CN103133054A - High-hardness high-temperature-resistant stable turbine blade - Google Patents
High-hardness high-temperature-resistant stable turbine blade Download PDFInfo
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- CN103133054A CN103133054A CN 201110399621 CN201110399621A CN103133054A CN 103133054 A CN103133054 A CN 103133054A CN 201110399621 CN201110399621 CN 201110399621 CN 201110399621 A CN201110399621 A CN 201110399621A CN 103133054 A CN103133054 A CN 103133054A
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Abstract
The invention discloses a high-hardness high-temperature-resistant stable turbine blade. For materials prone to oxidation in a fused state, a vacuum paint immersion and stacking forming machining process is adopted, an alumina coating is applied to the surface of the high-hardness high-temperature-resistant stable turbine blade, the high-temperature-resisting physical property of the alumina coating is utilized for resisting the high temperature environment in a turbine cylinder, aluminum oxide with the concentration of over 60% is used as the coating of the blade, 16% of inorganic high-hardness yield tungsten metal and 35% of anti-corrosion chromium metal are used as a substrate, 5% of molybdenum, 2% of tungsten, 3% of niobium, 2% of boron, 2% of nickel and other intensifying elements are used as auxiliary materials, the physical property of high hardness of the tungsten metal is utilized for intensifying the hardness of the materials, and the chemical properties of the chromium metal that the chromium metal is not prone to oxidation and is resistant to corrosion and stable are utilized for prolonging the service lives of the materials. Through the combination of the tungsten metal and the chromium metal, on one hand, the hardness and the corrosion resistance of the materials can be improved, and on the other hand, the strength coefficient of the tungsten metal and the strength coefficient of the chromium metal can be increased. The high-hardness high-temperature-resistant stable turbine blade has the advantages that due to the fact that the high-hardness high-temperature-resistant stable turbine blade is specially designed in allusion to turbines with high requirements on the strength of blades, the high-hardness high-temperature-resistant stable turbine blade is suitable for being used in the turbines in all fields and as related blades with the requirements on high strength and high heat resistance.
Description
Technical field
The present invention relates to a kind of stainless steel blade, especially a kind of turbine blade.
Background technique
Steam turbing blade renewal (steel for turbin.Blade) general name of rotor and stator blade use steel in steam turbine.Turbine blade is subjected to the effect of high temperature and high pressure steam, is bearing larger moment of flexure in work, and the moving vane in running up also will bear very high centrifugal force; Be in the blade, particularly final stage of wet Yan Qiqu, stand electrochemical corrosion and water droplet erosion moving vane also will bear very complicated excitation force.Therefore, blade should satisfy following requirement with steel: have enough room temperatures, mechanical behavior under high temperature and the anti-sex change of walking slowly like a woman that high anti-vibration damping capacity can be arranged; High structure stability; Good corrosion-resistant and erosion resistance; Good technology capability.
Blade material is used ICr13, ZCrz3 etc. and is contained 12% 1 13%Cr steel of the intensified elements such as Mo, W, Nb, B, Ni as base, good resistance to shock and corrosion resistance are arranged, become the main material of turbine blade, but the blade in bunch 400 ℃ of not high overheated Yan Qiqu work with requiring corrosion resistance of some operating temperature, can make blade to reduce cost, as ZoerMo, ZsMnZv and 15MnMoVCu etc. with some low alloy steel.Blade in wet-steam region work need be used the high stainless steel of corrosion resistance, and will use the blade Steel material of higher hot strength or intensity along with the increasing of the raising of serviceability temperature and blade dimensions.Icr13,2Cr13 etc. can be used for operating temperature bunches 45.' C blade.Temperature surpasses 500 ℃, needs on the basis of ICr13 type the steel that adds multicomponent alloy elements Mo, W, Nb, B, Ni etc. to strengthen.
