CN111804889A - Preparation process of composite material - Google Patents
Preparation process of composite material Download PDFInfo
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- CN111804889A CN111804889A CN202010711950.0A CN202010711950A CN111804889A CN 111804889 A CN111804889 A CN 111804889A CN 202010711950 A CN202010711950 A CN 202010711950A CN 111804889 A CN111804889 A CN 111804889A
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- amorphous alloy
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- alloy rod
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- hard metal
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D19/00—Casting in, on, or around objects which form part of the product
- B22D19/16—Casting in, on, or around objects which form part of the product for making compound objects cast of two or more different metals, e.g. for making rolls for rolling mills
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D23/00—Casting processes not provided for in groups B22D1/00 - B22D21/00
- B22D23/06—Melting-down metal, e.g. metal particles, in the mould
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Abstract
The embodiment of the invention discloses a preparation process of a composite material, which is used for solving the technical problem that the existing hard alloy is difficult to process into a complex structure due to high melting point. The embodiment of the invention comprises the following steps: s1, placing the hard metal rod or the hard alloy rod and the amorphous alloy rod in a preset cavity for mixing to form a mixed material; s2, heating the mixed material to the temperature range of the supercooled liquid region of the amorphous alloy rod; s3, enabling the amorphous alloy rod to flow in a semi-solid state by applying pressure, and driving the hard metal rod or the hard alloy rod mixed with the amorphous alloy rod to deform to the shape of the preset cavity; and S4, cooling the mixed material to obtain the composite material.
Description
Technical Field
The invention relates to the technical field of material preparation, in particular to a preparation process of a composite material.
Background
Because the hard metal and the hard alloy have higher hardness and higher melting point, the finished product is generally in a bar or wire form at present, if the hard metal or the hard alloy is required to be processed into a structure with certain shape characteristics, the hard metal or the hard alloy is generally produced by adopting a powder metallurgy method, and the working procedures comprise powder making, compression molding and sintering. The above-mentioned method is complicated, and because the melting point of the hard metal or the hard alloy is high, the hard metal or the hard alloy is difficult to process into a relatively complicated structure, and the hard metal or the hard alloy has high brittleness, and edge breakage is easily caused during CNC processing, so that the feasibility of processing into a complicated shape by a material removing processing method such as CNC is also low.
Therefore, in order to solve the above technical problems, the search for a composite material preparation process is an important issue studied by those skilled in the art.
Disclosure of Invention
The embodiment of the invention discloses a preparation process of a composite material, which is used for solving the technical problem that the existing hard alloy is difficult to process into a complex structure due to high melting point.
The embodiment of the invention provides a preparation process of a composite material, which comprises the following steps:
s1, placing the hard metal rod or the hard alloy rod and the amorphous alloy rod in a preset cavity for mixing to form a mixed material;
s2, heating the mixed material to the temperature range of the supercooled liquid region of the amorphous alloy rod;
s3, enabling the amorphous alloy rod to flow in a semi-solid state by applying pressure, and driving the hard metal rod or the hard alloy rod mixed with the amorphous alloy rod to deform to the shape of the preset cavity;
and S4, cooling the mixed material to obtain the composite material.
Optionally, in step S2, the heating temperature of the mixed material is in a range of 200 ℃ to 600 ℃.
Optionally, the diameter of the hard metal rod ranges from 0.1mm to 10mm, the diameter of the cemented carbide rod ranges from 0.1mm to 10mm, and the diameter of the amorphous alloy rod ranges from 0.1mm to 10 mm; the diameter ratio of the hard metal rod or the hard alloy rod to the amorphous alloy rod ranges from 1:1 to 15: 1; the volume ratio of the hard metal rod or the hard alloy rod to the amorphous alloy rod ranges from 1:1 to 10: 1.
Optionally, the hard metal rod and the cemented carbide rod have a density greater than 8g/cm3The hardness is more than 500 HV.
Optionally, the hard metal rod comprises one of tungsten, molybdenum, tantalum, nickel, cobalt, niobium;
the hard alloy rod comprises one of tungsten carbide, titanium carbide, tantalum carbide and niobium carbide;
the amorphous alloy rod comprises one of rare earth-based amorphous alloy, copper-based amorphous alloy, zirconium-based amorphous alloy, titanium-based amorphous alloy, nickel-based amorphous alloy and cobalt-based amorphous alloy.
