CN101429629A - Biphase stainless steel - Google Patents
Biphase stainless steel Download PDFInfo
- Publication number
- CN101429629A CN101429629A CNA2007101620497A CN200710162049A CN101429629A CN 101429629 A CN101429629 A CN 101429629A CN A2007101620497 A CNA2007101620497 A CN A2007101620497A CN 200710162049 A CN200710162049 A CN 200710162049A CN 101429629 A CN101429629 A CN 101429629A
- Authority
- CN
- China
- Prior art keywords
- percent
- stainless steel
- corrosion resistance
- resistance
- duplex stainless
- 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.)
- Pending
Links
Landscapes
- Heat Treatment Of Steel (AREA)
Abstract
The invention relates to a two phase stainless steel, which comprises the following chemical components in weight percent: 0 to 0.12 percent of C, 4.0 to 8.0 percent of Mn, 12.0 to 25.0 percent of Cr, 0.20 to 1.5 percent of Al, 0.5 to 3.0 percent of Ni, 0.4 to 3.0 percent of Mo, 0 to 1.0 percent of Cu, 0.2 to 2.5 percent of Si, 0.05 to 0.3 percent of N, 0.02 to 0.05 percent of Re, less than or equal to 0.03 percent of S, less than or equal to 0.035 percent of P, and the balance being Fe. The two phase stainless steel has the advantages of high strength, good toughness, excellent wear resistance and corrosion resistance, in particular the superiorities of stress corrosion cracking resistance, complete corrosion resistance, intergranular corrosion resistance, and pitting corrosion resistance and vacuole corrosion resistance in sea water in solutions such as strong base (such as NaOH), chlor-alkali (NH4Cl), oxidizing acid (such as HNO3), sodium thiocyanate, phosphate solution, good hot and cold processability, and low cost.
Description
Technical field
The present invention relates to a kind of stainless steel.
Background technology
In decades, domestic and international most popular stainless steel is a nickel chromium stainless steel, and wherein the consumption maximum is austenilic Ni-Cr stainless steel.Since finding and use duplex stainless steel the thirties in 20th century,, begun to obtain the attention of scientific and technological circle and industry member and accelerated development in the eighties with its good anti-pitting and stress corrosion crack performance.So far become and one of ferrite, Austenitic stainless steel three major types stainless steel arranged side by side.China's duplex stainless steel that begun one's study since the seventies in 20th century, existing so far and external corresponding several trades mark are for road has been opened up in the development and the application of China's duplex stainless steel.But these duplex stainless steels all are nickel chromium stainless steels.Because the ground ore reserve of nickel and chromium element are relative less, produce the cost costliness.For this reason, scientific and technical personnel according to the similarity of nickel, aluminium and chromium pantogen minor structure and physicals, for nickel, made some iron, manganese, aluminium alloy and iron-manganese-aluminium-chromium austenite stainless steel for chromium with manganese with aluminium.But these iron-manganese-aluminium-chromium austenite stainless steel all have acid resistance poor, the shortcoming of the thick and column crystal prosperity of crystal grain, and influenced their use properties and range of application.
Summary of the invention
The purpose of this invention is to provide a kind of excellent performance is the duplex stainless steel of main added elements with manganese, chromium, aluminium.
Duplex stainless steel provided by the invention, its chemical ingredients and each component content (weight %) are as follows: 0-0.12%C, 4.0-8.0%Mn, 12.0-25.0%Cr, 0.20-1.5%Al, 0.5-3.0%Ni, 0.4-3.0%Mo, 0-1.0%Cu, 0.2-2.5%Si, 0.05-0.3%N, 0.02-0.05%Re ,≤0.03%S ,≤0.035P, surplus Fe.
Each composition preferred content (weight %) is:
0-0.06%C, 5.0-8.0%Mn, 16.0-22.0%Cr, 0.2-1.2%Al, 1.0-3.0%Ni, 0.4-2.0%Mo, 0-1.0%Cu, 0.8-1.0%Si, 0.05-0.2%N, 0.02-0.04%Re ,≤0.03%S ,≤0.035%P, surplus Fe.
