共查询到19条相似文献,搜索用时 109 毫秒
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对热处理炉炉温均匀性的测量目的、测试点的选择、检测方法及测试结果数据分析和评定进行了论述,并具体就特殊钢分公司高合金车底式退火炉的温度均匀性测量进行了介绍,对实际生产运用具有一定的指导意义. 相似文献
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分析了大型燃气热处理炉炉温均匀性的影响因素及炉温均匀性检测方法,通过改善烧嘴形式、装炉方式、烧嘴状态及控温热电偶布置位置等措施,可使大型燃气台车式热处理炉炉温均匀性得到提高. 相似文献
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本文结合设计与现场调试的实验,对工业炉的炉温影响因素,从电控的角度进行了详细的分析,并提供了实际记录资料,可供同行参考。 相似文献
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主要分析与探讨了利用电控手段,提高大型真空退火炉控温精度及炉温均匀性的问题.针对上述情况,结合西部锆业有限责任公司的DL2890型真空退火炉在控温精度及炉温均匀性方面的情况加以分析与探讨. 相似文献
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依据山东南山铝业股份有限公司82MN挤压机的30m时效炉炉温的均匀性测量,阐述了测量炉温均匀性的重要性,并对时效炉的测量目的、测量方法、测量模型及测量结果数据进行了论述。 相似文献
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热处理电阻炉温度的预测控制 总被引:3,自引:0,他引:3
基于过阻尼过程的简化脉冲响应模型,设计了热处理电炉温度的预测控制系统,实际应用结果表明,该控制系统具有好的跟踪性,鲁棒性和抗干扰性。 相似文献
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为了对热处理炉的加热温度进行优化和控制,提高自动化程度及加热质量,有效降低能源消耗,运用热处理炉温度模型的设计,根据对流和辐射的原理,着重介绍了热处理炉控制系统温度模型的算法及应用原理,详细说明了算法设计思想和计算等。同时与PLC的数据接口以及报文传送内容进行了设计和解释,描述了模型算法流程及温度模型的实现。 相似文献
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《Baosteel Technical Research》2010,(Z1):117
The aim of the thesis is to utilize essential theory of heat transfer,to use correlative expressions to calculate average convection heat change coefficient and heating temperature of strip in Jet Preheat Furnace (JPF),make the calculating results accordant with production data,and make the calculation to be used the process of production.The method is to collect:entry temperature and speed of strip,temperature and speed of N2 - H2,to analyse heat transfer according to length and thickness of strip,jet hole and mutual position of jet piping in JPF,to analyse heat transfer and built the physical model.In mathematic model, Martin correlative expressions are tried to calculate using the data from production,and are modified in part properly.At the same time,heat boundary condition is analysed with theory of impact jet and production data.The conclusion is obtained that boundary condition is rarely average numerical value of temperature of strip and N2 - H2 with impact jet condition,instead of a relation of function of temperature of strip, temperature and speed of N2- H2,array of jet holes,diameter of hole,distance between hole and strip,and acquired a calculating expression.In calculation of examples,the thesis collected and calculated 15 kinds of strips.The thickness of strips are 2=0.511.41 mm,material DQ - IF、DDQ,EDDQ,SEDDQ and 340DDQ.Main assess numerical value is temperature value after strip is heated with certain speed and within section of time.Maximum error in 9 groups of numerical value in the thesis is 3.36%comparing with production data.The correlative expressions can be used in production to adjust temperature of strip through changing speed and temperature of N2 - H2 and speed of strip.The correlative expressions are compiled computer process.The process can be applied in on line control of production by rapid calculating speed. 相似文献
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对辊底式热处理炉炉内辊道典型的传动控制模式进行了介绍和分析对比,对单独传动控制模式进行了重点介绍.单独传动控制模式具有辊道动态分组、坯料精确跟踪、辊道按需自动摆动等功能,在燃烧空间的利用率、提高产能、减低能耗等方面有很大的优势,为今后辊底式热处理炉传动控制的设计提供了思路和方法,符合"精准设计,精细控制"的发展方向,并可产生较好的经济效益,值得推广. 相似文献
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Dominique Bouchard Jean-Paul Nadeau Daniel Simard François G. Hamel Belinda Howes Clotilde Paumelle 《Metallurgical and Materials Transactions B》2002,33(3):403-411
To determine the optimal roll temperature in a twin-roll copper-strip caster, copper blocks preheated between 25 °C and 350
°C were immersed in a bath of molten copper for 0.5 seconds. A significant increase in the contact heat-transfer coefficient
at the substrate-shell interface was obtained when the substrates were heated above 200 °C and the gain in the solidified
shell thickness was 20 pct. The shell growth was also approximately 35 pct more uniform at a high substrate temperature, and
micrographic examination showed the dendritic structure to be finer. The contact heat-transfer coefficient was decomposed
into two constituents, one for the substrate and the other for the shell. The former was found to be the limiting factor in
heat transfer. 相似文献