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Surface modification method of ceramic cutting tool

A technology of ceramic cutting tools and surface modification, applied in the field of surface modification of ceramic cutting tools and MEVVA ion implantation surface modification method of ceramic cutting tools, can solve the problems of poor wear behavior, difficulty in applying negative bias, and high wear coefficient, To achieve the effect of reducing friction and wear and friction coefficient, reducing micro-crack propagation, and improving cutting ability

Inactive Publication Date: 2015-01-14
WUXI CHENGBO SCI & TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still problems that the bonding force between the film and the substrate is not ideal and the deposition rate is too low.
[0003] Ceramics have the advantages of high hardness and high-temperature strength, creep resistance, high oxidation resistance and high-temperature chemical stability, but their chemical bonds are limited, and micro-cracks and defects are prone to appear during the preparation process, making the surface sensitive to fracture, showing low toughness, Disadvantages such as tensile strength, low flexural strength, poor material reliability and reproducibility, high wear coefficient, poor wear behavior, insufficient thermal shock resistance
At the same time, for ceramic tools, due to the non-conductivity of most ceramic tools themselves, it is difficult to apply a negative bias as the deposition substrate of the PVD process. not feasible
[0004] The purpose of the present invention is to provide a surface modification method capable of improving the low toughness and poor wear resistance of ceramic cutting tools

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A method for surface modification of ceramic cutters, the method uses MEVVA implantation technology to carry out surface modification on cleaned cutters (the cutters are crystalline alumina and hot-pressed silicon nitride ceramic cutters); the implanted ions are 0.6×10 17 ions / cm 2 Titanium, 5×10 17 ions / cm 2 Zirconium, 3×10 17 ions / cm 2 Chrome, 9×10 17 ions / cm 2 of molybdenum and / or 8 x 10 17 ions / cm 2 The tungsten; the accelerating voltage of MEVVA is 70kV; the average ion current intensity is 2mA; the base vacuum of the MEVVA is 8×10 -4 Pa;

[0026] After MEVVA ion implantation, the ion implantation depth of the ceramic tool is 300nm.

Embodiment 2

[0028] A method for surface modification of ceramic cutters, the method uses MEVVA implantation technology to carry out surface modification on cleaned cutters (the cutters are crystalline alumina and hot-pressed silicon nitride ceramic cutters); the implanted ions are 0.3×10 17 ions / cm 2 Titanium, 2×10 17 ions / cm 2 Zirconium, 7×10 17 ions / cm 2 The chromium; the accelerating voltage of MEVVA is 30kV; the average ion current intensity is 4mA; the base vacuum of the MEVVA is 3×10 -4 Pa;

[0029] After MEVVA ion implantation, the ion implantation depth of the ceramic tool is 100nm.

Embodiment 3

[0031] A method for surface modification of ceramic cutters, the method uses MEVVA implantation technology to carry out surface modification on cleaned cutters (the cutters are crystalline alumina and hot-pressed silicon nitride ceramic cutters); the implanted ions are 0.1×10 17 ions / cm 2 Titanium, 4×10 17 ions / cm 2 Zirconium, 8×10 17 ions / cm 2 Chrome, 4×10 17ions / cm 2 The molybdenum; the accelerating voltage of MEVVA is 50kV; the average ion current intensity is 3mA; the base vacuum of the MEVVA is 4×10 -4 Pa;

[0032] After MEVVA ion implantation, the ion implantation depth of the ceramic tool is 50nm.

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Abstract

The invention relates to a surface modification method of a ceramic cutting tool. According to the method, an MEVVA implantation technique is adopted to carry out surface modification on a cleaned cutting tool, wherein implanted ions are any three, four or five kinds of titanium, zirconium, chromium, molybdenum and tungsten ions. After ion implanted modification, the mechanical properties of the ceramic cutting tool are remarkably improved, and the life of the ceramic cutting tool is prolonged, so that the ceramic cutting tool is applicable to the machining of high-hardness and high-strength materials.

Description

technical field [0001] The invention relates to a method for surface modification of ceramic cutters, in particular to a MEVVA ion implantation surface modification method for ceramic cutters, and belongs to the technical field of ceramic cutter preparation and mechanical processing. Background technique [0002] At present, the commonly used surface modification processes of metal cutting tools include physical vapor deposition (PVD) and chemical vapor deposition (CVD). Among them, the CVD method is often used to deposit films on high-temperature-resistant tool substrates (such as cemented carbide tools), because the CVD process needs to be carried out at high temperatures (750-1000 ° C), and only the use of special precursors can reduce the reaction temperature, so energy consumption High, serious environmental pollution. Compared with the CVD method, the PVD method is environmentally friendly and suitable for depositing ternary and multivariate metastable films. The dep...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B41/80
Inventor 李飞
Owner WUXI CHENGBO SCI & TECH DEV
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