CN114635075A - High-strength high-ductility and toughness blade material - Google Patents
High-strength high-ductility and toughness blade material Download PDFInfo
- Publication number
- CN114635075A CN114635075A CN202011479572.4A CN202011479572A CN114635075A CN 114635075 A CN114635075 A CN 114635075A CN 202011479572 A CN202011479572 A CN 202011479572A CN 114635075 A CN114635075 A CN 114635075A
- Authority
- CN
- China
- Prior art keywords
- blade material
- percent
- heat treatment
- equal
- less
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000463 material Substances 0.000 title claims abstract description 51
- 239000012535 impurity Substances 0.000 claims abstract description 18
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 12
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 12
- 229910052758 niobium Inorganic materials 0.000 claims abstract description 12
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 12
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 12
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 12
- 229910052802 copper Inorganic materials 0.000 claims abstract description 10
- 238000010438 heat treatment Methods 0.000 claims description 28
- 230000032683 aging Effects 0.000 claims description 21
- 239000000243 solution Substances 0.000 claims description 12
- 238000003723 Smelting Methods 0.000 claims description 11
- 229910000831 Steel Inorganic materials 0.000 claims description 11
- 238000005242 forging Methods 0.000 claims description 11
- 239000010959 steel Substances 0.000 claims description 11
- 229910052748 manganese Inorganic materials 0.000 claims description 10
- 229910052698 phosphorus Inorganic materials 0.000 claims description 9
- 229910052709 silver Inorganic materials 0.000 claims description 9
- 239000006104 solid solution Substances 0.000 claims description 9
- 229910052718 tin Inorganic materials 0.000 claims description 9
- 238000010891 electric arc Methods 0.000 claims description 8
- 229910052745 lead Inorganic materials 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 7
- 238000003754 machining Methods 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 7
- 239000002994 raw material Substances 0.000 claims description 7
- 238000005098 hot rolling Methods 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 1
- 229910052717 sulfur Inorganic materials 0.000 abstract description 8
- 238000002360 preparation method Methods 0.000 abstract description 2
- 239000011572 manganese Substances 0.000 description 11
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 11
- 239000010955 niobium Substances 0.000 description 11
- 239000010949 copper Substances 0.000 description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 9
- 239000011651 chromium Substances 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 6
- 229910052804 chromium Inorganic materials 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 4
- 239000003921 oil Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 229910001105 martensitic stainless steel Inorganic materials 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000011733 molybdenum Substances 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 238000004881 precipitation hardening Methods 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 2
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009863 impact test Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
- 238000009864 tensile test 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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/02—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass turbine or like blades from one piece
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/004—Heat treatment of ferrous alloys containing Cr and Ni
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/005—Heat treatment of ferrous alloys containing Mn
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/008—Heat treatment of ferrous alloys containing Si
-
- 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
- C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
-
- 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
- C22C38/007—Ferrous alloys, e.g. steel alloys containing silver
-
- 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
- C22C38/008—Ferrous alloys, e.g. steel alloys containing tin
-
- 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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- 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
- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
-
- 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
- C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
-
- 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
- C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/12—Blades
- F01D5/28—Selecting particular materials; Particular measures relating thereto; Measures against erosion or corrosion
-
- 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
- C21D2261/00—Machining or cutting being involved
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention provides a high-strength high-ductility blade material which comprises the following elements in percentage by weight: c: 0.02 to 0.05%, Si: less than or equal to 1.0 percent, Mn: less than or equal to 1.0 percent, P: less than or equal to 0.02%, S: less than or equal to 0.01 percent, Cr: 14.0-16.0%, Ni: 6.0-7.0%, Mo: 0.5-1.2%, Cu: 1.25 to 1.75%, Nb: 8 XC-20 XC%, V: 0.02-0.20%, N: 0.005-0.040%, and the balance of Fe and inevitable impurities. The invention further provides application of the high-strength high-ductility blade material and a preparation method thereof. The high-strength high-ductility and toughness blade material provided by the invention has the advantages that the yield strength is obviously improved while better ductility and toughness are maintained, and the requirements of steam turbine blades requiring higher strength, ductility and toughness can be met.
