Forging of Heat Resisting Alloy with Ceramic Dies

陶瓷模具锻造耐热合金

• 批准号: 59850029
• 负责人: OSAKADA Kozo
• 金额: $ 3.46万
• 依托单位: HIROSHIMA UNIVERSITY (1985-1986)Kobe University (1984)
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Developmental Scientific Research
• 财政年份: 1984
• 资助国家: 日本
• 起止时间: 1984 至 1986
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-59850029/
• 关键词: Ceramics; Flexible Forging; Rigid-Plastic Finite Element Method; Simulation; Titanium Alloy; Nickel Alloy; Measurement of Friction; 摩擦測定; 潤滑剤; シミュレーション; チタニウム合金; 摩擦特性

This report describes a new forming method of heat resisting alloys in isothermal forging with ceramic dies.To develop a non-glass type lubricant suitable for ceramic dies, compression tests of ring-shape specimens of titanium alloys are carried out on a newly constructed apparatus at temperatures around 900゜C.From these results, it is found that a lubricant which consists of boric acid and boron nitride provides a very low friction for ceramic dies of <Al_2> <O_3> , SiC and <Si_3> <N_4> , when a ratio of boron nitride is in the range from 20 to 30%. Applying this lubricant with <Al_2> <O_3> dies, the lower friction than glass-type lubricant conventionally used in isothermal forging is obtained.By comparing the coefficients of friction for all the ceramic dies, it is clarified that <Al_2> <O_3> shows the lowest friction among the rest of ceramics.For confirming a principle of the new forming method, a mechanical press controlled by microcomputer is developed. Plasticine is formed to disk-shape product on the press. It is clarified that shape of product depends on forming conditions such as forming method, and it is necessary to determine shape of die teeth to finish surface of products smoothly. Deformation of plasticine is analyzed by using rigid-plastic finite element method and forging tests are carried out for various shapes of die teeth. The smooth surface is obtained by using dies with round corner.Conclusively, the feasibility of applying flexible forging system with ceramic dies to forming heat resisting alloys is clarified.

本报告描述了一种陶瓷模具等温锻造耐热合金的新成形方法。为了开发适用于陶瓷模具的非玻璃型润滑剂，在新建的设备上在900゜C左右的温度下对钛合金环形样品进行了压缩试验。从这些结果中发现，由硼酸和硼组成的润滑剂 当氮化硼的比例在20％至30％的范围内时，氮化物为<Al_2><O_3>、SiC和<Si_3><N_4>的陶瓷模具提供非常低的摩擦。将这种润滑剂应用于<Al_2><O_3>模具，可以获得比等温锻造中传统使用的玻璃型润滑剂更低的摩擦力。通过比较所有陶瓷模具的摩擦系数，可以看出<Al_2><O_3>在其余陶瓷模具中表现出最低的摩擦力。为了确认新成形方法的原理，控制机械压力机 是由微电脑开发出来的。橡皮泥在压力机上成型为盘状产品。明确了产品的形状取决于成形方法等成形条件，为了使产品的表面光滑，需要确定模具齿的形状。采用硬塑性有限元法对橡皮泥的变形进行了分析，并对各种形状的模齿进行了锻造试验。通过使用圆角模具获得了光滑的表面。最后，阐明了应用陶瓷模具柔性锻造系统来成形耐热合金的可行性。

项目成果

沖本邦郎: 中日超塑性学術論文集. 40-41 (1985)

冲本邦夫：中日超塑性学术论文 40-41 (1985)。

Kenichiro Mori: Advanced Technology of Plasticity. 【II】. 1009-1014 (1984)

森健一郎：可塑性的先进技术[II]。

Kunio, Okimoto: "Fabrication of a Magnetic Composite Material by Use of Zn-22Al superplastic powder" Proc. Japan-China Symposium on Technology of Plasticity "Superplasticity". 75-77 (1986)

Kunio，Okimoto：“使用 Zn-22Al 超塑性粉末制造磁性复合材料”Proc。

Kunio, Okimoto: "Influence of Atomizing Atmosphere and Heat-Treatment on Deformation Behavior of Zn-22Al Superplastic Pre-Alloy Powder Compacts" Proc. China-Japan Symposium on Technology of Plasticity "Superplasticity". 40-41 (1985)

Kunio, Okimoto：“雾化气氛和热处理对 Zn-22Al 超塑性预合金粉末压块变形行为的影响”Proc。

沖本邦郎: 日中超塑性シンポジウム論文集. 75-77 (1986)

Kunio Okimoto：日中超塑性研讨会论文集75-77（1986）。