Preparation method of pre-alloyed powder of gas turbine high-temperature alloy material

Abstract

The invention provides a preparation method of pre-alloyed powder of a gas turbine high-temperature alloy material. The preparation method of the pre-alloyed powder of the gas turbine high-temperature alloy material comprises the following steps: S1, uniformly mixing the powder according to the mass ratio of Fe: C: Co: Ni: Nb = 24.6: 0.6: 35.6: 32.6: 6.7, and grinding in a horizontal high-energy ball mill; s2, after grinding is completed, the materials are taken out and dried, and (Fe, Ni) solid solution powder is obtained; and S3, uniformly mixing Mo, Cr and W according to the mass ratio of 36.9: 55.4: 7.7, and grinding in a horizontal high-energy ball mill. According to the preparation method of the pre-alloyed powder of the gas turbine high-temperature alloy material, the pre-alloyed powder is prepared through a mechanical alloying method, and compared with atomized powder commonly used in engineering, the mechanical alloying powder obtained through the preparation method achieves complete solid solution of the Mo element; the method has the characteristics of high energy storage, fine grains, uniform structure, capability of reducing the sintering temperature during alloy preparation and the like, and can ensure the preparation application of special engineering materials.

Description

Technical Field

[0001] The invention relates to the field of powder metallurgy, and in particular to a method for preparing pre-alloyed powder of a combustion engine high-temperature alloy material. Background Art

[0002] Multi-principal iron-nickel-based supersaturated solid solution pre-alloyed powder is mainly used for the preparation of special metallurgical structural parts and can be used for the preparation of high-temperature alloys for gas turbine lock keys. The first problem to be solved in the preparation of high-performance high-temperature alloy materials using mechanical alloying pre-alloyed powder is to obtain a multi-principal iron-nickel-based supersaturated solid solution with uniform structure and fine grains.

[0003] The key to preparing this alloy material with high temperature resistance and excellent mechanical properties is to achieve complete solid solution of Mo element with a content of up to 10% in (Fe, Ni) solid solution. Only by achieving complete solid solution of Mo element with a content of up to 10% in (Fe, Ni) solid solution can the difficult-to-dissolve elements exert a more effective precipitation or reaction precipitation strengthening effect during sintering.

[0004] Therefore, it is necessary to provide a method for preparing pre-alloyed powder of a combustion engine high-temperature alloy material to solve the above technical problems. Summary of the invention

[0005] The invention provides a method for preparing pre-alloyed powder of a combustion engine high-temperature alloy material, which solves the problems in the background technology.

[0006] In order to solve the above technical problems, the present invention provides a method for preparing pre-alloyed powder of a combustion engine high temperature alloy material, comprising the following steps:

[0007] S1. Mix the powders evenly according to the mass ratio of Fe:C:Co:Ni:Nb=24.6:0.6:35.6:32.6:6.7, and grind them in a horizontal high-energy ball mill;

[0008] S2. After grinding, the material is taken out and dried to obtain (Fe, Ni) solid solution powder;

[0009] S3, after mixing evenly with a mass ratio of Mo:Cr:W=36.9:55.4:7.7, put it into a horizontal high-energy ball mill for grinding;

[0010] S4, after the grinding is completed, it is dried and taken out to obtain MoCrW solid solution powder;

[0011] S5. Mix the powders uniformly according to the mass ratio of (Fe, Ni) solid solution powder: MoCrW solid solution powder = 67.5:32.5, and grind them in a horizontal high-energy ball mill;

[0012] S6. After grinding, the powder is dried at a vacuum degree of -0.8 to -0.9 MPa, and the powder is taken out after being inerted in a glove box filled with an inert gas argon to obtain a multi-principal element iron-nickel based supersaturated solid solution pre-alloyed powder.

[0013] Preferably, the grinding time in S1 is 16 to 18 hours, and the rotation speed of the horizontal high-energy ball mill is 100 to 300 r / min.

[0014] Preferably, the grinding time in S3 is 22 to 24 hours, and the rotation speed of the horizontal high-energy ball mill is 150 to 280 r / min.

[0015] Preferably, the grinding time in S5 is 24 to 26 hours, and the rotation speed of the horizontal high-energy ball mill is 260 to 320 r / min.

[0016] Preferably, the drying temperature in S6 is 60-80° C., and the drying time is 2-6 hours.

[0017] Preferably, the flow rate of the inert gas argon in S6 is 1 to 3 L / min.

[0018] Preferably, the method further comprises: screening the pre-alloyed powder obtained in S6 through a vibrating screen to remove coarse particles and impurities therein to obtain pre-alloyed powder with uniform particle size.