Description
Technical Field
The invention belongs to the technical field of metal materials, and relates to a high-strength high-ductility and toughness blade material.
Background
In the national standard GB/T8732-2014, the blade material with the highest strength and the best plasticity and toughness is precipitation hardening martensitic stainless steel 05Cr17Ni4Cu4Nb, but the yield strength Rp0.2 is 890-980 MPa, the tensile strength Rm is 950-1020 MPa, and the requirement of longer low-pressure last-stage blades of the steam turbine on the material strength still cannot be met. At present, other high-strength blade materials are also developed at home and abroad, but the plasticity and toughness of the materials can not meet the safety design requirement of longer blades of steam turbines. Therefore, a steam turbine blade material with higher strength and better ductility and toughness has to be developed.
Disclosure of Invention
In view of the above-mentioned disadvantages of the prior art, it is an object of the present invention to provide a high-strength high-ductility blade material for improving the strength, ductility and ductility of the prior art turbine blade material.
In order to achieve the above objects and other related objects, a first aspect of the present invention provides a high-strength and high-ductility blade material, which is composed of the following elements by weight:
c (carbon): 0.02 to 0.05%, Si (silicon): less than or equal to 1.0 percent, Mn (manganese): less than or equal to 1.0 percent, P (phosphorus): less than or equal to 0.02 percent, S (sulfur): less than or equal to 0.01 percent, Cr (chromium): 14.0 to 16.0%, Ni (nickel): 6.0-7.0%, Mo (molybdenum): 0.5 to 1.2%, Cu (copper): 1.25 to 1.75%, Nb (niobium): 8 XC-20 XC%, V (vanadium): 0.02 to 0.20%, N (nitrogen): 0.005-0.040%, the rest is Fe (iron) and inevitable impurities.
The above-mentioned 8 XC to 20 XC% means that the content of Nb (niobium) is 8 to 20 times the content of C.
Preferably, the high-strength high-ductility and toughness blade material consists of the following elements in percentage by weight:
c (carbon): 0.02 to 0.05%, Si (silicon): 0.2 to 0.6%, Mn (Mn): 0.2 to 0.8%, P (phosphorus): less than or equal to 0.02 percent, S (sulfur): less than or equal to 0.01 percent, Cr (chromium): 14.0 to 16.0%, Ni (nickel): 6.2-6.8%, Mo (molybdenum): 0.5 to 1.0%, Cu (copper): 1.35 to 1.75%, Nb (niobium): 8 XC-15 XC%, V (vanadium): 0.02 to 0.10%, N (nitrogen): 0.005-0.030%, and the balance of Fe (iron) and inevitable impurities.
The above-mentioned 8 XC to 20 XC% means that the content of Nb (niobium) is 8 to 15 times the content of C.
Preferably, the impurities are selected from one or more elements of Al (aluminum), Sn (tin), Ag (silver), Pb (lead).
The inevitable impurities are trace impurity elements which are inevitably contaminated in the blade smelting process.
More preferably, the content of the elements in the impurities by weight percent meets the following requirements:
Al：≤0.03％，Sn：≤0.10％，Ag：≤0.01％，Pb：≤0.01％。
the second aspect of the invention provides the use of the high-strength high-ductility blade material in a turbine blade.
The third aspect of the invention provides a preparation method of a high-strength high-plasticity and toughness blade material, which comprises the steps of taking raw materials according to the element proportion, mixing the raw materials, smelting and remelting the raw materials into a steel ingot, forging the steel ingot into a blank, and then carrying out heat treatment and machining on the blank to provide the blade material.
Preferably, the smelting is electric arc furnace smelting.
More preferably, the electric arc furnace smelting is alkaline electric arc furnace smelting. The alkaline electric arc furnace smelting is a conventional electric arc furnace smelting process.
Preferably, the remelting is selected from one of electroslag remelting or vacuum consumable remelting. The electroslag remelting or vacuum consumable remelting is a conventional remelting process.
