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THERMAL STABILITY OF NON-EQUILIBRIUS MICROSTRUCTURE IN MICROALLOYED STEEL DURING REHEATING S.W. Yang1,D. Tang2,H.B. Wu2,H.T. Jiang2,X.L. He1 (1.Dept. of Materials Physics, University of Science.... The sample relaxed for 60s displayed the highest thermo-stability, whereas microstructure evolution was the quickest in the sample relaxed for 1000s even though it was the softest prior to reheating......
再加热炉燃烧控制系统马志坚1,魏光星1(1.内蒙古自治区包头市中冶东方工程技术有限公司自动化所)摘 要:以攀钢集团成都钢铁厂318轧管厂再加热炉为研究对象,从炉温检测系统,炉温调节系统及用户程序三方面介绍了该再加热炉比例式燃烧控制系统,以及与常规双交叉燃烧控制系统的区别.针对该种燃烧控制系统及不同的外部干扰因素,编制控制程序时采取了一些相应措施,可将炉温有效地控制在设定值±5℃范围内,并在炉温大幅偏离设定温度值时,能够在短时间内将炉温重新稳定在设定值,而不会出现大幅振荡.比例式燃烧控制系统具有控制灵活,准确度高......
Trans. Nonferrous Met. Soc. China 20(2010) s961-s967 Induction reheating of A356.2 aluminum alloy and thixocasting as automobile component H. LAKSHMI1, M. C. VINAY KUMAR2, RAGHUNATH1, P... experiments, a set of process parameters were identified to produce the best microstructures. Reheating of a billet with non-dendritic microstructure to a semisolid temperature was the next step for thixo......
板坯加热炉三维温度场数学模型系统的开发及应用商桂梅1,焦吉成1,张世建1,邓君堂1,赵传领1(1.山东省济南市济钢集团有限公司技术中心)摘 要:提供一种步进式板坯加热炉三维温度场数学模型系统在线应用的技术思想及实施方案.模型系统分别与一级,三级系统通信,实现了坯料在加热炉内各位置,各时间段内的动态跟踪以及温度的实时预报.系统吸收了国内外相关模型的优点,融入了最新的计算机仿真技术,数据挖掘技术,优化了加热制度,减少了氧化烧损,为加热炉操作者提供了科学,直观的操作指导,系统预报温度准确率达到93%以上,误差在±10......
reheating at 600 ℃ for 10-12 min. The extrusion after reheating at 600 ℃ for 10-12 min can eliminate the hole in the spray deposited alloy and decrease the size of Si particles, extruded bars have good... reheating at 600 ℃ for 12 min. Key words: Al-27%Si alloy; spray depositing; reheating treatment; semi-solid extrusion; tensile strength; relative density Al-27%Si(质量分数)合金具有良好的比刚度,膨胀系数与印刷电路板相匹配,能减少射频散......
鞍钢宽厚板厂步进式加热炉A3A控制系统功能分析 孙红岩1,王文天1 (1.鞍山钢铁集团公司建设公司鞍山 114003) 摘要:介绍鞍钢宽厚板厂步进式加热炉的工艺流程,并分析其A3A控制系统的板坯测长,炉前板坯对中定位,推钢机定位,步进梁行程定位,出钢机定位等全自动控制功能. 关键词:步进式加热炉PLCA3A控制系统; walking-beam reheating furnace; PLC; A3A control system; [全文内容正在添加中] ......
热轧板坯加热温度场数值模拟及应用李俊洪1,林霞2,刘勇3,温亚成3,李卫平3,李玉和4(1.四川省攀枝花市 攀枝花钢铁研究院2.攀枝花钢铁研究院,四川攀枝花 6170003.攀钢热轧厂,四川攀枝花 6170624.攀枝花学院,四川攀枝花 617000)摘 要:建立了三段步进梁式加热炉板坯加热过程数学模型,用全隐式有限差分法对数学模型进行离散化,开发了板坯温度场计算模型.采用该模型重点研究了板坯宽度对板坯中心温度变化过程的影响规律.研究结果表明,对于厚度为200 mm的板坯,当板坯宽度大于600 mm时,板坯中心......
采用低温板坯加热工艺生产的取向硅钢中抑制剂的研究孙颖1,2,李军2,赵宇2,喻晓军2,连法增-2(1.辽宁省沈阳市东北大学材料与冶金学院2.北京市安泰科技股份有限公司功能材料事业部)摘 要:对采用低温板坯加热工艺生产的取向硅钢的抑制剂析出行为进行了研究,试验结果表明,本工艺的抑制剂是在热轧阶段开始弥散析出的,热轧板,脱碳退火板和回复板析出相的抑制能力呈递增趋势.抑制剂以Cu2S为主,还有一定量的(Cu,Mn)S,Cu2S+AlN等复合析出相,AlN不起抑制剂作用.关键词:低温板坯加热; 取向硅钢;......
Numerical simulation of fluid flow in a reheating furnace with multi-swirling-burnersBaowei Li,Zengwu Zhao, Yike Li, Wenfei Wu, and Daqiang Cang1) Baotou University of Iron and Steel Technology... simulating program for three-dimensional (3-D) and time-dependent fluid flow for a reheating furnace with multi-swirling-burners has been developed based upon an arbitrary Lagrangian-Eulerian scheme......
Influencing Factors of Reheating Shrinkage Rate of Glass Substrate on LTPS Process王伟来1,田英良1,2,WANG Wei1,LIU Yaru1,SUN Shibing1,Lü Feng1,CHEN Xinxin11. Faculty of Materials and Manufacturing, Beijing... the LTPS procedure.The experimental results show that the reheating shrinkage rates of glass substrates are rarely changed with increasing the heating rate,but strongly enhanced by raising the holding......