CN102162074A - In-situ cast stainless steel - Google Patents
In-situ cast stainless steel Download PDFInfo
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- CN102162074A CN102162074A CN 201110076862 CN201110076862A CN102162074A CN 102162074 A CN102162074 A CN 102162074A CN 201110076862 CN201110076862 CN 201110076862 CN 201110076862 A CN201110076862 A CN 201110076862A CN 102162074 A CN102162074 A CN 102162074A
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Abstract
The invention relates to an in-situ cast stainless steel which comprises the following components in percentage by weight: 0.01-0.12% of C, 15.00-22.00% of Cr, 5.00-10.00% of Ni, 1.00-2.50% of Mo, at most 5.00% of Mn, 0.02-1.00% of Nb, 0.80-2.00% of Si, at most 0.03% of S, at most 0.06% of P, at least 0.02% of Re, 0.05-0.30% of N and the balance of Fe. The heat-treatment-free in-situ cast stainless steel has the advantages of fine structure, higher yield strength and toughness than traditional similar nickel-chromium stainless steel, acid/alkali corrosion resistance, favorable machinability, favorable weldability, environmental protection and energy saving, has favorable stress corrosion cracking resistance, crevice corrosion resistance, corrosion wear resistance and cavitation corrosion resistance especially in a chloridion-containing medium and a sea water corrosion environment, does not need excellent heat treatment equipment, and lowers the cost by about 20% as compared with the traditional stainless steel.
Description
Technical field
The present invention relates to a kind of stainless steel, especially exempt from thermal treatment original position Cast Stainless Steel.
Background technology
Since invention is that the stainless steel of main added elements is over more than 100 year with chromium or nickel chromium triangle, the existing in the world at present stainless steel that the trade mark is arranged more than hundred kinds, for guaranteeing that these stainless steel products have good use properties, generally all to pass through smelting → casting (casting) → forging (or rolling) → a series of machining processes such as thermal treatment → machining.And smelting → casting (casting) → heat treatment process is essential.Wherein heat treatment process always is as changing casting, forging, rolled parts product internal crystal structure, structural state, and phenomenon or defective such as the crystal grain of retaining in the elimination castingprocesses is thick, crystal boundary is generous, accumulation of impurities and serious component segregation, guarantee the product requisite critical process process that is possessed of good qualities.For this reason, use complete superior Equipment for Heating Processing, a series of cost inputs such as the change expense is artificial, the energy, environmental protection and management.
Summary of the invention
The purpose of this invention is to provide and a kind ofly can remove heat treatment process from, the original position Cast Stainless Steel of good mechanical performance.
Original position Cast Stainless Steel provided by the invention contains following composition: 0.01 ~ 0.12%C by weight percentage, 15.00 ~ 22.00%Cr, 5.00 ~ 10.00%Ni, 1.00 ~ 2.50%Mo, ≤ 5.00%Mn, 0.02 ~ 1.00%Nb, 0.80 ~ 2.00%Si ,≤0.03%S, ≤ 0.06%P, 〉=0.02%Re, 0.05 ~ 0.30%N, surplus Fe.
Each composition preferred content (weight %) is:
0.04 ~ 0.08%C, 19.00 ~ 20.00%Cr, 7.50 ~ 8.80%Ni, 1.80 ~ 2.50%Mo ,≤2.00%Mn, 0.20 ~ 0.80%Nb, 0.80 ~ 1.20%Si ,≤0.03%S ,≤0.05%P, 〉=0.02%Re, 0.10 ~ 0.20%N, surplus is Fe.
The preparation method is as follows:
By original position Cast Stainless Steel component content batching, with these batching baking dehumidifying back meltings in medium-frequency induction furnace or electric furnace, casting after the deoxidation slagging-off.After also can in intermediate frequency furnace, melting basic raw material for the member that special requirement are arranged, pour into and carry out refining, casting then in the AOD stove.Can directly enter later process such as machining after the sand removal, be processed into the component product.
