氮化时间对W9Mo3Cr4V钢离子氮化层显微组织和性能的影响  

Effect of Nitriding Time on Microstructure and Properties of W9Mo3Cr4V Steel Plasma Nitrided Layer

作　　者：潘明明[1] 王守晶[1] 慕晓龙 PAN Mingming;WANG Shouting;MU Xiaolong(School of Metal Materials Engineering,Liaoning Shihua University,Fushun l l3001,China;Liaohe Oilfield Gas Corporation,Panjin 124000,Chin)

机构地区：[1]辽宁石油化工大学金属材料工程系,辽宁抚顺113001 [2]辽河油田燃气集团公司,辽宁盘锦124000

出　　处：《热加工工艺》2018年第4期177-179,共3页Hot Working Technology

摘　　要：对W9Mo3Cr4V钢在520℃下进行不同氮化时间的离子氮化处理,并采用金相分析、显微硬度测试和X射线衍射分析等方法,研究了氮化时间对离子氮化层显微组织(氮化层相组成和氮化层厚度)和性能(硬度、硬度梯度分布等)的影响。结果表明:氮化层主要由ε相(Fe_3N)和γ'相(Fe_4N)组成。随离子氮化时间的延长,ε相(Fe_3N)衍射强度逐渐降低,而γ'相(Fe_4N)的衍射强度呈逐渐升高的趋势,且氮化层的厚度、显微硬度不断增加。氮化层均呈理想的硬度梯度分布。Plasma nitriding was carried out on W9Mo3Cr4V steel at 520 ℃ for different time. By microscopicexamination, microhardness determination and X-ray diffraction phase structure analysis, the effects of nitriding time on themicroscopic (phase composition of nitrided layer, thickness) and properties (microhardness, microhardness gradient) wereinvestigated. The results indicate that nitride layer mainly consists of e phase (Fe3N) and "y' phase(Fe4N). With the increase ofnitriding time, the diffraction peak of e-phase (FesN) gradually decreases, and the diffraction peak of Y phase (Fe4N) graduallyincreases. The thickness and microhardness of the nitride layer increase. The nitride layer exhibits desirable hardness gradientdistribution.

关 键 词：W9MO3CR4V 离子氮化 显微组织 性能 

分 类 号：TG156.82[金属学及工艺—热处理]