CN102268564A - Preparation method for oxide dispersion strengthened nickel-base alloy - Google Patents
Preparation method for oxide dispersion strengthened nickel-base alloy Download PDFInfo
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- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 177
- 239000000956 alloy Substances 0.000 title claims abstract description 177
- 238000002360 preparation method Methods 0.000 title claims abstract description 61
- 229910001175 oxide dispersion-strengthened alloy Inorganic materials 0.000 title abstract 5
- 239000000843 powder Substances 0.000 claims abstract description 49
- 150000001875 compounds Chemical class 0.000 claims abstract description 47
- 238000005245 sintering Methods 0.000 claims abstract description 47
- 238000000034 method Methods 0.000 claims abstract description 17
- 229910044991 metal oxide Inorganic materials 0.000 claims abstract description 12
- 150000004706 metal oxides Chemical class 0.000 claims abstract description 12
- 238000001816 cooling Methods 0.000 claims abstract description 10
- 238000003723 Smelting Methods 0.000 claims abstract description 4
- 229910052751 metal Inorganic materials 0.000 claims abstract description 4
- 239000002184 metal Substances 0.000 claims abstract description 4
- 239000006185 dispersion Substances 0.000 claims description 54
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 32
- 230000006698 induction Effects 0.000 claims description 22
- 238000000465 moulding Methods 0.000 claims description 22
- 239000001257 hydrogen Substances 0.000 claims description 21
- 229910052739 hydrogen Inorganic materials 0.000 claims description 21
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 claims description 21
- 238000000498 ball milling Methods 0.000 claims description 20
- 239000007788 liquid Substances 0.000 claims description 20
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 19
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 18
- 239000007789 gas Substances 0.000 claims description 18
- 239000012467 final product Substances 0.000 claims description 17
- 238000002844 melting Methods 0.000 claims description 17
- 230000008018 melting Effects 0.000 claims description 17
- 238000002156 mixing Methods 0.000 claims description 16
- 229910052757 nitrogen Inorganic materials 0.000 claims description 16
- 239000002131 composite material Substances 0.000 claims description 13
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 10
- 239000003795 chemical substances by application Substances 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 10
- 238000002791 soaking Methods 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims description 10
- 235000015895 biscuits Nutrition 0.000 claims description 9
- 238000000748 compression moulding Methods 0.000 claims description 9
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 9
- 239000000470 constituent Substances 0.000 claims description 8
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 claims description 8
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 7
- 239000000320 mechanical mixture Substances 0.000 claims description 6
- ZCUFMDLYAMJYST-UHFFFAOYSA-N thorium dioxide Chemical compound O=[Th]=O ZCUFMDLYAMJYST-UHFFFAOYSA-N 0.000 claims description 5
- 239000004482 other powder Substances 0.000 claims description 4
- 238000010891 electric arc Methods 0.000 claims description 3
- 238000000462 isostatic pressing Methods 0.000 claims description 3
- 238000002485 combustion reaction Methods 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract description 3
- 238000005266 casting Methods 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 1
- 229910000601 superalloy Inorganic materials 0.000 description 10
- 239000000155 melt Substances 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005728 strengthening Methods 0.000 description 3
- 150000002431 hydrogen Chemical class 0.000 description 2
- 238000005551 mechanical alloying Methods 0.000 description 2
- 229910052727 yttrium Inorganic materials 0.000 description 2
- 230000007123 defense Effects 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
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Abstract
The invention relates to a preparation method for an oxide dispersion strengthened nickel-base alloy. The method is characterized in that: a concrete process of the preparation method for the oxide dispersion strengthened nickel-base alloy comprises: 1, preparing compound powders comprising a part-component metal of the nickel-base alloy component and a metal oxide, then carrying out forming for the compound powders, carrying out sintering for the resulting green body, then carrying out cooling to a room temperature and removing the resulting substance to prepare a metal oxide interalloy; 2, placing the metal oxide interalloy and a master alloy in a furnace according to the component ratio, then carrying out smelting and casting to prepare the oxide dispersion strengthened nickel-base alloy. Compared to the nickel-base alloy prepared through the prior art, the prepared oxide dispersion strengthened nickel-base alloy provided by the present invention can be adopted as an irreplaceable and capital structure material for the high temperature components (such as turbine blade, guide vane, turbine disc and combustion chamber) of aeroengine and combustion turbine.
