铈对45Cr2NiMoVSi热作模具钢组织及耐磨性的影响  

Effect of Cerium on Microstructure and Wear Resistance of 45Cr2NiMoVSi Hot Work Die Steel

作　　者：吴强[1] 李密文[1] 袁伟[1] 

机构地区：[1]内蒙古霍林河露天煤业股份有限公司机电修配厂,内蒙古霍林郭勒029200

出　　处：《铸造技术》2009年第10期1268-1271,共4页Foundry Technology

摘　　要：研究了添加5种不同含量Ce的45Cr2NiMoVSi热作模具钢的组织及耐磨性,通过分析组织和磨痕形貌,以及平均磨损率的变化情况,与不添加Ce的45Cr2NiMoVSi钢进行对比。结果表明,Ce添加量在适当的范围内组织得到显著细化,平均磨损率有了明显下降,磨痕形貌也比较细而浅,从而使耐磨性得到有效提高,并且当Ce添加量为0.22%(质量分数)时,45Cr2NiMoVSi钢的表面平均磨损量最少,耐磨性最好,其平均磨损率是不添加Ce的45Cr2NiMoVSi钢的34.21%。The microstructure and wear resistance of 45Cr2NiMoVSi hot work die steel with five different amount of Ce additive, and they were compared with that without Ce through microstrcture analysis, worn-out appearance and verage wearing rate. The results showed that after adding proper Ca, the microstructure was significantly refined, the average wearing rate was reduced significantly and the worn-out appearance was also relatively thin and shallow. Therefore, the wear resistance was improved effectively, When the addition of Ce equals to 0.22% （mass percent）, the least surface average wearing quantities and the best wearing resistance can be obtained in45Cr2NiMoVSi steel. The average wearing rate of 450r2NiMoVSi steel with Ce is 34.21% as that of 45Cr2NiMoVSi steel without Ca.

关 键 词：稀土铈 45Cr2NiMoVSi钢 组织 耐磨性 磨痕形貌 

分 类 号：TG142.1[一般工业技术—材料科学与工程]