[0019] Preferably, the mesh size of the vibration screen is 50 to 100 meshes.

[0020] Preferably, the method further comprises: packaging the screened pre-alloyed powder for easy storage and transportation.

[0021] Compared with the related art, the method for preparing pre-alloyed powder of combustion engine high temperature alloy material provided by the present invention has the following beneficial effects:

[0022] The present invention provides a method for preparing pre-alloyed powder of a combustion engine high-temperature alloy material. The present invention adopts a mechanical alloying method to prepare the pre-alloyed powder. Compared with the atomized powder commonly used in engineering, the mechanical alloyed powder obtained by the present invention realizes the complete solid solution of the Mo element, has the characteristics of high energy storage, fine grains, uniform structure, and can reduce the sintering temperature when preparing the alloy, and can ensure the use of special engineering material preparation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The present invention is a schematic flow chart of a preferred embodiment of the method for preparing pre-alloyed powder of combustion engine high-temperature alloy material provided by the present invention. DETAILED DESCRIPTION

[0024] The present invention will be further described below in conjunction with the accompanying drawings and implementation modes.

[0025] Please refer to Figure 1 ,in, Figure 1 The present invention is a schematic flow chart of a preferred embodiment of the method for preparing pre-alloyed powder of combustion engine high-temperature alloy material provided by the present invention.

[0026] Embodiment 1: A method for preparing pre-alloyed powder of a combustion engine high temperature alloy material comprises the following steps:

[0027] S1. Mix the powders evenly according to the mass ratio of Fe:C:Co:Ni:Nb=24.6:0.6:35.6:32.6:6.7, and grind them in a horizontal high-energy ball mill for 16 hours at a rotation speed of 100 r / min.

[0028] S2. After grinding, the material is taken out and dried to obtain (Fe, Ni) solid solution powder;

[0029] S3, after mixing evenly with a mass ratio of Mo:Cr:W=36.9:55.4:7.7, put it into a horizontal high-energy ball mill for grinding, the grinding time is 24 hours, and the rotation speed of the horizontal high-energy ball mill is 150r / min;

[0030] S4, after the grinding is completed, it is dried and taken out to obtain MoCrW solid solution powder;

[0031] S5. Mix the powders uniformly at a mass ratio of (Fe, Ni) solid solution powder: MoCrW solid solution powder = 67.5:32.5, and grind them in a horizontal high-energy ball mill for 24 hours at a rotation speed of 260 r / min.

[0032] S6. After grinding, the powder is dried under a vacuum degree of -0.8 MPa, the drying temperature is 60°C, the drying time is 2 h, the powder is inerted in a glove box filled with an inert gas argon, and the flow rate of the inert gas argon is 1 L / min, to obtain a multi-principal iron-nickel based supersaturated solid solution pre-alloyed powder.

[0033] The (Fe, Ni) supersaturated solid solution powder is used as the A atom in the A / B diffusion couple, and the MoCrW supersaturated solid solution is used as the B atom. After the two are mixed, they are subjected to secondary mechanical alloying grinding to achieve a complete solid solution of more than 10% Mo element. This mechanical alloying powder has the characteristics of high energy storage, fine grains, and interface sintering. It can provide high-quality pre-alloyed powder for the preparation of high-temperature alloys and reduce the sintering temperature (800-900°C).

[0034] The method also includes: screening the pre-alloyed powder obtained by S6 through a vibrating screen to remove coarse particles and impurities therein to obtain pre-alloyed powder with uniform particle size.

[0035] The mesh number of the vibration screen is 50 meshes.

[0036] The method also includes: packaging the screened pre-alloyed powder for easy storage and transportation.

[0037] Embodiment 2: A method for preparing pre-alloyed powder of a combustion engine high temperature alloy material comprises the following steps:

[0038] S1. Mix the powders evenly according to the mass ratio of Fe:C:Co:Ni:Nb=24.6:0.6:35.6:32.6:6.7, and grind them in a horizontal high-energy ball mill for 16 hours at a rotation speed of 200 r / min.

[0039] S2. After grinding, the material is taken out and dried to obtain (Fe, Ni) solid solution powder;

[0040] S3, after mixing evenly with a mass ratio of Mo:Cr:W=36.9:55.4:7.7, put it into a horizontal high-energy ball mill for grinding, the grinding time is 22 hours, and the rotation speed of the horizontal high-energy ball mill is 180r / min;

[0041] S4, after the grinding is completed, it is dried and taken out to obtain MoCrW solid solution powder;

[0042] S5. Mix the powders uniformly at a mass ratio of (Fe, Ni) solid solution powder: MoCrW solid solution powder = 67.5:32.5, and grind them in a horizontal high-energy ball mill for 24 hours at a rotation speed of 260 r / min.

