RX气+天然气渗碳工艺优化设计研究  

Research on Optimization Design of RX Gas+Natural Gas Carburization Process

作　　者：贾磊 于国超 邬俊祥 李晓艳 陈重 赵桄纬 刘文君 JIA Lei;YU Guochao;WU Junxiang;LI Xiaoyan;CHEN Chong;ZHAO Guangwei;LIU Wenjun(A Certain Unit Stationed in Baotou Area,Baotou 014030,China;Inner Mongolia Yiji Group Ruite Precision Mold Co.,Ltd.,Baotou 014030,China)

机构地区：[1]驻包头地区某单位,内蒙古包头014030 [2]内蒙古一机集团瑞特精密工模具有限公司,内蒙古包头014030

出　　处：《新技术新工艺》2024年第7期18-22,共5页New Technology & New Process

摘　　要：目前RX气+天然气渗碳工艺在国内推广较晚,对其工艺设计研究较少。为验证该渗碳工艺在军品零部件上的适用性,并实现工艺过程和渗碳产品质量可控,研究了典型渗碳材料在RX气+天然气气氛下渗碳后的渗层和心部微观组织、渗层均匀性、渗层硬度梯度以及淬火后的硬度均匀性等情况。研究表明,通过对RX气+天然气气氛下渗碳工艺过程研究,材料为20Cr2Ni4A的试样在RX气+天然气气氛下渗碳微观组织能够达到一级水平;渗层均匀性在满足标准的前提下实现了提升;渗碳层与基体之间的过渡层碳浓度梯度平缓,硬度均匀性较好,该工艺可适应于普通耐磨要求的渗碳件,但由于硬度很难达到60 HRC以上,因此,不建议60 HRC以上硬度要求的零件采用该渗碳工艺。At present,the promotion of RX gas+natural gas carburization process in China has been relatively late,and there was relatively little research on its process design.To verify the applicability of the carburizing process on military components and achieve controllable process and carburized product quality,it was studied that the microstructure,uniformity,hardness gradient,and hardness uniformity of infiltration layer and hear part of typical carburized materials after carburizing in an RX gas+natural gas atmosphere.Research showed that by studying the carburization process under RX gas+natural gas atmosphere,the microstructure of the sample made of 20Cr2Ni4A could reach the first level during carburization under RX gas+natural gas atmosphere,and the uniformity of the infiltration layer was improved while meeting the standards.It was gentle that the carbon concentration gradient in the transition layer between the carburized layer and the substrate,and the hardness uniformity was good.This process was suitable for carburized parts with ordinary wear resistance requirements.However,it was difficult to achieve hardness above 60 HRC,so it was not recommended to use this carburizing process for parts with hardness requirements above 60 HRC.

关 键 词：RX气 天然气 渗碳 渗层均匀性 硬度均匀性 硬度梯度 

分 类 号：TG153.3[金属学及工艺—热处理]