CN104195446A - Superaustenitic stainless steel for pump valve products - Google Patents
Superaustenitic stainless steel for pump valve products Download PDFInfo
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- CN104195446A CN104195446A CN201410381275.4A CN201410381275A CN104195446A CN 104195446 A CN104195446 A CN 104195446A CN 201410381275 A CN201410381275 A CN 201410381275A CN 104195446 A CN104195446 A CN 104195446A
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Abstract
The invention discloses a superaustenitic stainless steel for pump valve products. The superaustenitic stainless steel comprises the following components in percentage by weight: 17.5%-18.5% of nickel, 19.5%-20.5% of chromium, 6%-6.5% of molybdenum, 0.5%-1% of copper, 0.18%-0.22% of nitrogen, less than or equal to 0.02% of carbon, less than or equal to 1% of manganese, less than or equal to 0.8% of silicon, less than or equal to 0.03% of phosphorus, less than or equal to 0.01% of sulfur and the balance of iron. The superaustenitic stainless steel for the pump valve products has the following advantages that the corrosion resistance in forms such as pitting corrosion resistance, crevice corrosion resistance, and stress corrosion and breakage resistance of the superaustenitic stainless steel is good, the pitting corrosion P1 of the superaustenitic stainless steel is greater than or equal to 40, while the forgeability and toughness of the austenitic stainless steel are maintained, the properties such as strength, plasticity and corrosion resistance of the superaustenitic stainless steel can be greatly improved, the yield strength of the superaustenitic stainless steel is at least 50% higher than that of the common austenitic stainless steel, and the ductility, low temperature properties, impact resistance and breaking ability of the superaustenitic stainless steel also are improved, so that the service lives of the pump valve products can be greatly prolonged and the use cost can be reduced.
Description
Technical field
The present invention relates to austenitic stainless steel, particularly a kind of for the super austenitic stainless steel on pump valve products.
Background technology
Along with developing rapidly of China's modernization industry, the application of the various fluids with strong acid characteristic makes the requirement of the manufactured materials to pump valve products more and more higher, the hydraulicefficiency impact that pump valve products not only will bear fluid in the time of work, but also the erosion that will bear the various fluids with strong acid characteristic.The manufactured materials of current most pump valve products generally adopts austenitic stainless steel, the pump valve products of austenite stainless steel making is easily corroded with Corrosion Types such as pitting attack, crevice corrosion, stress corrosion crackings by the various fluids with strong acid characteristic, greatly reduce the work-ing life of pump valve products, thereby need often it safeguarded and change, greatly improve use cost.In order to adapt to the development of modernization industry, need to develop a kind of good corrosion resistance for the super austenitic stainless steel on pump valve products.
Summary of the invention
The technical problem of solution required for the present invention is: provide a kind of corrosion resistance and good for the super austenitic stainless steel on pump valve products.
For addressing the above problem, the technical solution used in the present invention is: described for the super austenitic stainless steel on pump valve products, its moiety and each composition weight percent are as follows: nickel: 17.5%～18.5%, chromium: 19.5%～20.5%, molybdenum: 6%～6.5%, copper: 0.5%～1%, nitrogen: 0.18%～0.22%, carbon :≤0.02%, violent :≤1%, silicon≤0.8%, phosphorus :≤0.03%, sulphur :≤0.01%, surplus is iron.
Further, aforesaid for the super austenitic stainless steel on pump valve products, its moiety and each composition weight percent are as follows: nickel: 18.1%～18.5%, chromium: 20%～20.3%, molybdenum: 6.0%～6.3%, copper: 0.7%～0.9%, nitrogen: 0.2%～0.22%, carbon: < 0.02%, violent :≤0.9%, silicon≤0.8%, phosphorus: < 0.03%, sulphur :≤0.01%, surplus is iron.
The invention has the beneficial effects as follows: above-mentioned for the super austenitic stainless steel on pump valve products, corrosion resistance and good, its corrosion resistance Pl (Pl is spot corrosion index) >=40, and in keeping austenitic stainless steel forging property and toughness, can also greatly improve its intensity, plasticity, the performance such as corrosion-resistant, the yield strength of the common austenitic stainless steel of its yield strength ratio exceeds at least 50%, has greatly extended the work-ing life of pump valve products, has reduced use cost.