Preferably, the forging is selected from one or more of hot rolling, free forging or die forging. The above hot rolling, free forging or die forging is a conventional forging process.
Preferably, the heat treatment is sequentially performed by solution heat treatment and aging heat treatment, and the conditions of the solution heat treatment are as follows: the solid solution temperature is 1020-1050 ℃, the solid solution time is 1.5-2.5h, and oil cooling or strong air cooling is carried out; the aging heat treatment conditions are as follows: the aging temperature is 465 and 495 ℃, the aging time is 8.5-9.5h, and the air cooling is carried out.
The solution heat treatment and the aging heat treatment can improve the comprehensive mechanical property of the blank. The solution heat treatment is similar to a quenching treatment. The aging heat treatment is similar to a tempering treatment.
The machining is a conventional machining process, and the blank can be machined into blades with different shapes.
As mentioned above, compared with the existing blade material such as 05Cr17Ni4Cu4Nb, the blade material with high strength and high ductility and toughness provided by the invention has the advantages that the content of Mn and Ni elements in the formula is increased, the content of Cu elements is reduced, alloy elements Mo, V and N are added, and meanwhile, elements such as C, Si, Mn, P, S, Sn, Ag, Pb and the like are further limited, so that the yield strength is remarkably improved while the blade material keeps better ductility and toughness, and can reach more than 1160 MPa. The blade material can meet the requirements of the turbine blade requiring higher strength, plasticity and toughness.
Detailed Description
The present invention is further illustrated below with reference to specific examples, which are intended to be illustrative only and not to limit the scope of the invention.
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.
Example 1
Taking the components according to the mixture ratio, as shown in table 1, each component consists of the following elements in percentage by weight:
c: 0.03%, Si: 0.3%, Mn: 0.4%, P: 0.01%, S: 0.001%, Cr: 14.5%, Ni: 6.3%, Mo: 0.7%, Cu: 1.40%, Nb: 0.35%, V: 0.05%, N: 0.014%, the balance being Fe and unavoidable impurities.
Wherein, as shown in table 2, the weight percentage content of the elements in the impurities is:
Al：0.004％，Sn：0.01％，Ag：0.001％，Pb：0.001％。
the raw materials are taken according to the proportion of the elements, mixed, smelted by an alkaline arc furnace, remelted into a steel ingot by electroslag, and the steel ingot is freely forged into a round bar blank. And then carrying out solution heat treatment and aging heat treatment on the blank in sequence, wherein the conditions of the solution heat treatment are as follows: the solid solution temperature is 1038 ℃, the solid solution time is 2 hours, and the oil is cooled; the aging heat treatment conditions are as follows: and the aging temperature is 482 ℃, the aging time is 9 hours, and the air cooling is carried out. And finally, machining to obtain a blade material sample No. 1.
Example 2
Taking the components according to the mixture ratio, as shown in table 1, each component consists of the following elements in percentage by weight:
c: 0.05%, Si: 0.5%, Mn: 0.6%, P: 0.01%, S: 0.002%, Cr: 15.0%, Ni: 6.7%, Mo: 0.9%, Cu: 1.65%, Nb: 0.50%, V: 0.08%, N: 0.027%, the balance being Fe and unavoidable impurities.
Wherein, as shown in table 2, the weight percentage content of the elements in the impurities is:
Al：0.02％，Sn：0.01％，Ag：0.005％，Pb：0.003％。
the raw materials are taken according to the above element proportion and mixed, the mixture is smelted by an alkaline electric arc furnace, the smelted mixture is remelted into a steel ingot by vacuum consumable melting, the steel ingot is freely forged into a round bar blank, and then the round bar blank is die forged into a blade blank. And then carrying out solution heat treatment and aging heat treatment on the blank in sequence, wherein the conditions of the solution heat treatment are as follows: the solid solution temperature is 1025 ℃, the solid solution time is 2 hours, and the oil is cold; the aging heat treatment conditions are as follows: and (4) air cooling, wherein the aging temperature is 475 ℃, the aging time is 9 h. And finally, machining to obtain a blade material sample No. 2.
