Millisecond laser processing and postprocessing process for no-recasting-layer micro-deep holes

A laser processing and micro-deep hole technology, applied in laser welding equipment, metal processing equipment, manufacturing tools, etc., can solve problems such as recasting layers, and achieve low cost, clear outline, and high efficiency

Inactive Publication Date: 2011-07-20
XI AN JIAOTONG UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to provide a millisecond laser processing and post-processing technology for micro-deep holes without recasting layer, which has the characteristics of low cost, high efficiency and simple operation, and solves the problems that often occur when high-power lasers process micro-deep holes on metals. The problem of recasting layer and micro-crack defects can obtain high-quality micro-deep holes with smooth hole walls and clear outlines

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  • Millisecond laser processing and postprocessing process for no-recasting-layer micro-deep holes

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Embodiment Construction

[0020] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0021] In terms of millisecond laser hole processing, many studies only focus on the influence of laser parameters on hole geometry, and study the effects of laser pulse energy, pulse width, focusing conditions, and repetition frequency on drilling quality, without comprehensive consideration of various parameters There is no in-depth study on the recasting layer specifically for the factors that affect each other. The invention aims to comprehensively consider the influence of various parameters on the hole processing quality, and finds a method that can not only retain the high efficiency of millisecond laser, but also greatly improve the processing quality.

[0022] The purpose of the present invention is to provide a millisecond laser processing and post-processing technology for micro-deep holes without recasting layer, using high-power lasers and optimi...

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Abstract

The invention provides a millisecond laser processing and postprocessing process for no-recasting-layer micro-deep holes, which comprises the following steps of: spraying a high temperature resistant ceramic coating on the surface of a turbine blade, and performing micro-deep hole deep processing by using a high-power millisecond laser according to optimized laser parameters obtained through an orthogonal experiment to obtain micro-deep holes with the minimum recasting layer depth; soaking the processed micro-deep holes in chemical acid solution for corrosion; and obtaining the no-recasting-layer micro-deep holes. The micro-deep holes are processed by using parameter-optimized laser, and the micro-deep holes with the thinnest recast layer are obtained; the micro-deep holes are corroded by specially prepared acid solution for a certain period of time, and the recast layer is thoroughly etched off; and the composite processing method has the characteristics of low cost, high efficiency and simple operation, problems of recast layers and microcracks when the micro-deep holes are processed on metals through high-power laser are solved, and high-quality micro-deep holes with smooth hole walls and clear outlines are obtained.

Description

【Technical field】 [0001] The invention relates to a laser composite processing and shape modification method, in particular to a laser composite processing and post-treatment process for micro-deep holes without a recast layer. 【Background technique】 [0002] A gas turbine is a rotary impeller power mechanical device that converts the heat energy generated by the combustion of gas or liquid fuel (such as natural gas, fuel oil) into mechanical work. It is widely used in energy, aviation, transportation, national defense and other fields. And the key major equipment for the development of aviation industry. High-temperature turbine blades are located in the part of the gas turbine with the highest temperature (above 1400°C), the most complex stress, and the harshest environment. Its value accounts for nearly 50% of the total product and is a key component of the gas turbine. As the thrust and thrust-to-weight ratio requirements of large gas turbines continue to increase, the ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/36B23K26/42B23K26/382B23K26/70
Inventor 王恪典段文强梅雪松王文君赵书兴刘斌
Owner XI AN JIAOTONG UNIV
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