中国机械工程

• 机械基础工程 • 上一篇    下一篇

光催化条件下钴基合金材料去除方法

郗枫飞;曾晰;计时鸣;陈国达   

  1. 浙江工业大学特种装备制造与先进加工技术教育部重点实验室,杭州,310023
  • 出版日期:2020-03-25 发布日期:2020-05-20
  • 基金资助:
    国家自然科学基金资助项目(51875526,51705462);
    浙江省自然科学基金资助项目(LY18E050023)

Cobalt-based Alloy Material Removing Method under Photocatalytic Conditions

XI Fengfei;ZENG Xi;JI Shiming;CHEN Guoda   

  1. Key Laboratory of Special Purpose Equipment and Advanced Manufacturing Technology(Zhejiang University of Technology) Ministry of Education,  Hangzhou, 310023
  • Online:2020-03-25 Published:2020-05-20

摘要: 针对应用于激光熔覆领域钴基合金材料难加工的问题,在分析钴元素及其化合物物化特性的基础上,结合紫外光催化和化学腐蚀作用,提出光催化条件下的钴基合金材料去除方法。建立了光催化条件下的材料去除模型,阐述了钴基合金在紫外光催化和化学腐蚀条件下的反应原理;设计了腐蚀液配置试验,试验确定采用碱性黄40+TiO2腐蚀液,并在此基础上设计基于气压砂轮平台的钴基合金加工试验。加工实例证明:结合紫外光催化和碱性黄40+TiO2化学腐蚀的预处理可显著提高钴基合金机械材料去除率,并减小表面粗糙度和减少表面缺陷;试验证明:30 min预处理后机械材料去除率可提高2~3倍,加工效率提升40%以上,并避免材料过度去除,从而验证了该方法的合理性和有效性。

关键词: 钴基合金, 光催化, 化学腐蚀, 机械材料去除率, 表面质量

Abstract: Cobalt-based alloy materials were widely used in laser cladding and the difficult processing problems were exhibited. Based on the analyses of the physical properties and chemical reaction characteristics of cobalt and its compounds, combined ultraviolet(UV) photocatalysis and chemical corrosion, a method for cobalt-based alloy removing materials under photocatalytic conditions was proposed. The mechanism model of material removal method under photocatalytic conditions was established, and the reaction principle of cobalt-based alloys in combination with UV photocatalysis and chemical corrosion solution was described. The corrosion solution configuration test was designed and basic yellow 40+TiO2 corrosion solution was determined through multiple sets of comparative tests. On the basis of the results of corrosion solution configuration test, a cobalt-based alloy machining tests were established based on a pneumatic grinding wheel test platform. The processing examples prove that the combination of UV photocatalysis and basic yellow 40+TiO2 chemical corrosion pretreatment may significantly increase the mechanical material removal rate of cobalt-based alloy materials, and effectively reduce the surface roughness and reduce the surface defects. At the same time, the mechanical material removal rate of the cobalt-based alloy coatins may be increased by 2 to 3 times after 30 minutes of pretreatment. Processing efficiency may be increased by more than 40% while avoiding excessive material removal. It is anticipated that the experiments verify the rationality and effectiveness of the method.

Key words: Co-based alloy, photocatalysis, chemical corrosion, mechanical material removal rate(MRR), surface quality

中图分类号: