CN111036895A - Preparation method of oxygen supersaturated precursor powder for nano-oxide dispersion strengthened steel - Google Patents
Preparation method of oxygen supersaturated precursor powder for nano-oxide dispersion strengthened steel Download PDFInfo
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- 239000000843 powder Substances 0.000 title claims abstract description 104
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 82
- 239000010959 steel Substances 0.000 title claims abstract description 82
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 65
- 239000001301 oxygen Substances 0.000 title claims abstract description 65
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 65
- 239000002243 precursor Substances 0.000 title claims abstract description 41
- 229910001175 oxide dispersion-strengthened alloy Inorganic materials 0.000 title claims abstract description 39
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 56
- 239000000956 alloy Substances 0.000 claims abstract description 56
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims abstract description 24
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 claims abstract description 18
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 17
- 238000000498 ball milling Methods 0.000 claims abstract description 17
- 239000002131 composite material Substances 0.000 claims abstract description 17
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims abstract description 16
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 13
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910052786 argon Inorganic materials 0.000 claims abstract description 12
- 238000003756 stirring Methods 0.000 claims abstract description 12
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000001816 cooling Methods 0.000 claims abstract description 7
- 238000002156 mixing Methods 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims description 14
- RUDFQVOCFDJEEF-UHFFFAOYSA-N oxygen(2-);yttrium(3+) Chemical compound [O-2].[O-2].[O-2].[Y+3].[Y+3] RUDFQVOCFDJEEF-UHFFFAOYSA-N 0.000 claims description 7
- 238000000227 grinding Methods 0.000 claims description 5
- 239000002994 raw material Substances 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 5
- 239000006185 dispersion Substances 0.000 abstract description 10
- 230000008595 infiltration Effects 0.000 abstract description 8
- 238000001764 infiltration Methods 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 3
- 239000011159 matrix material Substances 0.000 abstract description 3
- 238000005054 agglomeration Methods 0.000 abstract description 2
- 230000002776 aggregation Effects 0.000 abstract description 2
- 238000005728 strengthening Methods 0.000 description 10
- 238000003723 Smelting Methods 0.000 description 6
- 229910000734 martensite Inorganic materials 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000006104 solid solution Substances 0.000 description 4
- 238000009736 wetting Methods 0.000 description 4
- 239000000498 cooling water Substances 0.000 description 3
- 239000001307 helium Substances 0.000 description 3
- 229910052734 helium Inorganic materials 0.000 description 3
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 3
- 238000005551 mechanical alloying Methods 0.000 description 3
- 238000005204 segregation Methods 0.000 description 3
- 238000005303 weighing Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 229910052761 rare earth metal Inorganic materials 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000009377 nuclear transmutation Methods 0.000 description 1
- 230000006911 nucleation Effects 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- 150000002926 oxygen Chemical class 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
Classifications
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- B22F1/0003—
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
- C22C32/001—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with only oxides
- C22C32/0015—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with only oxides with only single oxides as main non-metallic constituents
- C22C32/0026—Matrix based on Ni, Co, Cr or alloys thereof
-
- 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
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- 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
- C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
-
- 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
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium 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
- C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
- B22F2009/043—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling by ball milling
Abstract
The invention discloses a preparation method of oxygen supersaturated precursor powder for nano-oxide dispersion strengthened steel, which comprises the following steps: (1) mixing atomized chromium powder, atomized titanium powder, atomized tungsten powder, atomized yttrium powder, yttrium oxide powder and atomized iron powder to obtain composite alloy powder; (2) adding the composite alloy powder obtained in the step (1) into a stirring ball mill, and performing ball milling treatment under the protection of argon to obtain oxygen supersaturated alloy powder; (3) and (3) placing the oxygen supersaturated alloy powder obtained in the step (2) in an argon protection environment for cooling treatment. The inventor finds that the surface activity of the alloy powder can be effectively improved by adding the atomized yttrium powder, the infiltration angle between the finally obtained oxygen supersaturated precursor powder for the nano oxide dispersion strengthened steel and the matrix molten steel is smaller than 90 degrees, the problem of alloy powder agglomeration caused by poor infiltration of the alloy powder in the molten steel is solved, and the rapid and uniform dispersion of the oxygen supersaturated precursor powder in the molten steel is facilitated.
