The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 05, 2022
Filed:
Feb. 23, 2018
Kobe Steel, Ltd., Kobe, JP;
Fumiaki Kudo, Hyogo, JP;
Daisuke Matsuwaka, Hyogo, JP;
Hitoshi Ishida, Hyogo, JP;
Tetsushi Deura, Hyogo, JP;
KOBE STEEL, LTD., Kobe, JP;
Abstract
A method includes the production of a primary ingot, the production of a secondary ingot, and the removal of a flux layer. A CaO—CaFflux in a content of 3-20 mass % and obtained by mixing 35-95 mass % of CaFwith CaO is added to a Ti—Al alloy material including a total of at least 0.1 mass % of oxygen and at least 40 mass % of Al, and the resultant substance is melted by a melting method using a water-cooled copper container in an atmosphere having a pressure of 1.33 Pa or higher and held to produce the primary ingot. The primary ingot is continuously drawn downwards while being melted by a melting method using a bottomless water-cooled copper casting mould in an atmosphere having a pressure of 1.33 Pa or higher to produce the secondary ingot. The flux layer deposited on the surface of the secondary ingot is mechanically removed.