METHOD AND APPARATUS FOR PREPARING FUNCTIONAL GRADIENT COATING BY USING LASER-TUNED CURRENT WAVEFORM

WIPO Patent Application WO/2023/230942

A1

The present invention relates to the field of combined machining in the special machining technology. Disclosed are a method and apparatus for preparing a functional gradient coating by using a laser-tuned current waveform. According to the present invention, by adjusting laser parameters, the current density can be increased, and the control of a current change waveform can be implemented. The laser-tuned current density is periodically and continuously changed, so that growth sections can be in corrugated meshing, and layer-to-layer interfaces are grown and embedded with each other, so that the tangential bearing stress is increased, and the stress does not abruptly change. In addition, a strong micro-area stirring effect formed by laser and a force impact effect can reduce the internal stress of the coating, increase the interlayer binding force and improve the comprehensive performance of the coating. The present invention is suitable for machining a high-quality functional gradient coating, and can be applied to special machining fields such as aerospace, mechanical engineering, and medical biology.

ZHANG ZHAOYANG (CN)
WU YUCHENG (CN)
LIU YANG (CN)
KONG DEZHI (CN)
XU KUN (CN)
ZHU HAO (CN)
ZHAO DOUYAN (CN)

PCT/CN2022/096506

December 07, 2023

June 01, 2022

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UNIV JIANGSU (CN)

C25D5/18

CN113737237A	2021-12-03
CN106048703A	2016-10-26
CN103590076A	2014-02-19
US20140061053A1	2014-03-06
CN109963966A	2019-07-02
CN109913919A	2019-06-21
CN102817051A	2012-12-12
CN112176383A	2021-01-05

NANJING DOYES INTELLECTUAL PROPERTY CO., LTD. (CN)

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