Duplex stainless steel of the present invention has the following advantages:
1, has stronger acid-alkali-corrosive-resisting performance.Especially at highly basic (as NaOH), chlor-alkali (NH
4Cl), oxidizing acid is (as HNO
3), stress corrosion dehiscence resistant, anti-general corrosion, intergranular corrosion resistance and anti-spot corrosion, cavitation corrosion in seawater in the solution such as Sodium Thiocyanate 99 and phosphoric acid salt have obvious superiority;
2, intensity height, good toughness, anti-corrosion wear are excellent.Yield strength σ s doubles above greater than 450Mpa than austenitic stainless steel Ocr 18Ni9 commonly used (304), 00Cr17Ni 12Mo2Ti (316L).Simultaneously, also higher than 00Cr18-Mo type and 00Cr22-Mo type nickel chromium triangle duplex stainless steel.Breakdown point (σ b) is greater than 800Mpa, and is for 1.5 times of chromium-nickel austenitic stainless steel 304 commonly used, 316L, also high more than 20% than 00Cr18-Mo type and 00Cr22-Mo type nickel chromium triangle duplex stainless steel.Impact tough (the ak) 〉=120J that remembers, all higher more than 20% than above-mentioned nickel chromium stainless steel.Unit elongation (δ
5) 〉=25% is suitable with 00Cr22-Mo type nickel chromium triangle duplex stainless steel.Good comprehensive mechanical property and solidity to corrosion make duplex stainless steel of the present invention more much higher than the anti-corrosion wear ability of nickel chromium triangle duplex stainless steel.In using, petrochemical complex, salt chemical engineering and phosphorous chemical industry field more show its superiority.
3, the component prescription of uniqueness of the present invention and suitable processing make it at room temperature have the ratio that ferrite and austenite respectively account for 35-65% mutually, and crystal grain is tiny, the nonmetallic impurity rareness, and the tissue that crystal boundary purifies has guaranteed above-mentioned high-performance.
4, the stainless starting material of melting the present invention adopt ordinary scrap steel, industrial electrolysis manganese, and the aluminium scrap cable, humble carbon ferrochrome, the source is sufficient, and is cheap, and cost reduces 20-50% than 18-8 nickel chromium stainless steel and 00Cr22-Mo type duplex stainless steel.
Embodiment
Embodiment:
Duplex stainless steel of the present invention is starting material with steel scrap (08F), industrial electrolysis manganese, nitrided ferro-chromium, molybdenum-iron, aluminium scrap cable and useless nickel chromium stainless steel.Its composition (weight %) is≤0.04%C, 5.0-8.0%Mn, 20.0-22.0%Cr, 0.6-1.2Al, 1.5%Ni, 0.8-1.5%Mo, 0.8-1.0%Cu, 0.8-1.0%Si, 0.05-0.1%N, 0.02%Re ,≤0.03%S ,≤0.035%P, all the other are Fe.By this composition with starting material and material for roasting dehumidifying back ingot casting after the melting in medium-frequency induction furnace or electric arc furnace.Quality product requires can carry out AOD refining or esr when high.Solid solubility temperature is 980-1080 ℃, in good time insulation back air cooling or water-cooled.Duplex stainless steel of the present invention can be cast or rolling becoming a useful person as required, or forges into base in 1150 ℃ of-850 ℃ of temperature ranges.Then through being machined into part.
Ferrite austenite duplex stainless steel of the present invention can be widely used in fields such as oil, chemical industry, shipbuilding, building, vehicle, papermaking, printing and dyeing, pharmacy, food, people's livelihood apparatus.
Claims (2)
1, a kind of duplex stainless steel is characterized in that its chemical ingredients and each component content (weight %) are as follows: 0-0.12%C, 4.0-8.0%Mn, 12.0-25.0%Cr, 0.20-1.5%Al, 0.5-3.0%Ni, 0.4-3.0%Mo, 0-1.0%Cu, 0.2-2.5%Si, 0.05-0.3%N, 0.02-0.05%Re ,≤0.03%S ,≤0.035P, surplus Fe.
2,, it is characterized in that each component content (weight %) is by the described duplex stainless steel of claim 1: 0-0.06%C, 5.0-8.0%Mn, 16.0-22.0%Cr, 0.2-1.2%Al, 1.0-3.0%Ni, 0.4-2.0%Mo, 0-1.0%Cu, 0.8-1.0%Si, 0.05-0.2%N, 0.02-0.04%Re ,≤0.03%S ,≤0.035%P, surplus Fe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101620497A CN101429629A (en) | 2007-11-10 | 2007-11-10 | Biphase stainless steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101620497A CN101429629A (en) | 2007-11-10 | 2007-11-10 | Biphase stainless steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101429629A true CN101429629A (en) | 2009-05-13 |
Family
ID=40645264
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101620497A Pending CN101429629A (en) | 2007-11-10 | 2007-11-10 | Biphase stainless steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101429629A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102454688A (en) * | 2010-10-20 | 2012-05-16 | 新日兴股份有限公司 | Hinge device and electronic device comprising same |
