CN102383058A - High-nitrogen low-nickel super two-phase stainless steel - Google Patents
High-nitrogen low-nickel super two-phase stainless steel Download PDFInfo
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- CN102383058A CN102383058A CN2011103357924A CN201110335792A CN102383058A CN 102383058 A CN102383058 A CN 102383058A CN 2011103357924 A CN2011103357924 A CN 2011103357924A CN 201110335792 A CN201110335792 A CN 201110335792A CN 102383058 A CN102383058 A CN 102383058A
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Abstract
The invention provides high-nitrogen low-nickel super two-phase stainless steel, comprising the following components in percentage by weight: 24-26% of Cr, 14-20% of Mn, 2.0-4.0% of Mo, 0.30-0.55% of N, 0.01-0.03% of C, 0.05-0.2% of Ce or Y, 2-3.2% of Ni, less than or equal to 1.0% of Si, less than or equal to 0.01% of S, less than or equal to 0.02% of P, less than or equal to 0.01% of B and the balance of Fe. The high-nitrogen low-nickel super two-phase stainless steel has the characteristics of low manufacturing cost, high strength, high toughness, corrosion resistance and wearing resistance, can be widely applied in equipment of the manufacturing industries such as petroleum, chemical engineering, ship building, papermaking, food, medicines and the like and the fields such as environmental protection, aerospace, urban rail transit and the like, and products such as stainless steel corrosion-resistance alloy plates, pipes, steel wire ropes, casting and forging pieces and the like.
Description
Technical field
The present invention relates to a kind of alloy material, particularly relate to a kind of high nitrogen and low nickel super-duplex stainless steel.
Background technology
Stainless steel has advantageous advantage as a kind of special alloy, and along with development of technology and expanding economy, its range of application has more and more widely now spreaded all over each corner of our life.
Duplex stainless steel has wherein developed into the third generation since being born in the U.S. from the forties in 20th century; Duplex stainless steel (Duplex Stainless Steel is called for short DSS) refers to that ferritic and austenite respectively account for 50%, and the content of generally looking younger need reach 30% stainless steel at least; Its principal feature is that ys can reach 400-550MPa, is 2 times of common stainless steel, therefore can economize on material, reduces the device fabrication cost.Aspect anticorrosive; Particularly media environment is relatively more abominable (like seawater; Chloride ion content is higher) condition under, anti-spot corrosion, crevice corrosion, stress corrosion and the Corrosion Fatigue Properties of duplex stainless steel obviously are superior to common austenitic stainless steel, can match in excellence or beauty with the high alloy austenitic stainless steel.But present duplex stainless steel still comprises precious metal elements such as high-load nickel, aluminium, Cu, all exists manufacturing cost high, the insufficient shortcoming of intensity, toughness, corrosion resistance and wear resisting property, thus influenced the use properties and the scope of application.
Summary of the invention
It is high to the objective of the invention is to solve the duplex stainless steel manufacturing cost, intensity, toughness, acidproof corrosion resistance and the insufficient problem of wear resisting property.
To achieve these goals; The present invention provides a kind of high nitrogen and low nickel super-duplex stainless steel, and this stainless steel is made up of following component in percentage by weight: 24～26%Cr, 14～20%Mn, 2.0～4.0%Mo, 0.30～0.55%N, 0.01～0.03%C, 0.05～0.2%Ce or Y,＜5%Ni ,≤1.0%Si ,≤0.01%S ,≤0.02%P ,≤0.01%B, surplus are Fe.
Each composition preferred weight percent is following: 24.5～25.4%Cr, 16～20%Mn, 2.5～3.6%Mo, 0.38～0.55%N, 0.01～0.02%C, 0.1～0.15%Ce or Y, 2～3.2%Ni ,≤1.0%Si ,≤0.01%S ,≤0.02%P ,≤0.01%B, surplus are Fe.
The invention has the beneficial effects as follows:
(1) have intensity height, good toughness, the big and little advantage of extensibility of rupture pull force is applicable to wireline and the equipment of making the Highrise buildings express elevator.
(2) good anti-pitting performance is arranged, good anti-chloride stress cracking corrosive nature is arranged under the low-stress.
(3) have good resistance to corrosion fatigue and abrasion resistance properties.Under the condition of some corrosive medium, be applicable to power-equipments such as making pump, valve and traction.
(4) low cost of manufacture.
Embodiment
Specify the preferred embodiments of the present invention below.