Description
Technical field:
The present invention relates to the high temperature alloy technology of preparing, a kind of preparation method of oxide dispersion intensifying nickel-base alloy is provided especially.
Background technology:
In the prior art, superalloy is present dual-use aircraft engine and the irreplaceable key structure material of gas turbine high temperature component, parts such as turbine blade, turning vane, the turbine disk and combustion chamber particularly, it is the basis of a state aviation space industry, the superalloy proportion is up to 60% in advanced person's aircraft engine, and the level of superalloy has reflected the defense force and the industrial level of a country to a certain extent.
Traditional strengthening mechanism of superalloy mainly contains solution strengthening, precipitation strength, grain-boundary strengthening and production technique reinforcement etc.In reinforcing process, oxide dispersion intensifying is a class and the diverse superalloy of conventional high-temperature alloy, the main production method of this class alloy is to adopt the preparation of mechanical alloying method, by the mechanical alloying method inert oxide compound particle is joined in the powdered alloy, prepare superalloy by the agglomerating mode at last.The creep rupture strength of at present up-to-date oxide-dispersed alloy above thinking classic nickel-base cast superalloy now, can be produced in batches in the U.S., Britain, France, Germany and Japan and other countries.Therefore, this class alloy have an extraordinary development prospect, but also have certain weak point, single etc. as complex technical process, production cost height, apparatus expensive, product.
Comparatively speaking, cast superalloy has the advantages that technology is simple, cost is low, equipment is simple relatively, can produce the superalloy foundry goods of various complicated shapes, produce the oxide dispersion intensifying nickel-base alloy with forging type and also have many difficulties, oxide compound is difficult to and can evenly joins in the alloy.
Therefore, people expect to obtain the preparation method of the good oxide dispersion intensifying nickel-base alloy of a kind of technique effect.
Summary of the invention:
The preparation method who the purpose of this invention is to provide the oxide dispersion intensifying nickel-base alloy that a kind of technological process is simple, cost is low, technique effect is good.The preparation method of oxide dispersion intensifying nickel-base alloy.
The preparation method of a kind of oxide dispersion intensifying nickel-base alloy of the present invention is characterized in that: the preparation method's of described oxide dispersion intensifying nickel-base alloy concrete technological process is:
The first step: at first prepare the composite powder that nickel-base alloy part constituent element metal and metal oxide constitute, then with the composite powder moulding, biscuit is carried out sintering under reducing atmosphere, cool to room temperature takes out then, makes the metal oxide master alloy;
Second step:, metal oxide master alloy and mother alloy shove charge smelting and pouring are got final product according to composition proportion.
The preparation method of oxide dispersion intensifying nickel-base alloy of the present invention, the also claimed preferred content of number down:
Among the preparation method of described oxide dispersion intensifying nickel-base alloy, its employed composite powder of oxide compound master alloy is one of following two kinds: one, the mechanical mixture of nickel powder and oxidate powder; Its two, the mechanical mixture of nickel powder, oxidate powder and tungsten powder.Described oxide compound is a kind of in yttrium oxide, aluminium sesquioxide, the Thorotrast.
Among the preparation method of described oxide dispersion intensifying nickel-base alloy, also satisfy following requirement in the process of preparation oxide compound master alloy:
At first the employed powder composite mixture of oxide compound master alloy is carried out moulding with mechanical system, carry out sintering then under reducing atmosphere, furnace cooling can prepare the oxide compound master alloy to room temperature then;
The employed nickel powder of preparation oxide compound master alloy, oxidate powder, tungsten powder are other powder of nano-micro level; Powder is carried out the blended specific requirement is: adopt the mechanical ball milling mode, the ball milling time is 1～60 hour, and blending agent adopts acetone or hexane.
Among the preparation method of described oxide dispersion intensifying nickel-base alloy, the nickel-base alloy part constituent element powder that the oxide compound master alloy is used and the mass ratio of oxidate powder are (60～95): (5～40).Further preferred mass ratio is (80～95): (5～20).
