稀土镁铜多元复合蠕化剂的研制

作者在研究了微量元素镁、铜、铝、钙及硫对稀土蠕铁中稀土残留量范围的影响及对蠕铁白口倾向影响的基础上，设计了稀土镁银多元复合蠕化剂。该合金适用于在冲天炉铁水条件下生产薄壁及一般壁厚的蠕铁铸件，具有处理时铁水适度沸腾，反应动力学条件好，脱硫能力强，蠕铁白口倾向小，处理简便，蠕化效果稳定，蠕化剂残量范围宽等特点。     

喂线工艺生产蠕铁柴油机缸体缸盖的技术

本文介绍了蠕墨铸铁柴油机缸体缸盖的喂线生产铸造工艺技术。研究了喂线法与热分析技术相结合的蠕墨铸铁生产工艺。该工艺既有喂线法精确控制喂线量的优点,又能通过热分析技术对铁液蠕化效果进行预判,能够保证蠕化效果,可以应用于缸体缸盖等蠕墨铸铁件的批量生产。同时分析了蠕墨铸铁生产工艺过程中存在的问题,提出了解决措施。     

用镧金属和镧硅铁合金制取蠕墨铸铁的研究

本文研究了用镧金属和镧硅铁合金制取蠕铁的工艺,并且提供了蠕铁的金相照片、深腐蚀照片及机械性能数据。研究表明,用镧金属和镧硅铁合金作蠕化剂可以比其它蠕化剂(如铈和铈硅铁合金)更容易地制取蠕铁,镧金属和镧硅铁合金是很有前途的制取蠕铁的添加剂。镧硅铁合金处理低硫和中硫原铁水制取蠕铁的加入量范围分别为1.0～3.0%和2.1～3.0%。用镧金属及镧硅铁合金直接处理中硫和高硫原铁水制取蠕墨铸铁在经济上是不可取的,建议采取预脱硫措施。     

4#焦炉设备生产实践

在4#焦炉设备生产中，我们使用了新型变质蠕化剂，在蠕化处理工艺上进行了进一步改进。实践表明，4#焦炉设备综合性能大幅提高。这样就为提高焦炉生产效率，延长焦炉寿命奠定了坚实基础。     

微量元素对稀土蠕铁白口倾向的影响

本文以稀土蠕铁的白口倾向为标样,通过测量激冷试块的硬度与稀土残留量,系统地考察了微量元素锌、钙、铜、铋、钛、铝、硫对稀土蠕铁白口倾向的影响。从而得出在稀土蠕铁中,铜、锌、铋是促进石墨化的元素;稀土和硫是反石墨化元素;钙、铝、钛在稀土含量低且冷却速度大时是反石墨化元素,而在稀土含量高时则是促进石墨化的元素。     

蠕化铁水质量的在线检测

蠕化铁水共晶度的测量对蠕铁的生产至关重要,蠕化铁水质量的在线检测主机包括蠕化铁水共晶度的测量,蠕化铁水活性镁含量的测量和蠕化铁水的共晶再辉温度测量。     

蠕化剂加入量对蠕墨铸铁组织和性能的影响

以3M78缸体为研究对象,使用自制蠕化剂,通过金相观察和力学性能测试,系统研究了不同蠕化剂加入量对蠕墨铸铁的石墨形态、力学性能和壁厚敏感性的影响。实验结果表明,随着蠕化剂加入量的增加,石墨发生由片状向蠕虫状再向球状形态的转变,力学性能逐渐提高。铸件蠕化效果受壁厚敏感性影响显著,壁厚较薄处蠕化率相对较低。对于3M78缸体,蠕化剂最佳加入范围为0.325%~0.335%,加入量为0.33%时,壁厚为5 mm、12 mm、27 mm部位处的蠕化率分别高达65%、80%、85%。研究结果为蠕墨铸铁发动机缸体的稳定生产提供技术参考。     

高温下奥—贝蠕铁的组织与性能

奥—贝蠕铁是继奥—贝球铁之后发展起来的新型工程材料之一，也是世界上正在开发的材料。本文系统地提供了奥—贝蠕铁的制取工艺，奥—贝蠕铁的组织特征及其在常温及随温度提高力学性能变化的规律。研究表明，以稀土硅铁为蠕化剂，所制取的蠕化率大于９０％、基体以铁素体为主的蠕墨铸铁，经等温淬火后，可稳定地获得奥氏体—贝氏体基体（以下简称奥—贝蠕铁），它有较好的综合性能，在常温下σｂ＝８２０～９３７．５ＭＰａ，δ＝０．４０％～０．７８％；在６００℃时，σｂ＝１５８～１８７ＭＰａ，δ＝４．００％～７．８４％，仍超过ＨＴ１５０的常温性能。当低于３００℃时组织和性能稳定性较好，是适宜的工作温度范围     

广西玉柴喂线蠕化处理试验生产情况简介

2009年底开始进行喂线法蠕化处理试验生产以来，取得了一定的成效，通过试验生产的总结，认为喂线法是一种有发展潜力的蠕化处理方法，但存在许多问题有待进一步完善。     

铸铁模材质的研究及改进

简要介绍选用蠕墨铸铁作为铸铁模材质的原因、试制的工艺措施及装机服役情况，并分析了蠕墨铸铁模的使用寿命与其材质中的石墨形态的关系，指出蠕墨铸铁模的使用寿命主要取决于其本身的蠕化率。     

熔炼次数对M17返回料合金成分、组织和性能的影响

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。     

China's Major Non-ferrous Metals Imports & Exports

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Zinc Production by Province in 2014

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80% of Chinese Firms Purchasing Overseas Mines Ended up in the Red

<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     

Copper Processing Profit Dropped Sharply,Copper Consumption Will Face Impact in the Second Half of the Year

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,     

Central Geological Prospecting Fund Newly Added 16.47 Million Tonnes of Bauxite in 2013

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     

Manufacturers of Copper Tube for Central Air Conditioner Use Face Mounting Pressure in the Final Quarter of the Year

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     

Xinjiang Ranks No.1 in Production of Primary Aluminum in China

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,     

Shenhuo Coal Industry and Electricity Power Completed800,000 t/a Aluminum Project in Xinjiang

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.     

Guangdong Metal Transaction Center has Become the Second Largest Precious Metal Transaction Platform Nationwide

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.