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WO2018001097A1 - Acier inoxydable de sorbite - Google Patents

Acier inoxydable de sorbite Download PDF

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Publication number
WO2018001097A1
WO2018001097A1 PCT/CN2017/088256 CN2017088256W WO2018001097A1 WO 2018001097 A1 WO2018001097 A1 WO 2018001097A1 CN 2017088256 W CN2017088256 W CN 2017088256W WO 2018001097 A1 WO2018001097 A1 WO 2018001097A1
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WO
WIPO (PCT)
Prior art keywords
stainless steel
sorbite
less
steel
content
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2017/088256
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English (en)
Chinese (zh)
Inventor
董书通
王平
董铖喆
董铖昊
张伯成
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhengzhou Yongtong Special Steel Co
Original Assignee
Zhengzhou Yongtong Special Steel Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhengzhou Yongtong Special Steel Co filed Critical Zhengzhou Yongtong Special Steel Co
Publication of WO2018001097A1 publication Critical patent/WO2018001097A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel

Definitions

  • the invention relates to the technical field of stainless steel, in particular to a soxite stainless steel.
  • Existing stainless steel varieties include austenitic stainless steel, ferritic stainless steel, martensitic stainless steel, duplex stainless steel, and 200 series stainless steel.
  • Ferritic and austenitic stainless steels in these stainless steels are generally used only for the manufacture of vessels and panels due to their low strength. When used as a structural material, since the strength is low, the amount can be increased, and the cost is greatly increased.
  • Duplex stainless steel has good comprehensive performance, but the heat treatment process is difficult and costly, which is 2-3 times that of austenitic stainless steel, which limits its application.
  • the 200 series stainless steel is widely used due to its low price, but due to its low strength, the comprehensive mechanical properties cannot meet the requirements of becoming a structural material. Martensitic stainless steel cannot be used as structural steel due to its structural properties.
  • the technical problem to be solved by the present invention is to provide a Sorbite stainless steel whose main component is a Cr content of 8-15%, a Ni content of 1-5%, a P content of 0.03-1%, and a balance of Fe.
  • the C content is less than 0.1%
  • the S content is less than 0.04%
  • the O content is less than 30 ppm.
  • the stainless steel After the stainless steel is smelted by electric furnace and converter, it should be refined by AOD smelting and ladle furnace (LF), decarburizing, deoxidizing and desulfurizing the molten steel, and the steel is tempered and heat-treated.
  • LF AOD smelting and ladle furnace
  • the mechanical properties of the stellite stainless steel range are: breaking strength > 750 MPa, yield strength > 500 MPa, and elongation not less than 14%. And wherein the grain size of the stellite is controlled to be above 8 grades.
  • the stellite stainless steel of the invention has the characteristics of high strength, corrosion resistance and easy welding, overcomes the problem of low strength of austenitic stainless steel and ferritic stainless steel; overcomes the problem of corrosion of ordinary structural steel; overcomes duplex stainless steel
  • the high cost problem is a structural steel with good processing properties.
  • Figure 1 is a metallographic structure of a Soxhlet stainless steel of the present invention.
  • the present invention provides a sorbite stainless steel in view of the problems of low strength and high cost when the conventional stainless steel is used as a structural steel.
  • the smelting process of the stellite stainless steel is similar to the conventional steelmaking.
  • the molten iron is smelted through an electric furnace and a converter, and then subjected to tapping and alloying, and then subjected to AOD decarburization refining to adjust the alloy composition, followed by LF refining and deoxidation.
  • the temperature and composition of the molten steel are adjusted, and continuous casting into slab, round billet, billet, etc., and then rolling into sheet metal, etc., and finally tempering heat treatment to obtain a Sorbite stainless steel.
  • the main component of the Sorbite stainless steel is controlled by a Cr content of 8-15%, a Ni content of 1-5%, a P content of 0.03-1%, and a balance of Fe.
  • the C content is less than 0.1%
  • the S content is less than 0.04%
  • the O content is less than 30 ppm.
  • the mechanical properties of the prepared stellite stainless steel range are: breaking strength > 750 MPa, yield strength > 500 MPa, and elongation not less than 14%. And wherein the grain size of the stellite is controlled to be above 8 grades.
  • the metallographic structure of the Soxhlet stainless steel produced in the test is shown in Fig. 1. It can be seen that the metallographic structure is a sorbite and the grain size is 9 grade.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Heat Treatment Of Steel (AREA)