The preparation method of described oxide dispersion intensifying nickel-base alloy also satisfies one of following requirement or its combination:
1) concrete grammar that powder mix is carried out moulding is: compression molding mode or isostatic pressing mode;
2) in the preparation process of described oxide compound master alloy, agglomerating requires: carry out isothermal sintering under 1300 ℃～1600 ℃ and reducing atmosphere, and 1～3 hour soaking time time, restitutive protection's property atmosphere of using during sintering adopts following two kinds: one is high-purity hydrogen; The mixed gas of its two employing high-purity hydrogen and high-purity nitrogen, the ratio of hydrogen and nitrogen is 1: 1～1: 5; The flow of reducing gas can be controlled in 5～50ml/min.cm
2After the isothermal sintering, furnace cooling is to room temperature, and taking-up gets final product;
3) during described oxide compound master alloy sintering employed equipment be following both one of: continous way atmosphere protection tube furnace; Intermittent type atmosphere protection tube furnace.
4) among the preparation method of described oxide dispersion intensifying nickel-base alloy, the oxide compound master alloy can also can add in melting latter stage in the mode of batching directly with the alloy melting; After master alloy adds, but hoisting power and carrying out induction stirring 2-10 minute, and it is more even that oxide compound is disperseed in alloy liquid, reduces power then and lower the temperature, and treats to pour into a mould when alloy liquid drops to teeming temperature to get final product.
5) among the preparation method of described oxide dispersion intensifying nickel-base alloy, melting can be adopted electric arc furnace, induction furnace or vacuum induction furnace.
In terms of existing technologies, the described oxide dispersion intensifying nickel-base alloy for preparing of the present invention can be used as the irreplaceable key structure material of aircraft engine and gas turbine high temperature component (for example: turbine blade, turning vane, the turbine disk and combustion chamber).Simultaneously, technological process of the present invention is simple relatively, and technique effect is significantly better than prior art.
Description of drawings:
Fig. 1 is NiW-5%Y
2O
3The master alloy microtexture;
Fig. 2 is a dispersed oxide nickel base superalloy microstructure;
Fig. 3 is Ni-10%Y
2O
3The master alloy microtexture.
Embodiment:
The preparation method of 1 one kinds of oxide dispersion intensifying nickel-base alloys of embodiment
At first adopt the mechanical ball milling mode that micron level nickel powder (mass ratio 9.5%), yttrium oxide powder (mass ratio 5%), tungsten powder (mass ratio 85.5%) are carried out uniform mixing; Blending agent adopts acetone, and the ball milling time is 20 hours; Carry out moulding with the compression molding mode then, after the moulding biscuit is carried out sintering; Sintering oven adopts continous way atmosphere protection tube furnace, and atmosphere adopts high-purity hydrogen, and flow control is at 30-40ml/min.cm
2The isothermal sintering temperature is 1500 ℃, and soaking time is 0.5 hour; After isothermal sintering finished, furnace cooling was to room temperature, and taking-up gets final product.The master alloy microtexture of gained is seen Fig. 1.
Master alloy (accounting for alloy total amount mass ratio is 5%) and K418 mother alloy are carried out melting in vacuum induction furnace, after treating that alloy all melts, hoisting power carries out alloy liquid induction stirring 3-5 minute, reducing power then lowers the temperature, treat to pour into a mould when alloy liquid is reduced to teeming temperature, make the oxide dispersion intensifying nickel-base alloy at last, alloy microscopic structure is seen Fig. 2.
The preparation method of 2 one kinds of oxide dispersion intensifying nickel-base alloys of embodiment
At first adopt the mechanical ball milling mode that the other nickel powder of nano-micro level (mass ratio 10%), yttrium oxide powder (mass ratio 10%), tungsten powder (mass ratio 80%) are carried out uniform mixing; Blending agent adopts acetone, and the ball milling time is 15 hours; Carry out moulding with the compression molding mode then, after the moulding biscuit is carried out sintering; Sintering oven adopts continous way atmosphere protection tube furnace, and atmosphere adopts high-purity hydrogen, and flow control is at 30-40ml/min.cm
2The isothermal sintering temperature is 1400 ℃, and soaking time is 2 hours; After isothermal sintering finished, furnace cooling was to room temperature, and taking-up gets final product.
