Skoczylas Agnieszka, Zaleski Kazimierz
Department of Production Engineering, Faculty of Mechanical Engineering, Lublin University of Technology, 36 Nadbystrzycka, 20-618 Lublin, Poland.
Materials (Basel). 2022 Sep 26;15(19):6677. doi: 10.3390/ma15196677.
This paper presents the results of research on the impact of finishing method on surface topography, surface roughness (parameters , , , , ), surface layer microhardness, residual stresses and fatigue life. Ring samples made of C45 steel were used to conduct the experiments. The following finishing machining methods were selected: slide burnishing, ball burnishing, centrifugal shot peening, centrifugal shot peening + slide burnishing and centrifugal shot peening + ball burnishing. In the first stage, the use of combined shot peening + burnishing enables microhardness to be increased on the surface layer, the values of residual stresses to be increased and the creation of characteristic machining traces on the surface, the so-called "dimples" (effect of centrifugal shot peening). On the other hand, burnishing (slide burnishing or ball burnishing) is aimed at smoothing the surface and providing favorable stereometric properties to the surface layer. It was noted that, after finishing, the surface roughness parameters decreased from 59% to 83% in relation to the reference surface. The exception is the centrifugal shot peening technology. The use of burnishing (slide or ball burnishing) after centrifugal shot peening reduces the surface roughness parameters by a maximum of 82% compared to the value after centrifugal shot peening. The highest increase in microhardness was obtained after centrifugal shot peening + slide burnishing ( = 105 HV 0.05), while the highest thickness ( = 120 μm) was obtained after centrifugal shot peening + ball burnishing. The combination of centrifugal shot peening and ball burnishing results in the highest absolute value of compressive residual stresses = 602 MPa and depth = 0.41 mm). Application of an additional operation after centrifugal shot peening increases fatigue life from 27% to 49%. ANOVA analysis of variance confirms the significance of the processing effect of centrifugal shot peening combined with slide burnishing (CSP + SB) and centrifugal shot peening + ball burnishing (CSP + BB) on the analyzed dependent surface.
本文介绍了关于加工方法对表面形貌、表面粗糙度（参数 、 、 、 、 ）、表面层显微硬度、残余应力和疲劳寿命影响的研究结果。采用C45钢制成的环形试样进行实验。选择了以下精加工方法：滑动滚光、滚珠滚光、离心喷丸、离心喷丸+滑动滚光和离心喷丸+滚珠滚光。在第一阶段，采用喷丸强化+滚光的组合能够提高表面层的显微硬度，增加残余应力值，并在表面形成特征性的加工痕迹，即所谓的“凹坑”（离心喷丸的效果）。另一方面，滚光（滑动滚光或滚珠滚光）旨在使表面光滑，并为表面层提供良好的立体测量性能。值得注意的是，精加工后，相对于参考表面，表面粗糙度参数降低了59%至83%。离心喷丸技术是个例外。与离心喷丸后的数值相比，在离心喷丸后采用滚光（滑动或滚珠滚光）可使表面粗糙度参数最大降低82%。离心喷丸+滑动滚光后获得了最高的显微硬度增加量（ = 105 HV 0.05），而离心喷丸+滚珠滚光后获得了最高的厚度 （ = 120 μm）。离心喷丸和滚珠滚光的组合产生了最高的压缩残余应力绝对值 = 602 MPa和深度 = 0.41 mm）。在离心喷丸后进行额外的操作可使疲劳寿命提高27%至49%。方差分析（ANOVA）证实了离心喷丸与滑动滚光（CSP + SB）以及离心喷丸+滚珠滚光（CSP + BB）的加工效果对所分析的相关表面具有显著性。
