乔虹,李庆棠,符寒光,雷永平

• 1:北京工业大学材料科学与工程学院

摘要(Abstract)：

利用6 kW光纤激光器在Cr12MoV模具钢表面激光熔覆Fe-Cr-B合金涂层。运用金相显微镜和显微硬度仪,研究了激光功率、扫描速度、送粉率对熔覆层成形、尺寸、稀释率及组织结构和微观硬度的影响。结果表明:熔覆层组织主要由平面晶、树枝晶和等轴晶构成。理想的工艺参数为激光功率(P)2000 W,扫描速度(V1)4 mm/s,送粉率(V2)15 g/min。该工艺参数下熔覆层晶粒细小,与基体呈现良好冶金结合,稀释率为9.8%,熔覆层显微硬度平均高达1000 HV。

关键词(KeyWords)： 激光熔覆;Fe-Cr-B合金;工艺参数;显微组织;硬度

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51274016);; 北京市教委(KM201310005003)项目

作者(Author): 乔虹,李庆棠,符寒光,雷永平

DOI: 10.13289/j.issn.1009-6264.2014.02.030

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