摘要
<正> 一 引言 激光表面合金化是一种局部表面变质处理的新方法,用真空蒸镀、电镀、涂敷粉末或薄膜在金属材料的工件表面上,然后用激光束把其表面熔化并控制在要求的深度,使表面产生厚度为10~1000μm的熔化层,合金元素将扩散进入工件表面的液态薄层,在凝固时熔化层获得的冷却速度可达10~4~10~6℃/s,相当于急冷淬火技术所能达到的冷却速度,故在短时间(一般为0.1~10s)内就可以就地生成一层所希望的一定深度的新的合金层,这种合金层与基体之间的结合力很强,属于冶金结合。 本文用高功率CO_2激光束对60号钢进行了表面C-N-B合金化,并对合金层进行了显微组织观察和X射线物相分析。
The element distribution, the phase structure and the microstructure morphology of C-N-B laser-alloyed layer on 60# steel surface were studied by employing the Auger electrom spectrometer, X-ray diffraetometer and the scanning electron microscope. The results show that the laser alloying of C-N-B surface will give rise to many strengthening effects on the base metal, and the fine metallurgical bonding has been achieved on the surface layer with the substrate. The relation between the properties of alloyed layer and the scanning speed have been discussed.
出处
《中国激光》
EI
CAS
CSCD
北大核心
1990年第1期56-60,共5页
Chinese Journal of Lasers