40CrNiMo钢调质工艺与性能的研究  

Study on the Quenching&Tempering Technology and Properties of 40CrNiMo Steel

作　　者：文华 王霞 李新荣 WEN Hua;WANG Xia;LI Xinrong(Meishan CRRC Fasterner Science&Technology Co.,Ltd.,Meishan 620010,Sichuan,China)

机构地区：[1]眉山中车紧固件科技有限公司,四川眉山620010

出　　处：《热处理技术与装备》2024年第6期13-16,共4页Heat Treatment Technology and Equipment

摘　　要：通过拉伸、冲击等试验研究了不同调质工艺对风电紧固件用40CrNiMo钢力学性能的影响。结果表明,淬火温度过低、保温时间过短会导致材料加热不充分,从而降低材料强度;淬火温度过高、保温时间过长会导致材料奥氏体晶粒长大,从而降低材料韧塑性。当淬火温度为860℃、保温时间为80 min时,φ56 mm的40CrNiMo钢具有较高强度和良好的韧塑性;当回火温度为540~580℃、保温时间为150 min时,φ56 mm的40CrNiMo钢调质处理后具有良好的综合力学性能,能有效满足风电紧固件的性能要求。The effects of different quenching and tempering processes on the mechanical properties of 40CrNiMo steel used for wind power fasteners were studied by tensile and impact tests.The results show that too low quenching temperature and too short holding time will lead to insufficient heating of the material and reduce the strength of the material.Too high quenching temperature and too long holding time will lead to austenite grain growth of the material,thus reducing the toughness and plasticity of the material.When the quenching temperature is 860℃and the holding time is 80 min,the 40CrNiMo steel withϕ56 mm has high strength and good toughness and plasticity.When the tempering temperature is 540 to 580℃and the holding time is 150 min,the 40CrNiMo steel ofϕ56 mm has good comprehensive mechanical properties after quenching and tempering treatment,and can effectively meet the performance requirements of wind power fasteners.

关 键 词：40CRNIMO钢 风电紧固件 调质工艺 力学性能 

分 类 号：TG156.6[金属学及工艺—热处理]