| 矫直对H型钢残余应力影响规律的研究分析 |
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| 引用本文： | 崔丽红,臧勇,秦勤,吴迪平,袁鹏举,宋江腾.矫直对H型钢残余应力影响规律的研究分析[J].机械设计与制造,2009(2). |
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| 作者姓名： | 崔丽红 臧勇 秦勤 吴迪平 袁鹏举 宋江腾 |
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| 作者单位： | 1. 北京科技大学,机械工程学院,北京,100083
2. 莱芜钢铁集团有限公司技术研发中心,莱芜,271104 |
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| 摘 要： | 根据实测温度场的数据,模拟了H型钢H700×300的轧后冷却温度场,计算得到了冷却过程中产生的热应力分布.以冷却2400s时的热应力做为H型钢矫前的初始残余应力、引入到九辊矫直模型中,研究分析了矫直过程中型钢内残余应力的遗传演变规律.经过多辊矫直,翼缘高度方向呈抛物线状分布的初始纵向残余应力基本没有改变;腹板宽度方向大部分的初始残余应力仍然遗传到矫后,只有腹板根部的应力分布与矫前明显不同.就目前生产采用的矫直工艺参数而言,矫直过程对改善残余应力分布的效果并不明显,因此要提高产品性能,应从H型钢的轧制及冷却方面的控制入手.以保持较低水平的初始残余应力才是根本.
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| 关 键 词： | H型钢 矫直 温度场 残余应力 |
The analysis of evolving rule for the residual stress in H-beam during straightening process |
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| CUI Li-hong,ZANG Yong,QIN Qin,WU Di-ping,YUAN Peng-ju,SONG Jiang-teng.The analysis of evolving rule for the residual stress in H-beam during straightening process[J].Machinery Design & Manufacture,2009(2). |
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| Authors: | CUI Li-hong ZANG Yong QIN Qin WU Di-ping YUAN Peng-ju SONG Jiang-teng |
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| Affiliation: | 1School of Mechanical Engineering;University of Science and Technology Beijing;Beijing 100083;China;2The Technical R & D Center;Laiwu Iron & Steel Incorporation;Laiwu 271104;China |
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| Abstract: | According to the data of temperature from measurement,the paper simulated the temperature field and calculated the thermal stresses during H-beam cooling.By using the INITIAL CONDITIONS INTRODUCE function in MSC.Marc,the thermal stresses which H-beam cooled 2400s were introduced into the multi-roller straightening model as initial stresses,and obtained evolving rule for the residual stress in cross-section during straightening.It is found that the longitude stress in the flange which was paracurved in shape... |
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| Keywords: | H-beam Straightening Temperature field Residual stress |
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