铝对铁水中氧含量的影响

研究了铝对铁水中氧含量的影响。结果表明，在铝的脱氧作用和吸氧作用之间有一个最低的氧含量点，且存在与此相应的铝含量值。当铁水中铝含量高于此值时，铝促进铁水吸氧，氧含量随铝含量的增加而增加。当铁水中铝含量低于此值时，铝使铁水脱氧，铁水中的氧含量随铝含量的增加而降低。     

我国铝及铝合金的应用及趋势浅析

国内铝工业已经发展到了相当规模，与此相适应，铝在各行业中的应用范围也迅速扩大。本文试图对国内铝应用现状作一概述，并对今后几年铝的应用趋势作一分析，指出交通，包装，建筑三大行业用铝将出现高速增长，各行业铝消费比例将趋势作一分析，指出交通，包装，建筑三大行业用铝将出现高速增长，各行业铝消费比例将趋于合理，并出现向国际铝消费比例靠拢的倾向。     

再生铝工业的环境问题

再生铝工业的资源主要来源于废铝，即应用领域的消费废铝和生产领域的加工废铝。随着经济全球化，废铝已进入国际市场，成为～种可流动的资源。最近几年中国大量进口废铝，已引起国际市场的高度关注。中国是废旧铝回收与再生铝生产利用大国，同时也是一个发展中国家，虽然各级政府对环境保护极为重视，但在废旧铝再生过程中仍产生了较为严重的环境污染。     

铝灰管理的艺术

人们一般认为铝灰的产生应当保持最少的数量，同时又十分看重铝灰中铝含量最大化的重要性。一些人错误地认为，低的铝含量是一件好事情。其实铝一直留在炉子中，由于冷却和铝热反应不充分，铝实际上已经损失了。     

国际铝协“铝回收再生”中文网站上线

据尚轻时代消息，前不久，国际铝协宣布开通“未来之铝一一铝回收再生”中文网站（http：／／recycling.world—aluminium.org／cn）。国际铝协秘书长Ron Knapp先生表示，他期待中国铝企业、铝的用户、研发机构、政府部门、媒体及消费者能通过网站，了解铝回收与再生的优势及案例，了解铝材料为资源、环境和社会可持续发展的贡献，展现铝工业为此所做出的努力和成就。     

不要热，要科学发展——对发展我国再生铝行业的两点意见

近年，我国开始重视循环经济研究，加之电解铝过热现象已受到国家严格宏观调控。因此，在我国铝工业发展中，转而对再生铝行业的发展越发重视。如何科学地发展我国再生铝工业?现在有一种主导性的观点，认为我国铝工业发展中，电解铝、氧化铝行业已“过热”或需要“防止过热”，但是我国再生铝行业“还很冷”。因此，在对原铝工业发展适度控制同时，提出我国再生铝行业要快快热起来。对再生铝行业发展目标，提出了以下两个重要指标：在我国铝金属生产或消费中，再生铝产量要达到铝金属总产量的50-60％：再生铝消费量占铝金属总消费量的35-40％。上述指导我国再生铝行业发展的观点具有全局性战     

铝市场分析与预测

介绍世界铝行业现状，原铝产量与消费量，我国铝行业现状、产量、消费量及进口量变化，世界铝市场消费预测，国内铝市场消费预测，我国电解铝企业具备参与国际竞争的能力，铝价分析与预测。     

铝灰挤压冷却回收技术的新方向

铝灰是不可避免的铝工业副产品，通常铝灰重量能占到电解铝厂的总产量的1％～5％之间，装备有各种压制机头／盘选择方案的ALTEKTARDfS第二代铝灰压制机能有效处理所有颗粒的铝灰，其原理引导着铝熔炼过程中回收铝的新方向，这种装置对于从灰渣中回收铝和降低环境污染有着明显的节能效果。     

全球废铝回收的现状和未来

根据CRU和海德鲁铝业集团预测，全球废铝回收再生的年增长率为5．8％，而原生铝生产的年增长率为4．2％，到2015年全球废铝回收再生产量将达到2600万吨，而全球铝总产量将达到7300万吨，其中废铝回收再生产量占到铝总产量的36％。     

