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了微晶、纳米晶CuCr合金. 580℃热压可以得到致密度大于90%的纳米晶CuCr块体, 750℃及920℃热压晶粒长大到微米量级. 纳米晶CuCr材料在真空间隙中的耐电压强度接近常规致密、低氧CuCr触头材料的水平.     

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－5Cr合金的组织性能研究

研究了机械合金化制粉、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粒子达到纳米级。     

微晶CuCr50真空断路器触头材料的研制

采用高能球磨法制取ＣｕＣｒ５０合金粉。在真空炉内热压成致密块体，利用扫描电镜、Ｘ－ｒａｙ衍射仪，能谱仪等考察了球磨过程粉末粒度，形貌的变化，热压块体的显微组织以及其密度随温度时间的变化。     

GCr15电渣钢的热疲劳性能

研究了ＧＣｒ１５电渣钢２０℃＝２５０℃，２０℃＝４５０℃，２０℃＝７５０℃３个连续阶段的热疲劳裂纹的形成与扩展，结果表明，８４０℃淬火，１６０℃回火可使ＧＣｒ１５电渣钢具有较好的热疲劳抗力。     

新型纳米晶合金Fe69.5Cu0.5Cr4V5Si13B8退火过程中微结构的Mossbauer

采用Ｍｏｓｓｂａｕｅｒ、Ｘ－射线衍射等实验方法研究了新型纳米晶合金Ｆｅ６９．５Ｃｕ０．５Ｃｒ４Ｖ５Ｓｉ１Ｂ８退火过程中微结构的变化，实验结果表明，该合金经５４０℃退火４０分钟后能获得优良的综合软磁性能，此时，合金形成双相结构，即具有ＤＯ３型超点阵结构的α－Ｆｅ（Ｓｉ）固溶体超细颗粒和作为晶界的富Ｃｒ、Ｖ、Ｂ等元素呈弱铁磁性的非晶相。超细颗粒的尺寸为２０ｎｍ左右。当退火温度超过６００℃后，残余的非晶     

终扎（锻）温度对1%CrMoV钢的奥氏体晶粒度的影响

本试验通过１％ＣｒＭｏＶ钢奥氏体晶粒度检验中大小晶粒重叠的发现,开展不同奥氏体温度试验,运用奥氏体晶料形成、长大、粗化的基础理论,得出终轧（锻）温度偏高形成粗大的原始奥氏体晶粒,在９２０℃以下的奥氏体化温度处理后的晶粒度检验显示出来,在评级时可不予考虑,而且对试样进行９２０℃至９６０℃处理可消除大小晶粒重叠现象,为正确评定晶粒度级别提供了重要依据。     

回火温度对ZG0Cr13Mn8N钢显微组织的影响

研究了铬以相（马氏体－奥氏体）ＺＧ０Ｃｒ１３Ｍｎ８Ｎ钢在４００～７００℃温度区间内回火后的显策组织。结果表明,ＺＧ０Ｃｒ１３Ｍｎ８Ｎ钢在５８０℃回火时奥氏体量增多;淬火和逆变奥氏体在低于５８０℃回火时都十分稳定,而高于５８０℃回火时则不稳定;随着回火温度的升高,马氏体板条特征愈加不明显,且在板条马氏体和奥氏体内均有Ｍ７Ｃ３型碳化物析出、聚集和长大。     

热处理工艺对CB7Cu—1不锈钢精密铸件性能的影响

ＣＢ７Ｃｕ－１属于马氏体沉淀硬化不锈钢，经１０５０℃固溶处理后，再进行４８０℃，５８０℃时效处理，能独同强度、高度的优良机械性能，满足Ｍｏｒｇａｎ Ｓｔｅｌｍｏｒ冷却线对精密铸件的性能要求。     

纳米晶稀土复合氧化物Dy_(1-x)Sr_xCoO_(3-y)低温形成机理研究

采用溶胶—凝胶工艺制备了纳米晶氧化物Ｄｙ１－ｘＳｒｘＣｏＯ３－ｙ，并对其低温形成机理进行了研究，结果表明：１００～２００℃柠檬酸配体变化不大；３００℃时配合物已开始分解，生成了单齿碳酸盐，同时形成了ＳｒＣｏＯ３－ｙ晶相骨架；４００℃晶化过程出现微区不均匀性；一级相变吉布斯自由能一阶偏微熵的改变，体现为结晶放热过程，整个晶化过程处于一种氧缺陷状态；７００℃时已形成纳米晶氧化物Ｄｙ１－ｘＳｒｘＣｏＯ３－ｙ，低于传统的合成温度。     

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.