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Machining method for improving performance of AlCrN coated cutter through micro-particle shot blasting aftertreatment

A processing method and shot peening technology, applied in the direction of metal material coating process, coating, ion implantation plating, etc., can solve the problems of reducing the overall performance of the coating, increasing the friction resistance, increasing the surface roughness of the coating, etc. Achieving the effect of low coating surface roughness, reduced number of droplet particles, and reduced coating surface roughness

Active Publication Date: 2021-04-27
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Particles of different sizes on the coating surface increase the roughness of the coating surface and reduce the overall performance of the coating, which in turn leads to an increase in the frictional resistance when the tool surface interacts with the workpiece

Method used

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  • Machining method for improving performance of AlCrN coated cutter through micro-particle shot blasting aftertreatment
  • Machining method for improving performance of AlCrN coated cutter through micro-particle shot blasting aftertreatment
  • Machining method for improving performance of AlCrN coated cutter through micro-particle shot blasting aftertreatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] The test uses M42 high-speed steel sample pieces and M42 high-speed steel straight shank end mills with a diameter of 10mm. Two symmetrically distributed AlCr (atomic ratio Al:Cr=70:30, purity 99.5%) alloy targets were used in the test. Before coating, use high-energy Ar + The surface of the substrate is bombarded, that is, the surface of the substrate is etched and cleaned, the current is 90A, and the time is 30min; when coating, the temperature is 450°C, N 2 Pressure 4.0*10 -2 mbar, the AlCr alloy target current is 130A, and the deposition time is 2 hours.

[0049] The prepared AlCrN coating was tested.

Embodiment 2

[0051] The method of preparing the AlCrN coating is the same as the first embodiment.

[0052] Micro particle peening steps:

[0053]The first step is to select microparticle pellets. The pellets are high-speed steel shot materials with a diameter of 80 μm to 150 μm. The pellets present a good spherical shape, and the hardness of the microparticles is as high as HRC 68; in the second step, the diameter of the microparticle shot peening nozzle is 5mm, the distance between the nozzle distance and the coating sample is set to 5cm~8cm; in the third step, the shot peening pressure is set to 0.55MPa, and the speed of microparticle peening is set to 150m / s; the peening time of microparticle peening is set for 30s.

[0054] The AlCrN coating after microparticle shot peening was tested.

[0055] Other implementations are the same as in Embodiment 1.

[0056] The untreated AlCrN coating and the AlCrN coating treated with particle shot peening were tested, and the test results are sho...

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Abstract

The invention discloses a machining method for improving performance of an AlCrN coating cutter through micro-particle shot blasting aftertreatment. The machining method comprises the steps: preparing an AlCrN functional coating; depositing the AlCrN functional coating on a treated base material; carrying out micro-particle shot blasting treatment; and carrying out micro-particle shot blasting post-treatment on the base material on which the AlCrN functional coating is prepared; By means of the method, the surface roughness of the coating can be remarkably reduced, the low friction coefficient and the low surface residual compressive stress are obtained, the residual compressive stress of a base body is improved, the frictional wear resistance and the cutting performance of the coating are improved, and the method has great application prospects in the fields of cutter and surface protection.

Description

technical field [0001] The invention relates to the technical field of cutting tool processing technology, in particular to a processing method for improving the performance of AlCrN coated cutting tools after particle shot peening. Background technique [0002] In the machinery manufacturing industry, although there are many different process forming methods, more than 90% of mechanical parts are still manufactured by cutting process. With the development of science and technology, the machining industry has put forward higher requirements for cutting tools. The manufacturing concept of high efficiency, composite and environmental protection has been widely mentioned, and hard coatings have been widely used in cutting tools. According to statistics, more than 80% of knives use tool coating. Coated tools can significantly improve tool life and cutting efficiency compared to uncoated tools. [0003] Multi-arc ion plating technology is the mainstream technology for preparing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/06C23C14/32C23C14/58C22C38/02C22C38/04C22C38/22C22C38/24
CPCC23C14/0641C23C14/325C23C14/5886C23C14/0021C22C38/02C22C38/04C22C38/22C22C38/24
Inventor 蔡飞张世宏
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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