调质处理对CT80连续油管用钢应变疲劳行为的影响
Effect of Quenching and Tempering on Strain-Fatigue Behavior of CT80 Grade Coiled Tube Steel
摘 要
对CT80连续油管用钢分别进行950 ℃淬火和550 ℃或650 ℃回火的调质热处理; 通过轴向低循环疲劳试验, 对比了不同调质工艺处理后试验钢的疲劳性能, 并对断口形貌进行分析。结果表明: 淬火温度950 ℃、回火温度650 ℃的调质处理工艺能够有效地提高CT80连续油管用钢疲劳性能; 其疲劳裂纹起源于试样表面, 且呈多源性特征。
CT80连续油管用钢
应变疲劳
断口形貌
quenching and tempering
CT80 grade coiled tube steel
strain-fatigue
fracture morphology
Abstract
The specimens of CT80 grade coiled tube steel were treated at 950 ℃ quenching+550 ℃ tempering, and 950 ℃ quenching+650 ℃ tempering, respectively. By tests of axial low cycle fatigue, the fatigue properties of samples after different processes of quenching and tempering were compared. And the fracture morphology was analyzed. The results show that the processing techniques of 950 ℃ quenching and 650 ℃ tempering can improve the fatigue property of CT80 steel effectively. The fatigue cracks originated from the sample surface and had multi-fatigue source characteristic.
中图分类号 TG111.8 TG113.25
所属栏目 材料性能及其应用
基金项目
收稿日期 2012/3/22
修改稿日期 2013/1/6
网络出版日期
作者单位点击查看
备注王鑫(1986-), 男, 安徽六安人, 硕士研究生。
引用该论文: WANG Xin,RAO Tian-rong,ZHU Tao,HE Yi-zhu. Effect of Quenching and Tempering on Strain-Fatigue Behavior of CT80 Grade Coiled Tube Steel[J]. Materials for mechancial engineering, 2013, 37(7): 58～63
王鑫,饶添荣,朱涛,何宜柱. 调质处理对CT80连续油管用钢应变疲劳行为的影响[J]. 机械工程材料, 2013, 37(7): 58～63
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参考文献
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【4】American Petroleum Institute. API Specification 5CT[S].2005: 13-14.
【5】VOSIKOVSKY O. Fatigue crack closure in an X70 steel[J].International Journal of Fracture, 1981, 17(3): 301-309.
【6】ZHONG Y, XIAO F R, SHAN Y Y. Effect of toughness on low cycle fatigue behavior pipeline steels[J].Material Letters, 2005, 59(14): 1780-1784.
【7】武威, 李洋, 吉玲康, 等. 管线钢疲劳行为研究进展[J].焊管, 2009, 32(8): 31-34.
【8】KIM Y P, KIM C M, KIM W S, et al. Near-threshold fatigue crack growth behavior and crack closure of natural gas pipeline steels[J].Procedia Engineering, 2011, 10: 813-820.
【9】TSAY L W, CHEN Y C, CHAN S L I. Sulfide stress corrosion cracking and fatigue crack growth of welded TMCP API 5L X65 pipe-line steel[J]. International Journal of Fatigue, 2001, 23: 103-113.
【10】NIP K H, GARDNER L, DAVIES C M, et al. Extremely low cycle fatigue tests on structural carbon steel and stainless steel[J].Journal of Constructional Steel Research, 2010, 66(1): 96-110.
【11】戈康达. 金属的疲劳与断裂[M].颜鸣皋, 刘才穆, 译. 上海: 科学技术出版社, 1983: 45.
【12】GILLIS P P. Manson-Coffin fatigue[J].Acta Metallurgica, 1966, 14(12): 1673-1676.
【13】NIESLONY A, DSOKI C, KAUFMANN H, et al. New method for evaluation of the Manson-Coffin-Basquin and Ramberg-Osgood equations with respect to compatibility[J].International Journal of Fatigue, 2008, 13(10/11): 1967-1977.
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