杨航城,卢雨,田海燕.工艺参数对镍钴合金胎体摩擦磨损性能的影响[J].表面技术,2020,49(6):168-176.
YANG Hang-cheng,LU Yu,TIAN Hai-yan.Effect of Process Parameters on Friction and Wear Properties of Ni-Co Alloy Carcass[J].Surface Technology,2020,49(6):168-176 |
| 工艺参数对镍钴合金胎体摩擦磨损性能的影响 |
| Effect of Process Parameters on Friction and Wear Properties of Ni-Co Alloy Carcass |
| 投稿时间：2019-11-07 修订日期：2020-06-20 |
| DOI：10.16490/j.cnki.issn.1001-3660.2020.06.020 |
| 中文关键词: 镍钴合金 电镀 摩擦因数 耐磨性 磨损机制 |
| 英文关键词:nickel-cobalt alloy electroplating friction factor wear resistance wear mechanism |
| 基金项目:航空科学基金资助项目（20150852016）；江苏省精密与微细制造技术重点实验室开放基金项目资助 |
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| 中文摘要: |
| 目的 研究镀液中氨基磺酸钴浓度、电流密度及糖精钠含量对低钴镍钴合金镀层摩擦磨损性能的影响，提高耐磨性能，利于后续电镀用于航空材料孔系加工的金刚石刀具。方法 在氨基磺酸盐镀液体系中，采用电沉积法制备低钴Ni-Co合金镀层。应用销盘式摩擦磨损试验机对镀层进行摩擦因数研究。采用三维形貌仪与LEICA DVM500显微镜观察镀层磨损宽度、深度与磨损形貌。分析不同电流密度、氨基磺酸钴浓度与糖精钠浓度对镀层摩擦因数、耐磨性能与磨损形貌的影响。结果 当钴盐质量浓度从6 g/L升至18 g/L时，摩擦因素从2.273下降至1.915，提高了镀层表面平整性，降低了摩擦因数。随钴盐浓度提高，磨损形式从粘着磨损为主转为以磨粒磨损为主，镀层的抗塑性流变能力与耐磨性能得到提高。随电流密度升高，镀层平均摩擦因数从1.132增加至2.346，上升了107%，表面平整性下降，磨损横截面面积呈上升趋势，镀层的耐磨性能减弱，磨损机制转为粘着磨损和磨粒磨损双重磨损形式。糖精钠的加入使得摩擦因数从0.926上升至2.429，增加了1.6倍，但其磨损量下降明显，且磨损机制以磨粒磨损为主。结论 提高钴盐浓度可细化晶粒，减小摩擦因数，提高镀层耐磨性，促进磨粒磨损发生。增大电流密度使得镀层晶粒粗大，致使摩擦因数升高，减小抗塑性变形能力，耐磨性能降低，促进粘着磨损发生。糖精钠有细晶作用，可缓解镀层磨损疲劳程度，提高其抗塑性流变能力，但对摩擦因数却起反向效果。综合，可选择电流密度2 A/dm2、钴盐质量浓度18 g/L及糖精钠质量浓度0.5 g/L作为工艺参数制备金刚石刀具胎体材料，由此获得的刀具具有较好的摩擦磨损性能，可提高使用寿命。 |
| 英文摘要: |
| The work aims to study the effect of cobalt salt concentration, current density, and sodium saccharin concentration on the friction and wear properties of low cobalt Ni-Co alloy coatings, and improve the wear resistance, so as to facilitate the subsequent electroplating of diamond tools for aerospace material hole processing. Low cobalt Ni-Co alloy coating was prepared by electrodeposition in sulfamate plating system. The friction factor of the coating was studied by pin-and-disk friction and wear tester. The wear width, depth and morphology of the coating were observed by three-dimensional shaper and LEICA DVM500 microscope. The effects of different current densities, cobalt sulfamate concentration and sodium saccharin concentration on friction coefficient, wear resistance and wear morphology of the alloy were analyzed. When the cobalt salt concentration was increased from 6 g/L to 18 g/L, the friction factor could be reduced from 2.273 to 1.915, improving the surface flatness of the coating and reducing the friction factor. With the increase of cobalt salt concentration, the wear form was mainly from adhesive wear to abrasive wear, improving the resistance to plastic rheology and wear resistance. With the increase of current density, the average friction coefficient of the coating increased from 1.132 to 2.346, with an increase of 107%, the surface flatness decreased, the wear cross section showed a steady upward trend, the wear resistance of the coating deteriorated, and the wear mechanism turned into a double wear form of adhesive wear and abrasive wear. The addition of sodium saccharin increased the friction factor from 0.926 to 2.429, with a 1.6-fold increase, but the wear amount decreased significantly, and the wear mechanism was dominated by abrasive wear. Increasing the concentration of cobalt salt can refine the grain and reduce the friction factor, thus improving the wear resistance of the coating and promoting the wear of the abrasive particles. Increasing the current density makes the grain of the coating coarse, increasing the friction factor, decreasing the resistance to plastic deformation, reducing the wear resistance, and promoting the adhesion wear. Sodium saccharin has fine crystal action, which alleviates the wear fatigue of the coating and improves its resistance to plastic rheology, but has a directional effect on the friction factor. Current density of 2 A/dm2, Co(NH2SO3)2 concentration of 18 g/L and C7H4NNaO3S of 0.5 g/L can be selected as the best parameters to prepare the diamond tool nickel-cobalt alloy carcass material and the tool thus obtained has good friction and wear performance and can prolong its service life. |
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