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a numerical study on metallic powder flow in coaxial laser cladding
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نویسنده
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liu h. ,hao j. b. ,yu g. ,yang h. f. ,wang l. w. ,han z. t.
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منبع
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journal of applied fluid mechanics - 2016 - دوره : 9 - شماره : 5 - صفحه:2247 -2256
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چکیده
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In coaxial laser cladding, the quality and property of deposition products are greatly influenced by the powder flow, which is responsible to transport additive materials to the deposition point on a substrate precisely. the metallic powder flow in coaxial laser cladding is simulated by a numerical model based on the gas-solid flow theory. the characteristics of powder concentration distribution between coaxial nozzle and deposition point for a kind of nickel based alloy powder are studied by the proposed model. the relationship between the process parameters and powder flow characteristics, such as focus distance from the nozzle exit and maximum powder concentration, is analyzed to optimize the powder feeding process. in addition, the influence of substrate with different surface shapes on the powder flow is investigated. the results can be used as a guideline for the location of the substrate and the selection of proper processing parameters for coaxial laser cladding.
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کلیدواژه
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coaxial laser cladding ,gassolid flow ,powder concentration distribution ,substrate shape.
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آدرس
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china university of mining and technology, school of mechanical and electrical engineering, jiangsu key laboratory of mine mechanical and electrical equipment, china, china university of mining and technology, school of mechanical and electrical engineering, china, institute of mechanics, chinese academy of science, key laboratory of mechanics in advanced manufacturing, china, china university of mining and technology, school of mechanical and electrical engineering, china, beijing jiaotong university, school of civil engineering, china, china university of mining and technology, school of mechanical and electrical engineering, china
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پست الکترونیکی
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jdjxcumt@163.com
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Authors
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