Description
Technical Field
The invention relates to the technical field of special material preparation, in particular to a preparation method of oxygen supersaturated precursor powder for nano oxide dispersion strengthened steel.
Background
Dispersion strengthening is one of material strengthening modes, and compared with strengthening modes such as solid solution strengthening, strain strengthening, precipitation strengthening, fine grain strengthening and the like, the dispersion strengthening breaks through the limit of recrystallization of materials, and still keeps the strengthening effect under the condition of being close to a melting point. Oxide dispersion strengthened steel (ODS steel) is an important one of dispersion strengthened materials. The small and uniformly distributed oxide dispersed phases in the ODS steel can not only remarkably improve the high-temperature creep strength of the steel, but also be used as nucleation sites of micro helium bubbles, so that transmutation helium generated by high-energy neutron irradiation is distributed into a larger number of micro helium bubbles, and the irradiation swelling resistance of the steel is remarkably improved, therefore, the ODS steel is considered as one of the most promising irradiation-resistant nuclear power steels.
The main method for preparing the oxide dispersion strengthening alloy is mechanical alloying and powder metallurgy forming. The method can successfully prepare the oxide dispersion strengthened alloy, but consumes time and energy, is not easy to prepare in large batch and is difficult to realize engineering application. The smelting method becomes an effective way for realizing the mass preparation of ODS steel. However, in order to obtain high number density of oxides in the alloy, it is required that the content of dissolved oxygen in the steel be about 1000ppm, the saturated oxygen content in the molten steel be about 2000ppm, and the oxygen concentration in the solidified alloy be generally not more than 30ppm, and too high dissolved oxygen causes bubbles or inclusions to be formed in the alloy during the solidification process, thereby significantly reducing the properties of the alloy.
At present, introducing solid-phase oxygen into molten steel in a manner of adding oxygen-containing alloy powder becomes a main way for preparing ODS steel by a smelting method, and patent CN201410473694.0 (China) proposes that preparation of ODS steel is realized by directly adding yttrium oxide into the molten steel for smelting; patent CN201510808687.6 (china) obtains oxide dispersion strengthened steel by adding iron oxide and rare earth element into molten steel and casting rapidly, and reacting the iron oxide with the rare earth element. However, because the density of the oxide is smaller than that of the molten steel, and the wetting angle of the oxide with the molten steel is large, the oxide directly added is easy to cause segregation or float upwards to form slag due to the density difference, and the uniform distribution of the oxide is difficult to realize. In patent CN107541666B (China), oxygen saturation alloy powder prepared by mechanical alloying is added into molten steel, the characteristics of similar density of the alloy powder and the molten steel are utilized to realize uniform mixing, and uniform dispersion and precipitation of nano oxides are realized by stirring and rapid cooling; however, the density of the alloy added into the alloy powder is lower than that of pure iron, the density of the alloy powder and the molten steel still has a certain difference, and the wettability between the alloy powder and the molten steel is not obviously improved, the wetting angle of the supersaturated oxide dispersion alloy powder prepared in the first step (1) of the embodiment and the T91 martensitic steel is 101 degrees according to the national standard GB/T22638, and the wetting angle of the supersaturated oxide dispersion alloy powder prepared in the second step (1) of the embodiment and the T91 martensitic steel is 97 degrees.
Disclosure of Invention
The invention aims to solve the technical problem of providing a preparation method of oxygen supersaturated precursor powder for nano oxide dispersion strengthened steel, which has small density difference with target molten steel and better wettability.
In order to solve the technical problems, the invention adopts the following technical scheme: a preparation method of oxygen supersaturated precursor powder for nano oxide dispersion strengthened steel comprises the following steps:
(1) mixing atomized chromium powder, atomized titanium powder, atomized tungsten powder, atomized yttrium powder, yttrium oxide powder and atomized iron powder to obtain composite alloy powder;
(2) adding the composite alloy powder obtained in the step (1) into a stirring ball mill, and performing ball milling treatment under the protection of argon to obtain oxygen supersaturated alloy powder;
(3) and (3) placing the oxygen supersaturated alloy powder obtained in the step (2) in an argon protective environment, and cooling to obtain the oxygen supersaturated precursor powder for the nano oxide dispersion strengthened steel.
