表面技术2017，Vol.46Issue(2)：127-132,6.DOI:10.16490/j.cnki.issn.1001-3660.2017.02.020
盐浴氮碳共渗对65Mn弹簧钢耐磨性的影响
Effects of Salt Bath Nitrocarburizing on Wear Resistance of 65Mn Spring Steel
张伟林 1赵靖宇 1王光辉 1乔亚峥 1梁晓颖 1孙玉福1
作者信息
- 1. 郑州大学 材料科学与工程学院,郑州 450002
- 折叠
摘要
Abstract
The work aims to explore a technique which can significantly improve wear resistance of 65Mn spring steel to meet the performance requirements in high wear environment. 65Mn was treated with QPQ by virtue of orthogonal test to ex-plore the effects of nitriding temperature, nitriding time, oxidation temperature and oxidation duration on the microstructure and wear resistance of the samples by means of metallographic observation, SEM scanning and energy spectrum analysis as well as abrasive wear. And the conventional QPQ and thorough QPQ treatment schemes were optimized. The results of QPQ analysis showed that samples treated with QPQ were composed of oxide layer, loose layer, compound layer and diffusion layer from the outside towards the inside. In the samples treated with thorough QPQ, there was a layer of nitrogenous austenitic layer between the compound layer and diffusion layer. Main phase of the oxide layer was Fe3O4 while that of the compound layer was Fe3N. The distribution of C, N and O elements in the sample treated with QPQ after line-by-line scanning exhibited some regularity, i.e., the C elements were mainly on the surface, the N elements were mainly in the dense compound layer while the O elements were mainly on the surface and in loose holes. In the thorough QPQ process, the oxide layer is 15μm thick, the compound layer 30μm and the austenite layer 10μm when co-cementation continues for 2 hours at 640℃ and oxidation process 40 minutes at 350℃ . After thorough QPQ treatment, the wear rate of 65Mn is up to 65Mn and is provided with excellent wear resistance while the wear rate is 0.166 mg/m.关键词
65Mn/盐浴氮碳共渗/深层QPQ/化学热处理/渗层/耐磨性Key words
65Mn/salt bath nitrocarburizing/deep QPQ/chemical heat treatment/Infiltration layer/wear resistance分类
矿业与冶金引用本文复制引用
张伟林,赵靖宇,王光辉,乔亚峥,梁晓颖,孙玉福..盐浴氮碳共渗对65Mn弹簧钢耐磨性的影响[J].表面技术,2017,46(2):127-132,6.
