淬火油温对40CrMnMo钢钻杆组织和性能的影响  

Effect of quenching oil temperature on microstructure and properties of 40CrMnMo steel drill pipe

作　　者：钟彬 陈义庆 李琳 高鹏 伞宏宇 艾芳芳 田秀梅 Zhong Bin;Chen Yiqing;Li Lin;Gao Peng;San Hongyu;Ai Fangfang;Tian Xiumei(State Key Laboratory of Metal Material for Marine Equipment and Application,Anshan Liaoning 114009,China;Ansteel Iron&Steel Research Institute,Anshan Liaoning 114009,China)

机构地区：[1]海洋装备用金属材料及其应用国家重点实验室,辽宁鞍山114009 [2]鞍钢集团钢铁研究院,辽宁鞍山114009

出　　处：《金属热处理》2022年第6期98-102,共5页Heat Treatment of Metals

摘　　要：利用硬度测试、显观组织观察、力学性能及冲击性能测试等研究淬火油温对40CrMnMo钢钻杆淬火态的显微组织和截面硬度,回火态的拉伸性能和冲击吸收能量的影响。结果表明,淬火油温对钻杆的微观组织和硬度影响显著,进一步影响回火后的力学性能、屈强比和冲击吸收能量。随着淬火油温的升高,冷却速度先升高后降低,油温30~50℃为宜,淬透性好,微观组织均匀,晶粒细小,回火后力学性能好,屈强比高,具有较高的冲击性能和较好的韧性,综合性能良好。Effect of quenching oil temperature on microstructure and cross-section hardness of the quenched 40 CrMnMo steel drill pipe, the mechanical properties and the impact absorbed energy of the tempered state was studied by means of hardness test, microstructure observation, tensile property and impact property test. The results show that the quenching oil temperature has a significant effect on microstructure and hardness of the drill pipe, and further affects the mechanical properties, yield ratio and impact absorbed energy after tempering. With the increase of quenching oil temperature, the cooling rate increases firstly and then decreases, the optimum medium temperature is 30-50 ℃, at which the specimen has good hardenability, uniform microstructure and fine grains. After tempering, the specimen has good mechanical properties, high yield ratio, high impact property and good toughness, and good comprehensive property.

关 键 词：淬火油温 40CrMnMo钢钻杆 组织 性能 

分 类 号：TG172[金属学及工艺—金属表面处理]