| JCOE成型的X80输油钢管开裂分析 |
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| 引用本文： | 杜伟,娄琦,常荣玲.JCOE成型的X80输油钢管开裂分析[J].理化检验(物理分册),2010(11):715-718. |
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| 作者姓名： | 杜伟 娄琦 常荣玲 |
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| 作者单位： | [1]中国石油天然气管材研究所,西安710065 [2]渤海装备公司巨龙钢管有限公司,河北青县062650 |
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| 摘 要： | 在JCOE成型过程中一根X80输油钢管母材发生纵向开裂,裂纹长度达到了700 mm。通过化学成分分析、力学性能测试、断口分析及金相检验等方法分析了钢管的开裂原因。结果表明:大尺寸外来非金属夹杂物的存在导致了钢板在连铸或轧制过程中产生裂纹。而较低的断裂韧度为裂纹进一步扩展创造了条件,在成型拉应力的作用下微裂纹扩展并延伸。
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| 关 键 词： | X80输油钢管 JCOE成型 开裂 非金属夹杂物 |
Cracking Analysis on X80 Steel Oil Pipe during JCOE Forming |
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| DU Wei,LOU Qi,CHANG Rong-ling.Cracking Analysis on X80 Steel Oil Pipe during JCOE Forming[J].Physical Testing and Chemical Analysis Part A:Physical Testing,2010(11):715-718. |
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| Authors: | DU Wei LOU Qi CHANG Rong-ling |
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| Affiliation: | 1.Tubular Goods Research Center of CNPC,Xi＇an 710065,China; 2.Julong Steel Pipe Co.,Ltd.,Qingxian Hebei 062650,China) |
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| Abstract: | One X80 steel oil pipe experienced longitudinal cracking during JCOE forming,and the crack length was getting up to 700 mm.The cracking reason was analyzed by means of chemical composition analysis, mechanical properties testing,fracture analysis and metallographic examination.The results showed that the primal crack resulted in pipe cracking during forming,and steel plate near the crack possessed low fracture toughness, which accelerated crack propagating under tension stress of forming.The existence of non-metal inclusions of big size was responsible for the generation of primal crack. |
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| Keywords: | X80 steel oil pipe JCOE forming cracking non-metal inclusions |
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