摘要
对新型高密度高强度合金钢进行700~1100℃不同温度淬火+400℃回火处理,进行硬度、准静态拉伸测试,用扫描电子显微镜(SEM)、透射电子显微镜(TEM)、X射线衍射(XRD)、电子背散射衍射(EBSD)等研究了淬火温度对合金钢显微组织及力学性能的影响。结果表明:试验钢最佳淬火温度为800℃,后经400℃回火后可获得较好的强韧性匹配,此时抗拉强度为1907 MPa,屈服强度为1755 MPa,伸长率达8%。经热处理,试验钢基体析出细小弥散分布的μ相,随淬火温度提高,弥散分布的析出相数量减少,对试验钢产生的沉淀强化作用降低,强度因此降低。
The novel high density and high strength alloy steel was quenched at range of 700-1100℃and then tempered at400℃.The hardness and quasi-static tensile tests were performed,and scanning electron microscope(SEM),transmissionelectron microscope(TEM),and X-ray diffraction(XRD),electron backscatter diffraction(EBSD),etc.were employed toinvestigated the effect of quenching temperature on the microstructure and mechanical properties of alloy steel.The results showthat the optimum quenching temperature of the test steel is 800℃,and after tempering treatment at 400℃,a better strength-plastic matching can be obtained.The tensile strength is 1907 MPa,and the yield strength is 1755 MPa,and the elongation is8%.After heat treatment,fine and dispersedμphases precipitate in the test steel matrix.As the quenching temperatureincreases,the number of the dispersed precipitate phases decreases,resulting in a decrease in the precipitation strengtheningeffect and hence the strength.
作者
潘磊
王琳
刘安晋
程兴旺
PAN Lei;WANG Lin;LIU Anjin;CHENG Xingwang(School of Materials Science and Engineering,Beijing Institute of Technology,Beijing 100081,China;National Key Laboratory of Science and Technology on Materials under Shock and Impact,Beijing 100081,China)
出处
《兵器材料科学与工程》
CAS
CSCD
北大核心
2022年第3期104-109,共6页
Ordnance Material Science and Engineering
关键词
高密度高强度合金钢
淬火温度
力学性能
显微组织
Μ相
high density and high strength alloy steel
quenching temperature
mechanical properties
microstructure
μphase
