Butt Welded Joint Of Steel Material And Method For Manufacturing Same

Abstract: [Problem] To provide a butt welded joint of steel materials that has excellent fatigue strength, and a method for manufacturing this butt welded joint. [Solution] A butt welded joint of steel materials wherein: a pair of steel materials abutted to each other are set as base materials 2, 2, and a welded portion 3 straddles these base materials; the carbon concentration of the base materials is 0.1 mass% to 0.35 mass%; the welded portion is formed by carrying out a first heating using keyhole welding and then reheating using heat transfer welding; the welded portion has a melt-solidified portion 3d in which the base materials are melted/solidified by the keyhole welding, a solidification-reheated portion 4 in which the melt-solidified portion is reheated by heat transfer welding, thereby changing the structure of the melt-solidified portion, and a re-melted-solidified portion 5 in which the melt-solidified portion is re-melted/re-solidified by reheating; and the width W0 and depth d0 of the melt-solidified portion and the width W1 and depth d1 of the re-melted-solidified portion 5 have the relationships 0.46W0 = W1 and 0.14d0 = d1 = 0.73d0.

Patent Information

Application #

Filing Date

19 January 2021

Publication Number

05/2021

Publication Type

INA

Invention Field

MECHANICAL ENGINEERING

Status

Email

patent@depenning.com

Parent Application

Patent Number

Legal Status

Grant Date

2024-01-19

Renewal Date

Applicants

SMC CORPORATION

14-1, Sotokanda 4-chome, Chiyoda-ku, Tokyo 1010021

Inventors

1. OKUHIRA Hiroyuki

c/o SMC CORPORATION TSUKUBA TECHNICAL CENTER, 4-2-2, Kinunodai, Tsukubamirai-shi, Ibaraki 3002436

2. ISHIKAWA Rikiya

c/o SMC CORPORATION TSUKUBA TECHNICAL CENTER, 4-2-2, Kinunodai, Tsukubamirai-shi, Ibaraki 3002436

3. TADANO Takuya

c/o SMC CORPORATION TSUKUBA TECHNICAL CENTER, 4-2-2, Kinunodai, Tsukubamirai-shi, Ibaraki 3002436

Specification

Documents

Application Documents

#	Name	Date
1	202147002384-STATEMENT OF UNDERTAKING (FORM 3) [19-01-2021(online)].pdf	2021-01-19
2	202147002384-PROOF OF RIGHT [19-01-2021(online)].pdf	2021-01-19
3	202147002384-PRIORITY DOCUMENTS [19-01-2021(online)].pdf	2021-01-19
4	202147002384-FORM 1 [19-01-2021(online)].pdf	2021-01-19
5	202147002384-DRAWINGS [19-01-2021(online)].pdf	2021-01-19
6	202147002384-DECLARATION OF INVENTORSHIP (FORM 5) [19-01-2021(online)].pdf	2021-01-19
7	202147002384-COMPLETE SPECIFICATION [19-01-2021(online)].pdf	2021-01-19
8	202147002384-FORM-26 [18-02-2021(online)].pdf	2021-02-18
9	202147002384-FORM 3 [22-06-2021(online)].pdf	2021-06-22
10	202147002384.pdf	2021-10-18
11	202147002384-Correspondence, Form-1 And POA_23-02-2022.pd.pdf	2022-02-23
12	202147002384-RELEVANT DOCUMENTS [24-05-2022(online)].pdf	2022-05-24
13	202147002384-MARKED COPIES OF AMENDEMENTS [24-05-2022(online)].pdf	2022-05-24
14	202147002384-FORM 18 [24-05-2022(online)].pdf	2022-05-24
15	202147002384-FORM 13 [24-05-2022(online)].pdf	2022-05-24
16	202147002384-AMMENDED DOCUMENTS [24-05-2022(online)].pdf	2022-05-24
17	202147002384-FER.pdf	2022-07-08
18	202147002384-OTHERS [02-01-2023(online)].pdf	2023-01-02
19	202147002384-FORM 3 [02-01-2023(online)].pdf	2023-01-02
20	202147002384-FER_SER_REPLY [02-01-2023(online)].pdf	2023-01-02
21	202147002384-DRAWING [02-01-2023(online)].pdf	2023-01-02
22	202147002384-COMPLETE SPECIFICATION [02-01-2023(online)].pdf	2023-01-02
23	202147002384-CLAIMS [02-01-2023(online)].pdf	2023-01-02
24	202147002384-PatentCertificate19-01-2024.pdf	2024-01-19
25	202147002384-IntimationOfGrant19-01-2024.pdf	2024-01-19

Search Strategy

1	202147002384E_07-07-2022.pdf