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Self-hardening TiAlN/CrAlN multi-layer coated cutter and preparation method thereof

A multi-layer coating, self-hardening technology, applied in the direction of tools for lathes, turning equipment, layered products, etc., can solve the problem of thermal stability of the coating is not involved, and achieve excellent thermal stability, high temperature oxidation resistance The effect of age hardening and improvement of bond strength

Active Publication Date: 2014-12-03
ZHUZHOU CEMENTED CARBIDE CUTTING TOOLS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, some patents and articles have reported on the research on CrAlN / TiAlN multilayer coatings, but most of them focus on the mechanical properties and high temperature oxidation resistance of the coatings, and basically do not involve the thermal stability of the coatings, especially on the How to control the structure of CrAlN / TiAlN multilayer coating to achieve the age hardening effect of the coating at high temperature has not been reported

Method used

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  • Self-hardening TiAlN/CrAlN multi-layer coated cutter and preparation method thereof
  • Self-hardening TiAlN/CrAlN multi-layer coated cutter and preparation method thereof
  • Self-hardening TiAlN/CrAlN multi-layer coated cutter and preparation method thereof

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Embodiment 1

[0040] A self-hardening TiAlN / CrAlN multilayer coating tool of the present invention, such as figure 1 As shown, it includes a tool base 1 and a multi-layer coating deposited on the tool base 1, the multi-layer coating contains Ti 1-z al z N transition layer 2 and multi-cycle coating. Ti 1-z al z The N transition layer 2 is deposited on the surface of the tool substrate 1, and the multi-period coating is deposited on the Ti 1-z al z N transition layer 2. The multi-period coating is an alternate deposition of Ti 1-x al x N layer 3 and Cr 1-y al y The multilayer structure of N-layer 4, showing the 1-x al x N layer 3 to Cr 1-y al y N layer 4" is a multi-periodic change trend of a period. Ti 1-x al x The crystal structure of the N layer 3 is a face-centered cubic structure, Cr 1-y al y The crystal structure of the N layer 4 is a face-centered cubic structure, Ti 1-x al x N layer 3 and Cr 1-y al y N layer 4 co-epitaxy grown into a superlattice structure, Ti 1-...

Embodiment 2

[0044] A self-hardening TiAlN / CrAlN multilayer coating tool of the present invention, such as figure 1 As shown, it includes a tool base 1 and a multi-layer coating deposited on the tool base 1, the multi-layer coating contains Ti 1-z al z N transition layer 2 and multi-cycle coating. Ti 1-z al z The N transition layer 2 is deposited on the surface of the tool substrate 1, and the multi-period coating is deposited on the Ti 1-z al z N transition layer 2. Ti 1-z al z The N transition layer 2 is specifically Ti 0.50 al 0.50 The N transition layer has a thickness of 500nm. The multi-period coating is based on "Ti 1-x al x N layer 3 and Cr 1-y al y N layer 4" is the modulation cycle, specifically 200 cycles, where Ti 1-x al x N layer 3 is specifically Ti 0.50 al 0.50 N layer, thickness 10nm, Cr 1-y aly N layer 4 is specifically Cr 0.33 al 0.67 N layer with a thickness of 6nm. In this multi-layer coated tool, the total thickness of the multi-layer coating is 3...

Embodiment 3

[0054] A self-hardening TiAlN / CrAlN multilayer coating tool of the present invention, such as figure 2 As shown, it includes a tool base 1 and a multi-layer coating deposited on the tool base 1, the multi-layer coating includes a multi-period coating. The multi-cycle coating is deposited on the tool substrate 1, based on the "Ti 1-x al x N layer 3 and Cr 1-y al y N layer 4" is the modulation cycle, specifically 200 cycles, where Ti 1-x al x N layer 3 is specifically Ti 0.50 al 0.50 N layer, thickness 10nm, Cr 1-y al y N layer 4 is specifically Cr 0.33 al 0.67 N layer with a thickness of 6nm. In this multilayer coated tool, the total thickness of the multilayer coating is 3.2 μm, and the total thickness of the multi-period coating is 3.2 μm.

[0055] In this embodiment, the multi-layer coating is based on the surface of the tool substrate to present "Ti 1-x al x N layer 3 to Cr 1-y al y Periodic variation trend of N-layer 4", Ti 1-x al x The crystal structure...

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Abstract

The invention discloses a self-hardening TiAlN / CrAlN multi-layer coated cutter and a preparation method of the self-hardening TiAlN / CrAlN multi-layer coated cutter; the multi-layer coated cutter comprises a cutter base body and multiple-layer coatings deposited on the cutter base body; the multiple-layer coatings comprise multi-period coatings, on which a Til-xAlxN layer and a Crl-yAlyN layer are alternatively deposited, wherein x is more than or equal to 0.35 and less than or equal to 0.67; y is more than or equal to 0.50 and less than or equal to 0.70; and the thickness ratio of the Til-xAlxN layer to the Crl-yAlyN layer is more than or equal to 1.5. The preparation method disclosed by the invention comprises the following steps: pre-processing the cutter base body, selectively depositing a transition layer, alternatively depositing the multi-period coatings including the Til-xAlxN layer and the Crl-yAlyN layer, and then, obtaining the multi-layer coated cutter. The multi-layer coated cutter disclosed by the invention has excellent heat stability and high-temperature oxidation resistance and can be hardened in an ageing manner; and the preparation method is simple in process, conventional in equipment and low in production cost.

Description

technical field [0001] The invention relates to a cutting tool and its preparation, in particular to a cutting tool with a composite coating and its preparation method. Background technique [0002] The metastable phase MeAlN coating formed by replacing part of Me in the cubic structure (c) transition metal nitride MeN (Me=Ti, Zr, Cr, etc.) with Al has excellent properties such as high hardness, high melting point and good oxidation resistance. Performance has become a research hotspot in tool coatings. The crystal structure and mechanical properties of MeAlN coating depend to a large extent on the Al content in the coating. When the Al content exceeds the solid solubility of MeN, the cubic structure of MeAlN transforms into hexagonal phase (w) AlN to make its mechanical properties and thermal performance degrades significantly. In addition, when the coating is kept in a cubic structure, the mechanical properties and high-temperature oxidation resistance of the coating inc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B33/00B32B9/04B23B27/14
Inventor 陈利吴明晶李佳
Owner ZHUZHOU CEMENTED CARBIDE CUTTING TOOLS CO LTD
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