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1. (WO2017166962) MELTING PROCESS FOR NICKEL-BASED ALLOY CONTAINING ALUMINUM, TITANIUM, BORON, AND ZIRCONIUM

Pub. No.:    WO/2017/166962    International Application No.:    PCT/CN2017/074564
Publication Date: Fri Oct 06 01:59:59 CEST 2017 International Filing Date: Fri Feb 24 00:59:59 CET 2017
IPC: C22C 19/03
C22C 1/02
Applicants: SHANDONG ROITIE NEW MATERIAL SCIENCE AND TECHNOLOGY CO., LTD.
山东瑞泰新材料科技有限公司
Inventors: LI, Daoqian
李道乾
LIU, Yuting
刘玉庭
GUO, Jianting
郭建亭
LIU, Yun
刘云
WANG, Guanghua
王光华
Title: MELTING PROCESS FOR NICKEL-BASED ALLOY CONTAINING ALUMINUM, TITANIUM, BORON, AND ZIRCONIUM
Abstract:
Disclosed is a melting process for a nickel-based alloy containing aluminum, titanium, boron, and zirconium, comprising: adding graphite accounting for 50% of a total carbon-containing mass of an alloy into a crucible of a vacuum furnace and placing the graphite at the bottommost portion of the crucible, and adding all elements, except for aluminum, titanium, boron, zirconium, and nickel, in the alloy into the crucible of the vacuum furnace to be molten; raising the temperature, adding the remaining graphite into the crucible, and carrying out refining and then cooling; adding calcium metal into the crucible, and after the calcium metal is completely molten, carrying out refining and then cooling; adding aluminum and titanium into the crucible, and raising the temperature until the aluminum and the titanium are completely molten; adding a nickel-boron alloy and zirconium into the crucible, and raising the temperature until the nickel-boron alloy and the zirconium are completely molten; and cooling the molten metal, filtering, and carrying out tapping and pouring. The process method reduces the content of harmful gas and low-melting-point harmful impurities in an alloy, and achieves the purposes of purifying an alloy melt, reducing segregation of alloy elements, and ensuring alloy performance.