微合金元素Cr对高碳钢线材组织性能的影响

研究了微合金元素Cr对高碳钢线材组织性能的影响以及Cr元素的合理加入量，结果表明，微合金元素Cr的加入优化了材料组织构成，减少了组织中先共析铁素体含量，增加了索氏体含量，使线材抗拉强度增加75—100MPa，综合性能得到提高，Cr元素合理加入量应控制在0．18％-0．24％范围内。     

微量Ca,Mg对GH1016合金组织和性能的影响

本文从微量Ｃａ、Ｍｇ对ＧＨ１０１６合金中高温塑性的影响进行了综合研究。结果发现：微量Ｃａ＋Ｍｇ含量从０．００２４～０．００８３％对ＧＨ１０１６合金７５０℃高温拉伸强度影响不大，但Ｃａ＋Ｍｇ含量从０．００５～０．００８３％大大地提高了７５０℃拉伸塑性指标（δ％及Ψ％）；０．００２４～０．００８３％微量Ｃａ＋Ｍｇ对ＧＨ１０１６合金固溶状态析出相总量无多大影响，其量大约在１．５％左右；Ｃａ＋Ｍｇ量为０．００５％的Ｂ试样和Ｃａ＋Ｍｇ量为０．００８３％的Ｆ试样７５０℃高拉后的晶界状态不同，且两试样组织中Ｚ相组成式元素含量有所差别，但从电子探针结果看出Ｚ相中并不含元素Ｍｇ。／／【关键词】     

碳,镍,钼对铸造Fe—Cr—Ni合金高温抗拉强度的影响

当碳含量为０．１０％￣０．７０％时，随碳量增加，Ｆｅ－Ｃｒ－Ｎｉ合金１２５０℃高温抗拉强度显著提高，在碳量大约为０．４０％，时达到峰值，而后急剧下降，同样，镍为１０％和钼为０．３％，合金１２５０℃高温强度最大。     

稀土对白口铸铁组织和性能的影响

本文研究了稀土对白口铸铁组织与性能的影响，微合金化，热处理对白口铸铁性能的改善。研究所用的原铁水成份为Ｃ：２．４～３．０％，ＳｉＯ：３～１．０％，Ｍｎ：～０．５％，Ｐ、Ｓ：＜０．１％，稀土加入量试验范围为０～１．２％ＲＥＳｉＦｅ，结果表明适宜的稀土硅铁加入量为０．８～１．２％。     

低氧化镍矿选择性还原生产炉料级镍铁研究

采用含Ｎｉ０．９１％、ＴＦｅ４７．０７％、Ａｌ２Ｏ３６．１１％、ＭｎＯ０．４４％，Ｃｒ２．６４％的低镍矿作原料，进行选择还原，获得了Ｎｉ２．８５～５．６２％、Ｃｒ≤１．０５％、Ｃ０．０１３％～５．２８％、Ｐ０．０３４％～０．０９８％的炉料级镍铁。本产品可以满足冶炼含镍低合金钢和合金铸铁的需要。经选择还原后的炉渣含铁量为４７．２５～５０．８８％，碱度为０．７５～０．８８，可作为部分自熔性烧结矿加入高炉冶炼生铁。     

Cr—Mo—Ni系新型铸造热锻模具钢的微合金化

向成分（％）：Ｃ０．１￣０．５,Ｃｒ１．０￣５．０,Ｍｏ０．３￣２．０,Ｎｉ１．０￣２．０新型铸造热锻模具钢中加入微合金化元素Ｎｂ、Ｖ、Ｔｉ、ＲＥ、Ｃａ等,细化了晶粒、改善了夹杂物形态及分布。冲击韧性、延伸率、断面收缩率提高了一倍左右,断裂韧性和抗冷热疲劳性能也有明显改善。     

硼对提高合金结构钢淬透性的影响

为提高合金结构钢的淬透性，可把硼作为合金元素加入。以１７ＭｎＣｒＢ５－５表面硬化钢为例，该项研究阐明了微量元素铝、氮和钛对提高硼合金化的合金结构钢淬透性作用的影响，氮含量〉０．００８％时，加．０３５－０．７０％的铝，可防止硼氮化，除添加铝外，还添加钛来化合氮时，较高氮含量也是可行的。     

Cr-Mo-Ni系新型铸造热锻模具钢的微合金化

向成分（％）：Ｃ０１～０５,Ｃｒ１０～５０,Ｍｏ０３～２０,Ｎｉ１０～２０新型铸造热锻模具钢中加入微合金化元素Ｎｂ、Ｖ、Ｔｉ、ＲＥ、Ｃａ等,细化了晶粒、改善了夹杂物形态及分布。冲击韧性、延伸率、断面收缩率提高了一倍左右,断裂韧性和抗冷热疲劳性能也有明显改善。     

氮含量对Cr18Mn18N无磁不锈钢力学性能、磁导率和组织的影响

探讨了Ｃｒ１８Ｍｎ１８Ｎ无磁不锈钢中氮含量对钢的力学性能、磁导性能以及组织状态的影响，研究结果表明，Ｃｒ１８Ｍｎ１８Ｎ钢中氮含量大于０．３１％时，组织才为全奥氏体状态，该钢氮含量的最佳区间为０．４％￣０．６％。     

合金元素对16Cr铁素体铸钢耐热性能的影响

为开发一种铁素体耐铸钢用于发动机排气部件，研究了Ｃ，Ｍｏ，Ｎｂ，Ｖ对其高温屈服强度σ０．２，夏氏冲击韧性，转变温度（ＡＣ１）和高温抗氧化性能的影响。在转变温度以上（２００－３００℃范围内）合金元素对中温韧性影响极大，Ｃ含量从０．０４％增加到０．３％，９００℃时的σ０．２得到显著改善，但３００℃时的中温韧性和ＡＣ１温度降低，加入１％的Ｍｏ，Ｎｂ和Ｖ增大ＡＣ１温度分别为１４０℃，１２０℃和４０℃。增加     

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.