| 55CrSi油淬火回火弹簧钢丝卷簧断裂分析 |
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| 引用本文： | 邢献强,菅军伟.55CrSi油淬火回火弹簧钢丝卷簧断裂分析[J].金属制品,2014,40(6):31-34. |
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| 作者姓名： | 邢献强 菅军伟 |
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| 作者单位： | 1. 中钢集团郑州金属制品研究院有限公司,河南郑州,450001
2. 广州市奥赛钢线科技有限公司,广东广州,511450 |
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| 摘 要： | Ф7.2 mm 55CrSi油淬火回火弹簧钢丝卷簧过程中断裂。采用带能谱的场发射扫描电镜、金相显微镜和显微硬度计等设备对样品进行分析。结果表明:由于生产油淬火回火弹簧钢丝的弹簧钢线材心部存在严重的成分和组织偏析,造成其冷拔过程中心部偏析带上产生许多"V"字形微裂纹,并遗传到油淬火回火成品弹簧钢丝上,较大的"V"字形裂纹在冷卷簧时强大的外力作用下,迅速扩展形成喇叭状断口。
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| 关 键 词： | 55CrSi 油淬火回火弹簧钢丝 偏析 抗拉强度 断面收缩率 |
Fracture analysis of 55CrSi oil quenched and tempered spring steel wire coil spring |
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| XING Xian-qiang,JIAN Jun-wei.Fracture analysis of 55CrSi oil quenched and tempered spring steel wire coil spring[J].Steel Wire Products,2014,40(6):31-34. |
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| Authors: | XING Xian-qiang JIAN Jun-wei |
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| Affiliation: | XING Xian-qiang, JIAN Jun-wei(1 Sinosteel Zhengzhou Research Institute of Steel Wire Products Co. ,Ltd. , Zhengzhou 450001, China; 2. Guangzhou ORSA Wire Science and Technology Co. ,Ltd. , Guangzhou 511450, China) |
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| Abstract: | Diameter 7.2 mm 55CrSi oil quenched and tempered spring steel wire fractures in coiling spring process. The sample was analyzed by adopting device such as field emission scanning electron microscopy with energy spectrum, metal- lurgical microscopy and microhardness tester. Results show that serious composition and structure segregation exists in spring steel wire core of producing oil quenched and tempered spring steel wire, which causes many V-type micro cracks produced on central segregation band in wire drawing process, and inherits oil quenched and tempered spring steel wire, larger V-type cracks spread quickly into horn fracture in coiling spring process under the action of external force. |
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| Keywords: | 55CrSi oil quenched and tempered spring steel wire segregation tensile strength reduction of area |
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