稀土对中碳中合金ZG70Cr2MnNiSi钢组织和性能的影响  

Effect of Rare Earth on Microstructure and Property of Medium Carbon Medium Alloy ZG70Cr2MnNiSi Steel

作　　者：王星贺[1] 杨涤心[1,2] 谢敬佩[1] 王文焱[1] 王爱琴[1] 

机构地区：[1]河南科技大学材料科学与工程学院,河南洛阳471023 [2]河南省有色金属材料科学与加工技术重点实验室,河南洛阳471023

出　　处：《中国稀土学报》2013年第3期315-320,共6页Journal of the Chinese Society of Rare Earths

基　　金：河南省国际科技合作项目(084300510006)资助

摘　　要：中碳中合金钢是近年发展起来的一种新型耐磨材料,可通过微合金化和变质处理来提高该钢种的强韧性。本研究以ZG70Cr2MnNiSi钢为研究对象,选用了两种稀土复合变质剂对其进行变质处理,测试并比较了不同变质剂处理后钢的力学性能和磨损性能,分析了钢的XRD物相图谱、金相组织、断口形貌和TEM微观组织,研究结果表明:变质处理有利于马氏体高密度位错的形成,促进了组织细化和碳化物的弥散析出,从而提高了铸钢的综合力学性能。Medium carbon medium alloy steel is a new type of wear resistant material developed in recent years. The steel＇s obdurability can be improved by mi- croalloying and modification. This research took ZG70Cr2MnNiSi steel as object of study, chose two kinds of rare earth composite modifiers, made the modifying experiments, tested and compared mechani- modification. The XRD phase diagram, metallographic organization, fracture morphology and TEM fine tex- ture were analyzed. The result showed that the modifi- cation treatment promoted the formation of high-density dislocation martensite, and promoted organization refi- ning and dispersion precipitation of carbide, so im- proved the comprehensive mechanical properties of cal property and wear properties of steel with different cast steel.

关 键 词：中碳中合金钢 稀土变质 耐磨性能 断口形貌 粒状碳化物 

分 类 号：TG142.72[一般工业技术—材料科学与工程]