Influencing Factors Analysis of the Crack on Laser Cladding of Valve Sealing Surface
Thick laser coating on sealing surface of high parameter nuclear and chemical valve have been made, And the factors that will influence layers cracking behavior have been analyzed including laser cladding material, technology and base metal. It is approved by experiment that the greater the energy ratio is, the lower the possibility of cracking would be. But this case may cause diluting rate of the coat increasing, grains coarsening and hardness reducing. B and Si can create hard phase, reduce coatings plasticity, and generate segregation easily in Ni-base alloy which may cause crystal crack. The rate of coating cracking will reduce when substrate has homogeneous structure, no relict stress, no defect, good plasticity, and, its rate of heat expansion is a bit higher than clad material, heat capacity is small, shape and structure is simple and heat symmetrical characteristic is good.
Laser cladding Coat crack Cladding material Cladding technology Influencing factors
G.Y.Fu S.H.Shi
School of Mechanic & Electric Engineering,Soochow University,Suzhou,Jiangsu 215021
国际会议
常州
英文
705-708
2009-11-19（万方平台首次上网日期，不代表论文的发表时间）