气体氮碳共渗及后氧化复合处理研究  

Study on Gas Nitro Carburizing of Total Permeability&Post-Oxidation Composite Processing

作　　者：唐光辉 肖江华 潘行杰 TANG Guanghui;XIAO Jianghua;PANG Xingjie(Ningbo Jingyi Miniature Axle Co.,Ltd.,Ningbo Zhejiang 315500)

机构地区：[1]宁波精益微型轴有限公司,浙江宁波315500

出　　处：《河南科技》2021年第19期111-114,共4页Henan Science and Technology

基　　金：宁波市奉化区科技计划项目(201904107)。

摘　　要：本研究采用气体氮碳共渗及后氧化复合表面处理技术对45#钢和40Cr钢表面进行改性,并对处理后工件的硬度、金相组织、尺寸变形量、表面粗糙度、耐蚀性进行研究。结果表明:经复合处理后45#钢和40Cr钢表面硬度明显提高,分别为HV_(0.1)580和HV_(0.1)637;两种材料渗层金相组织均由白亮层及氧化层组成,45#钢和40Cr钢白亮层厚度分别为22.4μm和19.6μm,氧化层厚度均为1.7μm;复合处理后两种材料直线度没有较大变化,外径均略有增大,45#钢外径增大0.0063 mm,40Cr钢增大0.0027 mm;粗糙度基本保持不变;盐雾试验结果显示,复合处理的45#钢和40Cr钢经400 h中性盐雾试验无锈点,具有良好的耐蚀性。The surface of 45#steel and 40Cr features improved by gas nitrogen carburizing and post oxidation combined surface treatment,study on the hardness,metallographic structure,dimension deformation,surface roughness and corrosion resistance.The results show that the surface hardness of 45#steel and 40Cr is improved obviously after composite treatment.The Measured values are HV_(0.1)580 and HV_(0.1)637 Respectively,The metallographic structure of the infiltration layer of the two materials is composed of the white-bright layer and the oxide layer.The thickness of 45#steel and 40Cr white-bright layer are 22.4μm and 19.6μm respectively,both of the oxide layer thickness layer are 1.7μm.The two materials straightness accuracy did not change greatly after treatment.The outer diameter was increased slightly;45#steel material outer diameter increased by 0.0063 mm,40Cr material increases by 0.0027 mm as well as the roughness no change basically.The results of salt spray test show that the composite 45#steel and 40Cr material have no rust points after 400 hours neutral salt spray test which means have good corrosion resistance.

关 键 词：气体氮碳共渗 后氧化 复合处理 耐蚀性 

分 类 号：TG156.8[金属学及工艺—热处理]