| CN102660663A (en) * | 2012-05-29 | 2012-09-12 | 天津市东瑞钢铁铸造有限公司 | Method for smelting super third-generation double-phase stainless steel by using intermediate frequency furnace |
| CN103498355A (en) * | 2013-10-14 | 2014-01-08 | 无锡通用钢绳有限公司 | Corrosion-resistant steel wire rope |
| CN104411850A (en) * | 2012-06-22 | 2015-03-11 | 新日铁住金株式会社 | Duplex stainless steel |
| CN105463340A (en) * | 2015-11-25 | 2016-04-06 | 铜陵市经纬流体科技有限公司 | High-toughness high-manganese low-nickel stainless steel pump valve casting and manufacturing method thereof |
| CN107829029A (en) * | 2017-11-10 | 2018-03-23 | 洛阳双瑞特种装备有限公司 | A kind of ZG022Cr22Ni5Mo3N materials two phase stainless steel smelting process method |
| CN109487172A (en) * | 2019-01-14 | 2019-03-19 | 东北大学 | One kind having excellent thermoplastic two phase stainless steel and preparation method thereof |
-
2007
- 2007-11-10 CN CNA2007101620497A patent/CN101429629A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102454688A (en) * | 2010-10-20 | 2012-05-16 | 新日兴股份有限公司 | Hinge device and electronic device comprising same |
| CN102660663A (en) * | 2012-05-29 | 2012-09-12 | 天津市东瑞钢铁铸造有限公司 | Method for smelting super third-generation double-phase stainless steel by using intermediate frequency furnace |
| CN104411850A (en) * | 2012-06-22 | 2015-03-11 | 新日铁住金株式会社 | Duplex stainless steel |
| US10202675B2 (en) | 2012-06-22 | 2019-02-12 | Nippon Steel & Sumitomo Metal Corporation | Duplex stainless steel |
| CN103498355A (en) * | 2013-10-14 | 2014-01-08 | 无锡通用钢绳有限公司 | Corrosion-resistant steel wire rope |
| CN103498355B (en) * | 2013-10-14 | 2015-12-09 | 无锡通用钢绳有限公司 | A kind of corrosion-resistant steel wire rope |
| CN105463340A (en) * | 2015-11-25 | 2016-04-06 | 铜陵市经纬流体科技有限公司 | High-toughness high-manganese low-nickel stainless steel pump valve casting and manufacturing method thereof |
| CN107829029A (en) * | 2017-11-10 | 2018-03-23 | 洛阳双瑞特种装备有限公司 | A kind of ZG022Cr22Ni5Mo3N materials two phase stainless steel smelting process method |
| CN109487172A (en) * | 2019-01-14 | 2019-03-19 | 东北大学 | One kind having excellent thermoplastic two phase stainless steel and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101429629A (en) | Biphase stainless steel | |
| CN100482843C (en) | High performance corrosion-proof rare earth super strength dual-phase stainless steel and its smelting tech. | |
| CN102021500B (en) | Novel super austenite 6Mo type stainless steel | |
| CN105385939A (en) | Manufacturing method of high-strength high-tenacity alloy steel | |
| CN102719767B (en) | Economic duplex stainless steel with excellent cold forging performance and manufacturing method thereof | |
| CN101497966A (en) | High-hardness hypereutectic high chromium, manganese, molybdenum and tungsten alloy wear resistant steel material and use thereof | |
| CN107937835A (en) | A kind of corrosion resistant diphase stainless steel alloy material and its manufacturing process | |
| CN104152808A (en) | Boron-containing high-silicon bainite wear-resistant corrosion-resistant alloy and manufacturing method thereof | |
| CN104152818A (en) | Duplex stainless steel and preparation method thereof | |
| CN107012407A (en) | A kind of corrosion resistant two phase stainless steel and preparation method thereof | |
| CN103540864A (en) | Corrosion-resistant stainless steel coffee pot material and preparation method thereof | |
| CN102021496A (en) | Duplex stainless steel and production process thereof | |
| CN110423938A (en) | TMCP type surrenders 500MPa level structure steel plate and its production method | |
| CN101397637B (en) | 13Cr high anti-carbon dioxide and trace hydrogen sulfide corrosion tubing and casing steel and method for producing the same | |
| CN107541662A (en) | A kind of corrosion resistant ferritic stainless steel alloy material and preparation method thereof | |
| CN105543647A (en) | High-strength special steel alloy and preparation process thereof | |
| CN107747050A (en) | A kind of ferritic stainless steel alloy material and preparation method thereof | |
| CN103173696A (en) | Stainless steel hot-rolled steel plate | |
| CN102002646A (en) | Economic biphase stainless steel with high mechanical property and superior corrosion resistance | |
| CN1187467C (en) | Two-phase stainless steel | |
| CN108677110A (en) | A kind of economy type austenitic stainless steel and its manufacturing method | |
| CN101693982B (en) | Martensite corrosion-resisting steel plate for cutting tool and manufacture method thereof | |
| CN101144137A (en) | Steel for niobium-containing high-strength corrosion-resistant steel bar and rolling technique thereof | |
| CN1128246C (en) | Austenic stainless steel | |
| CN101407895A (en) | Wear-resistant corrosion-resistant high-nitrogen high-manganese austenitic stainless steel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090513 |