摘要
采用粉末冶金法制备纯铁软磁材料,然后进行热锻,测试不同锻造温度和压力下锻件的密度和磁性能,并表征其显微组织,得出最佳的粉末冶金纯铁软磁材料锻造工艺。结果表明:提高锻造压力或锻造温度均可有效提高纯铁粉末锻件的密度与磁性能,随锻造压力上升,材料的饱和磁化强度Ms增大,矫顽力Hc先减小后增大。随锻造温度升高,Ms和Hc均增大。在锻造温度和压力分别为1166℃和1200MPa条件下获得的纯铁软磁材料,密度为7.821g/cm^3,相对密度为99.38%,Ms=2.024T,Hc=997.3A/m。锻件在1450℃温度下退火热处理后,Hc下降至437.0A/m。
The soft magnetic material of pure iron was prepared by powder metallurgy method, and then hot forging was carried out. The density and magnetic properties of the forgings at different forging temperatures and pressures were tested, the microstructure was detected and the optimal forging process of pure iron soft magnetic material of powder metallurgy was obtained. The results show that the density and magnetic properties of the forgings can be improved effectively by increasing the forging pressure and forging temperature. With the increase of forging pressure, the saturation magnetization Ms increases and the coercivity Hc decreases and then increases. With the increase of forging temperature, both Ms and Hc increase. The density and relative density of pure iron soft magnetic material are 7.821 g/cm and 99.38% respectively, Ms=2.024 T and Hc=997.3 A/m, at forging temperature and pressure of 1 200 ℃ and 1 166 MPa. After annealing at 1 450 ℃, the Hc of forgings decreases to 437.0 A/m.
作者
辛立军
江利民
张广安
王鸿健
周岐
XIN Lijun;JIANG Limin;ZHANG Guang’an;WANG Hongjian;ZHOU Qi(Institute of Materials Science and Engineering, Liaoning University of Technology, Jinzhou 121001, China)
出处
《粉末冶金材料科学与工程》
EI
北大核心
2019年第4期334-339,共6页
Materials Science and Engineering of Powder Metallurgy
基金
辽宁省高等学校产业技术研究院资助项目(cyyjy2018004)
关键词
粉末锻造
纯铁
软磁材料
密度
磁性能
powder metallurgy
pure iron
soft magnetic materials
density
magnetic property
