CN104060186A - Chromium-nickel-saving-type high-aluminum heat-resistance stainless steel - Google Patents
Chromium-nickel-saving-type high-aluminum heat-resistance stainless steel Download PDFInfo
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Abstract
The invention discloses chromium-nickel-saving-type high-aluminum heat-resistance stainless steel. The heat-resistant stainless steel comprises the following components in percentage by mass: less than or equal to 0.2% of C, less than or equal to 1.5% of Mn, less than or equal to 0.03% of P, less than or equal to 0.03% of S, 2.0-3.5% of Al, 10.0-16.0% of Ni, 15.0-23.0% of Cr, less than or equal to 1.5% of Si, 0.05-0.5 % of Ce or Y and the balance of iron. The heat-resistant stainless steel has the characteristics of good high-temperature mechanical properties and oxidation resistance and low production costs and the dependence on precious metals is significantly reduced so as to make contribution to the conservation of national resources. The room temperature tensile strength range of the heat-resistant stainless steel alloy material is 600-800Mpa, the yield strength sigma0.2 is 220-400Mpa, the elongation at break is 40-70% and the oxidation resistance of the alloy is superior to that of 310S steel.
Description
Technical field
The present invention relates to a kind of joint chromium nickel-saving type high alumina heat-resistance stainless steel alloy material, belong to steel alloy material technical field.
Background technology
High temperature steel is the steel with oxidation-resistance and enough hot strength and good resistance toheat using under hot conditions, is widely used in the industries such as metallurgy, aviation and thermal power generation.Antioxidant property is the factor of high temperature steel overriding concern.At present, conventional Fe base or the heat-resisting superalloy of Ni base are that Cr2O3 layer by Surface Creation plays antioxidant effect on substantially.And compare with Cr2O3, under high-temperature work environment, A12O3 has more provide protection.Al2O3 protective membrane is not only fine and close, firm, and not volatile, at 1200 ~ 1250 ℃, still has higher stability.The speed of growth of A12O3 is than low 1～2 order of magnitude of Cr2O3, and from thermodynamics, A12O3 has higher thermodynamic stability.Simultaneously, in some nickeliferous high temperature steel, when nickel aluminium can form intermetallic compound Ni3Al (γ ' phase) under certain proportioning and temperature condition, thus can reach self solid solution, separate out and with three kinds of strengthening effects of coherency strain of austenitic matrix.Therefore, in high temperature steel, add suitable aluminium can obviously improve the high-temperature oxidation resistance of high temperature steel, make it have good mechanical behavior under high temperature and antioxidant property.310S is the heat-resisting austenitic stainless steel of chromium nickel of American foundryman's society's exploitation.Since coming out, 310S high temperature steel, just with its good creep property, high-temperature corrosion resistance performance and machining property, starts to be widely used on the high-temperature component of petrochemical equipment.Along with the further sustainable growth of domestic stainless steel production capacity and apparent consumption demand, the problem of chromium and nickel resources scarcity is known together by increasing people.In order to reduce raw materials cost, on the basis of 310S, by replacing chromium with aluminium, low nickel content falls simultaneously, develop a kind of new joint chromium nickel-saving type high alumina heat-resistance stainless steel.This alloy has obvious cost advantage, significantly reduces the interdependency to precious metal simultaneously, thereby makes and should have contribution for national resources saving.
Summary of the invention
The object of the present invention is to provide a kind of joint chromium nickel-saving type high alumina heat-resistance stainless steel with good mechanical behavior under high temperature and antioxidant property.
The present invention is achieved by the following technical solution:
Joint chromium nickel-saving type high alumina heat-resistance stainless steel, this heat-resistance stainless steel has following composition and mass percent: C≤0.2%, Mn≤1.5%, P≤0.03%, S≤0.03%, Al2.0-3.5%, Ni10.0-16.0%, Cr15.0-23.0%, Si≤1.5%, Ce or Y 0.05-0.5%, rest part is iron.
