东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2009, Vol. 30 ›› Issue (1): 79-82.DOI: -

• 论著 • 上一篇    下一篇

铜合金表面添加SiC晶须的Ni-Cu激光熔覆层

董江;刘芳;陈岁元;刘常升;   

  1. 东北大学材料各向异性与织构教育部重点实验室;大连交通大学材料学院;
  • 收稿日期:2013-06-22 修回日期:2013-06-22 出版日期:2009-01-15 发布日期:2013-06-22
  • 通讯作者: Dong, J.
  • 作者简介:-
  • 基金资助:
    国家自然科学基金与上海宝钢集团联合资助项目(50574020);;

Preparation of SiC whiskers pre-added Ni-based cladding on Cu alloy surface by laser deposition

Dong, Jiang (1); Liu, Fang (2); Chen, Sui-Yuan (1); Liu, Chang-Sheng (1)   

  1. (1) Key Laboratory for Anisotropy and Texture of Materials, Northeastern University, Shenyang 110004, China; (2) School of Materials, Dalian Jiaotong University, Dalian 116028, China
  • Received:2013-06-22 Revised:2013-06-22 Online:2009-01-15 Published:2013-06-22
  • Contact: Dong, J.
  • About author:-
  • Supported by:
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摘要： 用5 kW CO2激光器,通过优化激光工艺参数,在结晶器用铜合金表面预置添加SiC晶须的镍基自熔合金(Ni1015)粉,制备出表面平整、组织均匀致密、无气孔和裂纹等缺陷、与基体为冶金结合的Ni-Cu激光熔覆层.借助OM,SEM和显微硬度计等分析测定了涂层的显微组织形貌、组织成分和截面显微硬度.结果表明:添加SiC晶须的Ni-Cu涂层比单纯的Ni-Cu涂层的显微组织明显得到细化,涂层的显微硬度高出150HV左右,是铜合金基体(85 HV)的3.7倍,从而能够提高结晶器的使用性能.

关键词: 铜, CO2激光器, Ni-Cu激光熔覆层, SiC晶须

Abstract: To prepare the SiC whiskers pre-added wear-resistant Ni-based cladding on copper alloy substrate for mold making, a 5 kW continuous wave CO2 laser was used with the deposition process parameters optimized. A Ni-Cu based cladding was thus deposited, where the powdered Ni1015 was provided for the laser cladding process to form a smooth surface layer bonded metallurgically with Cu substrate, whose grain-refining microstructure is homogeneous, compact, void-free and crack-free. Tested by OM, SEM and micro Vickers, the results showed that the layer's average microhardness is 150 HV higher than no-SiC cladding, about 3.7 times as high as that of Cu substrate (85 HV). Thus, the properties of the mold made from such a Cu alloy can be greatly improved when used in continuous casting.

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