火法再生W、Mo、Cr及V合金的研究

介绍了采用火法回收高速钢磨屑中的W、Mo、Cr、V并冶炼生产再生合金的原理、特点及工艺过程。就原料粒度、还原剂、石灰等对回收率的影响进行了研究分析。结果表明：采用火法冶炼回收工艺是可行的，W、Mo回收率在96％以上,Cr回收率大于91％．V回收率不低于91％。冶炼出的再生合金产品质量稳定，可满足炼钢使用要求。     

高速钢磨屑再生合金基料的试验研究

介绍了采用硅热法回收高速钢磨屑中的W，Mo,Cr,V并冶炼再生合金基料的原理及工艺过程，对原料粒度，还原剂，石灰及单位热效应对回收率的影响进行了分析研究。研究结果表明：采用硅热法回收工艺是可行的，W，Mo回收率在95％以上，Cr回收率大于55％，V回收率不低于20％，冶炼出的产品质量稳定，可满足炼钢使用要求，充分做到了废物利用，具有明显的经济效益和社会效益。     

近全致密高W或Mo含量W—Cu或Mo—Cu复合材料的制备方法

一种近全致密高W含量W—Cu复合材料与高Mo含量Mo—Cu复合材料的制备方法,属于粉末冶金技术领域。W—Cu或Mo—Cu复合材料的组成成分为：W-5％-35％（质量分数）Cu或Mo-10—45％（质量分数）Cu;复合材料中的W或Mo粉采用粒度配比的方法进行调制,制备所要求成分的W—Cu或Mo—Cu混合粉末;将W—Cu或Mo—Cu混合粉末放入热压模具中,进行压制、烧结;     

热处理对Cr8Mo2WSiV工模具钢组织和性能的影响

试验了淬、回火温度对成分为(％)：0．95C，0．93Si，7．94Cr，1．93Mo，0．92W，0．25V的工模具钢Cr8Mo2WSiV的组织和硬度的影响。结果表明Cr8Mo2WSiV钢1050℃淬火组织为马氏体、块粒状碳化物和少量残余奥氏体，1050℃淬火，520℃回火后，钢的HRC硬度值可达63，并具有较好的韧性。     

Nb含量对W3M02Cr4V（Nb）高速钢组织和力学性能的影响

研究了0—1．5％Nb对25kg真空感应炉冶炼的W3M02Cr4V钢（％：0．8～1．1C、3．8～4.1Cr、2.9-3．2W、1．8-2．1Mo、1．0-1．3V）组织和力学性能的影响。试验结果表明：随着Nb含量提高，铸态组织中铌碳化物增多；淬火奥氏体晶粒变细；1180℃淬火时，1．2％-1．5％Nb钢比≤0．1％Nb钢HRC值提高了6．0；二次硬化能力和红硬性也得到了提高；使钢在较高淬火温度下的机械性能得到改善。     

热作模具钢3Cr2W8V以轧代锻工艺研究

五钢公司年产热作模具钢3Cr2W8V约3500吨，近年沿用传统的锻造开坯工艺生产成本高，生产率低，严重影响该钢种的生产经济效益。本文论述了3Cr2W8V以轧代锻工艺的研究过程，通过采用Gleeble 1500热模拟机模拟了3Cr2W8V在高温情况下的σb值和R．A．值，确定了最佳轧制温度1140～1200℃，制定了相应的初轧加热工艺制度和初轧机压下规程，并对此进行验算。又通过热剪机能力分析，确定了热剪温度≥950℃，最大轧制规格180方mm.截止2002年5月31日，初轧以轧代锻生产3Cr2W8V共3444．175吨，合格率99．79％，成坯率86．48％，共计节约成本创汇393．30万元。     

硅热法回收高速钢磨屑的研究

介绍了硅热法冶炼高速钢磨屑生产复合合金的原理及工艺过程，对原料粒度、还原剂、石灰及单位热效应对回收率的影响进行了分析研究。结果表明：W、Mo回收率在95%以上，Cr回收率大于55%，V回收率不低于20%，产品质量稳定，可满足炼钢使用要求，具有明显的经济效益和社会效益。     

硫酸肼还原-钒酸铵滴定法测定尾矿中钼

矿样经酸分解后，用硫酸肼还原，将Mo（Ⅵ）还原为Mo（Ⅴ），用8-羟基喹啉除去过量的硫酸肼，然后以钒试剂为指示剂，用钒酸铵滴定Mo（Ⅴ）。方法应用于尾矿样品中钼的测定，加标回收率为99．33％-102．00％，对含钼（质量分数）3．54％的样品重复测定5次，RSD为0．51％；适用于1％以上钼的测定。     

提高焦炭热态性能的研究与应用

为提高焦炭热态性能，济钢焦化厂利用小焦炉试验和大工业焦炉试验，确定了主焦煤矿点及适应1750m^3大高炉用焦的配煤结构：1／3焦煤25％、肥煤25％、焦煤35％、瘦煤15％，与原生产配比相比，焦炭热态反应性平均降低4．6％，反应后强度平均提高4．3％．     

3Cr2W8V电渣钢力学性能与热震性

13Cr2W8V电渣钢的生产与试验条件采用南京梅山特种钢厂生产的3Cr2W8V电渣钢作为试验分析试样，其生产工艺流程为原材料→中频感应熔炼→电渣重熔→退火→锻造→退火→入库。试验试样取自锻造退火后的锻块，其化学成分为：0．39％C，0．16％Si，0．29％Mn，2．55％Cr，7．95％W，0．34％V，＜0．03％S，＜0．03％P．力学性能试样尺寸按标准进行加工（每一性能3支试样），热疲劳性能试验采用Φ30mm×5mm，边缘带有深度为2mm槽口的圆片试样。试样热处理后，进行各种测试，冲击试样经1050℃油淬，580℃和560℃回火，其余试样经1100℃油淬…     

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.