微粉金剛石表面鍍鈦對(duì)釬焊磨具性能的影響
發(fā)布時(shí)間:2018-04-19 21:17
本文選題:電鑄 + 釬焊; 參考:《中國(guó)表面工程》2017年04期
【摘要】:在微粉金剛石磨具的制備過(guò)程中,金剛石熱損傷和磨粒與結(jié)合劑間界面特性是影響磨具性能的主要因素。利用電鑄與釬焊相結(jié)合的工藝把表面鍍鈦和未鍍鈦兩種微粉金剛石磨料制備成磨具,并將其用于氧化鋁陶瓷的磨削試驗(yàn)。通過(guò)對(duì)釬焊后金剛石磨粒與釬料的界面分析,磨削力、磨粒脫落率以及工件表面粗糙度的比較,探討磨粒表面鍍鈦對(duì)釬焊微粉金剛石磨具性能的影響。結(jié)果表明,鍍鈦微粉金剛石表面鍍層在釬焊過(guò)程中對(duì)微粉金剛石起到包裹隔離的作用,可以降低微粉金剛石的熱損傷和石墨化;在利用兩種釬焊微粉金剛石磨具磨削氧化鋁陶瓷時(shí),鍍鈦微粉金剛石磨具的磨削力較小,磨料的脫落率也較少,且工件表面粗糙度值更低。綜合比較,磨粒表面鍍鈦后,可以減弱微粉金剛石的熱損傷,提高磨具的磨削性能。
[Abstract]:The thermal damage of diamond and the interfacial characteristics between abrasive particles and binder are the main factors that affect the properties of micro-powder diamond abrasives. Two kinds of micro-powder diamond abrasives, titanium plated and unplated, were prepared by electroforming and brazing, and used in the grinding test of alumina ceramics. The effects of titanium plating on the properties of brazed micro-powder diamond abrasives were discussed by analyzing the interface between diamond abrasive particles and solder after brazing, comparing grinding force, abrasive shedding rate and workpiece surface roughness. The results show that the coating on the surface of titanium micro-powder diamond has the function of encapsulating and isolating the fine powder diamond during brazing process, which can reduce the thermal damage and graphitization of micro-powder diamond. When two kinds of brazing micro-powder diamond abrasives are used to grinding alumina ceramics, the grinding force of titanium coated micro-powder diamond abrasives is smaller, the abrasive shedding rate is also less, and the surface roughness of workpiece is lower. Comprehensive comparison shows that the thermal damage of micro-powder diamond can be reduced and the grinding performance of grinding tool can be improved after titanium plating on the abrasive surface.
【作者單位】: 華僑大學(xué)機(jī)電及自動(dòng)化學(xué)院;
【基金】:國(guó)家自然科學(xué)基金(51275181)~~
【分類號(hào)】:TB306;TG74
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