灰口铸铁的激光表面熔凝硬化  

Laser Melt Hardening of Gray Cast Iron

作　　者：李刚[1] 王存山[1] 夏元良[1] 王彦芳[1] 董闯[1] 

机构地区：[1]大连理工大学三束材料改性国家重点实验室,辽宁大连116023

出　　处：《金属热处理》2002年第1期16-18,共3页Heat Treatment of Metals

摘　　要：利用激光熔凝硬化技术对灰口铸铁表面进行了硬化处理。通过SEM分析发现 ,熔凝硬化区呈现出典型分层结构 ,同时 ,因石墨的固溶强化作用 ,显著提高了熔凝区硬度和耐磨性。对不同扫描间距试样进行耐磨性试验表明 ,当扫描间距为 12mm时相对耐磨性达到极大值。Gray cast iron was treated by means of laser melt hardening technology.The microstructures were observed by SEM.It indicated that the hardening zone can be divided into three layers.Hardness and wear resistance of melted zone are increased obviously,because of solid solution hardening caused by melting of graphite.Wear test for samples with different scanning interval were carried out.The result shows that the relative wear resistance reaches the maximum,when the scanning interval is 12mm.

关 键 词：激光熔凝硬化 扫描间距 相对耐磨性 灰口铁 

分 类 号：TG163[金属学及工艺—热处理]