CN104831160B - For 630 DEG C of ultra-supercritical turbine blade containing Re Steel material and manufacture method thereof - Google Patents
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Abstract
For 630 DEG C of ultra-supercritical turbine blade containing Re Steel material and manufacture method thereof, it relates to a kind of containing Re Steel material and manufacture method thereof.The invention aims to solve the turbine blade made of current material and have that cost is high and difficulty of processing is big, problem Thermal Fatigue Damage easily occur.Present invention chemical composition by weight percentage is: below C+N:0.20%；Below Si:0.20%；Below Mn:0.60%；Below Ni:0.7%；Mo+W:2.20～less than 3.20%, other chemical composition is by V+Nb or Ta, Co, Re≤0.30% and B；Surplus is impurity.Manufacture method in the present invention includes that six steps respectively take the just refining in electric furnace or vaccum sensitive stove of required element；Electric slag refusion and smelting；Heats forged or rolling；Heat treatment；Process containing Re Steel material solid object surface；Pick test mechanical property.The present invention is in ultra-supercritical turbine blade.
Description
Technical field
Present invention relates particularly to a kind of for 630 DEG C of ultra-supercritical turbine blade containing Re Steel material and manufacture method thereof.
Background technology
Steam turbine is the rotary power machinery that the energy of steam is converted into mechanical power.Also known as steam turbine.It is mainly used as
Prime mover of generating, it is possible to directly drive various pumps, blower fan, compressor and propeller for vessels etc..Steamer can also be utilized
The steam discharge of machine or intermediate extraction meet production and heat supply needs in life.
Turbine blade is acted on by high temperature and high pressure steam, subjects bigger moment of flexure in work, the movable vane in running up
Sheet still suffers from the highest centrifugal force；It is in the blade in Shi Yanqi district, particularly final stage, electrochemical corrosion to be stood and water droplet
Erosion. moving vane still suffers from the most complicated exciting force.Therefore, blade steel should meet claimed below: have enough room temperature,
Mechanical behavior under high temperature and the anti-degeneration energy that walks slowly like a woman；There is high anti-vibration damping capacity；High structure stability；Good corrosion-resistant and
Erosion resistance；Good processing performance.Turbine blade wide variety, wherein 630 DEG C of ultra-supercritical turbine blade need
Require that the material using high-temperature behavior high-quality is made.The most employing high temperature alloys manufacture this kind of blade.Use height
Temperature alloy not only considerably increases the cost of raw material of unit, and brings the biggest difficulty to the processing of blade.
Summary of the invention
It is an object of the invention to provide a kind of for 630 DEG C of ultra-supercritical turbine blade containing Re Steel material and manufacturer thereof
Method, there is cost height in the turbine blade made to solve current material and difficulty of processing is big, asking of Thermal Fatigue Damage easily occurs
Topic.
The present invention solves that above-mentioned technical problem adopts the technical scheme that:
A kind of for 630 DEG C of ultra-supercritical turbine blade containing Re Steel material, its chemical composition by weight percentage is:
Below C+N:0.20%；Below Si:0.20%；Below Mn:0.60%；Below Ni:0.7%；Mo+W:2.20～
Less than 3.20%；V+Nb or Ta:0.15～0.40%；Co:0.5～2.00%；Re≤0.30%；Below B:0.015；
Surplus is Fe and impurity, and described impurity is:
P≤0.015%；S≤0.005%；Cu≤0.15%.
