Study of dry sliding wear characteristics of stellite 6B versus AISI M2 steel at various sliding velocities
Study of dry sliding wear characteristics of stellite 6B versus AISI M2 steel at various sliding velocities
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DOI：
10.1016/j.wear.2018.02.015
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发表时间：
2018-05
期刊：
影响因子：
5
通讯作者：
Wen Gao;Yong Lian;G. Xie;Jinfeng Huang;Le Zhang;Minyu Ma;Chao Zhao;Zunjun Zhang;Kaiqiang Liu;Shuguang Zhang;Jin Zhang
中科院分区：
文献类型：
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作者：
Wen Gao;Yong Lian;G. Xie;Jinfeng Huang;Le Zhang;Minyu Ma;Chao Zhao;Zunjun Zhang;Kaiqiang Liu;Shuguang Zhang;Jin Zhang
通过销-盘磨损试验和磨屑、摩擦层及磨损表面分析，系统研究了Stellite 6 B与AISI M2钢在不同滑动速度（0.95 ~ 4.71 m/s）下的干滑动磨损性能。通过热态硬度试验研究了销盘的力学性能。结果表明，在Stellite 6 B合金/钢摩擦系统中，随着滑动速度的增加，Stellite 6 B合金发生了由严重磨损向轻度磨损的转变。随着速度和载荷的增加，磨损表面温度升高，导致磨损表面氧化，销盘机械强度发生变化。影响磨损转变的是表面状态而不是机械强度的变化。Stellite 6 B合金的临界转变滑动速度为2.51 m/s，将滑动速度分为两个区域。当速度在0.95-2.51 m/s之间时，磨损机制由磨粒磨损和剥层磨损逐渐转变为粘着磨损，磨损率逐渐降低。而在滑动速度大于2.51m/s的区域，由于形成了机械混合层（MML），氧化磨损占主导地位，磨损率降低。
The wear performance of Stellite 6B versus AISI M2 steel in dry sliding at various sliding velocities (from 0.95 to 4.71 m/s) were systematically studied by pin-on-disc wear test and analysis of debris, tribo-layers and worn surfaces of both pin and disc. The mechanical performance of pin and disc were also studied by hot hardness test. The results showed that Stellite 6B underwent a severe-to-mild wear transition with the increase of sliding velocity in the Stellite 6B alloy/steel tribo-system. The temperature at worn surface increased with the increase of velocity and load, leading to the oxidation of the worn surface and the variation of mechanical strength of pin and disc. It was the surface state rather than the variation of the mechanical strength that impacted the wear transition. The critical transition sliding velocity for the Stellite 6B alloys was 2.51 m/s, which divided the sliding velocities into two regions. When the velocity was among 0.95–2.51 m/s, the wear mechanism turn from abrasive and delamination wear to adhesive wear gradually, resulting in the decrease of wear rate. While in the region that the sliding velocity was above 2.51 m/s, oxidative wear prevailed and the wear rate decreased due to the formation of mechanically mixed layer (MML).