健全质量体系生产优质铸件

依据 Ｉ Ｓ Ｏ９００ １ 标准中的２０ 项要素，简要介绍了在铸造过程中的质量管理和质量保证体系。重点阐述铸件设计（ 工艺） 控制、工序控制、不合格品控制，纠正和预防措施。     

建立质量保证体系 提高铸件合格率

为了提高铸件的合格率,确保铸件质量,我们运用质量保证体系,将质量管理工作制度化、标准化和程序化,从而有效地保证了铸件的质量。具体做法如下: 一、有明确的质量方针和质量目标 我们根据厂部的方针和目标,提出本车间的方针是;优质、保安全、低消耗和夺高     

462汽车缸体铸件质量保证体系专家系统

应用Ｂｏｒｌａｎｄ Ｃ＋＋ ｆｏｒ Ｗｉｎｄｏｗｓ软件,建立４６２汽车缺体铸件质量保证体系专家系统,包括推理机（含缺陷识别及分析）、知识库、人机对话及输出平台。应用此软件,在定性分析缺陷的基础上,不仅能够预测４６２汽车缺体铸件废品率,而且可以采取定量措施控制铸件废品率在一定的范围内,达到 提高产品质量和经济效益的目的。以此专家系统为基础,改变知识库的相应内涵,就是一步开发成其他铸铁件的质量保证体系     

中小汽车铸件生产厂的技术改造途径

综合分析了国内中小汽车铸件生产企业的现状与问题，探讨了国内中小汽车铸件生产厂需要技术改造的必要性和迫切性。认为：做好形势分析，明确产品定位，整体规划，分步实施，工艺装备与检测手段配套，提高高附加值铸件的比例，建立完善的人才队伍和质量保证体系，延伸供应链，对铸件深加工等，是中小汽车铸件生产厂发展改造、提高经济效益的可行途径。     

“铸造质量专家FQExpert”的研制(1) 铸造生产过程质量保证体系

本文从全面质量管理(TQC)的角度分析了铸件生产过程质量保证体系,并提出了一个包括虚拟铸造、铸造生产过程控制和产品质量事后分析三部分的系统框架,阐述了各部分基本组成与功能。以该框架为基础,开发了“铸造质量专家FQExpert”系统,并简单介绍了其主要模块及其功能。     

GB／T19000标准与水玻璃砂质量控制

重点介绍了应用ＧＢ／Ｔ１９０００标准原理和方法,在铸钢生产企业中建立质量保证体系,加强质量管理,控制水玻璃砂生产铸钢件的全过程,提高了铸钢件质量保证能力。     

“铸造质量专家FQExpert”的研制（1）

本语文从全面质量管理（ＴＱＣ）的角度分析了铸件生产过程质量保证体系,并提出了一个包括虚拟铸造、铸造生产过程控制和产品质量事后分析三部分的系统框架,阐述了各部分基本组成与功能。以该框架为基础,开发了“铸造质量专家ＦＱＥｘｐｅｒｔ”系统,并简单介绍了其主要模块及其功能。     

铸件出口企业质量策划与控制基本知识

铸件质量包含产品质量、工艺过程质量和铸件设计质量。指出当前国内铸造企业存在的主要问题,说明铸造企业应当如何正确定位。介绍铸造过程的质量策划与控制、铸件质量的检测与控制、铸件防腐处理与包装和铸件成本核算与控制,以及人力资源合理配置的基本知识。     

汽车铸件的质量控制

介绍了汽车铸件生产过程质量控制的详细内容:包括铸造生铁、废钢、硅铁、锰铁及球化剂等铸造原辅材料的质量控制、型砂处理、造型、制芯、熔炼、浇注等工序质量控制、铸件材料质量、铸件尺寸、外观质量、铸件内部缺陷等质量控制。由于严格控制生产过程的结果,铸件废品率、铸件材料消耗、能耗等指标都逐年降低。     

全面质量管理基础知识讲座 第五讲 质量保证体系

一、为什么要建立质量保证体系我们试从一个实例说起,青岛铸造机械厂自1979年开始推行全面质量管理以来,取得较好的成绩:全厂举办了学习班,参加学习的人数占全厂职工的70％;结合生产实际成立了36个质量管理小组,攻克了34个质量关键,仅铸件废品率由1978年的9.87％下降到4.16％(1979年),可节约22.4万元;关键工序设立     

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.