摘要
为研究耐蚀软磁合金FeCr16中σ相析出行为,利用热力学软件Thermo-Calc计算了该合金体系的平衡相转变图。根据热力学计算结果,通过光学显微镜(OM)、扫描电镜(SEM)和能谱仪(EDS)研究了时效处理温度以及Cr含量对耐蚀软磁合金FeCr16中σ相析出行为的影响,并对其磁性能进行了测试。热力学计算结果表明,在温度低于560℃时,合金中有σ相析出。试验结果表明,σ相在500℃时尺寸和析出量最大,合金的磁感应强度在500℃出现最小值,因此σ相的大量析出会降低合金的磁性能。Cr元素的偏析会促进合金中σ相的析出,随着Cr含量的增加,σ相析出温度范围、尺寸和析出量增大,析出位置由晶界扩展到晶内。
In order to study the precipitation behavior of σ phase in the corrosion resistant soft magnetic alloy FeCr16, the equilibrium phase transition diagram was calculated by Thermo-Calc. According to the results of thermodynamic calculation, the effect of aging treatment temperature and Cr content on precipitation behavior of σ phase in the corrosion resistant soft magnetic alloy FeCr16 was investigated by means of optical microscope(OM), scanning electron microscope(SEM) and energy dispersive spectroscopy(EDS), and the magnetic properties of the alloy were tested. The thermodynamic calculation results show that when the temperature is lower than 560 ℃, there is precipitation of σ phase in the alloy. The results of heat treatment experiments show that the size and precipitation amount of the σ phase have the maximu values at 500 ℃, and the magnetic induction intensity of the alloy has a minimum value at 500 ℃, so the large amount of precipitation of σ phase will reduce the magnetic properties of the alloy. The segregation of Cr will promote the precipitation of σ phase in the alloy. With the increase of Cr content, the precipitation temperature range, size and quantity of σ phase increase, and the precipitation position extends from the grain boundary to the grain.
作者
胡耕辅
田玉新
朱银存
陆建生
王福明
Hu Gengfu;Tian Yuxin;Zhu Yincun;Lu Jiansheng;Wang Fuming(School of Metallurgical and Engineering,University of Science and Technology Beijing,Bejing 100083,China;Baowu Special Metallurgy Co.,Ltd.,Shanghai 200940,China)
出处
《金属热处理》
CAS
CSCD
北大核心
2022年第8期83-88,共6页
Heat Treatment of Metals
关键词
耐蚀软磁合金FeCr16
热处理
Σ相
磁性能
corrosion resistant soft magnetic alloy FeCr16
heat treatment
σphase
magnetic property
