CN112853231A - Stainless steel seamless steel tube for high-pressure boiler and manufacturing method thereof - Google Patents
Stainless steel seamless steel tube for high-pressure boiler and manufacturing method thereof Download PDFInfo
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- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 96
- 239000010935 stainless steel Substances 0.000 title claims abstract description 96
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 92
- 239000010959 steel Substances 0.000 title claims abstract description 92
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 24
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 18
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 16
- 239000011733 molybdenum Substances 0.000 claims abstract description 16
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 12
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 12
- 239000011651 chromium Substances 0.000 claims abstract description 12
- 229910052802 copper Inorganic materials 0.000 claims abstract description 12
- 239000010949 copper Substances 0.000 claims abstract description 12
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 12
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 12
- 239000010703 silicon Substances 0.000 claims abstract description 12
- 238000012545 processing Methods 0.000 claims abstract description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 9
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 9
- 229910052742 iron Inorganic materials 0.000 claims abstract description 9
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 9
- 239000011574 phosphorus Substances 0.000 claims abstract description 9
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 claims abstract description 8
- 238000005496 tempering Methods 0.000 claims description 15
- 238000010791 quenching Methods 0.000 claims description 11
- 230000000171 quenching effect Effects 0.000 claims description 11
- VVTSZOCINPYFDP-UHFFFAOYSA-N [O].[Ar] Chemical compound [O].[Ar] VVTSZOCINPYFDP-UHFFFAOYSA-N 0.000 claims description 9
- 229910000734 martensite Inorganic materials 0.000 claims description 9
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 6
- 229910052748 manganese Inorganic materials 0.000 claims description 6
- 239000011572 manganese Substances 0.000 claims description 6
- 229910000963 austenitic stainless steel Inorganic materials 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- 238000003723 Smelting Methods 0.000 claims description 3
- 238000004512 die casting Methods 0.000 claims description 3
- 238000007670 refining Methods 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 230000007797 corrosion Effects 0.000 abstract description 14
- 238000005260 corrosion Methods 0.000 abstract description 14
- 238000005452 bending Methods 0.000 abstract description 3
- 238000003466 welding Methods 0.000 abstract description 3
- 239000012535 impurity Substances 0.000 abstract description 2
- 238000005482 strain hardening Methods 0.000 abstract 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 8
- 238000000034 method Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 229910001566 austenite Inorganic materials 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000001627 detrimental effect Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910001563 bainite Inorganic materials 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910001562 pearlite Inorganic materials 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
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- 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
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
-
- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
- C21D9/085—Cooling or quenching
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C30/00—Alloys containing less than 50% by weight of each constituent
- C22C30/02—Alloys containing less than 50% by weight of each constituent containing copper
-
- 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
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- 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
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- 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
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- 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
- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
-
- 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
- C21D2211/008—Martensite
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Abstract
The invention relates to a stainless steel seamless steel tube for a high-pressure boiler and a manufacturing method thereof, wherein the stainless steel seamless steel tube for the high-pressure boiler comprises, by mass, 20% -23% of chromium, 23% -30% of nickel, 4% -6% of molybdenum, 1% -3% of copper, less than 0.02% of carbon, 1% -2% of manganese, 1% -1.5% of silicon, less than or equal to 0.045% of phosphorus and the balance of iron. The stainless steel seamless steel tube for the high-pressure boiler disclosed by the invention takes the characteristics of a TP347H seamless steel tube as a reference, adopts optimized internal control components, is detected according to relevant standards, and comprehensive control parameters of a macrostructure, non-metallic impurities, alpha phase content, grain size and the like of a tube blank can meet the requirements of the heat resistance and corrosion resistance of the high-pressure boiler, meet the requirements of high-temperature structure stability, durability resistance and high-temperature corrosion resistance required by the high-pressure boiler, and also have good processing performances of hot working, cold working, welding, bending and the like.
Description
Technical Field
The invention relates to the technical field of manufacturing and processing of seamless steel pipes, in particular to a stainless steel seamless steel pipe for a high-pressure boiler and a manufacturing method thereof.
Background
The heat-resistant and corrosion-resistant stainless steel seamless steel pipe used in the high-pressure boiler is generally made of TP347H material, and the stainless steel seamless steel pipe is a main material widely applied to manufacturing large-scale generator set boiler superheater pipes, reheater pipes, steam pipelines and petrochemical heat exchange pipes, mainly depends on import at present, and is expensive.
