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High current pulsed electron beam surface treatment method for hard alloy coating tool

A pulsed electron beam, cemented carbide technology, applied in heat treatment furnaces, heat treatment equipment, manufacturing tools, etc., can solve the problems of poor coating compactness, large residual stress, and a large number of surface droplets, to improve hardness and wear resistance. performance, meet the requirements of high-speed cutting, and improve the effect of bonding state

Active Publication Date: 2014-05-14
凤城市合鑫机械制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the hard coating also has congenital defects such as large residual stress with the substrate, a large number of droplets on the surface, and poor coating compactness, which affect the microstructure and mechanical properties of the coating, so that the hard coating The application of layered carbide cutting tools is also subject to certain restrictions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A high-current pulsed electron beam surface treatment method for a carbide-coated cutter, comprising the following process steps:

[0017] 1. Choose a TiN single-layer coated carbide tool with a coating thickness of 4 μm. Clean the surface of the tool with acetone to remove oil stains and set aside;

[0018] 2. Place the TiN single-layer coated cemented carbide tool treated in step (1) in the high-current pulsed electron beam generating device, and make the tool surface to be treated in the center of the electron irradiation spot. The working room of the device Vacuum to 10 -3 Above Pa;

[0019] 3. The blade surface of the TiN single-layer coated hard alloy tool is treated with a high-current pulsed electron beam, the acceleration voltage is 15kV, the acceleration current is 200A, the pulse duration is 10μs, the pulse frequency is 10HZ, and the number of bombardments is 50 times.

[0020] 4. After processing, take out the tool.

Embodiment 2

[0022] A high-current pulsed electron beam surface treatment method for a carbide-coated cutter, comprising the following process steps:

[0023] 1. Select a TiAlN-coated cemented carbide tool with a strong and tough substrate with a TiAlN coating and ultra-fine particles. The grain size of the coating is about 50 nm, and the coating thickness is about 4 μm.

[0024] Clean the surface of the TiAlN coated carbide tool with acetone to remove oil and other impurities;

[0025] 2. Place the coated carbide tool in the high-current pulsed electron beam device to ensure that the tool surface to be processed is in the center of the electron beam irradiation spot, and the working room of the device is vacuumed to 5×10 -3 Pa;

[0026] 3. The process parameters of high-current pulsed electron beam treatment are: acceleration voltage 13kV; pulse current 180A; pulse duration 5μs, pulse frequency 0.1HZ. The bombardment position is selected from the rake face of the tool surface to the too...

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Abstract

The invention discloses a high current pulsed electron beam surface treatment method for a hard alloy coating tool. The method comprises the following process steps: cleaning the surface of the hard alloy coating tool to acetone to remove impurities such as oil dirt from the surface of the hard alloy coating tool; placing the treated hard alloy coating tool into a pulsed electron beam emission device to ensure that the tool surface to be treated is in the center of an electron beam irradiation spot, and vacuumizing a working chamber of the device to over 10<-3>Pa; performing irradiation bombardment on the coating tool through a pulsed electron beam with accelerating voltage of 10-15kV and pulse current of 100-200A, wherein the pulse duration is -10mu s, the pulse frequency is 0.1-10Hz, and the number of times of pulse is 1-50; after the treatment is finished, taking the tool out. By performing surface treatment on coatings such as single-layer TiN and TiAlN of a hard alloy matrix through the high current pulsed electron beam, the organization of the coating can be improved, and the hardness and wear resistance of the coating are improved.

Description

technical field [0001] The invention belongs to the technical field of material surface treatment, and relates to a high-current pulse electron beam surface treatment method for hard alloy coated tools, in particular to a method for improving the surface performance and cutting performance of hard alloy coated tools by using high-current pulse electron beam surface treatment. performance method. Background technique [0002] With the rapid development of the manufacturing industry, the processing technology requirements of high speed, small depth of cut and large feed have increased the demand for coated carbide tools. Hard-coated tools such as TiN and TiAlN have excellent hardness, wear resistance and high-temperature oxidation resistance, and have become a new type of tool that is currently widely used. However, the hard coating also has congenital defects such as large residual stress with the substrate, a large number of droplets on the surface, and poor coating compact...

Claims

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Application Information

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IPC IPC(8): C21D9/18C21D1/09
Inventor 娄长胜芦馨高景龙金光王强
Owner 凤城市合鑫机械制造有限公司
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