Master alloy (accounting for alloy total amount mass ratio is 10%) and K417 mother alloy are carried out melting in vacuum induction furnace, after treating that alloy all melts, hoisting power carries out alloy liquid induction stirring 3-5 minute, reducing power then lowers the temperature, treat to pour into a mould when alloy liquid is reduced to teeming temperature, make the oxide dispersion intensifying nickel-base alloy at last.
The preparation method of 3 one kinds of oxide dispersion intensifying nickel-base alloys of embodiment
At first adopt the mechanical ball milling mode that micron level nickel powder (mass ratio 95%) and yttrium oxide powder (mass ratio 5%) are carried out uniform mixing; Blending agent adopts hexane, and the ball milling time is 30 hours; Carry out moulding with the compression molding mode then, after the moulding biscuit is carried out sintering; Sintering oven adopts continous way atmosphere protection tube furnace, adopts the mixed gas of high-purity hydrogen and high-purity nitrogen, and the ratio of hydrogen and nitrogen is between 1: 1, and the flow of reducing gas can be controlled in 20-30ml/min.cm
2The isothermal sintering temperature is 1400 ℃, and soaking time is 2 hours; After isothermal sintering finished, with stove insulation cool to room temperature, taking-up got final product.
Master alloy (accounting for alloy total amount mass ratio is 8%) and K452 mother alloy are carried out melting in vacuum induction furnace, after treating that alloy all melts, hoisting power carries out alloy liquid induction stirring 3-5 minute, reducing power then lowers the temperature, treat to pour into a mould when alloy liquid is reduced to teeming temperature, make the oxide dispersion intensifying nickel-base alloy at last.
The preparation method of 4 one kinds of oxide dispersion intensifying nickel-base alloys of embodiment
At first adopt the mechanical ball milling mode that other nickel powder of nano-micro level (mass ratio 90%) and yttrium oxide powder (mass ratio 10%) are carried out uniform mixing; Blending agent adopts hexane, and the ball milling time is 30 hours; Carry out moulding with the compression molding mode then, after the moulding biscuit is carried out sintering; Sintering oven adopts continous way atmosphere protection tube furnace, adopts the mixed gas of high-purity hydrogen and high-purity nitrogen, and the ratio of hydrogen and nitrogen is between 1: 1, and the flow of reducing gas can be controlled in 20-30ml/min.cm
2The isothermal sintering temperature is 1420 ℃, and soaking time is 2 hours; After isothermal sintering finished, with stove insulation cool to room temperature, taking-up got final product.The master alloy microtexture of gained is seen figure three.
Master alloy (accounting for alloy total amount mass ratio is 5%) and K438 mother alloy are carried out melting in vacuum induction furnace, after treating that alloy all melts, hoisting power carries out alloy liquid induction stirring 3-5 minute, reducing power then lowers the temperature, treat to pour into a mould when alloy liquid is reduced to teeming temperature, make the oxide dispersion intensifying nickel-base alloy at last.
The preparation method of 5 one kinds of oxide dispersion intensifying nickel-base alloys of embodiment
At first adopt the mechanical ball milling mode that Nano grade nickel powder (mass ratio 90%) and aluminium oxide powder (mass ratio 10%) are carried out uniform mixing; Blending agent adopts hexane, and the ball milling time is 10 hours; Carry out moulding with the compression molding mode then, after the moulding biscuit is carried out sintering; Sintering oven adopts continous way atmosphere protection tube furnace, adopts the mixed gas of high-purity hydrogen and high-purity nitrogen, and the ratio of hydrogen and nitrogen is between 1: 1, and the flow of reducing gas can be controlled in 20-30ml/min.cm
2The isothermal sintering temperature is 1400 ℃, and soaking time is 2 hours; After isothermal sintering finished, with stove insulation cool to room temperature, taking-up got final product.
Master alloy (accounting for alloy total amount mass ratio is 2%) and K441 mother alloy are carried out melting in vacuum induction furnace, after treating that alloy all melts, hoisting power carries out alloy liquid induction stirring 3-5 minute, reducing power then lowers the temperature, treat to pour into a mould when alloy liquid is reduced to teeming temperature, make the oxide dispersion intensifying nickel-base alloy at last.