Optionally, the step S3 specifically includes:
the method comprises the steps of enabling an amorphous alloy rod to flow in a semi-solid state by means of pressure application, driving a hard metal rod or a hard alloy rod mixed with the amorphous alloy rod to deform to the shape of a preset cavity, applying ultrasonic vibration to a forming part of a mixed material in the cavity, wherein the frequency range of ultrasonic is 10kHHz to 100kHz, when the diameter of the amorphous alloy rod, the hard metal rod or the hard alloy rod is 0.1mm to 5mm, the ultrasonic with the frequency range of 40kHz to 100kHz is used, and when the diameter of the amorphous alloy rod, the hard metal rod or the hard alloy rod is 5mm to 10mm, the ultrasonic with the frequency range of 10kHz to 50kHz is used.
Optionally, the step S3 specifically includes:
enabling the amorphous alloy rod to flow in a semi-solid state in a segmented pressure applying mode, and driving the hard metal rod or the hard alloy rod mixed with the amorphous alloy rod to deform to the shape of a preset cavity together;
the first stage pressure is F1 which enables the amorphous alloy rod to flow in a superplastic state, the pressure is applied for T1, the second stage pressure is F2 which is applied after the superplastic state of the amorphous alloy is ended, and the pressure is applied for T2, wherein F2 is more than 1.2 XF 1, and T2 is more than 0.3 XT 1.
According to the technical scheme, the embodiment of the invention has the following advantages:
the embodiment of the invention provides a preparation process of a composite material, which comprises S1, mixing a hard metal rod or a hard alloy rod with an amorphous alloy rod in a preset cavity to form a mixed material; s2, heating the mixed material to the temperature range of the supercooled liquid region of the amorphous alloy rod; s3, enabling the amorphous alloy rod to flow in a semi-solid state by applying pressure, and driving the hard metal rod or the hard alloy rod mixed with the amorphous alloy rod to deform to the shape of the preset cavity; and S4, cooling the mixed material to obtain the composite material. In the embodiment, the amorphous alloy rod is used as the adhesive, the amorphous alloy rod is molded at low temperature and low pressure by utilizing the characteristic of superplastic deformation of the amorphous alloy rod, when the hard metal or the hard alloy is molded into a complex part, the hard metal or the hard alloy does not need to be heated to be higher than the melting point of the complex part, the amorphous alloy rod flows in a semi-solid state only by applying pressure to drive the hard metal rod or the hard alloy rod mixed with the amorphous alloy rod to deform to the shape of a preset cavity together, and then the mixed material is cooled to obtain the composite material with a more complex structure.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a schematic flow chart of a composite material preparation process provided in an embodiment of the present invention.
Detailed Description
The embodiment of the invention discloses a preparation process of a composite material, which is used for solving the technical problem that the existing hard alloy is difficult to process into a complex structure due to high melting point.
In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
Referring to fig. 1, a process for preparing a composite material provided in this embodiment includes the following steps:
s1, placing the hard metal rod or the hard alloy rod and the amorphous alloy rod in a preset cavity for mixing to form a mixed material;
s2, heating the mixed material to the temperature range of the supercooled liquid region of the amorphous alloy rod;
s3, enabling the amorphous alloy rod to flow in a semi-solid state by applying pressure, and driving the hard metal rod or the hard alloy rod mixed with the amorphous alloy rod to deform to the shape of the preset cavity;
and S4, cooling the mixed material to obtain the composite material.
It should be noted that the pressure applying manner in the present embodiment may be implemented by using an external pressure device (for example, a structure in which a cylinder cooperates with a pressure plate), and the present embodiment does not limit the manner of applying the pressure.
In the embodiment, the amorphous alloy rod is used as the adhesive, the amorphous alloy rod is molded at low temperature and low pressure by utilizing the characteristic of superplastic deformation of the amorphous alloy rod, when the hard metal or the hard alloy is molded into a complex part, the hard metal or the hard alloy does not need to be heated to be higher than the melting point of the complex part, the amorphous alloy rod flows in a semi-solid state only by applying pressure to drive the hard metal rod or the hard alloy rod mixed with the amorphous alloy rod to deform to the shape of a preset cavity together, and then the mixed material is cooled to obtain the composite material with a more complex structure.
Further, in the step S2, the heating temperature of the mixed material is set to be 200 ℃ to 600 ℃.
In the above heating temperature range and the temperature range of the supercooled liquid region of the amorphous alloy rod, when the mixed material is heated to 200 to 600 ℃, the amorphous alloy rod becomes a semi-solid state.
Further, the diameter of the hard metal rod ranges from 0.1mm to 10mm, the diameter of the hard alloy rod ranges from 0.1mm to 10mm, and the diameter of the amorphous alloy rod ranges from 0.1mm to 10 mm; the diameter ratio of the hard metal rod or the hard alloy rod to the amorphous alloy rod ranges from 1:1 to 15: 1; the volume ratio of the hard metal rod or the hard alloy rod to the amorphous alloy rod ranges from 1:1 to 10: 1.
