30Cr1Mo1V转子钢在540℃下的高温疲劳性能  

High-temperature fatigue property of 30Cr1Mo1V rotor steel at 540℃

作　　者：纳日苏 张曰涛 张硕 孟蔚然 王啸 Na Risu;Zhang Yuetao;Zhang Shuo;Meng Weiran;Wang Xiao(CHN Energy Boiler and Pressure Vessel Inspection Co.,Ltd.,Beijing 100070,China;School of Mechanical Engineering,Nantong University,Nantong Jiangsu 226019,China)

机构地区：[1]国能锅炉压力容器检验有限公司,北京100070 [2]南通大学机械工程学院,江苏南通226019

出　　处：《金属热处理》2025年第2期36-42,共7页Heat Treatment of Metals

基　　金：国家能源集团项目(GJ2022Y01);国家自然科学基金(52305156);江苏省青年科技人才托举工程(JSTJ-2024-290)。

摘　　要：以30Cr1Mo1V钢为研究对象,进行了540℃不同应力(450、400、350■0,350■233,350■175 MPa)下的高温疲劳试验。结果表明,当峰值应力超过350 MPa后,30Cr1Mo1V钢的疲劳寿命快速下降。350 MPa应力下,30Cr1Mo1V钢疲劳失效后组织中铁素体未发生明显的变形,保持其原有的多边形状,最终失效特征为疲劳裂纹;当应力上升至400 MPa时,疲劳失效后铁素体组织显著变形,呈弯曲河流状,此时孔洞出现在铁素体条带的交汇处。此外,长期处于高应力水平(350■233、350■175 MPa)不利于30Cr1Mo1V钢的疲劳寿命,这是由于应力持续作用易引起材料内部疲劳孔洞数量显著增加。综上,30Cr1Mo1V钢在540℃/350 MPa服役条件下,相对安全,疲劳寿命为12887次,每次损耗率约为0.00776%,低于标准要求的0.01%。High-temperature fatigue tests were conducted on 30Cr1Mo1V steel under different stresses(450■0,400■0,350■0,350■233,350■175 MPa)at 540℃.The results indicate that the fatigue life of the 30Cr1Mo1V steel decreases rapidly as the peak stress exceeds 350 MPa.Under a stress of 350 MPa,the ferrite does not change too much,which maintains the initial polygon-like shape,and the ultimate failure feature of the steel is fatigue cracking.Nevertheless,when the stress rises to 400 MPa,the ferrite deforms remarkably and shows a wrinkled river-like shape after fatigue failure,meanwhile,the pores also appears at the intersection location of the ferrite bands.In addition,subjecting the long-term high stress level like at 350■233 MPa and 350■175 MPa are harmful to the fatigue life of the 30Cr1Mo1V steel,as continuous stress can significantly increase the number of fatigue pores inside the material.In summary,the 30Cr1Mo1V steel is relatively safe under service conditions of 540℃/350 MPa,with a fatigue life of 12887 cycles,and a one-time attrition rate of approximately 0.00776%which is less than the requirement of 0.01%.

关 键 词：30Cr1Mo1V转子钢 高温疲劳寿命 组织 

分 类 号：TG142.12[一般工业技术—材料科学与工程]