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Method for magnetic-field-assisted laser engineered net shaping of Al2O3-based eutectic ceramic cutting tool

A laser near-net-shaping, ceramic tool technology, applied in the field of tool manufacturing, can solve the problems of high requirements for ceramic slurry, low precision of molded parts, inconvenient machining, etc., to improve production efficiency, prevent pores and cracks, and improve Effects of thermal conductivity and mechanical strength

Active Publication Date: 2017-01-04
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It uses a constant strong magnetic field assisted colloidal forming technology to prepare textured single crystal Al 2 o 3 Ceramic parts, but this preparation method has high requirements for ceramic slurry and requires prefabricated green bodies. The subsequent steps still need to be dried and fired. The production process is cumbersome and the efficiency is not high; The blank is machined, so the precision of the formed part is not high

Method used

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  • Method for magnetic-field-assisted laser engineered net shaping of Al2O3-based eutectic ceramic cutting tool

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Using Nd:YAG solid-state continuous laser, constant strong magnetic field and pulsed magnetic field device to treat Al 2 o 3 and ZrO 2 The powder is subjected to laser near-net forming, and the specific forming steps are as follows:

[0020] A. The experimental substrate 3 is polished with sandpaper, washed with acetone, ethanol, and deionized water in sequence, and dried, and Al with a diameter of 40-90 μm is selected. 2 o 3 and ZrO 2 Powder, put the powder in an electric blast drying oven at 100°C for 4 hours, dry the ceramic powder and put it into a stable and strong magnetic field working platform and turn on the magnetic field generator, and magnetize for 60 minutes within a magnetic field strength of 15T. , and then put the ceramic powder into the powder cylinder of the powder feeder;

[0021] B. Turn on the pulsed magnetic field generator 5, set the pulsed magnetic field intensity to 15T, the duty cycle to 50%, the frequency to 15Hz, and the magnetic field d...

Embodiment 2

[0025] Using Nd:YAG solid-state continuous laser, constant strong magnetic field and pulsed magnetic field device to treat Al 2 o 3 Laser near-net forming with SiC powder, the specific forming steps are as follows:

[0026] A. The experimental substrate 3 is polished with sandpaper, washed with acetone, ethanol, and deionized water in sequence, and dried, and Al with a diameter of 40-90 μm is selected. 2 o 3 and SiC powder, put the powder in an electric blast drying oven and dry it at 100°C for 4 hours, dry the ceramic powder and put it into a working platform with a constant strong magnetic field and turn on the magnetic field generator, and magnetize it for 100 minutes in the range of a magnetic field strength of 18T . , and then put the ceramic powder into the powder cylinder of the powder feeder;

[0027] B. Turn on the pulsed magnetic field generator 5, set the pulsed magnetic field intensity to 18T, the duty cycle to 40%, the frequency to be 12Hz, and the magnetic fiel...

Embodiment 3

[0031] Using Nd:YAG solid-state continuous laser, constant strong magnetic field and pulsed magnetic field device to treat Al 2 o 3 and Si 3 N 4 The powder is subjected to laser near-net forming, and the specific forming steps are as follows:

[0032] A. The experimental substrate 3 is polished with sandpaper, washed with acetone, ethanol, and deionized water in sequence, and dried, and Al with a diameter of 40-90 μm is selected. 2 o 3 and Si 3 N 4 Powder, put the powder in an electric blast drying oven at 100°C to dry for 4 hours, dry the ceramic powder and put it into a working platform with a constant strong magnetic field and turn on the magnetic field generator to magnetize for 60 minutes within a magnetic field strength of 20T. , and then put the ceramic powder into the powder cylinder of the powder feeder;

[0033] B. Turn on the pulsed magnetic field generator 5, set the pulsed magnetic field intensity to 20T, the duty cycle to 60%, the frequency to be 10Hz, and...

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Abstract

The invention discloses a method for magnetic-field-assisted laser engineered net shaping of an Al2O3-based eutectic ceramic cutting tool, and belongs to the field of tool manufacturing. Inert gas serves as power sending and protecting gas, and ceramic powder injected into a melting pond is melted through a high-energy laser beam. In the forming process, by using the magnetic anisotropy of ceramic grains and arraying the ceramic grains in an oriented mode through an added magnetic field, the texture structure of the Al2O3-based eutectic ceramic cutting tool is achieved, the anisotropy of the physical performance of the Al2O3-based eutectic ceramic cutting tool is generated, good heat conductivity and mechanical strength can be achieved, the cutting temperature of the ceramic cutting tool is reduced, and the service life of the tool is prolonged; no prefabricated template is needed when the Al2O3-based eutectic ceramic cutting tool is prepared through a magnetic-field-assisted laser engineered net shaping method, the situation that the texture non-uniformity is caused by uneven distribution of template grains does not exist, a formed piece is high in precision, and the micro-defects of pores, cracks and the like in a texture eutectic ceramic cutting tool are effectively prevented; a blank prefabricating and sintering process is not needed, the process is simplified, and production efficiency is improved.

Description

technical field [0001] The invention belongs to the field of cutting tool manufacturing, in particular to a magnetic field assisted laser near net shape Al 2 o 3 A method based on eutectic ceramic cutting tools. Background technique [0002] Eutectic ceramic tools are widely used in dry high-speed cutting with good red hardness, high temperature creep resistance and oxidation resistance. However, the inherent brittleness and poor thermal conductivity of eutectic ceramic tools limit the application of eutectic ceramic tools in cutting environments where the rigidity of the process system is not high and a large amount of cutting heat is generated. The low strength and toughness of the eutectic ceramic tool causes the tool to break and lose the cutting ability in advance. A large amount of cutting heat aggravates the wear of the main flank face of the tool and the crater wear of the rake face of the tool, which makes the tool reach the blunt standard in advance and shortens ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/10C04B35/626C04B35/64
CPCC04B35/10C04B35/626C04B35/64C04B2235/3244C04B2235/3826C04B2235/3873C04B2235/5436C04B2235/665
Inventor 吴东江闫帅沈忱牛方勇马广义
Owner DALIAN UNIV OF TECH
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