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A diamond-like composite film on the surface of a cutting tool

A diamond and composite film technology, which is applied in metal material coating process, vacuum evaporation plating, coating, etc., can solve the problems of reduced service life, single interface structure, and low bonding strength, so as to improve the bonding degree and reduce the surface Defects, Guaranteed Cohesion Effects

Active Publication Date: 2020-09-04
FUJIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the thickness of conventional diamond-like amorphous carbon-based films is relatively thin (generally less than 3 μm), resulting in their excellent friction reduction
The interface structure of traditional diamond-like amorphous carbon-based films is single, and the bonding strength of its single-layer (substrate directly deposited diamond-like amorphous carbon-based film) or double-layer (transition layer + diamond-like amorphous carbon-based film) structure is low (less than 10N), it is difficult to maintain a low wear rate under the action of high shear stress, and the single-layer and double-layer structures are difficult to effectively avoid the penetration of pores in the film caused by the intrinsic stress of the film, and the corrosion effect of the hydraulic oil on the substrate is still obvious, so that it The service life is greatly reduced

Method used

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  • A diamond-like composite film on the surface of a cutting tool
  • A diamond-like composite film on the surface of a cutting tool

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The metal bottom layer is a Cr layer, which is formed by magnetron sputtering and then laser cladding, and its thickness is 10nm. The process parameters of magnetron sputtering for the metal bottom layer are: substrate negative bias voltage 70V, chromium target current 2A, substrate rotation speed 2rpm, nitrogen flow rate 5sccm, C 2 h 2 The flow rate is 3.5 sccm; the process parameters of laser cladding for the metal bottom layer are power 1000W, argon gas flow rate 1200ml / min, scanning speed 2mm / s, laser head tilt angle 0 degrees, and defocus amount 10mm.

[0026] The thicknesses of the three layers of the transition layer are 50nm, 100nm, and 200nm in sequence from the inside to the outside.

[0027] The process parameters of the CrAl layer using magnetron sputtering are: substrate negative bias 70V, chromium target current 2A, substrate speed 2rpm, nitrogen flow 5sccm, aluminum target current 2A, C 2 h 2 Flow 3sccm;

[0028] The process parameters of the CrAlTi l...

Embodiment 2

[0035] The metal bottom layer is an Al layer, which is formed by magnetron sputtering and then laser cladding, and its thickness is 50nm. The process parameters of magnetron sputtering for the metal bottom layer are: substrate negative bias voltage 70V, aluminum target current 2A, substrate rotation speed 2rpm, nitrogen flow rate 5sccm, C 2 h 2 The flow rate is 3.5 sccm; the process parameters of laser cladding for the metal bottom layer are power 2500W, argon gas flow rate 2400ml / min, scanning speed 8mm / s, laser head tilt angle 30 degrees, and defocus amount 30mm.

[0036]The thicknesses of the three layers of the transition layer are 70nm, 200nm and 300nm in sequence from inside to outside.

[0037] The process parameters of the CrAl layer using magnetron sputtering are: substrate negative bias 100V, chromium target current 4A, substrate speed 8rpm, nitrogen flow 10sccm, aluminum target current 4A, C 2 h 2 Flow 7sccm;

[0038] The process parameters of the CrAlTi layer u...

Embodiment 3

[0045] The metal bottom layer is a Cr layer, which is formed by magnetron sputtering and then laser cladding, and its thickness is 25nm. The process parameters of magnetron sputtering for the metal bottom layer are: substrate negative bias voltage 70V, chromium target or aluminum target current 2A, substrate speed 2rpm, nitrogen flow rate 5sccm, C 2 h 2 The flow rate is 3.5 sccm; the process parameters of laser cladding for the metal bottom layer are power 1800W, argon gas flow rate 1700ml / min, scanning speed 5mm / s, laser head tilt angle 15 degrees, and defocus amount 20mm.

[0046] The thicknesses of the three layers of the transition layer are 60nm, 150nm and 250nm in sequence from inside to outside.

[0047] The process parameters of the CrAl layer using magnetron sputtering are: substrate negative bias voltage 80V, chromium target current 3A, substrate speed 5rpm, nitrogen flow rate 7sccm, aluminum target current 3A, C 2 h 2 Flow 5sccm;

[0048] The process parameters ...

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Abstract

The invention discloses a cutter surface diamond-like composite film, which comprises a metal base layer, a transition layer and a functional layer formed outwardly from the surface of a cutter in turn. The functional layer is a zirconium doped diamond-like layer, the transition layer is formed by stacking three kinds of film layers, and each film layer is formed by being subjected to first magnetron sputtering and then laser cladding from inside to outside in order. The composite film has the characteristics of low stress, high hardness, high wear resistance, high combination degree, long service life and the like.

Description

technical field [0001] The invention relates to the field of composite film on the surface of a tool, in particular to a diamond-like composite film on the surface of a tool. Background technique [0002] In the prior art, in order to improve the wear resistance and service life of the tool, methods of improving the material of the tool or changing the machining process of the tool are generally adopted. However, this method is costly and does not significantly improve the performance of the tool. In particular, the edge of the processing tool is very sharp. Generally, stainless steel is used and heat-treated, and the hardness reaches above 50HRC to ensure the wear resistance of the edge; but in order to improve the sharpness of the edge, the width of the edge of the tool needs to be as thin as ten microns. The hardness is not enough to greatly improve the wear resistance of the knife, and ordinary chemical heat treatment such as gas nitriding is difficult to treat such a th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C14/06C23C14/16C23C14/35C23C14/58
CPCC23C14/0605C23C14/0664C23C14/165C23C14/345C23C14/352C23C14/5813
Inventor 简明德王乾廷刘成武
Owner FUJIAN UNIV OF TECH