METHOD FOR MANUFACTURING INGOT MADE OF TITANIUM OR TITANIUM ALLOY

• Main Authors: OYAMA HIDETO, UKITA SHUSUKE, NAKAOKA TAKEHIRO, YASHIKI TAKASHI, TAMURA HIDEMI, WAKAMOTO RIKU, NAKAJIMA YASUHIRO, YOKOYAMA HIROSHI, KANEHASHI HIDEKATSU
• Format: Patent
• Language: English; Japanese
• Published: 07.04.2016
• Subjects: CASTING; CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; PERFORMING OPERATIONS; POWDER METALLURGY; PRETREATMENT OF RAW MATERIALS; PRODUCTION AND REFINING OF METALS; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS

PROBLEM TO BE SOLVED: To enable manufacturing of an ingot having excellent casting surface.SOLUTION: A method for manufacturing an ingot 10 made of titanium or titanium alloy comprises the steps of: generating arc discharge between a consumable electrode 3 disposed in a mold 2, and the mold 2 to melt a melting raw material 11 (the consumable electrode 3 and a charging raw material 7) and drop as a droplet 13, while supplying the charging raw material 7 into the mold 2 having a round cross section; and solidifying a molten metal pool 12 formed of the collected droplets 13. For this method, the charging raw material 7 having the concentration of Cl of 0.014% or more is used with the consumable electrode 3 as the melting raw material 11.SELECTED DRAWING: Figure 2 【課題】鋳肌の状態が良好な鋳塊を製造することができるようにする。【解決手段】チャージ原料７を断面円形の鋳型２内に供給しながら、鋳型２内に配置した消耗電極３と鋳型２との間にアーク放電を発生させて、溶解原料１１（消耗電極３およびチャージ原料７）を溶解させて溶滴１３として滴下させ、溶滴１３が集まってなる溶湯プール１２を凝固させることで、チタンまたはチタン合金からなる鋳塊１０を製造する。このとき、Ｃｌ濃度が０．０１４％以上であるチャージ原料７を消耗電極３とともに溶解原料１１として使用する。【選択図】図２