Example 3
Taking the components according to the mixture ratio, as shown in table 1, each component consists of the following elements in percentage by weight:
c: 0.05%, Si: 0.4%, Mn: 0.5%, P: 0.01%, S: 0.001%, Cr: 15.5%, Ni: 6.5%, Mo: 1.0%, Cu: 1.50%, Nb: 0.45%, V: 0.12%, N: 0.033% and the balance Fe and inevitable impurities.
Wherein, as shown in table 2, the weight percentage content of the elements in the impurities is:
Al：0.01％，Sn：0.01％，Ag：0.005％，Pb：0.003％。
the raw materials are taken according to the proportion of the elements, mixed, smelted by an alkaline electric arc furnace, remelted into a steel ingot by vacuum consumable melting, and the steel ingot is hot rolled into a flat steel blank. And then carrying out solution heat treatment and aging heat treatment on the blank in sequence, wherein the conditions of the solution heat treatment are as follows: the solid solution temperature is 1045 ℃, the solid solution time is 2 hours, and the oil is cold; the aging heat treatment conditions are as follows: and (4) cooling in air at the aging temperature of 490 ℃ for 9 h. And finally, machining to obtain a blade material sample No. 3.
Comparative example 1
According to the national standard GB/T8732-2014, precipitation hardening martensitic stainless steel 05Cr17Ni4Cu4Nb is prepared to be used as a blade material, and a blade material sample 1 is obtained. The elemental composition of sample 1 of the vane material is shown in tables 1 and 2.
Comparing the blade material sample 1 with the blade material samples 1# to 3#, it can be seen that the blade material samples 1# to 3# increase the content of Mn and Ni elements, reduce the content of Cu elements, add alloy elements Mo, V and N, and further limit elements such as C, Si, Mn, P, S, Sn, Ag and Pb.
Table 1 essential element contents (wt.%) of the samples in examples 1 to 3 and comparative example 1
Table 2 impurity element contents (wt.%) of the samples in examples 1 to 3 and comparative example 1
| Element name | Example 1 | Example 2 | Example 3 | Comparative example 1 (05Cr17Ni4Cu4Nb) |
| Al | 0.004 | 0.02 | 0.01 | 0.02 |
| Sn | 0.01 | 0.01 | 0.01 | 0.015 |
| Ag | 0.001 | 0.005 | 0.003 | 0.005 |
| Pb | 0.001 | 0.003 | 0.001 | 0.003 |
Test example 1
Samples from No. 1 to No. 3 of the blade material samples prepared in examples 1 to 3 of the present invention were sampled, and room temperature tensile and impact tests were performed on the samples according to GB/T228.1 and GB/T229 standards, respectively, as compared with the sample 1 of the blade material in comparative example 1, and the test results are shown in Table 3. As can be seen from Table 3, the yield strength Rp0.2 and the tensile strength Rm of the blade material samples 1# to 3# prepared in the embodiments 1 to 3 of the invention are much higher than those of the blade material sample 1 x, and the yield strength can reach 1160MPa or more. Meanwhile, the elongation after fracture A, the reduction of area Z and the impact toughness KV2 of the blade material samples No. 1-3 prepared in the embodiments 1-3 of the invention are also higher than those of the existing blade material, and the requirements of the turbine blade requiring higher strength, plasticity and toughness can be met.
TABLE 3 mechanical Properties of samples of blade Material
| Rp0.2/MPa | Rm/MPa | A/％ | Z/％ | KV2 | |
| Example 1 | 1193 | 1253 | 20 | 72 | 140 |
| Example 2 | 1206 | 1284 | 19 | 65 | 96 |
| Example 3 | 1210 | 1290 | 17 | 60 | 90 |
| Comparative example 1 | 965 | 1005 | 17 | 63 | 80 |
In conclusion, the high-strength high-ductility and toughness blade material provided by the invention has the advantages that the yield strength is obviously improved while better plasticity and toughness are maintained, and the requirements of turbine blades requiring higher strength, plasticity and toughness can be met. Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Those skilled in the art can modify or change the above-described embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (10)
1. A blade material is composed of the following elements in percentage by weight:
c: 0.02 to 0.05%, Si: less than or equal to 1.0 percent, Mn: less than or equal to 1.0 percent, P: less than or equal to 0.02 percent, S: less than or equal to 0.01 percent, Cr: 14.0-16.0%, Ni: 6.0-7.0%, Mo: 0.5-1.2%, Cu: 1.25 to 1.75%, Nb: 8 XC-20 XC%, V: 0.02-0.20%, N: 0.005-0.040%, the rest is Fe and inevitable impurities.
