Fe-14Mn-6Si-5Ni合金表面渗层组织及性能研究

Study on Microstructure and Properties of Coating on the Surface of Fe-14Mn-6Si-5Ni Alloy

采用料浆包渗法,以Cr2O3粉为Cr源,纯Al粉为还原剂,NH4Cl作为活化剂,Al2O3为惰性添加剂,蛋清为粘结剂,在Fe-14Mn-6Si-5Ni合金表面经900℃、10小时料浆包渗制备渗层。研究了渗层显微组织、耐磨性和耐腐蚀性能。结果表明:渗层组织为含元素Al、Cr的固溶体;显微硬度为460 HV,为基体合金的1.4倍,摩擦因数为0.35,为基体的1/2。浸泡腐蚀速率为Fe Mn Si基合金的1/10。

In this paper, the coating was prepared by the slurry pack cementation on the surface of Fe-14Mn-6Si-5Ni alloy at 900℃ for 10 h ours. A slurry pack cementation mixture was composed of Cr2O3 powder as chrominizing source, pure Al powder as reducer, NH4Cl as the activator, Al2O3 as the inert additive and albumen (egg white) as cohesive agent. The microstructure, wear resistance and corrosion resistance of coating has been studied. The results showed that the microstructure of the coating is composed of solid solution with Al and Cr;the microhardness of coating with a value of 460 HV was 1.4 time than that of the matrix alloy, friction coefficient of the coating was 0.35, 1/2 of that of matrix alloy, and the rate of corrosion of coating was one tenth of that of the FeMnSi based alloy.