CN110904394A - Super austenitic stainless steel for pump valve products - Google Patents
Super austenitic stainless steel for pump valve products Download PDFInfo
- Publication number
- CN110904394A CN110904394A CN201911271889.6A CN201911271889A CN110904394A CN 110904394 A CN110904394 A CN 110904394A CN 201911271889 A CN201911271889 A CN 201911271889A CN 110904394 A CN110904394 A CN 110904394A
- Authority
- CN
- China
- Prior art keywords
- less
- equal
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- stainless steel
- austenitic stainless
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- 229910000963 austenitic stainless steel Inorganic materials 0.000 title claims abstract description 36
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 20
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 20
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 20
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 10
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 10
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 10
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims abstract description 10
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims abstract description 10
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 10
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 10
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 10
- 239000011651 chromium Substances 0.000 claims abstract description 10
- 229910052802 copper Inorganic materials 0.000 claims abstract description 10
- 239000010949 copper Substances 0.000 claims abstract description 10
- 229910052742 iron Inorganic materials 0.000 claims abstract description 10
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 10
- 239000011572 manganese Substances 0.000 claims abstract description 10
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 10
- 239000011733 molybdenum Substances 0.000 claims abstract description 10
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 10
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 10
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 10
- 239000011574 phosphorus Substances 0.000 claims abstract description 10
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 10
- 239000010703 silicon Substances 0.000 claims abstract description 10
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 10
- 239000011593 sulfur Substances 0.000 claims abstract description 10
- 239000000203 mixture Substances 0.000 claims 2
- 238000005260 corrosion Methods 0.000 abstract description 24
- 230000007797 corrosion Effects 0.000 abstract description 24
- 238000005336 cracking Methods 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 238000002844 melting Methods 0.000 description 5
- 230000008018 melting Effects 0.000 description 5
- 239000012530 fluid Substances 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 241000272534 Struthio camelus Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/001—Austenite
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Details Of Reciprocating Pumps (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses super austenitic stainless steel for a pump valve product, which comprises the following components in percentage by weight: nickel: 17.5% -18.5%, chromium: 19.5% -20.5%, molybdenum: 6% -6.5%, copper: 0.5% -1%, nitrogen: 0.18% -0.22%, carbon: less than or equal to 0.02 percent, manganese: less than or equal to 1 percent, less than or equal to 0.8 percent of silicon, phosphorus: less than or equal to 0.03%, sulfur: less than or equal to 0.01 percent, and the balance being iron. The invention has the advantages that: the corrosion resistance of the pump valve product in the forms of pitting corrosion resistance, crevice corrosion resistance, stress corrosion cracking resistance and the like is good, the pitting corrosion resistance Pl is not less than 40, the forgeability and the toughness of the austenitic stainless steel are maintained, the strength, the plasticity, the corrosion resistance and the like can be greatly improved, the yield strength is at least 50% higher than that of the common austenitic stainless steel, the elongation, the low-temperature performance, the impact resistance and the fracture resistance are also improved, the service life of the pump valve product is greatly prolonged, and the use cost is reduced.
Description
Technical Field
The invention relates to austenitic stainless steel, in particular to super austenitic stainless steel for pump valve products.
Background
With the rapid development of modern industry in China, the application of various fluids with strong acid characteristics makes the requirements on manufacturing materials of pump valve products higher and higher, and the pump valve products not only bear the hydraulic impact of the fluids, but also bear the erosion of various fluids with strong acid characteristics when in work. At present, most of pump valve products are made of austenitic stainless steel, the pump valve products made of austenitic stainless steel are easy to corrode by various fluids with strong acid characteristics in corrosion modes such as point corrosion, crevice corrosion, stress corrosion cracking and the like, the service life of the pump valve products is greatly shortened, and therefore the pump valve products need to be maintained and replaced frequently, and the use cost is greatly improved. In order to adapt to the development of modern industry, the super austenitic stainless steel with good corrosion resistance for pump valve products needs to be developed.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: the super austenitic stainless steel with good corrosion resistance is used for pump valve products.
