废旧机电产品资源化途径选择分析

通过研究废旧机电产品的特征,结合国内外废旧机电产品资源化现状,分析了废旧机电产品资源化的再利用、再制造、再循环三种主要途径及其特点.     

废旧机电产品资源化途径选择分析

通过研究废旧机电产品的特征，结合国内外废旧机电产品资源化现状，分析了废旧机电产品资源化的再利用、再制造、再循环三种主要途径及其特点。     

再制造工程的发展及推进产业化中的前沿问题

再制造是把达到使用寿命的产品通过修复和技术改造使其达到甚至超过原型产品性能的加工过程,再制造是废旧机电产品资源化的首选途径.我国已进入到以推动再制造产业发展为中心内容的新阶段,建立生产者延伸责任制,充分发挥产品制造企业的主体作用;制定再制造企业认证法规,完善再制造产品质量体系;推广以表面工程为核心的先进技术提高旧件利用率是当前急待研究的主要问题.     

发展再制造业开发"城市矿山"

目前,我国已进入电器废弃的高峰期,每年要报废200万辆汽车,报废2 800万台旧家电.有人把这些废旧机电产品称为"都市矿山",相对于自然资源这些废弃物就是第二资源.把它们资源化的基本途径有三条,即再利用、再制造和再循环.     

发展再制造业 开发“城市矿山”

目前，我国已进入电器废弃的高峰期，每年要报废200万辆汽车，报废2800万台旧家电。有人把这些废旧机电产品称为“都市矿山”，相对于自然资源这些废弃物就是第二资源。把它们资源化的基本途径有三条，即再利用、再制造和再循环。     

我国工程机械实施再制造的可行性分析

工程机械行业的再制造将会以废旧的工程机械产品为对象,通过现代技术与工艺加工,在规范的市场运作下,最大限度地开发利用其中蕴涵的材料、能源及经济附加值等财富,使其成为有较高品位可以使用的资源,以达到节能、节材、保护环境等目的,从而支持社会的可持续发展.本文依据国内外再制造发展情况,以及现阶段工程机械的维修方式,具体分析在我国工程机械大环境下实施再制造的可行性,为工程机械行业全面实施绿色再制造工程提供有力依据.     

失效机电产品零件快速修复

机电产品的轻量化、再利用、再循环和废旧产品的再制造,对国民经济的持续发展具有重大意义。介绍了采用表面工程中的电刷镀技术改造传统材料表面处理工艺和失效零件的快速修复工艺及实例。     

我国工程机械实施再制造的可行性分析

工程机械行业的再制造将会以废旧的工程机械产品为对象，通过现代技术与工艺加工，在规范的市场运作下，最大限度地开发利用其中蕴涵的材料、能源及经济附加值等财富，使其成为有较高品位可以使用的资源，以达到节能、节材、保护环境等目的，从而支持社会的可持续发展。本文依据国内外再制造发展情况，以及现阶段工程机械的维修方式，具体分析在我国工程机械大环境下实施再制造的可行性，为工程机械行业全面实施绿色再制造工程提供有力依据。     

汽车发动机再制造效益分析及对循环经济贡献研究

再制造工程是以机电产品全寿命周期设计和管理为指导，以废旧机电产品实现性能跨越式提升为目标，以优质、高效、节能、节材和环保为准则，以先进技术和产业化生产为手段，对废旧机电产品进行修复和改造的一系列技术措施或工程活动的总称，是废旧机电产品资源化的高级形式和首选途径，是贯彻科学发展观，走新型工业化道路，构建循环经济发展模式和实现可持续发展战略的重要途径之一。在对3000台斯太尔汽车发动机再制造过程的剖析和对我国报废汽车的数量、质量调研的基础上测算：如果再制造工程能在废旧汽车发动机上全面实施，2020年前的15年内，年均可回收附加值1424～2236亿元，年均可节电60～94亿度，年均可减少CO2排放667～969万吨，说明发展再制造工程对丰富我国循环经济的内涵，促进国民经济快速、持续发展具有重大而深远的意义。     

以旧换再商机无限

0概述 什么是再制造?再制造是指将旧汽车零部件、工程机械、机床等进行专业化修复的批量化生产过程,使再制造产品达到与原有新品相同的质量和性能.再制造产品是指境内旧品经过再制造过程并达到再制造要求、重新上市销售的产品. 具体来说,再制造是把废旧产品恢复到像原产品一样的技术性能和产品质量的生产工艺流程,主要以机电产品(装备)等废旧工业制成品为原料,在基本不改变产品结构和材质的情况下,运用高科技的清洗工艺、修复技术或利用新材料、新技术,进行专业化、批量化修复和改造,使得该产品在主要技术性能和安全质量等方面能够达到与同类原产品相同的标准要求.     

Three-Dimensional Growth of Coherent Ferrite in Austenite: A Molecular Dynamics Study

Coherent second phase often exhibits anisotropic morphology with specifi c orientations with respect to both the second and the matrix phases. As a key feature of microstructure, the morphology of the coherent particles is essential for understanding the second-phase strengthening eff ect in various industrial alloys. This letter reports anisotropic growth of coherent ferrite from austenite matrix in pure iron based on molecular dynamics simulation. We found that the ferrite grain tends to grow into an elongated plate-like shape, independent of its initial confi guration. The fi nal shape of the ferrite is closely related to the misfi t between the two phases, with the longest direction and the broad facet of the plate being, respectively, consistent with the best matching direction and the best matching plane calculated via the Burgers vector content(BVC) method. The strain energy calculation in the framework of Eshelby's inclusion theory verifi es that the simulated orientation of the coherent ferrite is energetically favorable. It is anticipated that the BVC method will be applicable in analysis of anisotropic growth and morphology of coherent second phase in other phase transformation systems.     

