Development of Mushy-state Forging Method Using Resistance Heating

电阻加热糊状锻造方法的开发

基本信息

批准号：
15560093
负责人：
MAKI Seijiro
金额：
$ 1.22万
依托单位：
Toyohashi University of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2004
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15560093/
关键词：
Semi-solid processing Mushy-state forging Resistance heating Aluminum alloys 温度解析

项目摘要

With an aim of developing a method for mushy-state forging using resistance heating, experiments and finite element simulations were carried out to clarify the resistance heating characteristics of A357 aluminum alloy billet and find out measures for stable and homogeneous billet heating. In the method, insertion of heat resistant, low thermal conductive austenitic stainless steel SUS304 discs between the copper electrodes and billet as thermal insulators was devised to improve the efficiency of the billet heating. In the original plan, using SUS304 stainless steel clad electrodes was planned, but the research was carried out in the mode of inserting the thermal insulators for easy operation of the experiments. In the resistance heating, it is necessary to apply a contact pressure between the electrodes and billet for ensuring their electric contacts. In the meanwhile, it is strongly desired to suppress the deformation of the billet as much as possible in the heating. It is possible to … More reduce the deformation by decreasing the applied contact pressure, but the excessive decrease causes sparking between the billet and thermal insulators and stops the forging operation. Then, first of all, the condition of the contact pressure on the spark occurrence was investigated in relation to the current density and it was made clear. And then, the thickness of the thermal insulators required for homogeneous billet heating was investigated in relations to both the current density and the contact pressure. Based on the findings through the investigations, experimental mushy-state forging of the aluminum alloy into a gear was made to investigate the influence on the forging condition of the operational conditions of the input electric energy and forging pressure. The results indicated that the mushy-state forging method is highly feasible but the metallurgical structure is strongly influenced by the thickness of the thermal insulators used. Therefore, proper adjustment of the thermal insulator thickness corresponding to each individual case is essential in the practical application. The findings obtained through this study were publicized as listed in the REFERENCES below. Less

为了开发一种用于使用阻力加热的肌肉状态遗忘的方法，进行了实验和有限元模拟，以阐明A357铝合金方坯的耐药性加热特性，并找出稳定且均匀的坯料加热的措施。在该方法中，随着热绝缘子的设计，将耐热的，低热导电的奥氏体不锈钢SUS304圆盘插入，以提高坯料加热的效率。在最初的计划中，计划使用SUS304不锈钢甲壳电极，但是该研究是以插入热绝缘子的方式进行的，以便于实验。在电阻加热中，有必要在电触点和方坯之间施加接触压力，以确保其电触点。同时，强烈希望在加热中尽可能抑制钢坯的变形。可以…通过降低施加的接触压力来增加变形，但是过量的减少是在方坯和热绝缘子之间引起的原因，并停止了原谅的操作。然后，首先，研究了与电流密度相关的接触压力条件，并清楚地研究了这一情况。然后，研究了与当前密度和接触压力的关系，研究了均质坯料加热所需的热绝缘子的厚度。根据调查的发现，实验性肌肉态遗忘了将铝合金遗忘成齿轮，以研究输入电能和锻造压力的操作条件的原谅状况的影响。结果表明，肌肉状宽恕的方法是高度可行的，但冶金结构受到使用的热绝缘子的厚度的强烈影响。因此，在实际应用中，适当调整与每个单独情况相对应的热绝缘子厚度至关重要。如下参考文献中列出了通过这项研究获得的发现。较少的

项目成果

期刊论文数量（30）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Application of Resistance Heating Technique to Mashy-State Forging of Aluminum Alloy

电阻加热技术在铝合金糊态锻造中的应用

DOI：
发表时间：
2004
期刊：
Journal of the Japan Society for Technology of Plasticity(in Japanese) 45-522
影响因子：
0
作者：
S.Maki;T.Shibata;K.Mori;Y.Harada;H.Makino
通讯作者：
H.Makino

半溶融鍛造用A357ビレットの抵抗加熱における電気接触性状の影響

电接触性能对A357半熔锻坯料电阻加热的影响