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Title:
NICKEL-CONTAINING FERRITIC STAINLESS STEEL SMELTED FROM LATERITE NICKEL ORE, AND PREPARATION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2021/056602
Kind Code:
A1
Abstract:
A nickel-containing ferritic stainless steel smelted from laterite nickel ore, and a preparation method therefor, relating to the field of steel metallurgy. The basic components are: C 0.01-0.07 wt%, Si ≤0.8 wt%, Mn ≤0.8 wt%, Cr 14-26 wt%, Ni ≤1.6 wt%, P ≤0.05 wt%, S ≤0.030 wt%, Al 0.01-0.05 wt%, and total O ≤40 ppm, the remainder being Fe and unavoidable impurities. Based on the chromium-containing characteristics and low-nickel characteristics of the laterite nickel surface layer ore, the present steel uses the effective ingredients of the resource to create a variety of nickel-containing ferritic stainless steels, so that practically discarded laterite nickel surface ore can be used as a resource with value, the composition of the nickel-containing ferritic stainless steel being adjusted according to the requirements for resistance to neutral salt spray corrosion and pitting corrosion, and the processes being selected to meet the functional requirements of a variety of stainless steels, which is conducive to industrial production and use.

Inventors:
WANG PING (CN)
ZHAO YONGPU (CN)
Application Number:
PCT/CN2019/109535
Publication Date:
April 01, 2021
Filing Date:
September 30, 2019
Export Citation:
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Assignee:
WANG PING (CN)
ZHAO YONGPU (CN)
International Classes:
C22C38/06; C21C7/06
Domestic Patent References:
WO2018198834A12018-11-01
Foreign References:
CN102534409A2012-07-04
CN103436797A2013-12-11
JP2019147986A2019-09-05
JP2018154857A2018-10-04
CN101469391A2009-07-01
Attorney, Agent or Firm:
BEIJING GUANGYOU PATENT FIRM CO., LTD (CN)
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