热处理对铸造高钨高速钢组织的影响  

Effect of Heat Treatment on Structure of Casting of High Tungsten High Speed Steel

作　　者：周鹤[1] 魏世忠[2] 徐流杰[2] 

机构地区：[1]河南科技大学材料科学与工程学院,河南洛阳471003 [2]河南科技大学河南省耐磨材料工程技术研究中心,河南洛阳471003

出　　处：《铸造》2014年第2期181-184,189,共5页Foundry

基　　金：国家自然科学基金(51171060)

摘　　要：采用铸造法制备了高钨高速钢,利用XRD、OM和SEM研究热处理后高钨高速钢中碳化物与基体的演变。结果表明:铸态组织中一次碳化物为M6C,主要沿晶界分布,M6C与基体之间存在过渡区域。退火后过渡区域消失,继续淬火后有少量细小的二次碳化物沿晶界析出,回火后二次碳化物大量沿晶界析出。铸态高钨高速钢未经过退火处理而直接进行淬火和回火处理后,基体主要是奥氏体,而且仅析出少量的二次碳化物。High tungsten High speed steel is prepared by casting. The organizational and carbides change in high speed steels after heat treatment is studied on by using XRD, OM, SEM. The M6C carbides is discovered in as-cast HSS mainly along the crystal boundary distribution, and between M6C carbide and substrate have the transition region. After annealing, the transition region disappears. A few tiny secondary carbides separate out along the crystal boundary after quenching. After quenching has the few tiny secondary carbides along the crystal boundary separation, and more secondary carbides separate out along crystal boundary after tempering. The as-cast high tungsten high speed steel is quenched and tempered treatment directly without annealing, the organizational mainly is directly the austenite, moreover only separates out the few secondary carbides.

关 键 词：钨 高速钢 热处理 显微组织 

分 类 号：TG161[金属学及工艺—热处理]