TiAlの固相接合に関する研究

TiAl固相结合研究

• 批准号: 04239222
• 负责人: 大塚 正久
• 金额: $ 1.28万
• 依托单位: Shibaura Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research on Priority Areas
• 财政年份: 1992
• 资助国家: 日本
• 起止时间: 1992 至 无数据
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-04239222/
• 关键词: 金属間化合物; チタンアルミナイド; 固相接合; 拡散接合; 粉末冶金合金; 界面摺動; 継手効率

本研究では,われわれが考案した「界面摺動を利用した固相接合法」(以下,Twest Welding法-TW法-と略記)をTiAl系の金属間化合物P/M材にはじめて適用し,接合の微視過程および継手の組織と力学特性の関連を明かにすることを目的とした.この接合方法は従来法に比べて,(1)酸化皮膜をわずかな力で効果的に除去できる,(2)融点の約1/2の低温で速やかに接合できる,(3)接合時の変形量が少ない,(4)大気中でも接合可能,などの利点を有する。供試材としてのP/M材は接合試験片に加工済み.接合装置は右図に示すような雰囲気制御とトルク測定可能な回転摺動式圧接機を試作した.この装置の主な仕様は以下の通りである.到達温度=1000℃,最大荷重=2ton,最大摺動速度=10mms^<-1>(回転数20rpm),加熱方式=高周波加熱,到達真空度=10^<-5>Torr,負荷方式=1軸圧縮(油圧制御).装置の立上げと制能チェックはほぼ順調に進捗している.現在,温度・圧力・回転速度・回転距離・雰囲気・真空度・時間・表面粗さなどのパラメータと継手性能との関係を予備的に調べ始めており,次年度からの本格的実験に備えている.対象には,LiやMgなどの活性金属を含み非常に固相接合が困難とされているIN905XLを選んだ.右表のデータと組織観察結果から以下の諸点を指摘できる.(1)温度573〜673K(=約0.67Tm,Tmは融点の絶対温度),圧力30〜40MPa,6〜9回転において,大気中でも60〜70%の高い継手効率が得られる.加工歪も約1%と小さい.(2)継手の延性はしばしば母材のそれを凌ぐ.これは,本固相接合法が従来より優れることを示す.(3)表面粗さは継手強度に影響しない.(4)試料の外周部を除くと,回転摺動変位が0に近い中心軸でも良好な接合が達成される.(5)接合界面にいかなる形状の酸化膜もみられない.回転摺動により酸化膜が効果的に寸断されたためと思われる.

This study is based on the solid-phase bonding method using interface folding (hereinafter, Twest Welding method - TW method - (abbreviation) is suitable for TiAl-based intermetallic compound P/M materials and is suitable for joining. The microscopic process and the connection between the organization and the mechanical properties of the microscopic process and the purpose of the joint and the joining method.に比べて, (1) acidification film をわずかな力で にremoval できる, (2) melting point is about 1/2 of the low temperature でspeed No jointing is possible, (3) the amount of deformation at the time of jointing is small, (4) large joints are possible, and the advantages are small. The test material is P/M material and the joint test piece is processed. The joint device is shown in the right side. The following are the main parameters of the device that can be used to measure and control the pressure of the machine: a foldable pressure connection machine.の通りである. Reached temperature = 1000℃, maximum load = 2ton, maximum folding speed = 10mms^<-1> (return number 20rpm), heating method = high frequency heating, reached vacuum degree = 10^< -5>Torr, load mode = 1 shaft compression (oil pressure control). The device is equipped with a high-speed control system and a smooth adjustment system. Now, the temperature, pressure, return speed, return distance, atmosphere, and vacuum degree・Time・Surface roughnessさなどのパラメータと継手performanceとのrelativeをpreparedに tuneべ开めており, The next year's からの本片実験に备えている.対肖には,LiやMgなどのActive metal をcontaining non- It is often difficult to make solid phase bonding and the IN905XL is suitable for selection. Tissue inspection of the table on the right The following points are summarized in the results. (1) Temperature 573~673K (= about 0.67Tm , Tm (the absolute temperature of the melting point), pressure 30~40MPa, 6~9 times of pressure, large pressure The processing efficiency is 60~70%. The processing distortion is about 1% and the processing speed is small. (2) The extension of the hand The nature of the base material is the same as the base material. The solid phase bonding method is the same as the original one. .(3) The surface roughness is not affected by the hand strength. (4) The outer peripheral part of the sample is removed and folded back. The position is close to the central axis, the joint is good, and the joint is achieved. (5) The shape of the joint interface is goodのAcidification film もみられない. The effect of the acidification film is reversed.