TiN-coat-coated mold

A coating and mold technology, applied in the field of ion coating molds, can solve the problems of reducing the mechanical properties of the coating, the coating quality is difficult to control, and the coating has many pores, so as to improve the internal fracture mechanical properties, easy to promote, and fracture toughness big effect

Inactive Publication Date: 2015-02-11
ACADEMY OF ARMORED FORCES ENG PLA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The thickness of the TiN coating prepared by CVD, PVD and other technologies is thin, which reduces the mechanical properties of the coating; while the thermal spraying reaction technology can be used to prepare a thicker TiN coating, but the coating contains more pores and is more brittle. , the coating quality is not easy to control

Method used

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Embodiment 1

[0025] The preparation of embodiment 1 coating

[0026] The preparation process of the coating is divided into four stages: preparation of TiN agglomerated powder, mold surface pretreatment, spraying parameter optimization, and spraying. The steps of the four stages are as follows:

[0027] (1) preparing TiN agglomerated powder;

[0028] (1-1) Atomize TiN powder with a powder particle size of 1-5 μm as a raw material;

[0029] (1-2) Mixing the atomized TiN powder and binder into the agglomeration equipment for agglomeration, drying the agglomerated powder, and granulating;

[0030] (1-3) passing the agglomerated powder through a -200 mesh to +400 mesh powder sieve to obtain a TiN agglomerated powder with a particle size of 40-80 micron micron spherical agglomerates.

[0031] The powder includes atomic fractions of Ti-72% and N-28%, and after agglomeration, spherical agglomerates with a particle diameter of 40-80 μm are formed.

[0032] (2) Mold surface pretreatment;

[003...

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Abstract

The invention discloses a mold of which the surface is coated with a TiN coat, wherein the surface is coated with a TiN coat, and the three-strong-peak phase of the coat is a TiN phase and also has partial TiO, TiO2 and Ti3O oxide phases. The coat has laminar distribution of dark-and-light phases, and the joint of the laminar structure inside and laminar structure is provided with a small amount of pores. The joint of the coat and base does not have crack or any other microdefect, is well combined. By using ultrasonic plasma to spray the TiN coat, the coat has higher hardness (up to 1210HV0.1), and the high hardness can enhance the wear resistance of the coat; the coat has higher fracture toughness which can enhance the interior fracture mechanical properties of the coat and prolong the fatigue life of the coat.

Description

technical field [0001] The invention relates to the field of material technology research, in particular to a plasma coating mold. Background technique [0002] TiN coating has low coefficient of friction, high hardness, and good corrosion resistance, and is widely used as decorative coating, wear-resistant coating, and corrosion-resistant coating. At present, many researchers have prepared TiN coatings by reactive thermal spraying, chemical vapor deposition (CVD), physical vapor deposition (PVD), arc plating, etc. Research. The thickness of the TiN coating prepared by CVD, PVD and other technologies is thin, which reduces the mechanical properties of the coating; while the thermal spraying reaction technology can be used to prepare a thicker TiN coating, but the coating contains more pores and is more brittle. , The coating quality is not easy to control. The direct spraying of TiN powder by plasma spraying technology can prepare a thicker coating in a short time. At the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/10C23C4/12F16C33/14C23C4/134
CPCC23C4/10C23C4/12F16C33/14
Inventor 王海斗邢志国崔华威金国
Owner ACADEMY OF ARMORED FORCES ENG PLA
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