The manufacture method containing Re Steel material for 630 DEG C of ultra-supercritical turbine blade as described in detailed description of the invention one,
It comprises the steps:
Step one: take the just refining in electric furnace or vaccum sensitive stove of the preparation required element containing Re Steel material；In fusion process
Regulate the content of each element so that it is weight ratio meets design requirement, control the content of impurity element；
Step 2: remelting refining in electroslag furnace, reduces the content of impurity element so that it is meet design requirement further, system
Become ESR ingot；
Step 3: by ESR ingot heats forged or be rolled into containing Re Steel material entity；
Step 4: Re Steel material entity is carried out heat treatment of annealing: step and technological parameter are as follows:
Re Steel material entity will be contained and be heated to 760 DEG C, and after being incubated 4 hours, be cooled to 680 DEG C in the lehr and be incubated
After 12～20 hours, air cooling of coming out of the stove；
Step 5: process containing Re Steel material solid object surface: the Steel material entity containing Re is carried out surface grinding or car optical processing,
Eliminate surface defect and make rod iron size, shape, surface quality meet design requirement, preparing the finished product containing Re Steel material；
Step 6: pick test mechanical property on the finished product containing Re Steel material, carries out tensile test at room temperature and high-temperature and durable
Test；
Sample heat treatment, step and technological parameter are as follows:
Quenching: heating-up temperature 1100～1140 DEG C；The type of cooling: oil is cold or dries cold
Tempering: heating-up temperature 660～700 DEG C, time 2～4 hours；The type of cooling: air cooling
Mechanical performance index should reach as follows:
Tensile strength: σ b >=930N/mm2
Yield strength: σ 0.2 >=750N/mm2
Percentage elongation: δ >=15%
The contraction percentage of area: ψ >=45%
Stress-rupture tester:
Experiment condition: temperature 650 DEG C；Stress 245N/mm2
Rupture time T >=300 hour.
Present invention beneficial effect compared with prior art:
1, the present invention passes through adjustment member chemical composition, optimizes design heat treatment process parameter, improves containing Re Steel material
Ambient temperature mechanical properties, and under this technique, carried out enduring quality test during 10,000 hours long, obtained by L-M curve
The material at high temperature performance arrived up to 630 DEG C, the creep rupture strength of 100,000 hours be more than 100MPa, fully meet 630 DEG C super
The use requirement of critical steam turbine blade.And the Steel material containing Re prepared by the present invention ensure that thermal coefficient of expansion with
Rotor steel is suitable, and the average coefficient of linear expansion of room temperature to 650 DEG C is 12.0 × 10-6/ DEG C～12.5 × 10-6/ DEG C between, pass through
The heat exhaustion containing the opposing of Re Steel material prepared by the present invention is effective, does not haves Thermal Fatigue Damage phenomenon.
2, manufacture process of the present invention is simple, and easy to operate, preparation cost is cheap, and compared with prior art cost reduces 50%,
Preparation efficiency compared with prior art improves 30%.
Detailed description of the invention
Detailed description of the invention one: in this detailed description of the invention for 630 DEG C of ultra-supercritical turbine blade containing Re Steel material
Chemical composition by weight percentage is:
Below C+N:0.20%；Below Si:0.20%；Below Mn:0.60%；Below Ni:0.7%；Mo+W:2.20～
Less than 3.20%；V+Nb or Ta:0.15～0.40%；Co:0.5～2.00%；Re≤0.30%；Below B:0.015；
Surplus is Fe and impurity, and described impurity is: P≤0.015%；S≤0.005%；Cu≤0.15%.Containing Re in the present invention
The performance of Steel material and index be: 630 DEG C, 105h creep rupture strength is more than 100MPa；The average line of room temperature to 650 DEG C
The coefficient of expansion is 12.0 × 10-6/ DEG C～12.5 × 10-6/ DEG C between.
Detailed description of the invention two: in this detailed description of the invention for 630 DEG C of ultra-supercritical turbine blade containing Re Steel material
Chemical composition by weight percentage is: below C:0.14%, below N:0.05% or to meet C+N:0.20% claimed below,
Below Si:0.20%, below Mn:0.60%, below Ni:0.7%, Mo+W:2.20～less than 3.20%, V+Nb or
Ta:0.15～0.40%, Co:0.5～2.00%, Re :≤0.30%, below B:0.015.Present embodiment does not carries
And identical with detailed description of the invention one.
Detailed description of the invention three: in this detailed description of the invention for 630 DEG C of ultra-supercritical turbine blade containing Re Steel material
Chemical composition by weight percentage is: below C:0.14%, below Si:0.20%, below Mn:0.60%, Ni:0.7%
Hereinafter, below W:2.8%, below Mo:0.30%, or meet the requirement of Mo+W:2.20～less than 3.20%, V+Nb
Or Ta:0.15～0.40%, Co:0.5～2.00%, Re :≤0.30%, below B:0.015.In present embodiment not mentioned
Identical with detailed description of the invention one.
