摘要
采用显微硬度计、光学显微镜、X射线衍射仪等手段,对经复合方法及热轧工艺制备的高硅钢薄板(覆层为Fe-3%Si,芯层为Fe-10%Si)进行不同工艺的热处理,研究其软化行为,并通过温轧实验进行验证。结果表明:经850℃保温1 h,采用盐水冷的热处理工艺可使得复合板综合硬度最低;晶粒大小不是高硅钢复合板软化的主要原因;B2相的出现,使得材料的有序度下降,从而造成复合板芯层硬度的降低,同时急冷还可导致材料的芯层出现B20相。经热处理工艺后在720℃下温轧可获得表面质量良好、厚度为0.45 mm的薄板,高温扩散后整体Si元素含量为6.2%。
The effect of different heat treatment processes on the softening behavior of high silicon steel composite plate(coating:Fe-3%Si,core layer:Fe-10% Si),which was prepared by composite method and hot-rolling process,was investigated by means of microhardness tester,optical microscope,X-ray diffraction.And,the process was validated by warm-rolling.The results show that after being annealed at 850 ℃ for 1 h and brine cooled,the overall hardness of the plate is lowest.Grain size of the plate is not the main factor leading to metal soften; it is revealed that the decreasing hardness of the composite plate core layer is caused by the decreasing of the material degree of order,which is caused by the precipitated of B2 phase.Rapid cooling can also result in the precipitated of B20 phase in the plate core layer.The thin composite plate of 0.45 mm with good surface quality is prepared by warm-rolling at 720 ℃ after heat treatment.Finally the silicon content of the composite plate after high temperature diffusion reaches to 6.2%.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2014年第12期160-165,共6页
Transactions of Materials and Heat Treatment
关键词
高硅钢
复合板
热处理
硬度
B2相
high silicon steel
composite plate
heat treatment
hardness
B2 phase
