稀土对新型中碳CARMO模具钢组织和性能的影响  

Effect of RE on Microstructure and Properties of New Medium Carbon CARMO Die Steel

作　　者：曹立明[1] 赵平[1] 李强国[1] 王迹[1] 

机构地区：[1]西华大学材料科学与工程学院,四川成都610039

出　　处：《铸造技术》2012年第8期924-926,共3页Foundry Technology

摘　　要：实验研究了稀土变质处理对新型中碳CARMO模具钢组织和性能的影响,并利用扫描电镜、X射线能谱仪及显微硬度计等研究了该钢铸态及热处理态的成分、微观组织形貌及性能特点。结果表明,变质处理细化了晶粒,改善了铸态原始粗大枝晶及不均匀组织,夹杂物数量明显减少,共晶碳化物粒化且分布均匀,硬度增加3～5 HRC,冲击韧度提高178%。The effect of RE modification on the microstructure and properties of new medium carbon CARMO die steel was investigated, and the characteristic of microstructure and properties of cold work die were studied by using metallographic, EDS and hardness analysis instrument in as-cast and heat-treated condition. The results show that the modification refines grains, improves the original coarse cast dendritic and uneven microstructure. The number of inclusions reduces significantly, the eutectic carbides evenly distributes, the hardness increases 3-5 HRC and impact toughness is raised by 178%.

关 键 词：铸造模具钢 CARMO钢 稀土变质 显微组织 性能 

分 类 号：TG142.45[一般工业技术—材料科学与工程]