以複合電鑄法製作顆粒強化銅基複合材料

Abstract

本研究係探討Cu/SiC及Cu/TiO2複合電鑄，研究電流密度、添加至鑄液的顆粒導電度濃度對其電鑄成品中粉末含量之影響，並探討電鑄成品中粉末含量對其硬度、導電度、抗彎強度及放電加工等性質的影響。同時並對電鑄成品表面進行觀察分析。 研究結果顯示以複合電鑄法製作Cu/SiC及Cu/TiO2銅基複合材料，對於銅基材之機械性質可有明顯的提升。Cu/SiC複合電鑄成品中含7.16% SiC時，硬度可達261HV，含3.75% SiC時，抗彎強度為182MPa; Cu/TiO2複合電鑄成品中含2.63% TiO2時，硬度可達158HV，含1.44%TiO2時，抗彎強度為242MPa。本研究所得之Cu/SiC 複合電鑄成品之SiC含量在2.96%以下時，其導電度尚可可維持在75%IACS以上；而Cu/TiO2複合電鑄成品中TiO2含量在2.63%以下時，其導電度尚可維持在70%IACS以上。而放電加工試驗結果顯示，以本研究所得之複合電鑄Cu/Sic 及CuTiO2材料做為放電加上工電極，對中碳鋼放電加工，其電極消耗比皆可控制在5%以下。 由各項結果顯示，複合電鑄適合製作銅基複合材料，加上電鑄適合製作精密複雜之形狀，因此以複合電鑄法製作電極材料為一集家之選擇。

This research studies the effects of current density, as well as conductivity and concentration of particles added to electrolyte to the powder quantity of Cu/SiC and Cu/TiO2 composite electroforming products It. also discusses the effects of powder quantity to the hardness, conductivity, bending strength and the proerties of electrode for Electric Discharge Machining (EDM) Also, it includes on analysis of the surface of the composite electroforming products. The outcome showes that Cu/SiC and Cu/TiO2 compostie materials fabricated by composite electroforming method have a noticeable improvement in mechanical properties of Cu-base composite While the guantity of SiC in Cu/SiC composite electroforming product reaches 7.16%, the hardness can reach 261 HV, and while Sic is 3.75%, the bending strength is 182 Mpa While the guantity of TiO2 in Cu/TiO2 composite electroforming product reaches 2.63%, the hardness can reach 158 HV; and while TiO2 is 1.44%，the bending strength is 242 Mpa. While SiC in Cu/Sic composite electroforming product is below 2.69, the conductivity can still maintain 75% IACS and above, While TiO2 in Cu/TiO2 compostite electroforming product is below 2.63%, the conductivity can still maintain 70% IACS and above. The EDM test showes that EDM of steel, using Cu/Sic and Cu/TiO2 composite electroforming products as electrode, can control the EDM-electrode comsumption ration below 5%. AII data showes that composite electroforming method is suitable for the fabrication of Cu-base composite. Moreover, as electroforming is suitable for precise complex shape, the composite electroforming is ideal for the fabrication of electrode materials.