共查询到20条相似文献,搜索用时 62 毫秒
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几年来 ,热处理分厂的电加热辊底炉共处理了几万吨轴承钢 ,其组织和硬度的一次合格率为1 0 0 %。高质量的退火组织的获得是基于先进的热处理设备和合理的工艺制度。本文通过实验 ,观察了不同温度、不同冷却速度对轴承钢球化组织的影响 ,并应用球化原理阐述了产生这种变化的原因。1 退火设备简介1 .1 辊底炉的主要结构热处理分厂的电加热式辊底炉是从西德纳塞尔炉子公司引进的先进技术 ,由双方合作设计、制造的 ,可用于特殊钢的正火和退火。辊底炉的主体结构如图 1所示。图 1 电加热辊底连续退火炉结构示意图Fig .1 Sketchof… 相似文献
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1前言辊底式炉适用于钢板、钢管和型钢的退火、正火、高温回大及淬火等热处理工艺。炉子一般采用气体或液体燃料,其加热方式可分为辐射管间接加热和燃烧明火加热两种。国内多数来用的是明火加热。由于辊底式炉处理的钢材质量好,产量高,同时实现了机械化和自动化操作,比间歇式生产的热处理炉有明显的优越性,因此得到了广泛应用。但六十年代设计与建造的辊底式炉往往只注重产量,而缺乏对节能措施的考虑,故燃料消耗指标较高,因此对辊底式炉进行技术改造,也成为当前工业炉节能的一项重要内容。几年来我们与我厂能源部、设计所的热工专… 相似文献
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主要介绍了重钢中板厂热处理作业线扩宽增能二期工程改造工程中,对新建辊底式热处炉的炉底辊传动结构优化设计方案的确定、方案实施及应用所取得的效果. 相似文献
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实验结果表明,M17铸造高温合金(%:0.16C、8.79Cr、5.79A1、4.93Ti、3.29Mo、15.20Co、0.78V、0.015B、0.073Zr、0.002S、0.001P、0.001 1O、0.001 0N)经25 kg真空感应炉返回重熔后,Si含量随重熔次数的增加而略有增加,合金中主要元素和其它杂质元素S、P、H的含量变化不大,而氧、氮略有增加;合金中初生碳化物由新合金中的草书体逐渐向返回合金块状转变,初生碳化物的遗传性堵塞合金凝固时的补缩通道,使返回料合金的疏松倾向增大,高温塑性下降较大。 相似文献
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<正>Minmetals Resources acquired the world’s largest copper mine under construction for USD5.85 billion.One after another,listed companies Jien Nickle,China Molybdenum and Chihong Zinc and Germanium raised money to get involved in overseas mining projects…SOEs and private enterprises are engaged in a frenzy of overseas mine purchasing.A reporter with Economic 相似文献
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正Judging from China’s copper consumption field,the biggest consumption unit is electric power,which accounts for 47%of total consumption;it is followed by light industry sector,including household electrical appliance,machinery,durable goods and hardware etc,which accounts for 22%of total consumption;followed by transportation field, 相似文献
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《China Nonferrous Metals Monthly》2014,(10)
正In 2013,the Central Geological Prospecting Fund(CGPF)Project newly discovered 15 ore fields,including 3 large above ore fields,and 5medium sized ore fields.The reporter learned from the recently published"Annual Report of Central Geological Prospecting Fund Project(2013)"that,from 2006 to 2013 the CGPF 相似文献
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《China Nonferrous Metals Monthly》2014,(10)
正This year,the investment growth rate of real estate industry continued to slow down,sold area of commercial housing also dropped significantly,which brought huge pressure to the domestic air conditioning manufactures.In the first half of the year,by relying on high growth in national financial expenditure,along with investment in public infrastructure 相似文献
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《China Nonferrous Metals Monthly》2014,(10)
正Kang Yi,Honorary Chairman of China Nonferrous Metals Industry Association,said recently at the Forum on Development of the Non-ferrous Metals Industry in Central and Western China held in Zhengzhou that,as more and more electrolytic aluminum factories in Xinjiang came into operation,the electrolytic aluminum output of Xinjiang had reached2,275,000 tons in the first 7 months this year, 相似文献
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《China Nonferrous Metals Monthly》2014,(12)
正"Xinjiang project has been completed according to schedule,but total completion and total start of production are two different concepts,after completion it still needs a gradual process of reaching production target."On the morning of November 3,Shenhuo Coal Industry and Electricity Power told investors the above statement on the investor interaction platform. 相似文献
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正The reporter learned from Guangdong Province Precious Metal Transaction Center that in 2013the Center maintained healthy development momentum,and had become the second largest precious metal transaction platform in China in terms of market size;currently Guangdong is quickening steps of financial innovation for the Center,aiming to build a transaction center with international core competitiveness. 相似文献