Because the imported seamless steel pipe is expensive, a plurality of manufacturers have to select other grades of steel for replacement, but the requirements for replacing the steel for the steel have to meet the requirements of high-temperature structure stability, durability resistance and high-temperature corrosion resistance, and have good processing performances such as hot processing, cold processing, welding, bending and the like.
The application environment of the seamless steel pipe used in the high-pressure boiler is high temperature, high pressure and high corrosion conditions, and the service environment is severe. How to enable the seamless steel tube to simultaneously meet the performance requirements of heat resistance and corrosion resistance of a high-pressure boiler is a technical problem to be solved urgently in the field.
Disclosure of Invention
The invention aims to provide a stainless steel seamless steel tube for a high-pressure boiler and a manufacturing method thereof, and aims to solve the technical problems that how to enable the seamless steel tube to meet the requirements of the high-pressure boiler on heat resistance and corrosion resistance is required, and the stainless steel seamless steel tube made of TP347H material is replaced, so that the manufacturing cost is reduced.
The invention aims to solve the defects of the prior art and provides a stainless steel seamless steel tube for a high-pressure boiler, which comprises, by mass, 20-23% of chromium, 23-30% of nickel, 4-6% of molybdenum, 1-3% of copper, less than 0.02% of carbon, 1-2% of manganese, 1-1.5% of silicon, less than or equal to 0.045% of phosphorus and the balance of iron.
The density of the stainless steel seamless steel pipe for the high-pressure boiler is 8.0g/cm3。
The tensile strength sigma b of the stainless steel seamless steel tube for the high-pressure boiler is more than or equal to 520 Mpa.
The elongation delta of the stainless steel seamless steel tube for the high-pressure boiler is larger than or equal to 35 percent.
The invention also provides a manufacturing method of the stainless steel seamless steel tube for the high-pressure boiler, which comprises the following steps:
firstly, processing stainless steel:
the stainless steel comprises the following chemical components, by mass, 20-23% of chromium, 23-30% of nickel, 4-6% of molybdenum, 1-3% of copper, less than 0.02% of carbon, 1-2% of manganese, 1-1.5% of silicon, less than or equal to 0.045% of phosphorus and the balance of iron;
secondly, primary smelting in an electric furnace:
feeding the stainless steel processed in the first step into an electric furnace, which heats the stainless steel to 1100 ℃ to 1300 ℃ at a rate of 55 ℃ to 85 ℃ per minute; in the temperature range of 900-1300 ℃, the stainless steel heated in an electric furnace is subjected to hot forming through the production processes of die casting forming, cogging of a large-caliber reinforced blooming mill and hot continuous rolling to obtain a stainless steel seamless steel pipe;
thirdly, refining in an argon-oxygen furnace:
cooling the stainless steel seamless steel tube to ambient temperature, then feeding the cooled stainless steel seamless steel tube into an argon-oxygen furnace, heating the stainless steel seamless steel tube to an austenitizing temperature of between a first temperature and 1000 ℃ at a rate of between 135 ℃ and 185 ℃ per minute, and then maintaining the stainless steel seamless steel tube at the austenitizing temperature for a period of between 5 minutes and 45 minutes to obtain an austenitized stainless steel seamless steel tube; then sending the austenitic stainless steel seamless steel pipe into a quenching machine to be cooled to ambient temperature so as to obtain a quenched stainless steel seamless steel pipe;
fourthly, tempering:
feeding the quenched stainless steel seamless steel tube into an argon-oxygen furnace to heat again to a tempering temperature of 500 ℃ to a second temperature at a rate of 135 ℃ to 185 ℃ per minute, then maintaining the stainless steel seamless steel tube at the tempering temperature for a period of 10 minutes to 100 minutes, and then cooling the stainless steel seamless steel tube to ambient temperature to obtain a quenched and tempered stainless steel seamless steel tube.
Preferably, the third step is repeated at least once before the tempering of the fourth step is performed to achieve double or multiple quenching.
Preferably, the quenched stainless steel seamless steel tube comprises at least 90% martensite.
More preferably, the quenched stainless steel seamless steel tube comprises at least 95% martensite.
