TiAlN ultra-hard composite coating provided with hardness gradient layer for supporting and preparation method of TiAlN ultra-hard composite coating
A technology of hardness gradient and hard coating, applied in coating, superimposed layer plating, metal material coating process, etc., can solve the problems of insufficient bearing capacity, unreliable bonding force of hard film, poor temperature resistance, etc. , to achieve the effect of improving life expectancy
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Embodiment 1
[0033] like Figure 4As shown, a TiAlN composite superhard coating supported by a hardness gradient layer, the superhard coating is a three-layer structure consisting of a base material, an expansion layer and a deposition layer from bottom to top; the base material is 300M high-strength steel; the expansion layer is a plasma nitrocarburizing layer; the deposition layer is a nitrogen-aluminum-titanium coating 1.
[0034] The hardness of the plasma nitrocarburizing layer gradually increases from bottom to top.
[0035] The thickness of the plasma nitrocarburizing layer is 100 μm; the thickness of the titanium nitride aluminum coating is 3 μm.
[0036] A method for preparing a TiAlN composite superhard coating supported by a hardness gradient layer, the steps are as follows:
[0037] 1) The plasma nitrocarburizing layer was prepared on the upper surface of the 300M high-strength steel through the plasma nitrocarburizing technology enhanced by the hollow cathode effect and fiel...
Embodiment 2
[0045] like Figure 4 As shown, a TiAlN composite superhard coating supported by a hardness gradient layer, the superhard coating is a three-layer structure consisting of a base material, an expansion layer and a deposition layer from bottom to top; the base material is Nickel-based alloy; the expansion layer is a plasma nitrocarburizing layer; the deposition layer is a nitrogen-aluminum-titanium coating.
[0046] The hardness of the plasma nitrocarburizing layer gradually increases from bottom to top.
[0047] The thickness of the plasma nitrocarburizing layer is 200 μm; the thickness of the aluminum nitride titanium coating is 6 μm.
[0048] A method for preparing a TiAlN composite superhard coating supported by a hardness gradient layer, the steps are as follows:
[0049] 1) The plasma nitrocarburizing layer is prepared on the surface of the base material through the plasma nitrocarburizing technology enhanced by the hollow cathode effect and field discharge;
[0050] 2)...
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