文献类型：期刊文献

英文题名：Study on the preparation method of electrochemical grinding electrolyte for 9Cr18Mo bearing steel and the performance of oxide film

作者：Nie, Long Wu, Huaichao Huang, Xu Jin, Zikang

第一作者：聂龙;Nie, Long

通信作者：Wu, HC[1]

机构：[1]Guizhou Univ, Sch Mech Engn, Guiyang 550025, Peoples R China;[2]Guizhou Inst Technol, Sch Mech Engn, Guiyang, Peoples R China

第一机构：Guizhou Univ, Sch Mech Engn, Guiyang 550025, Peoples R China

通信机构：corresponding author), Guizhou Univ, Sch Mech Engn, Guiyang 550025, Peoples R China.

年份：2025

外文期刊名：MATERIALS AND MANUFACTURING PROCESSES

收录：;EI(收录号：20251718297206);Scopus(收录号：2-s2.0-105003231048);WOS:【SCI-EXPANDED(收录号:WOS:001474220900001)】；

基金：This work was supported by Key Laboratory Project of Guizhou Higher Education Institutions (Grant No.Q.J.J[2023]009), Major Science and Technology Project in Guizhou Province (Grant No. Q.K.H.Z.D.Z.X.Z. [2019]3016), Key Laboratory Project of Guizhou Province (Grant No. Q. K.H.P.T ZSYS[2025]002) and Science and Technology Innovation Team Project in Guizhou Province (Grant No. Q.K.H.P.T.R.C[2020]5020) and Guizhou Provincial Basic Research Program (Grant No. Q.K.H.B.-ZK [2023] General 133).

语种：英文

外文关键词：9Cr18Mo bearing steel; electrochemical grinding; electrolyte optimization; uniform design; whale-genetic algorithm; oxide film

摘要：9Cr18Mo bearing steel is widely used in bearing manufacturing due to its high hardness, excellent wear resistance, and superior corrosion resistance. However, traditional grinding often causes defects like grinding burns, limiting its applications. This study investigates electrochemical grinding (ECG) for machining 9Cr18Mo bearings. Electrochemical tests identified the basic ECG electrolyte components suitable for 9Cr18Mo, followed by uniform design, stepwise linear regression, and a whale-genetic algorithm (WOA-GA) to optimize the electrolyte composition to be 14.356 wt.% NaNO3 + 7.841 wt.% Na2SO4. Under these conditions, the material removal rate (MRR) reached 0.118 g/min, with a surface roughness (Ra) of 1.124 mu m, indicating high efficiency and excellent surface quality. Scanning electron microscopy (SEM) and nanoindentation tests showed the oxide film's hardness decreased by 97.52% and elastic modulus by 91.79%, easing grinding challenges. This study establishes a foundation for ECG of 9Cr18Mo and offers insights for machining other difficult materials.