Embodiment
Below in conjunction with preferred embodiment, technical solutions according to the invention are described in further detail.
Embodiment mono-
Described in the present embodiment for the super austenitic stainless steel on pump valve products, its moiety and each composition weight percent are as follows: nickel: 17.5%, and chromium: 20.3%, molybdenum: 6%, copper: 0.7%, nitrogen: 0.18%, carbon :≤0.02%, violent :≤1%, silicon :≤0.8%, phosphorus: < 0.03%, sulphur :≤0.01%, surplus is iron.The stainless density of super austenitic being made up of above-mentioned each moiety is 8.0g/cm
3, fusing point is 1320～1390 DEG C, tensile strength Rm is 660Mpa, yield strength R
p0.2for 310Mpa, the unit elongation δ that determines multiple A5 is 36.3%, wherein determines multiple A5 and refers to that the original gauge length of proportional test bar and diameter ratio are 5.
Embodiment bis-
Described in the present embodiment for the super austenitic stainless steel on pump valve products, its moiety and each composition weight percent are as follows: nickel: 18.1%, and chromium: 20.5%, molybdenum: 6.3%, copper: 0.5%, nitrogen: 0.2%, carbon :≤0.01%, violent :≤1%, silicon :≤0.8%, phosphorus :≤0.03%, sulphur :≤0.01%, surplus is iron.The stainless density of super austenitic being made up of above-mentioned each moiety is 8.0g/cm
3, fusing point is 1320～1390 DEG C, tensile strength Rm is 654Mpa, yield strength R
p0.2for 305Mpa, the unit elongation δ that determines multiple A5 is 35.1%.
Embodiment tri-
Described in the present embodiment for the super austenitic stainless steel on pump valve products, its moiety and each composition weight percent are as follows: nickel: 18.3%, and chromium: 20.1%, molybdenum: 6.0%, copper: 0.9%, nitrogen: 0.22%, carbon :≤0.01%, violent :≤0.08%, silicon :≤0.7%, phosphorus :≤0.02%, sulphur :≤0.01%, surplus is iron.The stainless density of super austenitic being made up of above-mentioned each moiety is 8.0g/cm
3, fusing point is 1320～1390 DEG C, tensile strength Rm is 690Mpa, yield strength R
p0.2for 345Mpa, the unit elongation δ that determines multiple A5 is 40.2%.
Embodiment tetra-
Described in the present embodiment for the super austenitic stainless steel on pump valve products, its moiety and each composition weight percent are as follows: nickel: 18.5%, and chromium: 20%, molybdenum: 6.2%, copper: 1%, nitrogen: 0.21%, carbon :≤0.02%, violent :≤1%, silicon≤0.8%, phosphorus: < 0.03%, sulphur :≤0.01%, surplus is iron.The stainless density of super austenitic being made up of above-mentioned each moiety is 8.0g/cm
3, fusing point is 1320～1390 DEG C, tensile strength Rm is 680Mpa, yield strength R
p0.2for 339Mpa, the unit elongation δ that determines multiple A5 is 38.2%.
Embodiment five
Described in the present embodiment for the super austenitic stainless steel on pump valve products, its moiety and each composition weight percent are as follows: nickel: 18.5%, and chromium: 19.5%, molybdenum: 6.5%, copper: 0.8%, nitrogen: 0.22%, carbon: < 0.02%, violent :≤1%, silicon :≤0.8%, phosphorus :≤0.03%, sulphur :≤0.01%, surplus is iron.The stainless density of super austenitic being made up of above-mentioned each moiety is 8.0g/cm
3, fusing point is 1320～1390 DEG C, tensile strength Rm is 672Mpa, yield strength R
p0.2for 322Mpa,, the unit elongation δ that determines multiple A5 is 37.4%.
