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

为了开发糊状锻炼阻力加热，经验和有限的元素是A357 A357铝合金方坯的阻力加热特性，并找出了稳定且均匀的方坯加热的措施。在铜和方向盘加热的功效中，铜和钢轮上的速度是在热隔热器中进行的同时，强烈希望在ACT压力中尽可能多地抑制钢坯，但是过度的减少会导致钢轮和热剂之间的启动，并停止锻造操作。在关系中，d在dement的关系中，均匀的助焊剂是均质的助攻效率。 - 铝的锻造是为了调查输入电能的形成含量和锻造的结果使用的热绝缘体的厚度与每个壳体相对应

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