Cavitation Resistance of Steam Turbine Blades after Laser Alloying
In order to improve the resistance to cavitation of steam turbine blades (2Cr13 low-carbon martenstic stainless steel), a 7KW continuous wave CO2 laser processing system was used for surface hardening. The microstructures, microhardness and cavitation resistance was studied. The microstructure of surface was refined after laser alloying which was different from the substrate. The average microhardness after laser alloying can achieve 701.2 HV0.2 (substrate material 200～250HV0.2). Residual stress of cross and longitudinal direction was 211.70MPa and 334.60Mpa respectively. The cavitation resistance of the laser alloying steam turbine blades was increased to one time more than that of the original blades, which proved that laser alloying was promising to improve the properties and life time of steam turbine blades.
Laser alloying Cavitation resistance Steam turbine blade Residual stress
Jianhua Yao Liang Wang Chunyan Yu Fanzhi Kong Qunli Zhang Chenghua Lou Jibin Fu
The MOE Key Laboratory of Mechanical manufacture and Automation, Zhejiang University of Technology, 18 Chaowang Road, Hangzhou 310014, Zhejiang, China; Research Center of Laser Processing Technology and Engineering of Zhejiang University of Technology, 18
国际会议
2007杭州国际动力工程会议(The International Conference on Power Engineering 2007)
杭州
英文
2007-10-23（万方平台首次上网日期，不代表论文的发表时间）