Above-mentioned for the super austenitic stainless steel on pump valve products, the corrosion resistance and good of the forms such as resistance to pitting attack, slit and corrosion resistant, stress corrosion resistant break, its corrosion resistance Pl >=40, in keeping austenitic stainless steel forging property and toughness, can also greatly improve intensity, plasticity, the performance such as corrosion-resistant, the yield strength of the common austenitic stainless steel of its yield strength ratio exceeds at least 50%, unit elongation, low-temperature performance, impact resistance and break resistance have also improved, greatly extend the work-ing life of pump valve products, reduced use cost.In the time of experiment, this super austenitic stainless steel is placed at 600～1000 DEG C of temperature and still can passes through Astrid Strauss Huey test after sensitization is after an hour processed, thereby such super austenitic stainless steel there will not be grain boundary corrosion phenomenon in the time of welding.Such super austenitic stainless steel, except being applied on pump valve products, can also be applied to the product for severe environment such as flue gas desulfurization (FGD) unit, building.
Claims (2)
1. for the super austenitic stainless steel on pump valve products, it is characterized in that: its moiety and each composition weight percent are as follows: nickel: 17.5%～18.5%, chromium: 19.5%～20.5%, molybdenum: 6%～6.5%, copper: 0.5%～1%, nitrogen: 0.18%～0.22%, carbon :≤0.02%, violent :≤1%, silicon≤0.8%, phosphorus :≤0.03%, sulphur :≤0.01%, surplus is iron.
According to claimed in claim 1 for the super austenitic stainless steel on pump valve products, it is characterized in that: its moiety and each composition weight percent are as follows: nickel: 18.1%～18.5%, chromium: 20%～20.3%, molybdenum: 6.0%～6.3%, copper: 0.7%～0.9%, nitrogen: 0.2%～0.22%, carbon: < 0.02%, violent :≤0.9%, silicon≤0.8%, phosphorus: < 0.03%, sulphur :≤0.01%, surplus is iron.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410381275.4A CN104195446A (en) | 2014-08-06 | 2014-08-06 | Superaustenitic stainless steel for pump valve products |
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| CN201410381275.4A CN104195446A (en) | 2014-08-06 | 2014-08-06 | Superaustenitic stainless steel for pump valve products |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107904516A (en) * | 2017-11-25 | 2018-04-13 | 中国电建集团郑州泵业有限公司 | A kind of noncorrosive pump friction pair and preparation method thereof |
| CN110565029A (en) * | 2019-09-20 | 2019-12-13 | 中航上大高温合金材料有限公司 | Production process of S31254 super austenitic stainless steel |
| WO2020127789A1 (en) | 2018-12-20 | 2020-06-25 | Voestalpine Böhler Edelstahl Gmbh & Co Kg | Superaustenitic material |
| CN114635077A (en) * | 2020-12-16 | 2022-06-17 | 宝武特种冶金有限公司 | Super austenitic stainless steel and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101670520A (en) * | 2009-09-17 | 2010-03-17 | 苏州贝思特金属制品有限公司 | Method for manufacturing seamless steel tube |
-
2014
- 2014-08-06 CN CN201410381275.4A patent/CN104195446A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101670520A (en) * | 2009-09-17 | 2010-03-17 | 苏州贝思特金属制品有限公司 | Method for manufacturing seamless steel tube |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107904516A (en) * | 2017-11-25 | 2018-04-13 | 中国电建集团郑州泵业有限公司 | A kind of noncorrosive pump friction pair and preparation method thereof |
| CN107904516B (en) * | 2017-11-25 | 2019-07-02 | 中国电建集团郑州泵业有限公司 | A kind of noncorrosive pump friction pair and preparation method thereof |
| WO2020127789A1 (en) | 2018-12-20 | 2020-06-25 | Voestalpine Böhler Edelstahl Gmbh & Co Kg | Superaustenitic material |
| WO2020127788A1 (en) | 2018-12-20 | 2020-06-25 | Voestalpine Böhler Edelstahl Gmbh Co. | Superaustenitic material |
| DE102018133255A1 (en) | 2018-12-20 | 2020-06-25 | Voestalpine Böhler Edelstahl Gmbh & Co Kg | Super austenitic material |
| CN110565029A (en) * | 2019-09-20 | 2019-12-13 | 中航上大高温合金材料有限公司 | Production process of S31254 super austenitic stainless steel |
| CN114635077A (en) * | 2020-12-16 | 2022-06-17 | 宝武特种冶金有限公司 | Super austenitic stainless steel and preparation method thereof |
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Application publication date: 20141210 |