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Method for evaluating coating stress of thermally induced phase change film regulation

A technology of thermally induced phase change and coating, which is applied in the evaluation of tool coating stress and the evaluation field of thermally induced phase change film regulating tool coating stress, which can solve the problems of lack of evaluation methods, improvement, and impact on tool quality, etc.

Pending Publication Date: 2021-09-14
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the existing tool coating stress lacks a corresponding evaluation method that affects the improvement of tool quality, and provides an evaluation method for thermally induced phase change film to regulate tool coating stress, and calculates the thermally induced phase change transition. Internal stress of layer coating system

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  • Method for evaluating coating stress of thermally induced phase change film regulation
  • Method for evaluating coating stress of thermally induced phase change film regulation
  • Method for evaluating coating stress of thermally induced phase change film regulation

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Embodiment Construction

[0024] The present invention will be further described below in conjunction with accompanying drawings and examples.

[0025] Such as Figure 1-3 shown.

[0026] An evaluation method for regulating the stress of a tool coating by a thermally induced phase change film, comprising the following steps:

[0027] (1) For M-phase VO 2 Crystal plane of unit cell and supercell of diamond crystal plane;

[0028] The relevant parameters of the supercellular process are determined by the following steps,

[0029] (1) Construct M-phase VO 2 Unit cell and diamond unit cell, and geometry optimization, M-phase VO 2 The unit cell parameters for unit cell optimization are unit cell lengths a, b, c, β and volume V, and the absolute value of the error between the optimization results and the experimentally measured values ​​does not exceed 2%; the unit cell parameters for diamond unit cell optimization are unit cell length a , b, c and volume V, the absolute value of the error between the ...

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Abstract

The invention relates to a method for evaluating the coating stress of a thermally induced phase change film regulation and control cutter, which is characterized by comprising the following steps: carrying out supercells of an M-phase VO2 unit cell crystal face and a diamond crystal face; constructing a thermally induced phase change layer and transition layer coating system; evaluating the stress of the thermally induced phase change transition layer coating system; according to the stress evaluation method, the tool coating system containing the thermally induced phase change layer is designed according to the stress characteristics, the thermally induced phase change transition layer capable of remarkably improving the stress of the coating can be designed, the film-substrate bonding performance of the tool coating is improved, the defect that the phase change process cannot be simulated through traditional finite element analysis is overcome, the method has the advantages of being good in operability, high in calculation efficiency, low in calculation cost and the like, and provides technical guidance for designing the cutter coating containing the middle transition layer.

Description

technical field [0001] The present invention relates to tool coating stress control technology, especially a tool coating stress assessment technology, specifically a thermal phase change film control tool coating stress assessment method, through the thermal phase change layer coating The stress simulation of the system is used to calculate the stress of the thermally induced phase change layer coating system. Background technique [0002] Coated tools have excellent performance in the processing of difficult-to-machine materials such as composite materials and hard and brittle materials widely used in automobiles, aviation, aerospace and other fields, but the stress existing in the preparation and actual processing of the tool coating will weaken the tool matrix The bonding strength between the film and the coating will cause the coating to crack or even fall off, reducing the service life of the coated tool. [0003] Using the thermal phase change layer as the intermedia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/23G06F30/17G06F119/08G06F119/14
CPCG06F30/23G06F30/17G06F2119/14G06F2119/08
Inventor 刘栋栋卢文壮杜星祝吴方强徐文慧孙玉利左敦稳
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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