40CrNiMoA钢气体渗氮层硬度优化  

Hardness optimization of gas nitriding layer on 40CrNiMoA steel

作　　者：吕蓝冰 顾晓明 LÜLanbing;GU Xiaoming(Changzhou Tianshan Heavy Industry Machinery Co.Ltd.,Changzhou 213125,Jiangsu,China)

机构地区：[1]常州天山重工机械有限公司,江苏常州213125

出　　处：《金属加工（热加工）》2024年第1期68-72,共5页MW Metal Forming

摘　　要：通过分析40CrNiMoA钢调质基体硬度、回火索氏体数量、渗氮温度、氮势值,以及换气率对渗氮性能的影响,得出结论:硬化层深度(498HV1)随基体硬度提高而增加,随回火索氏体数量增加而增加,随渗氮温度降低而增加,随氮势值和换气率提高而增加。40CrNiMoA钢气体渗氮可以实现表面硬度达到600~635HV1,同时0.52mm深处达到498HV1的技术要求。By analyzing the effects of matrix hardness,tempered martensite quantity,nitriding temperature,nitrogen potential value,and gas exchange rate on nitriding performance of 40CrNiMoA steel,the study shows that the depth of the hardened layer/498HV1 increases with the increase of matrix hardness,tempering martensite quantity,decreasing nitriding temperature,and increasing nitrogen potential value and gas exchange rate.Gas nitriding of 40CrNiMoA steel can achieve a surface hardness of 600HV1 to 635HV1,while meeting the technical requirements of 498HV1 at a depth of 0.52mm.

关 键 词：40CRNIMOA钢 气体渗氮 高硬度区间 

分 类 号：TG156.82[金属学及工艺—热处理]