Preferably, the first temperature is determined according to a first formula as follows:
the first temperature 920-.
Further preferably, the second temperature is determined according to the following second formula:
the second temperature is 750 to 10.7 × manganese to 19.6 × nickel to 21.9 × silicon to 19.6 × chromium to 6.83 × copper to 209 × molybdenum, and the unit of the second temperature is ℃.
Advantageous effects
Compared with the prior art, the invention has the beneficial effects that: the stainless steel seamless steel tube for the high-pressure boiler disclosed by the invention takes the characteristics of a TP347H material seamless steel tube as a reference, adopts optimized internal control components, and is detected according to related standards, and the comprehensive control parameters of the macrostructure, non-metallic impurities, alpha phase content, grain size and the like of the tube blank can meet the requirements of the heat resistance and corrosion resistance of the high-pressure boiler, meet the requirements of the high-temperature structure stability, the durability resistance and the high-temperature corrosion resistance required by the high-pressure boiler, and also have good processing performances of hot processing, cold processing, welding, bending and the like.
The manufacturing method of the stainless steel seamless steel tube for the high-pressure boiler optimizes various process parameters in a forming process, a large amount of ferrite, bainite and pearlite in the stainless steel can damage the toughness of the seamless steel tube in a corrosive environment, high manganese content can cause large amount of segregation, and the stability of a high-temperature structure is reduced, but manganese elements are favorable for hot workability of the stainless steel and hardenability caused by strengthening of a solute solution, a tempered martensite microstructure with more uniform thickness can be realized by controlling the process parameters through the manufacturing method, molybdenum elements are favorable for improving the corrosion resistance of protective scales, and an applicant finds that at least 4% by weight of molybdenum is needed to improve the corrosion performance. In addition, molybdenum is beneficial to hardenability, and the tempering temperature can be increased under the condition that other process parameters are not changed due to the existence of molybdenum.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.
FIG. 1 is a block diagram showing the flow of the method for manufacturing a seamless stainless steel tube for a high-pressure boiler according to the present invention.
Detailed Description
The present invention is described in more detail below to facilitate an understanding of the present invention.
As shown in FIG. 1, the stainless steel seamless steel tube for a high-pressure boiler and the manufacturing method thereof according to the present invention comprises the following steps:
firstly, processing stainless steel:
the stainless steel comprises the following chemical components, by mass, 20-23% of chromium, 23-30% of nickel, 4-6% of molybdenum, 1-3% of copper, less than 0.02% of carbon, 1-2% of manganese, 1-1.5% of silicon, less than or equal to 0.045% of phosphorus and the balance of iron;
secondly, primary smelting in an electric furnace:
feeding the stainless steel processed in the first step into an electric furnace, which heats the stainless steel to 1100 ℃ to 1300 ℃ at a rate of 55 ℃ to 85 ℃ per minute; in the temperature range of 900-1300 ℃, the stainless steel heated in an electric furnace is subjected to hot forming through the production processes of die casting forming, cogging of a large-caliber reinforced blooming mill and hot continuous rolling to obtain a stainless steel seamless steel pipe;
heating the stainless steel to 1100 ℃ to 1300 ℃ is advantageous in that the stainless steel undergoes high deformation during hot forming, with maximum temperatures above 1300 ℃ causing combustion and temperatures below 1100 ℃ adversely affecting the hot ductility of the stainless steel.
Thirdly, refining in an argon-oxygen furnace:
cooling the stainless steel seamless steel tube to ambient temperature, then feeding the cooled stainless steel seamless steel tube into an argon-oxygen furnace, heating the stainless steel seamless steel tube to an austenitizing temperature of between a first temperature and 1000 ℃ at a rate of between 135 ℃ and 185 ℃ per minute, and then maintaining the stainless steel seamless steel tube at the austenitizing temperature for a period of between 5 minutes and 45 minutes to obtain an austenitized stainless steel seamless steel tube; then sending the austenitic stainless steel seamless steel pipe into a quenching machine to be cooled to ambient temperature so as to obtain a quenched stainless steel seamless steel pipe;
the stainless steel seamless steel pipe is heated to the austenitizing temperature of between a first temperature and 1000 ℃, and the structure of the stainless steel seamless steel pipe is austenite at the austenitizing temperature. If the temperature is lower than the first temperature, the microstructure will not be fully austenitic and will not reach the minimum of 90% martensitic steel after quenching. Above 1000 ℃ leads to the growth of austenite grains and to the coarsening of the final structure, which is detrimental to the toughness and high temperature structure stability of the stainless steel seamless steel pipe. The stainless steel seamless steel tube is maintained at the austenitizing temperature for a period of 5 to 45 minutes in order to reach the austenitizing temperature at all positions of the stainless steel seamless steel tube and to make the temperature of the entire stainless steel seamless steel tube uniform. The austenitizing time should not exceed 45 minutes, otherwise austenite grains grow and the final structure becomes coarse, which is also detrimental to the toughness and high temperature structure stability of the stainless steel seamless steel pipe.
