A model to calculate the laser absorption property of actual surface

被引：34

作者：

Wang, Hongze ^{[1
]}

Kawahito, Yosuke ^{[1
]}

Yoshida, Ryouhei ^{[2
]}

Nakashima, Yuya ^{[3
]}

Shiokawa, Kunio ^{[3
]}

机构：

[1] Osaka Univ, JWRI, 11-1 Mihogaoka, Ibaraki, Osaka 5670047, Japan

[2] Osaka Univ, Grad Sch Engn, Suita, Osaka 5670871, Japan

[3] Fuji Elect Corp, Tokyo 1918502, Japan

来源：

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | 2018年 / 118卷

关键词：

Absorption rate; Rough surface; Fractal theory; Laser hardening; GEOMETRIC OPTICS APPROXIMATION; TEMPERATURE;

D O I：

10.1016/j.ijheatmasstransfer.2017.11.023

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Research on absorption rate could contribute to better understanding laser processing. In this paper, a mathematical model was developed to calculate the laser absorption rate of actual surface considering the fractal characteristic. Fractal parameters were determined based on the measured characteristic of surface roughness, surfaces that met the fractal nature were then built. A light tracing algorithm was developed to trace the route of light in multiple reflections through the surface rough structure, and the Fresnel equation was used to calculate the fraction of the absorbed light at each reflection. The experiment system to measure the absorption rate of blue laser in hardening based on the water calorimetric method was developed. The experimental absorption rate fit well with the theoretical value, verifying the model as a tool to calculate the absorption rate in laser hardening. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：562 / 569

页数：8

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