L.Li 1)
,
Z. P.Wang. 2)
,
Z.K.Qu 1)
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D.M.Jia 3) and Z.Jiang 4) 1) Mechanical Engineering College
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Shenyang University
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Shengyang 110044
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China 2) Harbin Research Institute of Welding
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Harbin 150080
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China 3) Information Engineering Collage
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Shenyang University
,
Shengyang 110044
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China 4) Materials Engineering College
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University of Science and Technology Beijing
,
Beijing 100083
,
China
金属学报(英文版)
A novel test method of measuring the interface bond strength between a thermal sprayed coating and substrate is put forward first in this paper. The test method is simple and reliable, and exists no any inherent shortcoming and controversy. The interface bond strength obtained by the test method is completely the inherent property of the interface and depends only on coating material properties, spray conditions, and technique of depositing the coating. By extensive tests, it is shown that the test tesults are very tepeatable and reliable. Furthermore, from this test, the critical coating thickness under which the coating spall can not emerge is also obtained.
关键词:
coating
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R. P. Liu
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Z. J. Dong and Y. H. Wei( 1)Harbin Research Institute of Welding
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Harbin 150080
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China 2)National Key Laboratory of Advanced Welding Production Technology
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HIT
,
Harbin 150001
,
China)
金属学报(英文版)
This paper has analyzed the influences of the heat input of welding arc, the latent heat of solidifica- tion,fluid flow of liquid metal on the heat conductivity pertaining to welding solidification crack of stainless steels. As a result,two - dimensional heat conduction models with prescribed heat flux mov- ing along the the have been developed that can simulate welding arc, convection and radiation heat loss from top and bottom surfaces of the workpiece. Finally, the finite element model was used to ana- lyze and calculate the temperature field.
关键词:
stainless steel
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WU Chuansong
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CAO Zhenning
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WU Lin Harbin Institute of Technology
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Harbin
,
China
金属学报(英文版)
A model is established to analyze three-dimensional fluid flow and heat transfer in TICweld pools with full penetration.It considers the deformation of the molten pool surfaceat the condition of full penetrated workpieees,takes the are pressure as the drivingforce of the pool surface deformation,and determines the surface configuration of weldpool based on the dynamic balance of arc pressure,pool gravity and surface tension atdeformed weld pool surface. The SIMPLER algorithm is used to calculate the fluid flowfield and temperature distribution in TIG weld pools of stainless steel workpieces.TIGwelding experiments are made to verify the validity of the model.It shows the calculatedresults by the model are in good agreement with experimental measurements. professor,Dept of Welding Engineering,Harbin Institute of Technology,Harbin 150006,China
关键词:
KEY WORDS TIG weld pool
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