Present embodiment high nitrogen and low nickel super-duplex stainless steel; Adopt high nitrogen and low nickel to add the latest prescription of thulium; Raw material is mainly stainless steel returns, carbon steel kind waste material, nickel plate, high carbon ferro-chrome, medium carbon ferrochrome etc., and its component in percentage by weight is formed as follows: 24.5～25%Cr, 15～15.8%Mn, 2.8～3.0%Mo, 0.40～0.48%N ,≤0.012%C, 0.12%Ce or Y, 2.3～3.1%Ni ,≤1.0%Si ,≤0.01%S ,≤0.02%P ,≤0.01%B, surplus are Fe.By this composition with starting material batching baking dehumidifying back ingot casting after the melting in medium-frequency induction furnace or electric arc furnace; Utilization AOD refining furnace adopts the argon oxygen decarburization refining technology, protects the purpose of chromium through the dividing potential drop that adopts adjusting gas supplied kind and tolerance to reduce CO to realize carbon drop.
The beneficial effect of present embodiment is can be widely used in fields such as production such as oil, chemical industry, shipbuilding, papermaking, food, medicine and environmental protection, space flight, urban track traffic with equipment, and products such as stainless steel non-corrosive metal plate, pipe, wireline, forge piece.
Claims (2)
1. high nitrogen and low nickel super-duplex stainless steel is characterized in that this stainless steel is made up of following component in percentage by weight: 24～26%Cr, 14～20%Mn, 2.0～4.0%Mo, 0.30～0.55%N, 0.01～0.03%C, 0.05～0.2%Ce or Y,＜5%Ni ,≤1.0%Si ,≤0.01%S ,≤0.02%P ,≤0.01%B, surplus are Fe.
2. high nitrogen and low nickel super-duplex stainless steel according to claim 1 is characterized in that each composition weight percent is following: 24.5～25.4%Cr, 16～20%Mn, 2.5～3.6%Mo, 0.38～0.55%N, 0.01～0.02%C, 0.1～0.15%Ce or Y, 2～3.2%Ni ,≤1.0%Si ,≤0.01%S ,≤0.02%P ,≤0.01%B, surplus are Fe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103357924A CN102383058A (en) | 2011-10-31 | 2011-10-31 | High-nitrogen low-nickel super two-phase stainless steel |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011103357924A CN102383058A (en) | 2011-10-31 | 2011-10-31 | High-nitrogen low-nickel super two-phase stainless steel |
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| CN102383058A true CN102383058A (en) | 2012-03-21 |
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| CN2011103357924A Pending CN102383058A (en) | 2011-10-31 | 2011-10-31 | High-nitrogen low-nickel super two-phase stainless steel |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103643144A (en) * | 2013-01-12 | 2014-03-19 | 上海大学 | Nickel-saving type super duplex stainless steel and preparation method thereof |
| CN105436699A (en) * | 2015-12-25 | 2016-03-30 | 江苏烁石焊接科技有限公司 | High-nitrogen steel stirring head for friction stir welding and manufacturing process thereof |
| CN106756604A (en) * | 2016-11-16 | 2017-05-31 | 重庆大学 | Nonstandard stainless steel of a kind of improved corrosion based on PSO SVR and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1970815A (en) * | 2006-07-21 | 2007-05-30 | 上海大学 | Rare earth-containing high-nitrogen ultralow-nickel super-duplex stainless steel alloy materials and method for preparing same |
-
2011
- 2011-10-31 CN CN2011103357924A patent/CN102383058A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1970815A (en) * | 2006-07-21 | 2007-05-30 | 上海大学 | Rare earth-containing high-nitrogen ultralow-nickel super-duplex stainless steel alloy materials and method for preparing same |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103643144A (en) * | 2013-01-12 | 2014-03-19 | 上海大学 | Nickel-saving type super duplex stainless steel and preparation method thereof |
| CN105436699A (en) * | 2015-12-25 | 2016-03-30 | 江苏烁石焊接科技有限公司 | High-nitrogen steel stirring head for friction stir welding and manufacturing process thereof |
| CN105436699B (en) * | 2015-12-25 | 2018-10-12 | 江苏烁石焊接科技有限公司 | A kind of the high nitrogen steel stirring-head and its manufacturing process of agitating friction weldering |
| CN106756604A (en) * | 2016-11-16 | 2017-05-31 | 重庆大学 | Nonstandard stainless steel of a kind of improved corrosion based on PSO SVR and preparation method thereof |
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Application publication date: 20120321 |