18m^3大型冶金渣罐的生产

讲述了冶金渣罐的性能及质量要求，通过结构分析，确定制造渣罐所选用的工艺方案和工艺参数，以及生产过程中的质量控制等，摸索出了一些超大型薄壁铸件的生产技术经验，具有较大的经济和社会效益。     

冲天炉熔渣处理工艺改进

为节能降耗,降低铸件生产成本,改善作业环境,以渣罐接液体渣工艺替代水电消耗量较大,系统故障多,污染环境,操作复杂的冲天炉炉渣水冲粒化工艺.渣罐接液体渣工艺操作简便,节约了水电耗费,避免产生水蒸气和有害气体,实现了节能降耗和作业环境友好.     

6m^3大断面球铁渣罐的铸造

炼钢生产中使用的钢渣罐是一种消耗性冶金附具。中国一重集团公司炼钢分厂使用的６ｍ３渣罐单重１３５０ｋｇ，主要壁厚１００ｍｍ。过去该渣罐一直使用ＨＴ２００普通铸铁制造，使用寿命较短，在年产钢８～１０万吨的情况下，平均年耗渣罐为１３～１４件；而且其质量也不...     

大型炼钢用10m3渣罐的铸造工艺

针对大型渣罐类铸件存在的技术难题进行了工艺研究,在木模、工装、化学成分、浇注系统等方面进行优化设计,生产出合格的产品,为今后同类产品的生产积累经验.     

电渣冶金法生产大型钢锭综述

介绍了采用电渣重熔、电渣焊接、电渣浇注和电渣热封顶法生产大型钢锭的工艺,并从钢锭质量、节能、成本等方面对比了上述4种方法的工艺特点.电渣重熔法生产的大型钢锭纯净度和组织均匀性较高,产品质量较好,但工艺设备复杂;电渣焊接法、电渣浇铸法和电渣热封顶法相比电渣重熔法,工艺和设备简单,能耗、成本较低,但产品质量较差.     

大型铸铁件砂型铸造生产实践

介绍了我国大型铸铁件的生产历史和发展特点,指出铁液温度和供给量的正确控制、起重能力的合理选择、地坑设置及队伍建设是生产大型铸铁件的独有和不可缺少的基本条件,并用渣罐、泵体和机床床身的生产实例来说明大型铸铁件的工艺特点。     

用高强度铸铁加工核渣罐的展望

本文展示了球墨铸铁用于生产核渣罐与用锻钢相比的优势。通过熔炼工艺，铸造工艺，孕育工艺来提高从-50℃到300℃之间的相对伸长率和断裂韧度。对球墨铸铁截面上取样的力学性能的研究表明上述工艺保证了铸件性能完全能达到同样的国外类似产品的性能要求。     

电渣离心浇铸炼镁还原罐

概述了电渣离心浇铸炼镁还原罐的原理、工艺和特点,并分析了新工艺获得高质量产品的原因。     

大型铸钢件渣罐的制造

为生产大型铸钢件渣罐,设计制作了高箱带高强度盖箱,采用两台电弧炉同时熔炼、原地清砂、原地气割冒口等措施,解决了无法生产此铸件的问题。通过工艺分析,选择适当的浇冒口系统、浇注温度等,生产出符合设计要求的合格铸钢件。     

16m3渣罐的工艺设计与生产

对16m3渣罐铸钢件的结构及生产工艺进行综合分析,阐述了该铸件的铸造工艺及生产经验.并针对其尺寸超大难以控制的特点,提出了刮板制芯、分体模样、预埋吊轴铸钢件的新思路.通过采用保温冒口及冒口覆盖剂等工艺措施,有效地防止了裂纹和缩松的产生,生产出了合格铸件,为类似铸件的生产提供了借鉴方法.     

Effects of Post-weld Heat Treatment on Microstructure,Mechanical Properties and the Role of Weld Reinforcement in 2219 Aluminum Alloy TIG-Welded Joints

In as-welded state, each region of 2219 aluminum alloy TIG-welded joint shows diff erent microstructure and microhardness due to the diff erent welding heat cycles and the resulting evolution of second phases. After the post-weld heat treatment, both the amount and the size of the eutectic structure or θ phases decreased. Correspondingly, both the Cu content in α-Al matrix and the microhardness increased to a similar level in each region of the joint, and the tensile strength of the entire joint was greatly improved. Post-weld heat treatment played the role of solid solution strengthening and aging strengthening. After the post-weld heat treatment, the weld performance became similar to other regions, but weld reinforcements lost their reinforcing eff ect on the weld and their existence was more of an adverse eff ect. The joint without weld reinforcements after the post-weld heat treatment had the optimal tensile properties, and the specimens randomly crack in the weld zone.     

The First Phase of the SRIF Industrialized Base in ＂West Area＂ Has Been Put into Operation

After nearly two years＇ tense construction, the first phase of industrialized base of Shenyang Research Institute of Foundry （SRIF）, located at the Tiexi Casting and Forging Industrial Park in the west of Tiexi District, has now been completed and formally put into operation.     

