耐火H型钢翼缘与腹板力学性能差异的分析及优化

应用显微组织分析、MARC有限元温度场分析、绘制CCT曲线等方法,对耐火H型钢翼缘与腹板力学性能的差异产生的原因进行了分析.结果表明:耐火H型钢的翼缘与腹板力学性能差异较大是由于冷却速度不均匀所致,优化耐火钢的钼含量可解决这一问题.     

攀钢新型建筑用钢耐火性能试验研究

对攀钢研制的345MPa级耐火钢及Q345对比钢制成焊接H型钢后进行不喷涮防火涂层耐火试验。经计算钢件载荷后按GB／J9978-1999标准进行耐火试验，结果表明耐火钢耐火极限高于普通钢100％以上，具有明显的耐火稳定性。另外。对耐火钢的耐火机理进行了说明。     

耐火可塑料在莱钢中型工程加热炉中的应用

耐火可塑料具有耐火度高，耐急冷急热性好，绝热性能好，抗渣性好，抗震性能及耐磨性能强等优点。文章总结了莱钢中型型钢工程中加热炉的炉墙、炉顶、烧嘴采用耐火可塑料的施工要点，遇到的质量问题及处理措施等。     

马钢开发耐火H型钢

马钢试制耐火Ｈ型钢获得成功 ,目前马钢已能生产用于建造高层复合式住宅楼的耐火Ｈ型钢。该产品在常温下的力学性能要求比Ｑ3 45钢高 ,同时要求在 60 0℃的高温下 ,钢材的屈服强度不低于 2 3 0ＭＰａ,从而使以耐火Ｈ型钢钢材为主体结构的建筑物的安全性大大提高。目前 ,马钢开发成功的耐火Ｈ型钢已陆续发往用户。马钢开发耐火H型钢     

马钢开发耐火H型钢

马钢试制耐火 H型钢获得成功。目前国内只有马钢能够生产用于建造高层复合式住宅楼的耐火 H型钢。该产品在常温下的力学性能要求比 Q345钢种产品高 ,同时要求在 6 0 0℃的高温下 ,钢材的屈服强度不低于 2 30MPa,从而使以耐火 H型钢钢材为主体结构的建筑物其安全性大大提高。目前 ,马钢开发成功的耐火 H型钢已陆续发往用户马钢开发耐火H型钢@古愈     

莱钢H型钢研发与生产

莱钢H型钢研发品种：1）H型钢的重型化;2）H型钢的轻型化;3）H型钢的异型化;4）特殊性能H型钢,包括耐火H型钢开发、耐候H型钢开发、600MPa以上高强度H型钢开发、铁道机车用钢开发、石油平台用钢。     

技术信息

国内·莱钢开发出耐火、耐候 H型钢FIRE AND ATMOSPHERIC CORROSIONRESISTING H BEAMSDEVELOPEDAT LATWU STEEL近日 ,耐火耐候热轧 H型钢在莱芜钢铁集团 H型钢生产线一次顺利试轧成功。耐火耐候热轧 H型钢 ,主要是在钢材材质上利用微合金化技术 ,使所轧制的 H型钢具有很好的耐火耐腐蚀性能。2 0 0 2年 5月 6日 ,莱钢中型型钢厂在试轧过程中 ,通过严格控制钢坯的加热温度、均热温度、终轧温度 ,采用计算机跟踪采集轧制压力、扭矩、电流等力能参数 ,认真做好轧件的控轧、控冷 ,严格按工艺标准进行取样等一系列技…     

铌微合金化长材产品的开发

介绍了铌微合金化技术在马鞍山钢铁股份有限公司长材产品开发中的应用情况,该公司近年来开发了铌微合金化的HRB400钢筋、HRB500钢筋、海洋石油平台用H型钢、铁道车辆用H型钢、美标MA345多级结构H型钢、耐火H型钢和MFT8非调钢盘条等长材产品,在铌微合金化长材品种钢开发方面取得了很大进展。     

Mo对耐火钢高温屈服强度的影响

设计了一系列Mo质量分数从0.1%到0.8%的Fe-Mo-C三元模型钢.采用两种不同热处理工艺制度得到不同的组织,研究了Mo元素对耐火钢高温强度的两种强化形式:固溶强化和贝氏体相变强化.Mo可以显著提高耐火钢的高温强度,它在耐火钢中的主要高温强化机理是固溶强化.Mo质量分数不高于0.5%时,其高温固溶强化效果明显,每添加0.1%的Mo,600℃的屈服强度增量为13.71 MPa;但当Mo质量分数大于0.5%后,高温强度增幅逐渐减小.此外,贝氏体相变强化对耐火钢的高温强度也有重要影响.当贝氏体体积分数达到20%时,耐火钢的高温强度显著增加.     

用超快速冷却技术生产低成本高强钢

东北大学与莱芜钢铁公司开展了将超快速冷却技术用于H型钢生产的研究,结果证明超快速冷却技术可以改善H型钢轧后氧化铁皮状况,减缓产品锈蚀,消除轧件边腰接合部外侧疱疹状缺陷。尤其重要的是,超快速冷却技术通过控制相变过程,改善轧后组织结构,能够以低成本普碳钢为基材,在不添加或少添加微合金元素条件下开发高性能建筑用耐火H型钢、耐候型H型钢及海洋用H型钢等,显示出巨大的经济和社会效益。     

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

正~~     

Zinc Production by Province in 2014

正~~     

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.