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Volume 26 Issue 5
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Citation:
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Study on crack control of layer during laser cladding sealing surface of petrochemical valves

  • 1.

    Department of Electrical Engineering, Nanhua University, Hengyang, 421001;

  • 2.

    Institute of Science, National University of Defence Technology, Changsha, 410073;

  • 3.

    Department of Mechanical Engineering, Nanhua University, Hengyang, 421001

  • Received Date: 2001-07-12
    Accepted Date: 2001-12-31
  • This paper investigates laser cladding the sealing surface of high parameter petrochemical valves with 5kW transverse flow CW CO2 laser.The base metal of valves is various,and the cladding powder is CoCrWB or NiCrFeBSi powder.A 2mm～3.5mm thick layer of laser cladding with smooth surface and non flaw can be made,based on solution of crack problem of cladding layer by a single scanning and thick cladding.Various elements and their interaction which influence the formation of crack in laser cladding layer,especially of thick layer,and control of crack are discussed and analyzed according to the experiments.The thought of building a model of stress judgement to judge the formation of crack in cladding layer is put forward.
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    Riabkina-Fishman M. High Temperature Materials and Processes,1996,15:201～205.
    [2] 刘江龙,邹至荣,苏宝镕.高能束热处理.北京:机械工业出版社,1997.
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    Brass M.Laser materials processing.New York: North-Hollond Publishing Company,1983.
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    Anthony T R,Cline H E. J A P,1977,48(9):3888～3893.
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Study on crack control of layer during laser cladding sealing surface of petrochemical valves

  • 1. Department of Electrical Engineering, Nanhua University, Hengyang, 421001;
  • 2. Institute of Science, National University of Defence Technology, Changsha, 410073;
  • 3. Department of Mechanical Engineering, Nanhua University, Hengyang, 421001
  • Received Date: 2001-07-12
  • Accepted Date: 2001-12-31
  • Available Online: 2002-09-25

Abstract: This paper investigates laser cladding the sealing surface of high parameter petrochemical valves with 5kW transverse flow CW CO2 laser.The base metal of valves is various,and the cladding powder is CoCrWB or NiCrFeBSi powder.A 2mm～3.5mm thick layer of laser cladding with smooth surface and non flaw can be made,based on solution of crack problem of cladding layer by a single scanning and thick cladding.Various elements and their interaction which influence the formation of crack in laser cladding layer,especially of thick layer,and control of crack are discussed and analyzed according to the experiments.The thought of building a model of stress judgement to judge the formation of crack in cladding layer is put forward.

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