Shielding gas influences on laser weldability of tailored blanks of advanced automotive steels

被引：35

作者：

Reisgen, Uwe ^{[1
]}

Schleser, Markus ^{[1
]}

Mokrov, Oleg ^{[1
]}

Ahmed, Essam ^{[1
]}

机构：

[1] Rhein Westfal TH Aachen, Welding & Joining Inst, Aachen, Germany

来源：

APPLIED SURFACE SCIENCE | 2010年 / 257卷 / 05期

关键词：

Tailor blanks; Laser welding; Shielding gas; Plasma; WELDED BLANKS; PENETRATION; PLASMA; BEAM;

D O I：

10.1016/j.apsusc.2010.08.042

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The effects of shielding gas types and flow rates on CO(2) laser weldability of DP600/TRIP700 steel sheets were studied in this work. The evaluated shielding gases were helium (He), argon (Ar) and different mixtures of He and Ar. Weld penetration, tensile strength and formability (Erichsen test) of laser welds were found to be strongly dependent upon the shielding gas types. The ability of shielding gas in removing plasma plume and thus increasing weld penetration is believed to be closely related to ionization potential and atomic weight which determine the period of plasma formation and disappearance. It was found that the higher helium shielding gas flow rate, the deeper weld penetration and the lower weld width. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：1401 / 1406

页数：6

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