CN101532115A - Non-nickel austenite stainless steel - Google Patents
Non-nickel austenite stainless steel Download PDFInfo
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- CN101532115A CN101532115A CN200910097844A CN200910097844A CN101532115A CN 101532115 A CN101532115 A CN 101532115A CN 200910097844 A CN200910097844 A CN 200910097844A CN 200910097844 A CN200910097844 A CN 200910097844A CN 101532115 A CN101532115 A CN 101532115A
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Abstract
The invention discloses a non-nickel austenite stainless steel containing the elements according to the following weight percentages: 16% to 18% of Cr, 9.0% to 11.0% of Mn, 0.10% to 0.18% of C, 0.15% to 0.3% of N, and remainders including Fe and unavoidable impurities that are Si, P, S and Ni in which the weight percentages are controlled so that the content of Si is less than or equal to 1.0%, the content of P is less than or equal to 0.035%, the content of S is less than or equal to 0.03%, and the content of Ni is less than or equal to 0.30%. The non-nickel stainless steel in the invention contains high manganese and nitrogen elements to completely replace nickel so that the raw material cost of alloy is reduced and simultaneously the corrosion resistance of Ni-containing stainless steel is basically held; and the rigidity is high, the tenacity is good, the anti-penetrating ability is strong, and the non-nickel austenite stainless steel is particularly applied to manufacturing spring, stainless steel innersole, and the like.
Description
Technical field
The present invention relates to a kind of austenitic stainless steel, be specifically related to a kind of not nickel austenite stainless steel.
Background technology
In recent years, be subjected to the stimulation of China, add that the industries such as plating, chemical industry and battery that develop rapidly to the increasing rapidly of former nickel and regeneration nickel demand, make that nickel valency one tunnel is high, therefore cause nickel austenite stainless steel to hold at high price the stainless steel great demand; And because stainless steel is also in medical embedded field application is arranged more, but wherein contain toxic element nickel, in organism, be easy to bring out toxic effect, serious pathology takes place, use toughness to meet the demands.
Therefore, along with worldwide nickel resources anxiety, nickel holds at high price, and medical field makes low nickel of exploitation even nickelles stainless steel become a trend for the special requirement of nickelles stainless steel.
Publication number is that application documents and the publication number of CN101368252A is the application documents of CN101250670A, though also do not contain nickel element, its chromium content is relatively low, is not very desirable thereby make its Corrosion Protection and intensity etc.
Summary of the invention
Technical problem to be solved by this invention is the above-mentioned deficiency at prior art, provides that a kind of to have high strength, high tenacity, erosion resistance good, and cheap not nickel austenite stainless steel.
In order to solve the problems of the technologies described above, technical scheme of the present invention is: a kind of not nickel austenite stainless steel, the element that contains following weight percent: Cr 16%～18%, Mn 9.0%～11.0%, C 0.10%～0.18%, N 0.15%～0.35%, and surplus is Fe and unavoidable impurities.
As preferably, not nickel austenite stainless steel of the present invention, contain the element of following weight percent: Cr 17%～17.5%, and Mn 9.0%～10.0%, and C 0.13%～0.16%, and N 0.16%～0.23%, and surplus is Fe and unavoidable impurities.
Austenitic stainless steel of the present invention, its described unavoidable impurities is Si, P, S, Ni, its weight percent content that allows to use is: Si≤1.0%, P≤0.035%, S≤0.03%, Ni≤0.30%.
Austenitic stainless steel of the present invention is a kind of typical chromium, manganese, nitrogen austenitic stainless steel, and its various main component ratios are selected the reasons are as follows:
1)Cr：16％～18％。The n/8 law that reaches Cr/Fe according to chrome content in the steel is determined.When Cr＜12%, then the stainless steel erosion resistance reduces greatly; When Cr ≈ 18%, be minimum for obtaining the required nickel equivalent of stable austenite.Has erosion resistance preferably simultaneously.Work as Cr〉19%, then the γ district dwindles, and α-Fe district enlarges, and significantly reduces the plasticity and the toughness of steel.In order to obtain more satisfied mechanical property, the upper limit of Cr is set at 18%.
