钛合金双辉离子无氢渗碳中的离子绕射现象  

Ions Diffraction Phenomena in Hydrogen-Free Carburizing on Ti Alloys by Double Glow

作　　者：张高会[1] 张平则[2] 刘兴来[3] 徐重[4] 

机构地区：[1]中国计量学院,浙江杭州310018 [2]南京航空航天大学,江苏南京210016 [3]中北大学,山西太原030051 [4]太原理工大,山西太原030024

出　　处：《测试技术学报》2008年第4期287-290,共4页Journal of Test and Measurement Technology

基　　金：浙江省科技厅资助项目(2007C21139)

摘　　要：针对钛合金耐磨性差、易产生氢脆的特性,以格栅状高纯度固体石墨做源极,钛合金Ti6Al4V做阴极,氩气作为工作气体,依靠辉光放电和空心阴极效应在Ti6Al4V表面制备渗碳合金层;X射线衍射和辉光放电光谱试验显示,合金层由高硬度相TiC及游离态减磨C相组成;渗层内C元素的含量呈梯度分布;表面硬度大幅度提高,由表及里硬度梯度降低;反复试验表明,试样周围高浓度、稳定的渗碳气氛对形成理想的渗碳效果是非常重要的.The carburized layer was prepared on the titanium alloyTI6AL4V surface to improve its wear resistance and to avoid hydrogen brittleness by using double glow discharge plasma carburizing technique and hollow cathode effect. High-purity netlike solid graphite was used as source and titanium alloy TI6AL4V was used as cathode substrate material. Argon gas was used as working gas. The carburized layer can be obviously observed under microscope. X-ray diffraction indicates that TiC phase with higher hardness and dissociate state carbon phase have been formed in carburized layer. The glow discharge spectrum （GDS） analysis shows that carbon concentration is gradient distribution along the depth of carburized layer. Surface hardness of the substrate has increased obviously. Hardness distribution is gradually decreased from the surface to inner of carburized layer. It is very important to form a high concentration of C element and steady carburizing atmosphere to get an ideal carburized effect.

关 键 词：TI6A14V 双辉 无氢渗碳 渗碳气氛 

分 类 号：TG115.221.5[金属学及工艺—物理冶金]