[0043] S6. After grinding, the powder is dried under a vacuum degree of -0.8 MPa, the drying temperature is 70°C, the drying time is 3 hours, and the powder is taken out after being inerted in a glove box filled with inert gas argon. The flow rate of the inert gas argon is 1 L / min to obtain a multi-principal iron-nickel based supersaturated solid solution pre-alloyed powder.

[0044] The method also includes: screening the pre-alloyed powder obtained by S6 through a vibrating screen to remove coarse particles and impurities therein to obtain pre-alloyed powder with uniform particle size.

[0045] The mesh number of the vibration screen is 50 meshes.

[0046] The method also includes: packaging the screened pre-alloyed powder for easy storage and transportation.

[0047] Embodiment 3: A method for preparing pre-alloyed powder of a combustion engine high temperature alloy material comprises the following steps:

[0048] S1. Mix the powders evenly according to the mass ratio of Fe:C:Co:Ni:Nb=24.6:0.6:35.6:32.6:6.7, and grind them in a horizontal high-energy ball mill for 18 hours at a rotation speed of 200 r / min.

[0049] S2. After grinding, the material is taken out and dried to obtain (Fe, Ni) solid solution powder;

[0050] S3, after mixing the materials with a mass ratio of Mo:Cr:W=36.9:55.4:7.7 uniformly, put them into a horizontal high-energy ball mill for grinding for 23 hours at a rotation speed of 200 r / min;

[0051] S4, after the grinding is completed, it is dried and taken out to obtain MoCrW solid solution powder;

[0052] S5. Mix the powders uniformly at a mass ratio of (Fe, Ni) solid solution powder: MoCrW solid solution powder = 67.5:32.5, and grind them in a horizontal high-energy ball mill for 25 hours at a rotation speed of 320 r / min.

[0053] S6. After grinding, the powder is dried under a vacuum degree of -0.9 MPa, the drying temperature is 70°C, the drying time is 4 hours, and the powder is taken out after being inerted in a glove box filled with inert gas argon. The flow rate of the inert gas argon is 2 L / min to obtain a multi-principal iron-nickel based supersaturated solid solution pre-alloyed powder.

[0054] The method also includes: screening the pre-alloyed powder obtained by S6 through a vibrating screen to remove coarse particles and impurities therein to obtain pre-alloyed powder with uniform particle size.

[0055] The mesh number of the vibration screen is 80 meshes.

[0056] The method also includes: packaging the screened pre-alloyed powder for easy storage and transportation.

[0057] Embodiment 4: A method for preparing pre-alloyed powder of a combustion engine high temperature alloy material comprises the following steps:

[0058] S1. Mix the powders evenly according to the mass ratio of Fe:C:Co:Ni:Nb=24.6:0.6:35.6:32.6:6.7, and grind them in a horizontal high-energy ball mill for 18 hours at a rotation speed of 300 r / min.

[0059] S2. After grinding, the material is taken out and dried to obtain (Fe, Ni) solid solution powder;

[0060] S3, after mixing the mass ratio of Mo:Cr:W=36.9:55.4:7.7 evenly, put it into a horizontal high-energy ball mill for grinding, the grinding time is 24h, and the rotation speed of the horizontal high-energy ball mill is 280r / min;

[0061] S4, after the grinding is completed, it is dried and taken out to obtain MoCrW solid solution powder;

[0062] S5. Mix the powders uniformly at a mass ratio of (Fe, Ni) solid solution powder: MoCrW solid solution powder = 67.5:32.5, and grind them in a horizontal high-energy ball mill for 26 hours at a rotation speed of 320 r / min.

[0063] S6. After grinding, the powder is dried under a vacuum degree of -0.9 MPa, the drying temperature is 80°C, the drying time is 6 hours, and the powder is taken out after being inerted in a glove box filled with inert gas argon. The flow rate of the inert gas argon is 3 L / min, and a multi-principal iron-nickel based supersaturated solid solution pre-alloyed powder is obtained.

[0064] The method also includes: screening the pre-alloyed powder obtained by S6 through a vibrating screen to remove coarse particles and impurities therein to obtain pre-alloyed powder with uniform particle size.

[0065] The mesh number of the vibration screen is 100 meshes.

[0066] The method also includes: packaging the screened pre-alloyed powder for easy storage and transportation.

