机械合金化Cu—5Cr合金的组织性能研究

研究了机械化金化制粉，热静液挤压致密制备的Ｃｕ－５Ｃｒ合金的组织与性能，机械合金化Ｃｕ－５Ｃｒ合金由于细晶强化和弥散强化的作用，具有很高的强度（σｂ≥７５０ＭＰａ）经热处理后，合金具有较高的延伸率（δ≥８％）和导电性（≥６０％ＩＡＣＳ）。材料晶粒达到０．１μｍ级，析出的Ｃｒ粒子的达到纳米级。     

机械合金化Cu-5%Cr合金的制备及其组织性能的研究

采用机械合金化与热静液挤压技术制备了Ｃｕ５％Ｃｒ合金块体材料,研究了该材料的显微组织、力学性能和导电性,探讨了材料的强化机理,揭示了机械合金化时间和挤压温度对材料组织性能的影响规律。结果表明,机械合金化Ｃｕ５％Ｃｒ合金组织细小均匀,兼有细晶强化、弥散强化和沉淀强化效果,因此具有很高的抗拉强度,其值高达８００～１０００ＭＰａ。同时,合金仍具有较好的塑性和良好的导电性能,其伸长率达５％左右、相对电导率达５５％～７０％ＩＡＣＳ。     

微晶,纳米晶CuCr触头材料的组织及性能

采用机械合金化的方法制备出Ｃｕ－Ｃｒ纳米合金粉并分别在９２０℃，７５０℃及５８０℃将合金粉热压烧结得到微晶，纳米晶ＣｕＣｒ合金。５８０℃热压可以得到致密度大于９０％的钠米晶ＣｕＣｒ块体，７５０℃及９２０℃热压晶粒长大到微米量级。     

Cu—C—Ti系和Cu—CuO—Al系合金粉末的机构合金化

将Ｃｕ－Ｃ３．３％－Ｔｉ１３．３％和Ｃｕ－ＣｕＯ２．５％－Ａｌ１．１％二合金粉末分别进行机械合金化，结果发现，经２０ｈ球磨后，Ｃ的衍射峰已经消失，Ｔｉ，Ａｌ，ＣｕＯ的衍射峰强度显著降低；６０ｈ球磨后，二合金粉末都形成了Ｃｕ基过饱和固溶体；１００ｈ球磨后，部分Ｔｉ，Ｃ，Ａｌ，Ｏ溶质元素脱溶析出，并反应生成ＴｉＣ和Ａｌ２Ｏ３。     

光度-折光法研究铜(Ⅱ)、铬(Ⅲ)与乙酸根的配合物

在ｐＨ５．２左右的水溶液中,Ｃｕ与乙酸根（Ａｃ）可形成１：４型蓝绿色配合物,其与Ａｃ－形成１：６型紫色配合物,其溶液中ＣｕＡｃ,Ｃｕ（Ａｌ）２,Ｃｕ（Ａｃ）,Ｃｕ（Ａｃ）四级配离子的累积稳定常数β＝１．４１ｘ１０７（ｕ＝０．１,ＮａＣｌＯ４,２２℃）：溶液中ＣｒＡｃ,Ｃｒ（Ａｃ）,Ｃｒ（Ａｃ）３,Ｃｒ（Ａｃ）,Ｃｒ（Ａｃ）５,Ｃｒ（Ａｃ）６六级配离子的累积稳定常数β６＝１．８８ｘ１０１１（ｕ＝０．１,ＮａＣｌ４,２５℃）。     

挤压用的新型铝──锂合金

挤压用的新型铝──锂合金据世界专利９４２４３２９号报道，加拿大铝业公司国际有限公司（ＡｌｃａｎＩｎｔｅｒｎａｔｉｏｎａｌＬｔａ）发明一种供航天航空工业用的铝－锂合金，具有相当好的挤压性能，可用于挤压各种型材。它至少含有０．１％Ｃｕ和≥１．５％Ｌｉ；铸...     

机械合金化法在制造ODS、CDS合金中的应用

机械合金化是开发新型材料的手段之一。由机械合金化法制得的氧化物弥散强化（ＯＤＳ）和碳化物弥散强化（ＣＤＳ）合金具有更高的断裂强度和良好的抗氧化能力。本文介绍了ＯＤＳ合金和ＣＤＳ合金的制造方法及其力学性能。     

铁基耐磨合金与45钢的组合烧结

研究了含铬耐磨铸铁的烧结合金与４５钢的组合烧结。试验发现，由于碳、磷、硼的多元强化作用，在Ｆｅ－５Ｃｒ－２Ｃｕ－１Ｎｉ－１Ｍｏ合金粉末中加入碳、磷、硼等合金元素后，经压制及１１２０℃真空烧结，可获得较高的密度和压溃强度；该合金系与４５钢有很好的组合烧结性能，二者之间发生界面迁移扩散，产生冶金结合；添加３．５％石墨、０．１％硼及１０％铬的烧结合金与４５钢的粘结强度为４５０ＭＰａ。     

C652钢及其高精度冷轧（拔）液压油缸用管的研制

叙述了经Ｒｘ微合金化的－４０℃级Ｃ６５２（１５Ｍｎ２ＮｉＶ）钢及其δ５≥６２０ＭＰａ，δ５≥１２％的高精度冷轧（拔）液压油缸用无缝管的研制过程。所研制钢管的尺寸公差，表面质量，力学及焊接性能均满足科研协议的技术要求。     

MmNi5-x(CoAlMn)x/Mg纳米晶复合储氢合金的吸氢性能

研究了机械合金化制备的ＭｍＮｉ５－ｘ（ＣｏＡｌＭｎ）ｘ／Ｍｇ纳米晶复合储氢合金的吸氢特性。通过测定不同镁含量的ＭｍＮｉ５－ｘ（ＣｏＡｌＭｎ）ｘ／Ｍｇ纳米晶复合储氢合金的吸氢ＰＣＴ曲线,考察了镁含量对其吸氢特性的影响。根据对吸氢速度的测定研究了机械合金化对储氢合金的吸氢动力学特性的影响。机械合金化制备的纳米晶复合储氢合金的活化性能与ＭｍＮｉＭ５－ｘ（ＣｏＡｌＭｎ）ｘ铸态合金相比有较大的提高,不需活化或只需一次活化即可吸氢,吸氢量及吸氢的动力学性能与铸态合金相比也有很大的提高。最后对机械合金化形成的纳米晶吸氢特性进行了分析。     

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.     

Seven Rare Earth Projects Involving Close to 3 Billion Yuan Investment Landed In the HighTech Zone

正On May 22,Baotou Rare Earth Industry Cooperation Consultation MeetingProject Agreement-signing Ceremony was held in Ningbo,nearly 40 enterprises from Ningbo,Guangdong,Hunan,and Shanxi participated in project consultation.After multi-lateral communication,agreements were signed for a total of 7 rare earth projects successfully.