Furthermore, the amount of each raw material is, by mass, 9-14% of atomized chromium powder, 3-6% of atomized titanium powder, 0-8% of atomized tungsten powder, 1-4% of atomized yttrium powder, 5-20% of yttrium trioxide powder, and the balance of atomized iron powder. In the process of implementing the invention, the inventor finds that the solid solution of oxygen can be ensured by adopting the comparison, and simultaneously, the components are ensured to be as close as possible to the components of the target molten steel.
Furthermore, the mesh number of the atomized chromium powder, the atomized titanium powder, the atomized tungsten powder, the atomized yttrium powder, the yttrium trioxide powder and the atomized iron powder is 100-300 meshes. Thus, the alloy powder can be ensured to be uniform, and the ball milling is convenient.
Further, the mass ratio of the grinding balls in the stirring ball mill to the composite alloy powder is 10-20: 1. In the course of practicing the present invention, the inventors have found that ball milling is better in quality.
Further, the ball milling treatment time is 4-6 h, the rotating speed is 250-400 r/min, and the temperature is not more than 60 ℃. In the process of implementing the invention, the inventor finds that the design can realize the solid solution of oxygen in the yttrium oxide without overlong ball milling time.
Further, the mass percent of oxygen in the oxygen supersaturated precursor powder for the nano oxide dispersion strengthened steel is 1-4%. To ensure that sufficient oxygen is provided.
Further, the density of the oxygen supersaturated precursor powder for the nano-oxide dispersion strengthened steel is adjusted to 7.0-8.5 g/cm by adjusting the content of the atomized tungsten powder3. The design ensures that the density of the alloy powder is basically consistent after the alloy powder is added into molten steel and is convenient to disperse, and the difference between the density of the alloy powder and the density of pure iron is 10 percent.
The oxygen supersaturated precursor powder for the nano oxide dispersion strengthened steel can be directly added into molten steel to prepare the nano oxide dispersion strengthened steel, and has the beneficial effects that:
1. in the invention, as the density of the atomized tungsten powder is far greater than that of other raw materials, the change of the content of the atomized tungsten powder has the greatest influence on the density of the finally obtained oxygen supersaturated precursor powder for the nano oxide dispersion strengthened steel, so that the density of the precursor powder can be adjusted by adjusting the content of the atomized tungsten powder, and the density difference between the precursor powder and the target molten steel is ensured to be not more than 10 percent, thereby solving the problem of floating up and slagging of the oxide caused by overlarge density difference between the oxide and the molten steel in the smelting process and being beneficial to the uniform regulation and control of the oxygen supersaturated precursor powder in the molten steel;
2. the inventors find that the surface activity of alloy powder can be effectively improved by adding atomized yttrium powder, the infiltration angle between the finally obtained oxygen supersaturated precursor powder for nano oxide dispersion strengthened steel and matrix molten steel is less than 90 degrees, the problem of alloy powder agglomeration caused by poor infiltration of the alloy powder in the molten steel is solved, and the rapid and uniform dispersion of the oxygen supersaturated precursor powder in the molten steel is facilitated.
3. The method has simple process and high efficiency, is suitable for industrial production, realizes the supersaturated solid solution of oxygen in oxide in matrix alloy powder through mechanical alloying, solves the problems of segregation and uneven distribution caused by the direct addition of the oxide in molten steel in the smelting process and poor density difference and wettability, avoids the problems of cavities and inclusions caused by the direct introduction of oxygen in the molten steel, and the segregation or floating-up slag formation caused by the direct addition of the oxide alloy powder, and lays a foundation for the smelting method to realize the preparation of the oxide dispersion strengthened steel.
Detailed Description
The invention is further described below with reference to the following examples:
the various starting materials used in the following examples are all commercially available products known in the art unless otherwise specified.
