| T9A碳素弹簧钢丝脆断原因分析 |
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| 引用本文： | 王勇胜,夏晶,刘冬梅. T9A碳素弹簧钢丝脆断原因分析[J]. 金属制品, 2011, 37(2): 32-34,37. DOI: 10.3969/j.issn.1003-4226.2011.02.008 |
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| 作者姓名： | 王勇胜 夏晶 刘冬梅 |
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| 作者单位： | 1. 东北特殊钢集团技术中心大连分中心,辽宁,大连,116031
2. 南阳北方向东工业有限公司,河南,南阳,474677 |
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| 摘 要： | 直径1.7 mm的T9A碳素弹簧钢丝在制簧过程中发生脆断。用扫描电镜对断口形貌进行分析,用金相显微镜观察断口附近横向、纵向及裂纹处金相组织,对断口处非金属夹杂物进行能谱分析,结果表明,钢丝异常组织降低了索氏体基体的塑性。加入钢中的稀土元素具有强烈易氧化的性质,与钢中的氧、硫等元素反应生成稀土夹杂物。钢中氧化物夹杂经轧制破碎及大总压缩率拉拔后,在其周围形成长度0.2μm的微裂纹。制簧过程中,裂纹发生扩展,最终使弹簧脆断。
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| 关 键 词： | T9A 弹簧钢丝 脆断 稀土元素 非金属夹杂物 |
Cause analysis on brittle fracture of T9A carbon spring steel wire |
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| WANG Yong-sheng,XIA Jing,LIU Dong-mei. Cause analysis on brittle fracture of T9A carbon spring steel wire[J]. Steel Wire Products, 2011, 37(2): 32-34,37. DOI: 10.3969/j.issn.1003-4226.2011.02.008 |
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| Authors: | WANG Yong-sheng XIA Jing LIU Dong-mei |
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| Affiliation: | WANG Yong-sheng1,XIA Jing1,LIU Dong-mei2(1.Dongbei Special Steel Group Co,Ltd.Dalian Branch,Dalian 116031,China,2.Nanyang Northern Xiangdong Industry Co.,Ltd.,Nanyang 474677,China) |
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| Abstract: | Brittle fracture occurred when spring was coiled by diameter 1.7mm T9A carbon spring steel wire.Fracture morphology was analyzed by adopting SEM.Microstructure of traverse,longitudinal and crack near fracture was observed.Non-metallic inclusion near fracture was analyzed by using energy spectrum.Results showed that steel wire abnormal structure decreased plastic properties of sorbite matrix.Rare earth element added in steel had the properties of strong oxidizability,the reaction with element of oxygen and s... |
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| Keywords: | T9A |
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