Title:
PROCESS FOR SMELTING STEEL FOR ULTRAFINE CARBORUNDUM WIRE
Document Type and Number:
WIPO Patent Application WO/2021/223660
Kind Code:
A1
Abstract:
A process for smelting steel for an ultrafine carborundum wire, comprising: 1) in a vacuum induction furnace, using pure iron and low-phosphorus pig iron as raw materials to be melted into molten steel under the protection of argon; vacuumizing and smelting, and degassing for 15-20 min under 300 Pa; using high-purity silicon iron as a deoxidizer to adjust components of the molten steel; and casting a circular ingot in vacuum; 2) cleaning the surface of the circular ingot to manufacture an electrode bar for electroslag smelting; 3) using the electrode bar as a raw material for remelting and smelting in an electroslag furnace, electroslag protecting slag comprising: CaF2: 45-55%, Al2O3: 15-25%, SiO2: 20-25%, Na2O: 2-4%, and K2O: 1-2%; and smelting the electrode bar in the electroslag furnace into a cylindrical electroslag ingot, the diameter of the electroslag ingot being 0.4-0.5 m; 4) forging the electroslag ingot as a square billet for wire rolling; and 5) rolling the forged billet as a steel wire rod having the diameter of 4.5-5.5 mm, the steel wire rod comprising [C]: 0.92-1.1%, [Si]: 0.3-0.4%, [Mn]: 0.5-0.8%, [Al]<0.0008%, [N]<0.005%, [S]<0.01%, and [P]<0.015%.
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Inventors:
XU YINGTIE (CN)
HUANG ZONGZE (CN)
LIU XIANGJIANG (CN)
WAN GENJIE (CN)
QI YANFENG (CN)
HUANG ZONGZE (CN)
LIU XIANGJIANG (CN)
WAN GENJIE (CN)
QI YANFENG (CN)
Application Number:
PCT/CN2021/091085
Publication Date:
November 11, 2021
Filing Date:
April 29, 2021
Export Citation:
Assignee:
BAOSHAN IRON & STEEL (CN)
International Classes:
C22C33/04; C21C5/52; C21C7/06; C21C7/10; C21D8/06; C22B9/18; C22C38/02; C22C38/04
Foreign References:
| CN112011742A | 2020-12-01 | |||
| CN110230008A | 2019-09-13 | |||
| CN102492894A | 2012-06-13 | |||
| CN108866433A | 2018-11-23 | |||
| CN109706385A | 2019-05-03 |
Other References:
See also references of EP 4119687A4
Attorney, Agent or Firm:
WATSON & BAND INTELLECTUAL PROPERTY AGENT LTD. (CN)
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