摘要
首次采用重铬酸盐方法（简称ＤＣＲ法）进行不锈钢的激光表面预处理，结果表明：ＤＣＲ法具有处理效果稳定，不造成基材污染，能显著提高工件表面对激光能量的吸收率等优点，是一种适用于不锈钢的理想的预处理方法。对激光熔池中出现的组织结构及其形成原因进行了分析。
Laser surface remelting and solidification, as one of the advanced surface modification methods, is being widely used in industry. However, most machined workpieces are bright, which causes most of the laser energy reflect away from the surface. So a kind of surface pretreatment(or blacking treatment) must be done in order to increase the energy absorptivity. Nowadays, some pretreatment methods, such as electroplating, phosphating, brushing or spraying black coating materials, have been used for cast iron, mild steels, etc. However, for stainless steel, there is no ideal pretreatment method up to now. A new pretreatment method for the stainless steel has been developed by the authors. The method is to put the workpieces into the dichromic (DCR) salt melt and to keep there a certain time. The experimental results show that the DCR method can greatly improve the absorptivity of the workpieces and do not contaminate it. Furthermore, the method is handy and inexpensive. It is proved that DCR is an ideal pretreatment method for stainless steels.
出处
《西北工业大学学报》
EI
CAS
CSCD
北大核心
1997年第4期653-657,共5页
Journal of Northwestern Polytechnical University
基金
中国工程物理研究院院外基金
国家自然科学基金
