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Buildup forming on tools at mechanical metal surface-hardening
The International Journal of Advanced Manufacturing Technology ( IF 2.9 ) Pub Date : 2021-06-08 , DOI: 10.1007/s00170-021-07334-6
Sergey Egorov , Andrej Olejnik , Alexey Kapitanov , Islam Alexandrov

When machining the parts, an unwanted buildup formation often appears on the working surface of a tool. As a result, dimensions and geometry of the working part of the tool change. The roughness of the machined surface and pulling force increase and unwanted vibrations appear. The work objective was to determine the possibilities of limiting or total elimination of the buildup forming. The research study was carried out using the samples made of alloyed manganese steel grade 15G by GOST 4543 (analogue of AISI 1016) and carbonous quality steel grade 45 by GOST 1050 (analogue of AISI 1045). Hardening was carried out with a smoothing rate of 1 up to 500 mm/s at a pressure in the contact zone from 50 to 1250 MPa and a change in the emerging longitudinal force in the range from 0 to 3 kN. It was found that a deformation rate, contact pressure magnitude, properties of the material being machined, and the lubricant have the greatest influence on buildup forming. The article shows that during steel hardening by smoothing with increasing contact pressure in the tool-part zone, the process of buildup forming occurs according to different mechanisms and appears in three specific zones: in the zone of low contact pressure, where buildup occurs; in the zone of medium contact pressure, where the growth occurs within acceptable limits; in the zone of catastrophic buildup forming.



中文翻译:

机械金属表面硬化工具上的堆积成型

在加工零件时,工具的工作表面上经常会出现不需要的堆积物。结果,刀具工作部分的尺寸和几何形状发生了变化。加工表面的粗糙度和拉力增加并出现不需要的振动。工作目标是确定限制或完全消除堆积成型的可能性。研究使用由 GOST 4543(AISI 1016 的类似物)合金钢等级 15G 和 GOST 1050(AISI 1045 的类似物)45 级碳素钢制成的样品进行。在接触区压力为 50 至 1250 MPa 和出现的纵向力的变化范围为 0 至 3 kN 下,以 1 至 500 mm/s 的平滑速率进行硬化。发现变形率、接触压力大小、被加工材料的特性,润滑剂对堆积成型的影响最大。文章表明,在工具零件区随着接触压力的增加通过平滑硬化钢时,堆焊成形过程根据不同的机制发生,并出现在三个特定区域:在低接触压力区,在那里发生堆焊;在中等接触压力区,生长发生在可接受的范围内;在灾难性的堆积形成区。在低接触压力区,发生堆积;在中等接触压力区,生长发生在可接受的范围内;在灾难性的堆积形成区。在低接触压力区,发生堆积;在中等接触压力区,生长发生在可接受的范围内;在灾难性的堆积形成区。

更新日期:2021-06-08
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