| 引用本文: | 尹元德,李胜祗,康永林,王鹏展,王向东,李国涛.工艺参数对二辊斜轧延伸大口径P92厚壁管分层缺陷的影响[J].材料科学与工艺,2014,22(6):123-128.DOI:10.11951/j.issn.1005-0299.20140622. |
| YIN Yuande,LI Shengzhi,KANG Yonglin,WANG Pengzhan,WANG Xiangdong,LI Guotao.Influence of technological parameters on lamination defect of large diameter heavy wall P92 seamless steel pipe elongated by 2-roll rotary rolling process[J].Materials Science and Technology,2014,22(6):123-128.DOI:10.11951/j.issn.1005-0299.20140622. |
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| 工艺参数对二辊斜轧延伸大口径P92厚壁管分层缺陷的影响 |
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尹元德1,李胜祗1,康永林2,王鹏展3,王向东3,李国涛3
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(1.安徽工业大学 材料科学与工程学院,安徽 马鞍山 243000;2. 北京科技大学 材料科学与工程学院, 北京100083;3. 扬州诚德钢管有限公司 技术中心,江苏 扬州225200)
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| 摘要: |
| 针对二辊斜轧延伸485 mm×73 mm大口径厚壁P92(9Cr-0.5Mo-1.8WVNb)无缝钢管频繁发生的分层缺陷,采用3D热力耦合模拟和Oyane韧性断裂准则,对斜轧延伸过程中轧件的应力应变和损伤特征场的分布特点进行了分析,并系统地研究了不同工艺参数对分层缺陷形成倾向性的交互影响规律. 提出了减轻或避免分层缺陷的有效措施,并对穿孔工艺参数进行了优化. 研究结果表明,轧件最大损伤特征值随轧辊转速的降低、送进角、轧辊入口锥角和管坯通孔直径的增大而减小,轧件发生分层缺陷的倾向性降低. 轧件的最大损伤特征值由工艺优化前的0.377 9降至优化后的0.285 7. 现场生产探伤数据对模拟结果进行了验证,采用优化后的工艺参数所生产的钢管成品合格率从原来的88.9%提高到97.2%. |
| 关键词: 大口径P92厚壁管 工艺参数 二辊斜轧延伸 分层缺陷 数值模拟 |
| DOI：10.11951/j.issn.1005-0299.20140622 |
| 分类号:TG335.1 |
| 基金项目:江苏省重大创新项目(BA2008084). |
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| Influence of technological parameters on lamination defect of large diameter heavy wall P92 seamless steel pipe elongated by 2-roll rotary rolling process |
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YIN Yuande1, LI Shengzhi1, KANG Yonglin2, WANG Pengzhan3,WANG Xiangdong3, LI Guotao3
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(1.School of Materials Science and Engineering, Anhui University of Technology, Maanshan 243002, China; 2.School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China; 3.Technology Center, Yangzhou Chengde Steel Pipe Co. Ltd., Yangzhou 225200, China)
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| Abstract: |
| To investigate lamination defects frequently happened during two-high cross piercing elongating process of large diameter heavy wall seamless P92 (9Cr-0.5Mo-1.8WVNb) steel pipe with 485 mm×73 mm, 3D thermo-mechanical simulations have been carried out, and the distribution characteristics of stress/strain and damage field of the rolling piece during the elongating process are analyzed using Oyane ductile fracture criterion. Furthermore the interaction influence laws of different technological parameters on tendency of lamination defect are systematically investigated. Accordingly the effective measures are put forward to prevent or reduce lamination defects, and the technological parameters of cross piercing are optimized. The results show that the maximal damage characteristic value of rolling piece decreases with the decrease of roll rotational speed, the increase of feed angle, roll entrance cone angle and via diameter of round billet, and the tendency of lamination defect reduces. The maximal damage characteristic value of rolling piece decreases from 0.377 9 before technological parameter optimized to 0.285 7 after optimized, and simulation results have been verified by the inspection data from practical production. Using the optimized technological parameters, the qualified rate of product has been raised from 88.9% to 97.2%. |
| Key words: large diameter heavy wall P92 pipe technological parameter two-roll rotary elongating lamination defect numerical simulation |
