DLC涂层硬质合金微钻的制备及其切削性能 |
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作者姓名: | 马玉平 陈明 向道辉 孙方宏 |
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作者单位: | 上海交通大学机械与动力工程学院,中国上海200240 |
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基金项目: | 国家自然科学基金
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航空基础科学基金
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教育部新世纪杰出人才基金 |
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摘 要: | 在硬质合金微型刀具加工高硅铝合金等难加工材料时,通过采用改进的热丝CVD装置开展了DLC涂层硬质合金微钻制备工艺优化,得到了最优沉积工艺,并配合高速加工高硅铝合金(Si15%)材料微小孔钻削性能对比试验,分析了刀具的磨损机理.结果表明:两步预处理方法适合复杂形状硬质合金衬底的预处理方法.钻削高硅铝合金时,DLC涂层具有低摩擦系数和高耐磨损特性,同等切削条件下,涂层微钻的切削寿命比未涂层硬质合金微钻提高了10倍.
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关 键 词: | DLC涂层 偏压增强HFCVD 硬质合金切削刀具 微钻削 切削性能 DLC film bias-enhanced HFCVD cobalt-cemented tungsten carbide cutting tool micro-drilling cutting performance 涂层硬质合金 微钻 切削性能 CUTTING PERFORMANCE TUNGSTEN CARBIDE cutting performance tool times metal matrix composite conditions Experimental results show complex cemented carbide substrates good adhesive strength diamond film volume |
收稿时间: | 2006/6/27 0:00:00 |
修稿时间: | 2006/9/8 0:00:00 |
FABRICATION OF DLC COATED COBALT-CEMENTED TUNGSTEN CARBIDE MICRO-DRILLS AND THEIR CUTTING PERFORMANCE |
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Authors: | Ma Yuping Chen Ming Xiang Daohui Sun Fanghong |
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Institution: | School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China |
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Abstract: | In machining the particle reinforced aluminum based composite material with high Si content using the cobalt-cemented tungsten carbide micro cutting tools, diamond like carbon (DLC) films are deposited on cobalt-cemented tungsten carbide micro-drills with two-step pretreatment method. Characteristics of DLC coated tools are investigated in bias-enhanced HFCVD system with the optimized hot filament arrangement. The optimization deposition technology is obtained and the wear mechanism of cutting tools is analyzed. The drilling performance of DLC coated tools is verified by the experiments of cutting particle reinforced aluminum based composite material (Si 15% in volume) compared with uncoated ones. Experimental results show that the two-step pretreatment method is appropriate for complex shaped cemented carbide substrates and ensures the good adhesive strength between the diamond film and the substrate. The cutting performance of DLC coated tool is enhanced 10 times when machining the Si particle reinforced aluminum based metal matrix composite compared with that of uncoated ones under the same cutting conditions. |
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Keywords: | DLC film bias-enhanced HFCVD cobalt-cemented tungsten carbide cutting tool micro-drilling cutting performance |
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