制造业远程服务系统的设计与实现

制造业远程服务系统作为一种全新的概念随着信息技术和网络技术的发展而提出。本文先从总体上介绍了制造业远程服务系统,然后具体讨论了制造业远程服务系统的设计与实现,最后结合中德政府合作项目面向上海大众汽车有限公司的具体应用给出应用实例。     

双相不锈钢复合钢板的焊接

举世瞩目的三峡工程在排砂钢管的制作安装中,选用了双相不锈钢复合钢板,这在国内水电建设中尚属首次.而双相不锈钢复合钢板的焊接在金属结构制作安装中要求高,难度大.为此进行了大量的工艺评定、焊工培训以及产品焊接等应用研究.较全面地掌握了双相不锈钢复合钢板的焊接技术,保证了三峡工程金属构件的制造安装.     

轻钢屋架在大吨位吊车厂房中的应用

由于本次大吨位吊车厂房设计工程系在原大红山铜矿一期工程的基础上进行扩建,而一期工程采用的CG516图集与新修订的CG517图集对上下弦杆及复杆的截面要求有所不同,且新图集的吊车起重量要求较小,与本工程的起重量32 t相差甚远。为了确保吊车运行安全及厂房屋盖系统的稳定,笔者对吊车梁顶的横向水平位移及屋架下弦轴力等参数进行了一系列的计算,确定了排架柱截面及屋盖结构方案,并得出了一些实际可行的结论,满足了工程设计的要求。     

Ternary iron phase diagram updates

This addendum is intended to provide updates on phase diagrams of ternary iron al-loys, which were published as a series of monographs by the cooperating societies: ASM International, Indian Institute of Metals, and the Institute of Materials (Lon-don). Updates on 14 systems reviewed in Part 1 of the series were published inJ Phase Equilibria, 14(5), 6145-633 (1992). This issue contains updates on 12 sys-tems from among those reviewed by Raynor and Rivlin, which was published as part 4 of the Series by the Institute of Materials (London) in 1988. The second and third installments of the updates from Part 4 will follow in the future issues of this journal.     

CAI与工程制图课

本文探讨了CAI与工程制图课的关系和工程制图CAI的模式和特色，以及如何应用CAI更好的服务于工程制图教学。     

一种异形冲压件对称成形工艺的研究

通过一种异形冲压件加工方法的分析，从方案一的初始对称成形到方案二的单件成形、再到方案三的对称重组（重新组成新的对称形状）成形，介绍了工艺设计的改进过程。结果表明，对称重组的成形工艺，提高了产品可加工性，降低了加工成本。     

Synthesis and characterization of metallic Pd embedded TiO2 nanoparticles by reverse micelle and sol-gel processing

This research was financially supported by the Ministry of Education, Science Technology(MEST) and Korea Industrial Technology Foundation(KOTEF) through the Human Resource Training Project for Regional Innovation.     

《钢管》杂志伴随我国焊管工业共同成长——贺《钢管》杂志创刊50周年

回顾了我国焊管工业的成长历程,并以东北"八三"管道、陕京输气管道、苏丹原油外输管道、西气东输工程为例,分述了各阶段的焊管工业发展和产品开发情况;简述了我国焊管行业学术活动的相关情况,认为《钢管》杂志在传播先进机组、交流发展经验等方面起到了重要作用。     

In the news

This Research was sponsored by the Ceramic Technology Project, DOE Office of Transportation Technologies, under contract DE-AC05-84OR21400 with Martin Marietta Energy Systems, Inc. Reprinted with permission from ORNL Ceramic Technology Newsletter, No. 38, Jan.–March, 1993.     

自动焊技术在西气东输二线工程中的应用

以西气东输二线工程用X80钢管为研究对象,采用STT半自动根焊＋PAW2000全位置自动焊填充、盖面焊接方法,在选择的焊接工艺参数条件下,对X80钢管进行了焊接,并对焊接接头的力学性能进行了研究。结果表明各项性能指标均符合Q／SYGJX0110—2007标准,选定的焊接工艺完全满足现场自动焊施工的技术要求。此工艺成功用于西气东输二线工程,取得了优良的焊接效果。     

Introduction to The Chinese Journal of Nonferrous Metals

The Chinese Journal of Nonferrous Metals is a high-tech academic journal authorized by the China Association for Science and Technology, sponsored by The Nonferrous Metals Society of China and published by the Science Press of China. It was started in October 1991. It is published quarterly in 1991-1999, bimonthly in 2000-2003, and monthly from 2004. It is distributed overseas by the China International Book Trading, Corooration.     

爆炸法消除三峡工程高强钢压力钢管焊接残余应力

对三峡工程采用的６０ｍｍ厚ＮＫ－ＨＩＴＥＮ６１０Ｕ２调质高强钢对接和角度均焊接度板进行爆炸处理。结果表明爆炸处理不仅显著消除试板表面的拉伸残余应力,而且能使残余应力沿厚度方向分布均匀且显著降低。     

螺旋埋弧焊管常见成型工艺缺陷产生原因及预防措施

以川气东送工程用X70钢级Ф1016mm×17．5mm螺旋埋弧焊管生产为例,结合成型与焊接的关系,介绍了高强度、大壁厚螺旋埋弧焊管生产过程中常见的成型工艺缺陷（如管径超差、错边、“噘嘴”、裂纹等）,分析其产生的原因,并针对性地采取相应的预防措施,不仅提高了钢管成型质量,同时在提高焊接质量和焊速,降低工人劳动强度以及提高设备利用率等方面均有较好的效果。     

