共查询到19条相似文献,搜索用时 62 毫秒
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朱建勇 《金属材料与冶金工程》1998,(6)
对铜─镍─铝─钛合金的不同时效工艺进行了实验,通过测定合金试样的硬度、力学性能、冷弯性能和时效变形特性等.来考察分级时效工艺对该合金性能的影响.并从中确定出合金的最佳单级时效工艺:500℃时效4h,或冷变形50%+500℃时效4h;以及最佳分级时效工艺:650℃时效15min+500℃时效2h.或650℃时效15min+冷变形50%+500℃时效2h。 相似文献
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对含过程变量的三分含下界约束的线性-倒数混料模型,研究了参数估计的E最优正交区组设计,并应用最优化理论给出了ε0=0.5%~3.5%的最优典型设计点。对含有 相似文献
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简要论述A1─Ti─B在连铸连轧过程中的变质效果,分析了TiB_2和TiA1_3粒子尺寸和合金形态在晶粒细化过程及轧制中的作用。 相似文献
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应用ICP─AES法同时测定了汽车废催出剂中铂、钯、铑元素,该方法具有样品处理简单,快速,测定准确等优点,其回收率为97%~99%。 相似文献
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目前,隧道窑—反应罐海绵铁生产工艺中,不同厂家的主要设计参数差别很大。为探讨这些参数的合理性。笔者设计了几个主要参数的测定方法,以便通过试验确定这些参数。 相似文献
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对含过程变量的三分量含约束的线性-对数混料模型,研究了其参数估计的A-最优正交区组设计并应用最优化理论给出了ε=1%-10%的最优典型设计谱点。 相似文献
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对含过程变量的三分量含约束的线性—对数混料模型 ,研究了其参数估计的 A—最优正交区组设计 ,并应用最优化理论给出了 ε=1~ 1 0的最优典型设计谱点 相似文献
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对含过程变量的三分含下界约束的线性—倒数混料模型 ,研究了参数估计的 E最优正交区组设计 ,并应用最优化理论给出了 ε0 =0 .5~ 3.5的最优典型设计点 相似文献
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梅钢引入六西格玛工具中的混料设计方法,对烧结配矿方案进行优化,以降低试验和生产成本.实践表明,该方法的应用减少了试验的盲目性,提高了工作效率,在达到试验目的的同时,减少了试验次数,降低了试验和生产成本. 相似文献
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Daniela Bortoluzzi Larissa Rodrigues 《Mineral Processing and Extractive Metallurgy Review》2013,34(4):202-209
This article deals with the study of the vitrification mechanism as an inertization method for coal ashes contaminated with heavy metals. Ashes from coal (thermoelectric) and wastes from mining of fluorite and feldspar and from plating were used to compose vitreous systems using a mixture design. The chemical composition of the wastes was determined by XRF and the formulations were melted at 1450°C for 2 h using 10% (mass) of Na2CO3 (as a fluxing agent). The glasses were poured into a mold and annealed (600°C). The characteristic temperatures were determined by thermal analysis (DTA, air, 20°C/min) and the mechanical behavior by HV. As a result, the softening temperature is strongly dependent on silica content of each glass, and the fluorite residue, being composed mainly by silica, strongly affects on the glass transition (Tg) and softening (Ts) temperatures. The hardness by micro-indentation of all glasses is mainly affected by the plating (galvanic) residue due to the high iron and zinc content of this waste. 相似文献
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碳素阳极配料计算机过程控制系统 总被引:1,自引:0,他引:1
针对国内碳素配料采用人工控制下料量,很难确保配料比例的准确,因而难于保证产品质量的现状,碳素阳极配料计算机控制系统将先进的PLC控制技术和配料智能补偿算法相结合,运用变频调速方式控制电机,实现了碳素阳极配料的精确计量和自动控制。该系统的应用,年投资回报率在50%以上,具有显著的经济和社会效益。 相似文献
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Praseodymium was selected as a promoter for SnO2/Ti electrode to improve the electrocatalytic performance by electrodeposition in pharmaceutical wastewater treatment; the micrograph and the structure were characterized by SEM and XRD. Mixture uniform design was used in the optimization of the electrolytic conditions; mathematical model was established according to the rate of wiping COD off, which revealed the relationship between the current intensity, time of electrolysis, the amount of doped Pr, and the ratio of area (SnOJTi:Al). On the basis of the analysis of the empirical model, the optimized parameters had been obtained; the rate of wiping COD off was up to 94.9%, it decreased from 392 to 20 mg/L. Experimental results showed that the electrocatalytic performance of the electrode doped with Pr was superior for the treatment of pharmaceutical wastewater. 相似文献
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介绍了一种通蒸汽预热烧结混合料的新型加热料仓的结构、特点、工作原理及在邯钢炼铁厂的使用情况。其蒸汽利用率可达95%以上,可使混合料温度提高到70℃以上,该厂使用这种加热技术后,获得了良好的生产效果。 相似文献
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