Study on microstructure of laser cladding Co-base alloy on nuclear valve parts
- Received Date: 1999-10-18
- Accepted Date: 2000-01-21
- Available Online: 2001-03-25
Abstract: Laser cladding of Co-base alloy on the nuclear valve-sealing surface has been performed with a 5kW CO2 flow transverse laser.Optical microscope,SEM,and EDAX have been used to analyze the microstructure,the grain size,the micro-hardness,and the dilution rate.The results show that the microstructure,the grain size,the dilution rate,the width of heat-effect area,and the micro-hardness of the laser cladding coating are much better than those of the spurt welding and the bead welding processing.