| 袁和平,高航,郭东明.电镀镍钴合金多层磨粒砂轮电解修整机理[J].,2012,(2):197-202 |
| 电镀镍钴合金多层磨粒砂轮电解修整机理 |
| Electrolytic dressing mechanism of electroplated multilayer abrasive wheel with nickel cobalt alloy |
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| DOI：10.7511/dllgxb201202007 |
| 中文关键词: 镍钴合金镀层 电镀砂轮 电解修整 超硬磨粒 |
| 英文关键词: electroplated nickel cobalt alloy electroplated wheel electrolytic dressing superabrasive |
| 基金项目:国家自然科学基金资助项目(50875034);“八六三”国家高技术研究发展计划资助项目(SQ2008AA04XK1478912). |
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| 中文摘要: |
| 修整是多层电镀超硬磨粒砂轮精密磨削的关键技术之一．电镀镍钴合金硬度和强度高,是理想的超硬磨料砂轮结合剂；但同时也导致砂轮修整困难．为此对镍钴合金镀层的电解修整机理进行了研究．首先,根据标准电极电位的理论分析了镍钴合金电解修整的可行性；然后,采用电化学分析仪测试了镍钴合金镀层在NaNO 3溶液中的极化曲线,表明极化曲线存在钝化区；最后,进行了电解修整镍钴合金镀层CBN砂轮试验,结果表明对于2 V和5 V的电解修整电压,较高的电解电压有利于电镀镍钴合金超硬磨料砂轮电解修整． |
| 英文摘要: |
| Dressing is one of key technologies for the electroplated multilayer superabrasive wheel used in precision grinding. Because of the high hardness and strength of electroplated nickel cobalt (Ni-Co) alloy, which is an ideal bonding for superabrasive wheel, the electroplated superabrasive wheel is hard to true or dress. For this purpose, the mechanisms of electrolytic dressing of the Ni Co alloy bonding electroplated wheel were studied. Firstly, based on the standard electrode potential, the feasibility of the electrolytic dressing of Ni Co alloy bonding was analyzed in terms of theory. Secondly, the polarization curve of the electroplated Ni Co alloy layer in NaNO 3 solutions was measured by an electrochemical analyzer. The testing results show that there is a passivating region on the curve. At last, the electrolytic dressing experiments on an electroplated CBN wheel with Ni Co alloy bonding were conducted. The experimental results show that the higher electrolytic voltage is of advantage to the electrolytic dressing of Ni Co alloy bonding when the electrolytic voltage of 2 V and 5 V is used. |
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