Leksycki Kamil, Feldshtein Eugene, Dyachkova Larisa, Arkusz Katarzyna, Ceglewski Maciej, Czerwiec Łukasz
Institute of Mechanical Engineering, University of Zielona Gora, 4 Prof. Z. Szafrana Street, 65-516 Zielona Gora, Poland.
The State Scientific Institution "Power Metallurgy Institute", Belarusian National Academy of Sciences, 41 Platonov Street, 220005 Minsk, Belarus.
Materials (Basel). 2024 Dec 20;17(24):6244. doi: 10.3390/ma17246244.
The manufacturing of work parts made of powder (sintered) steels is currently widespread in industry, as it provides minimal processing allowances and high dimensional accuracy, as well as the required properties and unconventional chemical composition. At the same time, their low tensile or bending strength must be considered a serious disadvantage. In order to minimize these disadvantages, a number of strengthening technologies are used, among which is the infiltration of porous base materials with metal alloys. In this study, the details of finish turning of sintered iron-graphite-based steel infiltrated with tin bronze with molybdenum disulfide addition are considered. Changes in the shape of chips and their geometric features, as well as the 3D parameters and topography features of the surface machined, are presented after finish turning with AH8015 carbide inserts. The cutting speed () and feed rate () were used as variable parameters. It was found that when turning the powder steels under study, the chips took the shape of small fragments or element chips, including segmented chips. For quenching steel, the formation of irregular lamellae was observed and for the initial state, a serrated chip was registered. For the initial state, a reduction in values was observed in the range of the of 50-100 m/min and of 0.05-0.075 mm/rev, and for quenching in the range of 225-250 m/min and 0.05-0.075 mm/rev. Compared to the initial state, for quenching, depending on the cutting parameters, a 14% reduction in the chip spreading ratio or an increase from 2 to 32% was registered. For the initial state and quenching, a decrease in the and parameters was achieved in the range of the of 200-250 m/min and of 0.05-0.075 mm/rev, and there was an increase in the range of 50-150 m/min and 0.125-0.15 mm/rev. Compared to the initial state, an increase in the parameter from 10 to 35% was observed for quenching. On the surfaces machined with = 50 m/min and = 0.05 mm/rev, waves and single significant peaks were observed. On the other hand, = 250 m/min and = 0.15 mm/rev provided classical feed tracks in the form of valleys and irregular ridges on the surfaces machined. The test results can be useful in the design and manufacturing of industrial parts made of powder steels.
由粉末（烧结）钢制成的工件制造目前在工业中广泛应用，因为它提供了最小的加工余量和高尺寸精度，以及所需的性能和非常规的化学成分。同时，它们较低的拉伸或弯曲强度必须被视为一个严重的缺点。为了尽量减少这些缺点，人们使用了多种强化技术，其中包括用金属合金对多孔基材进行浸渗。在本研究中，考虑了添加二硫化钼的锡青铜浸渗的烧结铁 - 石墨基钢的精车削细节。在用AH8015硬质合金刀片进行精车削后，给出了切屑形状及其几何特征的变化，以及加工表面的三维参数和形貌特征。切削速度（）和进给速度（）被用作可变参数。研究发现，在车削所研究的粉末钢时，切屑呈小碎片或单元切屑的形状，包括分段切屑。对于淬火钢，观察到不规则薄片的形成，而对于初始状态，记录到锯齿状切屑。对于初始状态而言，在切削速度为50 - 100 m/min和进给速度为0.05 - 0.075 mm/rev的范围内观察到值的降低，而对于淬火状态，在切削速度为225 - 250 m/min和进给速度为0.05 - 0.075 mm/rev的范围内观察到值的降低。与初始状态相比，对于淬火状态，根据切削参数，切屑扩展比降低了14%，或者增加了2%至32%。对于初始状态和淬火状态，在切削速度为200 - 250 m/min和进给速度为0.05 - 0.075 mm/rev的范围内，和参数降低，而在切削速度为50 - 150 m/min和进给速度为0.125 - 0.15 mm/rev的范围内，和参数增加。与初始状态相比，对于淬火状态，参数增加了10%至35%。在用切削速度 = 50 m/min和进给速度 = 0.05 mm/rev加工的表面上，观察到了波纹和单个明显的峰值。另一方面，切削速度 = 250 m/min和进给速度 = 0.15 mm/rev在加工表面上形成了呈山谷和不规则脊状的典型进给痕迹。测试结果对于粉末钢工业零件的设计和制造可能是有用的。