Example 1
Preparation of oxygen supersaturated precursor powder for nano-oxide dispersion strengthened steel
(1) Weighing 9% of atomized chromium powder, 3% of atomized titanium powder, 1% of atomized yttrium powder, 5% of yttrium oxide powder and 82% of atomized iron powder according to mass percentage, wherein the mesh number of the atomized chromium powder, the atomized titanium powder, the atomized yttrium powder, the yttrium oxide powder and the atomized iron powder is 100-300 meshes, the purity is more than 99.5%, and mixing to obtain composite alloy powder;
(2) adding the composite alloy powder obtained in the step (1) into a stirring ball mill, wherein the mass ratio of grinding balls in the stirring ball mill to the composite alloy powder is 10:1, then introducing circulating argon, opening circulating cooling water, and carrying out ball milling treatment under the protection of argon, wherein the ball milling treatment time is 6 hours, the rotating speed is 250r/min, the temperature is not more than 60 ℃, and oxygen supersaturated alloy powder is obtained after ball milling treatment;
(3) and (3) naturally cooling the oxygen supersaturated alloy powder obtained in the step (2) for 3 hours in an argon-protected room temperature environment to obtain oxygen supersaturated precursor powder for the nano-oxide dispersion strengthened steel.
The oxygen supersaturated precursor powder for nano-oxide dispersion strengthened steel prepared in the embodiment has an oxygen content of 1 wt.% measured according to national standard GB/T5158; the density of the product is 7.5g/cm according to the national standard GB/T51613(ii) a The infiltration angle of the steel with T91 martensite steel is measured to be 87 degrees according to the national standard GB/T22638.
Example 2
Preparation of oxygen supersaturated precursor powder for nano-oxide dispersion strengthened steel
(1) Weighing 9% of atomized chromium powder, 9% of atomized titanium powder, 8% of atomized tungsten powder, 1% of atomized yttrium powder, 20% of yttrium trioxide powder and 59% of atomized iron powder according to mass percentage, wherein the mesh number of the atomized chromium powder, the atomized titanium powder, the atomized tungsten powder, the atomized yttrium powder, the yttrium trioxide powder and the atomized iron powder is 100-300 meshes, the purity is more than 99.5%, and mixing to obtain composite alloy powder;
(2) adding the composite alloy powder obtained in the step (1) into a stirring ball mill, wherein the mass ratio of grinding balls in the stirring ball mill to the composite alloy powder is 20:1, then introducing circulating argon, opening circulating cooling water, and carrying out ball milling treatment under the protection of argon, wherein the ball milling treatment time is 4 hours, the rotating speed is 400r/min, the temperature is not more than 60 ℃, and oxygen supersaturated alloy powder is obtained after ball milling treatment;
(3) and (3) placing the oxygen supersaturated alloy powder obtained in the step (2) in an argon-protected room-temperature environment for natural cooling for 2h to obtain oxygen supersaturated precursor powder for nano-oxide dispersion strengthened steel.
The oxygen supersaturated precursor powder for nano-oxide dispersion strengthened steel prepared in the example has an oxygen content of 4 wt.% according to the national standard GB/T5158 and a density of 8.0g/cm according to the national standard GB/T51613(ii) a The infiltration angle of the steel with T91 martensite steel is 89 degrees measured according to the national standard GB/T22638.
Example 3
Preparation of oxygen supersaturated precursor powder for nano-oxide dispersion strengthened steel
(1) Weighing 12% of atomized chromium powder, 5% of atomized titanium powder, 4% of atomized tungsten powder, 2% of atomized yttrium powder, 13% of yttrium trioxide powder and 64% of atomized iron powder according to mass percentage, wherein the mesh number of the atomized chromium powder, the atomized titanium powder, the atomized tungsten powder, the atomized yttrium powder, the yttrium trioxide powder and the atomized iron powder is 100-300 meshes, the purity is more than 99.5%, and mixing to obtain composite alloy powder;
(2) adding the composite alloy powder obtained in the step (1) into a stirring ball mill, wherein the mass ratio of grinding balls in the stirring ball mill to the composite alloy powder is 15:1, then introducing circulating argon, opening circulating cooling water, and carrying out ball milling treatment under the protection of argon, wherein the ball milling treatment time is 5 hours, the rotating speed is 300r/min, the temperature is not more than 60 ℃, and oxygen supersaturated alloy powder is obtained after ball milling treatment;
(3) and (3) naturally cooling the oxygen supersaturated alloy powder obtained in the step (2) for 3 hours in an argon-protected room temperature environment to obtain oxygen supersaturated precursor powder for the nano-oxide dispersion strengthened steel.
