High power diode laser welding of metal catalytic converters

被引：1

作者：

Salminen, A ^{[1
]}

Lylykangas, R ^{[1
]}

Tuomola, H ^{[1
]}

机构：

[1] Lappeenranta Univ Technol, Laser Proc Lab, FIN-53850 Lappeenranta, Finland

来源：

FIRST INTERNATIONAL SYMPOSIUM ON HIGH-POWER LASER MACROPROCESSING | 2003年 / 4831卷

关键词：

laser welding; catalytic converters; high power diode laser;

D O I：

10.1117/12.503144

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The requirements set for modem car exhaust purity is ever higher due to this the design of environmetally friendlier car is ever more difficult. The metallic catalytic converter consists of catalytic metal core and outer tube. It has advantages over to the ceramic convertes by the flexibility of the converter design, but suffers from the higher manufacturing cost. This study concentrates on the development of joint between the catalytic core of the converter and the outer tube stucture. A comparative study was performed between CO2-, Nd:YAG- and HPDL laser welding in respect of productivity, investment and weld quality. The results reached with each laser were of higher quality than arc welding. However the heat conduction limited welding turned out to be more suitable for welding this application than the keyhole welding mode. With diode laser welding the joining can be performed with the heat conduction mode welding. An analysis of advantages and restrictions was performed for each welding process.

引用

页码：32 / 37

页数：6