| 胀断连杆用C70S6 BY钢连轧材探伤不合格原因分析和工艺改进 |
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| 引用本文： | 康湉,刘向艳,杨建华,翟军,孙琦,穆立峰,马群. 胀断连杆用C70S6 BY钢连轧材探伤不合格原因分析和工艺改进[J]. 特殊钢, 2019, 40(2): 21-23 |
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| 作者姓名： | 康湉 刘向艳 杨建华 翟军 孙琦 穆立峰 马群 |
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| 作者单位： | (抚顺特殊钢股份有限公司1连轧厂;2初轧厂;3技术中心，抚顺113001) |
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| 摘 要： | 非调质钢C70S6 BYΦ60 mm棒材的生产流程为60 t UHP EAF-LF-VD-240 mm×240 mm坯连铸-连轧。连轧材经现场超声波探伤并对缺陷定位取样,通过低倍、金相显微等检验方法对缺陷进行分析,得出该缺陷为心部裂纹,其产生原因主要是铸坯加热不均和轧后冷却应力较大造成。通过改善铸坯加热工艺,将加热二段温度从1 239℃提高至1 248℃,总加热时间≥2.0 h,均热段1 232℃20～40 min,轧后冷却由堆冷24 h改成坑冷38 h,探伤不合格率由36. 80%降至0. 78%。
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| 关 键 词： | 胀断连杆用非调质钢C70S6BY探伤心部裂纹工艺改进 |
| 收稿时间： | 2019-10-10 |
Analysis on Cause of Off-Qualified Continuous-Rolling Products of Steel C70S6 BY by Ultrasonic Detection and Process Improvement |
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| Kang Tian',Liu Xiangyan,Yang Jianhua,Zhai Jun,Sun Qi,Mu Lifeng and Ma Qun. Analysis on Cause of Off-Qualified Continuous-Rolling Products of Steel C70S6 BY by Ultrasonic Detection and Process Improvement[J]. Special Steel, 2019, 40(2): 21-23 |
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| Authors: | Kang Tian' Liu Xiangyan Yang Jianhua Zhai Jun Sun Qi Mu Lifeng Ma Qun |
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| Affiliation: | (1 Continuous Rolling Mill, 2 Blooming Mill and 3 Technology Center, Fushun Special Steel Co Ltd, Fushun 113001) |
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| Abstract: | |
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| Keywords: | Material Index Non-Quenching and Non-Tempering Steel C70S6 BY for Fracture Splitting Connecting Rod Ultra?sonic Detection Center Cracks Process Improvement |
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