添加Mn和Cr对Cu-9Ni-6Sn合金组织与性能的影响

对中频真空熔铸含Mn量为0．76wt％～1．05wt％和Cr量为0．19wt％～0．2lwt％的Cu-9Ni-6Sn合金的铸锭组织、时效和形变时效特征及其组织变化作了研究。实验证明：(1)0．76wt％～1．05wt％Mn、0．19wt％～0．2lwt％Cr能完全固溶于Cu-9Ni-6Sn合金中；(2)含少量的Mn、Cr的合金的铸锭组织、时效硬化、形变时效和组织变化等基本特征与不含Mn、Cr的合金相类似，但少量Mn、Cr促进合金时效、形变时效过程，提高最佳时效温度，增加硬化效果和盐酸、硫酸水溶液中的耐蚀性。     

阀座用烧结合金、阀座及其制备方法

阀座用烧结合金含有：1％～2％(质量分数，下同)碳，3．5％～4．7％铬，4．5％～6．5％钼，5．2％～7．0％钨，1．5％～3．2％钒，余者为铁和不可避免的杂质。在分布有碳化物的烧结合金构架基体中分散着1％～3％顽火石粒子、15％～25％的维氏硬度为500～900的硬质合金粒子(A)以及5％～15％的维氏硬度为1000或更高的硬质合金粒子(B)(A B：35％或更低)。     

精炼埋弧渣系对60 t钢包炉(LF)钢水升温速度的影响

在55～75kg实验钢包炉精炼渣系的研究基础上，采用组成(％)为：63．6～70．0石灰，22．7725．0高铝矾土，5．0～13．6萤石(S1渣)；60．0～66．7石灰，20．8～25．0萤石，12．5～15．0火砖块(S2渣)；55．5～65．0石灰，35．0～44．5萤石(S3渣)3种渣系进行60t LF精炼渣埋弧工业试验，所精炼的钢种为20，20G，40Cr，35-CrMoA和GCr15。结果表明，用3种渣系钢水平均脱硫率均为87％，LF在采用S1、S2、S3渣系精炼时钢水平均升温速度分别为3．84℃/min、2．86℃/min和2．48℃/min。S1渣的脱硫速度快，从而缩短了精炼时间。     

珠钢150 t EAF-LF-CSP工艺X60管线钢的开发

珠钢用150tEAF-LF-50—60mm板坯连铸机-热连轧工艺和Nb-Ti复合微合金化技术开发了9．50mm带X60管线钢（％：0．03-0．07C，1．2—1．6Mn，Nb＋V＋Ti≤0．15）。检验结果表明，钢带组织为铁素体＋少量珠光体，晶粒度11．5—12．0级，带状组织≤1．5级，屈服强度440-505MPa，0℃夏比冲击功为140—270J，其综合性能满足API-5L技术标准和工程使用要求。     

今年一季度全球生产粗钢2．67亿t

据国际钢协统计，全球62个主要产钢国(地区)3月份产钢9285．9万t，同比增长6．5％；1～3月份累计产钢26720．2万t，同比增长6．5％。按地区计，3月份和一季度钢产量如下：欧盟25国1640．2万t，与去年同期持平，(4796．2万t，同比降0．3％——括弧内数据为一季度产量，下同)；其他欧洲国家238万t，降4．4％，(682．9万t，降1．6％)；独联体6国971．5万t，同比增1．0％，(2761．9万t，降0．2％)；北美1100．4万t，降3．1％，(3241．9万t，增0．3％)；南美392万t，增1．5％，(1121．2万t，增0．3％)；非洲151．8万t，增18．7％，(433．8万t，增10．8％)；中东122．3万t，增12．5％，(357．8万t，增9．4％)；     

专利名称：铬钢合金

本发明涉及一种含有0．4％～0．75％碳，0．4％～1．6％锰，12％～19％铬，最高0．2％镍，最高0．7％硅，0．5％～1．5％钼，最高1．5％钨，0．05％～0．3％钒和(％Ti／％Nb)，0．02％～0．15％硫，最高0．1％氮，最高0．008％硼，其余是铁和冶炼引起的杂质的铬钢合金。这种铬钢合金以优良的加工性能，耐腐蚀性能，耐磨损性能，高至300℃或更高的耐热性能以及高的刚性而出众。     

钢管热连轧机架耐磨复合衬板的研制

研制了基板-10mm厚成分(％)为0．15～0．20C，0．8～1．5Mn的16Mn钢板与复板-成分(％)为0.6～1.0C，0.5～1．0Si，0．8～1.2Mn，0，5～1．5Cr，0．4～0．6Ni，0．4～0．8Mo，0．005～0．015B，0．05～0．10Y，0．08～0.15K，0．08～0．15Na的耐磨钢板经爆炸焊接工艺制成钢管热连轧机架耐磨复合衬板。复合衬板试验和应用结果表明，钢板复层表面硬度HRC60，结合层剪切强度340MPa，使用8月个后的磨损量小于0．2mm，比常用表面处理衬板和轧制复合衬板磨损量低2倍以上。     

抗氧化和防腐蚀的含钼奥氏体不锈钢

一种奥氏体不锈钢，包含17％～23％(质量分数，下同)铬，19％～23％镍，1～6％钼。在本发明铁基合金中添加钼增强了其耐高温腐蚀性。奥氏体不锈钢可以主要由17％～23％铬，19％～23％镍，1～6％钼，0～0．1％碳，0～1．5％锰，0～0．05％磷，0～0．002％硫，0～1．0％硅，0．15％～0．6％钛，0．15％～0．6％铝，0～0．75％铜，铁和不可避免的杂质所构成。本发明的奥氏体不锈钢在高达至少1500℃的温度下具有增强的耐盐腐蚀性。     

Nb、Ti对高强度耐候钢组织和性能的影响

为模拟CSP(紧凑式带材生产)工艺，由实验室10kg真空感应炉冶炼后轧成6mm钢板，试验研究了Nb、Ti对成分(％)为0．060～0．076C，0．25～0．31Cu，0．45～0．56Cr，0．29～0．30Ni的400MPa和460MPa级高强度耐候钢组织和性能的影响。结果表明，含0．03％Ti钢σa和σb分别为450MPa和545MPa，含0．03％Nb、0．02％Ti钢σa和σb分别为550MPa和615MPa，不含Nb、Ti钢σa和σb仅为375MPa和480MPa。400MPa级耐候钢的组织为铁索体 少量珠光体，含Ti钢的主要析出物为CuS2(20～25nm)和TiN(80nm)，含Nb、Ti460MPa级钢的组织主要为粒状贝氏体，析出物CuS2和(NbTi)CN(30～60nm)，从而提高了钢的强度。     

热处理对5Cr5MoSiV钢组织和性能的影响

研究了淬火和回火温度对全断面隧道掘进机盘形滚刀用5C15MoSiV钢(0．50～0．55C，4．5～5．5Cr，0．8～1．2Si，0．8～1．5Mo，0．6～1．2V)组织、硬度和耐磨性的影响，该钢在1020℃淬火 500℃两次回火可获得最高的硬度；而在1060℃淬火 530℃两次回火可获得较好的耐磨性。     

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.