Further, the density of the hard metal and cemented carbide rods is greater than 8g/cm3The hardness is more than 500 HV.
Further, the hard metal rod comprises one of tungsten, molybdenum, tantalum, nickel, cobalt and niobium;
the hard alloy rod comprises one of tungsten carbide, titanium carbide, tantalum carbide and niobium carbide;
the amorphous alloy rod comprises one of rare earth-based amorphous alloy, copper-based amorphous alloy, zirconium-based amorphous alloy, titanium-based amorphous alloy, nickel-based amorphous alloy and cobalt-based amorphous alloy.
It should be noted that the hard metal rod in this embodiment may include other hard metals besides the metals described above, this embodiment is not limited, and similarly, the hard alloy rod in this embodiment may also include other hard alloys, this embodiment is not limited, the amorphous alloy rod in this embodiment may also include other amorphous alloys, and this embodiment is not limited.
Further, the step S3 specifically includes:
the method comprises the steps of enabling an amorphous alloy rod to flow in a semi-solid state by means of pressure application, driving a hard metal rod or a hard alloy rod mixed with the amorphous alloy rod to deform to the shape of a preset cavity, applying ultrasonic vibration to a forming part of a mixed material in the cavity, wherein the frequency range of ultrasonic is 10kHHz to 100kHz, when the diameter of the amorphous alloy rod, the hard metal rod or the hard alloy rod is 0.1mm to 5mm, the ultrasonic with the frequency range of 40kHz to 100kHz is used, and when the diameter of the amorphous alloy rod, the hard metal rod or the hard alloy rod is 5mm to 10mm, the ultrasonic with the frequency range of 10kHz to 50kHz is used.
When the mixed material is heated and pressurized, ultrasonic oscillation can be performed on part of the formed mixed material to increase the fluidity of the semi-solid amorphous alloy rod, improve the contact area of the amorphous alloy and the hard metal or the hard alloy, improve the bonding strength of the amorphous alloy and the hard metal or the hard alloy, and improve the distribution uniformity of the hard metal or the hard alloy in the amorphous alloy.
Further, the step S3 specifically includes:
enabling the amorphous alloy rod to flow in a semi-solid state in a segmented pressure applying mode, and driving the hard metal rod or the hard alloy rod mixed with the amorphous alloy rod to deform to the shape of a preset cavity together;
the first stage pressure is F1 which enables the amorphous alloy rod to flow in a superplastic state, the pressure is applied for T1, the second stage pressure is F2 which is applied after the superplastic state of the amorphous alloy is ended, and the pressure is applied for T2, wherein F2 is more than 1.2 XF 1, and T2 is more than 0.3 XT 1.
It should be noted that, by adopting the above-mentioned way of pressurizing in sections, the gap between the hard metal or the hard alloy and the amorphous alloy can be eliminated, the bonding strength is improved, and the compactness of the product is improved. The first pressure F1 is the force that enables the amorphous alloy to flow in the superplastic state, and the second pressure F2 is the pressure that increases the densification of the composite material after the superplastic state is completed.
While the above description describes in detail a composite material preparation process provided by the present invention, for those skilled in the art, there may be variations in the specific implementation and application scope according to the ideas of the embodiments of the present invention, and in summary, the content of the present description should not be construed as limiting the present invention.
Claims (7)
1. A process for preparing a composite material, comprising:
s1, placing the hard metal rod or the hard alloy rod and the amorphous alloy rod in a preset cavity for mixing to form a mixed material;
s2, heating the mixed material to the temperature range of the supercooled liquid region of the amorphous alloy rod;
s3, enabling the amorphous alloy rod to flow in a semi-solid state by applying pressure, and driving the hard metal rod or the hard alloy rod mixed with the amorphous alloy rod to deform to the shape of the preset cavity;
and S4, cooling the mixed material to obtain the composite material.
2. The process for preparing a composite material according to claim 1, wherein the mixed material is heated at a temperature ranging from 200 ℃ to 600 ℃ in step S2.
3. The composite material preparation process according to claim 1, wherein the diameter of the hard metal rod ranges from 0.1mm to 10mm, the diameter of the cemented carbide rod ranges from 0.1mm to 10mm, and the diameter of the amorphous alloy rod ranges from 0.1mm to 10 mm; the diameter ratio of the hard metal rod or the hard alloy rod to the amorphous alloy rod ranges from 1:1 to 15: 1; the volume ratio of the hard metal rod or the hard alloy rod to the amorphous alloy rod ranges from 1:1 to 10: 1.
