(1. 同濟(jì)大學(xué) 材料學(xué)院， 上海 200092;
2. 上海市金屬功能材料重點(diǎn)實(shí)驗(yàn)室， 上海 200940；
3. 中南大學(xué) 材料科學(xué)與工程系， 長沙 410083)
摘 要: 以Zn-35%Al合金為研究對象，研究了陶瓷相對鋅鋁基合金激光重熔區(qū)表面硬度的影響。結(jié)果表明：含Al2O3陶瓷表層經(jīng)激光處理后的顯微硬度高于表層不含Al2O3陶瓷直接激光處理的試樣，并在過渡區(qū)出現(xiàn)了第二個(gè)硬度峰值。采用AES，TEM分析發(fā)現(xiàn)，δ Al2O3相的存在是造成這一結(jié)果的主要原因。
關(guān)鍵字: 激光重熔； 金屬基陶瓷復(fù)合； 鋅鋁基合金
remelting area of Zn-Al based alloy
（1. School of Materials Science and Engineering ，
Tongji University， Shanghai 200092, P.R.China;
2. Shanghai Key Lab. for Research & Developing & Applications of
Metallic Functional Materials， Shanghai 200940, P.R.China;
3. Department of Materials Science & Engineering，
Central South University, Changsha 410083, P.R.China）
Abstract:The effect of Al2O3 phase on the microhardness of laser re-melting area of Zn-Al based alloy was studied. The results show that the microhardness of sample contained Al2O3 phase after laser re-melting has higher value than that of treated directly with laser beam. The reason for the occurrence of second hardness peak is the delta aluminum oxide(tetragonal) existing on the transitional area.
Key words: laser remelting; metal matrix composites(MMC); Zn-Al based alloys
