Title:
LARGE-SIZE HIGH-NIOBIUM AND HIGH-TEMPERATURE 706 ALLOY INGOT AND SMELTING PROCESS THEREOF
Document Type and Number:
WIPO Patent Application WO/2021/036226
Kind Code:
A1
Abstract:
Provided are a large-size high-niobium and high-temperature 706 alloy ingot and a smelting process thereof, wherein the smelting process includes: vacuum induction smelting to obtain multiple vacuum induction ingots with the same composition, then the same number of electroslag electrodes are prepared, using (CaF 2-CaO-Al 2O 3-TiO 2) quaternary slag to exchange electroslag remelting, using the obtained electroslag ingot to obtain consumable electrode, then using the consumable electrode as the starting material to perform two vacuum consumable remelting. This process can be used to prepare large-size ingots of high-niobium and high-temperature 706 alloy with an ingot weight of more than 15 tons and a diameter of more than 800 mm, minimizing the formation of black spots and white spots metallurgical defects, and reducing the burning rate of Al and Ti elements.
Inventors:
HUANG SHUO (CN)
ZHAO GUANGPU (CN)
ZHANG BEIJIANG (CN)
DUAN RAN (CN)
QIN HEYONG (CN)
LI LIANPENG (CN)
CHOU YINGYU (CN)
QI CHAO (CN)
ZHAO GUANGPU (CN)
ZHANG BEIJIANG (CN)
DUAN RAN (CN)
QIN HEYONG (CN)
LI LIANPENG (CN)
CHOU YINGYU (CN)
QI CHAO (CN)
Application Number:
PCT/CN2020/078719
Publication Date:
March 04, 2021
Filing Date:
March 11, 2020
Export Citation:
Assignee:
GAONA AERO MAT CO LTD (CN)
FUSHUN SPECIAL STEEL SHARES CO LTD (CN)
FUSHUN SPECIAL STEEL SHARES CO LTD (CN)
International Classes:
C22C19/05; C22B9/18
Domestic Patent References:
| WO2013089218A1 | 2013-06-20 |
Foreign References:
| CN1503850A | 2004-06-09 | |||
| CN1165205A | 1997-11-19 | |||
| CN106676299A | 2017-05-17 | |||
| CN104561664A | 2015-04-29 | |||
| DE102018009375A1 | 2019-06-06 |
Other References:
SCHOLZ, H.; BIEBRICHER, U.; BRUCKMANN, G.; ESSER, D.: "ESR Meets the Requirements for Big Forgings", IRON & STEEL, vol. 48, no. 10, 14 October 2013 (2013-10-14), Germany, pages 82 - 87, XP009526405, DOI: 10.13228/j.boyuan.issn0449-749x.2013.10.015
Attorney, Agent or Firm:
BEIJING WEIZHENG PATENT AGENCY CO., LTD. (CN)
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