2195铝锂合金轧制工艺研究

通过2195铝锂合金热轧、中间退火及冷轧试验，确立了合金适宜的热轧加热温度和退火温度，认为该合金冷轧变形量在不大于60％范围内对成品板材力学性能影响不大。     

2099铝锂合金均匀化退火的微观组织及Al3Zr析出分析

研究2099铝锂合金铸态及均匀化处理后的微观组织和成分分布以及该合金最佳均匀化处理状态时Al3Zr的析出情况。结果表明:2099铝锂合金铸态的微观组织存在严重的枝晶偏析,很多低熔点共晶相分布在晶界,合金中Cu和Mg元素在晶界分布不均匀;经过一系列不同温度和时间的均匀化处理后,2099铝锂合金铸态微观组织中的非平衡相逐渐溶解,各元素分布趋于均匀;2099铝锂合金的过烧温度为515℃,最佳的均匀化制度为505℃/24 h;经该制度均匀化处理后,Al2CuMg、Al2CuLi和AlLi相大部分回溶进α(Al)基体中,通过透射电镜可观察到Al3Zr析出相以及α(Al)基体的超点阵结构;并且该均匀化制度与均匀化动力学方程得到的结论基本一致。     

预先退火工艺对2A96铝锂合金组织和性能的影响

研究了预先退火温度和保温时间对2A96铝锂合金的力学性能和组织的影响,确定了该合金的预先退火工艺为460℃/2h,在工业化生产中已经得到了应用。     

固态1420铝锂合金中氢的测定方法的研究

介绍利用ＰＨ－４０２测氢仪（载气熔融法）分析固态１４２０铝锂合金中氢含量的方法，重点研究了试样的制备、有效地除尽表面氢以及使体内氢充分释放出来同时又避免高挥发性物质锂的影响，建立一套准确测定固态１４２０铝锂合金中氢的方法。     

时效工艺对2297铝锂合金组织与力学性能的影响

对热轧态2297铝锂合金进行530℃/1 h固溶处理后立即水淬,然后在不同温度(150~180℃)和时间(0~160h)条件下进行时效热处理,利用透射电镜观察合金的微观组织,并测定合金的抗拉强度(σb)、屈服强度(σ0.2)和伸长率(δ),研究时效温度与时间对2297铝锂合金组织与性能的影响。结果表明:合金的强度随时效时间延长而升高,达到峰值后趋于稳定。随时效温度升高,合金强度达到峰值的时间逐渐缩短,峰值强度先升高后降低,塑性则随时效时间延长或时效温度升高而逐渐下降。时效温度为160℃时,时效初期合金的主要析出相为δ′相,峰时效态合金是T_1相、θ′相和δ′相共同强化,过时效态合金的主要析出相为T_1相。时效温度为180℃时,合金的主要析出相为T_1相,θ′相和δ′相的数量非常少。     

DP780QX双相钢CCT曲线分析

以DP780QX双相钢为研究对象，模拟研究了铸坯加热温度、铸坯保温时间、卷取温度、终轧温度等对其相变膨胀总量、膨胀速度、百分比以及抗拉强度的影响规律，并在此基础上进行了生产实践。模拟结果显示，热轧时的铸坯加热温度、铸坯保温时间、终轧温度、卷取温度(约620℃)等均不会对DP780QX热轧板的抗拉强度造成明显的影响；相变在569～456℃即已全部完成，其组织为铁素体+贝氏体，620℃卷取时抗拉强度约820 MPa,发生塌卷的可能性很小。实际生产中DP780QX热轧板强度波动较大的原因可能是热取样时间节点不一致。     

均匀化退火工艺对01420A1－Li合金加工性能及力学性能的影响

本文研究了均匀化退火工艺对０１４２０铝锂合金热加工性能和力学性能的影。结果表明：均匀比工艺时合金性能的影响很大，均匀比不足或过烧都会造成合金的热轧开裂和塑性降低，经４７５℃，４８小时的退火后，主合金元素Ｍｇ在晶内的分布均匀，合金可获得最好的综合性能。     

均匀化退火工艺对01420Al／Li合金加工性能及力学性能的影响

本文研究了均匀化退火工艺对０１４２０铝锂合金热加性能和力学性能的影响。结果表明：均匀化工艺对合金性能的影响很大，均匀化不足或过烧都会造成合金的热轧开裂和塑性降低，经４７５℃，４８小时的退火后，主合金元素Ｍｇ在晶内的分布均匀，合金可获得最好的综合性能。     

导热性能高的铝硅合金的制造方法

本专利提供一种铝硅铸造合金，它既有一般铝硅合金较高的力学性能，又具有较好的铸造性能。铝合金中含有6．0％～8．0％硅，除了铝和硅以外，其它单个金属元素含量均在0．6％以下。硅在铝中的固溶量为0．5％～1．1％，同时通过加热到400-510℃且保温1小时，可以使金属显微组织内的晶体物析出量达到5％～8％。     

石油钻铤用4145H热轧圆钢用Φ600 mm圆坯加热装炉优化

以石油钻铤用4145H热轧圆钢为研究对象，在加热炉预热段温度较高（870～920℃）的工况条件下，设计出一种温送温装工艺：入炉前铸坯表面温度控制在200～400℃，预热段时间≥120 min，升温段温度950～1 050℃，保温时间≥60 min，高温段1 220～1 280℃，保温时间≥240 min，总加热时间≥510 min。通过工艺试验，采用Φ600 mm连铸圆坯轧制Φ260 mm圆钢，对比热送热装、温送温装、冷送冷装三种入炉方式下热轧圆钢的质量情况，得出温送温装工艺可以获得良好的表面质量和内部质量。     

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.