Detailed description of the invention four: in this detailed description of the invention for 630 DEG C of ultra-supercritical turbine blade containing Re Steel material
Chemical composition by weight percentage is: below C+N:0.20%, below Si:0.20%, below Mn:0.60%, Ni:0.7%
Hereinafter, Mo+W:2.20～less than 3.20%, below V:0.22%, Nb or below Ta:0.15%, or meet V+Nb
Or the condition of Ta:0.15～0.40%, Co:0.5～2.00%, Re :≤0.30%, below B:0.015.This embodiment party
In formula NM identical with detailed description of the invention one.
Detailed description of the invention five: the manufacture method in present embodiment comprises the steps:
Step one: take the just refining in electric furnace or vaccum sensitive stove of the preparation required element containing Re Steel material；In fusion process
Regulate the content of each element so that it is weight ratio meets design requirement, control the content of impurity element；
Step 2: remelting refining in electroslag furnace, reduces the content of impurity element so that it is meet design requirement further, system
Become ESR ingot；
Step 3: by ESR ingot heats forged or be rolled into containing Re Steel material entity；
Step 4: Re Steel material entity is carried out heat treatment of annealing: step and technological parameter are as follows:
Re Steel material entity will be contained and be heated to 760 DEG C, and after being incubated 4 hours, be cooled to 680 DEG C in the lehr and be incubated
After 12～20 hours, air cooling of coming out of the stove；
Step 5: process containing Re Steel material solid object surface: the Steel material entity containing Re is carried out surface grinding or car optical processing,
Eliminate surface defect and make rod iron size, shape, surface quality meet design requirement, preparing the finished product containing Re Steel material；
Step 6: pick test mechanical property on the finished product containing Re Steel material, carries out tensile test at room temperature and high-temperature and durable
Test；
Sample heat treatment, step and technological parameter are as follows:
Quenching: heating-up temperature 1100～1140 DEG C；The type of cooling: oil is cold or dries cold
Tempering: heating-up temperature 660～700 DEG C, time 2～4 hours；The type of cooling: air cooling
Mechanical performance index should reach as follows:
Tensile strength: σ b >=930N/mm2
Yield strength: σ 0.2 >=750N/mm2
Percentage elongation: δ >=15%
The contraction percentage of area: ψ >=45%
Stress-rupture tester:
Experiment condition: temperature 650 DEG C；Stress 245N/mm2
Rupture time T >=300 hour.
In present embodiment, in step one, the preparation required element containing Re Steel material is below C+N:0.20%；Si:0.20%
Below；Below Mn:0.60%；Below Ni:0.7%；Mo+W:2.20～less than 3.20%；V+Nb or Ta:0.15～
0.40%；Co:0.5～2.00%；Re≤0.30%；Below B:0.015；The content reducing impurity element in step 2 is
P≤0.015%；S≤0.005%；Cu≤0.15%.In present embodiment preparation the finished product containing Re Steel material 630 DEG C,
Test period is more than 100MPa in the creep rupture strength of 105h；The average coefficient of linear expansion of room temperature to 650 DEG C 12.0 ×
10-6/ DEG C～12.5 × 10-6/ DEG C between.
Detailed description of the invention six: prepare in step one in present embodiment and contain the required elementary composition for C+N of Re Steel material:
Less than 0.20%；Below Si:0.20%；Below Mn:0.60%；Below Ni:0.7%；Mo+W:2.20～3.20% with
Under；V+Nb or Ta:0.15～0.40%；Co:0.5～2.00%；Re≤0.30%；Below B:0.015.
Detailed description of the invention seven: reduce the content of impurity element in present embodiment in rapid two further extremely: P≤0.015%；
S≤0.005%；Cu≤0.15%.