Summary of the invention
Traditional high power turbine blade matter is crisp in order to overcome, easily shortcoming and the drawback such as be corroded, and the object of the present invention is to provide a kind of high hardness, corrosion resistant turbine blade.
a kind of high-hardness high temperature resistant stabilized turbine blade, it is characterized in that: by protective coating, structure blade and wear heat-conducting unit and form, make principle by layer, to a certain extent three-dimensional production task is simplified to a plurality of two-dimentional production processes, surface at blade imposes aluminum oxide coating layer, utilize the hot environment in the resistant to elevated temperatures physical property opposing of aluminium oxide steam turbine cylinder, with the aluminium sesquioxide of 60% above concentration as blade coatings, inorganic high hardness surrender tungsten take 16% and 35% noncorroding metal chromium are as base, be aided with 5%Mo, 2%W, 3%Nb, 2%B, the intensified elements such as 2%Ni, the effect of tungsten is to utilize the physical property of its high hardness to strengthen the hardness of material, it is oxidized that the effect of crome metal is to utilize it to be difficult for, corrosion-resistant stable chemical property is strengthened the working life of material, the steam turbine institute specialized designs of blade strength being had relatively high expectations for some, the combination of tungsten and chromium improves Material Strength on the one hand, corrosion resistance, strengthen on the one hand this 2 strength coefficients separately.
The invention has the beneficial effects as follows, for some to the high temperature resistant steam turbine institute specialized designs of having relatively high expectations of blade, aluminum oxide coating layer can guarantee not to be evaporated at the temperature of 3250K at least, the combination of tungsten and chromium has improved Material Strength, corrosion resistance on the one hand, this 2 strength coefficients have separately been strengthened again on the one hand, be applicable to be applied to the steam turbine of every field, and the relevant blade that high strength and high heat-resisting requirement are arranged.
Embodiment
The present invention is further described below in conjunction with case study on implementation.
the steam turbine institute specialized designs of blade strength being had relatively high expectations for some, in the middle of the blade consumption process of some high-power large-size steam turbines, test to the anticorrosive and anti-strike degree of blade, why the blade reason that becomes the main consumable part of steam turbine just be the anti-strike of traditional turbine blade and anticorrosive insufficient strength high, the various shortcoming and the drawback that the present invention is directed to traditional turbine blade existence are improved, aluminum oxide coating layer is piled up moulding and is strengthened the steel turbine blade, main component contains ICr13, ZCrz3 etc., it is characterized in that aluminum oxide coating layer strengthen the steel turbine blade under molten state easily the material of oxidation take vacuum paint dipping to pile up the processing technology of moulding, make principle by layer, to a certain extent three-dimensional production task is simplified to a plurality of two-dimentional production processes, surface at blade imposes aluminum oxide coating layer, utilize the hot environment in the resistant to elevated temperatures physical property opposing of aluminium oxide steam turbine cylinder, with the aluminium sesquioxide of 60% above concentration as blade coatings, inorganic high hardness surrender tungsten take 16% and 35% noncorroding metal chromium are as base, be aided with 5%Mo, 2%W, 3%Nb, 2%B, the intensified elements such as 2%Ni, the effect of tungsten is to utilize the physical property of its high hardness to strengthen the hardness of material, it is oxidized that the effect of crome metal is to utilize it to be difficult for, corrosion-resistant stable chemical property is strengthened the working life of material, the steam turbine institute specialized designs of blade strength being had relatively high expectations for some, the combination of tungsten and chromium can improve Material Strength on the one hand, corrosion resistance, can strengthen again on the one hand this 2 strength coefficients separately.
Make principle by layer, to a certain extent three-dimensional production task is simplified to a plurality of two-dimentional production processes, be conducive to be copied into the member with complicated geometrical shape with very accurate physical model, in rapid shaping is made, this technique is used for fast and low cost fabrication exemplar and prototype, the precondition of using this technique is that the three-dimensional CAD data will be arranged, for this production process, make a plurality of members as needs, also can make in a production process simultaneously, the accumulation forming process of this member is carried out automatically.According to the thickness of cladding material and the difference of member size, this forming process can continue several hours time to a couple of days.
The effect of 16% crome metal is the corrosion resistance of stiffener matter, chromium can significantly improve intensity, hardness wear resistance, but reduce simultaneously plasticity and toughness, chromium can improve oxidative stability and the corrosion resistance of steel, and chromium is a kind of polyvalent metal element, atomic number 24, usually the chromium that makes, matter is hard and crisp, and is anticorrosive, only exist with combined form, chromium content in the present invention is with the chromium cubage in the compounds such as ICr13, ZCrz3.
