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TiN two-layer film cladding for cutting tool material surface and its preparing method

A double-layer film and cutting tool technology, which is applied in the coating process of metal materials, turning equipment, tool holder accessories, etc., to achieve good wear resistance, eliminate adverse effects, and relieve stress changes.

Inactive Publication Date: 2006-10-25
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to improve the bonding force between the TiN film and the matrix high-speed steel tool material, people have carried out extensive research, among which, adding a transition layer between the TiN film and the matrix high-speed steel tool material is the most important method. The transition layer mainly Including electroless Ni-P plating, brush plating Ni-W or Co-W, electrodeposition Ni, gas nitriding, ion nitriding and rare earth, etc. Although these transition layers can improve the contact between the TiN film and the base high-speed steel tool material Bonding force, but can only increase the scratch critical load to 50-60 Newtons

Method used

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  • TiN two-layer film cladding for cutting tool material surface and its preparing method
  • TiN two-layer film cladding for cutting tool material surface and its preparing method

Examples

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Effect test

Embodiment 1

[0029] AIP---01 type multi-arc ion coating machine is adopted, and a magnetic filter device is attached to the coating machine. Both the coating machine and the magnetic filtering device can be purchased from the market, and the magnetic filtering device is manufactured by the Institute of Low Energy Nuclear Physics of Beijing Normal University; The multi-arc ion coating machine is manufactured by Shenyang Yuankehang Company; the workpiece used is the finished high-speed steel tool purchased from Harbin Renji Measuring Tool Factory, and then cut into 12×12×6mm squares by wire.

[0030] (1) First, the workpiece is mechanically ground and polished and cleaned before plating, that is, the workpiece is placed in a 10% NaOH solution and cleaned with ultrasonic waves for 30 minutes to remove the oil on the surface of the workpiece; Remove rust and activate the surface at the same time; dehydrate and dry with alcohol;

[0031] (2) Put the dried workpiece into the AIP---01 multi-arc i...

Embodiment 2

[0038] Device and workpiece are with embodiment 1.

[0039] (1) First, the workpiece is mechanically ground and polished and cleaned before plating, that is, the workpiece is placed in a 10% NaOH solution and cleaned with ultrasonic waves for 30 minutes to remove the oil on the surface of the workpiece; Remove rust and activate the surface at the same time; dehydrate and dry with alcohol;

[0040] (2) Put the dried workpiece into the AIP---01 multi-arc ion coating machine, and put the polished side of the workpiece at 100mm from the outlet of the magnetic filter elbow, and let the plasma bombard the surface of the sample;

[0041] (3) Set the temperature range of the heating tube in the vacuum chamber to 240°C to 260°C, and then use mechanical pumps, Roots pumps, and diffusion pumps to evacuate step by step. When the pressure in the vacuum chamber drops to 6.5×10 -3 When Pa or above, turn on the power cooling water and coating power supply, adjust the cleaning bias to -800V, ...

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Abstract

The present invention discloses a TiN double-layer film coat on the surface of cutting tool material and its preparation method. Its preparation method includes the following steps: firstly, adopting magnetic filter to electroplate a layer of nano-grade particle TiN film on the surface of cutting tool material, then adopting general multiple-arc electroplating process to electroplate a layer of micrometer-grade granule TiN film, in which nano-grade TiN particle size is 40-100 nm, film thickness if 50-300 nm, micrometer-grade TiN granule size is 0.5-1 micrometer, total thickness of double-layer film is 2-5 micrometers.

Description

technical field [0001] The invention relates to the technical field of superhard materials, in particular to a TiN double-layer film coating on the surface of a cutting tool material and a preparation method thereof. Background technique [0002] In mechanical manufacturing, cutting tools are used to cut metal into mechanical parts of various shapes, and most of these cutting tools are made of high-speed steel materials. Due to the strong friction between the surface of the cutting tool and the metal chips and the strong deformation of the metal, a lot of heat is generated, so the working temperature of the cutting tool is very high, which reduces the hardness and service life of the cutting tool, and at the same time reduces the machining accuracy . [0003] Titanium nitride (TiN) thin film material has high hardness and small friction coefficient, and is widely used in the surface protection layer of various parts because of its good wear resistan...

Claims

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Application Information

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IPC IPC(8): B23B27/14C23C14/02C23C14/06C23C14/34C23C14/54C23C30/00
Inventor 刘正义史新伟邱万奇曾德长李春明
Owner SOUTH CHINA UNIV OF TECH
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