摘要
利用自制的低温气体多元共渗控制系统,在570℃于可控气氛下（氨气与氧气的体积比为8∶1）对38CrMoAl钢进行了2 h氧氮共渗处理。采用OM、XRD分析,显微硬度测试,摩擦磨损试验和中性盐雾试验等手段,研究了38CrMoAl钢经共渗处理后的表面组织形貌、硬度与耐磨耐蚀性能。结果表明,38CrMoAl钢气体氧氮共渗后渗层深度为0.25 mm,表面有15μm左右均匀致密的白亮层,渗层主要由ε-Fe2～3N和γ′-Fe4N和少量的α-Al2O3组成,表面硬度为780～1130 HV0.1,与原材料相比,经过氧氮共渗处理后的样品的耐磨性和抗蚀性大幅度提高。
The 38CrMoAl steel was oxynitrided at 570 ℃ for 2 h in controlled atmosphere（ using a gas mixture NH3：O2 = 8 ： 1 ）. The microstructure, wear resistance and corrosion resistance of 38CrMoAl steel treated by gas oxynitriding were studied by OM, XRD, microhardness test, friction and wear test and neutral salt spray test. The results show that the diffuse layers by gas oxynitriding are about 0. 25 mm, and about 15 μm uniform compact white layers on the steel surface. The composition of the oxynitriding layer consists of ε-Fe3N, γ′-Fe4N and a little α-Al2O3. The surface microhardness of the layers is 780-1130 HV0. 1. The wear resistance and corrosion resistance after gas oxynitriding of the sample are improved obriously compared with the untreated one.
出处
《金属热处理》
CAS
CSCD
北大核心
2008年第12期46-48,共3页
Heat Treatment of Metals
基金
西南交通大学青年教师科研起步项目(2007Q008)
关键词
气体氧氮共渗
显微硬度
耐磨性
抗蚀性
gas oxynitriding
microhardness
wear resistance
corrosion resistance