And then sending the austenitic stainless steel seamless steel pipe into a quenching machine to be cooled to the ambient temperature so as to obtain the quenched stainless steel seamless steel pipe. Quenching can be carried out in water (water quenching) or in oil (oil quenching). The quenched stainless steel seamless steel pipe contains at least 90% martensite, more preferably at least 95% martensite, and still more preferably at least 99% martensite.
Fourthly, tempering:
feeding the quenched stainless steel seamless steel tube into an argon-oxygen furnace to heat again to a tempering temperature of 500 ℃ to a second temperature at a rate of 135 ℃ to 185 ℃ per minute, then maintaining the stainless steel seamless steel tube at the tempering temperature for a period of 10 minutes to 100 minutes, and then cooling the stainless steel seamless steel tube to ambient temperature to obtain a quenched and tempered stainless steel seamless steel tube.
Tempering must be done at a tempering temperature lower than the second temperature to avoid any phase transformation.
Preferably, the third step is repeated at least once before tempering to achieve double or multiple quenching.
Preferably, the first temperature is determined according to a first formula as follows:
the first temperature 920-.
Further preferably, the second temperature is determined according to the following second formula:
the second temperature is 750 to 10.7 × manganese to 19.6 × nickel to 21.9 × silicon to 19.6 × chromium to 6.83 × copper to 209 × molybdenum, and the unit of the second temperature is ℃.
For example, the stainless seamless steel tube for a high-pressure boiler according to an embodiment of the present invention contains, in mass%, 20% of chromium, 23% of nickel, 4% of molybdenum, 1% of copper, less than 0.02% of carbon, 1% of manganese, 1% of silicon, 0.045% or less of phosphorus, and the balance iron.
Accordingly, the first temperature of 920-,
the second temperature is 750-10.7 × 1% -19.6 × 23% +21.9 × 1% +19.6 × 20% +6.83 × 1% +209 × 4% + 750-0.107-4.508+0.219+3.92+0.0683+8.36 ═ 757.9523 ℃.
In the stainless steel seamless steel tube for a high-pressure boiler according to an embodiment of the present invention, the stainless steel seamless steel tube contains, by mass, 23% of chromium, 30% of nickel, 6% of molybdenum, 3% of copper, less than 0.02% of carbon, 2% of manganese, 1.5% of silicon, less than or equal to 0.045% of phosphorus, and the balance iron;
accordingly, the first temperature is 920-.
The second temperature is 750-10.7 × 2% -19.6 × 30% +21.9 × 1.5% +19.6 × 23% +6.83 × 3% +209 × 6% + 750-0.214-5.88+0.3285+4.508+0.2049+12.54 ═ 761.4874 ℃.
The applicant has, after a number of experiments, unexpectedly found that the elements present in amounts outside the ranges defined in the present invention (i.e. chromium 20% to 23%, nickel 23% to 30%, molybdenum 4% to 6%, copper 1% to 3%, carbon < 0.02%, manganese 1% to 2%, silicon 1% to 1.5%, phosphorus < 0.045, balance iron) and that the first and second temperatures do not correspond to the calculation of the present invention, have a lower yield strength and poorer heat and corrosion resistance than the present invention. In addition, the applicant has also unexpectedly found that the element content is in the range defined by the present invention but the first temperature and the second temperature are not in the calculation way of the present invention, and compared with the present invention, the alloy also has lower yield strength and poorer heat resistance and corrosion resistance, and the high temperature tissue stability and endurance resistance are also deteriorated. More unexpectedly, having the same elemental composition but in a specific content different from that defined in the present invention, while satisfying the way in which the first and second temperatures of the present invention are calculated, also has lower yield strength and inferior heat and corrosion resistance properties compared to the present invention.
