激光诱导击穿光谱表征激光重熔后不锈钢的硬度  

Characterization of hardness of stainless steel after laser remelting by laser-induced breakdown spectroscopy

作　　者：叶宏基 孔令华 李鹏 黄旭 YE Hongji;KONG Linghua;LI Peng;HUANG Xu(School of Mechanical&Automotive Engineering,Fujian University of Technology,Fuzhou 350118,CHN;Digital Fujian Industrial Manufacture IoT Lab,Fuzhou 350118,CHN;Fujian Key Laboratory of Intelligent Machining Technology and Equipment,Fuzhou 350118,CHN)

机构地区：[1]福建工程学院机械与汽车工程学院,福建福州350118 [2]数字福建工业制造物联网实验室,福建福州350118 [3]福建省智能加工技术及装备重点实验室,福建福州350118

出　　处：《制造技术与机床》2023年第10期151-157,共7页Manufacturing Technology & Machine Tool

基　　金：福建省科技创新重点项目(2021G02009)。

摘　　要：为了探究激光诱导击穿光谱(laser-induced breakdown spectroscopy,LIBS)技术对激光重熔后不锈钢的硬度的表征,以激光重熔后的不锈钢为原材料,研究不同硬度的不锈钢对激光诱导等离子体的光谱特性和物理特性的影响,分析激光重熔后不同的激光功率和扫描速度对硬度的影响,分析不同硬度与特征谱线,以及不同硬度与等离子体电子温度的变化规律。实验结果表明:选择Fe、Si、Cr和Mn元素的特征谱线分析谱线强度和谱线强度比与硬度的关系,元素的原子谱线与硬度呈负相关,元素的离子谱线强度和原子谱线强度比与硬度呈正相关;选择Fe元素的4条离子谱线分析等离子体温度与硬度的关系,随着硬度增加,等离子体温度逐渐升高,线性相关系数为0.919。本研究表明LIBS技术有表征激光重熔后不锈钢硬度的潜力,为硬度表征提供了一种新方法。In order to explore the characterization of the hardness of stainless steel after laser remelting by laser induced breakdown spectroscopy technology,using stainless steel after laser remelting as raw material,the effect of stainless steel with different hardness on the spectral and physical characteristics of laser�induced plasma was studied,the effect of different laser power and scanning speed on the hardness after laser remelting was analyzed,the change rule of different hardness and characteristic spectral lines as well as the change rule of different hardness and plasma electron temperature were analyzed.The experimental results show that the characteristic spectral lines of Fe,Si,Cr and Mn were selected to analyze the relationship between spectral line intensity and hardness as well as the relationship between the ratio of the intensity of spectral lines and hardness,the atomic spectral lines of the elements are negatively correlated with hardness,while the intensity ratio of ionic spectral lines and atomic spectral lines is positively correlated with hardness.Four ionic spectral lines of Fe element were selected to analyze the relationship between plasma electron temperature and hardness.The higher the hardness,the higher the plasma electron temperature,the linear correlation coefficient is 0.919.From this study,it can be shown that LIBS technology has the potential to characterize the hardness of stainless steel after laser remelting,which provides a new method for hardness characterization.

关 键 词：激光诱导击穿光谱 激光重熔 特征谱线 不锈钢 硬度 

分 类 号：TN249[电子电信—物理电子学]