The present invention saves chromium nickel-saving type high alumina heat-resistance stainless steel alloy material and adopts the conventional smelting process of tradition, before casting, rare earth intermediate alloy is dropped into; Master alloy is comprised of iron and rare earth metal, selects Fe-Ce or Fe-Y master alloy; Both compositions are respectively: in Fe-Ce master alloy, the quality percentage composition of Ce is 23.5%; In Fe-Y master alloy, the quality percentage composition of Y is 15%; After comprehensive batching is founded, casting, through forge hot and solution treatment, finally makes joint chromium nickel-saving type high alumina heat-resistance stainless steel.Steel in this composition range after forge hot again through certain temperature solution treatment, room temperature tensile strength is in 600～800Mpa scope, yield strength σ 0.2 is in 220～400Mpa scope, and tension set is in 40～70% scopes, and the antioxidant property of this alloy is better than 310S steel.
Mechanism of the present invention is as follows:
According to alloying principle, with aluminium, for chromium, reduce the chromium content in alloy; Under hot conditions, aluminium forms fine and close alumina layer at alloy surface simultaneously, improves the high-temperature oxidation resistance of high temperature steel, makes it have good mechanical behavior under high temperature and antioxidant property.
The present invention compared with prior art has following beneficial effect:
Conventional Fe base or the heat-resisting superalloy of Ni base are that the Cr2O3 layer by Surface Creation plays antioxidant effect on substantially.And compare with Cr2O3, under high-temperature work environment, A12O3 has more provide protection.Al2O3 protective membrane is not only fine and close, firm, and not volatile, at 1200 ~ 1250 ℃, still has higher stability.The speed of growth of A12O3 is than low 1～2 order of magnitude of Cr2O3, and from thermodynamics, A12O3 has higher thermodynamic stability.Simultaneously, in some nickeliferous high temperature steel, when nickel aluminium can form intermetallic compound Ni3Al (γ ' phase) under certain proportioning and temperature condition, thus can reach self solid solution, separate out and with three kinds of strengthening effects of coherency strain of austenitic matrix.The present invention can obviously improve the high-temperature oxidation resistance of high temperature steel, has good mechanical behavior under high temperature and antioxidant property.And there is obvious cost advantage, significantly reduce the interdependency to precious metal simultaneously, thereby make and should have contribution for national resources saving.The present invention saves the room temperature tensile strength of chromium nickel-saving type high alumina heat-resistance stainless steel alloy material in 600～800Mpa scope, and yield strength σ 0.2 is in 220～400Mpa scope, and tension set is in 40～70% scopes, and the antioxidant property of this alloy is better than 310S steel.
Embodiment
Below in conjunction with embodiment, the invention will be further described.
Embodiment 1:
A joint chromium nickel-saving type high alumina heat-resistance stainless steel, this heat-resistance stainless steel has following composition and mass percent:
C 0.12%
Mn 0.74%
P 0.011%
S 0.007%
Al 3.0%
Ni 15.3%
Cr 18.4%
Si 1.4%
Rare-Earth Ce 0.1%
Fe surplus
Adopt the conventional smelting process of tradition, before casting, rare earth intermediate alloy is dropped into.Through comprehensive metering, calculate and after batching founds, casting, through forge hot and solution treatment, finally make joint chromium nickel-saving type high alumina heat-resistance stainless steel alloy material, the room temperature tensile strength of this material is greater than 700MPa, yield strength σ 0.2 is 300MPa, and tension set is greater than 40%, and the antioxidant property in the time of 1000 ℃ is better than 310S steel.
