Comparison of 30Cr2Ni4MoV Rotor Steel with Different Treatments on Corrosion Resistance in High Temperature Water
(0) Three different treatments, including heat treatment, deep cryogenic treatment and laser surface melting, were carried out on 30Cr2Ni4MoV rotor steel. Electrochemical polarization curve and stress corrosion test at high temperature autoclave were applied to evaluate the corrosion resistance of treated specimens in high temperature water. Results indicate that conventional heat treated specimens with a lower yield strength will increase the value of KIH, and thus reduce the stress corrosion cracking susceptivity. However, no apparent improvement was obtained on the hardness and corrosion resistance due to the limited carbon precipitate and austenite transformation after the deep cryogenic treatment of 30Cr2Ni4MoV rotor steel. In comparison, the best corrosion resistance of laser treated specimens was gained among the three-method-treated specimens by using the electrochemical polarization tests at temperature of 90oC. Nevertheless, some micro-cracks produced on the tensioned surface during the fabrication of self-loaded U bend specimen, and thus lead to a decreased stress corrosion cracking resistance in the environment of high temperature water.
High temperature water Corrosion resistance Heat treatment Deep cryogenic treatment Laser surface melting
Fu-Zhen Xuan Xiaoqing Huang Shan-Tung Tu
School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai 200237, China
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）