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TiN coating mold with better wear resistance and fatigue performance

A coating and mold technology, which is applied in the field of TiN 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 achieve easy promotion, improve the fracture mechanical properties of the coating, The effect of high fracture toughness

Inactive Publication Date: 2015-01-07
ACADEMY OF ARMORED FORCES ENG PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • TiN coating mold with better wear resistance and fatigue performance
  • TiN coating mold with better wear resistance and fatigue performance
  • TiN coating mold with better wear resistance and fatigue performance

Examples

Experimental program
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Embodiment 1

[0027] Example 1 Preparation of coating

[0028] The coating preparation process is divided into four stages: preparation of Ti powder, mold surface pretreatment, cladding, and in-situ synthesis of TiN composite coating. The four stages are as follows:

[0029] (1) Using Ti powder as raw material, the particle size of Ti powder is 80-100μm.

[0030] Using Ti powder as the raw material, the powder is sieved, and the sieve is 125 mesh-300 meshes to obtain a relatively uniform Ti powder with better fluidity and a particle size of 80-100 microns.

[0031] (2) Pretreatment of mold surface.

[0032] (2-1) Grind the mold surface first to make the surface roughness of the mold reach Ra=0.8μm;

[0033] (2-2) Then clean the surface of the mold with alcohol or acetone to remove oil stains on the surface of the mold;

[0034] (3) Perform cladding.

[0035] (3-1) The cladding equipment adopts the PAW-1 plasma cladding platform, the cladding parameters are: current 80A, voltage 220V, powder feeding rate...

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Abstract

The invention discloses a TiN coating mold with better wear resistance and fatigue performance. The surface of the TiN coating mold is coated with a TiN coating, and the phase composition of the coating mainly comprises a TiN phase, an alpha-Fe phase, a Ti phase and an oxide-free phase; the coating is more compact and free of holes, TiN is dispersed and distributed in the coating, microdefects such as cracks in the coating and a substrate and the like are overcome, and the coating is in metallurgical bonding with the substrate. A thicker TiN coating can be prepared in short time through in-situ synthesis by a reaction plasma cladding technology, the deposition efficiency of powder is greatly improved, and the cost is saved; and the porosity in the coating is low, the coating quality is good, the coating and the substrate can form metallurgical bonding, and the coating performance is greatly improved.

Description

Technical field [0001] The invention relates to the field of material technology research, in particular to a TiN coating die. Background technique [0002] Reactive cladding technology is a new type of coating technology that "in-situ synthesizes" cermets and other coatings through chemical reactions between elements or compounds in the high-energy beam cladding process such as plasma or laser. The in-situ synthesis process is to form one or more high-strength, high-hardness reinforcing particles in-situ in the matrix through physical and chemical reactions between elements under certain conditions, thereby strengthening the matrix. Plasma cladding technology is to melt the coating material and the thin layer on the surface of the substrate through the plasma beam. It can obtain a surface functional coating that is metallurgically combined with the substrate on the surface of ordinary metal materials, thereby significantly improving the wear resistance, corrosion resistance, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10C22C14/00B32B15/04
CPCC22C14/00C23C24/103
Inventor 王海斗邢志国崔华威金国
Owner ACADEMY OF ARMORED FORCES ENG PLA
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