自蔓延反应制备多层金刚石雕刻磨头的基础研究

发布时间：2018-04-19 02:07

本文选题：自蔓延 + 雕刻磨头　；参考：《南京航空航天大学》2017年硕士论文

【摘要】：本文针对传统金刚石雕刻磨头结合强度不高、金刚石易脱落、寿命不高等问题,基于自蔓延的方法制作了金刚石雕刻磨头。通过研究确定了适合用于生产雕刻磨头的胎体配方,并进行了相应的磨削研究。本文完成的主要研究工作包括:(1)设计开发自蔓延金刚石雕刻磨头的制作方案,包括胎体结合剂、金刚石磨粒的选择,确定加工工序;(2)对反应的绝热燃烧温度进行分析,指出体系要发生自蔓延反应需进行预热处理;(3)运用差热分析,分析结合剂组分不同及金刚石的存在与否对自蔓延反应临界温度的影响;(4)配置五组不同成分的结合剂配方,压制成块,进行烧结。运用扫描电镜、X射线衍射分析等手段了解结合剂组分及成型密度不同对反应速度及反应后节块形貌的影响,分析形成机理,初步确定适合用于生产雕刻磨头的胎体配方;(5)在以上基础上制作三组含金刚石的雕刻磨头节块,通过理化分析等手段找出适合用于生产的胎体配方,确定反应机理,对反应后金刚石的热损伤进行分析;进行磨削实验,了解自蔓延金刚石雕刻磨头的失效过程。
[Abstract]:Aiming at the problems of low bond strength, easy exfoliation and low life of traditional diamond engraving grinding head, a diamond engraving grinding head is made based on self-propagating method in this paper.The matrix formula suitable for the production of engraved grinding head was determined and the corresponding grinding research was carried out.The main research work accomplished in this paper includes the design and development of the self-propagating diamond engraving grinding head, including the selection of matrix binder, the selection of diamond abrasive particles, and the determination of processing procedure, such as the adiabatic combustion temperature of the reaction, and the analysis of the adiabatic combustion temperature of the reaction.It is pointed out that the self-propagating reaction needs preheat treatment by differential thermal analysis (DTA) to analyze the effect of different composition of binder and the existence of diamond on critical temperature of SHS.Pressing into blocks and sintering.By means of scanning electron microscopy (SEM) and X-ray diffraction (XRD), the effects of different composition of binder and forming density on the reaction rate and the morphology of the post-reaction segment were investigated, and the formation mechanism was analyzed.On the basis of the above, three groups of engraved grinding head blocks containing diamond were made. By means of physical and chemical analysis, the matrix formula suitable for production was found out, and the reaction mechanism was determined.The thermal damage of diamond after reaction is analyzed and the failure process of self-propagating diamond engraving grinding head is understood by grinding experiment.
【学位授予单位】：南京航空航天大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TG74

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