T8钢表面激光熔覆钴基硬面合金层的相组织与性能的研究

应用科学学报 ›› 1998, Vol. 16 ›› Issue (3): 360-365.

T8钢表面激光熔覆钴基硬面合金层的相组织与性能的研究

陈大明, 张恒华

上海大学

收稿日期:1997-03-06 修回日期:1997-06-28 出版日期:1998-09-30 发布日期:1998-09-30
作者简介:陈大明:硕士,讲师,上海大学材料学院材料系,上海 201800

Study on the Properties and Phase Constitution of Cobalt Base Alloy Layer Cladded by Laser on the Carbon Steel Surface

CHEN DAMING, ZHANG HENGHUA

School of Materials Science & Engineering, Shanghai University, Shanghai 201800

Received:1997-03-06 Revised:1997-06-28 Online:1998-09-30 Published:1998-09-30

摘要/Abstract

摘要： 应用横流式连续CO₂激光器,采用不同的激光工艺参数在T8钢表面上熔覆钴基硬面合金,然后用X射线衍射法、电解萃取法、比色法、耐磨试验及理论计算等研究了合金层的组织结构及性能.研究表明:激光熔覆的钴基硬面合金层,其显微硬度提高主要由r (CoCr)基体相的过饱和度所贡献,而耐磨性能提高主要是M₇C₃碳化物析出量增加起了更大的作用.

关键词: 钴基硬面合金, 相组织, 激光熔覆

Abstract: Cobalt -base alloy layer was cladded on the T8 carbon steel surface by cross-flow-type CO₂ laser with different parameters; the phase constitution, carbide content and chemical composition, microhardness and wear resistance of the alloy layer have been determined by X-ray diffraction, electrolytic extraction, comparison colorimeter and microhardness tester etc. and the saturation of matrix alloy was calculated from lattice constant. It can be concluded that the saturation of r-(CoCr) matrix makes important contribution to the hardness and the wear resistance of the alloy layer, however, is improved greatly due to the M₇C₃ carbide content.

Key words: laser cladding, cobalt-base hardfacing alloy, phase constitution

陈大明, 张恒华. T8钢表面激光熔覆钴基硬面合金层的相组织与性能的研究[J]. 应用科学学报, 1998, 16(3): 360-365.

CHEN DAMING, ZHANG HENGHUA. Study on the Properties and Phase Constitution of Cobalt Base Alloy Layer Cladded by Laser on the Carbon Steel Surface[J]. Journal of Applied Sciences, 1998, 16(3): 360-365.