淬火温度对35Cr2Ni4Mo1V钢组织和力学性能的影响  

Effect of quenching temperature on microstructure and mechanical properties of 35Cr2Ni4Mo1V steel

作　　者：石永智 胡士廉[1] 胡俊[1] 蔡波[1] 徐宁 许婷婷 黄建文[1] SHI Yongzhi;HU Shilian;HU Jun;CAI Bo;XU Ning;XU Tingting;HUANG jianwen(Ningbo Branch of Chinese Academy of Ordnance Science,Ningbo 315103,China;Zhongyuan Special Steel Co.Ltd.,Jiyuan 458009,China)

机构地区：[1]中国兵器科学研究院宁波分院,浙江宁波315103 [2]中原特钢股份有限公司,河南济源458009

出　　处：《兵器材料科学与工程》2025年第2期109-114,共6页Ordnance Material Science and Engineering

基　　金：宁波市重点研发计划(2022Z056)。

摘　　要：将新型35Cr2Ni4Mo1V钢分别加热至980、1 000、1 020、1 040、1 060℃奥氏体化,保温后淬火,随后进行550℃回火,采用OM、SEM和TEM等表征方法观察显微组织,测定力学性能。结果表明:随着淬火温度的提高,奥氏体晶粒长大,室温拉伸性能先升后降,在1 020℃下淬火,抗拉强度、屈服强度分别达到最大值,1 568、1 348 MPa,在-40℃时低温冲击功为20.2 J,断后伸长率为12.5%,塑韧性匹配最佳。分析认为,由于调质后组织均匀细腻,且析出纳米级碳化物,使钢的强韧性升高;当淬火温度升至1 060℃时,晶粒变粗,且有M_(23)C_(6)型析出,材料塑韧性降低。The new 35Cr2Ni4Mo1V steel was heated to 980℃,1000℃,1020℃,1040℃and 1060℃for austenitization,quenched after heat preservation,and then tempered at 550℃.The results show that with the increase of quenching temperature,the austenite grains grow,and the tensile properties at room temperature show a law of first rising and then decreasing,and the tensile strength and yield strength reach the maximum of 1568 MPa and 1348 MPa respectively under the quenching condition of 1020℃,the impact energy at the low temperature of⁃40℃is 20.2 J,and the elongation after fracture is 12.5%,and the plastic⁃toughness matching is the best.According to the analysis,the strength and toughness of the steel are enhanced due to the uniform and delicate structure after quenching and tempering,and the precipitation of nanoscale carbide.When the quenching temperature increased to 1060℃,the grain became coarse,and M_(23)C_(6) type is precipitated,and the plasticity of the material decreases.

关 键 词：35Cr2Ni4Mo1V钢 淬火温度 回火托氏体 碳化物 力学性能 

分 类 号：TG142.2[一般工业技术—材料科学与工程]