东北大学学报(自然科学版) ›› 2021, Vol. 42 ›› Issue (7): 972-979.DOI: 10.12068/j.issn.1005-3026.2021.07.010

• 机械工程 • 上一篇    下一篇

不锈钢材料预应力磨削表面耐蚀性能数值模拟

侯壮壮1, 修世超1, 王雨时2, 姚云龙1   

  1. (1. 东北大学 机械工程与自动化学院, 辽宁 沈阳110819; 2. 沈阳航空航天大学 机电工程学院, 辽宁 沈阳110136)
  • 修回日期:2020-12-17 接受日期:2020-12-17 发布日期:2021-07-16
  • 通讯作者: 侯壮壮
  • 作者简介:侯壮壮(1994-),男,辽宁沈阳人,东北大学博士研究生; 修世超(1959-),男,内蒙古赤峰人,东北大学教授,博士生导师.
  • 基金资助:
    国家自然科学基金资助项目(51775101); 中央高校基本科研业务费专项资金资助项目(N180306003).

Numerical Simulation on Corrosion Resistance of Pre-stress Grinding Surface of Stainless Steel

HOU Zhuang-zhuang1, XIU Shi-chao1, WANG Yu-shi2, YAO Yun-long1   

  1. 1. School of Mechanical Engineering & Automation, Northeastern University, Shenyang 110819, China; 2. School of Mechatronics Engineering, Shenyang Aerospace University, Shenyang 110136, China.
  • Revised:2020-12-17 Accepted:2020-12-17 Published:2021-07-16
  • Contact: XIU Shi-chao
  • About author:-
  • Supported by:
    -

摘要: 为探究预应力磨削后表面腐蚀演变机理及磨削参数对不锈钢耐蚀性的影响,以304不锈钢为研究对象,建立了考虑预应力磨削表面形貌特征的不锈钢耐蚀性能数值模型.首先,推导了粗糙表面腐蚀场演变的相场方程.其次,建立了预应力磨削后工件表面形貌模型.最后,搭建了具有非高斯分布磨粒特征的自相关砂轮表面地貌模型,应用所建模型探究了不锈钢材料预应力磨削表面的耐蚀性能.与已有研究结果相对比,所得结论符合一般性规律,验证了所提方法的合理性.结果表明,预应力磨削表面在腐蚀环境中具有“抛光效应”,随着腐蚀时间延长,表面耐蚀性增强;在使用冷却液的工况下,适当增大预应力和砂轮线速度、减小进给速度有利于改善磨削后不锈钢材料加工表面的耐蚀性能;当预应力给定时,仍可通过优化砂轮线速度和进给速度的办法来进一步改善不锈钢工件的耐蚀性能.

关键词: 预应力磨削;表面形貌;不锈钢耐蚀性;相场腐蚀模型;抛光效应

Abstract: In order to explore the evolution mechanism of surface corrosion of pre-stress grinding and the influence of grinding parameters on the corrosion resistance of stainless steel, 304 stainless steel was taken as the research object, a numerical model considering the influence of pre-stress grinding surface topography on the corrosion resistance of stainless steel was established. Firstly, the phase field equation for the corrosion field of rough surfaces was derived. Secondly, the surface topography model of the workpiece of pre-stress grinding was established. Finally, an auto-correlation wheel surface model with non-Gaussian distribution characteristics was built. With all the built models, the corrosion resistance of pre-stressed grinding surfaces was explored. Compared with the existing research results, the conclusions obtained conform to the general law, which verifies the rationality of the proposed method. The results showed that the pre-stress grinding surface has the "polishing effect" in the corrosive environment. As the corrosion time extends, the surface corrosion resistance is enhanced. In the condition of using coolant, appropriately increasing the pre-stress, wheel speed, and reducing feed speed can improve the corrosion resistance of the machined surface. When the pre-stress is a fixed value, the method of optimizing the linear speed and feed speed of the grinding wheel could also be used to further improve the corrosion resistance of the stainless steel workpiece.

Key words: pre-stress grinding; surface topography; corrosion resistance of stainless steel; phase field corrosion model; polishing effect

中图分类号: