pdf	2025-03-25
3	202517027904-REQUEST FOR EXAMINATION (FORM-18) [25-03-2025(online)].pdf	2025-03-25
4	202517027904-PROOF OF RIGHT [25-03-2025(online)].pdf	2025-03-25
5	202517027904-PRIORITY DOCUMENTS [25-03-2025(online)].pdf	2025-03-25
6	202517027904-FORM 18 [25-03-2025(online)].pdf	2025-03-25
7	202517027904-FORM 1 [25-03-2025(online)].pdf	2025-03-25
8	202517027904-DRAWINGS [25-03-2025(online)].pdf	2025-03-25
9	202517027904-DECLARATION OF INVENTORSHIP (FORM 5) [25-03-2025(online)].pdf	2025-03-25
10	202517027904-COMPLETE SPECIFICATION [25-03-2025(online)].pdf	2025-03-25
11	202517027904-FORM-5 [26-03-2025(online)].pdf	2025-03-26
12	202517027904-FORM-26 [12-05-2025(online)].pdf	2025-05-12
13	202517027904-FORM 3 [13-05-2025(online)].pdf	2025-05-13