Embodiment 2:
A joint chromium nickel-saving type high alumina heat-resistance stainless steel, this heat-resistance stainless steel has following composition and mass percent:
C 0.13%
Mn 0.80%
P 0.010%
S 0.008%
Al 2.2%
Ni 14.9%
Cr 18.1%
Si 1.3%
Rare Earth Y 0.1%
Fe surplus
Adopt the conventional smelting process of tradition, before casting, rare earth intermediate alloy is dropped into.Through comprehensive metering, calculate and after batching founds, casting, through forge hot and solution treatment, finally make joint chromium nickel-saving type high alumina heat-resistance stainless steel alloy material, the room temperature tensile strength of this material is greater than 700MPa, yield strength σ 0.2 is 300MPa, and tension set is greater than 40%, and the antioxidant property in the time of 1000 ℃ is better than 310S steel.
Embodiment 3:
A joint chromium nickel-saving type high alumina heat-resistance stainless steel, this heat-resistance stainless steel has following composition and mass percent:
C 0.11%
Mn 0.89%
P 0.009%
S 0.007%
Al 3.4%
Ni 15.8%
Cr 19.1%
Si 1.2%
Rare Earth Y 0.1%
Fe surplus
Adopt the conventional smelting process of tradition, before casting, rare earth intermediate alloy is dropped into.Through comprehensive metering, calculate and after batching founds, casting, through forge hot and solution treatment, finally make joint chromium nickel-saving type high alumina heat-resistance stainless steel alloy material, the room temperature tensile strength of this material is greater than 700MPa, yield strength σ 0.2 is 302MPa, and tension set is greater than 40%, and the antioxidant property in the time of 1000 ℃ is better than 310S steel.
Such joint chromium nickel-saving type high alumina heat-resistance stainless steel material has excellent room temperature mechanical strength, there is the better antioxidant property than 310S simultaneously, can be used as the substitute products of 310S as aspects such as vapor pipe, microwave oven, high temperature flues, and there is obvious cost advantage.
Claims (1)
1. save chromium nickel-saving type high alumina heat-resistance stainless steel, it is characterized in that: this heat-resistance stainless steel has following composition and mass percent: C≤0.2%, Mn≤1.5%, P≤0.03%, S≤0.03%, Al2.0-3.5%, Ni10.0-16.0%, Cr15.0-23.0%, Si≤1.5%, Ce or Y 0.05-0.5%, rest part is iron.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410324879.5A CN104060186A (en) | 2014-07-09 | 2014-07-09 | Chromium-nickel-saving-type high-aluminum heat-resistance stainless steel |
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| CN201410324879.5A CN104060186A (en) | 2014-07-09 | 2014-07-09 | Chromium-nickel-saving-type high-aluminum heat-resistance stainless steel |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04235220A (en) * | 1991-01-09 | 1992-08-24 | Kawasaki Steel Corp | Production of austenitic stainless steel excellent in strength at high temperature and oxidation resistance |
| JPH09263906A (en) * | 1996-01-23 | 1997-10-07 | Hitachi Metals Ltd | Iron-nickel-chrome-alum. ferritic alloy and its production |
| WO2008086141A1 (en) * | 2007-01-04 | 2008-07-17 | Ut-Battelle, Llc | Oxidation resistant high creep strength austenitic stainless steel |
| CN102230137A (en) * | 2011-06-20 | 2011-11-02 | 宣达实业集团有限公司 | Austenitic heat-resistant stainless steel and processing method thereof |
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2014
- 2014-07-09 CN CN201410324879.5A patent/CN104060186A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04235220A (en) * | 1991-01-09 | 1992-08-24 | Kawasaki Steel Corp | Production of austenitic stainless steel excellent in strength at high temperature and oxidation resistance |
| JPH09263906A (en) * | 1996-01-23 | 1997-10-07 | Hitachi Metals Ltd | Iron-nickel-chrome-alum. ferritic alloy and its production |
| WO2008086141A1 (en) * | 2007-01-04 | 2008-07-17 | Ut-Battelle, Llc | Oxidation resistant high creep strength austenitic stainless steel |
| CN102230137A (en) * | 2011-06-20 | 2011-11-02 | 宣达实业集团有限公司 | Austenitic heat-resistant stainless steel and processing method thereof |
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Application publication date: 20140924 |