低磁场特性优良的无取向电工钢板开发成功

1前言日本开发成功低磁场特性优良的半工艺无取向电工钢板。成分范围为Si＜1%~3．5％，Al＜O．004%,Mn0．l％~0．8％，P＜0．2％，S＜0．02％，C＜0．005％，N＜O．005％的钢板。通过限定该钢板中所含夹杂物的大小及数量，直径O.1－1m的数量为500－5000个／mm2，直径1－7．5m的为200个／mm2以下，使磁性退火后低磁场领域下的磁感及铁损大幅度得到改善。2以往研制状况及存在的问题小型马达，特别是交流马达、功率驱动马达。小型控制用马达等，重视响应性，作为铁芯材料使用的电工钢板，要求磁化曲线陡直，即要求低磁场领域的磁感高。对…     

微合金钢中板热轧时晶粒尺寸的模拟计算

通过Φ180mm× 2 0 0mm二辊实验轧机对成分 (% )为 0 0 5 3C 1 5 6Mn 0 0 4 6Nb 0 2 5Mo 0 0 14Ti 0 0 0 12B微合金化钢的轧制实验 ,验证了新建立的热轧板带晶粒尺寸的仿真模拟系统 ,得出晶粒尺寸的仿真计算值与实测值的相对误差≤ 8 3% ,并对该微合金钢 9道次 2 2 0 0mm× 14mm中板轧制时各道次钢板晶粒尺寸进行了计算。结果表明 ,精轧各道次均没有发生动态再结晶 ,在板厚 5 1 6mm轧至 2 2 0mm的 1～ 5道次 ,晶粒尺寸显著减小 ,由 4 5 μm降至 10 μm ,在板厚 2 2 0mm轧至 14 0mm的 6～ 9道次 ,晶粒尺寸减小不显著 ,由10 μm降至 7 5 μm     

具有高硬度外层的耐磨铁合金工作辊

这种铁合金具有很好的耐冲击性能,它是以贝氏体为基体的合金材料,其化学成分为,％：C 1．5～3．5,Si≤1．5,Mn＜1．2,Cr≤12．0。Mo≤8．0,V 3．0～10．0,Nb≤7．0：以下元素任选一种或几种：Ni≤5．5．Co≤10．0．Cu≤2．0．W≤2．0．Ti≤2．0,Zr≤2．0,B≤0．1。弥散分布的细小碳化物颗粒占1％～10％,其粒径为1～10μm。该铁合金轧辊表面层的成分为,％：C 2．1．Si 0．4．Mn 0．3,P 0．02,S 0．01,Ni 0．5,Cr 6．2,Mo 2．8,V 5．2．Nb 1．5。将此轧辊用于生产带钢的热轧机上．轧辊表面不易磨损。这一技术已由日本川崎钢公司申请并获得了本国的发明专利权。     

新的铁水高速喷粉脱S技术的开发

本钢用30t EBT 40tLF 40t VD→3．16t锭热送→800轧机生产Φ170mm、Φ160mm曲轴用仿SAE1548钢。成分(％)：0．46～0．52C，0．15～0．35Si，1．20～1．40Mn，0．10～0．25Cr。     

本钢研制曲轴用仿SAE1548钢

本钢用30t EBT 40tLF 40t VD→3．16t锭热送→800轧机生产Φ170mm、Φ160mm曲轴用仿SAE1548钢。成分(％)：0．46～0．52C，0．15～0．35Si，1．20～1．40Mn，0．10～0．25Cr。     

机械性能好，抗弯强度高的钢—铝—钢层压板的生产

这是一种由日本大和钢公司发明的专利技术，该层压板中的铝板夹在2层低碳钢板之间，钢板的化学成分大致为，％：C 0．0005～0．01，Si＜0．1，Mn 0．04～0．5．P＜0．1．Al 0．002～0．1，N＜0．005，Ti 0．0015～0．15。在进行钢板的层压时，先将钢板与铝板加热．钢板的加热温度为670～900℃．铝板的加热温度低于550℃；层压中的压下量分别为：钢板＜5％，铝板＞2％。层压完毕的成品板的冷却既可采用空冷．也可以采用急冷。     

HQ590DB超低碳贝氏体钢中厚板的研制

采用 18 0t转炉 RH LF(Ca处理 ) 连铸坯 (mm) :2 30 (30 0 )× 16 5 0× 6 0 0 0 4 30 0轧机控轧控冷工艺试制了HQ5 90DB超低碳贝氏体钢 (% ) :0 0 5C ,1 5Mn ,0 0 4Nb ,0 0 2Ti,≤ 0 0 0 0 2B的 30～ 4 0mm中板。连铸坯的 [H]1 7× 10 - 6 ,[O]2 1× 10 - 6 ,[N]2 9× 10 - 6 。终轧温度 80 0～ 85 0℃ ,控制终冷温度 5 90～ 6 30℃ ,获得铁素体 板条状贝氏体组织 ,钢板抗拉强度σb6 5 0～ 6 90MPa ,屈服强度σ0 .2 4 90～ 5 90MPa ,延伸率δ52 0 % ,并具有良好的成形性能。     

石模特钢65t Consteel EBT EAF—LF—CC流程生产焊线钢H11Mn2SiA的工艺实践

采用60％铁水＋优质废钢，Consteel电弧炉偏心底炉出钢留渣作业，控制出钢终点[C]0．035％～0．050％、出钢[P]≤0．012％；LF用低碱度渣精炼，喂硅钙线，LF精炼后软吹氩15min；150mm×150mm方坯连铸时。采用全保护自动控制浇铸和结晶器、铸坯凝固末端电磁搅拌，使所生产的H11Mn2SiA焊线钢（％：0．06～6．09C、0．82．1．00Si、1．45—1．70Mn）的平均氧含量为20×10^-6，Ф5．5mm盘条不经热处理可直接冷拔至Ф1.0mm不断丝。     

高塑性 Cr-Mn-Ni-Cu-N 奥氏体不锈钢 YGA201的研制

在实验室采用200 kg非真空感应炉研制了成分(％)为:≤0．10C,5．0-9．5Mn,16．0-19．0Cr, 3.5～5.5Ni,1．0～2.0Cu,≤0.2N的奥氏体不锈钢YGA201。力学性能和腐蚀试验结果表明,YGA201不锈钢含1．0％-2．0％Cu,使其1 050℃固溶处理后的延伸率达60％,高于ASTM201不锈钢(延伸率44％),该钢热加工性能和1 mol／L H₂SO₄中的耐腐蚀性能与SUS304(18Cr-8Ni)不锈钢相当。     

新型低合金铸态复相耐磨钢的组织与性能

开发了一种新型多元合金化铸态复相耐磨钢，化学成分（％）：0．30－0．45C，1．5－3．0Mn，0．8－1．5Cr，0．8－1．2Si，0．2－0．8Mo，0．10－0．25V，0．50－0．10Ti，0．005－0．012B，该新型耐磨钢为马氏体、下贝氏体加薄膜状残余奥氏体的复相组织，具有良好的冲击韧性。     

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.