The preparation method of 6 one kinds of oxide dispersion intensifying nickel-base alloys of embodiment
At first adopt the mechanical ball milling mode that Nano grade nickel powder (mass ratio 90%) and Thorotrast powder (mass ratio 10%) are carried out uniform mixing; Blending agent adopts hexane, and the ball milling time is 20 hours; Carry out moulding with the compression molding mode then, after the moulding biscuit is carried out sintering; Sintering oven adopts continous way atmosphere protection tube furnace, adopts the mixed gas of high-purity hydrogen and high-purity nitrogen, and the ratio of hydrogen and nitrogen is between 1: 1, and the flow of reducing gas can be controlled in 20-30ml/min.cm
2The isothermal sintering temperature is 1400 ℃, and soaking time is 2 hours; After isothermal sintering finished, with stove insulation cool to room temperature, taking-up got final product.
Master alloy (accounting for alloy total amount mass ratio is 1%) and K441 mother alloy are carried out melting in vacuum induction furnace, after treating that alloy all melts, hoisting power carries out alloy liquid induction stirring 3-5 minute, reducing power then lowers the temperature, treat to pour into a mould when alloy liquid is reduced to teeming temperature, make the oxide dispersion intensifying nickel-base alloy at last.
Embodiment 7
A kind of preparation method of oxide dispersion intensifying nickel-base alloy, its concrete technological process is:
The first step: at first prepare the composite powder that nickel-base alloy part constituent element metal and metal oxide constitute, then with the composite powder moulding, biscuit is carried out sintering under reducing atmosphere, cool to room temperature takes out then, makes the metal oxide master alloy;
Second step:, metal oxide master alloy and mother alloy shove charge smelting and pouring are got final product according to composition proportion.
Among the preparation method of described oxide dispersion intensifying nickel-base alloy, the mechanical mixture that its employed composite powder of oxide compound master alloy is nickel powder and oxidate powder.Described oxide compound is a kind of in yttrium oxide, aluminium sesquioxide, the Thorotrast.
Among the preparation method of described oxide dispersion intensifying nickel-base alloy, also satisfy following requirement in the process of preparation oxide compound master alloy:
At first the employed powder composite mixture of oxide compound master alloy is carried out moulding with mechanical system, carry out sintering then under reducing atmosphere, furnace cooling can prepare the oxide compound master alloy to room temperature then;
The employed nickel powder of preparation oxide compound master alloy, oxidate powder, tungsten powder are other powder of nano-micro level; Powder is carried out the blended specific requirement is: adopt the mechanical ball milling mode, the ball milling time is 1 hour, and blending agent adopts acetone.
Among the preparation method of described oxide dispersion intensifying nickel-base alloy, the nickel-base alloy part constituent element powder that the oxide compound master alloy is used and the mass ratio of oxidate powder are 60: 40.
The preparation method of described oxide dispersion intensifying nickel-base alloy also satisfies one of following requirement or its combination:
1) concrete grammar that powder mix is carried out moulding is: compression molding mode or isostatic pressing mode;
2) in the preparation process of described oxide compound master alloy, agglomerating requires: carry out isothermal sintering under 1300 ℃ and reducing atmosphere, and the 1 hour soaking time time, restitutive protection's property atmosphere of using during sintering adopts high-purity hydrogen or adopts the mixed gas of high-purity hydrogen and high-purity nitrogen, and the ratio of hydrogen and nitrogen is 1: 1; The flow of reducing gas can be controlled in 5ml/min.cm
2After the isothermal sintering, furnace cooling is to room temperature, and taking-up gets final product;
3) employed equipment is continous way atmosphere protection tube furnace during described oxide compound master alloy sintering.
4) among the preparation method of described oxide dispersion intensifying nickel-base alloy, the oxide compound master alloy can also can add in melting latter stage in the mode of batching directly with the alloy melting; After master alloy adds, but hoisting power and carried out induction stirring 2 minutes, and it is more even that oxide compound is disperseed in alloy liquid, reduces power then and lower the temperature, and treats to pour into a mould when alloy liquid drops to teeming temperature to get final product.
5) among the preparation method of described oxide dispersion intensifying nickel-base alloy, electric arc furnace or induction furnace or vacuum induction furnace are adopted in melting.