The foregoing describes preferred embodiments of the present invention, but is not intended to limit the invention thereto. Modifications and variations of the embodiments disclosed herein may be made by those skilled in the art without departing from the scope and spirit of the invention.
Claims (10)
1. The stainless steel seamless steel tube for the high-pressure boiler is characterized by comprising, by mass, 20% -23% of chromium, 23% -30% of nickel, 4% -6% of molybdenum, 1% -3% of copper, less than 0.02% of carbon, 1% -2% of manganese, 1% -1.5% of silicon, less than or equal to 0.045% of phosphorus and the balance iron.
2. The stainless steel seamless steel tube for a high-pressure boiler according to claim 1, wherein the density of the stainless steel seamless steel tube for a high-pressure boiler is 8.0g/cm3。
3. The stainless seamless steel tube for a high-pressure boiler according to claim 1, wherein the tensile strength σ b of the stainless seamless steel tube for a high-pressure boiler is not less than 520 MPa.
4. The stainless steel seamless steel tube for a high-pressure boiler according to claim 1, wherein an elongation δ of the stainless steel seamless steel tube for a high-pressure boiler is δ ≥ 35%.
5. The manufacturing method of the stainless steel seamless steel tube for the high-pressure boiler is characterized by comprising the following steps of:
firstly, processing stainless steel:
the stainless steel comprises the following chemical components, by mass, 20-23% of chromium, 23-30% of nickel, 4-6% of molybdenum, 1-3% of copper, less than 0.02% of carbon, 1-2% of manganese, 1-1.5% of silicon, less than or equal to 0.045% of phosphorus and the balance of iron;
secondly, primary smelting in an electric furnace:
feeding the stainless steel processed in the first step into an electric furnace, which heats the stainless steel to 1100 ℃ to 1300 ℃ at a rate of 55 ℃ to 85 ℃ per minute; carrying out hot forming on stainless steel heated in an electric furnace through production processes of die casting forming, cogging of a large-caliber reinforced blooming mill and hot continuous rolling at the temperature of 900-1300 ℃ to obtain a stainless steel seamless steel pipe;
thirdly, refining in an argon-oxygen furnace:
cooling the stainless steel seamless steel tube to ambient temperature, then feeding the cooled stainless steel seamless steel tube into an argon-oxygen furnace, heating the stainless steel seamless steel tube to an austenitizing temperature of between a first temperature and 1000 ℃ at a rate of between 135 ℃ and 185 ℃ per minute, and then maintaining the stainless steel seamless steel tube at the austenitizing temperature for a period of between 5 minutes and 45 minutes to obtain an austenitized stainless steel seamless steel tube; then sending the austenitic stainless steel seamless steel pipe into a quenching machine to be cooled to ambient temperature so as to obtain a quenched stainless steel seamless steel pipe;
fourthly, tempering:
feeding the quenched stainless steel seamless steel tube into an argon-oxygen furnace to heat again to a tempering temperature of 500 ℃ to a second temperature at a rate of 135 ℃ to 185 ℃ per minute, then maintaining the stainless steel seamless steel tube at the tempering temperature for a period of 10 minutes to 100 minutes, and then cooling the stainless steel seamless steel tube to ambient temperature to obtain a quenched and tempered stainless steel seamless steel tube.
6. The stainless steel seamless steel tube for a high-pressure boiler according to claim 5, wherein the third step is repeated at least once before the tempering of the fourth step is performed to achieve double or multiple quenching.
7. The seamless stainless steel tube for a high-pressure boiler according to claim 5, wherein the quenched seamless stainless steel tube contains at least 90% of martensite.
8. The seamless stainless steel tube for a high-pressure boiler according to claim 5, wherein the quenched seamless stainless steel tube contains at least 95% of martensite.
9. The method of manufacturing a stainless seamless steel tube for a high-pressure boiler according to claim 5, wherein the first temperature is determined according to a first formula as follows:
the first temperature 920-.