Original position Cast Stainless Steel of the present invention has following characteristic and advantage:
1. original position Cast Stainless Steel of the present invention is different with traditional austenitic stainless steel and conventional duplex stainless steel (~ 50% ferrite), and it contains＜ferrite of 20% phase component, make this material have magnetic.Because not through Overheating Treatment, the final metallographic structure of product also is the original structure that remains in the process of setting.Because this process is that the ferrite austenite hockets until solidifying end, almost be hard to tell phase interface and crystal boundary again, guaranteed the meticulous and unordered of metallographic structure, established organization foundation for product has good physical and chemical performance.
2.Nb element adds as trace element, the fine carbide that they form in the molten steel process of cooling becomes crystallization nuclei, causes the meticulousr of cast product crystal grain, has further improved this product strength, toughness and wear resistance simultaneously.
3.Mo the adding of element mainly is to have guaranteed this material resisting chloride ion penetration seawater corrosion resistance, the ability of anti-spot corrosion.
4. the adding of mixed rare-earth elements is though content is only〉0.02%, the purification crystal boundary that it is good especially, crystal grain thinning and oxidation-resistance can obviously improve the quality of product.
5. compare with traditional nickel Chromium Stainless Steel 304,316 of similar close composition etc., the present invention has more superior mechanical property (seeing Table 1)
Table 1
6. compare with similar traditional nickel road stainless steel, the present invention has meticulousr tissue, superior corrosion resistance energy more, especially anti-spot corrosion, cavitation erosion resistant, anti-stress corrosiveness and anticorrosive abradability are more superior, are suitable for making the moving member in chlor-alkali medium and the ocean environment.
7. compare with similar traditional nickel Chromium Stainless Steel, the present invention has better machinability.
8. compare with similar traditional nickel Chromium Stainless Steel, the present invention has better welding property.
9. because saved heat treatment process, need not superior, expensive complete equipment and the workshop of being heat-treated to, removed the pollution of the long-term heating of pyritous more than 1000 ℃ and soda acid and poisonous element from.Therefore, products production manufacturing of the present invention belongs to green engineering, not only environmental protection, and also energy-conservation, can also reduce investment, make manufacturing cost reduce about 20%, have obvious social and economic benefit.Original position Cast Stainless Steel of the present invention can be widely used in oil, chemical industry (marine chemical industry) shipbuilding, fields such as building, vehicle, papermaking, printing and dyeing, pharmacy, food.
Embodiment
Embodiment 1:
Original position Cast Stainless Steel of the present invention is starting material with the iron alloy of steel scrap (O8F), waste and old nickel chromium stainless steel, micro-niobium, molybdenum etc., its composition (weight %) is: 0.06%C, 19.50%Cr, 7.20%Ni, 1.50%Mo, 1.50%Mn, 0.8%Nb, 1.00%Si, 0.02%S, 0.03%P, 0.05Re, 0.12%N, surplus is Fe.
Mechanical property is listed in table 2.
Embodiment 2:
Original position Cast Stainless Steel composition of the present invention (weight %) is: 0.02%C, 18.2%Cr, 5.82%Ni, 0.08%Mo, 4.7%Mn, 0.40%Nb, 0.80%Si, 0.028%S, 0.04%P, 0.05Re, 0.08%N, surplus is Fe.
Mechanical property is listed in table 2.
Embodiment 3:
Original position Cast Stainless Steel composition of the present invention (weight %) is: 0.10%C, 21.00%Cr, 9.51%Ni, 2.50%Mo, 1.80%Mn, 0.95%Nb, 1.50%Si, 0.01%S, 0.04%P, 0.07Re, 0.22%N, surplus is Fe.
Mechanical property is listed in table 2.
Table 2
Claims (2)
1. an original position Cast Stainless Steel is characterized in that containing by weight percentage following composition: 0.01 ~ 0.12%C, 15.00 ~ 22.00%Cr, 5.00 ~ 10.00%Ni, 1.00 ~ 2.50%Mo ,≤5.00%Mn, 0.02 ~ 1.00%Nb, 0.80 ~ 2.00%Si, ≤ 0.03%S ,≤0.06%P, 〉=0.02%Re, 0.05 ~ 0.30%N, surplus Fe.
