(1. 哈爾濱理工大學(xué) 國(guó)家地方聯(lián)合工程重點(diǎn)實(shí)驗(yàn)室，哈爾濱 150080；
2. 莆田學(xué)院 機(jī)電工程學(xué)院，莆田 351100)
摘 要: 結(jié)合菲克第二定律描述了前刀面刀屑的元素濃度分布，采用半無(wú)限長(zhǎng)模型，建立考慮溫度影響的刀屑元素?cái)U(kuò)散方程；通過(guò)分析切削過(guò)程中粘焊的形成過(guò)程，利用夾緊件和焊接件在不同溫度下的擴(kuò)散分別近似模擬粘焊未產(chǎn)生和產(chǎn)生時(shí)在不同溫度下的元素?cái)U(kuò)散情況，探究溫度和粘焊對(duì)元素?cái)U(kuò)散的影響；同時(shí)，結(jié)合擴(kuò)散試件在不同溫度下的元素濃度分布，采用數(shù)據(jù)擬合軟件進(jìn)行數(shù)據(jù)處理及參數(shù)的確定。研究表明：粘焊的產(chǎn)生并不影響擴(kuò)散的最終濃度，但在一定程度上影響擴(kuò)散的進(jìn)程；隨著溫度的升高，擴(kuò)散速率及擴(kuò)散距離都有相應(yīng)地增大。研究結(jié)果對(duì)于從微觀層面揭示原子運(yùn)動(dòng)規(guī)律，進(jìn)而提高刀具抗粘結(jié)破損性能具有重要意義。
關(guān)鍵字: 元素?cái)U(kuò)散；硬質(zhì)合金刀具；粘焊；擴(kuò)散方程
（1. College of Mechanical and Power Engineering, Harbin University of Science and Technology, Harbin 150080, China;
2. School of Electrical and Mechanical Engineering, Putian University, Putian 351100, China）
Abstract:Based on the Fick’s second law, the elements concentration distribution of the rake face was described and the semi-infinite length model was used to establish the diffusion equation of the rake face considering the influence of temperature. By analyzing the formation of the sticking-welding during the cutting process, the welded and clamping parts at different temperatures were used to approximately simulate the elements diffusion at different temperatures with or without sticking-welding, so the effects of temperature and sticking-welding on the elements diffusion can be explored. At the same time, combined with elements concentration distribution of the diffusion specimens at different temperatures, data processing and parameter determination were carried out by using data fitting software. The results show that sticking-welding does not affect the final diffusion concentration, but it affects the diffusion process to a certain extent, and with the increase of temperature, the diffusion rate and diffusion distance increase correspondingly, the results are significance for revealing the law of atom movement at microscopic level and improving the anti-adhesion and anti-fracture performance of carbide tool.
Key words: elements diffusion; carbide tool; sticking-welding; diffusion equation
