Method for preparing TiCN coating on surface of screw tap

A technology for coating and taps, which is applied in the field of preparing TiCN coatings on the surface of taps, which can solve the problems of tapping tap thread speed, tap wear, unsuitable for tap surface coating, and large cutting thickness.

Active Publication Date: 2019-01-11
XIAN HAOYUAN COATING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1. Poor chip removal causes chip blockage and breakage;
[0004] 2. Tooth collapse caused by too much cutting thickness of each tooth of the tap;
[0005] 3. The tap is severely worn due to excessive speed, improper selection of cutting fluid, and excessive hardness of the workpiece mat

Method used

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  • Method for preparing TiCN coating on surface of screw tap

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Embodiment Construction

[0039] This embodiment provides a method for preparing a TiCN coating on the surface of a tap. It should be noted that the TiCN coating prepared on the surface of the tap of the present invention can be prepared at any high speed. The cutting tool made of steel material is not limited to this example.

[0040] The method for preparing TiCN coating on the surface of the tap provided in this embodiment, its specific preparation process is:

[0041] (1) Use taps (material: W18Cr4V) with a hardness of HRC=60 after quenching at 1170°C and tempering at 550°C as samples, and first perform pretreatment, that is, after surface degreasing and polishing, immerse in acetone for ultrasonic cleaning, alcohol Dehydrate and set aside.

[0042] (2) Put the pretreated sample into the arc ion coating equipment. Such as figure 1 As shown, the arc ion coating equipment at least includes an external power supply bias 1, a turntable 2, a vacuum chamber 3, a turntable rod 4, Ti targets (5, 6, 7), ...

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Abstract

The invention discloses a method for preparing a TiCN coating on a surface of a screw tap. The method comprises the following steps that after the screw tap made from high-speed steel is treated in advance, the screw tap is placed on a rotating frame rod of electric arc ion coating equipment, a Ti target is used as a Ti element source for preparing the TiCN coating, and a sputtering rate of the Titarget is controlled through a current of an arc power supply; high-purity Ar is adopted as a main ionization gas, high-purity N2 and high-purity CH2 are adopted as reaction gases, the N2 gas and theCH2 gas are enabled to be ionized and combined with the Ti element, and the TiCN coating is formed on the surface of the screw tap; and the prepared TiCN coating is of a multi-layer structure, namelya Ti/TiN/TiCN/TiN/TiCN structure. The total thickness of the TiCN is 2 microns, the TiCN coating comprises the following atomic components of 52at.% of Ti, 28at.% of C and 20at.% of N; coating hardness is HV3000, under the condition of room temperature dry friction and GCr15 friction pairs, a friction coefficient of the coating is 0.15 through detection by a pin-on-disc test, the coating has excellent antifriction performance, and the method is suitable for being applied to tapping machining of refractory materials.

Description

technical field [0001] The invention belongs to the technical field of application of coatings in cutting tools, relates to the preparation of coatings on the surface of cutting tools, and further relates to a method for preparing TiCN coatings on the surface of taps. Background technique [0002] Tap is a tool for processing various small and medium-sized internal threads. It has a simple structure and is easy to use, and is widely used in production. According to the way of use, it can be divided into hand taps and machine taps. Generally, high-speed steel or cemented carbide molar taps with high manufacturing precision are called machine taps, and carbon tool steel or alloy tool steel hobbing (or cutting) Tooth) taps are called hand taps. In fact, the structure and working principle of the two are basically the same. Generally, a tap consists of a working part and a shank. The working part is divided into a cutting part and a calibration part. The former is ground with ...

Claims

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Application Information

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IPC IPC(8): C23C14/32C23C14/06C23C14/02
CPCC23C14/0021C23C14/025C23C14/0641C23C14/0664C23C14/325C23C28/347
Inventor 马胜利
Owner XIAN HAOYUAN COATING TECH
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