2. original position Cast Stainless Steel according to claim 1 is characterized in that containing by weight percentage: 0.04 ~ 0.08%C, 19.00 ~ 20.00%Cr, 7.50 ~ 8.80%Ni, 1.80 ~ 2.50%Mo ,≤2.00%Mn, 0.20 ~ 0.80%Nb, 0.80 ~ 1.20%Si, ≤ 0.03%S ,≤0.05%P, 〉=0.02%Re, 0.10 ~ 0.20%N, surplus is Fe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110076862 CN102162074A (en) | 2011-03-29 | 2011-03-29 | In-situ cast stainless steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110076862 CN102162074A (en) | 2011-03-29 | 2011-03-29 | In-situ cast stainless steel |
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| CN102162074A true CN102162074A (en) | 2011-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201110076862 Pending CN102162074A (en) | 2011-03-29 | 2011-03-29 | In-situ cast stainless steel |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104451451A (en) * | 2015-01-12 | 2015-03-25 | 江苏华久辐条制造有限公司 | Stainless steel used for preparing spokes and application thereof |
| CN104451450A (en) * | 2015-01-12 | 2015-03-25 | 江苏华久辐条制造有限公司 | Stainless steel wire for spoke |
| CN106756625A (en) * | 2016-12-16 | 2017-05-31 | 安徽宝恒新材料科技有限公司 | A kind of high-mechanical property stainless steel plate |
| CN109487174A (en) * | 2018-11-30 | 2019-03-19 | 山西太钢不锈钢股份有限公司 | A kind of two phase stainless steel manufacturing method of plate thereof for taking into account elevated temperature strength and low-temperature flexibility |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5827476A (en) * | 1996-02-26 | 1998-10-27 | Sandvik Ab | Austenitic stainless steel with good oxidation resistance |
| CN101410537A (en) * | 2006-03-31 | 2009-04-15 | 住友金属工业株式会社 | Process for producing seamless two-phase stainless-steel pipe |
| CN101580917A (en) * | 2002-03-25 | 2009-11-18 | 朴庸秀 | High-grade duplex stainless steel |
| CN101784687A (en) * | 2007-10-03 | 2010-07-21 | 住友金属工业株式会社 | Austenitic stainless steel |
-
2011
- 2011-03-29 CN CN 201110076862 patent/CN102162074A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5827476A (en) * | 1996-02-26 | 1998-10-27 | Sandvik Ab | Austenitic stainless steel with good oxidation resistance |
| CN101580917A (en) * | 2002-03-25 | 2009-11-18 | 朴庸秀 | High-grade duplex stainless steel |
| CN101410537A (en) * | 2006-03-31 | 2009-04-15 | 住友金属工业株式会社 | Process for producing seamless two-phase stainless-steel pipe |
| CN101784687A (en) * | 2007-10-03 | 2010-07-21 | 住友金属工业株式会社 | Austenitic stainless steel |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104451451A (en) * | 2015-01-12 | 2015-03-25 | 江苏华久辐条制造有限公司 | Stainless steel used for preparing spokes and application thereof |
| CN104451450A (en) * | 2015-01-12 | 2015-03-25 | 江苏华久辐条制造有限公司 | Stainless steel wire for spoke |
| CN104451450B (en) * | 2015-01-12 | 2015-10-28 | 江苏华久辐条制造有限公司 | A kind of stainless steel wire for spoke use |
| CN104451451B (en) * | 2015-01-12 | 2015-10-28 | 江苏华久辐条制造有限公司 | A kind of stainless steel for the preparation of spoke and application thereof |
| CN106756625A (en) * | 2016-12-16 | 2017-05-31 | 安徽宝恒新材料科技有限公司 | A kind of high-mechanical property stainless steel plate |
| CN109487174A (en) * | 2018-11-30 | 2019-03-19 | 山西太钢不锈钢股份有限公司 | A kind of two phase stainless steel manufacturing method of plate thereof for taking into account elevated temperature strength and low-temperature flexibility |
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Application publication date: 20110824 |