将X70大变形管线钢管冷弯加工后进行不同温度时效处理,利用拉伸试验机和金相显微镜对其拉伸性能及显微组织开展研究.结果表明:230℃和250℃时效后,应力应变曲线出现屈服平台;时效后显微组织仍为铁素体+贝氏体(F+B),随时效温度上升,析出碳化物增多,材料屈强比增大,最高为0.93,应力比Rt1.5/Rt0.5减小,最低为1.01,均匀变形伸长率减小,最低为6.52％;受拉伸应变部位与受压缩应变部位相比,性能改变更明显,说明应变状态是影响应变时效后性能的主要因素;应变时效降低冷弯管塑性变形能力,综合涂覆效率及安全服役因素,防腐涂覆温度应在200℃左右为宜.
参考文献
| [1] | Hiroshi Yatabe;Naoki Fukuda;Tomoki Masuda;Masao Toyoda .Effect of Material Stress-Strain Behavior and Pipe Geometry on the Deformability of High-Grade Pipelines[J].Journal of offshore mechanics and arctic engineering,2004(1):113-119. |
| [2] | Mauro G;Jan F;Ettore A.High strength linepipes with enhanced deformability[A].The International Society of Offshore and Polar Engineers,2008:2955-2962. |
| [3] | ISHIKAWA Nobuyuki;SHIKANAI Nobuo;KONDO Joe .Development of Ultra-High Strength Linepipes with Dual-Phase Microstructure for High Strain Application[J].JFE technical report,2008(12):15-19. |
| [4] | Hillenbrand H G;Kalwa C;Schr(o)der J.Challenges to a pipe manufacturer driven by worldwide pipe projects[A].San Francisco,2011-5-19:1-12. |
| [5] | 王伟 .高性能管线钢的组织及强韧化机理研究[D].中国科学院金属研究所,2009. |
| [6] | 聂文金,尚成嘉,关海龙,张晓兵,陈少慧.铁素体/贝氏体（F/B）双相钢组织调控及其抗变形行为分析[J].金属学报,2012(03):298-306. |
| [7] | 屈德强,吉玲康,陈宏远,蒙敏然.X70大变形钢管应变时效影响研究[J].化工设备与管道,2011(02):51-56. |
| [8] | Shinmiya T;Ishikawa N;Okatsu M.Development of high deformability linepipe with resistance to strain age hardening by heat treatment on-line process[A].The International Society of Offshore and Polar Engineers,2008:308-313. |
| [9] | Tsuru E;Shinohara Y;Asahi H.Strain capacity of line pipe with yield point elongation[A].Seoul,Korea,2007-6-24:487-494. |
| [10] | 吉玲康,李鹤林,赵文轸,王海涛,陈宏远,李洋.X70抗大变形管线钢管的组织结构和形变硬化性能分析[J].西安交通大学学报,2012(09):108-113. |
| [11] | 俞汉青.金属塑性成形原理[M].北京:机械工业出版社,2006:87-88. |
| [12] | 齐丽华,牛靖,杨龙,冯耀荣,吉林康,熊庆人,张建勋.X100级高强度管线钢的应变时效行为[J].材料热处理学报,2011(02):65-69. |
| [13] | 赵志业.金属塑性变形与轧制理论[M].北京:冶金工业出版社,1980:45. |
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