Isodynamic Compaction, Sintering and Forging of Titanium and Titanium alloy Powders

钛及钛合金粉末的等压成型、烧结和锻造

• 批准号: 60550481
• 负责人: SATO Yasuhisa
• 金额: $ 1.28万
• 依托单位: TOHOKU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1985
• 资助国家: 日本
• 起止时间: 1985 至 1986
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-60550481/
• 关键词: Titanium Powder; Ti-6Al-4V Powder; Isodynamic Compaction; CIP; Sintering; High Speed Forging; 衝撃通電固化

Effects of the rates of isodynamic compaction of Ti and Ti-6Al-4V powders on the physical and mechanical properties of these green and sintered components was investigated. The order of mean compaction-rate ( <-!・!(epsilon)_V> ) defined as <(1/t_a)1n(V_o/V_a)> <(=(1/t_a)1n(rho_a)/(rho_o))> is <10^(-3)s^(-1)> for quasi-static compaction and it is <10^2s^(-1)> for dynamic compaction, where V, <rho> and t denote volume, density of powder and time, respectively and suffix o and a denote initial and final state, respectively.1. Isodynamic compaction of Ti powder(1)The strength, sealing and life of pressure vessel at the isodynamic condition are better than at the isostatic. (2)Compaction energy - relative density curves show less energy is required to achieve the same density if compaction is carried out at high speed. However, peak pressure - relative density curves show that as the rate of compaction is increased the pressure required to achieve a given density must also be increased. (3) … More The deairing from rubber bags containing pre-compacts is essential to obtaining sound green compacts.2. Electrical discharge pre-compaction and isodynamic compaction of Ti-6Al-4V powder(1) The magnetic field shaper under the electrical discharge compaction conditions is useful for densifying the powders. (2)The effects of rate of isodynamic compaction on the density and bending strength of green compacts is not clearly recognized.3. Sintering of Ti and Ti-6Al-4V compactsLow and high density level compacts manufactured by low and high rates of isodynamic compaction were sintered at five temperature (1000, 1100, 1200, 1300, 1400゜ C) and soaked for three periods of time (15, 60 and 150 min). It was evident from the results that sintering time had comparatively less influence on the properties of sintered parts than that of sintering temperature. (1) For Titanium the sintering temperature 1200゜C is optimum, since the density, tensile strength, elongation and area-reduction of sintered parts are found to be maximum at that temperature. (2) For Ti-6Al-4V the most suitable sintering temperature may be 1300゜C, since the elongation and area-reduction of sintered parts are fornd to be maximum at that temperature. Less

研究了Ti和Ti-6Al-4V粉末的等动态压制速率对这些绿色和烧结部件的物理和机械性能的影响。平均扩散率（<-！·！准静态压实和动态压实中，V_i和t分别表示粉末体积、粉末密度和时间，后缀o和a分别表示初始状态和最终状态，定义为&lt;（1/t_a）1 n（V_o/V_a）&gt;&lt;（=（1/t_a）1 n（rho_a）/（rho_o））&gt;，其中V_<rho>i和t分别表示粉末体积、粉末密度和时间。钛粉的等动压制（1）压力容器在等动条件下的强度、密封性和寿命均优于等静压条件。（2）压实能量-相对密度曲线表明，如果高速压实，则实现相同密度所需的能量更少。然而，峰值压力-相对密度曲线表明，随着压实速率的增加，达到给定密度所需的压力也必须增加。（三） ...更多信息 从装有预压实件的橡胶袋中脱气对于获得良好的绿色包装至关重要。Ti-6Al-4V粉末的放电预压和等动压（1）放电压制条件下的磁场整形器有利于粉末的致密化。（2）等静压率对绿色压坯密度和抗弯强度的影响尚未得到明确认识. Ti和Ti-6Al-4V坯体的烧结通过低和高速率等动态压实制造的低和高密度水平坯体在五个温度（1000、1100、1200、1300、1400 ℃）下烧结，并均热三个时间段（15、60和150 min）。结果表明，烧结时间对烧结件性能的影响小于烧结温度。(1)对于钛，烧结温度1200 ℃是最佳的，因为烧结部件的密度、抗拉强度、伸长率和面积减少率在该温度下最大。(2)对于Ti-6Al-4V合金，最适宜的烧结温度为1300 ℃，因为在此温度下烧结件的伸长率和断面收缩率最大。少

项目成果

佐藤裕久: 昭和62年度塑性加工春季講演会講演論文集. (1987)

Hirohisa Sato：1985 年春季可塑性讲座论文集 (1987)。

佐藤裕久: 日本機械学会東北支部・精密工学会東北支部仙台地方講演会(東北支部 第22期総会講演会)講演会概要集 No.871-1. 75-76 (1987)

佐藤博久：日本机械工程学会东北分会、日本精密工程学会东北分会、仙台地方讲座（东北分会第22次大会）讲座摘要第871-76号（1987年）。

Yasuhisa Sato: "Isodynamic Compaction of Titanium Powder" Proc. of '87 International Symposium & Exhibition on Science and Technology of Sintering, Tokyo, Japan. (1987)

Yasuhisa Sato：“钛粉的等动力压实”Proc。

Sato Yasuhisa: Proc.of '87 International Symposium & Exhibition on Science and Technology of Sintering,Tokyo,Japan,. (1987)

佐藤泰久：Proc.of 87 国际研讨会

Yasuhisa Sato: "Dynamic Uniaxial Compaction of Titanium Powder" Proc. of Tohoku Branch Joint Conference for JSME and JSPE (in Japanese). 75-76 (1987)

Yasuhisa Sato：“钛粉的动态单轴压实”Proc。