CN1003379B - Fe-mn-al-cr stainless steel - Google Patents
Fe-mn-al-cr stainless steel Download PDFInfo
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- CN1003379B CN1003379B CN85105573.7A CN85105573A CN1003379B CN 1003379 B CN1003379 B CN 1003379B CN 85105573 A CN85105573 A CN 85105573A CN 1003379 B CN1003379 B CN 1003379B
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- stainless steel
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Abstract
The present invention relates to stainless steel which has stronger corrosion resistance, oxidization resistance and high intensity. The corrosion resistance and vacuole corrosion resistance of the present invention in the sea are better than those of common stainless steel, while the cost of the present invention is only one third of that of common nickel chromium stainless steel. The stainless steel contains 22 to 30 wt% of Mn, 4 to 10 wt% of Al, 3 to 5 wt% of Cr, less than 0.5% or 1 to 1.5% of Si, and less than 0.4% or 0.75 to 1.0% of C. The present invention has the preferable components of 1% of C, 25% of Mn, 5% of Al, 4% of Cr, and 0.4% or 1% of Si.
Description
The invention belongs to ferrous alloy, be applicable to anticorrosively, anti-oxidant, be particularly useful for the structured material of anti-seawater corrosion.
Anticorrosive or oxidation-resistant metallic material adopts nickel chromium stainless steel usually, but this class material is too expensive; 1958, U.S. J.L Ham and R.E.Cairns invented a kind of high strength iron-manganese-aluminium high temperature steel, its composition (percentage ratio meter by weight): 0.76%C, 10.2%Al, 34.4%Mn; " Acta Metallurgica Sinica " VOL20Nol that China publishes reported in 1984 iron-manganese-aluminium-chromium austenite Refractory Steel 37Mn31Al3Cr2MoVNbB and iron-manganese-aluminium austenite low-temperature steel.Though above iron-manganese-aluminium alloy price is more cheap than nickel chromium stainless steel, only be used in high temperature or cryogenic special occasions, and its erosion resistance is far below nickel chromium stainless steel.Iron-aluminium alloy of the clear 56-18070 of Japanese Patent, though the anti-seawater corrosion ability is arranged, property is crisp, can only make tubing with centre spinning method, can not adopt and forge or other press working.
The objective of the invention is to make a kind of ferrous alloy, promptly cheap, easy to process, under normal temperature or hot conditions, all have High Strength Structural Steel more anticorrosive, resistance of oxidation.
Alloy provided by the invention contains:＜0.4% or 0.75～1%C, and 22～30%Mn, 4～10%Al,＜0.5% or 1～1.5%Si, 3～5%Cr, 0.02%R
E,≤0.030%S ,≤0.035%P.The preferential selection: 1%C, 25%Mn, 5%Al, 4%Cr, 0.4% or 1.0%Si.
Alloy Mn25Al5Cr4SiR of the present invention
EWith chromium-nickel austenitic stainless steel 1Cr18Ni9Ti(18-8 commonly used) compare, have the following advantages:
1, have stronger erosion resistance, especially anticorrosive in seawater have obvious superiority with performance cavitation erosion resistant.Fig. 1 is illustrated in the surface topography after the cavitation corrosion in the 3.4%NaCl aqueous solution.Its Fig. 1 a is Mn25Al5Cr4SiR
E, Fig. 1 b is 1Cr18Ni9Ti.Before the present invention, never the someone provides or reported the polarization curve and the cavitation erosion test data of Fe-Mn-Al-Cr alloy.
2. intensity height, wearability is good.Yield strength (σ s) is 70 kilograms/millimeter
2, higher by 121% than 1Cr18Ni9Ti; Breakdown point (σ b) is 100 kilograms/millimeter
2, higher by 53% than 1Cr18Ni9Ti, hardness is HRB99.
3. starting material can adopt ordinary scrap steel, commonly used common in, low carbon ferromanganese, commercial-purity aluminium and middle and high carbon ferrochrome.The source is sufficient, and cheap, cost only is 1/3rd of a 18-8 nickel chromium stainless steel.
4. proportion is lighter, be 7.36 gram/cubic centimetres, and 1Cr18Ni9Ti is 7.79 gram/cubic centimetres.
5. this alloy good toughness, unit elongation (δ
5) be 50.2%, impelling strength (a
K) be 21 kg-m/square centimeters, can stand to forge or the processing of rolling equipressure.
Embodiment:
The present invention is starting material with steel scrap, common ferromanganese (in, low carbon ferromanganese), commercial-purity aluminium and middle and high carbon ferrochrome.Alloying constituent is: 1%C, 25%Mn, 5%Al, 4%Cr, 0.4% or 1%Si, 0.02%R
E, all the other are iron and impurity element.In induction furnace or electric arc furnace, be smelted into ingot casting by this prescription.Before melting, should remove surface film oxide to the starting material aluminium block, add aluminium block before, fully deoxidation of molten steel, deslagging.When material requirements is high, can carry out esr.Solid solubility temperature is 1050 ℃, is incubated air cooling or shrend after two hours.Alloy of the present invention can be cast as required, or rolling becoming a useful person, or forges into base in 1100 ℃ of-850 ℃ of temperature ranges, is machined into other part then.
Claims (2)
1, iron-manganese-aluminium-Chromium Stainless Steel is characterized in that containing (by weight) 0.75～1%C, 22～30%Mn, 4～10%Al,＜0.5% or 1～1.5%Si, 3～5%Cr, 0.02%R
E,≤0.03%S ,≤0.035%P, surplus is Fe.
2, stainless steel according to claim 1 is characterized in that containing (by weight) 1%C, 24～26%Mn, 4～5%Al, 4%Cr, 0.4% or 1.0%Si, 0.02%R
E, surplus is Fe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85105573.7A CN1003379B (en) | 1985-07-18 | 1985-07-18 | Fe-mn-al-cr stainless steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85105573.7A CN1003379B (en) | 1985-07-18 | 1985-07-18 | Fe-mn-al-cr stainless steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN85105573A CN85105573A (en) | 1986-07-02 |
| CN1003379B true CN1003379B (en) | 1989-02-22 |
Family
ID=4794568
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN85105573.7A Expired CN1003379B (en) | 1985-07-18 | 1985-07-18 | Fe-mn-al-cr stainless steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1003379B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1043253C (en) * | 1995-08-18 | 1999-05-05 | 赵学胜 | Al-Mn-Si-N series austenitic stainless acid-resisting steel |
-
1985
- 1985-07-18 CN CN85105573.7A patent/CN1003379B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN85105573A (en) | 1986-07-02 |
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Legal Events
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| C06 | Publication | ||
| PB01 | Publication | ||
| C13 | Decision | ||
| GR02 | Examined patent application | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |