Laser beam welding hard metals to steel

被引：30

作者：

Costa, AP

Quintino, L

Greitmann, M

机构：

[1] Univ Tecn Lisboa, Inst Super Tecn, P-1049001 Lisbon, Portugal

[2] Univ Stuttgart, State Mat Testing Inst, MPA, D-7000 Stuttgart, Germany

来源：

JOURNAL OF MATERIALS PROCESSING TECHNOLOGY | 2003年 / 141卷 / 02期

关键词：

laser welding; parameters; hard metals; microstructure;

D O I：

10.1016/S0924-0136(02)00954-8

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Laser beam weldability of hard metals to steel was examined with high power (cw) CO2 laser, (cw) Nd:YAG laser and (pw) Nd:YAG laser. Steel/hard metal joints, with 2.5 mm thickness, welded by the three laser systems, for comparison, will be presented. Two different hard metals compositions (K10 and K40) were examined. Power (P), speed (s) and vertical focal point position (f.p.p.) were investigated. To reduce the problem of porosity and crack formation in the hard metal, the parameter, t(w), horizontal distance from the beam to the joint was also investigated. Weld bead size, microstructure, bending tests and hardness were evaluated. (C) 2002 Elsevier B.V. All rights reserved.

引用

页码：163 / 173

页数：11