铸渗法制备铜基表面复合材料

SURFACE COMPOSITE ON THE COPPER SUBSTRATE FABRICATED BY INFILTRATION CASTING

利用铸渗法对铜合金表面进行改性,用Fe基合金粉末作为渗剂在负压条件下进行浇注制备铜基表面复合材料。实验结果表明:在本实验工艺条件下,在铜合金铸件的特定表面获得了致密的组织结构不同于基体的渗层———表面复合材料层。经SEM观察,发现渗剂颗粒与基体的界面结合良好,证实了铸渗法制备铜基表面复合材料的可行性。

The surface of copper alloy was modified using infiltration casting. Fe-based alloy powder was used as infiltrated agent under the condition of negative pressure to form the infiltrated layer on the surface of copper cast. The experimental results show that the surface composites of copper matrix are obtained under the present condition, whose structure is different from that of the substrate. The SEM shows that the interface between the base metal and the penetrated layer contains no exist holes and the structure is compact. Infiltration casting is feasible to fabricate the surface composite of a copper substrate.