30Cr1Mo1V转子钢的蠕变特性  

Creep Characteristics of Rotor Steel 30Cr1Mo1V

作　　者：毛雪平[1] 王罡[1] 马志勇[1] 刘亚雄 

机构地区：[1]电站设备状态监测与控制教育部重点实验室华北电力大学动力工程系,北京102206 [2]广平化工实业有限公司,恩平529400

出　　处：《动力工程》2006年第6期904-907,共4页Power Engineering

基　　金：华北电力大学博士学位教师基金资助

摘　　要：对30Cr1Mo1V转子钢在540℃和565℃下进行了有中断的蠕变试验研究，应力范围为240-320MPa，得到了蠕变过程中损伤因子和蠕变寿命分数之间的关系。通过蠕变试验后试样维氏硬度的检测和蠕变过程中硬度对蠕变断裂性能的影响分析，提出了蠕变断裂Larson-Miller公式的硬度修正公式，并对其有效性进行了检验。结果表明：在Larson-Miller参数值大于18000时，修正值与实际值比较一致；而在小于该值时相差较大。此外，还研究了损伤和Larson-Miller数之间的关系。Intermittent creep tests at 540℃ and 565℃ were conducted with rotor steel 30 Cr1Mo1V in the 240-320 MPa stress range, herewith obtaining the relationship between damage factor and creep life expenditure during a creeping process. A hardness modified Larson-Miller rupture formula has been elaborated by measuring hardness numbers of the samples after creep tests and analyzing the influence of hardness on creep rupture. An examination of the effectiveness of modification of the formula shows that the calculated hardness modified values approach actual test values in case the Larson-Miller parameter exceeds 18000, while failing to do so for smaller parameter values. The relationship between damage incurred and the Larson-Miller number has also been studied.

关 键 词：材料科学 30 Cr1Mo1V钢 蠕变 损伤 寿命 硬度 

分 类 号：TH140.1[一般工业技术—材料科学与工程]