超硬磨具陶瓷结合剂增韧补强的研究进展

Research Progress on Toughening and Strengthening of Vitrified Bond in Super-abrasive Grinding Tools

基于陶瓷结合剂超硬磨具优异的耐热、耐腐蚀和自锐能力,越来越多地被用于各种传统材料及难加工材料的磨削加工。但由于结合剂的脆性及低抗拉强度,陶瓷结合剂超硬磨具在高速和超高速磨削加工领域的应用还存在较大的难度。因此,针对陶瓷结合剂的增韧补强是研究和开发高速磨削用超硬材料磨具的关键因素。本文综述了国内外针对超硬磨具用的陶瓷结合剂增韧补强的研究进展,对陶瓷结合剂的微晶化增韧、第二相复合增韧和表面强化增韧的方法及机理进行了探讨。

Due to the excellent heat resistance, corrosion resistance and self-sharpening capabilities, vitrified bond super-abrasive grinding tools have increasingly been used in grinding of various conventional and difficult-to-machine materials. However, the brittleness and low tensile strength of vitrified bond limit its application in the field of high speed and ultra-high speed grinding. Therefore, improving the toughness and the strength of vitrified bond is a key factor to the research and developing of super-abrasive grinding tools for high speed grinding. In this paper, the recent progress of the research on the toughening and the strengthening of the vitrified bond in super-abrasive grinding tools were reviewed, and the methods and mechanisms of the toughening of micro-crystallization, second phase and the surface strengthening of vitrified bond were summarized and discussed.