摘要
采用光学显微镜、SEM、EDS、洛氏硬度计、摆锤冲击试验机等设备,通过显微组织特征观察,分析碳化物类型及演变规律,结合硬度、冲击性能表现,研究了Si、Mo、V等合金元素和回火工艺制度对两种成分的H13型钢组织与性能的影响。结果表明:由于合金元素含量的不同,两种钢淬火后平均晶粒尺寸相差10μm左右,组织中碳化物类型及尺寸差别明显;随着回火次数的增多,两种钢组织中碳化物尺寸逐渐变大,马氏体板条特征逐渐减弱,硬度变化不大,仅下降0.7 HRC,冲击性能明显提高,同时低Si高Mo的试验钢的冲击吸收能量比另一试验钢平均高出约117 J。
Effects of alloying elements such as Si,V and Mo and tempering process on the microstructure and properties of two components of H13 steel were studied by using the optical microscope,scanning electron microscopy(SEM),EDS,Rockwell hardness tester,pendulum impact tester.Through observation of the microstructure characteristics,the types and evolution of carbides were analyzed,and the hardness and impact properties were combined to study the effects.The results show that the average grain size of the two steels differs by about 10μm and the types and sizes of carbides in the microstructure are obviously different due to the different content of alloying elements.The carbide size in the microstructure of the two steels gradually grows large with the increase of the tempering times.The lath characteristics of martensite gradually weaken,but the hardness decreases by only 0.7 HRC,and the impact properties improve significantly.Moreover,the tested steel with low Si content and high Mo content is about 117 J higher than that of the other tested steel.
作者
张立嵩
李壮
赵恒良
叶丽燕
梁培新
翟月雯
周乐育
Zhang Lisong;Li Zhuang;Zhao Hengliang;Ye Liyan;Liang Peixin;Zhai Yuewen;Zhou Leyu(School of Materials Science and Engineering,Shenyang Aerospace University,Shenyang Liaoning 110136,China;Beijing Research Institute of Mechanical and Electrical Technology,Ltd.,Beijing 100083,China)
出处
《金属热处理》
CAS
CSCD
北大核心
2019年第12期66-71,共6页
Heat Treatment of Metals
基金
“高档数控机床与基础制造装备”科技重大专项(2018ZX04044001)
