钨对Cr20高铬铸铁组织及性能的影响  

The Influence of Tungsten on Microstructure and Properties of Cr20 High Chromium Cast Iron

作　　者：刘晓芳[1] 赵靖宇[1] 孙玉福[1] 

机构地区：[1]郑州大学材料科学与工程学院,河南郑州450001

出　　处：《郑州大学学报（工学版）》2009年第3期122-125,共4页Journal of Zhengzhou University（Engineering Science）

摘　　要：研究了钨元素对Cr20高铬铸铁组织及性能的影响.试验结果表明,钨元素在碳化物和基体中均匀分布,钨的碳化物以WC1-x、W6C2.54、CW3形式存在.铸态组织为马氏体+奥氏体+碳化物.含钨量质量分数为1%时,硬度为56~59 HRC,冲击韧度为10~12 J/cm2,耐磨性是不含钨时的2倍,含钨量达到3%时,冲击韧度明显下降,但耐磨性是不含钨的2.3倍;含钨量为1.0%的试样经1 050℃淬火250℃回火,组织为马氏体+碳化物+少量残余奥氏体,硬度为60~61 HRC,冲击韧度为8~9 J/cm2,其耐磨性是不含钨的3.0倍.The influence of Tungsten on microstructure and properties of Cr20 high chromium cast iron was studied in this paper.The results indicate that the distribution of Tungsten is uniform in carbide and matrix.The carbide formation of Tungsten contains WC1-x,W6C2.54 and CW3.The as-cast microstructure consists of martensite,austenite and carbide.Hardness and Impact toughness of the sample containing 1%W are 56~59HRC and 10~12 J/cm2,respectively.The wear resistant is 2 times as good as that of the sample with no T...

关 键 词：钨 Cr20高铬铸铁 组织 性能 

分 类 号：TG143[一般工业技术—材料科学与工程]