45钢表层渗铝性能分析
Property Analysis of Aluminizing Coating on 45 Steel Surface
宋海潮, 杨红科, 滕宏春
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作者单位：(南京工业职业技术学院, 江苏 南京 210046)
中文关键字：渗铝； 微观结构； 性能分析； 45钢
英文关键字：aluminizing; microstructure; property analysis; 45 steel
中文摘要：对45钢表面进行渗铝及退火处理，借助金相显微镜、能谱分析和硬度测量研究其性能变化，发现表面渗铝层退火处理前为径向生长的等轴晶，与基体有清晰分界；退火后，Fe原子扩散进入渗层，Al原子也向基体扩散，形成新的合金扩散层。退火前渗铝层硬度大于基体，退火后渗层硬度下降。
英文摘要：Property change of aluminizing coating on 45 steel before and after annealing was investigated by metallurgical microscope, EDS and hardness measurer. The results indicate that the aluminizing coating is the equiaxed crystal of radial direction, which has the clear boundary line with matrix before annealing treatment. There is new alloy dispersion layer after annealing treatment for Fe diffusing into coating and Al diffusing into non-metals. The hardness of the aluminizing coating is bigger than the matrix before annealing treatment, but it decreases after annealing treatment.