【作者】 张笃飞；

【导师】 索来春；

【作者基本信息】 哈尔滨工业大学 ， 机械电子工程， 2011， 硕士

【摘要】 电解质-等离子加工技术是建立在等离子化学及电化学的基础上,对金属材料进行表面处理,改善金属表面质量,达到抛光要求。该技术特别适用于形状复杂不易进行机械抛光的零件。同时该技术是一项“绿色”加工工艺,对环境无污染,相比其它抛光方法具有不可比拟的优势。本文主要通过系统试验,分析电解液的不同参数条件对电解质-等离子加工效果的影响。对不锈钢材料进行工艺试验,探索电解质-等离子加工工艺,研究加工后材料的性能。以表面粗糙度值为试验指标进行电解液温度、浓度、流速参数的正交试验,利用极差分析得出不同参数对加工效果影响的主次顺序及最优组合。同时,从经济角度出发,以去除速率为试验指标的正交试验来验证试验结果,利用方差分析得出不同参数的显著性水平。从材料去除速度、表面粗糙度、耐腐蚀性等方面分析电解液不同参数对材料加工后表面性能的影响,根据加工效果对比,确定电解液的合理参数值,实现参数优化。优化后,对加工样件与原始样件进行性能对比,结果表明:材料表面微观形貌得到了明显改善;表面粗糙度值Ra由0.133μm降到0.064μm;采用电化学方法考察耐蚀性的变化,极化曲线测试结果表明腐蚀电位正移,由-0.276V变为-0.224V,耐蚀性显著提高;表面光亮度由2级提高为5级,得到具有镜面光泽的表面;表层硬度HV由199.30变为189.24。从上述各方面的性能对比分析,验证电解液参数优化的合理性。更多还原

【Abstract】 Electrolyte - Plasma processing technology, by means of plasma chemistry reaction and electrochemistry reaction, is a specific technology applied in the treatment of metal surfaces to improve the finishing quality of the metal for polishing. It is especially applied for polishing parts with complex shapes, making it difficult to mechanical polishing. Additionally and more importantly, Electrolyte - Plasma processing technology is environment-friendly. It has far more advantages than other polishing methods. This thesis, based on systematic tests, analyzes the performance of the Electrolyte - Plasma processing technology under different electrolytes parameters.This thesis studies the Electrolyte - Plasma processing techniques by analysis of the performance of processed materials, utilizing stainless steel as the subject of analysis. The orthogonal experiment is respectively conducted on parameters of the electrolyte temperature, concentration and flow rate, with the value of surface roughness as the index. Then based on the method of range analysis , the order of the affecting degree of the three parameters on the processing effect is confirmed and the optimal parameters combination is determined. Taking economic effects into consideration, another orthogonal experiment, using the value of removal rate as the index, are respectively conducted on all three parameters either to confirm the results of the first orthogonal experiments. Then a significant level analysis of the three parameters is made by means of Analysis of Variance. Tests on the three parameter’s affecting on the result of the polishing process are respectively conducted, with the value of removal rate, surface roughness and corrosion resistance as the indexes. Through this series of tests, the most reasonable value of each parameter is determined by comparing respective processing performance. In this way, each parameter’s optimization is finally accomplished.A comparison on metal’s surface performance before and after applying the optimum proposal shows: the material surface micro-topography is greatly improved; The surface roughness value (Ra) is reduced from 0.133μm to 0.064μm; The corrosion resistance is greatly improved according to a measurement test of Corrosion Electrochemistry and a Polarization curve test indicates that corrosion potential moved positively from -0.276V to -0.224V; The surface smoothness degree is increased from 2 to 5 and the processed material ends up with a surface with a mirror luster; The surface hardness value (HV) declines from 199.30 to 189.24. All these comparative analysis from various aspects of performances verify the reasonableness of the electrolyte parameter optimization.更多还原