10. The method of manufacturing a stainless seamless steel tube for a high-pressure boiler according to claim 5, wherein the second temperature is determined according to a second formula as follows:
the second temperature is 750 to 10.7 × manganese to 19.6 × nickel to 21.9 × silicon to 19.6 × chromium to 6.83 × copper to 209 × molybdenum, and the second temperature is expressed in units of ℃.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114317922A (en) * | 2021-12-30 | 2022-04-12 | 南阳汉冶特钢有限公司 | Control method for ensuring stable mechanical property of steam drum plate 13MnNiMoR thermal cycle process |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6468450A (en) * | 1987-09-09 | 1989-03-14 | Nippon Kokan Kk | Austenitic stainless steel for seawater corrosion resistance |
| JP2009030153A (en) * | 2007-07-02 | 2009-02-12 | Sumitomo Metal Ind Ltd | Process for production of high alloy steel pipe |
| CN101845600A (en) * | 2009-03-25 | 2010-09-29 | 大连特耐泵业有限公司 | High temperature-resistant and acid corrosion-resistant stainless steel and preparation method thereof |
| CN102510909A (en) * | 2011-11-18 | 2012-06-20 | 住友金属工业株式会社 | Austenitic stainless steel |
| CN103320707A (en) * | 2013-06-20 | 2013-09-25 | 宝山钢铁股份有限公司 | High-strength stainless steel tube with excellent toughness and manufacturing method thereof |
| CN103906584A (en) * | 2011-11-01 | 2014-07-02 | 新日铁住金株式会社 | Seamless-metal-pipe manufacturing method |
| CN104854250A (en) * | 2012-12-12 | 2015-08-19 | 杰富意钢铁株式会社 | Heat treatment equipment line for seamless steel pipe, and method for manufacturing high-strength stainless steel pipe |
| CN104962836A (en) * | 2015-06-05 | 2015-10-07 | 山西太钢不锈钢股份有限公司 | Corrosion-resistance iron-based austenite oil well pipe and manufacturing method thereof |
| CN106555133A (en) * | 2015-09-24 | 2017-04-05 | 宝山钢铁股份有限公司 | A kind of high-strength corrosion-resistant rustless steel, tubing and casing and its manufacture method |
| CN110520549A (en) * | 2017-03-31 | 2019-11-29 | 日铁不锈钢株式会社 | Austenite stainless steel thick steel plate and its manufacturing method |
-
2020
- 2020-08-18 CN CN202010833445.3A patent/CN112853231A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6468450A (en) * | 1987-09-09 | 1989-03-14 | Nippon Kokan Kk | Austenitic stainless steel for seawater corrosion resistance |
| JP2009030153A (en) * | 2007-07-02 | 2009-02-12 | Sumitomo Metal Ind Ltd | Process for production of high alloy steel pipe |
| CN101845600A (en) * | 2009-03-25 | 2010-09-29 | 大连特耐泵业有限公司 | High temperature-resistant and acid corrosion-resistant stainless steel and preparation method thereof |
| CN103906584A (en) * | 2011-11-01 | 2014-07-02 | 新日铁住金株式会社 | Seamless-metal-pipe manufacturing method |
| CN102510909A (en) * | 2011-11-18 | 2012-06-20 | 住友金属工业株式会社 | Austenitic stainless steel |
| CN104854250A (en) * | 2012-12-12 | 2015-08-19 | 杰富意钢铁株式会社 | Heat treatment equipment line for seamless steel pipe, and method for manufacturing high-strength stainless steel pipe |
| CN103320707A (en) * | 2013-06-20 | 2013-09-25 | 宝山钢铁股份有限公司 | High-strength stainless steel tube with excellent toughness and manufacturing method thereof |
| CN104962836A (en) * | 2015-06-05 | 2015-10-07 | 山西太钢不锈钢股份有限公司 | Corrosion-resistance iron-based austenite oil well pipe and manufacturing method thereof |
| CN106555133A (en) * | 2015-09-24 | 2017-04-05 | 宝山钢铁股份有限公司 | A kind of high-strength corrosion-resistant rustless steel, tubing and casing and its manufacture method |
| CN110520549A (en) * | 2017-03-31 | 2019-11-29 | 日铁不锈钢株式会社 | Austenite stainless steel thick steel plate and its manufacturing method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114317922A (en) * | 2021-12-30 | 2022-04-12 | 南阳汉冶特钢有限公司 | Control method for ensuring stable mechanical property of steam drum plate 13MnNiMoR thermal cycle process |
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