發(fā)布時(shí)間：2018-01-25 13:28

  本文關(guān)鍵詞： 鈦合金 激光表面鋁合金化 氮化物 抗高溫氧化性能　出處：《材料熱處理學(xué)報(bào)》2015年S2期 　論文類型：期刊論文

【摘要】：為提高鈦合金TC4的室溫力學(xué)性能和抗高溫氧化性能,采用激光表面合金化技術(shù)在鈦合金TC4表面進(jìn)行鋁合金化,氮?dú)庾鳛楸Ｗo(hù)氣體,并對(duì)合金化層的組織結(jié)構(gòu)、硬度、摩擦磨損性能及抗高溫氧化性能進(jìn)行分析測(cè)試。結(jié)果表明,在鈦合金TC4成功制備出由彌散分布的氮化物作為增強(qiáng)相的富鋁合金化層,合金化層厚度約為1 mm,并與基體呈良好的冶金結(jié)合。室溫下測(cè)得的合金化層的平均硬度約為740 HV,平均摩擦系數(shù)為0.28,而基體的硬度約為410 HV,平均摩擦系數(shù)為0.8。靜態(tài)空氣中800℃保溫1000 h的氧化結(jié)果表明,合金化層的氧化產(chǎn)物主要為Al_2O_3和TiO_2以及少量的Al_3Ti_5O_2的混合氧化物,單位面積增重5.16×10~(-3)mg/mm~2,而基體氧化產(chǎn)物主要為TiO_2,單位面積增重為1.821×10~(-1)mg/mm~2。氮化物作為彌散增強(qiáng)相的富鋁合金化試樣的室溫力學(xué)性能和抗高溫氧化性能顯著提高。
[Abstract]:In order to improve the mechanical properties and oxidation resistance of titanium alloy TC4 at room temperature, the laser surface alloying technology was used to make aluminum alloy on the surface of titanium alloy TC4, and nitrogen was used as the protective gas. The microstructure, hardness, friction and wear resistance and oxidation resistance of the alloyed layer were analyzed and tested. The alloy-rich aluminum alloy layer with diffusion distribution of nitride as reinforcement phase was successfully prepared in titanium alloy TC4. The thickness of alloying layer was about 1 mm. The average hardness of alloying layer is about 740 HVV, the average friction coefficient is 0.28, and the hardness of matrix is about 410 HV. The average friction coefficient is 0.8. The oxidation results at 800 鈩，

本文編號(hào)：1462952