Employing following example checking beneficial effects of the present invention:
Embodiment one: the manufacture method in the present embodiment comprises the steps:
Step one: take the just refining in electric furnace or vaccum sensitive stove of required element；The content of each element is regulated in fusion process,
Make its weight ratio meet design requirement, control the content of impurity element；
Step 2: remelting refining in electroslag furnace, reduces the content of impurity element so that it is meet design requirement further, system
Become ESR ingot；
Step 3: by ESR ingot heats forged or be rolled into containing Re Steel material entity；
Step 4: Re Steel material entity is carried out heat treatment of annealing: step and technological parameter are as follows:
Re Steel material entity will be contained and be heated to 760 DEG C, and after being incubated 4 hours, be cooled to 680 DEG C in the lehr and be incubated
After 15 hours, air cooling of coming out of the stove；
Step 5: process containing Re Steel material solid object surface: the Steel material entity containing Re is carried out surface grinding or car optical processing,
Eliminate surface defect and make rod iron size, shape, surface quality meet design requirement, preparing the finished product containing Re Steel material；
Step 6: pick test mechanical property on the finished product containing Re Steel material, carries out tensile test at room temperature and high-temperature and durable
Test；
Sample heat treatment, step and technological parameter are as follows:
Quenching: heating-up temperature 1120 DEG C；The type of cooling: oil is cold or dries cold
Tempering: heating-up temperature 680 DEG C, 2.5 hours time；The type of cooling: air cooling
Mechanical performance index should reach as follows:
Tensile strength: σ b >=930N/mm2
Yield strength: σ 0.2 >=750N/mm2
Percentage elongation: δ >=15%
The contraction percentage of area: ψ >=45%
Stress-rupture tester:
Experiment condition: temperature 650 DEG C；Stress 245N/mm2
Rupture time T >=300 hour.
The finished product containing Re Steel material in the present embodiment 630 DEG C, test period is 105The creep rupture strength of h is more than 100MPa；
The average coefficient of linear expansion of room temperature to 650 DEG C is 12.2 × 10-6/℃.NM and detailed description of the invention five in the present embodiment
Identical.
Embodiment two: the manufacture method in the present embodiment comprises the steps:
Step one: take the just refining in electric furnace or vaccum sensitive stove of required element；The content of each element is regulated in fusion process,
Make its weight ratio meet design requirement, control the content of impurity element；
Step 2: remelting refining in electroslag furnace, reduces the content of impurity element so that it is meet design requirement further, system
Become ESR ingot；
Step 3: by ESR ingot heats forged or be rolled into containing Re Steel material entity；
Step 4: Re Steel material entity is carried out heat treatment of annealing: step and technological parameter are as follows:
Re Steel material entity will be contained and be heated to 760 DEG C, and after being incubated 4 hours, be cooled to 680 DEG C in the lehr and be incubated
After 18 hours, air cooling of coming out of the stove；
Step 5: process containing Re Steel material solid object surface: the Steel material entity containing Re is carried out surface grinding or car optical processing,
Eliminate surface defect and make rod iron size, shape, surface quality meet design requirement, preparing the finished product containing Re Steel material；
Step 6: pick test mechanical property on the finished product containing Re Steel material, carries out tensile test at room temperature and high-temperature and durable
Test；
Sample heat treatment, step and technological parameter are as follows:
Quenching: heating-up temperature 1130 DEG C；The type of cooling: oil is cold or dries cold
Tempering: heating-up temperature 680 DEG C, 3 hours time；The type of cooling: air cooling
Mechanical performance index should reach as follows:
Tensile strength: σ b >=930N/mm2
Yield strength: σ 0.2 >=750N/mm2
Percentage elongation: δ >=15%
The contraction percentage of area: ψ >=45%
Stress-rupture tester:
Experiment condition: temperature 650 DEG C；Stress 245N/mm2
Rupture time T >=300 hour.
The finished product containing Re Steel material in the present embodiment 630 DEG C, test period is 105The creep rupture strength of h is more than 100MPa；
The average coefficient of linear expansion of room temperature to 650 DEG C is 12.4 × 10-6/℃.NM and detailed description of the invention five in the present embodiment
Identical.