Embodiment 8
Present embodiment and embodiment 7 contents are basic identical, and its difference mainly is:
1) among the preparation method of described oxide dispersion intensifying nickel-base alloy, the mechanical mixture that its employed composite powder of oxide compound master alloy is nickel powder, oxidate powder and tungsten powder.Described oxide compound is a kind of in yttrium oxide, aluminium sesquioxide, the Thorotrast.
2) in the process of preparation oxide compound master alloy, the employed nickel powder of preparation oxide compound master alloy, oxidate powder, tungsten powder are other powder of nano-micro level; Powder is carried out the blended specific requirement is: adopt the mechanical ball milling mode, the ball milling time is 60 hours, and blending agent adopts hexane.
3) among the preparation method of described oxide dispersion intensifying nickel-base alloy, the nickel-base alloy part constituent element powder that the oxide compound master alloy is used and the mass ratio of oxidate powder are 95: 5.
4) preparation method of described oxide dispersion intensifying nickel-base alloy also satisfies following requirement:
The concrete grammar that powder mix is carried out moulding is the hydrostatic profile mode;
In the preparation process of described oxide compound master alloy, agglomerating requires: carry out isothermal sintering under 1600 ℃ and reducing atmosphere, and the 3 hours soaking time time, restitutive protection's property atmosphere of using during sintering adopts the mixed gas of high-purity hydrogen and high-purity nitrogen, and the ratio of hydrogen and nitrogen is 1: 5; The flow of reducing gas can be controlled in 50ml/min.cm
2After the isothermal sintering, furnace cooling is to room temperature, and taking-up gets final product;
Employed equipment is intermittent type atmosphere protection tube furnace during described oxide compound master alloy sintering.
Among the preparation method of described oxide dispersion intensifying nickel-base alloy, the oxide compound master alloy can also can add in melting latter stage in the mode of batching directly with the alloy melting; After master alloy adds, but hoisting power and carried out induction stirring 10 minutes, and it is more even that oxide compound is disperseed in alloy liquid, reduces power then and lower the temperature, and treats to pour into a mould when alloy liquid drops to teeming temperature to get final product.
Claims (6)
1. the preparation method of an oxide dispersion intensifying nickel-base alloy, it is characterized in that: the preparation method's of described oxide dispersion intensifying nickel-base alloy concrete technological process is:
The first step: at first prepare the composite powder that nickel-base alloy part constituent element metal and metal oxide constitute, then with the composite powder moulding, biscuit is carried out sintering under reducing atmosphere, cool to room temperature takes out then, makes the metal oxide master alloy;
Second step:, metal oxide master alloy and mother alloy shove charge smelting and pouring are got final product according to composition proportion.
2. according to the preparation method of the described oxide dispersion intensifying nickel-base alloy of claim 1, it is characterized in that: among the preparation method of described oxide dispersion intensifying nickel-base alloy, its employed composite powder of oxide compound master alloy is one of following two kinds: one, the mechanical mixture of nickel powder and oxidate powder; Its two, the mechanical mixture of nickel powder, oxidate powder and tungsten powder; Described oxide compound is a kind of in yttrium oxide, aluminium sesquioxide, the Thorotrast.
3. according to the preparation method of the described oxide dispersion intensifying nickel-base alloy of claim 2, it is characterized in that: among the preparation method of described oxide dispersion intensifying nickel-base alloy, also satisfy following requirement in the process of preparation oxide compound master alloy:
At first the employed powder composite mixture of oxide compound master alloy is carried out moulding with mechanical system, carry out sintering then under reducing atmosphere, furnace cooling can prepare the oxide compound master alloy to room temperature then;
The employed nickel powder of preparation oxide compound master alloy, oxidate powder, tungsten powder are other powder of nano-micro level; Powder is carried out the blended specific requirement is: adopt the mechanical ball milling mode, the ball milling time is 1～60 hour, and blending agent adopts acetone or hexane.
4. according to the preparation method of the described oxide dispersion intensifying nickel-base alloy of claim 3, it is characterized in that: among the preparation method of described oxide dispersion intensifying nickel-base alloy, the nickel-base alloy part constituent element powder that the oxide compound master alloy is used and the mass ratio of oxidate powder are (60～95): (5～40).
5. according to the preparation method of the described oxide dispersion intensifying nickel-base alloy of claim 4, it is characterized in that: among the preparation method of described oxide dispersion intensifying nickel-base alloy, the nickel-base alloy part constituent element powder that the oxide compound master alloy is used and the mass ratio of oxidate powder are (80～95): (5～20).