2)Mn9.0％～11.0％。The effect of Mn element is the part replacement nickel, saves noble metal.Mn can enlarge γ district and stable austenite, and the heat resistance of chromium manganese austenitic stainless steel is than Chromiumnickel Austenite Stainless Steel height.High mangaenese steel can improve molten steel flow simultaneously, is convenient to the absorption of N, thereby improves the mechanical property of steel greatly.If Mn＜9%, then the γ district dwindles, and is unfavorable for austenitic formation and stable, and the magnetic of steel can increase, and plasticity also can reduce; Otherwise, Mn〉and 11%, intensity and hardness decrease after cold working, do not reach design point.During preferred condition, the Mn upper content limit is 10%.
3)C：0.10％～0.18％。Its effect is to improve the intensity of steel and promote austenitic formation.If C〉0.18%, the quantity of carbide will increase, and makes local chromium content minimizing in the matrix, and the erosion resistance of steel will reduce; If C＜0.10%, the intensity of steel will descend, and smelting cost also can increase.So the content of C is set at 0.10～0.18% scope.For obtaining more obvious effect, the upper limit of C content preferably gets 0.16%.
4)N：0.15～0.35％。The effect of N also is part replacement nickel (being equivalent to 30 times nickel equivalent), saves precious metal nickel equally.N also is the element that enlarges γ district and stable austenite, is again solution strengthening element and carbide reinforced element, so can improve the intensity and the toughness of steel, improves hot workability, and making the part ferritic transformation is austenite, thereby improves welding property.N＜0.15% o'clock, the γ district dwindles, and is unfavorable for austenitic formation and stable, and then the intensity of steel and toughness obviously descend; N〉0.35% o'clock, though austenite is more stable, intensity is too high, and institute can dissolved nitrogen be limited in molten steel and the solid phase simultaneously, and too much nitrogen forms nitride segregation and bubble easily, causes hot-workability decline.Preferred N upper content limit value is 0.25%.
Advantage of the present invention and beneficial effect: not nickeliferous austenitic stainless steel of the present invention contains the Ni stainless steel and compares with existing, have economy and suitability concurrently, the manganese and the nitrogen element that contain higher composition, replacement nickel fully, the alloy materials cost is descended, the original stainless erosion resistance of Ni that contains of basic simultaneously maintenance has better mechanical property and intensity; Not nickeliferous austenitic stainless steel hardness height of the present invention, good toughness, anti-puncture ability is strong, can satisfy each industrial circle that high strength requires, and is particularly suitable for making spring, stainless steel shoe-pad etc.
Embodiment
Below in conjunction with embodiment the present invention is described in further detail, but the present invention not only is confined to following examples.
The not nickel austenite stainless steel sample preparation methods of the embodiment of the invention is: batching adopts the 08F steel scrap, extra low carbon ferrochromium (C:0.1%, Cr:60%), electrolytic metal Mn (Mn:99.9%), nitrogenize electrolytic metal Mn (Mn:90%, N:6%) all joins the intermediate frequency furnace smelting with above-mentioned other component except that the nitrogenize electrolytic metal Mn.
When above-mentioned batch mixing all melts, when temperature reaches 1570 ℃, take off most oxidation sludge, add lime (general one ton of material adds 3kg lime), fluorite slag making (viscosity that fluorite is used to regulate slag blanket is improved the flowability of slag blanket), when slag all becomes molten state, during good fluidity,, get the stokehold sample and carry out spectroscopic analysis with 12 batches of silicon calcium powder (Si:55%, Ca:32%) diffusive deoxidations; According to analytical results, adjust alloying constituent, add the nitrogenize electrolytic metal Mn, 8 batches of the diffusing deoxidations in recycle silicon calcium powder ore deposit, concise 10 minutes; Add silico-calcium piece bulk deoxidation, add pure aluminium powder (Al:99.9%) final deoxygenation (general one ton of material adds the 2kg pure aluminium powder) at last, fully stir, get the finished product sample, adjust temperature to 1595 and ℃ come out of the stove; After molten steel is poured ladle into, add the heat preserving agent heat-insulation and heat-preservation, argon bottom-blowing is casting after 3 minutes.