系统风险集中释放铝价跟跌寻基本面支撑

进入9月，铝市基本面变动不大，国内交易所铝库存的持续下降、下方成本存在的支撑，使得铝价较为坚挺，但外围系统性风险的不确定，以及经济指标的疲弱忧虑，正使铝市承压。初步预计，内外盘铝价将可能在年内前低位寻获支撑，经一段时间企稳后，10月中下旬铝价的交易重心仍可能振荡向上，冬季铝市也仍可能再出现一波“脉；中式”的涨跌行情。     

NaCl盐膜对铝青铜高温氧化行为的影响

采用金相检验、X射线衍射、扫描电影能谱及热重分析法研究了涂有NaCl盐膜的铝青铜在700～900℃的氧化行为。结果表明,在NaCl盐膜的作用下,铝青铜中的铝较铜先腐蚀,所形成的氧化膜结构疏松,易开裂和剥落,从而加速铝的氧化过程。此外,还讨论了NaCl加速铝青铜氧化的机制。     

铝青铜合金的研究与发展

从铝青铜的热处理工艺和微合金化两个方面总结了目前铝青铜合金在国内外的研究现状与发展趋势.综合目前的研究结果,详细介绍了合金元素及热处理对铝青铜合金的强度、硬度、伸长率及耐磨、耐蚀性能等综合性能的影响,为进一步研究铝青铜合金提供了参考.     

Tensile properties of some copper- and zinc-based alloys: Effects of strain rate and test temperature

This study analyzes the effects of test temperature and strain rate on the tensile properties of some copper-and zinc-based alloys. The copper-based alloys comprised a leaded-tin and an aluminum bronze, whereas the zinc-based alloys were added with various quantities of aluminum. The aluminum bronze attained maximum room-temperature tensile strength, whereas that of the leaded-tin bronze was the least. Among the zinc-based alloys, the one comprising 27.5 mass% aluminum exhibited superior tensile strength, followed by those alloyed with 11.5, 37.5, and 47.5 mass% aluminum in a descending order. Increasing strain rate tended to improve the tensile strength of the alloys. Tensile strength was reduced with an increase in test temperature irrespective of the alloy composition. The aluminum bronze possessed maximum strength regardless of temperature. The leaded-tin bronze attained least strength property at low temperatures, whereas higher test temperatures led to superior strength than the zinc-based alloys. The temperature sensitivity of the strength of the zinc-based alloys decreased with their aluminum content. Tensile elongation of the alloys tended to increase with an increase in strain rate and test temperature. Leaded-tin bronze was least affected in either case. The alloy also attained least elongation irrespective of test conditions. The aluminum bronze showed maximum elongation, at least at high strain rates. In the case of the zinc-based alloys, intermediate range of aluminum concentration led to better elongation. The elongation property of the alloys was affected by temperature in different manners. In a few cases, the elongation initially increased followed by a reduction beyond a specific test temperature, whereas, in other cases, a continuous increase with temperature was noted. The observations made have been discussed in terms of the nature of different microconstituents of the alloys whose effectiveness changes with test conditions. The response of the samples has been further substantiated with their fractographic features and subsurface characteristics.     

Fabricating Aluminum Bronze Rotating Band for Large-Caliber Projectiles by High Velocity Arc Spraying

The necessity of finding new rotating band materials and developing corresponding joining technologies for large-caliber projectiles has been revealed by the recent increase in the ballistic performance of high loads. In this paper, aluminum bronze coatings were fabricated by the high velocity arc spraying (HVAS) technique. Microstructure and microhardness of the prepared coatings were investigated. Ring-on-disk dry sliding wear tests were conducted in an ambient condition to examine the tribological behavior of the coatings. Quasi-static engraving processes of rotating bands made of as-sprayed aluminum bronze coating and bulk copper were studied using rate-controlled push test methodology on an MTS 810 Material Testing System. The results show that the as-sprayed aluminum bronze coatings have a dense microstructure with porosity of about 1.6%. Meanwhile, the as-sprayed coating presents a higher microhardness than pure copper. The friction coefficient of coatings is about 0.2-0.3 in the steady state. Tribological mechanisms of the as-sprayed coatings were discussed. The engraving test results show that the aluminum bronze rotating band presents high bonding strength and good plasticity. The HVAS aluminum bronze coating should be a possible substitute for the state-of-the-art copper rotating band.     