Effect of Short-Time Aging on the Pitting Corrosion Behavior of a Novel Lean Duplex Stainless Steel 2002

The effect of short-time aging in the temperature range between 400 and 1000 °C on the pitting corrosion behavior and mechanical property of a novel lean duplex stainless steel(LDSS) 2002 was investigated through the potentiostatic critical pitting temperature(CPT) tests and the Charpy impact tests. Both the pitting corrosion resistance and the toughness of aged specimens degraded due to the precipitation of detrimental secondary phases and the most significant reduction of CPT and impact energy emerged at 650 °C concurrently. The CPT of LDSS 2002 specimen aged at 650 °C decreased by 28 °C, and the impact energy dropped from 69 to 29 J/cm~2 compared with the solution-annealed sample. Transmission electron microscopy characterization showed that the main precipitates in LDSS 2002 were Cr_2N and M_(23)C_6 along the ferrite–austenite grain boundaries.     

INTRODUCTION TO PATENTS

The invention provides a method of making a mold which can reduce SOx generation rate while preventing decrease in hardening rate in the case of using sulfuric acid for a hardener composition. The method has a mixture step in which fire-resistant particles, a hardener composition and a binder composition are mixed to obtain a composition for a mold. The hardener composition contains sulfuric acid. In the mixture step, sodium carbonate is added. A molar ratio of the sulfuric acid to the sodium carbonate is 0.5 or more and 4.0 or less.     

China Foundry Week 2014

China Foundry Week, hosted by the Foundry Institution of Chinese Mechanical Engineering Society （FICMES） each year, is a large academic event in China. It is one of the ten high-impact activities sponsored by the Chinese Mechanical Engineering Society.     

17th Conference of Hydrodynamic and Electromechanical Control Engineering Call for papers

正1.Contents In order to promote the academic exchanges and technical communication of the research in the field of fluid power transmission and control,fluid control engineering specialized committee of the Chinese Society of Theoretical and Applied Mechanics will hold the 17th Conference of Hydrodynamic and Electromechanical Control Engineering on July 27-29,2014 in Tibet,Lhasa city.     

Information for Contributors

正The Transactions of Nonferrous Metals Society of China,founded in 1991 and sponsored by The Nonferrous Metals Society of China,is published monthly now and mainly contains reports of original research which reflect the new progresses in the field of nonferrous metals science and technology,including mineral processing,extraction metallurgy,metallic materials and heat treatments,metal working,physical metallurgy,powder metallurgy,with the emphasis     

Preface

<正>We are pleased to present this Special Issue of Transactions of Nonferrous Metals Society of China containing selected papers from the First Asian Conference on Aluminum Alloys(ACAA-2013),held in Beijing,China,13–17 October 2013.This conference has been initiated,with approval of     

Information for Contributors

The Transactions of Nonferrous Metals Society of China, founded in 1991 and sponsored by The Nonferrous Metals Society of China, is published monthly now and mainly contains reports of original research which reflect the new progresses in the field of nonferrous metals science and technology, including mineral processing, extraction metallurgy, metallic materials and heat treatments, metal working, physical metallurgy, powder metallurgy, with the emphasis on fundamental science. It is the unique preeminent publication in English for scientists, engineers, under/post-graduates on the field of nonferrous metals industry. This journal is covered by many famous abstract/index systems and databases such as SCI Expanded, Ei Compendex Plus, 1NSPEC, CA, METADEX, AJ and JICST.     

FORMULAS OF TENSION OF CONTINUOUS ROLLING PROCESS

The development of computer controlled continuous rolling process calls for a mathematical expression that can express the inequality condition of "constant flow". Tension is the link of the continuous rolling process. From the condition of dynamic equilibrium, a differential equation of tension is given out. On the basis of the physical rules established from the industrial practice and experimental studies, the law of volume constancy, the linear relation of forward slip and tension, the state equation of continuous rolling, the formula of dynamic tension, and the formula of static tension have been obtained. These formulae reflect the functional relations between tensions, thickness, roll velocity, and time in the continuous rolling process. It is implied that the continuous rolling process is a gradually steady, controllable, and measurable dynamic system. An assumption of predicting the thickness of a steel plate using these tension formulae is also put forward.     

RHEOLOGY FEATURE OF SIMPLE METAL MELT

The rheology feature of Sb, Bi melt and alloys was studied using coaxial cylinder high-temperature viscometer. The results showed that the curve of torsion-rotational speed for Sb melt presents a linear relation in all measured temperature ranges, whereas for the Bi melt, the curve presents obvious non-Newtonian feature within the low temperature range and at relative high shear stress. The rheology feature of Sb80Bi20 and Sb20Bi80 alloy melts was well correlated with that of Sb and Bi, respectively. It is considered that the rheology behavior of Sb melt plays a crucial role in Sb80Bi20 alloy and that of Bi melt plays a crucial role in Sb20Bi80 alloy.