摘要
通过控制气氛流量和淬火温度,对45钢进行碳氮共渗热处理试验,并进行表面硬度以及显微组织检测和有效硬化层深度分析。结果表明,在氮气、乙炔和氨气流量分别为56、56和38 L/min,且在880℃碳氮共渗、800℃淬火的碳氮共渗热处理工艺下,45钢表层组织为针状马氏体、少量含碳氮残留奥氏体和碳氮化合物,心部组织为低碳马氏体和先共析铁素体,表面硬度均匀性提高,有效硬化层深度在0.60 mm左右。
By controlling the atmosphere flow rate and quenching temperature,a carbonitriding heat treatment test was conducted on 45 steel,followed by surface hardness,microstructure examination,and effective hardened layer depth analysis.The results show that under the carbonitriding heat treatment process with nitrogen,acetylene,and ammonia flow rates of 56,56,and 38 L/min,respectively,and carbonitriding at 880℃and quenching at 800℃,the surface microstructure of the 45 steel consists of acicular martensite,a small amount of carbonitride-containing retained austenite,and carbonitride compounds,while the core microstructure is composed of low-carbon martensite and proeutectoid ferrite.The surface hardness uniformity is improved,and the effective hardened layer depth is approximately 0.60 mm.
作者
何龙祥
孟令辉
胡圣华
路鸣君
He Longxiang;Meng Linghui;Hu Shenghua;Lu Mingjun(Zhongji Vacuum Technology(Jinan)Co.,Ltd.,Jinan Shandong 250217,China)
出处
《金属热处理》
北大核心
2025年第8期239-242,共4页
Heat Treatment of Metals
关键词
真空碳氮共渗
淬火
45钢
气体流量
硬度均匀性
vacuum carbonitriding
quenching
45 steel
gas flow rate
hardness uniformity
