两种套管钻井用钢的显微组织和力学性能
Microstructure and Mechanical Properties of Two Steels for Casing Drilling
摘 要
采用光学显微镜、扫描电镜、拉伸试验机、疲劳试验机等研究了套管钻井用钢N80和K55的显微组织和力学性能,并进行了对比.结果表明:N80钢显微组织主要由回火索氏体、铁素体及少量上贝氏体构成,K55钢显微组织主要由珠光体和网状铁素体构成;N80钢的抗拉强度与K55钢差别不大,但屈服强度比K55钢高约40%,而且N80钢的拉伸断口韧窝更细小,更均匀,但伸长率低于K55钢的;应力比对N80钢裂纹扩展速率的影响显著小于对K55钢的影响,N80钢的KIC比K55钢的更大;因此,N80钢具有更好的综合力学性能.
K55钢
N80钢
显微组织
力学性能
casing drilling
K55 steel
N80 steel
microstructure
mechanical property
Abstract
By means of optical microscopy,SEM,tensile testing machine and fatigue testing machine,the microstructure and mechanical properties of N80 and K55 steels for casing drilling were studied and compared.The results show that the microstructure of N80 steel consisted of tempered sorbite,ferrite and a small amount of upper bainite,the microstructure of K55 steel mainly consisted of pearlite and netlike ferrite.There was little difference in tensile strength between the N80 and K55 steels,but the yield strength of N80 steel was 40% higher than that of K55 steel.The tensile fracture dimple of N80 steel was finer and more homogeneous than that of K55 steel,but the elongation of N80 steel was lower than that of K55 steel.The effect of the stress ratio on fatigue crack growth rate of N80 steel was much less than on that of K55 steel,and KIC of N80 steel was higher than that of K55 steel.So the comprehensive mechanical properties of N80 steel was better than those of K55 steel.
中图分类号 TG115.5
所属栏目 材料性能及其应用
基金项目 中国石油天然气集团公司石油管力学和环境行为重点试验室探索及预研基金资助项目(H07175)
收稿日期 2009/1/8
修改稿日期 2009/9/26
网络出版日期
作者单位点击查看
备注许天旱(1971-),男,陕西礼泉人,讲师,博士研究生.
引用该论文: XU Tian-han,FENG Yao-rong,SONG Sheng-yin,JIN Zhi-hao,WANG Dang-hui. Microstructure and Mechanical Properties of Two Steels for Casing Drilling[J]. Materials for mechancial engineering, 2010, 34(1): 72～76
许天旱,冯耀荣,宋生印,金志浩,王党会. 两种套管钻井用钢的显微组织和力学性能[J]. 机械工程材料, 2010, 34(1): 72～76
被引情况:
【1】王霞,张仁勇,上官昌淮,陈勇彬, "两种套管钢在含CO2模拟油田地层水中的腐蚀行为",机械工程材料 37, 69-72(2013)
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参考文献
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【2】SHEPARD S F,REILEY R H,WARREN T M.Casting drilling:an emerging technology[C]//Proceedings of the Drilling Conference.[s.l]:[s.n]2001.
【3】杨龙,宋生印,韩新利,等.油气井套管技术现状及发展方向[J].石油矿场机械,2005,34(3):20-26.
【4】陈维荣,黄涛.国外套管钻井技术的发展和现状[J].石油钻探技术,2002,30(1):16-18.
【5】袁光杰,姚振强,林元华,等.套管钻井中套管疲劳实效问题的研究[J].天然气工业,2003,23(5):56-58.
【6】严玲,王长顺,董恩龙,等.V-N微合金化生产非调质N80石油管[J].钢铁钒钛,2003,24(3):60-63.
【7】牛靖,董俊明,薛锦.石油套管钢N80的显微组织分析[J].焊管,2002,25(1):15-17.
【8】ZHAO J,MIYASHITA Y,MUTOH Y.Fatigue crack growth behavior of 95Pb-5Sn solder under various stress ratios and frequencies[J].International Journal of Fatigue,2000,22:665-673.
【9】ELBER W.The significance of fatigue crack closure[C]//Damage Tolerance in Aircraft Structure:Special Technical Publication 486.Philadelphia:American Society for Testing and Material,1971:230-242.
【10】DONALD R A,PRADEEP P P.Essentials of materials science and engineering[M].Beijing:Tsinghua University Press,2006:177-206.
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