| 4140钢弯壳体断裂原因分析和改进措施 |
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| 引用本文： | 王锦永,齐希伦,曹洪波.4140钢弯壳体断裂原因分析和改进措施[J].金属热处理,2020,45(9):240-243. |
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| 作者姓名： | 王锦永 齐希伦 曹洪波 |
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| 作者单位： | 邯郸新兴特种管材有限公司,河北 邯郸 056300 |
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| 摘 要： | 某钻具厂生产的一个批次的4140钢螺杆钻具弯壳体出现较多断裂。通过化学成分、力学性能和显微组织分析对失效弯壳体断裂原因进行了研究,并相应优化了热处理工艺。结果表明:弯壳体失效断裂主要原因是由于淬火过程中未淬透,导致显微组织存在大量条状和块状铁素体,未淬透的组织导致材质的强度、硬度和冲击性能较差,从而导致断裂。采用优化的淬火工艺,材料寿命达到了正常水平。
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| 关 键 词： | 4140钢 断裂原因 力学性能 显微组织 |
| 收稿时间： | 2020-03-21 |
Cause analysis and improvement measures of 4140 steel curved shell |
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| Wang Jinyong,Qi Xilun,Cao Hongbo.Cause analysis and improvement measures of 4140 steel curved shell[J].Heat Treatment of Metals,2020,45(9):240-243. |
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| Authors: | Wang Jinyong Qi Xilun Cao Hongbo |
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| Affiliation: | Handan Xinxing Special Pipe Co.,Ltd.,Handan Hebei 056300,China |
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| Abstract: | More fractures happened in the 4140 steel curved shellproduced by a drlling tool factory.The reason for fracture of the failed curved shell was studied by analysis of chemical composition,mechanical properties and microstructure,and the heat treatment process was optimized accordingly.The results show that the fracture of the failed curved shell is caused mainly by incomplete quenching,which results into a large quantity of strip ferrite and block ferrite in the microstructure and poor strength,hardness and impact toughness of the material.By adopting the optimized quenching process,the material life reaches the normal level. |
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| Keywords: | 4140 steel fracture cause mechanical properties microstructure |
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