In order to solve the problems, the invention adopts the technical scheme that: the super austenitic stainless steel for the pump valve product comprises the following components in percentage by weight: nickel: 17.5% -18.5%, chromium: 19.5% -20.5%, molybdenum: 6% -6.5%, copper: 0.5% -1%, nitrogen: 0.18% -0.22%, carbon: less than or equal to 0.02 percent, manganese: less than or equal to 1 percent, less than or equal to 0.8 percent of silicon, phosphorus: less than or equal to 0.03%, sulfur: less than or equal to 0.01 percent, and the balance being iron.
Further, the super austenitic stainless steel used for pump valve products comprises the following components in percentage by weight: 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%, manganese: less than or equal to 0.9 percent, less than or equal to 0.8 percent of silicon, phosphorus: < 0.03%, sulfur: less than or equal to 0.01 percent, and the balance being iron.
The invention has the beneficial effects that: the super austenitic stainless steel used for the pump valve product has good corrosion resistance, the pitting corrosion resistance Pl (Pl is a pitting corrosion index) is more than or equal to 40, the forgeability and the toughness of the austenitic stainless steel are kept, the strength, the plasticity, the corrosion resistance and other properties of the austenitic stainless steel can be greatly improved, the yield strength of the austenitic stainless steel is at least 50% higher than that of the common austenitic stainless steel, the service life of the pump valve product is greatly prolonged, and the use cost is reduced.
Detailed Description
The technical solution of the present invention will be further described in detail with reference to the preferred embodiments.
Example one
The super austenitic stainless steel used for pump valve products in the embodiment comprises the following components in percentage by weight: nickel: 17.5%, chromium: 20.3%, molybdenum: 6%, copper: 0.7%, nitrogen: 0.18%, carbon: less than or equal to 0.02 percent, manganese: less than or equal to 1%, silicon: less than or equal to 0.8 percent, phosphorus: < 0.03%, sulfur: less than or equal to 0.01 percent, and the balance being iron. The super austenitic stainless steel composed of the components has the density of 8.0g/cm3, the melting point of 1320-1390 ℃, the tensile strength Rm of 660Mpa, the yield strength RP0.2 of 310Mpa and the elongation delta of a constant multiple A5 of 36.3 percent, wherein the constant multiple A5 refers to the ratio of the original gauge length to the diameter of a proportional sample of 5.
Example two
The super austenitic stainless steel used for pump valve products in the embodiment comprises the following components in percentage by weight: nickel: 18.1%, chromium: 20.5%, molybdenum: 6.3%, copper: 0.5%, nitrogen: 0.2%, carbon: less than or equal to 0.01 percent, manganese: less than or equal to 1%, silicon: less than or equal to 0.8 percent, phosphorus: less than or equal to 0.03%, sulfur: less than or equal to 0.01 percent, and the balance being iron. The super austenitic stainless steel composed of the components has the density of 8.0g/cm3, the melting point of 1320-1390 ℃, the tensile strength Rm of 654Mpa, the yield strength RP0.2 of 305Mpa and the elongation delta of constant multiple A5 of 35.1 percent.
EXAMPLE III
The super austenitic stainless steel used for pump valve products in the embodiment comprises the following components in percentage by weight: nickel: 18.3%, chromium: 20.1%, molybdenum: 6.0%, copper: 0.9%, nitrogen: 0.22%, carbon: less than or equal to 0.01 percent, manganese: less than or equal to 0.08%, silicon: less than or equal to 0.7 percent, phosphorus: less than or equal to 0.02 percent, sulfur: less than or equal to 0.01 percent, and the balance being iron. The super austenitic stainless steel composed of the components has the density of 8.0g/cm3, the melting point of 1320-1390 ℃, the tensile strength Rm of 690Mpa, the yield strength RP0.2 of 345Mpa and the elongation delta of constant multiple A5 of 40.2 percent.