Claims (4)
1. one kind for 630 DEG C of ultra-supercritical turbine blade containing Re Steel material, it is characterised in that: super for 630 DEG C
The chemical composition by weight percentage containing Re Steel material of critical steam turbine blade is:
Below C+N:0.20%；Below Si:0.20%；Below Mn:0.60%；Below Ni:0.7%；Mo+W:2.20～
Less than 3.20%；V+Nb or Ta:0.15～0.40%；Co:0.5～2.00%；Re≤0.30%；Below B:0.015；
Surplus is Fe and impurity, and described impurity is:
P≤0.015%；S≤0.005%；Cu≤0.15%.
2. the manufacture method containing Re Steel material for 630 DEG C of ultra-supercritical turbine blade as claimed in claim 1,
It is characterized in that: it comprises the steps:
Step one: take the just refining in electric furnace or vaccum sensitive stove of the preparation required element containing Re Steel material；Fusion process is adjusted
Save the content of each element so that it is weight ratio meets design requirement, control the content of impurity element；
Step 2: remelting refining in electroslag furnace, reduces the content of impurity element so that it is meet design requirement further, system
Become ESR ingot；
Step 3: by ESR ingot heats forged or be rolled into containing Re Steel material entity；
Step 4: Re Steel material entity is carried out heat treatment of annealing: step and technological parameter are as follows:
Re Steel material entity will be contained and be heated to 760 DEG C, after being incubated 4 hours, be cooled in the lehr 680 DEG C and be incubated 12～
After 20 hours, air cooling of coming out of the stove；
Step 5: process containing Re Steel material solid object surface: the Steel material entity containing Re is carried out surface grinding or car optical processing,
Eliminate surface defect and make rod iron size, shape, surface quality meet design requirement, preparing the finished product containing Re Steel material；
Step 6: pick test mechanical property on the finished product containing Re Steel material, carries out tensile test at room temperature and high-temperature and durable examination
Test；
Sample heat treatment, step and technological parameter are as follows:
Quenching: heating-up temperature 1100～1140 DEG C；The type of cooling: oil is cold or dries cold
Tempering: heating-up temperature 660～700 DEG C, time 2～4 hours；The type of cooling: air cooling
Mechanical performance index should reach as follows:
Tensile strength: σ b >=930N/mm2
Yield strength: σ 0.2 >=750N/mm2
Percentage elongation: δ >=15%
The contraction percentage of area: ψ >=45%
Stress-rupture tester:
Experiment condition: temperature 650 DEG C；Stress 245N/mm2
Rupture time T >=300 hour.
The most according to claim 2 for the manufacture method containing Re Steel material of 630 DEG C of ultra-supercritical turbine blade,
It is characterized in that: in step one, preparation contains the required elementary composition for below C+N:0.20% of Re Steel material；Si:0.20%
Below；Below Mn:0.60%；Below Ni:0.7%；Mo+W:2.20～less than 3.20%；V+Nb or Ta:0.15～
0.40%；Co:0.5～2.00%；Re≤0.30%；Below B:0.015.
The most according to claim 3 for the manufacture method containing Re Steel material of 630 DEG C of ultra-supercritical turbine blade,
It is characterized in that: step 2 reduces the content of impurity element further extremely: P≤0.015%；S≤0.005%；Cu≤0.15%.
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Cited By (1)
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| CN109402490A (en) * | 2019-01-04 | 2019-03-01 | 四川六合锻造股份有限公司 | A method of improving the high-temperature behavior of Blade Steel containing Nb |
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|---|---|---|---|---|
| CN110283963A (en) * | 2019-07-31 | 2019-09-27 | 四川六合特种金属材料股份有限公司 | A kind of production technology of 1Cr11MoV Blade Steel |
| CN110682065A (en) * | 2019-11-06 | 2020-01-14 | 江阴市恒润重工股份有限公司 | Method for processing high-temperature-resistant ring piece for steam turbine |
| CN111809101A (en) * | 2020-06-10 | 2020-10-23 | 益阳紫荆福利铸业有限公司 | Smelting device and process of alloy steel casting for ultra-supercritical steam turbine |
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