Ta-c composite coating

Abstract

The utility model provides a kind of Ta-C composite coating and preparation method, the composite coating is formed on high-speed steel matrix, stainless steel matrix or cast iron matrix, the composite coating includes transition layer and wear-resistant layer which are sequentially stacked;The transition layer includes Me layer, MeN layer, Me(W)N layer and MeWN layer;The wear-resistant layer includes WC layer, WC / Ta-C composite layer and Ta-C layer.The Ta-C composite coating of the utility model uses composite gradient transition layer technology, the structure of composite coating is optimized as a whole, to improve the effect of the binding force between matrix and composite coating and the interlayer binding force of composite coating, and enhance the hardness, shear strength and wear resistance of composite coating, and surface still maintain low friction coefficient, by introducing how coating of this kind of novel structure to improve the effect of wear resistance and life of component.

Claims

1. A Ta-C composite coating, characterized in that, The composite coating is formed on a high-speed steel substrate, a stainless steel substrate, or a cast iron substrate, and the composite coating includes a transition layer and a wear-resistant layer stacked sequentially. The transition layer includes a Me layer, a MeN layer, a Me(W)N layer, and a MeWN layer; The wear-resistant layer includes a WC layer, a WC / Ta-C composite layer, and a Ta-C layer.

2. The Ta-C composite coating according to claim 1, characterized in that, In the thickness direction of the composite coating, the W content of the Me(W)N layer gradually increases.

3. The Ta-C composite coating according to claim 1, characterized in that, In the thickness direction of the composite coating, the W content of the Me(W)N layer gradually increases from 0% to (70±5)%; and / or The W content of the MeWN layer is (70±5)%.

4. The Ta-C composite coating according to claim 1, characterized in that, The thickness of the transition layer is 35-45% of the thickness of the composite coating; and / or The thickness of the Me layer is 5-10% of the thickness of the composite coating; and / or The thickness of the MeN layer is 5-15% of the thickness of the composite coating; and / or The thickness of the Me(W)N layer is 15-25% of the thickness of the composite coating; and / or The thickness of the MeWN layer is 5 to 15% of the thickness of the composite coating.

5. The Ta-C composite coating according to claim 1, characterized in that, In the thickness direction of the composite coating, the ratio of Ta-C to WC content in the WC / Ta-C composite layer gradually increases.

6. The Ta-C composite coating according to claim 1, characterized in that, In the thickness direction of the composite coating, the ratio of Ta-C to WC content in the WC / Ta-C composite layer increases from 1 / 9 to 9.

7. The Ta-C composite coating according to claim 1, characterized in that, The thickness of the wear-resistant layer is 55-65% of the thickness of the composite coating; and / or The thickness of the WC layer is 10-15% of the thickness of the composite coating; and / or The thickness of the WC / Ta-C composite layer is 15-25% of the thickness of the composite coating; and / or The thickness of the Ta-C layer is 20-30% of the thickness of the composite coating; and / or SP in the WC / Ta-C composite layer or the Ta-C phase in the Ta-C layer 3 The carbon content ranges from 60% to 80%.

8. The Ta-C composite coating according to claim 1, characterized in that, The thickness of the composite coating is 3 to 4 μm.

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