| 摘要: |
| 针对煤矿机械用屈服强度900 MPa级高强钢板焊接工艺特点,研究了该钢材焊接热影响区组织转变规律、焊接冷裂纹敏感性及焊接工艺参数对焊接接头组织性能的影响。结果表明,SHT900D钢有较强的淬硬倾向,焊接过程中应采取必要的措施防止焊接冷裂纹的产生;焊接工艺参数对焊接接头组织和性能均有一定的影响,为确保焊接质量,应合理控制焊接热输入量及焊道间温度。研究成果已成功应用于高端液压支架的焊接。 |
| 关键词: 900MPa 高强度钢 焊接工艺 液压支架 |
| DOI： |
| 分类号: |
| 基金项目: |
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| Welding of high strength steel with yield strength of 900 Mpa |
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GAO Youjin1,2, WANG Cheng1, XU Zhonglin2
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1.School of Hydropower Information Engineering, Huazhong University of Soience and Technology, Wuhan 430074, China;2.Zhengzhou Coal Mining Machinery Co. Ltd, Zhengzhou 450013, China
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| Abstract: |
| According to the characteristics of steel with yield strength of 900 MPa used in advanced hydraulic support, the microstructure and hardness of heat affected zone (HAZ), hydrogen assistant cracking susceptibility and influence of welding parameters on microstructure and mechanical properties of welded joint were investigated. The results show that the HAZ of SHT900D steel has stronger hard quenching tendency, proper measures must be taken to prevent hydrogen assistant cracking.Welding parametens have a certain influence on the microstructure and mechanical properties of welded joint, and heat input and interpass temperature should be controlled properly to obtain a desired welded joint.The welding procedure determined by this test had been used in welding production of advanced hydraulic support successfully. |
| Key words: 900 MPa high tensile strength steel welding procedure hydraulic support |
