20CrMnMo钢稀土碳氮共渗工艺的研究  

Study on Rare Earth Carbonitriding Technology of 20CrMnTi Steel

作　　者：蔡小勇[1] 陈启武 戴品强[1,2] 颜琦 CAI Xiaoyong;CHEN Qiwu;DAI Pinqiang;YAN Qi(College of Materials Science and Engineering, Fuzhou University, Fuzhou 350116 China;College of Materials Science and Engineering, Fujian University of Technology, Fuzhou 350116, China)

机构地区：[1]福州大学材料科学与工程学院,福建福州350116 [2]福建工程学院材料科学与工程学院,福建福州350116

出　　处：《热加工工艺》2018年第6期233-235,共3页Hot Working Technology

基　　金：福建省高校产学合作项目(2014H6005)

摘　　要：采用滴注方法对20CrMnMo钢进行了稀土（RE）碳氮共渗,研究了稀土对碳氮共渗处理工艺和力学性能的影响,获得了最佳工艺参数。结果表明,稀土元素对20CrMnMo钢稀土碳氮共渗有明显的催渗作用,可使工件的有效硬化层深度加厚,改善工件的冲击性能和耐磨性;提高碳氮共渗温度可使有效硬化层增加;较佳工艺是共渗温度900℃＋8g/L稀土配入比例。The rare earth （RE） carbonitriding of 20CrMnMo steel was carried out by using the infusion method. The effects of rare earth on the carbonitriding process and the mechanical properties were investigated. The optimum process parameters were obtained. The results show that rare earth elements have obvious catalysis effect on RE-carbonitriding of 20CrMnMo steel, which can make the effective hardening layer of the workpieces thicker and improve the impact performance and wear resistance of the workpiecs. Increasing the carbonitriding temperature can increase the effective hardening layer. The optimum process is permeation temperature at 900 ℃ ＋ rare earth ratio of 8 g/L.

关 键 词：稀土碳氮共渗 20CRMNMO钢 有效硬化层 冲击韧性 耐磨性 

分 类 号：TG156.81[金属学及工艺—热处理]