拉拔钨丝工艺过程中抗拉强度的控制

钨丝的抗拉强度是随变形程度增大而增高 ,合理地控制退火工序前后的抗拉强度下降比例是生产高质量钨丝的关键。     

掺杂钨丝抗拉强度对其绕丝性能的影响

研究分析了在确定的工艺条件下 ,掺杂钨丝抗拉强度在加工过程中的变化趋势 ,成品丝材抗拉强度对其绕丝性能的影响。指出掺杂钨丝抗拉强度在生产、使用中存在着的一个安全区 ,在安全区内掺杂钨丝绕丝开裂率可控制在3%以下     

美国218牌号钨丝的细丝拉伸工艺

介绍了著名的美国２１８牌号钨丝的细丝拉伸工艺，并对细钨丝生产过程中的质量控制进行了探讨。     

钨丝的再结晶温度及高温性能测试

钨丝的再结晶温度及高温性能测试系统由主机、试样室、真空机组、加热电源、测温、测力及测下垂装置等主要部分构成。用本系统可以测试钨丝的多种性能:再结晶温度、高温抗下垂及高温抗拉强度等。同时还可测试片材和棒材的高温抗拉强度。可供试验的温度范围大,其上限可达3480℃。以直接通电加热方式,在真空度优于1×10~(-4)托的真空室内加热试样,用光学高温计测量温度,显示试样承载能力的拉伸曲线由 X—Y 记录仪自动绘制。本文给出某钨丝厂216批掺杂WA1—1丝的实测结果。金相、x 光,电镜及维氏硬度的工作证明了所测的再结晶温度是可靠的,文章还描述了钨丝断口电镜扫描宏观形貌和微观花样特征。     

掺杂钨丝基础研究和质量评价技术的突破性进展

以控制和提高掺杂钨丝的性能为目的,研究了影响掺杂钨丝质量的微观结构本质和提高性能的机理,介绍了掺杂钨丝的质量评价在线监控技术,为制订掺杂钨丝的生产工艺和进行质量控提供了理论依据。     

中国钨丝加工业的现状

详细介绍了我国钨丝加工业的生产、品种、质量、设备以及外贸、科技创新等方面的现状，展望了钨丝加工业的发展方向。     

钨丝生产技术浅析

本文介绍了钨丝的用途以及我国钨丝产业的发展与现状，阐述了钨丝加工技术的特点，并展望了钨丝生产技术的发展趋势。     

中国钨丝加工业的现状

详细介绍了我国钨丝加工业的生产、品种、质量、设备以及外贸、科技创新等方面的现状,展望了钨丝加工业的发展方向.     

D0.2mm直钨丝的研制与生产

对钨丝矫直的基本机理进行了探讨，指出钨丝矫直的过程实际为弹-塑性弯曲变形。采用本文的试验方法，可生产出满足特殊要求的矫直钨丝。     

关于钨丝质量

苏联从1980年起在全国范围内开展了关于钨丝质量的讨论,各方面专家在讨论中发表的文章及意见对提高钨丝质量具有重要的意义。苏联《有色金属》杂志1983年第10期特转载了《照明工程》杂志上发表的总结性文章关于钨丝质量。本刊特将这篇文章及《(?)硬质合金公司》总工程师多洛尼金的文章译出,供同志们参考。     

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.