淬火介质对45钢力学性能的影响

Effect of Quenching Medium on Mechanical Property of 45 Steel

采用HRD-150洛氏硬度计、JEM-5610LV扫描电子显微镜、AG-1/250 kN电子拉伸试验机,研究了体积分数为8%的BW、体积分数为15%的F2000以及N32机油淬火介质对45钢试样淬火后的微观组织、断口形貌、屈服强度、抗拉强度、断面收缩率及延伸率和硬度分布曲线的影响。研究结果表明:在体积分数为8%的BW内淬火,试样能够得到理想的马氏体。试样的屈服强度、抗拉强度、延伸率以及硬度高于在体积分数为15%的F2000和N32机油内淬火的相应值。

By using HRD-150 rock-well hardness tester,JEM-5610LV scannimg electron microscope,and AG-1 /250 kN electronic tensile testing machine,the effects of volume fraction 8%BW,volume fraction 15%F2000 and N32 quenching medium on microstructure,fracture morphology,yield strength,tensile strength,elongation and hardness distribution curve of the 45 steel were studied.The results showed that the ideal martensite structure can be obtained after the sample was quenched in volume fraction 8%BW.Yield strength,tensile strength,elongation and hardness of the sample quenched in volume fraction 8%BW are better than those quenched in F2000 or N32 oil.