The oxygen supersaturated precursor powder for nano-oxide dispersion strengthened steel prepared in the embodiment has an oxygen content of 2.7 wt.% measured according to national standard GB/T5158 and a density of 7.6g/cm measured according to national standard GB/T51613(ii) a The infiltration angle of the steel with T91 martensite steel is 82 degrees measured according to the national standard GB/T22638.
From examples 1 to 3, it can be seen that the oxygen supersaturated precursor powder for nano-oxide dispersion strengthened steel prepared by the present invention has greatly improved wettability compared with the supersaturated oxide dispersion alloy powder prepared by CN107541666B (china) in the prior art.
Example 4
Wetting property influence test of atomized yttrium powder on oxygen supersaturated precursor powder for nano-oxide dispersion strengthened steel
Atomized yttrium powder is omitted on the basis of example 3, a comparative precursor powder is prepared under the same conditions, and the infiltration angle of the precursor powder and T91 martensitic steel is 98 degrees measured according to the national standard GB/T22638. The results show that the improvement of the wettability of the invention is mainly realized by adding atomized yttrium powder.
It should be understood that the examples and embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present disclosure, and that various modifications or changes in light thereof will be suggested to persons skilled in the art and are to be included within the spirit and purview of this disclosure.
Claims (7)
1. A preparation method of oxygen supersaturated precursor powder for nano oxide dispersion strengthened steel is characterized by comprising the following steps: the method comprises the following steps:
(1) mixing atomized chromium powder, atomized titanium powder, atomized tungsten powder, atomized yttrium powder, yttrium oxide powder and atomized iron powder to obtain composite alloy powder;
(2) adding the composite alloy powder obtained in the step (1) into a stirring ball mill, and performing ball milling treatment under the protection of argon to obtain oxygen supersaturated alloy powder;
(3) and (3) placing the oxygen supersaturated alloy powder obtained in the step (2) in an argon protective environment, and cooling to obtain the oxygen supersaturated precursor powder for the nano oxide dispersion strengthened steel.
2. The method for preparing oxygen supersaturated precursor powder for nano oxide dispersion strengthened steel as claimed in claim 1, wherein: according to the mass percentage, the use amount of each raw material is 9-14% of atomized chromium powder, 3-6% of atomized titanium powder, 0-8% of atomized tungsten powder, 1-4% of atomized yttrium powder, 5-20% of yttrium trioxide powder and the balance of atomized iron powder.
3. The method for producing the oxygen supersaturated precursor powder for nano oxide dispersion strengthened steel as claimed in claim 1 or 2, wherein: the mesh number of the atomized chromium powder, the atomized titanium powder, the atomized tungsten powder, the atomized yttrium powder, the yttrium oxide powder and the atomized iron powder is 100-300 meshes.
4. The method for producing the oxygen supersaturated precursor powder for nano oxide dispersion strengthened steel as claimed in claim 1 or 2, wherein: the mass ratio of the grinding balls in the stirring ball mill to the composite alloy powder is 10-20: 1.
5. The method for producing the oxygen supersaturated precursor powder for nano oxide dispersion strengthened steel as claimed in claim 1 or 2, wherein: the ball milling treatment time is 4-6 h, the rotating speed is 250-400 r/min, and the temperature is not more than 60 ℃.
6. The method for producing the oxygen supersaturated precursor powder for nano oxide dispersion strengthened steel as claimed in claim 1 or 2, wherein: the mass percentage of oxygen in the oxygen supersaturated precursor powder for the nano oxide dispersion strengthened steel is 1-4%.
7. The method for producing the oxygen supersaturated precursor powder for nano oxide dispersion strengthened steel as claimed in claim 1 or 2, wherein: the density of the oxygen supersaturated precursor powder for the nano oxide dispersion strengthened steel is adjusted to 7.0-8.5 g/cm by adjusting the content of the atomized tungsten powder3。
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| CN112453413A (en) * | 2020-11-20 | 2021-03-09 | 中科院过程工程研究所南京绿色制造产业创新研究院 | Preparation method of oxide dispersion strengthened steel spherical powder for 3D printing |
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