Ni60A+WC增强Fe基梯度涂层中M_6C颗粒的析出特征研究(英文)  

Precipitation of M_6C Particle in the Ni60A+WC Reinforced Fe-based Graded Coating

作　　者：袁有录[1,2] 李铸国[2] 

机构地区：[1]湖北汽车工业学院,湖北十堰442002 [2]上海交通大学上海市激光制造与材料改性重点实验室,上海200240

出　　处：《稀有金属材料与工程》2013年第S2期483-486,共4页Rare Metal Materials and Engineering

基　　金：National Natural Science Foundation of China(51171116);Ministry of Science and Technology of the People's Republic of China(Grant No.2009DFB50350);Research Foundation of Education Bureau of Hubei Province,China(Grant No.Q20122304);Doctoral Starting up Foundation of Hubei Universityof Automotive Technology,China(Grant No.BK201205)

摘　　要：以Fe30自熔合金粉末和镍包覆碳化钨粉末(Ni60A+WC)为原料,利用等离子熔覆工艺在Q235表面制备了Ni60A+WC增强Fe基多层梯度涂层。研究了铁基涂层中"富钨"型碳化物M6C的析出特征。结果表明,梯度涂层中析出的"富钨"型碳化物特征与Ni60A+WC含量有关,随着Ni60A+WC含量逐渐递增(0,10,20,30,40,50,质量分数,%),梯度涂层中出现了两类不同的"富钨"型M6C碳化物。第1类为枝晶间共晶碳化物M6C(Ni60A+WC含量小于30%),M6C中钨/铁元素的质量比小于5.29,形貌特征为片层状和粒状。第2类为块状小晶面初生碳化物M6C(Ni60A+WC含量大于30%),M6C中钨/铁元素的质量比大于5.29,形貌为多角块状、团簇状或等轴状。A Ni60A+WC reinforced Fe-based graded coating was fabricated by plasma cladding(PC) on a Q235 low carbon steel plate.The precipitation of M6C(M=W,Fe,Cr,Ni) particle in the graded coating was investigated by scanning electron microscopy(SEM),X-ray diffraction(XRD),and energy dispersive spectrometer(EDS).The results show that the shape characteristics of M6C are related to the content of Ni60A+WC in the graded coating.For example,when the content of Ni60A+WC increases from 0wt% to 30wt%,the shape of precipitated M6C is fine lamellar or granule particle in which the mass ratio of tungsten to iron is far less than 5.29,and when the content of Ni60A+WC increases from 30wt% to 50wt%,the shape of precipitated M6C is characterized by various faceted polygonal block,aggregative block,and equiaxial block in which the mass ratio of tungsten to iron is more than 5.29.

关 键 词：析出 M6C WC 碳化物 梯度涂层 

分 类 号：TG174.4[金属学及工艺—金属表面处理]