Tool wear mechanism in turning of novel wear-resisting aluminum bronze

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Two distinct fracture modes of copper alloys in fluoride environments

The susceptibility of aluminum brass and aluminum bronze to stress corrosion cracking (SCC) was evaluated in fluoride environments by means of the slow strain rate technique. The effects of fluoride concentration and applied electrochemical potential on the SCC susceptibility were investigated. The SCC mechanism of aluminum brass was found to be dependent upon the de-alloying phenomenon while that of aluminum bronze on the film-rupture mechanism occurring within a certain range of applied electrochemical potentials. For aluminum brass, both the stress ratio and the time-to-fracture ratio were closely related to the logarithmic concentration of F⁻ ions. The fracture modes were ductile dimpled tearing fracture for the aluminum brass at the corrosion potential while intergranular for the aluminum bronze at various anodic potentials. The micro-galvanic effects of the constituent elements were used to estimate the anodic equilibrium potentials of the two alloys.     

Research of Tribological Behaviors of a New Aluminum Bronze

ALUMINUM BRONZE is an important engineeringmetal.It has been widely used to manufacture parts thatrequire high wear resistance and high stress based onsome important properties,such as high strength,certain ductility,excellent wear resistance andcorrosion resistance,etc.Typical applications includemarine propeller,valves,mould,gear blanks and so on.In recent years,tribological behaviors of aluminumbronze have been intensively investigated.For example,some researches were focused on the e…     

铸造铝青铜显微组织的计算机辅助分析

针对传统金相定量分析中准确度低、速度慢的缺点,利用计算机图像处理技术对自主开发的一种铸造多元高铝青铜合金(代号HSWAB)的显微组织进行了分析与测量.主要包括系统构成、图像处理与分析的主要步骤、显微特征参数的测量和误差分析,并讨论了该研究领域的发展趋势.结果表明,利用计算机图像分析技术分析铝青铜显微组织方便、实用.该项技术的应用将为铝青铜材料的研究和应用提供分析的依据.     

新型多孔金属结合剂胎体的研制

本文采用正交设计和方差分析的方法,对新型铝青铜结合剂配方和烧结温度进行优化.试验比较新、旧造孔剂在新型铝青铜结合剂和传统的锡青铜结合剂中的造孔效果以及对胎体力学性能的影响.结果表明:随着烧结温度、铝含量以及Fe含量的提高,铝青铜胎体的抗弯强度、硬度和耐磨性均提高.当铝青铜胎体中的Al含量为8％、Fe含量为3％,TiH2...     

冷喷涂辅助原位合成高铝青铜涂层的组织与性能

提出了一种冷喷涂辅助原位合成高铝青铜合金涂层的方法,使用该方法在45~#钢基体上制备了高铝青铜涂层。通过SEM、EDS、XRD分析涂层微观形貌和物相组织;采用销-盘式摩擦磨损试验机测试涂层的摩擦磨损性能;用CHI660D电化学测试系统测合金涂层耐腐蚀性能。结果表明:冷喷涂辅助原位合成高铝青铜合金涂层的组织是以β相、α相、γ_2相和k相为主的典型高铝青铜合金组织。原位合成的高铝青铜合金涂层结构致密、孔隙率低,具有良好的机械性能和耐磨、耐腐蚀性能,与铸态块体高铝青铜合金的性能接近。涂层的硬度(HV)为3570 MPa,与氧化铝的干摩擦系数为0.320。在3.5%Na Cl和5.0%H_2SO_4(质量分数)腐蚀介质中的稳定电压分别为-366和-387 m V。