The steel ingot hot rolling technology: enter furnace temperature≤600 ℃, Heating temperature≤1200 ℃, 4 hours 30 minutes heat-up time, start rolling temperature≤1180 ℃, finishing temperature 〉=800 ℃ roll into 2.5mm * 425mm winding.
With hot rolled strip anneal, pickling, surperficial sand milling, cold rolling one-tenth 1.1mm * 425mm winding, again with the winding anneal, the winding of cold rolling one-tenth all thickness remakes last clean annealing, is processed into the finished product of different size as required at last.
Nickel austenite stainless steel production is not identical with industry routine substantially for above-mentioned preparation process.
Concrete component content and the mechanical property of each embodiment of not nickel austenite stainless steel of the present invention are listed in table 1.
Each Performance Detection testing installation is WED-5 type hydraulic dynamometer, smog corrosion case, Vickers hardness tester Hv-5, sole puncture machine TL-040, tortuous machine TL-009A, the desk-top direct-reading spectrometer of Maxx.
Table 1, Stainless Steel Alloy composition of steel of the present invention and performance
As can be seen from Table 1: the Stainless Steel Alloy sample strength height of the embodiment of the invention, the hardness height, good toughness, anti-puncture ability is strong, can satisfy the high strength requirement.
In addition, adopt experimental installation: YWX/Q-750 type salt air corrosion experimental box is to stainless steel salt-fog test of the present invention, corrosion resistance nature to them compares: with 5%NaCl solution week period interval 1 hour to sample spraying 72 hours, 37 ℃ of experimental temperatures, test-results is found: austenitic stainless steel of the present invention only has micro-rust staining, with GB 0Cr
18Ni
9(304) steel is suitable, and erosion resistance is better.
To sum up, the present invention not distinguishing feature of nickel austenite stainless steel is: manganese, nitrogen replace nickel fully, low price, The intensity height, corrosion resistance is good.
Claims (3)
1. nickel austenite stainless steel not is characterized in that: the element that contains following weight percent: Cr 16%～18%, and Mn 9.0%～11.0%, and C 0.10%～0.18%, and N 0.15%～0.35%, and surplus is Fe and unavoidable impurities.
2. not nickel austenite stainless steel according to claim 1, it is characterized in that: the element that contains following weight percent: Cr 17%～17.5%, Mn 9.0%～10.0%, and C 0.13%～0.16%, N 0.16%～0.23%, and surplus is Fe and unavoidable impurities.
3. not nickel austenite stainless steel according to claim 1 is characterized in that: described unavoidable impurities is Si, P, and S, Ni, its weight percent content that allows to use is: Si≤1.0%, P≤0.035%, S≤0.03%, Ni≤0.30%.
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| CN200910097844A CN101532115A (en) | 2009-04-16 | 2009-04-16 | Non-nickel austenite stainless steel |
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| CN200910097844A CN101532115A (en) | 2009-04-16 | 2009-04-16 | Non-nickel austenite stainless steel |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105002431A (en) * | 2015-07-17 | 2015-10-28 | 广东华鳌合金新材料有限公司 | Chrome-manganese-nitrogen austenitic stainless steel and preparation method thereof |
| CN112609134A (en) * | 2020-12-31 | 2021-04-06 | 宁波耀义新材料有限公司 | Novel austenite free-cutting stainless steel material |
-
2009
- 2009-04-16 CN CN200910097844A patent/CN101532115A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105002431A (en) * | 2015-07-17 | 2015-10-28 | 广东华鳌合金新材料有限公司 | Chrome-manganese-nitrogen austenitic stainless steel and preparation method thereof |
| CN112609134A (en) * | 2020-12-31 | 2021-04-06 | 宁波耀义新材料有限公司 | Novel austenite free-cutting stainless steel material |
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Open date: 20090916 |