锯片基材75Cr1钢的热处理工艺及其组织性能  

Heat treatment process of 75Cr1 steel for saw blade substrate and its microstructure and mechanical properties

作　　者：董绍明 胡建文[1,2,3] 梁子玉 Dong Shaoming;Hu Jianwen;Liang Ziyu(School of Materials Science and Engineering,Hebei University of Science and Technology,Shijiazhuang Hebei 050018,China;Hebei Key Laboratory of Materials Near-Net Forming Technology,Shijiazhuang Hebei 050018,China;Hebei Engineering Laboratory of Aviation Lightweight Composite Materials and Processing Technology,Shijiazhuang Hebei 050018,China)

机构地区：[1]河北科技大学材料科学与工程学院,河北石家庄050018 [2]河北省材料近净成形技术重点实验室,河北石家庄050018 [3]航空轻质复合材料与加工技术河北省工程实验室,河北石家庄050018

出　　处：《金属热处理》2021年第9期193-198,共6页Heat Treatment of Metals

摘　　要：研究了锯片基材75Cr1钢不同热处理工艺下的组织、晶粒度、碳化物分布以及力学性能。结果表明:780~840℃之间淬火,组织为细小的针片马氏体+少量残留奥氏体。随淬火温度升高,硬度略有升高,但均在63 HRC水平附近,晶粒度由10级降至8级,晶粒不均匀程度也更加明显;随回火温度升高,组织由回火屈氏体转变为回火索氏体,细小的颗粒状碳化物增多。800℃淬火+540℃回火,75Cr1钢组织为回火索氏体,细小碳化物弥散分布,硬度36.5 HRC,具有良好的强度和塑韧性匹配。Microstructure,grain sizes,carbide distribution and mechanical properties of the 75Cr1 steel for saw blade substrate under different heat treatment processes were studied.The results show that microstructures are fine acicular martensite and a less amount of residual austenite after quenching between 780℃ and 840℃,and the hardness increases slightly with the increase of quenching temperature around the level of 63 HRC.The grain size decreases from grade 10 to grade 8,and unevenness of grains is greater with the increase of temperature.With the increase of tempering temperature,the microstructure changes from tempered troostite to tempered sorbite,and the amounts of granular carbides increase.Quenched at 800℃ and tempered at 540℃,the microstructure of tempered sorbite with a dispersed distribution of fine carbides is obtained.The hardness of the 75Cr1 steel is 36.5 HRC,with good matching of strength and toughness.

关 键 词：锯片用75Cr1钢 热处理工艺 组织 力学性能 晶粒度 

分 类 号：TG142.1[一般工业技术—材料科学与工程]