A kind of preparation method of machining tool
A technology of mechanical processing and cutting tools, which is applied in the field of preparation of mechanical processing cutting tools, can solve problems such as difficult control of cutting tool performance, uneven porosity, complicated preparation process, etc., and achieve the goal of ensuring self-sharpening, uniform porosity, and improving cooling and lubrication capabilities Effect
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Embodiment 1
[0031] (1) The cemented carbide powder (NiCo alloy, alumina and boron powder) is fused and sintered, and then the particle size of the powder obtained by the crushing method is 25 μm, and the dry powder is sent to the plasma spraying equipment;
[0032] (2) Smooth the surface of the stencil steel base with a thickness of 3cm (roughness R a≤1µm), then use dry air to clean the surface of the stencil and apply 0.1mm magnesium oxide coating;
[0033] (3) Start the spraying system and the manipulator for plasma spraying. The process parameters are: the main gas is Ar and N 2 , the gas flow of argon is 80L / min, the gas flow of nitrogen is 20L / min; the working current is 415A, the working voltage is 140V; the powder feeding gas of the powder feeder is Ar, and the gas flow is 60L / min; the distance between the nozzle and the substrate is 10cm, the moving speed of the nozzle is 0.01m / s, and the required thickness of plasma spraying is completed at one time according to a certain direct...
Embodiment 2
[0037] (1) The ceramic powder (alumina, titanium oxide, silicon nitride and boron powder) is fused and sintered, and then the particle size of the powder obtained by the crushing method is 10 μm, and the dry powder is sent to the plasma spraying equipment;
[0038] (2) Smooth the surface of the copper-based stencil with a thickness of 3cm (R a ≤1µm), and then use dry air to clean the surface of the stencil;
[0039] (3) Start the spraying system and the manipulator for plasma spraying. The process parameters are: the main gas is Ar and N 2 , the gas flow of argon is 100L / min, the gas flow of nitrogen is 30L / min; the working current is 450A, the working voltage is 120V; the powder feeding gas of the powder feeder is Ar, and the gas flow is 45L / min; the distance between the nozzle and the substrate is 12cm, the moving speed of the nozzle is 0.005m / s, and the required thickness of plasma spraying is completed at one time according to a certain direction of the template. The obt...
Embodiment 3
[0043] (1) The cemented carbide powder (tungsten carbide and Co) is fused and sintered, and then the particle size of the powder obtained by the crushing method is 45 μm, and the dry powder is sent to the plasma spraying equipment;
[0044] (2) Smooth the surface of the copper-based stencil with a thickness of 1cm (R a ≤1µm), and then use dry air to clean the surface of the stencil;
[0045] (3) Start the spraying system and the manipulator for plasma spraying. The process parameters are: the main gas is Ar and N 2 , the gas flow of argon is 120L / min, the gas flow of nitrogen is 30L / min; the working current is 420A, the working voltage is 160V; the powder feeding gas of the powder feeder is Ar, and the gas flow is 45L / min; the distance between the nozzle and the substrate is 12cm, the moving speed of the nozzle is 0.02m / s, and the required thickness of plasma spraying is completed at one time according to a certain direction of the stencil;
[0046] (4) Naturally cool the st...
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