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材料研究学报  2007, Vol. 21 Issue (4): 364-370    
  论文 本期目录 | 过刊浏览 |
硅钢表面激光熔覆高硅涂层对性能的影响
董丹阳  刘常升  张滨  苗隽
引用本文:

董丹阳; 刘常升; 张滨; 苗隽 . 硅钢表面激光熔覆高硅涂层对性能的影响[J]. 材料研究学报, 2007, 21(4): 364-370.

全文: PDF(1262 KB)  
摘要: 用Nd:YAG脉冲激光在低硅钢表面制备激光熔覆高硅涂层,研究了激光熔覆高硅涂层样品的组织和磁性能.结果表明,制备出的激光熔覆高硅涂层组织致密、无气孔和裂纹,且与基体有良好的冶金结合.经激光熔覆后硅钢表面存在熔覆区、界面结合区和热影响区.熔覆区的显微组织不均匀,随着与结合界面距离的增加,由柱状晶变为树枝晶,最终过渡到表层的细小树枝晶组织.熔覆层与基体之间的结合界面为平面晶组织,热影响区为马氏体组织.熔覆涂层的显微硬度远高于低硅钢基体,其主要原因是涂层具有较高的Si含量,涂层中的α-Fe和γ-Fe双相组织也导致了硬度的提高.激光熔覆高硅涂层硅钢样品经扩散退火后具有室温铁磁性,Si含量的提高使其室温直流磁性能优于原始低硅钢.
Key words
收稿日期: 1900-01-01     
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