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Burnishing is a surface treatment process widely used to improve fatigue and corrosion resistance of metal components by introducing a compressive residual stress layer. However, the measurement of residual stress by X-ray diffraction is expensive, time consuming, and tedious. Hole drilling method is quick and simple, but it is destructive and provides limited resolution in depth direction. This work presents a quick method to determine the nature and magnitude of residual stress by using Almen strips. Inspired by the application of Almen strips in shot peening, the deflection of the burnished Almen strips under different burnishing conditions were measured. In addition, a finite element simulation model has been developed to predict residual stresses and deflection which were compared with the experimental results. Contact conditions with different combinations of sliding and rolling were investigated in the simulations to understand the contact nature in a burnishing process. It was found that the deflection of Almen strip reflects the magnitude and penetration depth into subsurface of the induced residual stress. The contact condition during burnishing is either pure sliding or a mixed mode of sliding and rolling, but not pure rolling. 相似文献
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分析了首钢京唐钢铁联合有限责任公司1 580 mm热轧生产线轧制薄规格带钢时甩尾问题的原因,开展一年多的工艺技术攻关后提出了有效的预防控制措施,使该生产线轧制薄规格带钢时,尾部轧制稳定性得到了显著提高,甩尾事故明显下降。 相似文献
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Application of synergetic artificial intelligence to the scheduling in the finishing train of hot strip mills 总被引:3,自引:0,他引:3
S. Xiaoguang H. Ning S. Huyang W. Wei S. Zhenbang W. Guodong 《Journal of Materials Processing Technology》1996,60(1-4):405-408
In Synergetic Artificial Intelligence, Fuzzy Theory and Expert System can simulate logical inference ability in left-half-brain of human being. Theory models and Artificial Neural Networks can simulate thinking of images in right-half-brain of human being. All these parts of the methods fuse each other. It can settle many problems that can not be solved by traditional methods. In paper, Synergetic Artificial Intelligence is introduced and is applied to scheduling in finishing train of hot strip mills. 相似文献
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为解决某1 580 mm生产线生产薄规格产品时的穿带稳定性难题,经过分析后,从温度控制、精轧模型设定以及速度控制等方面进行了改进,由此降低了轧制薄规格带钢时穿带起浪、轧破及跑偏等事故发生率,使穿带稳定性得到了显著提高。 相似文献
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随着板带材越来越广泛的应用于工业生产,板带材的表面质量问题也越来越受到用户的关注.本文介绍了传统检测法、自动检测法以及机器视觉检测法三种常用的表面质量检测法,对其中的优缺点进行分析表明,采用面阵CCD技术和线阵CCD技术,结合自学习神经网络分类的机器视觉检测,在生产中应用效果较好.最后总结了板带材检测方法的发展方向:研究更有效的分类识别算法分类识别板带材的表面缺陷;优化图像采集和处理的算法,缩短计算时间. 相似文献
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精轧区热轧带钢表面氧化铁皮缺陷成因与预防 总被引:7,自引:2,他引:7
氧化铁皮缺陷是影响热轧带钢表面质量的重要因素之一。利用电子探针探测了基体不含Cr的热轧带钢在精轧区产生的表面氧化铁皮缺陷处的化学成分,根据其中Cr含量的变化规律。分析了缺陷的成因。并结合宝钢2050mm热轧机组情况,提出了预防和减少热轧带钢表面氧化铁皮缺陷的措施。 相似文献
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Cheng Lu A Kiet Tieu Zhengyi Jiang 《Journal of Materials Processing Technology》2003,140(1-3):569-575
In this paper a method to simulate the oil thickness and length of elastic deformation in the inlet zone of cold rolling has been developed. The mixed film lubrication model was adopted to describe the behavior of the lubricant and asperity deformation. The elastic Von Karman equation was used to describe the elastic deformation of strip in the inlet zone. The length and lubricant film thickness of the inlet zone can be obtained by a numerical method. Results of simulations show that the reduction, rolling speed, back tension have a significant influence on the lubricant film thickness and the inlet zone length. 相似文献
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介绍了广州铜材厂的 1 60 mm/ 550 mm× 60 0 mm四辊液压精轧机组的主要性能 ,设备组成 ,采用的先进技术。 相似文献
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热轧带钢宽展预报的人工智能方法 总被引:3,自引:1,他引:2
针对传统宽展计算模型的固有缺陷,提出一种基于人工智能方法建立的“多层感知器”神经网络模型,离线仿真结果表明,神经网络模型预报精度优于传统方法。 相似文献
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窄带钢生产现状及发展方向分析 总被引:1,自引:0,他引:1
对目前我国窄带钢生产现状进行了分析,认为窄带钢生产既具有一定优势,也面临巨大挑战。为此,对今后窄带钢生产工艺技术和设备的改进、完善提出了建议。 相似文献
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