Double pulse laser welding of 6082 aluminium alloys

被引：12

作者：

von Witzendorff, P. ^{[1
]}

Hermsdorf, J. ^{[1
]}

Kaierle, S. ^{[1
]}

Suttmann, O. ^{[1
]}

Overmeyer, L. ^{[1
]}

机构：

[1] Laser Zentrum Hannover eV, D-30419 Hannover, Germany

来源：

SCIENCE AND TECHNOLOGY OF WELDING AND JOINING | 2015年 / 20卷 / 01期

关键词：

Pulsed laser welding; Double pulses; Aluminium; Hot cracking;

D O I：

10.1179/1362171814Y.0000000255

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Double pulse laser welding is investigated to reduce hot cracking in 6082 aluminium alloy welds. Therefore, Nd:YAG and diode laser pulses are superimposed and synchronised with a specific delay. The diode laser heats the parent metal and weld metal during weld spot solidification to compensate for solidification shrinkage and thermal contraction. The results of conventional pulsed laser welding prove that hot cracking is strongly dependent on the pulse peak power of the Nd:YAG laser, which constrains the crack free penetration depth. Adding the diode laser pulse at a defined time during weld spot solidification eliminated hot cracking. The double pulse welding method allowed the butt welding of 0.5 mm thick 6082 aluminium alloys without the formation of hot cracking.

引用

页码：42 / 47

页数：6

共 20 条

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