纯钼及钼合金板材轧制加工工艺概述

阐述了钼及钼合金轧制加工工艺过程。从总变形量、道次变形量、轧制温度、轧制方式以及退火温度方面,总结了轧制加工主要工艺因素对轧制件质量及性能的影响规律,探讨了各工艺因素在轧制加工中对产品性能的综合作用,展望了钼板材轧制的发展。     

影响双金属轧制复合结合强度的工艺因素综述

界面结合强度是双金属层状复合材料的关键技术指标,为了探讨"三步法"轧制复合工艺,本文从表面处理、轧制温度、轧制变形率、轧制速度以及退火温度和退火时间方面,综述了轧制复合工艺因素对复合板结合强度的影响规律,这对双金属复合轧制的生产具有一定的指导意义。     

冷轧微碳钢工艺参数对深冲性能的影响

通过轧制试验和性能检测,得到了冷轧微碳钢轧制工艺参数和退火温度对深冲性能的影响关系。通过X射线衍射仪测定了轧制织构,并且进行了ODF定量分析,使检测的塑性应变比r^-值与织构分析一致,为制定冷轧微碳钢的轧制和退火工艺参数提供了依据。     

热加工工艺对Ti70板材组织和力学性能的影响

文章对Ti70钛合金进行了不同轧制工艺条件下的轧制试验，并结合后续的退火试验，对不同轧制工艺以及热处理工艺对板材的微观组织、力学性能的影响进行了表征分析。轧制工艺条件主要包括火次加热温度、单道次变形量、成品热处理温度。试验结果表明适当降低成品火次轧制温度，在较低温度下发生了较大变形，畸变能大、形核点多，因而随后退火后再结晶更加充分，组织更细小、均匀，α相等轴化程度更高，能够有效提高板材强度约30 MPa。同时采用700℃热处理时，板材强度和塑性匹配较好。     

GCr15球化退火行为和力学性能的研究

采用等温球化退火和周期球化退火工艺分别研究了常规轧制（CR）和控轧控冷（TMCP）的GCr15钢的球化退火行为和力学性能。结果表明,轧制工艺对GCr15钢组织影响显著;在等温球化退火处理制度下常规轧制（CR）和控轧控冷（TMCP）试样球化效果差别较小;在周期球化退火处理制度下,控轧控冷（TMCP）试样可获得细小均匀的球化组织,其球化效果明显优于常规轧制（CR）试样,且球化退火时间比宝钢特钢现行的等温球化退火工艺缩短了6 h,可显著提高生产效率。     

铝箔成品油粘的原因分析与消除措施

本文从轧制工艺、板形、轧辊磨削、轧制油、分切、退火工艺等方面分析铝箔退火后出现油粘(粘附)的原因,并提出了相应的解决办法和消除措施.     

加工工艺对交叉钼片性能的影响

讨论了轧制工艺(换向工艺)、成品退火工艺对钼片性能(力学性能、深冲性能、硬度等)的影响。对比试验表明，本研究所采用的轧制工艺和退火工艺较常规生产工艺大大提高了钼片的性能。     

冷轧罩式炉退火卷黑带产生的原因及防范措施

针对八钢冷轧罩式炉退火钢卷产生大量黑带的原因进行分析,制定了避免黑带产生的具体方案,优化退火吹氢工艺,使氢气吹扫时间和吹氢量与轧制油的挥发速度相匹配,从而有效改善了板面质量,减轻黑带.     

轧制及退火工艺对高速钢淬火晶粒度及性能的影响

本文系统地研究了轧制及退火工艺对高速钢淬火晶粒度及性能的影响。发现:(1)轧前退火对高速钢淬火晶粒度及性能无明显影响;(2)轧后回火式退火或不退火的钢材,当轧制温度低于1050℃,变形量大于50％,淬火温度较低时,淬火晶粒细小,机械性能较好。当轧制温度高于1150℃,变形量小于30％、淬火温度较高时,将产生淬火晶粒不连续长大,机械性能不好;(3)轧后相变退火的钢材,淬火晶粒随温度升高均匀长大;(4)淬火晶粒度与M_6C碳化物的数量、大小、间距及位错、亚晶有关。     

铸轧镁合金薄带可轧工艺特性的实验研究

为了确定适合的均匀化退火制度,进行了均匀化退火实验以及轧制实验,以确定适合的开轧条件.根据均匀化退火后的金相显微组织图,确定了可轧的退火工艺.并在此基础上进行轧制实验,验证退火制度的合理性.     

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.