摘要
采用ＣＯ＿２连续波激光器对Ｗ１８Ｃｒ４Ｖ高速钢进行激光重熔和固态相变硬化处理。高速钢激光重熔层的显微组织为极细小的材枝晶和枝晶问富Ｗ、Ｖ、Ｃｒ合金元素的奥氏体及Ｍ＿６Ｃ碳化物，枝晶内为针状和板条状混合马氏体。固态相变硬化处理后显微组织为马氏体、残余奥氏体和未溶碳化物，晶粒显著细化。磨损试验证实，激光重熔处理使高速钢耐磨性降低，激光固态相变硬化处理比常规１２６０℃淬火５６０℃三次回火处理的耐磨性有明显提高。
The laser remelted and solid-state transformation hardening processing on W18Cr4V high speed tool steel have been made using a CO_2 continuous wave laser device.The mieroro structure of laser remelted layer consists of extremely fine dendrite,both austenite rich in W,V, Cr & M_6C carbide in the interdendriTIC regIons.roth needle-like and lath mar lensite existed in the dendrite,It consists of mar tensile,residual austensite and undissolved carbide in solid-state transformation layer,and the grain was fined remarkably. It was showed that wear resistance of high speed tool steel was decresedby laser remelted processing,but wear resistance after solid-state transformation hardening processing was higher than that of generally 1260℃quenching 560℃ tempering three times.
出处
《兵器材料科学与工程》
CAS
CSCD
北大核心
1994年第2期41-46,共6页
Ordnance Material Science and Engineering
关键词
高速钢
显微组织
激光热处理
钢
high speed tool sreel,laser technique, microstructure,Wear resistance
