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A kind of preparation method of cemented carbide coated cutting tool and coated cutting tool

A cemented carbide and coating technology, applied in the direction of metal material coating technology, coating, metal processing equipment, etc., can solve the problem of difficult to achieve thick film coating, and achieve improved hardness, good wear resistance, and improved bonding. force effect

Active Publication Date: 2022-05-31
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0013] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a method for preparing a hard alloy coated tool and a coated tool, which overcomes the defect that the existing cathodic arc ion plating technology is difficult to achieve a thick film coating, and can Under the premise that the composition and structure of the coating have obvious influences, the ultra-thick film Al on cemented carbide can be realized. x Ti 1-x Internal stress control when N-coated, thus improving the cutting performance of tools when boring compacted graphite iron materials

Method used

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  • A kind of preparation method of cemented carbide coated cutting tool and coated cutting tool
  • A kind of preparation method of cemented carbide coated cutting tool and coated cutting tool
  • A kind of preparation method of cemented carbide coated cutting tool and coated cutting tool

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Embodiment 1

[0037] The present embodiment provides a method for preparing a cemented carbide coating tool, wherein deposition, stress regulation, and coating surface etching operations are cyclically used on the tool substrate until a cemented carbide coating with a desired thickness and internal stress level is obtained;

[0038] Wherein, the deposition step can use the prior art to carry out the coating of the AlxTi1-xN coating. The stress regulation step is to apply one or more thermal cycles to the tool that has deposited a coating of a certain thickness, so that the temperature is raised from the deposition temperature to the first set temperature and then lowered to the second set temperature, in order to make the AlxTi1-xN coating. The layer undergoes thermal cycling for atomic self-diffusion and stress relaxation, which is beneficial to eliminate defects generated during the coating process. The coating surface etching operation is to perform inert gas etching on the coated surfac...

Embodiment 2

[0055] This embodiment provides a coated cutting tool, which is prepared by the method described in the first embodiment.

[0056] like figure 2 As shown, a base body 1 is included, and the surface of the base body 1 has at least one layer of stress-controlled ultra-thick film cemented carbide coating.

[0057] Further, the upper surface of the base body 1 is provided with a base body surface etching layer 2 formed by etching treatment, and the upper surface of the base body surface etching layer 2 is provided with a first cemented carbide coating 3, and the first cemented carbide coating 3 is deposited, Stress regulation is formed; the upper surface of the first cemented carbide coating 3 is etched to form a first coating surface etching layer 4 . The base body 1 , the etching layer 2 on the surface of the base body, and the first cemented carbide coating 3 form the tool structure 9 of the first thermal cycle.

[0058] Similarly, a second cemented carbide coating 5, a seco...

Embodiment 3

[0064] In this example, WC-Co alloy with 6.0wt% Co is ground and sintered into SCMT09T308 cemented carbide inserts. The metallographic phase of these sintered inserts shows that the grain size is about 1.5 μm, and there is no cobalt at the cutting edge. enrichment phenomenon. The cutting edges of these blades were passivated to 30 μm arcs using the known wet sandblasting (alumina particles) method to obtain uncoated blades.

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Abstract

The invention discloses a method for preparing a cemented carbide coated tool and the coated tool. The technical scheme is: cyclically adopt deposition, stress control, and coating surface etching operations on the tool substrate until the desired thickness and internal stress level are obtained. The cemented carbide coating; wherein, the stress regulating step is to apply one or more thermal cycles to the tool for depositing the coating, so that the temperature is raised from the deposition temperature to the first set temperature and then dropped to the second set temperature. The invention overcomes the defect that the existing cathodic arc ion plating technology is difficult to realize the thick film coating, and can realize the internal stress control of the hard alloy coating, so as to improve the cutting performance of the cutting tool when boring the vermicular graphite cast iron material.

Description

technical field [0001] The invention relates to the technical field of coated cutting tools, in particular to a preparation method of a cemented carbide coated cutting tool and a coated cutting tool. Background technique [0002] AlxTi1-xN coated tools are ideal for material machining. However, compared with general gray iron materials, when AlxTi1-xN coated tools process vermicular iron materials with high creep rate, the life is reduced by 50-90%. important reason. Al x Ti 1-x The most widely used technologies in the field of N coating preparation are magnetron sputtering technology and cathodic arc ion plating technology. [0003] Magnetron sputtering has many limitations. For example, the power density of magnetron sputtering target is limited by thermal load, and positive ions are easy to burn out the sputtering target when the current is large. Therefore, the limited energy leads to low metal ionization rate. The beam contains large particles of ions, which genera...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C14/32C23C14/06C23C14/02C23C14/54B23B27/14B23B27/06
CPCC23C14/325C23C14/022C23C14/0641C23C14/54B23B27/06B23B27/14
Inventor 丁泽张松艾晓南祁小玲马伟陈秋杰
Owner SHANDONG UNIV
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