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基于正交试验的圆柱电极参数对电火花沉积质量影响分析 被引量:4

Analysis of the influence of cylindrical electrode parameters on electro-spark deposition quality based on orthogonal experiment
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摘要 在圆柱电极与基体线接触情况下,设计并进行了电火花沉积正交试验,分析了电极直径、电极厚度和电极转速对质量转移效率、沉积效率和沉积层表面粗糙度的影响,并优化了圆柱电极参数.结果表明,在一定试验条件下,采用圆柱电极能够获得较均匀致密的沉积层,随着电极直径与电极转速的增大,间隙放电数量增加,火花和飞溅增多,沉积层表面粗糙度增加,质量转移效率和沉积效率减小;随着电极厚度的增大,短路放电次数增多,空载数量减少,质量转移效率和沉积效率增大.影响沉积层质量转移效率和沉积效率的主次因素按由大到小的顺序为电极直径、电极转速、电极厚度;影响沉积层表面粗糙度的主次因素按由大到小的顺序为电极厚度、电极转速、电极直径.优化圆柱电极参数下获得的质量转移效率为82.48%,沉积效率为0.336 mg/s,表面粗糙度为0.072 mm,沉积层内部未出现裂纹和孔隙等缺陷,且与基体呈良好的冶金结合. By designing the orthogonal test of electro-spark deposition under the line contact condition between cylindrical electrode and substrate,the influence of electrode diameter,electrode thickness and electrode rotation speed on the mass transfer efficiency,deposition efficiency and surface roughness of the coating is analyzed,and the parameters of the cylindrical electrode are optimized.The results show that under certain test conditions,a more uniform and dense coating can be obtained by using cylindrical electrode.With the increase of electrode diameter and electrode rotation speed,the number of gap discharges increases,sparks and splashes increase,and the surface roughness of the coating increase,the mass transfer efficiency and deposition efficiency decrease.As the electrode thickness increases,the number of short-circuit discharge increases,the number of no-loads decreases,and the mass transfer efficiency and deposition efficiency increase.The major and minor factors affecting the quality transfer efficiency and deposition efficiency of the coating are electrode diameter,electrode rotation speed,and electrode thickness respectively in descending order.The major and minor factors affecting the surface roughness of the coating are electrode thickness,electrode rotation speed,and electrode diameter respectively in descending order.Under the optimized cylindrical electrode parameters,the mass transfer efficiency is 82.48%,the deposition efficiency is 0.336 mg/s,and the surface roughness is 0.072 mm.There are no defects such as cracks and pores in the coating,and it has a good metallurgical bonding with the substrate.
作者 王顺 韩红彪 李世康 李梦楠 WANG Shun;HAN Hongbiao;LI Shikang;LI Mengnan(Henan University of Science and Technology,Luoyang,471003,China)
机构地区 河南科技大学
出处 《焊接学报》 EI CAS CSCD 北大核心 2021年第7期37-43,I0004,共8页 Transactions of The China Welding Institution
基金 国家自然科学基金资助项目(51375146) 国家智能制造综合标准化项目(2018ZNZX01-02) 河南省高等学校重点科研项目(17A460012)。
关键词 电火花沉积 圆柱电极 线接触 质量转移效率 沉积效率 electro-spark deposition cylindrical electrode line contact mass transfer efficiency deposition efficiency
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