老化30Cr2MoV汽轮机转子钢电化学性能的研究  

An Experimental Study on the Electrochemistry Performance of 30Cr2MoV Turbine Rotor Steel

作　　者：陈颖敏[1] 张胜寒[1] 李育宏[2] 陈小芹[3] 

机构地区：[1]华北电力大学环境科学与工程学院,保定071003 [2]天津中水有限责任公司,天津300381 [3]南昌大学科技学院,南昌330029

出　　处：《汽轮机技术》2005年第6期477-480,共4页Turbine Technology

摘　　要：实验使用未经老化和老化30Cr2MoV转子钢研究其电化学性能与冷脆转变温度(FATT)的关系,研究材料的电化学参数和机械性能等参数的相关性。国内首次使用苦味酸电解液测定动电位阳极极化曲线研究电化学腐蚀特征,找到临界钝化电流密度和二次活化电流密度作为特征参数分析材料的电化学极化性能,多元线性回归得到测算FATT的模型,它可以评估转子钢老化程度,测算FATT精度在±20℃之内。In this study, virgin and degraded 30Cr2MoV rotor steels were used to investigate the relation of electrochemical performance and the fracture appearance transition temperature and relativity between electrochemical parameter and mechanical properties. The electrochemical corrosion characteristics were investigated by measuring the potentiodynamic anodic polarization curves in the electrolyte of picric acid in China. Using critical current density and the first peak current density as characteristic parameters, electrochemistry performance was analyzed and got the model which calculates FATr by the multiple linear regression analysis. The models could evaluate the aged degree of rotor steel, it is qualified precision which is separately in ±20℃.

关 键 词：汽轮机转子钢 老化 苦昧酸 动电位阳极极化 多元线性回归 

分 类 号：TK236.61[动力工程及工程热物理—动力机械及工程]