热镀锌内加热用高效金属加热管的研制

实现热镀锌内加热方式的关键是解决耐锌蚀材料问题。天津工大镀锌设备有限公司研制开发的耐锌蚀金属复层材料,经多年试验证明,该材料与熔锌不润湿、不互溶、不被熔锌所腐蚀,其耐熔锌腐蚀寿命可与无机陶瓷材料相比美,强度和韧性又远高于无机陶瓷材料,能经受锌液凝固时所产生的收缩力和生产过程中工件的机械碰撞,满足频繁启动锌锅的生产要求,完全适用于热镀锌行业中的恶劣工况条件。基于该材料在耐蚀、强度和导热性等方面的优良特性.成功地制造出效率高、寿命长、工作稳定的大功率加热器。用其直接加热锌液,理想地实现了工业热镀锌内加热方式,收到了显著地节锌、节电、改善生产环境的效果。     

热镀锌机组沉没辊轴套磨损机理分析

通过光学、电子金相等手段分析了热镀锌机组上曾使用过的低碳合金钢及耐热钢轴套的腐蚀与磨损状况，发现轴套材料表面受锌腐蚀而形成高硬度的Ａｌ－Ｆｅ－Ｚｎ块状相，推断轴套因受腐蚀和磨粒磨损的联合作用而失效。     

热镀锌机组沉没辊轴套磨损理分析

通过光学，电子金相等手段分析了热镀锌机组上曾使用的低碳合金钢及耐热钢轴套的腐蚀与磨损状况，发现轴套材料表面受锌腐蚀而形成高硬度的Ａｌ－Ｆｅ－Ｚｎ块状相，推断轴套因受腐蚀和磨粒磨损的联合作用而失效。     

沉没辊表面抗液态锌腐蚀材料的研究

着重介绍了液态锌液对金属的腐蚀机制,对耐锌蚀材料及表面改性方法研究进行比较分析,并对耐液态锌腐蚀材料的发展趋势进行展望.结果表明热喷涂WC/Co、Al2O3、ZrO2-Y2O3、MoB/CoCr等涂层材料能有效提高抗锌液腐蚀能力,其中超音速喷涂MoB/CoCr涂层的性能最为突出,抗锌液腐蚀能力达600多小时,是有望成为提高沉没辊使用寿命的涂层材料.     

Fe-30Ce合金在H_2/H_2S混合气体中的腐蚀

研究了含３０ｗｔ．％Ｃｅ的Ｆｅ－Ｃｅ合金在６００～８００℃、Ｈ２／Ｈ２Ｓ混合气中的腐蚀行为，其硫的分压为１．０１×１０－３Ｐａ。结果表明，Ｆｅ－３０Ｃｅ合金的腐蚀速度比纯Ｆｅ慢得多，但比纯Ｃｅ快得多，随温度升高其腐蚀速度加快。该合金硫化后形成复杂的腐蚀产物膜，最外层为纯Ｆｅ的硫化物层，其下为Ｃｅ的硫化物与Ｆｅ的硫化物的混合物层，内层为Ｃｅ的内硫化区，与之相邻的基体金属层中没有贫Ｃｅ现象发生，Ｃｅ不能从合金的腐蚀区中扩散出去，而是在腐蚀区中形成Ｃｅ的硫化物与Ｆｅ的硫化物的混合物。尽管与纯Ｆｅ相比，Ｆｅ－Ｃｅ合金的腐蚀速度下降了，但在合金的表面上仍形成了连续的ＦｅＳ层，可见，３０ｗｔ．％的Ｃｅ亦不足以阻止基体金属的腐蚀，以及复杂氧化膜结构的形成，可能与Ｃｅ在基体金属中有限的溶解度及合金中金属间化合物相的出现有关。     

Nd－Fe－B磁体的腐蚀对磁性能的影响

本文研究了在浸泡、湿热和大气腐蚀试验条件下，Ｎｄ－Ｆｅ－Ｂ磁体的腐蚀行为以及腐蚀对磁体磁性能的影响。实验结果表明，Ｎｄ－Ｆｅ－Ｂ合金在氯化钠水溶液中有很强的腐蚀活性。湿热试验和大气腐蚀后的腐蚀产物层有一定的保护作用。Ｎｄ－Ｆｅ－Ｂ磁体腐蚀后剩余磁感应强度Ｂｒ和最大磁能积（ＢＨ）ｍａｘ均降低，矫顽力的变化则与腐蚀介质有关。同时，讨论了Ｎｄ－Ｆｅ－Ｂ磁体腐蚀影响磁性能的作用机理。     

由软锰矿,闪锌矿,铁屑直接制取锰锌铁氧体软磁材料新工艺研究

本文结合磁性材料工艺和锰矿技术特点，创造性地提出由软锰矿、闪锌矿制备锰锌铁氧体材料，克服了锰矿、闪锌矿处理过程的Ｍｎ－Ｚｎ、Ｍｎ－Ｆｅ、Ｚｎ－Ｆｅ分离难题，大大降低了磁性材料生产成本，由于磁性材料产品附加值高，从而为我国丰富的贫锰矿利用找到了一条有效的途径     