Abstract

L'invention concerne un acier inoxydable de sorbite, l'ingrédient principal étant du fer, les éléments d'alliage principaux étant de 8 à 16 % de chrome et de 1 à 5 % de nickel, et contenant également 0,01 à 0,1 % de phosphore, le carbone étant régulé pour être inférieur à 0,1 %, le soufre pour être inférieur à 0,04 %, et la teneur en oxygène pour être inférieure à 30 ppm. Le présent acier inoxydable de sorbite, après fusion dans un four électrique et un convertisseur, subit une fusion AOD et un affinage en four de poche (LF), puis une décarburation, une désoxydation et une désulfuration de l'acier fondu ; les propriétés mécaniques de l'acier inoxydable de sorbite sont contrôlées au moyen d'un traitement thermique afin d'obtenir les performances idéales dans une large plage ; l'acier inoxydable résout le problème lié à la faible résistance de l'acier inoxydable austénitique et de l'acier inoxydable ferritique, le problème lié à la corrosion de l'acier structural ordinaire, et le problème lié au coût élevé de l'acier inoxydable duplex, et est un acier structural ayant d'excellentes propriétés de transformation.
PCT/CN2017/088256 2016-06-30 2017-06-14 Acier inoxydable de sorbite Ceased WO2018001097A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201610504342.6 2016-06-30
CN201610504342.6A CN107557697B (zh) 2016-06-30 2016-06-30 一种索氏体不锈钢

Publications (1)

Publication Number Publication Date
WO2018001097A1 true WO2018001097A1 (fr) 2018-01-04

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PCT/CN2017/088256 Ceased WO2018001097A1 (fr) 2016-06-30 2017-06-14 Acier inoxydable de sorbite

Country Status (2)

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CN (1) CN107557697B (fr)
WO (1) WO2018001097A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109321836A (zh) * 2018-12-06 2019-02-12 江苏合众不锈钢有限公司 一种节镍低碳新型奥氏体不锈钢带及其制备方法
CN111663071A (zh) * 2020-06-17 2020-09-15 中冶东方工程技术有限公司 经济的铬锰系不锈钢冶炼生产方法及其系统

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* Cited by examiner, † Cited by third party
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CN110408854B (zh) * 2019-08-14 2020-10-20 王平 一种贝氏体不锈钢及其制备方法
CN110512143A (zh) * 2019-09-09 2019-11-29 王平 一种抗震耐火高强韧不锈结构钢及其制备方法
CN113122782B (zh) * 2021-04-21 2022-03-15 浙江中煤机械科技有限公司 一种泵头体用不锈钢及其制备方法
CN114774808A (zh) * 2022-05-06 2022-07-22 温州理工学院 一种低成本耐磨不锈钢
CN114932146B (zh) * 2022-06-30 2024-09-10 浙江青山钢铁有限公司 一种超级双相不锈钢线材的轧制方法
CN115354242B (zh) * 2022-08-02 2023-04-21 杰森能源技术有限公司 不锈钢连续油管及其制备方法
CN116516267B (zh) * 2023-03-21 2024-03-29 王平 经过固溶和纳米强化的索氏体高强不锈结构钢及制备方法

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CN103014549B (zh) * 2012-12-26 2015-11-18 振石集团东方特钢股份有限公司 一种高性能双相不锈钢及其加工方法
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US20100319647A1 (en) * 2007-11-30 2010-12-23 Nippon Piston Ring Co., Ltd. Combination structure of piston ring and cylinder liner for internal combustion engine
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109321836A (zh) * 2018-12-06 2019-02-12 江苏合众不锈钢有限公司 一种节镍低碳新型奥氏体不锈钢带及其制备方法
CN111663071A (zh) * 2020-06-17 2020-09-15 中冶东方工程技术有限公司 经济的铬锰系不锈钢冶炼生产方法及其系统

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CN107557697B (zh) 2019-04-02
CN107557697A (zh) 2018-01-09

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