2. The blade material as claimed in claim 1, wherein the blade material is composed of the following elements in weight percent:
c: 0.02 to 0.05%, Si: 0.2-0.6%, Mn: 0.2-0.8%, P: less than or equal to 0.02 percent, S: less than or equal to 0.01 percent, Cr: 14.0-16.0%, Ni: 6.2-6.8%, Mo: 0.5 to 1.0%, Cu: 1.35-1.75%, Nb: 8 XC to 15 XC%, V: 0.02-0.10%, N: 0.005-0.030%, and the balance of Fe and inevitable impurities.
3. A blade material according to claim 1, characterized in that the impurities are selected from one or more elements of Al, Sn, Ag, Pb.
4. A blade material according to claim 3, wherein the content of elements in the impurities in percentage by weight meets the following requirements:
Al：≤0.03％，Sn：≤0.10％，Ag：≤0.01％，Pb：≤0.01％。
5. use of a blade material according to any one of claims 1-4 in a steam turbine blade.
6. The method for preparing a blade material according to any one of claims 1 to 4, comprising the steps of mixing the raw materials according to the element proportion, smelting and remelting the mixture into a steel ingot, forging the steel ingot into a blank, and performing heat treatment and machining on the blank to provide the blade material.
7. The method for preparing a blade material according to claim 6, wherein the smelting is electric arc furnace smelting.
8. A method of manufacturing a blade material according to claim 6, wherein the remelting is selected from one of electroslag remelting or vacuum consumable remelting.
9. The method for preparing a blade material according to claim 6, wherein the forging is selected from one or more of hot rolling, free forging and die forging.
10. The method for preparing a blade material according to claim 6, wherein the heat treatment is sequentially performed by a solution heat treatment and an aging heat treatment, and the conditions of the solution heat treatment are as follows: the solid solution temperature is 1020-; the aging heat treatment conditions are as follows: the aging temperature is 465 and 495 ℃, the aging time is 8.5-9.5h, and the air cooling is carried out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011479572.4A CN114635075A (en) | 2020-12-15 | 2020-12-15 | High-strength high-ductility and toughness blade material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011479572.4A CN114635075A (en) | 2020-12-15 | 2020-12-15 | High-strength high-ductility and toughness blade material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114635075A true CN114635075A (en) | 2022-06-17 |
Family
ID=81945367
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011479572.4A Pending CN114635075A (en) | 2020-12-15 | 2020-12-15 | High-strength high-ductility and toughness blade material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114635075A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2022538131A (en) * | 2020-04-29 | 2022-08-31 | 鋼鉄研究総院 | High-strength stainless steel rotor and manufacturing method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1582342A (en) * | 2001-06-01 | 2005-02-16 | 住友金属工业株式会社 | Martensitic stainless steel |
| US20060118215A1 (en) * | 2004-12-08 | 2006-06-08 | Yuichi Hirakawa | Precipitation hardened martensitic stainless steel, manufacturing method therefor, and turbine moving blade and steam turbine using the same |
| CN101210304A (en) * | 2006-12-27 | 2008-07-02 | 沈阳鼓风机(集团)有限公司 | Martensite precipitation hardening stainless steel for compressor impeller and preparation method thereof |
| CN105886949A (en) * | 2016-04-14 | 2016-08-24 | 四川六合锻造股份有限公司 | High-performance heat resistant steel, and preparation method and application thereof |
| CN109355581A (en) * | 2018-10-26 | 2019-02-19 | 上海电气电站设备有限公司 | A kind of turbine blade and bolt heat resisting steel |
-
2020
- 2020-12-15 CN CN202011479572.4A patent/CN114635075A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1582342A (en) * | 2001-06-01 | 2005-02-16 | 住友金属工业株式会社 | Martensitic stainless steel |