6. according to the preparation method of the described oxide dispersion intensifying nickel-base alloy of claim 2, it is characterized in that: the preparation method of described oxide dispersion intensifying nickel-base alloy also satisfies one of following requirement or its combination:
1) concrete grammar that powder mix is carried out moulding is: compression molding mode or isostatic pressing mode;
2) in the preparation process of described oxide compound master alloy, agglomerating requires: carry out isothermal sintering under 1300 ℃～1600 ℃ and reducing atmosphere, and 1～3 hour soaking time time, restitutive protection's property atmosphere of using during sintering adopts following two kinds: one is high-purity hydrogen; The mixed gas of its two employing high-purity hydrogen and high-purity nitrogen, the ratio of hydrogen and nitrogen is 1: 1～1: 5; The flow of reducing gas can be controlled in 5～50ml/min.cm
2After the isothermal sintering, furnace cooling is to room temperature, and taking-up gets final product;
3) during described oxide compound master alloy sintering employed equipment be following both one of: continous way atmosphere protection tube furnace; Intermittent type atmosphere protection tube furnace.
4) among the preparation method of described oxide dispersion intensifying nickel-base alloy, the oxide compound master alloy can also can add in melting latter stage in the mode of batching directly with the alloy melting; After master alloy adds, but hoisting power and carrying out induction stirring 2-10 minute, and it is more even that oxide compound is disperseed in alloy liquid, reduces power then and lower the temperature, and treats to pour into a mould when alloy liquid drops to teeming temperature to get final product.
5) among the preparation method of described oxide dispersion intensifying nickel-base alloy, melting can be adopted electric arc furnace, induction furnace or vacuum induction furnace.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104894464A (en) * | 2015-05-14 | 2015-09-09 | 浙江工贸职业技术学院 | Preparation method of iron-yttria intermediate alloy for casting |
| CN104928587A (en) * | 2015-05-14 | 2015-09-23 | 浙江工贸职业技术学院 | Method for machining yttria dispersion-strengthened steel |
| CN105537884A (en) * | 2016-02-23 | 2016-05-04 | 桐乡市搏腾贸易有限公司 | Method for manufacturing marine mechanical turbine from Ni-Zn based alloy |
| CN107824771A (en) * | 2017-11-13 | 2018-03-23 | 北京科技大学 | A kind of method that melt casting process prepares oxide dispersion intensifying F/M steel |
| CN112170854A (en) * | 2020-10-14 | 2021-01-05 | 中南大学 | Method for preparing nano spherical oxide dispersion strengthening phase |
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- 2010-06-02 CN CN 201010189407 patent/CN102268564A/en active Pending
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Cited By (8)
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| CN104894464A (en) * | 2015-05-14 | 2015-09-09 | 浙江工贸职业技术学院 | Preparation method of iron-yttria intermediate alloy for casting |
| CN104928587A (en) * | 2015-05-14 | 2015-09-23 | 浙江工贸职业技术学院 | Method for machining yttria dispersion-strengthened steel |
| CN105537884A (en) * | 2016-02-23 | 2016-05-04 | 桐乡市搏腾贸易有限公司 | Method for manufacturing marine mechanical turbine from Ni-Zn based alloy |
| CN107824771A (en) * | 2017-11-13 | 2018-03-23 | 北京科技大学 | A kind of method that melt casting process prepares oxide dispersion intensifying F/M steel |
| CN107824771B (en) * | 2017-11-13 | 2019-01-15 | 北京科技大学 | A kind of method that melt casting process prepares oxide dispersion intensifying F/M steel |
| US11203792B2 (en) | 2017-11-13 | 2021-12-21 | University Of Science And Technology Beijing | Method for preparing oxide dispersion strengthening F/M steel using smelting and casting process |
| CN112170854A (en) * | 2020-10-14 | 2021-01-05 | 中南大学 | Method for preparing nano spherical oxide dispersion strengthening phase |
| CN112170854B (en) * | 2020-10-14 | 2021-06-15 | 中南大学 | Method for preparing nano spherical oxide dispersion strengthening phase |
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Application publication date: 20111207 |