表面粗糙度对25Cr3MoA钢氮化层深度和组织的影响  

Effects of Surface Roughness Degree on Depth and Microstructure of Nitride Layer for 25Cr3MoA Steel

作　　者：古璟 周石桥 

机构地区：[1]江苏南京航空机电系统综合航空科技重点实验室,江苏南京210061

出　　处：《热加工工艺》2014年第4期195-196,共2页Hot Working Technology

摘　　要：选取25Cr3MoA钢为研究对象,采用不同的机加工方式结合干湿吹砂的方法,制备了不同表面粗糙度的25Cr3MoA钢。采用JB-3C型粗糙度仪测试钢的表面粗糙度,然后对不同粗糙度的25Cr3MoA钢进行氮化处理,用FM-7显微维氏硬度计和体视显微镜对氮化层进行观察,研究粗糙度对氮化层深度和组织的影响,分析产生不同差异的原因。25Cr3MoA steel was chosen as material object, different machining technologies combining with dry or wet sand blowing were used to prepare different degrees on surface roughness for materials 25Cr3MoA. JB-3C roughness degree testing instrument and stereo microscope were used to inspect nitride layers. Then the materials were subjected to a heat-treatment in nitrogen. Effects of surface roughness degrees on depth and microstructure of nitride layer were researched. Reasons of difference were analyzed.

关 键 词：表面粗糙度 氮化深度 氮化组织 25CR3MOA 

分 类 号：TG156.82[金属学及工艺—热处理]