硬面堆焊复合制造板轧矫直辊研究

采用研制的３４ＣｒＭｏ２ＭｎＶ合金堆焊复合制造２０、５０ｍｍ钢板轧机硬面系列矫直辊，结果表明：较之原５５Ｃｒ辊，使用寿命提高５倍以上，板坯表面质量大为改善。简介了５５Ｃｒ矫直辊的失效机理，高碱度陶质焊剂的配方，以３４Ｃｒ４Ｍｏ２ＭｎＶ堆焊合金的硬度、金相组织以及该合金硬面矫直辊的堆焊复合制造工艺。     

双辊薄带连铸实验钢种的产业化问题

本文主要对双辊薄带坯连铸实验钢种的产业化问题进行了讨论。认为用１Ｃｒ１８Ｎｉ９和２Ｃｒ１３、ＰＨ１５－７Ｍｏ连铸薄带坯生产出的冷轧带钢质量可达到国家有关标准，但要实现产业化还有些问题需要解决。高钼奥氏体不锈钢（６＾Ｍｏ）适于双辊薄带坯连铸，硅钢和高速钢则还不能作道先产业化的考虑。     

连铸辊堆焊的试验研究

通过堆焊试验研究，认为采用１Ｇｒ１３ＮｉＭｏ焊带配以ＳＪ－１１焊剂进行自动埋弧堆焊，无论采用周向环堆还是轴向直堆，均可获得性能优良的焊层，完全满足连铸辊的使用要求。     

热轧辊堆焊材料及工艺研究

研究了Ｃｒ－Ｗ－Ｖ和Ｃｒ－Ｍｏ－Ｖ堆焊金属在热疲劳试验过程中组织的变化行为以及化学成分和组织对耐热疲劳性能和耐磨性能的影响，并制定了合理可行的夹送辊和助卷辊的堆焊工艺，研究结果表明，起弥散强化作用的钨的碳化物在热疲劳试验过程中易于聚集长大，从而降低热疲劳强度，在Ｃｒ－Ｍｏ－Ｖ堆焊金属中加入小于１％的镍，会提高热疲劳性能，但加入过多的镍则显著降低相变温度（Ａｃ１）并对耐磨性不利；基体组织为均一，稳定     

六辊轧机中间辊用钢接触疲劳性能研究

采用金相、ＴＥＭ、ＸＲＤ等手段研究了六辊轧机中间辊用５５Ｃｒ５ＮｉＭｏＶ及７０Ｃｒ３Ｍｏ钢的接触疲劳性能。结果表明：５５Ｃｒ５ＮｉＭｏＶ钢的接触疲劳性能明显高于传统的７０Ｃｒ３０Ｍｏ钢。５５Ｃｒ５ＮｉＭｏＶ钢组织中的残 奥氏体量较７０Ｃｒ３Ｍｏ钢接触疲劳过程中,残余奥氏体发生应变诱发马氏体转变,这种应变诱发转变可抑制并阻碍疲劳裂纹的产生和扩展。     

CrMo新轴承钢的热处理工艺与性能

研究了铬轴承钢ＧＣｒ１５ＳｉＭｎ和新开发的Ｃｒ－Ｍｏ轴承钢的ＧＣｒ１５Ｍｏ和ＧＣｒ１６Ｍｏ的热处理工艺和性能。结果表明，ＧＣｒ１５Ｍｏ钢的淬透性低于ＧＣｒ１５ＳｉＭｎ多，但ＧＣｒ１６Ｍｏ钢的淬透性高于ＧＣｒ１５ＳｉＭｎ钢，ＧＣｒ１５Ｍｏ和ＧＣｒ１６Ｍｏ新钢种的机械性能和接触疲劳寿命均高于ＧＣｒ１５ＳｉＭｎ新钢种适合于制作重型机械用轴承。     

美国林肯焊丝在板坯连铸辊复合堆焊中的应用

选用美国林肯电气公司焊接设备和技术以及焊丝，对板坯连铸辊进行堆焊。介绍了连铸辊复合堆焊方法和堆焊工艺参数，堆焊辊比未堆焊辊提高寿命１－２倍。     

稀土元素对热轧辊用钢60CrMnMo热疲劳性能的影响

本文研究了稀土元素对热轧辊用钢６０ＣｒＭｎＭｏ热疲劳性能的影响，同时对不同稀土含量的６０ＣｒＭｎＭｏ钢高温短时拉伸性能和硬度进行了比较。试验结果表明：稀土元素可明显提高６０ＣｒＭｎＭｏ钢的热疲劳寿命和塑性，抑制６０ＣｒＭｎＭｏ钢的循环软化，并得出稀土元素的合适含量为０．０５％－０．１０％。     

明弧堆焊工艺研究及在连铸辊上的应用

介绍了明弧堆焊的原理和特点，针对连铸辊使用工况和失效形式，合理设计和制定了明弧堆焊材料与工艺，对不同焊后热处理的试样进行了组织，机械性能和耐磨性等试验分析，结果表明，1^#试样的综合性能最好，更适合于连铸辊的实际工况要求。使用结果表明，明弧堆焊连铸辊使用寿命是埋弧堆焊连铸辊使用寿命的2倍以上。     

攀钢轨梁厂现行轧辊堆焊工艺改进研究

通过对４种材料匹配的堆焊层化学成分、硬度、耐磨性、金相组织的分析，选择Ｈ２５Ｃｒ３Ｍｏ２ＭｎＶ＋ＨＪ２６０作为堆焊材料，并确定了相应的预热温度、回火温度及回火时间。     

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.