淬火-配分处理对齿轮轴用钢组织性能的影响  

Effect of Quenching and Partitioning Treatment on Microstructure and Properties of Steel for Gear Shafts

作　　者：李敏[1] 姚玉梅[1] 李俊杰 郭晓光 卢志安 LI Min;YAO Yumei;LI Junjie;GUO Xiaoguang;LU Zhi′an(Henan Mechanical and Electrical Vocational College,Xinzheng 451191,Henan,China;Henan Technical Institute,Zhengzhou 450042,Henan,China;Zhengzhou University,Zhengzhou 450001,Henan,China)

机构地区：[1]河南机电职业学院,河南新郑451191 [2]河南应用技术职业学院,河南郑州450042 [3]郑州大学,河南郑州450001

出　　处：《矿冶工程》2024年第6期170-174,共5页Mining and Metallurgical Engineering

基　　金：河南省科技攻关项目(192102310244)。

摘　　要：对齿轮轴用合金结构钢进行了淬火-配分处理,研究了配分温度和配分时间对其拉伸性能、物相组成、显微组织和断口形貌的影响。结果表明:固定淬火终点温度和配分温度不变,延长配分时间,齿轮轴用钢抗拉强度逐渐减小、断后伸长率先增大后减小;配分温度225℃和275℃时最大断后伸长率分别出现在配分时间120 s和90 s;延长配分时间,齿轮轴用钢的强塑积先增后减,配分时间90 s时达到最大值,且淬火-配分处理试样强塑积明显高于直接淬火试样。直接淬火试样中几乎没有残余奥氏体,而淬火-配分试样中残余奥氏体体积分数为3.0%~6.4%。相同配分温度下延长配分时间,齿轮轴用钢会发生马氏体回火转变以及碳化物析出与长大。The alloy structural steel for gear shafts was treated by adopting a quenching and partitioning process,and effects of temperature and time of partitioning on the tensile properties,physical phase composition,microstructure and fracture morphology of structural steel were all explored.The results show that when the end temperature of fixed quenching and temperature of partitioning remain unchanged,extension of partitioning time can lead to gradual decrease in the tensile strength of the steel for gear shafts,and an increase followed by decrease in the fracture strain;with partitioning temperature at 225 ℃ and 275 ℃ respectively,the highest fracture strain is obtained at partitioning time of 120 s and 90 s,respectively;extension of partitioning time can lead to an increase followed by decrease in the strength-elongation product of the steel for gear shafts;the highest strength-elongation product can be obtained when the partitioning time is 90 s,and the strength-elongation product of the sample after quenching and partitioning treatment is obviously higher compared to the sample just treated by quenching.There is almost no residual austenite in the directly quenched sample,while the residual austenite in the sample by quenching and partitioning treatment is in a volume fraction of 3.0%-6.4%.It is found that at the same partitioning temperature,extension of partitioning time can result in martensitic tempering transformation,and carbide precipitation and growth in the steel for gear shafts.

关 键 词：齿轮轴 淬火-配分 拉伸性能 显微组织 强塑积 齿轮钢 热处理 

分 类 号：TG142.1[一般工业技术—材料科学与工程] TG161[金属学及工艺—金属材料]