共查询到19条相似文献,搜索用时 109 毫秒
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热轧过程中工作辊和支承辊的磨损已成为热轧机研究课题和个人研究项目,这是由于它影响到最终产品质量或生产成本。轧制过程中,轧辊磨损改变了设定的轧制条件,使轧辊参数和表面粗糙度发生变化,轧辊参数(凸度、直径、辊形)的变化及轧辊热膨胀,通过最初及末架轧机影响带钢断面和平直度。关于轧辊表面状况的影响,考虑了两种不同的情况。第一,轧辊磨损改变了产品的表面形成条件;第二,当轧辊磨损很大时,轧件除鳞后产生的三次氧化铁皮,累积在轧辊凹坑中,直至达到某一极限后,从轧辊脱落,压入带钢表面,即产生众所周知的轧辊磨损下的… 相似文献
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传统的无缝钢管连轧机为两辊式轧机,天津钢管公司168钢管厂于2003年新建世界第1套PQF三辊式无缝钢管连轧机.通过介绍先进的自动化控制技术在该钢管轧机中的应用,论述了PQF连轧管机的角度和速度同步控制技术,分析了PQF轧机中限动芯棒系统采用的位置控制和转矩匹配技术.介绍了实践应用效果,表明了该控制系统的先进可靠性和对提高生产效率和产品质量的效果. 相似文献
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热带钢轧机轧辊磨损研究 总被引:18,自引:3,他引:15
论述了热带钢轧机轧辊磨损的形成机理及磨损分布的基本规律 ,分析了轧辊磨损的影响因素及目前磨损预报模型存在的问题 ,提出了今后轧辊磨损研究工作的建议。 相似文献
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针对中型轧机轧辊的磨损问题,介绍了激光表面合金化技术在轧辊上的应用。采用激光表面合金化技术能显著降低了辊耗,提高孔型轧制吨位。 相似文献
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天津钢管集团股份有限公司于2008年4月建成投产了目前世界上最先进的Ф258PQF连轧管机组,这是公司的第3套PQF连轧管机组。介绍了Ф258PQF连轧管机组的工艺流程,同时对该机组的穿孔机、PQF Plus连轧机、脱管机和定径机的技术参数和设备特点以及工艺控制系统和质量保证系统进行了说明。 相似文献
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针对热连轧精轧高速钢轧辊重复上机时存在残留磨损辊形和残留热辊形影响初始辊形的问题,分析了残留磨损辊形和残留热辊形对板形控制精度的影响及难点,得出轧辊温度场是高速钢轧辊重复上机初始热辊形最佳表征方式的结论,提出高速钢轧辊下机后空冷过程温度场建模思路,并建立轧辊空冷过程温度场计算模型。在此基础上,基于热连轧生产线二级系统框架,研究形成了高速钢轧辊重复上机初始辊形预报技术设计方案,并在首钢京唐公司1 580 mm热连轧生产线应用。应用结果表明,该技术对实现热连轧精轧高速钢轧辊更高效应用和提高板形控制精度有显著效果。 相似文献
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Mikael Jonsson 《国际钢铁研究》2007,78(4):333-339
A method for modelling the wear contour work rolls in a four‐high mill has been developed. The modelling is build up with statistical methods. The bases for the statistics are simulations of different rolling cases and measurements from the production of heavy plates in Oxelösund. These calibrations gave a well‐working model. 相似文献
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针对某冷连轧机在高强钢生产中出现的板形问题,以提高机组对高强钢产品的板形控制能力为目标,对中间辊和支持辊辊形进行了优化设计,并对第五机架精细冷却乳化液使用工艺进行了优化研究。新的高强钢板形控制工艺技术在生产中使用稳定,从根本上提高了轧机板形控制能力,0~3 IU的板形控制精度所占比例由83.71%提高到90.86%,轧辊磨损得到明显改善,应用效果显著。 相似文献
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Three-Dimensional Model for Strip Hot Rolling 总被引:3,自引:0,他引:3
ZHANG Guo-min XIAO Hong WANG Chun-hua 《钢铁研究学报(英文版)》2006,13(1):23-26
Steel stripis widely usedin many fields such asautomobile ,building,transportation and householdappliance ,etc·. Withthei mprovement in productiv-ity and automation of strip processing,the require-ments for crown and flatness of strip have been in-creasingly severe ,and“crown free”steel strips arerequired for some special applications such as for au-tomobile parts andtinplate cans .In order toi mprovethe strip quality , an effective three-di mensionalmodel is needful to further study on the… 相似文献
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While it is acknowledged that roll wear is one of the most challenges to hot strip mills (HSM), very few studies which detail an exact prediction model have been published. The aim of this work is to evaluate and compare two prediction models with measured roll wear. The first prediction model, model 1, developed for a plate mill, was modified to use in strip rolling process. The second prediction model, model 2, is a simplified on‐line model. Data of two hot strip mills were used to investigate the influence of different rolling schedules. The rolls and strip properties were described and the rolling conditions were detailed. The influence of hot rolling factors, such as strip strength, roll grades, rolling temperature, rolling force, reduction and contact length, were also studied. When rolling with different work roll materials and strip grades, the modified prediction model has better prediction accuracy than the simplified model. The accuracy of both models becomes better at higher roll wear > 150 μm. HSS work rolls were confirmed to exhibit improvement of roll wear in comparison with HiCr rolls, the wear resistance was 3 to 4 times better. The influence of strip grade on roll wear was shown to be significant, with higher accuracy of the regression statistics for rolling with similar strip grades and lower regressed accuracy for rolling with mixed strip grades. The roll wear was evaluated at the centre of the barrel. 相似文献
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导板是线材轧机的关键备件,要求有优良的耐磨性,抗断裂性,抗粘钢性和热冲击抗力,常用高镍镍钢导板和高铬铸铁导板满足不了上述要求,使用寿命短,更换频繁,降低了轧机作业率,增大了工人劳动强度,高速钢具有硬度高,红硬性好和耐磨性好等特点,但铸造高速钢脆性大,通过调整高速钢成分和采用RE-Mg-Ti复合变质处理,可改变共晶碳化物的形态和分布,使高速钢冲击韧性大幅度提高,变质处理高速钢导板使用中不粘钢,不断裂,耐磨性明显优于普通导板。 相似文献