检测方法对20CrNiMoH钢奥氏体晶粒度的影响  

Influence of Testing Methods on Austenite Grain Size of 20CrNiMoH Steel

作　　者：董凤奎 黄山 刘年富 钟芳华 DONG Feng-kui;HUANG Shan;LIU Nian-fu;ZHONG Fang-hua(Baowu JFE Special Steel Co.,Ltd.,Shaoguan Guangdong 512123,China;Guilin Fuda Gear Co.,Ltd.,Guilin Guangxi 541199,China)

机构地区：[1]宝武杰富意特殊钢有限公司,广东韶关512123 [2]桂林福达齿轮有限公司,广西桂林541199

出　　处：《热处理技术与装备》2024年第1期53-55,共3页Heat Treatment Technology and Equipment

摘　　要：奥氏体晶粒度是衡量钢材质量的一个重要指标,研究了奥氏体晶粒度显示方法对20CrNiMoH渗碳齿轮钢奥氏体晶粒度检测结果的影响。结果表明,氧化法和直接淬硬法检测的奥氏体晶粒度差别较小,渗碳法检测的奥氏体晶粒比氧化法和直接淬硬法低0.2~0.3级,模拟渗碳法检测奥氏体晶粒度存在混晶现象。对造成模拟渗碳法出现混晶的原因进行了分析,并给出了改进措施,确保使用模拟渗碳法检测奥氏体晶粒度仍没有混晶现象出现。Austenite grain size is an important index to measure the quality of steel.The influence of austenite grain size display method on the austenite grain size detection result of 20CrNiMoH carburized gear steel was studied.The results show that the difference of austenite grain size detected by oxidation procedure and direct hardening procedure is small,the austenite grain size detected by carburizing procedure is 0.2 to 0.3 grade lower than that by oxidation procedure and direct hardening procedure,and there is mixed crystal phenomenon in the grain size detected by mock carburizing procedure.The causes of mixed crystal in simulated carburizing procedure are analyzed,and the improvement measures are given to ensure that no mixed crystal phenomenon occurs in the detection of austenite grain size by simulated carburizing procedure.

关 键 词：20CrNiMoH钢 奥氏体晶粒度 混晶 

分 类 号：TG142.25[一般工业技术—材料科学与工程]