Journal of Japan Foundry Engineering Society最新文献_第9页

Estimation of Fatigue Life in Aluminum Alloy Die Castings with Artificial Defect 人工缺陷铝合金压铸件疲劳寿命的估算

Journal of Japan Foundry Engineering Society Pub Date : 2007-02-25 DOI: 10.11279/JFES.79.90

K. Konagaya, Tatsuya Yamahata, S. Aoyama, N. Suzuki, Kazuki Horiuchi, K. Kanazawa

引用次数: 0

Ti-Al Based Intermetallic Compounds Produced by SHS and Coated on Spheroidal Graphite Cast Iron SHS制备Ti-Al基金属间化合物并在球墨铸铁表面涂覆

Journal of Japan Foundry Engineering Society Pub Date : 2007-01-25 DOI: 10.11279/JFES.79.17

A. Ikenaga, Ryohei Yamakawa, A. Nakahira, A. Okamoto, T. Sone

引用次数: 0

Influence of Component Elements of Flake Graphite Cast Iron on Pinhole Generation during Arc Welding 片状石墨铸铁组成元素对电弧焊中针孔产生的影响

Journal of Japan Foundry Engineering Society Pub Date : 2007-01-25 DOI: 10.11279/JFES.79.9

Tohru Mizuki, T. Kanno, H. Horie, S. Hiratsuka, Takumi Hareyama

引用次数: 0

Influence of Carbon and Chromium on Mechanical and Hot Wear Properties of Multi-component White Cast Irons for Steel Rolling Mill Rolls 碳和铬对轧钢用多组分白口铸铁力学性能和热磨损性能的影响

Journal of Japan Foundry Engineering Society Pub Date : 2007-01-25 DOI: 10.11279/JFES.78.238

Hashimoto Mitsuo, Yasuyuki Nishiyama, N. Sasaguri, Y. Matsubara

{"title":"Influence of Carbon and Chromium on Mechanical and Hot Wear Properties of Multi-component White Cast Irons for Steel Rolling Mill Rolls","authors":"Hashimoto Mitsuo, Yasuyuki Nishiyama, N. Sasaguri, Y. Matsubara","doi":"10.11279/JFES.78.238","DOIUrl":"https://doi.org/10.11279/JFES.78.238","url":null,"abstract":"Multi-component white cast irons are becoming increasingly popular as materials for rolling mill rolls due to its excellent wear resistance. In this research, influence of carbon (C) and chromium (Cr) contents on mechanical properties, hot wear properties and their correlation were investigated using Fe-5%Mo5%W-5%V-5%Co-Cr-C alloy. Martensitic matrix was obtained in a wide area with Cr content more than 5% and carbon-balance (Cba1) of :! 0.8%. Hardness was over 600HV. Ferrite or pearlite was formed in areas with low Cbal , and lamellar pearlite in areas with high Cba1 and low Cr. Austenite was found to partially remain in 1%C-I0%Cr iron. Macro-hardness and matrix hardness basically showed similar tendency and macro-hardness was higher than matrix hardness for pearlite matrix. The maximum tensile strength was 1006MPa in 1.5%C之.5%Criron. Low matrix hardness and a large carbide content decreased tensile strength. Compressive 0.2% proof strength showed a maximum value of 2.14GPa in 1.5%C司7.5% Cr iron. Hardness of above 600HV and chemical composition of more than 5% and Cr content -1 % to + 1 % Cbal content are desirable for achieving 0.2% proof strength necessary to withstand Hertzian contact stress in the finishing train of hot strip mill . Fracture toughness was high in high hardness areas and it decreases in cast irons with excess carbide and low matrix hardness. Wear resistance was basically better in cast irons with high hardness and high fracture toughness.","PeriodicalId":190136,"journal":{"name":"Journal of Japan Foundry Engineering Society","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132893219","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Fabrication of Al Alloy Foams and Evolution Mechanism of Hydrogen Bubbles 铝合金泡沫的制备及氢泡的演化机理

Journal of Japan Foundry Engineering Society Pub Date : 2007-01-25 DOI: 10.11279/JFES.79.3

K. Kadoi, H. Nakae

引用次数: 0

Numerical Simulation of Suction Fluidity Test of Flake Graphite Cast Iron 片状石墨铸铁吸力流动性试验的数值模拟

Journal of Japan Foundry Engineering Society Pub Date : 2006-12-25 DOI: 10.11279/JFES.78.675