锅炉水冷壁管向火面外壁腐蚀原因分析

本文通过对锅炉水冷壁管向火面外壁腐蚀产物的Ｘ射线衍射和扫描电（ＳＥＴ）的分析，知道水冷壁管向火面外壁腐蚀产物为双层结构。其外层灰白色物相为ＦｅＳ，内层灰物相为Ｆｅ１－ｘＳ和Ｆｅ３Ｏ４，综合试验分析结果认为：由于水冷壁管表面有碱式硫酸盐化全物的存在，当环境为缺氧气氛时，能产生游离态的活性硫，硫与铁反应生成ＦｅＳ、ＦｅＳ与Ｆｅ形成共晶物，这种共晶物一氧气又反应生成ＦｅＯ和ＦｅＳ，这样一个交替反应过程的     

机械合金化制取Ni－Fe－Mo粉

机械合金化可使在室温下部分互溶体系Ｎｉ－Ｆｅ－Ｍｏ形成ｆｃｃ固溶态粉末，Ｎｉ、Ｆｅ、Ｍｏ三种元素在粉末颗粒表面及内部均匀分布存在，固溶态粉末的液相生成温度的为１７１０Ｋ。     

机械合金化制取Ni—Fe—Mo粉

机械合金化可使在室温下部分互溶体系Ｎｉ－Ｆｅ－Ｍｏ形成ｆｃｃ固溶态粉末，Ｎｉ、Ｆｅ、Ｍｏ三种元素在粉末颗粒表面及内部均匀分布存在，固溶态粉末的液相生成温度约为１７１０Ｋ。     

Chinalco Signed Framework Agreement for Strategic Cooperation with Harbin Municipal Government

正Last month,Chinalco signed framework agreement for strategic cooperation with Harbin Municipal Government in Harbin Xiong Weiping,Chairman of Chinalco,said that based on the strategic deployment to build world top-class mining company with the highest growth potential,Chinalco was now concentrating all efforts on making strategic transition and structural adjustment,strategic cooperation with the local governments where     

Jiangxi Promotes Jiangxi Copper Corporation To Become The World's Most Competitive Mining Company

<正>According to the latest info from Jiangxi Province State-owned Assets Supervision and Administration Commission,Jiangxi Copper Corporation was approved to become the first pilot enterprise for deepening reform.Contents of the pilot work is"Three Self"(self expansion,self decision-making,self     

Journal of Rare Earths Contents List of Vol.32(2014)

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Contributions to Baosteel Technical Research wanted

正Baosteel Technical Research,a quarterly journal,which is issued domestically and abroad,is run and sponsored by Baosteel Group Corporation.Baosteel Technical Research mainly reports the achievements in technological innovation,academic research,new product development and industrial equipment improvement by Baosteel.It will continue to follow up on hot topics and serve the company’s technological development and progress.Its readers include experts in     

Ministry of Industry and Information Technology: No Short Term Solution For Our Country’s Excess Nonferrous Metal Smelting Capacity

【正】According to the Ministry of Industry and Information Technology,the Ministry has released the 2013 Operation Report on China’s Industrial Communication Indu...     

Chinalco Signed Framework Agreement for Strategic Cooperation with Gansu Province

正Recently,Chinalco and Gansu Provincial People’s Government signed"Framework Agreement for Strategic Cooperation on Reform,Restructuring and Transition Development of Chinalco’s Electrolytic Aluminum Enterprises in Gansu",signifying that the strategic cooperation between Chinalco and Gansu Province had made new substantive progress.     

Unavoidable Economic Cycle:30% Of Nonferrous Metal Companies Were Involved In Restructuring

正Owing to continual downturn in real estate and bulk commodity markets,a number of traditional industries in China suffered unfavorable impact in performance.With the progressive disclosure of third quarter report,the no-pleasant-surprise performance of     

Baotou Rare Earth Became the World's Biggest High Performance Magnetic Material Base

正The High Performance Magnetic Material Phase II Project,an industry upgrading project implemented by Inner Mongolia Baotou IronSteel Rare Earth(Group)Hi-tech Co.,Ltd,recently basically finished equipment commissioning,signifying that the enterprise had developed the production capacity of15000 t/a Nd-Fe-B strip casting alloy and 5000t/a Nd-Fe-B magnet,thus becoming the world’s     

Introducing Two Central Enterprises to Integrate Rare Earth Industry,Shandong Rare Earth Group Breaks Surface

正With the signing of"Letter of intention for Propelling Integration of Shandong Rare Earth Enterprises"between Shandong Province Commission Of Economy and Informatization,China IronSteel Research Institute Group("China Steel Institute"),and China Rare MetalsRare Earth Co.,Ltd("China Rare Earth"),the"Shandong Rare Earth Group"jointly set up by the 3 units thus broke surface.On August 9,reporters of the China Economic Herald learned from Shandong Province     

Aluminium Production by Province or City in 2014

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