The effect of 35% tungsten is yield strength and the hardness of stiffener matter, 3410 ± 20 ℃ of the fusing points of tungsten, 5927 ℃ of boiling points, Mohs hardness 7.5, the torsion modulus is greater than 36000Mpa, and the combination of tungsten and chromium is to strengthen material resources intensity separately, forms complementarity condition.
Claims (4)
1. high-hardness high temperature resistant stabilized turbine blade, it is characterized in that: a kind of high-hardness high temperature resistant stabilized turbine blade takes vacuum paint dipping to pile up the processing technology of moulding for the material of easy oxidation under molten state, by protective coating, structure blade and wear heat-conducting unit and form, make principle by layer, to a certain extent three-dimensional production task is simplified to a plurality of two-dimentional production processes, surface at blade imposes aluminum oxide coating layer, utilize the hot environment in the resistant to elevated temperatures physical property opposing of aluminium oxide steam turbine cylinder, with the aluminium sesquioxide of 60% above concentration as blade coatings, inorganic high hardness surrender tungsten take 16% and 35% noncorroding metal chromium are as base, be aided with 5%Mo, 2%W, 3%Nb, 2%B, the intensified elements such as 2%Ni, the effect of tungsten is to utilize the physical property of its high hardness to strengthen the hardness of material, it is oxidized that the effect of crome metal is to utilize it to be difficult for, corrosion-resistant stable chemical property is strengthened the working life of material, the steam turbine institute specialized designs of blade strength being had relatively high expectations for some, the combination of tungsten and chromium improves Material Strength on the one hand, corrosion resistance, strengthen on the one hand this 2 strength coefficients separately.
2. a kind of high-hardness high temperature resistant stabilized turbine blade according to claim 1, it is characterized in that: a kind of high-hardness high temperature resistant stabilized turbine blade is made principle by layer, to a certain extent three-dimensional production task is simplified to a plurality of two-dimentional production processes.Be conducive to be copied into the member with complicated geometrical shape with very accurate physical model, in rapid shaping is made, this technique is used for fast and low cost fabrication exemplar and prototype, the precondition of using this technique is that the three-dimensional CAD data will be arranged, for this production process, make a plurality of members as needs, also can make in a production process simultaneously, the accumulation forming process of this member is carried out automatically.According to the thickness of cladding material and the difference of member size, this forming process can continue several hours time to a couple of days.
3. a kind of high-hardness high temperature resistant stabilized turbine blade according to claim 1, it is characterized in that: a kind of effect of high-hardness high temperature resistant stabilized turbine blade 16% crome metal is the corrosion resistance of stiffener matter, chromium can significantly improve intensity, the hardness wear resistance, but reduce simultaneously plasticity and toughness, chromium can improve oxidative stability and the corrosion resistance of steel, chromium is a kind of polyvalent metal element, atomic number 24, usually the chromium that makes, matter is hard and crisp, anticorrosive, only exist with combined form, chromium content in the present invention is with at ICr13, chromium cubage in the compounds such as ZCrz3.
4. a kind of high-hardness high temperature resistant stabilized turbine blade according to claim 1, it is characterized in that: a kind of effect of tungsten of high-hardness high temperature resistant stabilized turbine blade 35% is yield strength and the hardness of stiffener matter, 3410 ± 20 ℃ of the fusing points of tungsten, boiling point 5927, Mohs hardness 7.5, the torsion modulus is greater than 36000Mpa, and the combination of tungsten and chromium is to strengthen material resources intensity separately, forms complementarity condition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110399621 CN103133054A (en) | 2011-12-05 | 2011-12-05 | High-hardness high-temperature-resistant stable turbine blade |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110399621 CN103133054A (en) | 2011-12-05 | 2011-12-05 | High-hardness high-temperature-resistant stable turbine blade |
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| CN103133054A true CN103133054A (en) | 2013-06-05 |
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| CN 201110399621 Pending CN103133054A (en) | 2011-12-05 | 2011-12-05 | High-hardness high-temperature-resistant stable turbine blade |
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Application publication date: 20130605 |