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Ti6Al4V合金表面無氫滲碳層分析
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Analysis of Hydrogen-Free Carburized Coating on Ti6Al4V Substrate
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云南省應(yīng)用基礎(chǔ)研究面上項目(2009CD134，2010CD126)

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    摘要:

    將Ti6Al4V合金試樣置入真空爐中進行無氫滲碳。分別用XRD、SEM、EDS及HV顯微硬度計對滲碳層的物相、組織形貌、成分和硬度進行分析。結(jié)果表明，經(jīng)過滲碳后，滲層中出現(xiàn)TiC相，但是未發(fā)現(xiàn)氫化物及含H相。整個滲碳層由附著層、滲碳層和擴滲層組成。附著層中含有Ti、Al、V元素，附著層的存在阻礙碳的滲入。滲碳層由致密的滲碳層Ⅰ和等軸晶組成的滲碳層Ⅱ組成。擴滲層有碳的滲入，碳含量少，只是一個滲碳影響層。滲層的硬度呈梯度變化，硬度變化曲線是滲層中碳含量變化的反映，硬化層厚度約為900 μm

    Abstract:

    Ti6Al4V alloy specimens were put into a vacuum furnace for hydrogen-free carburization. The phases, microstructure, composition and hardness of the carburized coating were analyzed by XRD, SEM, EDS and HV hardness tester, respectively. Results show that after carburization TiC phase appears in the coating, but no hybrids or H-containing phase are observed. The total carburized coating is composed of accreted layer, carburized layer and diffusion layer. The accreted layer containing Ti, Al and V elements inhibits the permeance of carbon. The carburized layer is composed of dense layer I and equiaxed-crystal-shaped layer II. The diffusion layer has a little carbon, so it is only a carburization-influenced zone. The HV microhardness of the carburized coating has a gradient change. The change of hardness reflects the change of carbon content. The hardened layer is about 900 μm thick

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姬壽長,李爭顯,杜繼紅,王少鵬,王寶云,黃春良,潘曉龍. Ti6Al4V合金表面無氫滲碳層分析[J].稀有金屬材料與工程,2010,39(12):2152~2156.[Ji Shouchang, Li Zhengxian, Du Jihong, Wang Shaopeng, Wang Baoyun, Huang Chunliang, Pan Xiaolong. Analysis of Hydrogen-Free Carburized Coating on Ti6Al4V Substrate[J]. Rare Metal Materials and Engineering,2010,39(12):2152~2156.]
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  • 收稿日期:2010-03-15
  • 最后修改日期:2010-10-26
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