连铸小方坯生产大规格82B盘条的实践

预应力钢绞线用优质高碳盘条82B在拉拔过程中常出现脆断现象。通过对碳偏析、缩孔、表面横裂等质量影响因素的分析，提出并实施了相应的工艺改进措施；通过优化炼钢、连铸、控轧控冷以及拉拔工艺等，提高了盘条质量．降低了用户在使用过程中的断丝率。     

优化连铸工艺 提高硬线盘条质量

分析了82B、77B系列盘条在拉拔过程中常出现的脆断现象，指出碳偏析、缩孔、表面横裂缺陷是导致盘条在拉拔过程中发生断裂的主要因素。通过优化连铸工艺，提高了盘条的质量，降低了用户在使用过程中的断丝率。     

65MnTi盘条拉拔过程中产生断裂的原因分析及控冷工艺参数的改进

通过对拉拔过程中发生断裂盘条的金相组织，断口形貌进行分析检验，找出６５ＭｎＴ盘条在拉拔过程中产生断裂的原因。给出制定控冷工艺的基本原则，并根据线材厂生产实际进行不同控冷工艺参数的对比试验，改进原控冷工艺，确定了满足６５ＭｎＴｉ盘条质量要求的新控冷工艺参数。     

ER70S-6合金焊丝钢盘条的控轧控冷工艺分析

总结昆钢试制∮6．5mmH08Mn2Si合金焊丝钢的情况，分析ER70S-6焊丝用盘条的质量要求以及在拉拔过程中产生脆断的原因；提出昆钢开发∮5．5mmER70S-6牌号合金焊丝钢盘条的控轧控冷工艺，说明采用适当的控轧控冷工艺是有效控制焊丝钢盘条质量的关键措施之一。     

湘钢SWRH82B/SAE1080质量分析与工艺控制

预应力钢丝、钢绞线用优质高碳盘条SWRH82B/SAE1080在拉拔过程中常出现脆性断裂现象.通过对中心缩孔和碳偏析、表面横裂纹、粗大珠光体或网状碳化物不良组织等引起断丝原因的分析,提出通过合理控制浇注温度、拉速、二冷强度、控轧控冷强度及拉拔工艺参数等措施,改进盘条实物质量,降低断丝率.     

82B盘条生产工艺优化

82B盘条拉拔脆断及低温脆断是高碳钢盘条的经常发生的问题,对盘条及下游客户拉丝生产造成了严重影响。本文通过对酒钢82B盘条控冷工艺进行研究,结果表明:优化控冷工艺及设备防护可改善盘条内部金相组织及表面质量,减少脆断现象。     

提高硬线钢质量措施

对高碳钢盘条在拉拔过程中常出现的脆断现象进行分析,指出钢水纯净度不够、碳偏析、轧制过程冷却强度不够及风冷冷却不均是导致盘条在拉拔过程中发生断裂的主要原因。通过优化炼钢、轧钢工艺,提高盘条钢质量,降低并最终杜绝用户在使用过程中的断丝。     

钢绞线用盘条SWRH82B拉拔断裂影响因素分析

利用金相显微镜对某厂生产的预应力钢绞线盘条拉拔断裂样进行分析,根据拉拔断样形貌,分析出预应力钢绞线盘条拉拔断裂影响因素包括成分偏析、盘条表面缺陷、盘条组织、拉拔工艺等,为提出合理的改善措施,提高高碳钢盘条质量提供了便利条件。     

高碳硬线拉拔脆断原因分析

高碳硬线盘条作为金属制品的原料，在深加工过程中容易出现脆断现象，其原因一是盘条本身存在缺陷，二是拉拔工艺存在缺陷，本文对脆断原因进行了分析，并提出了改进措施。     

提高SWRH82 B盘条质量的工艺实践

文章采用金相组织检验以及电镜扫描等方法,对拉拔、绞线过程中产生断裂的SWRH82B盘条进行检验,得出引起断裂的原因主要是心部马氏体和夹杂物的存在。另外,生产加工工艺的不合理也是盘条质量较差的一个重要原因。通过改善生产加工工艺,盘条质量明显改善,拉拔断丝现象减少。     

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.