| US20060118215A1 (en) * | 2004-12-08 | 2006-06-08 | Yuichi Hirakawa | Precipitation hardened martensitic stainless steel, manufacturing method therefor, and turbine moving blade and steam turbine using the same |
| CN101210304A (en) * | 2006-12-27 | 2008-07-02 | 沈阳鼓风机(集团)有限公司 | Martensite precipitation hardening stainless steel for compressor impeller and preparation method thereof |
| CN105886949A (en) * | 2016-04-14 | 2016-08-24 | 四川六合锻造股份有限公司 | High-performance heat resistant steel, and preparation method and application thereof |
| CN109355581A (en) * | 2018-10-26 | 2019-02-19 | 上海电气电站设备有限公司 | A kind of turbine blade and bolt heat resisting steel |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2022538131A (en) * | 2020-04-29 | 2022-08-31 | 鋼鉄研究総院 | High-strength stainless steel rotor and manufacturing method thereof |
| JP7236569B2 (en) | 2020-04-29 | 2023-03-09 | 鋼鉄研究総院 | High-strength stainless steel rotor and manufacturing method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6111763B2 (en) | Steam turbine blade steel with excellent strength and toughness | |
| CN109811252B (en) | High-strength martensitic stainless steel and manufacturing process thereof | |
| CN109735777B (en) | Anti-oxidation hot-work die steel and preparation method thereof | |
| CN106756509B (en) | A kind of high-temperature alloy structural steel and its Technology for Heating Processing | |
| CN114411043B (en) | Preparation method of large hot forging hot work die steel | |
| CN114107839A (en) | Low-alloy cast steel, heat treatment method thereof and application thereof in railway industry | |
| JP2017508882A5 (en) | ||
| WO2021208181A1 (en) | Low-temperature, high-toughness, high-temperature, high-intensity and high-hardenability hot mold steel and preparation method therefor | |
| CN111519093A (en) | Low-temperature-resistant high-strength martensitic stainless steel forging material | |
| CN114134431B (en) | 2000 Mpa-grade high-strength high-toughness high-hardenability spring steel by square billet continuous casting and rolling and manufacturing method thereof | |
| CN114214567A (en) | Ni3Al intermetallic compound precipitation-strengthened high-temperature bearing steel and preparation method thereof | |
| CN106566953A (en) | Corrosion-resisting alloy forge piece and production method thereof | |
| CN106566952A (en) | High temperature resistance forge piece with excellent nuclear power performance and production method thereof | |
| CN114635075A (en) | High-strength high-ductility and toughness blade material | |
| CN113774270A (en) | High-strength high-toughness precipitation hardening stainless steel bar and preparation method thereof | |
| CN114196875B (en) | Stainless steel for valve plate and heat treatment method thereof | |
| CN112281053B (en) | SiMnCrNiMo low-carbon martensitic steel, drilling machine hoisting ring and manufacturing method thereof | |
| CN111647797B (en) | High-speed tool steel and steel heat treatment method thereof | |
| CN113774269A (en) | Ultrahigh-strength stainless steel bar for structural member and preparation method thereof | |
| CN111101080A (en) | High-temperature-resistant die steel and manufacturing method thereof | |
| CN115595504B (en) | High-strength high-toughness maraging stainless steel for ultralow-temperature engineering and manufacturing method thereof | |
| CN103924156B (en) | A kind of cupric strengthening steel and preparation method adding nanoparticle | |
| CN118256697B (en) | Nitrogen-containing martensitic stainless bearing steel and preparation method thereof | |
| CN111647795B (en) | Cold-rolled die steel and preparation method thereof | |
| CN116043106B (en) | High-purity high-toughness long-service-period cold work die steel and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220617 |
|
| RJ01 | Rejection of invention patent application after publication |