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Method for preparing titanium nitride/chromium nitride coating based on microwave technology

A technology of titanium nitride and chromium nitride, which is applied in the field of preparation of titanium chromium (TiN/CrN) coatings, can solve problems such as easy peeling of coatings, restrictions on parts shape and size, and large investment in equipment, achieving fast heating speed, strong binding effect

Inactive Publication Date: 2014-04-23
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, TiN / CrN coatings are mainly manufactured by physical vapor deposition (PVD), chemical vapor deposition (CVD) and other technologies, among which chemical vapor deposition is gradually replaced by physical vapor deposition due to thermal stress caused by high temperature and environmental hazards caused by its waste. ;Physical vapor deposition is low temperature and environmentally friendly, but the investment in equipment is large, the shape and size of parts are limited, the formed coating is thin and the coating is easy to peel off

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A uniform and dense paste containing 30% titanium, 30% chromium and 40% epoxy resin binder is evenly coated on the surface of the workpiece, and then the coated workpiece is placed in a microwave device, under the protection of nitrogen for a certain amount of time. Place in microwave with power (10KW) for 10 minutes; after the workpiece is cooled, remove the unreacted paste on the surface and polish to form a titanium nitride / chromium nitride coating with a thickness of about 2 μm on the surface of the workpiece.

Embodiment 2

[0021] A uniform and dense paste containing 40% titanium, 40% chromium and 20% epoxy resin binder is evenly coated on the surface of the workpiece, and then the coated workpiece is placed in a microwave device, under nitrogen protection Power (20KW) microwave for 30 minutes; after the workpiece is cooled, the unreacted paste on the surface is removed and polished to form a titanium nitride / chromium nitride coating with a thickness of about 5 μm on the workpiece surface.

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Abstract

The invention discloses a method for preparing a titanium nitride / chromium nitride coating based on the microwave technology. The method comprises the following steps: (1) coating the surface of a workpiece with a layer of uniform and dense titanium-chromium material layer, wherein the titanium-chromium material is formed by mixing titanium powder, chromium powder and an adhesive; (2) putting the coated workpiece into a microwave device, and performing microwave heating in a nitrogen atmosphere; and (3) performing surface cleaning and polishing of the workpiece after the microwave effect to obtain a titanium nitride / chromium nitride coating on the surface of the workpiece. With a high heating speed, the method disclosed by the invention can obtain the required coatings with different thickness; and the binding force between the coating and the workpiece is strong.

Description

(1) Technical field [0001] The invention relates to a coating manufacturing technology, in particular to a preparation method of a titanium-chromium (TiN / CrN) coating. (2) Background technology [0002] Titanium nitride / chromium (TiN / CrN) coating is a new type of hard coating with excellent performance. It is widely used in many fields such as cutting tools and molds, and has great application prospects in engineering. At present, TiN / CrN coatings are mainly manufactured by physical vapor deposition (PVD), chemical vapor deposition (CVD) and other technologies. Among them, chemical vapor deposition is gradually replaced by physical vapor deposition due to the thermal stress caused by high temperature and its waste harming the environment. ; Physical vapor deposition is environmentally friendly at low temperature, but the equipment investment is large, the shape and size of the parts are limited, the formed coating is thin and the coating is easy to peel off. (3) Contents ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/08C23C8/24B22F1/00
Inventor 楼白杨
Owner ZHEJIANG UNIV OF TECH
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