S. Hiratsuka, Takumi Hareyama, H. Horie

引用次数: 1

Mold Filling Simulation by Finite Difference Method with High Order Scheme in Regular Cartesian Grid 正则笛卡尔网格高阶格式有限差分法充型模拟

Journal of Japan Foundry Engineering Society Pub Date : 2006-12-25 DOI: 10.11279/JFES.78.629

T. Sawada, K. Anzai

{"title":"Mold Filling Simulation by Finite Difference Method with High Order Scheme in Regular Cartesian Grid","authors":"T. Sawada, K. Anzai","doi":"10.11279/JFES.78.629","DOIUrl":"https://doi.org/10.11279/JFES.78.629","url":null,"abstract":"Finite difference methods in the regular Cartesian grid are often used for mold filling simulations. The main advantages of these methods are memory and CPU saving and ease of grid generation compared to other unstructured methods. However, representation accuracy of casting shape is very poor; for example, slopes or curves are represented as stair-steps. Therefore, in such cases, calculated results are rarely consistent with the actual phenomena. However, these disagreements are not only caused by poor shape representation but also by the numerical error of the upwind scheme. In other words, high order schemes are expected to provide more accurate solutions without improving stair-step representation of the casting shape. The aim of this work was to investigate the stair-step representation, and to improve the accuracy of numerical analysis by the CIP CConstrained Interpolation Profile) method as high order scheme. By speculating the problems of stair-step approximation, it was found that inappropriate pressures are caused by numerical deterioration of fIow velocity. The decay is proportional to the n-th power of the Courant number, ifthe accuracy of the scheme is in the time-space n-th order. In general , the Courant number is less than 1. So the error of stair-step representation can be reduced by using the high order scheme. Some problems were solved by the upwind scheme and CIP method. In the simulated results by the upwind scheme, the error of stair-step generated strongly. On the other hand, itwas found that CIP method reduces the error.","PeriodicalId":190136,"journal":{"name":"Journal of Japan Foundry Engineering Society","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114127318","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Numerical Experiment of Cold Flakes Behavior in Shot Sleeve of Aluminum Alloy Die Casting 铝合金压铸件丸套冷片行为的数值试验

Journal of Japan Foundry Engineering Society Pub Date : 2006-12-25 DOI: 10.11279/JFES.78.654

Y. Maeda, H. Nomura

{"title":"Numerical Experiment of Cold Flakes Behavior in Shot Sleeve of Aluminum Alloy Die Casting","authors":"Y. Maeda, H. Nomura","doi":"10.11279/JFES.78.654","DOIUrl":"https://doi.org/10.11279/JFES.78.654","url":null,"abstract":"With growing needs for thin wall and weight-saving products, production quantity of aluminum alloy is increasing more and more. It is important to control casting conditions in order to obtain sound and highly functional products. The present study focused on the cold flakes in the shot sleeve of aluminum alloy die casting. The solidified layer generated in the early stages of die casting when the molten metal is charged in contact with the bottom of the sleeve, and exfoliated with the movement of the plunger, yielding the cold flakes. If the cold flakes flow into the cavity region, the mechanical properties of product will deteriorate. To predict casting defects caused by cold flakes, numerical simulation was performed to analyze the dynamic behaviors of the cold flakes. The conditions for the generation of the cold flakes and the equations of motion including gravity, buoyancy, fluid drag were established in the present study. The movement of cold flakes was traced by solving momentum equations by the Runge-Kutta-Gill method. The calculated results showed that the behavior of cold flakes vary according to conditions such as initial temperature of molten metal, sleeve temperature, etc.","PeriodicalId":190136,"journal":{"name":"Journal of Japan Foundry Engineering Society","volume":"103 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132139996","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Automatic Riser Design by Quantitative Prediction of Shrinkage Cavity 缩孔定量预测自动冒口设计

Journal of Japan Foundry Engineering Society Pub Date : 2006-12-25 DOI: 10.11279/JFES.78.661

Isamu Takahashi, T. Uchida, K. Anzai

引用次数: 2

Direct Observation and Numerical Simulation of Mold Filling 充型过程的直接观察与数值模拟

Journal of Japan Foundry Engineering Society Pub Date : 2006-12-25 DOI: 10.11279/JFES.78.691

A. Sugiyama, I. Ohnaka, J. Iwane, H. Yasuda

引用次数: 4