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2041.差相磁场对水平连铸3004铝合金铸锭内部组织的影响
[金属制品业] [2014-02-15]
采用差相磁场水平连铸技术生产了直径为100mm的3004铝合金铸锭,采用宏微观组织观察、金相分析等方法研究差相磁场对3004铝合金水平连铸铸锭内部组织的影响.试验结果表明:差相磁场可以有效减小皮下偏析层的厚度,改善铸锭的铸态组织,施加差相磁场后3004铝合金铸态组织由粗大的柱状晶转变为细小均匀的等轴晶.
关键词：差相磁场；铝合金；水平连铸；铸态组织
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2042.大型船用挂舵臂铸件的生产
[金属制品业] [2014-02-15]
对大型船用挂舵臂铸件的工艺设计、现场生产和生产过程的管理进行了详细探讨,并严格按照确定的工艺设计方案完成了该件的生产,最终该产品通过了7个国家船级社的认证.总结了成功的生产经验,为以后生产大件的工厂提供参考和帮助.
关键词：船用件；大型铸钢件；生产管理
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2043.出口欧美ADI链轮的生产技术
[金属制品业] [2014-02-15]
为稳定生产抗拉强度大于1400 MPa,屈服强度大于1100 MPa的ADI铸件,首先应选择优质炉料、球化剂和孕育剂,并采取多次孕育等措施,从而可得到优质球铁毛坯.然后采用闪点为320℃的油作为淬火介质,780℃预处理和920℃保温2 h+240℃淬火3h的等温淬火工艺.最终产品的金相组织和力学性能均达到了质量要求.
关键词：ADI；球化孕育处理；淬火油；等温淬火
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2044.轻型数控成形机主体结构有限元分析与优化
[金属制品业] [2014-02-15]
轻型数控成形机是基于无模化制造技术而开发的一种可直接对砂型进行加工以获得所需铸型的数字化成形设备,其主体结构是整个成形机的基础和框架,也是承载压力的最重要组件.因此,轻型数控成形机主体结构的设计与开发不仅直接影响成形机的性能与使用寿命,而且是反映成形机整体设计水平的重要因素.本研究通过有限元模拟对成形机主体结构的两种设计方案分别进行静力学分析以及模态分析,优化出更为合理的结构方案,并确保成形机整体安全、可靠.其研究结果为轻型数控成形机的结构设计提供了有效的理论依据.
关键词：轻型数控成形机；铸型；主体结构；静力学分析；模态分析
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2045.低温铸态无Ni球墨铸铁的试验研究
[金属制品业] [2014-02-15]
研究了在废钢增碳工艺条件下,化学成分、球化及孕育对低温球墨铸铁铸态力学性能、低温性能及金相组织的影响.结果表明:废钢增碳条件下,成分为3.4％～4.0％C,1.7％～2.2％ Si时,-20℃低温冲击吸收功≥12 J,-40℃时≥10J;采用包底复合球化、包底孕育、出铁随流孕育、浇注随流孕育的复合孕育工艺使材质金相组织球化达到2级,石墨大小6级90％、5级10％,铁素体＞90％.
关键词：铸态；低温性能；废钢增碳；随流孕育
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2046.热轧板带高镍铬无限冷硬轧辊的生产要点
[金属制品业] [2014-02-15]
随着热轧板卷质量的提高,对轧辊尤其是精轧机组工作辊的要求变得更高.通过成分调节、工艺优化及生产试用,来提高离心铸造高镍铬无限冷硬轧辊的综合性能.结果表明,轧辊的过钢量、耐磨性等指标达到了预期效果.
关键词：轧辊；热轧带钢机；离心铸造；耐磨性
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2047.Sn对Mg-Al合金性能改善的电子理论分析
[金属制品业] [2014-02-15]
在Mg-Al合金中加入Sn合金,能有效地提高合金的强度和蠕变性能.试验研究表明,Sn对Mg-Al合金蠕变性能的改善主要是通过Mg2Sn第二相强化而实现的.本研究中运用固体与分子经验电子理论(EET)研究了α-Mg、Mg2Sn的价电子结构,通过计算共价电子对数和键能,探讨Sn对Mg-Al合金强度和抗蠕变性能提高的机理.
关键词：Mg-Al合金；Mg2Sn；价电子结构；键能
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2048.中国钛焊管行业发展现状分析
[金属制品业] [2013-10-10]
钛焊管作为一种相对独特的钛管产品形式，是把冷轧钛带卷进行轧制成管形后采用钨极惰性气体保护焊将缝隙焊合而成。由于其优异的耐海水腐蚀的性能，自开发出来后就成为了各类冷凝器和热交换器替代不锈钢和铜管作为换热管的首选材料，也因此被广泛应用于制造滨海电站、核电站、海水淡化、石油化工等需海水作为冷却介质的冷凝器和热交换器。
关键词：钛焊管；发展现状
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2049.全球封闭盖和喷口盖市场报告（2012-2016年）
[金属制品业] [2013-10-01]
Caps and closures are used for closing or sealing packaged products such as food, beverages, personal care, household care, and automotive products. They are generally made of materials such as metal, plastic, rubber, or combinations of them. The market for caps and closures includes threaded caps, hinged caps, roll-on closures, twist-off closures, stoppers, corks, dispensing closures, lug caps, and canning lids. Caps and closures are used for various purposes such as protecting the contents from spoilage, dust, and evaporation, keeping its contents fresh, and convenience of handling. These days, caps and closures are also used for product differentiation as well as brand building. Hence, caps and closures form an essential element in the overall packaging of products, increasing both aesthetics and functionality of the products.
关键词：封闭盖；喷口盖；瓶盖；密封包装；材料
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2050.全球金属铸造市场报告（2012-2016年）
[金属制品业] [2013-09-30]
Metal casting is a manufacturing process in which molten or liquid metal is poured into a mold made of sand, metal or ceramic, which contains a hollow cavity of the desired shape, to form geometrically complex parts. All major metals can be made into castings and the most common ones are iron, aluminum, magnesium, zinc, steel and copper-based alloys. Metal castings find application in cars, trucks, planes, trains, mining and construction equipment, oil wells, pipes, toys, space shuttles, wind turbines, nuclear plants, and more.The Global Metal Casting market is expected to grow steadily during the period 2012-2016. The market was dominated by the APAC region in 2012, followed by the Americas and the EMEA region. The Global Metal Casting market is expected to grow at a CAGR of 7.89 percent during the forecast period.
关键词：金属铸件；制造过程；铁；铝；镁；锌；钢
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