加热温度对19CrNi5钢组织及硬度的影响  

Effect of Heating Temperature on Microstructure and Hardness of 19CrNi5 Steel

作　　者：柳沛强 杨国[1] 贾羽 田文兵 马恒春[1] 孙子龙 LIU Pei-qiang;YANG Guo;JIA Yu;TIAN Wen-bing;MA Heng-chun;SUN Zi-long(Xi'ning Special Steel Group,Co.Ltd.,Qinghai Special Steel Engineering Technology Research Center,Xi'ning 810005,China)

机构地区：[1]西宁特殊钢股份有限公司青海省特殊钢工程技术研究中心,青海西宁810005

出　　处：《甘肃冶金》2020年第5期55-58,共4页Gansu Metallurgy

摘　　要：为了研究加热温度对19CrNi5钢组织及硬度的影响规律,进行了800℃、850℃、900℃、950℃、980℃、1000℃、1050℃、1100℃加热试验,在15℃室温下冷却,测定冷却速率,采用蔡司光学显微镜、布氏硬度计进行组织、硬度检验分析。结果表明:19CrNi5钢加热温度小于1000℃时组织为铁素体+珠光体,钢材硬度随温度的增加变化不大,当加热温度大于1000℃时组织为铁素体+珠光体+贝氏体,加热温度越高则硬度越高,且贝氏体占比越高,所以在轧制生产时,终轧温度应控制在1000℃以下。In order to study the effect of heating temperature on the microstructure and hardness of 19CrNi5 steel,the heating tests at 800℃、850℃、900℃、950℃、980℃、1000℃、1050℃and 1100℃were carried out.The cooling rate was measured at 15℃room temperature.The microstructure and hardness were examined and analyzed by Zeiss optical microscope and Brinell hardness tester.The results show that the microstructure of 19CrNi5 steel is F+P when the heating temperature is less than 1000℃,and the hardness of steel changes little with the increase of temperature.When the heating temperature is more than 1000℃,the microstructure is F+P+B.The higher the heating temperature is,the higher the hardness is,and the higher the proportion of bainite is.Therefore,the final rolling temperature should be controlled below 1000℃.

关 键 词：19CrNi5钢 加热温度 组织 硬度 

分 类 号：TG314[金属学及工艺—金属压力加工]