ZL104铝合金等离子表面重熔处理  

Plasma Surface Remelting Treatment of ZL104 Aluminum Alloy

作　　者：潘璋[1] 董选普[1] 黄齐文[1] 

机构地区：[1]华中科技大学材料成形与模具技术国家重点实验室,湖北武汉430074

出　　处：《铸造》2012年第3期262-265,共4页Foundry

摘　　要：通过对ZL104铝合金表面进行高能束等离子表面改性处理，获得了铝合金表面重熔层组织。采用JTJSEM、EDS、显微硬度等测试方法，对处理后的ZL104铝合金微观结构和硬度进行了研究。结果表明，经过等离子重熔后，铝合金表面重熔层由两部分组成：底部靠近基体界面处的组织为定向生长的胞状晶，顶部为自由生长的胞状晶。表面重熔层晶粒明显细化，晶粒尺寸细化至基体材料的1／10左右，且重熔层的α-Al固熔体中的硅含量呈过饱和状态，重熔层的显微硬度相对于基体材料提高了HV30～50。The surface remelting structure was obtained by high energy plasma surface remelting treatment to ZL104 aluminum alloy in this paper. The microstructure and hardness of ZL104 aluminum alloy were studied by using SEM, EDS and microhardness tester. The result shows that the surface remelted layers consist of two parts： directional cellular crystal layer near the interface with matrix on the bottom of the layer and free growing cellular crystal layer on the top of layer. The grain size of the remelted layer was highly refined to about ten percent of the matrix while the amount of Si in α-Al solid solution remained supersaturation state. And the microhardness may be increased by HV 30 to 50 than the matrix.

关 键 词：铝硅合金 等离子表面重熔 晶粒细化 

分 类 号：TG174.4[金属学及工艺—金属表面处理]