Example four
The super austenitic stainless steel used for pump valve products in the embodiment comprises the following components in percentage by weight: nickel: 18.5%, chromium: 20%, molybdenum: 6.2%, copper: 1%, nitrogen: 0.21%, carbon: less than or equal to 0.02 percent, manganese: less than or equal to 1 percent, less than or equal to 0.8 percent of silicon, phosphorus: < 0.03%, sulfur: less than or equal to 0.01 percent, and the balance being iron. The super austenitic stainless steel composed of the components has the density of 8.0g/cm3, the melting point of 1320-1390 ℃, the tensile strength Rm of 680MPa, the yield strength RP0.2 of 339MPa and the elongation delta of constant multiple A5 of 38.2 percent.
EXAMPLE five
The super austenitic stainless steel used for pump valve products in the embodiment comprises the following components in percentage by weight: nickel: 18.5%, chromium: 19.5%, molybdenum: 6.5%, copper: 0.8%, nitrogen: 0.22%, carbon: < 0.02%, manganese: less than or equal to 1%, silicon: less than or equal to 0.8 percent, phosphorus: less than or equal to 0.03%, sulfur: less than or equal to 0.01 percent, and the balance being iron. The super austenitic stainless steel composed of the components has the density of 8.0g/cm3, the melting point of 1320-1390 ℃, the tensile strength Rm of 672Mpa, the yield strength RP0.2 of 322Mpa and the elongation delta of constant A5 of 37.4 percent.
The super austenitic stainless steel used for the pump valve product has good corrosion resistance in the forms of pitting corrosion resistance, crevice corrosion resistance, stress corrosion cracking resistance and the like, the pitting corrosion resistance Pl is not less than 40, the strength, plasticity, corrosion resistance and the like can be greatly improved while the malleability and the toughness of the austenitic stainless steel are maintained, the yield strength is at least 50% higher than that of the common austenitic stainless steel, the elongation, the low-temperature performance, the impact resistance and the fracture resistance are also improved, the service life of the pump valve product is greatly prolonged, and the use cost is reduced. In the experiment, the super austenitic stainless steel still can pass a Strauss intergranular corrosion test after being placed at the temperature of 600-1000 ℃ and sensitized for one hour, so that the super austenitic stainless steel can not generate a grain boundary corrosion phenomenon in the welding process. The super austenitic stainless steel can be applied to pump valve products, and can also be applied to products used in severe environments, such as flue gas desulfurization devices, buildings and the like.
Claims (2)
1. Super austenitic stainless steel for pump valve products, characterized in that: the composition comprises the following components in percentage by weight: nickel: 17.5% -18.5%, chromium: 19.5% -20.5%, molybdenum: 6% -6.5%, copper: 0.5% -1%, nitrogen: 0.18% -0.22%, carbon: less than or equal to 0.02 percent, manganese: less than or equal to 1 percent, less than or equal to 0.8 percent of silicon, phosphorus: less than or equal to 0.03%, sulfur: less than or equal to 0.01 percent, and the balance being iron.
2. The super austenitic stainless steel for use in pump and valve products of claim 1, wherein: the composition comprises the following components in percentage by weight: 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%, manganese: less than or equal to 0.9 percent, less than or equal to 0.8 percent of silicon, phosphorus: < 0.03%, sulfur: less than or equal to 0.01 percent, and the balance being iron.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911271889.6A CN110904394A (en) | 2019-12-12 | 2019-12-12 | Super austenitic stainless steel for pump valve products |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911271889.6A CN110904394A (en) | 2019-12-12 | 2019-12-12 | Super austenitic stainless steel for pump valve products |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110904394A true CN110904394A (en) | 2020-03-24 |
Family
ID=69825081
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911271889.6A Pending CN110904394A (en) | 2019-12-12 | 2019-12-12 | Super austenitic stainless steel for pump valve products |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110904394A (en) |
-
2019
- 2019-12-12 CN CN201911271889.6A patent/CN110904394A/en active Pending
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20200324 |