通过万能试验机、疲劳试验机、扫描电镜等设备研究了三种不同显微组织套管钻井用钢的拉伸性能和疲劳裂纹扩展性能，并建立了不同参数之间的定量关系。结果表明：回火马氏体钢的抗拉强度和屈服强度显著高于珠光体-铁素体钢的和铁素体-贝氏体-回火马氏体钢的；珠光体-铁素体钢的Paris常数
m最大、
C最小，回火马氏体钢的Paris常数
m最小、
C最大；对于具有相同或相近成分的钢来说，Paris常数
m随着屈服强度的增大而显著减小，Paris常数
C随着伸长率的增加而显著减小；不同钢的Paris常数
C随着Paris常数
m的减小而增大；当通过热处理使得钢的拉伸性能提高到一定程度时，必须通过改变其成分来获得良好的综合性能。
所属栏目
试验研究国家“863”计划项目（2006AA06A107）；陕西省教育厅科学研究计划项目（2016JK1593）；西安石油大学材料加工工程重点学科专项资金资助项目（YS32030203）
收稿日期
2017/2/272017/7/13
作者单位
许天旱:西安石油大学材料科学与工程学院, 西安 710065
王党会:西安石油大学材料科学与工程学院, 西安 710065
备注
许天旱(1971-),男,陕西咸阳人,副教授,博士
引用该论文:
XU Tianhan,WANG Danghui.Tensile Property and Fatigue Crack Growth Property of Casing-Drilling Steels with Different Microstructures[J].Materials for mechancial engineering,2017,41(9):19～24
许天旱,王党会.不同显微组织套管钻井用钢的拉伸性能与疲劳裂纹扩展性能[J].机械工程材料,2017,41(9):19～24
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