4. Process for the preparation of a composite material according to claim 1, characterized in that the density of said hard metal and cemented carbide bars is greater than 8g/cm3The hardness is more than 500 HV.
5. The process of claim 1, wherein the hard metal rod comprises one of tungsten, molybdenum, tantalum, nickel, cobalt, niobium;
the hard alloy rod comprises one of tungsten carbide, titanium carbide, tantalum carbide and niobium carbide;
the amorphous alloy rod comprises one of rare earth-based amorphous alloy, copper-based amorphous alloy, zirconium-based amorphous alloy, titanium-based amorphous alloy, nickel-based amorphous alloy and cobalt-based amorphous alloy.
6. The composite material preparation process according to claim 1, wherein the step S3 specifically comprises:
the method comprises the steps of enabling an amorphous alloy rod to flow in a semi-solid state by means of pressure application, driving a hard metal rod or a hard alloy rod mixed with the amorphous alloy rod to deform to the shape of a preset cavity, applying ultrasonic vibration to a forming part of a mixed material in the cavity, wherein the frequency range of ultrasonic is 10kHHz to 100kHz, when the diameter of the amorphous alloy rod, the hard metal rod or the hard alloy rod is 0.1mm to 5mm, the ultrasonic with the frequency range of 40kHz to 100kHz is used, and when the diameter of the amorphous alloy rod, the hard metal rod or the hard alloy rod is 5mm to 10mm, the ultrasonic with the frequency range of 10kHz to 50kHz is used.
7. The composite material preparation process according to claim 1, wherein the step S3 specifically comprises:
enabling the amorphous alloy rod to flow in a semi-solid state in a segmented pressure applying mode, and driving the hard metal rod or the hard alloy rod mixed with the amorphous alloy rod to deform to the shape of a preset cavity together;
the first stage pressure is F1 which enables the amorphous alloy rod to flow in a superplastic state, the pressure is applied for T1, the second stage pressure is F2 which is applied after the superplastic state of the amorphous alloy is ended, and the pressure is applied for T2, wherein F2 is more than 1.2 XF 1, and T2 is more than 0.3 XT 1.
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| CN202010711950.0A CN111804889A (en) | 2020-07-22 | 2020-07-22 | Preparation process of composite material |
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| CN202010711950.0A CN111804889A (en) | 2020-07-22 | 2020-07-22 | Preparation process of composite material |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113502426A (en) * | 2021-06-04 | 2021-10-15 | 华中科技大学 | Multi-grain-size hard alloy and preparation method thereof |
| CN114457247A (en) * | 2021-12-23 | 2022-05-10 | 广东工业大学 | Preparation method of amorphous alloy composite material |
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| US6010580A (en) * | 1997-09-24 | 2000-01-04 | California Institute Of Technology | Composite penetrator |
| WO2001081645A1 (en) * | 2000-04-24 | 2001-11-01 | California Institute Of Technology | Microstructure controlled shear band pattern formation in ductile metal/bulk metallic glass matrix composites prepared by slr processing |
| CN104640699A (en) * | 2012-07-24 | 2015-05-20 | 液态金属涂料有限公司 | Fiber-containing amorphous alloy composites |
| CN111168591A (en) * | 2020-01-17 | 2020-05-19 | 深圳大学 | Diamond grinding tool and preparation method thereof |
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2020
- 2020-07-22 CN CN202010711950.0A patent/CN111804889A/en active Pending
Patent Citations (5)
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| US5567251A (en) * | 1994-08-01 | 1996-10-22 | Amorphous Alloys Corp. | Amorphous metal/reinforcement composite material |
| US6010580A (en) * | 1997-09-24 | 2000-01-04 | California Institute Of Technology | Composite penetrator |
| WO2001081645A1 (en) * | 2000-04-24 | 2001-11-01 | California Institute Of Technology | Microstructure controlled shear band pattern formation in ductile metal/bulk metallic glass matrix composites prepared by slr processing |
| CN104640699A (en) * | 2012-07-24 | 2015-05-20 | 液态金属涂料有限公司 | Fiber-containing amorphous alloy composites |
| CN111168591A (en) * | 2020-01-17 | 2020-05-19 | 深圳大学 | Diamond grinding tool and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113502426A (en) * | 2021-06-04 | 2021-10-15 | 华中科技大学 | Multi-grain-size hard alloy and preparation method thereof |
| CN113502426B (en) * | 2021-06-04 | 2022-04-05 | 华中科技大学 | Multi-grain-size hard alloy and preparation method thereof |
| CN114457247A (en) * | 2021-12-23 | 2022-05-10 | 广东工业大学 | Preparation method of amorphous alloy composite material |
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