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Composite coating PCBN cutting tool and preparation method thereof

A cutting tool, composite technology, applied in the direction of coating, metal material coating process, vacuum evaporation plating, etc., can solve the problems of low service life, poor stability, loss of protection tools, etc., to improve toughness and internal, excellent Abrasion resistance and the effect of prolonging the service life

Active Publication Date: 2020-11-10
ZHUZHOU CEMENTED CARBIDE CUTTING TOOLS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, especially for the poor bonding strength between the PVD coating PCBN cutting tool coating and the substrate, and in the low rigidity cutting environment, the coating is prone to abnormal peeling, thus losing The role of tool protection, CVD-coated PCBN cutting tools have poor chipping resistance, and in the intermittent cutting environment, the tool is prone to chipping, resulting in technical problems such as low service life and poor stability. The coating has a composite coating PCBN cutting tool with good bonding strength with the substrate, high wear resistance and excellent chipping resistance, and also provides a composite coating with simple process, low equipment requirements and low production cost Preparation method of PCBN cutting tool

Method used

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  • Composite coating PCBN cutting tool and preparation method thereof
  • Composite coating PCBN cutting tool and preparation method thereof
  • Composite coating PCBN cutting tool and preparation method thereof

Examples

Experimental program
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Embodiment 1

[0036] A kind of composite coating PCBN cutting tool of the present invention, as figure 1 As shown, the tool includes a PCBN tool base 1 and a composite coating 2 coated on the surface of the PCBN tool base 1. The composite coating 2 includes a first transitional hard layer 3 sequentially arranged from the inside to the outside, and a low-pressure CVD method Prepared Al x Ti 1-x C y N 1-y Coating 4, second transition hard layer 5 and Ti prepared by cathodic arc PVD method 1-a-b Al a Me b N coating 6, Al x Ti 1-x C y N 1-y In coating 4, x=0.91, y=0, Ti 1-a-b Al a Me b In N coating 6, a=0.3, b=0.06, Me is the element Si, ie Ti 1-a-b Al a Si b N.

[0037] In this embodiment, the first transitional hard layer 3 is a TiN layer prepared by CVD, and the second transitional hard layer 5 is a TiN layer prepared by cathodic arc PVD.

[0038] In this embodiment, the total thickness of the composite coating is 11.1 μm, the thickness of the first transitional hard layer 3...

Embodiment 2

[0070] A kind of composite coating PCBN cutting tool of the present invention, as figure 1 As shown, the tool includes a PCBN tool base 1 and a composite coating 2 coated on the surface of the PCBN tool base 1. The composite coating 2 sequentially includes a first transitional hard layer 3 and a low-pressure CVD method from the inside to the outside. Al x Ti 1-x C y N 1-y Coating 4, second transition hard layer 5 and Ti prepared by magnetron sputtering PVD method 1-a-b Al a Me b N coating 6, Al x Ti 1-x C y N 1-y In coating 4, x=0.83, y=0.01, Ti 1-a-b Al a Me b In N coating 6, a=0.42, b=0.08, Me is the element Si, namely Ti 1-a-b Al a Si b N.

[0071] In this embodiment, the first transition hard layer 3 is a TiN layer prepared by CVD method, and the second transition hard layer 5 is a TiN layer prepared by magnetron sputtering PVD method.

[0072] In this embodiment, the total thickness of the composite coating is 13.1 μm, the thickness of the first transitio...

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Abstract

The invention discloses a composite coating PCBN cutting tool and a preparation method thereof. The cutting tool comprises a PCBN tool base body and a composite coating applied to the PCBN tool base body, the composite coating comprises a coating A located on the inner layer and a coating B located on the outer layer, wherein the coating A at least comprises an AlxTi1-xCyN1-y coating prepared through a low-pressure chemical vapor deposition method, and the coating B at least comprises a Ti1-a-bAlaMebN coating prepared by adopting a physical vapor deposition method; and the preparation method comprises the following steps of preparing the PCBN tool base body, depositing the AlxTi1xCyN1y coating by adopting a low-pressure CVD process, and depositing the Ti1-a-bAlaMebN coating by adopting a PVD process. The cutting tool has the advantages of being good in bonding strength between the coating and the base body, high in abrasion resistance, excellent in tipping resistance and the like, theservice life of the tool is long, and stability is good.

Description

technical field [0001] The invention belongs to the technical field of cutting tool preparation, and relates to a coated PCBN cutting tool and a preparation method thereof, in particular to a composite coated PCBN cutting tool and a preparation method thereof. Background technique [0002] PCBN (polycrystalline cubic boron nitride) is a polycrystalline material sintered by CBN micropowder and binder under high temperature and high pressure. PCBN is divided into two types according to the manufacturing composite method: the overall PCBN sintered block and the PCBN composite sheet sintered with cemented carbide. As a new tool material whose hardness is second only to natural diamond synthesized by artificial methods, PCBN is the most suitable tool material for high-speed cutting of iron-based metals. [0003] With the rapid development of high-speed cutting and dry cutting technology, PCBN cutting tools are used more and more, but they also encounter some processing difficult...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C16/36C23C14/06
CPCC23C16/36C23C14/0641
Inventor 彭凌洲陈响明温光华瞿峻
Owner ZHUZHOU CEMENTED CARBIDE CUTTING TOOLS CO LTD
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