Dry Sliding Wear Properties of Sub-Microcrystalline Ultra-Low Carbon Steel Produced by High-Pressure Torsion Straining
Dry Sliding Wear Properties of Sub-Microcrystalline Ultra-Low Carbon Steel Produced by High-Pressure Torsion Straining
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DOI：
10.2320/matertrans.md201118
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发表时间：
2012
影响因子：
1.2
通讯作者：
H. Kato;Y. Todaka;M. Umemoto;Kazunobu Morisako;Motonori Hashimoto;Masakazu Haga
中科院分区：
文献类型：
--
作者：
H. Kato;Y. Todaka;M. Umemoto;Kazunobu Morisako;Motonori Hashimoto;Masakazu Haga
本文首次研究了高压扭转（HPT）变形亚微晶超低碳钢的干滑动磨损性能。采用球-盘摩擦磨损试验方法研究了HPT过程中的圈数和摩擦副材料对磨损试验的影响。磨损试验在正常实验室空气气氛中进行，滑动速度为0.042m/s，施加载荷为39.6N。当球材料为硬质合金（WC/Co）时，HPT处理的盘的磨损深度随着HPT应变中的圈数的增加而减小。这可以通过硬度变化来解释，即，其中引入大应变的HPT处理的盘由于高硬度而表现出高的抗磨损性。另一方面，当球材料为高碳铬轴承钢（SUJ 2）时，圆盘试样的磨损深度随着圈数的增加而增加。磨损深度变化的不寻常行为被认为是由于HPT处理的钢盘和SUJ 2球之间的强烈粘附，因为超细晶粒试样的摩擦系数相当高。[doi：10.2320/matertrans.MD201118]
This study is the first to show dry sliding wear properties of sub-microcrystalline ultra-low carbon steel produced by high-pressure torsion (HPT) straining. Effects of number of turns in HPT process and counter materials in wear tests were investigated using a ball-on-disc friction method. Wear tests were carried out in a normal laboratory atmosphere of air at a sliding speed of 0.042m/s and an applied load of 39.6N. When the ball material was cemented carbide (WCCo), the wear depth of HPT-processed discs decreased with increasing the number of turns in HPTstraining. This was explained by the hardness variation, i.e. the HPT-processed discs in which large strain was introduced exhibit high anti-wear resistance due to the high hardness. On the other hand, when the ball material was high carbon-chromium bearing steel (SUJ2), the wear depth of disc specimens increased with increasing the number of turns. The unusual behavior of the wear depth variation was thought to be attributed to the intensive adhesion between the HPT-processed steel disc and the SUJ2 ball because the coefficient of friction was considerably high for the ultra fine-grained specimens. [doi:10.2320/matertrans.MD201118]