LASER WELDED JOINT, AUTOMOTIVE PART, METHOD FOR PRODUCING LASER WELDED JOINT, AND METHOD FOR MANUFACTURING AUTOMOTIVE PART

Title:

LASER WELDED JOINT, AUTOMOTIVE PART, METHOD FOR PRODUCING LASER WELDED JOINT, AND METHOD FOR MANUFACTURING AUTOMOTIVE PART

Document Type and Number:

WIPO Patent Application WO/2016/080488

Kind Code:

A1

Abstract:

This laser welded joint is a laser welded joint having welding metals provided between a plurality of steel sheets, wherein the welding metals have a chemical composition of predetermined components, the average hardness of the welding metals is 350-540 in Vickers hardness, the distribution density of porosities having diameters of 2-50 µm in the welding metals is 5.0 pieces/mm2 or less, and the distribution density of oxide inclusions having diameters of 3 µm or more in the welding metals is 0.1-8.0 pieces/mm2.

Inventors:

MARUYAMA NAOKI (JP)
NAITO YASUAKI (JP)
YONEMURA SHIGERU (JP)
MIYAZAKI YASUNOBU (JP)
KUWAYAMA TAKUYA (JP)

Application Number:

PCT/JP2015/082553

Publication Date:

May 26, 2016

Filing Date:

November 19, 2015

Export Citation:

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Assignee:

NIPPON STEEL & SUMITOMO METAL CORP (JP)

International Classes:

C22C38/00; B23K26/21; B23K26/322; C21D9/50; C22C38/58

Foreign References:

JPH10146686A	1998-06-02
JPH11293398A	1999-10-26
JPH11343538A	1999-12-14
JP2012115840A	2012-06-21
JP2000109946A	2000-04-18

Other References: