| Hot spray technology of TA7 titanium alloy coated by molybdenum and its bonding strength |
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| 作者姓名： | 李晓泉 杜则裕 杨旭光 |
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| 作者单位： | [1]School of Materials Science and Engineering, Tianjin University, Tianjin, 300072 [2]School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212003 |
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| 摘 要： | A kind of surface modification test was introduced, by which plasma spray in argon atmosphere with CNC4500 system was applied for TA7 titanium alloy to be coated with molybdenum, and technology to produce metallurgical bonding at interface of coating and base meal was tested by heating in vacuum condition for diffusion after hot spray. With the help of scan electron microscope analysis （SEM）, the effect of argon inlet pressure and heating temperature on coating structure as well as product of diffusion layer were studied. The glued tensile test method was used to measure bonding strength of base metal to coating. The result has shown that both argon inlet pressure and heating temperature exert some effect on coating structure and the width of diffusion layer. A bonding strength of base metal to coating which is greater than molybdenum coating itself may be attained and can be controlled in more than 50 MPa level with tested hot spray technology.
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| 关 键 词： | 钛合金 热喷涂 钼 粘结强度 SEM |
Hot spray technology of TA7 titanium alloy coated by molybdenum and its bonding strength |
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| Li Xiaoquan,Du Zeyu,Yang Xuguang.Hot spray technology of TA7 titanium alloy coated by molybdenum and its bonding strength[J].China Welding,2006,15(3):20-23. |
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| Authors: | Li Xiaoquan Du Zeyu Yang Xuguang |
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| Affiliation: | 1. School of Materials Science and Engineering, Tianjin University, Tianjin, 300072
2. School of Materials Science and Engineering, Jiangsu University of Science and Technology,Zhenjiang, 212003 |
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| Abstract: | A kind of surface modification test was introduced, by which plasma spray in argon atmosphere with CNC4500 system was applied for TA7 titanium alloy to be coated with molybdenum, and technology to produce metallurgical bonding at interface of coating and base meal was tested by heating in vacuum condition for diffusion after hot spray.With the help of scan electron microscope analysis ( SEM) , the effect of argon inlet pressure and heating temperature on coating structure as well as product of diffusion layer were studied.The glued tensile test method was used to measure bonding strength of base metal to coating.The result has shown that both argon inlet pressure and heating temperature exert some effect on coating structure and the width of diffusion layer.A bonding strength of base metal to coating which is greater than molybdenum coating itself may be attained and can be controlled in more than 50 MPa level with tested hot spray technology. |
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| Keywords: | titanium alloys hot spray molybdenum metal |
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