[0067] The working principle of the method for preparing the pre-alloyed powder of the combustion engine high temperature alloy material provided by the present invention is as follows:

[0068] First, the powders are mixed evenly according to a mass ratio of Fe:C:Co:Ni:Nb=24.6:0.6:35.6:32.6:6.7, and are put into a horizontal high-energy ball mill for grinding; after the grinding is completed, the materials are taken out and dried to obtain (Fe, Ni) solid solution powder; then, the mass ratio of Mo:Cr:W=36.9:55.4:7.7 is mixed evenly, and the powders are put into a horizontal high-energy ball mill for grinding; after the grinding is completed, the powders are dried and taken out to obtain MoCrW solid solution powder; then, the powders are mixed evenly according to a mass ratio of (Fe, Ni) solid solution powder: MoCrW solid solution powder=67.5:32.5, and the powders are put into a horizontal high-energy ball mill for grinding; after the grinding is completed, the powders are dried under a vacuum degree of -0.8 to -0.9 MPa, and the powders are taken out after being inerted in a glove box filled with inert gas argon to obtain a multi-principal element iron-nickel based supersaturated solid solution pre-alloy powder.

[0069] Compared with the related art, the method for preparing pre-alloyed powder of combustion engine high temperature alloy material provided by the present invention has the following beneficial effects:

[0070] The present invention is prepared by a mechanical alloying method. Compared with the atomized powder commonly used in engineering, the mechanical alloying powder obtained by the present invention realizes the complete solid solution of the Mo element, has the characteristics of high energy storage, fine grains, uniform structure, and can reduce the sintering temperature when preparing the alloy, and can ensure the use of special engineering material preparation.

[0071] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A method for preparing pre-alloyed powder of a combustion engine high temperature alloy material, characterized in that: The following steps are involved: S1. Mix the powders evenly according to the mass ratio of Fe:C:Co:Ni:Nb=24.6:0.6:35.6:32.6:6.7, and grind them in a horizontal high-energy ball mill; S2. After grinding, the material is taken out and dried to obtain (Fe, Ni) solid solution powder; S3, after mixing evenly with a mass ratio of Mo:Cr:W=36.9:55.4:7.7, put it into a horizontal high-energy ball mill for grinding; S4, after the grinding is completed, it is dried and taken out to obtain MoCrW solid solution powder; S5. Mix the powders uniformly according to the mass ratio of (Fe, Ni) solid solution powder: MoCrW solid solution powder = 67.5:32.5, and grind them in a horizontal high-energy ball mill; S6. After grinding, the powder is dried at a vacuum degree of -0.8 to -0.9 MPa, and the powder is taken out after being inerted in a glove box filled with an inert gas argon to obtain a multi-principal element iron-nickel based supersaturated solid solution pre-alloyed powder.

2. The method for preparing pre-alloyed powder of combustion engine high temperature alloy material according to claim 1, characterized in that: The grinding time in S1 is 16 to 18 hours, and the rotation speed of the horizontal high-energy ball mill is 100 to 300 r / min.

3. The method for preparing pre-alloyed powder of combustion engine high temperature alloy material according to claim 1, characterized in that: The grinding time in S3 is 22 to 24 hours, and the rotation speed of the horizontal high-energy ball mill is 150 to 280 r / min.

4. The method for preparing pre-alloyed powder of combustion engine high temperature alloy material according to claim 1, characterized in that: The grinding time in S5 is 24 to 26 hours, and the rotation speed of the horizontal high-energy ball mill is 260 to 320 r / min.

5. The method for preparing pre-alloyed powder of combustion engine high temperature alloy material according to claim 1, characterized in that: In the step S6, the drying temperature is 60 to 80° C. and the drying time is 2 to 6 hours.

6. The method for preparing pre-alloyed powder of combustion engine high temperature alloy material according to claim 1, characterized in that: The flow rate of the inert gas argon in S6 is 1 to 3 L / min.

7. The method for preparing pre-alloyed powder of combustion engine high temperature alloy material according to claim 1, characterized in that: Also includes: The pre-alloyed powder prepared by S6 is sieved through a vibrating screen to remove coarse particles and impurities therein to obtain a pre-alloyed powder with uniform particle size.

8. The method for preparing pre-alloyed powder of combustion engine high temperature alloy material according to claim 7, characterized in that: The mesh number of the vibration screen is 50 to 100 meshes.

9. The method for preparing pre-alloyed powder of combustion engine high temperature alloy material according to claim 7, characterized in that: Also includes: The screened pre-alloyed powder is packaged for easy storage and transportation.

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