快堆工程用不锈钢大锻件的研制

研制了用于中国实验快堆工程堆芯和氩气衰变罐的不锈钢 ( 3 0 4、3 0 4H)大锻件共 1 6件 ,最大为 1 3 70 / 1 1 90× 2 1 1 0 m m。夹杂物 (包括氮化物 ) 0 .5～ 1 .0级 ;奥氏体晶粒度 5级 ;σ0 .2 ( 5 5 0 ) >1 60 MPa;超声波探伤未发现≥ 2 mm当量缺陷。产品全部一次验收合格 ,已交付使用     

The DOE advanced gas reactor fuel development and qualification program

The high outlet temperatures and high thermal-energy conversion efficiency of modular high-temperature gas-cooled reactors (HTGRs) enable an efficient and cost-effective integration of the reactor system with non-electricity-generation applications, such as process heat and/or hydrogen production, for the many petrochemical and other industrial processes that require temperatures between 300°C and 900°C. The U.S. Department of Energy (DOE) has selected the HTGR concept for the Next Generation Nuclear Plant (NGNP) Project as a transformative application of nuclear energy that will demonstrate emissions-free nuclear-assisted electricity, process heat, and hydrogen production, thereby reducing greenhouse-gas emissions and enhancing energy security. The objective of the DOE Advanced Gas Reactor (AGR) Fuel Development and Qualification program is to qualify tristructural isotropic (TRISO)-coated particle fuel for use in HTGRs. An overview of the program and recent progress is presented.     

Microbiologically Influenced Corrosion of copper in potable water installations – a European project review

Copper tubes are considered as material of choice for most domestic and institutional plumbing requirements. However, to a few instances problems have arisen which were shown to involve microbiological activity. The BRITE/EURAM Project “New Types of Corrosion Impairing the Reliability of Copper in Potable Water Caused by Microorganisms” (Contract-No. BREU-CT 91-0452) was launched to examine the interactions between microorganisms and their secreted products and a copper tube surface involving a cross-disciplinary consortium. A review of this project is reported in this contribution. Based upon chemical analysis of biofilms from failed copper tubes, it was possible to develop model biopolymers of defined composition and well characterised surface adsorption properties to establish suitable electrochemical test procedures. Culture biopolymers showing similar chemical compositions could be produced from a range of copper-pitting-associated bacteria. It was possible to demonstrate cation selective behaviour by layers of these relevant model and culture biopolymers. Two linked copper electrodes, one hare and the other coated with a cation selective biopolymer, were shown to establish a corrosion element. The covered areas acted as the cathode whilst the bare areas were anodic. This was also seen in single metal samples with disrupted polymer coatings giving “bare” patches. In anodic areas the corrosion follows a chloride induced mechanism leading to repassivation of the surface. This could also be demonstrated in the original potable water taken from an institutional building affected by Microbially Influenced Corrosion (MIC). Sulphate ions inhibit this expected passivation process. The basic corrosion process appears to follow the chloride model, but this can become overshadowed by the effects of additional anions such as sulphate and bicarbonate.     

粉煤灰堆坝新技术的应用

针对粉煤灰粒径较细、排水固结快等特性,采用了在堆坝体内设置土工格网、排水板等新技术,并结合灰场的地形条件,利用粉煤灰堆坝.该技术具有因地制宜、节省投资、满足生产需要等特点.     

HVOF-Sprayed Coatings Engineered from Mixtures of Nanostructured and Submicron Al<Subscript>2</Subscript>O<Subscript>3</Subscript>-TiO<Subscript>2</Subscript> Powders: An Enhanced Wear Performance

In previous studies, it has been demonstrated that nanostructured Al₂O₃-13 wt.%TiO₂ coatings deposited via air plasma spray (APS) exhibit higher wear resistance when compared to that of conventional coatings. This study aimed to verify if high-velocity oxy-fuel (HVOF)-sprayed Al₂O₃-13 wt.%TiO₂ coatings produced using hybrid (nano + submicron) powders could improve even further the already recognized good wear properties of the APS nanostructured coatings. According to the abrasion test results (ASTM G 64), there was an improvement in wear performance by a factor of 8 for the HVOF-sprayed hybrid coating as compared to the best performing APS conventional coating. When comparing both hybrid and conventional HVOF-sprayed coatings, there was an improvement in wear performance by a factor of 4 when using the hybrid material. The results show a significant antiwear improvement provided by the hybrid material. Scanning electron microscopy (SEM) at low/high magnifications showed the distinctive microstructure of the HVOF-sprayed hybrid coating, which helps to explain its excellent wear performance. This article is an invited paper selected from presentations at the 2007 International Thermal Spray Conference and has been expanded from the original presentation. It is simultaneously published in Global Coating Solutions, Proceedings of the 2007 International Thermal Spray Conference, Beijing, China, May 14-16, 2007, Basil R. Marple, Margaret M. Hyland, Yuk-Chiu Lau, Chang-Jiu Li, Rogerio S. Lima, and Ghislain Montavon, Ed., ASM International, Materials Park, OH, 2007.     

Correction to: Calibration of Laser Penetration Depth and Absorptivity in Finite Element Method Based Modeling of Powder Bed Fusion Melt Pools

Metals and Materials International - In the original publication of the article, Fig.&nbsp;15 was published incorrectly.