引用本文:沈剑云,尹刚刚,姜波,徐西鹏.微粉金刚石表面镀钛对钎焊磨具性能的影响[J].中国表面工程,2017,30(4):127~133
SHEN Jian-yun,YIN Gang-gang,JIANG Bo,XU Xi-peng.Effects of Titanium Coating of Micro-Powder Diamond on Properties of Brazed Abrasive Grit Tools[J].China Surface Engineering,2017,30(4):127~133
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微粉金刚石表面镀钛对钎焊磨具性能的影响
沈剑云, 尹刚刚, 姜波, 徐西鹏
华侨大学 机电及自动化学院, 福建 厦门 361021
摘要:
在微粉金刚石磨具的制备过程中，金刚石热损伤和磨粒与结合剂间界面特性是影响磨具性能的主要因素。利用电铸与钎焊相结合的工艺把表面镀钛和未镀钛两种微粉金刚石磨料制备成磨具，并将其用于氧化铝陶瓷的磨削试验。通过对钎焊后金刚石磨粒与钎料的界面分析，磨削力、磨粒脱落率以及工件表面粗糙度的比较，探讨磨粒表面镀钛对钎焊微粉金刚石磨具性能的影响。结果表明，镀钛微粉金刚石表面镀层在钎焊过程中对微粉金刚石起到包裹隔离的作用，可以降低微粉金刚石的热损伤和石墨化；在利用两种钎焊微粉金刚石磨具磨削氧化铝陶瓷时，镀钛微粉金刚石磨具的磨削力较小，磨料的脱落率也较少，且工件表面粗糙度值更低。综合比较，磨粒表面镀钛后，可以减弱微粉金刚石的热损伤，提高磨具的磨削性能。
关键词:  电铸  钎焊  镀钛  微粉金刚石  磨削  热损伤
DOI：10.11933/j.issn.1007-9289.20170108002
分类号:TG174.4
基金项目:国家自然科学基金（51275181）
Effects of Titanium Coating of Micro-Powder Diamond on Properties of Brazed Abrasive Grit Tools
SHEN Jian-yun, YIN Gang-gang, JIANG Bo, XU Xi-peng
College of Mechanical Engineering & Automation, Huaqiao University, Xiamen 361021, Fujian
Abstract:
In the process of manufacturing micro-powder diamond abrasive tools, the damage to the abrasive particles and the interface characteristics between the abrasive and the binder were the main factors affecting the performance of the diamond tools. Ti-coated and uncoated micro-powder diamond abrasive tools were prepared by using a combined process of electroforming and brazing. Then, two types of tools were applied to conduct grinding experiment of alumina ceramics. The effects of titanium coating of micro-powder diamond on the interface reaction of brazed abrasive grit tools were investigated, moreover, the grinding forces, grits loss rate and workpiece roughness were compared accordingly. Results show that the thermal damage and graphitization of micro-powder diamond have been reduced, due to the encapsulation and isolation effect of Ti-coated diamond. It is also found that the grinding forces,grits loss rate and the roughness of workpiece are much lower. In conclusion, Ti-coated diamond can reduce the thermal damage, accordingly improve the grinding performance.
Key words:  electroforming  brazing  Ti-coated  micro-powder diamond  grinding  thermal damage
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