METHOD FOR JOINTING FRICTION AGITATION POINT

• Main Authors: TAIYAMA MASANORI, NISHIHATA HITOMI
• Format: Patent
• Language: English; Japanese
• Published: 16.02.2015
• Subjects: CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; PERFORMING OPERATIONS; SOLDERING OR UNSOLDERING; TRANSPORTING; WELDING; WORKING BY LASER BEAM

PROBLEM TO BE SOLVED: To provide a method for jointing friction agitation points that can obtain a sufficient joint strength even when jointing a metallic material of high temperature strength.SOLUTION: In a preliminary process, a first member 1 and a second member 2 are overlapped above and below so that soft layers 1b, 2b are located at a boundary between the first member 1 and the second member 2. The first member 1 and the second member 2 consist of a metallic material of high temperature strength. The soft layers 1b, 2b each has a lower hardness than mother material hardness of the first member 1 and that of the second member 2 at a room temperature. In a pressing process, a plastic flow part 5 is formed by pressing a pin part 4b against a top face of the first member 1 while a rotary tool 4 is being rotated. In an agitation process, the plastic flow part 5 is enlarged by press-fitting the pin part 4b into the second member 2 while the rotary tool 4 is being rotated, and the plastic flow part 5 is agitated with the pin part 4b. In a stop step, a plastic flow is stopped by drawing the pin part 4b out of the plastic flow part 5. 【課題】高温強度の高い金属材料を接合する場合でも十分な接合強度が得られる摩擦攪拌点接合方法の提供。【解決手段】予備工程では、軟質層１ｂ，２ｂが第１部材１と第２部材２との境界部に位置するように、第１部材１および第２部材２を上下に重ね合わせる。第１部材１および第２部材２は高温強度の高い金属材料からなる。軟質層１ｂ，２ｂは、室温において第１部材１および第２部材２の母材硬度よりも低い硬度を有する。押圧工程では、回転工具４を回転させながらピン部４ｂを第１部材１の上面に押し付けることによって塑性流動部５を形成する。攪拌工程では、回転工具４を回転させながら、ピン部４ｂを第２部材２まで圧入することによって塑性流動部５を拡大させ、ピン部４ｂによって塑性流動部５を攪拌する。停止工程では、ピン部４ｂを塑性流動部５から引き抜いて塑性流動を停止させる。【選択図】 図２