| 20SiMn2MoVA钢高强度螺栓裂纹成因分析 |
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| 引用本文： | 刘永飞,刘宏亮,王平怀,王斯玉. 20SiMn2MoVA钢高强度螺栓裂纹成因分析[J]. 理化检验(物理分册), 2019, 55(5): 348-350,355 |
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| 作者姓名： | 刘永飞 刘宏亮 王平怀 王斯玉 |
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| 作者单位： | 中国石油宝鸡石油机械有限责任公司,宝鸡 721002;国家油气钻井装备工程技术研究中心,宝鸡 721002;中国石油宝鸡石油机械有限责任公司,宝鸡 721002;国家油气钻井装备工程技术研究中心,宝鸡 721002;中国石油宝鸡石油机械有限责任公司,宝鸡 721002;国家油气钻井装备工程技术研究中心,宝鸡 721002;中国石油宝鸡石油机械有限责任公司,宝鸡 721002;国家油气钻井装备工程技术研究中心,宝鸡 721002 |
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| 摘 要： | 20SiMn2MoVA钢高强度螺栓磁粉探伤时,发现有多条长短不一的裂纹。采用宏观分析、力学性能试验、化学成分分析、金相检验等方法对裂纹产生的原因进行了分析。结果表明:该高强度螺栓表面存在的裂纹属于锻造折叠缺陷,锻造过程中锻压工艺和变形量不均匀引起锻造流线不畅而形成飞边,最终导致锻造折叠缺陷的产生。
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| 关 键 词： | 20SiMn2MoVA钢 高强度螺栓 裂纹 锻造折叠 锻造流线 飞边 |
Cause Analysis on Cracks of 20SiMn2MoVA Steel High Strength Bolt |
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| LIU Yongfei,LIU Hongliang,WANG Pinghuai,WANG Siyu. Cause Analysis on Cracks of 20SiMn2MoVA Steel High Strength Bolt[J]. Physical Testing and Chemical Analysis Part A:Physical Testing, 2019, 55(5): 348-350,355 |
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| Authors: | LIU Yongfei LIU Hongliang WANG Pinghuai WANG Siyu |
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| Affiliation: | (CNPC Baoji Oilfield Machinery Co., Ltd., Baoji 721002, China;National Engineering Research Center for Oil & Gas Drilling Equipment, Baoji 721002, China) |
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| Abstract: | Several cracks with different lengths were found on the surface of 20SiMn2MoVA steel high strength bolt when magnetic particle inspection.Macroscopic analysis, mechanical properties test,chemical composition analysis and metallographic examination were used to analyze the causes of cracks.The results show that the cracks on the surface of the high strength bolt belonged to forging folding defect.In the forging process,the uneven forging process and deformation caused the forging streamline to be blocked and the edge fin to be formed,which eventually led to the formation of forging folding defects. |
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| Keywords: | 20SiMn2MoVA steel high strength bolt crack forging folding forging streamline edge fin |
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