Influence of Cooling Condition on the Performance of Grinding Hardened Layer in Grind-hardening

International Conference on Mechanical Engineering and Applied Composite Materials

机械制造;材料科学

Wang, G.C.^1,2 ; Chen, J.^1 ; Xu, G.Y.^1 ; Li, X.^1

School of Mechanical Engineering, Jiangsu University, Zhenjiang, Jiangsu

212013, China^1

Silicon Lake College of Vocational Technology, Kunshan, Jiangsu

215332, China^2

关键词: Cooling conditions;    Grind hardening;    Material surface;    Microstructure and properties;    Specimen surfaces;    Surface compressive stress;    Surface grinding machine;    Surface residual stress;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/307/1/012080/pdf
DOI  :  10.1088/1757-899X/307/1/012080

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

45# steel was grinded and hardened on a surface grinding machine to study the effect of three different cooling media, including emulsion, dry air and liquid nitrogen, on the microstructure and properties of the hardened layer. The results show that the microstructure of material surface hardened with emulsion is pearlite and no hardened layer. The surface roughness is small and the residual stress is compressive stress. With cooling condition of liquid nitrogen and dry air, the specimen surface are hardened, the organization is martensite, the surface roughness is also not changed, but high hardness of hardened layer and surface compressive stress were obtained when grinding using liquid nitrogen. The deeper hardened layer grinded with dry air was obtained and surface residual stress is tensile stress. This study provides an experimental basis for choosing the appropriate cooling mode to effectively control the performance of grinding hardened layer.