Effect of Rare Earth Doping on Impedance,Modulus and Conductivity Properties of Multiferroic Composites:0.5(BiLa_xFe_(1-x)O_3)–0.5(PbTiO_3)

The Lanthanum-doped bismuth ferrite–lead titanate compositions of 0.5(Bi LaxFe1-xO3)–0.5(Pb Ti O3)(x = 0.05,0.10,0.15,0.20)(BLxF1-x-PT) were prepared by mixed oxide method.Structural characterization was performed by X-ray diffraction and shows a tetragonal structure at room temperature.The lattice parameter c/a ratio decreases with increasing of La(x = 0.05–0.20) concentration of the composites.The effect of charge carrier/ion hopping mechanism,conductivity,relaxation process and impedance parameters was studied using an impedance analyzer in a wide frequency range(102–106Hz) at different temperatures.The nature of Nyquist plot confirms the presence of bulk effects only,and non-Debye type of relaxation processes occurs in the composites.The electrical modulus exhibits an important role of the hopping mechanism in the electrical transport process of the materials.The ac conductivity and dc conductivity of the materials were studied,and the activation energy found to be 0.81,0.77,0.76 and 0.74 e V for all compositions of x = 0.05–0.20 at different temperatures(200–300 °C).     

Quantitative Analysis of the Crystallographic Orientation Relationship Between the Martensite and Austenite in Quenching–Partitioning–Tempering Steels

The orientation relationships(ORs)between the martensite and the retained austenite in low-and medium-carbon steels after quenching–partitioning–tempering process were studied in this work.The ORs in the studied steels are identified by selected-area electron diffraction(SAED)as either K–S or N–W ORs.Meanwhile,the ORs were also studied based on numerical fitting of electron backscatter diffraction data method suggested by Miyamoto.The simulated K–S and N–W ORs in the low-index directions generally do not well coincide with the experimental pole figure,which may be attributed to both the orientation spread from the ideal variant orientations and high symmetry of the low-index directions.However,the simulated results coincide well with experimental pole figures in the high-index directions{123}_(bcc).A modified method with simplicity based on Miyamoto’s work was proposed.The results indicate that the ORs determined by modified method are similar to those determined by Miyamoto’method,that is,the OR is near K–S OR for the low-carbon Q–P–T steel,and with the increase of carbon content,the OR is closer to N–W OR in medium-carbon Q–P–T steel.     

The Mirror with Patterns of Auspicious Animals and Grapes——Exquisite cast mirror and the technology of surface tin-enrichment by rubbing-in and infiltration of tin-rich powder

<正>Bronze mirrors were used by the Chinese people before the introduction of the glass mirror.Only after it was replaced by the glass mirror did the bronze mirror gradually retreat from people's lives.Different styles of bronze mirrors were made in different historical periods,particularly in the Warring States Period,the Han and Tang Dynasties,which were the three peaks of the development of bronze mirror arts in ancient China.The casting techniques were exquisite.The surface of the bronze mirror was smooth and bright enough to reflect one's image,and there were scarcely any casting defects on the mirror surface.On the back of the bronze mirror,there were rich depictions of Arts and Humanities,and the ornamentations were also     

The 9th China International Diecasting Congress & Exhibition

The 9th China International Diecasting Congress ＆ Exhibition was held on July 22-24, 2014 at Shanghai New International Expc Centre. This exhibition was the most successful over the years, with over 6890 visitors and 155 exhibitors, and the exhibition area increased by 30% from 9,500 square meters in 2012 to 12340 square meters. Die casting enterprises from a total of 24 countries and regions, including China mainland, Chinese Taiwan and Hong Kong, South Korea, Japan, Germany, India, Thailand, Malaysia, the United States, Russia, Australia, Iran, Ukraine, Brazil, Colombia, Singapore, Austria, Canada, Croatia, France, Turkey, United Kingdom, Vietnam, attended the congress and exhibition.     

Introduction of the Fluid Control Engineering Institute of Kunming University of Science and Technology

正The Fluid Control Engineering Institute of Kunming University of Science and Technology was set up in 1996.The researches of institute concentrate on electro-hydraulic(pneumatic)servo/proportional control and hydromechatronics.The Institute is committed to research and development of electro-hydraulic control of high-end technical equipment in ferrous metallurgy refining produc-     

RARE METALS Volume Contents

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Antimony Induced Crystallization of Amorphous Silicon

Antimony induced crystallization of PVD (physics vapor deposition) amorphous silicon can be observed on sapphire substrates. Very large crystalline regions up to several tens of micrometers can be formed. The Si diffraction patterns of the area of crystallization can be observed with TEM (transmission electron microscopy). Only a few and much smaller crystals of the order of 1μm were formed when the antimony layer was deposited by MBE (molecular beam epitaxy) compared with a layer formed by thermal evaporation. The use of high vacuum is essential in order to observe any Sb induced crystallization at all. In addition it is necessary to take measures to limit the evaporation of the antimony.     

A CUMULATIVE FATIGUE DAMAGE RULE UNDER THE ALTERNATIVE OF CORROSION OR CYCLIC LOADING

Fatigue damage increases with the applied loading cycles in a cumulative manner and the material deteriorates with the corrosion time. A cumulative fatigue damage rule under the alternative of corrosion or cyclic loading was proposed. The specimens of aluminum alloy LY12-CZ soaked in corrosive liquid for different times were tested under the constant amplitude cyclic loading to obtain S-N curves. The test was carried out to verify the proposed cumulative fatigue damage rule under the different combinations among corrosion time, loading level, and the cycle numbers. It was shown that the predicted residual fatigue lives showed a good agreement with the experimental results and the proposed rule was simple and can be easily adopted.