Fretting Wear Behavior of Medium Carbon Steel Modified by Low Temperature Gas Multi-component Thermo-chemical Treatment

It is found that the low-temperature decomposition of martensite in quenched medium-carbon steel occurs in two stages. In the first stage, the rate of decomposition is higher than that in the subsequent stage. Application of the neutron diffraction method allows the identification of two stages of transformation in the first stage of martensite decomposition. It is shown that the first stage is associated predominantly with carbon segregation at dislocations, and the second, with the outdiffusion of carbon from the supersaturated solid solution with the formation of dispersed particles of metastable carbides. It is shown that the change in the concentration of carbon and, accordingly, the degree of tetragonal lattice of martensite at aging and low tempering occurs to a certain limit, independent of the cooling rate during quenching and tempering temperature. This is due to the establishment of a relative equilibrium between a supersaturated solid solution and fine particles of metastable iron carbide. It is found that the determining process, which leads to a change in the microhardness the low-temperature decomposition, is the out diffusion of carbon from the supersaturated solid solution.

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Shot Peening Effects on Abrasive Wear Behavior of Medium Carbon Steel

Energy, Environment, and Sustainability - Automotive Tribology ◽

10.1007/978-981-15-0434-1_14 ◽

2019 ◽

pp. 269-285

Author(s):

Neeraj Kumar ◽

Jayant Singh

Keyword(s):

Carbon Steel ◽

Abrasive Wear ◽

Shot Peening ◽

Wear Behavior ◽

Medium Carbon Steel ◽

Medium Carbon ◽

Abrasive Wear Behavior

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Microstructure control of medium carbon steel joints by low-temperature linear friction welding

Science and Technology of Welding & Joining ◽

10.1080/13621718.2019.1600771 ◽

2019 ◽

Vol 25 (1) ◽

pp. 1-9 ◽

Cited By ~ 5

Author(s):

Ryosuke Kuroiwa ◽

Huihong Liu ◽

Yasuhiro Aoki ◽

Sungook Yoon ◽

Hidetoshi Fujii ◽

...

Keyword(s):

Carbon Steel ◽

Low Temperature ◽

Friction Welding ◽

Medium Carbon Steel ◽

Linear Friction Welding ◽

Microstructure Control ◽

Medium Carbon ◽

Linear Friction ◽

Steel Joints

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Wear Behavior of Medium-Carbon Steel with Different Laser-Textured Densities under Starved Lubrication

Coatings ◽

10.3390/coatings10121225 ◽

2020 ◽

Vol 10 (12) ◽

pp. 1225

Author(s):

Fanming Zeng ◽

Yuting Liu ◽

Feixian Shao ◽

Xiujuan Li ◽

Zhenglei Yu ◽

...

Keyword(s):

Carbon Steel ◽

Stress Distribution ◽

Wear Behavior ◽

Coupling Effect ◽

Equivalent Stress ◽

Medium Carbon Steel ◽

Textured Surfaces ◽

Medium Carbon ◽

Biological Surface ◽

Starved Lubrication

Five densities of laser-ablated micro-pits were fabricated onto medium-carbon steel surfaces based on the coupling effect of the biological surface. The effects of the surface textures on the wear behavior were investigated by sliding wear tests under starved lubrication. The results show that compared with the smooth sample, the biomimetic samples could effectively reduce friction and wear, and the tribological performance of the textured surfaces is closely related to the density of the bionic units. The equivalent stress distribution of the specimens was simulated by the finite element method. A uniform stress distribution is beneficial for effectively reducing the generation of wear cracks.

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Fretting wear of the nitrided medium carbon steel under line contact condition at an elevated temperature

Industrial Lubrication and Tribology ◽

10.1108/ilt-04-2019-0133 ◽

2019 ◽

Vol ahead-of-print (ahead-of-print) ◽

Author(s):

Guanghong Wang ◽

Guangwei He ◽

Shengguan Qu ◽

Hao Li ◽

Mushun Zhou ◽

...

Keyword(s):

Elevated Temperature ◽

Carbon Steel ◽

Wear Debris ◽

Medium Carbon Steel ◽

Contact Condition ◽

Fretting Wear ◽

Wear Loss ◽

Line Contact ◽

Medium Carbon ◽

Content Type

Purpose Fretting wear exists widely in the field of matching mechanical parts whereas previous research studies mostly focus on the point contact through a ball-plate tribometer. This paper aims to study the influence of wear debris on the fretting wear characteristics of the nitrided medium carbon steel under line contact condition at elevated temperature. Design/methodology/approach Fretting wear behavior of the nitrided medium carbon steel was experimentally investigated under line contact condition at elevated temperature and different normal loads without lubrication. Wear loss, worn surface and wear debris were studied to analyze the wear mechanism of nitrided steel. Findings The results showed that surface hardness of the medium carbon steel was notably improved because of the generation of a 230 µm nitrided case. Wear loss increased with the normal load, which was associated with the damage of a thin solid film formed by the wear debris, consisting of iron oxides and chromium oxide rather than only iron or iron oxides. The wear debris became partially amorphous and spherical because it was trapped within the contact interface and was ground, rolled, oxidized under line contact conditions. The spherical wear debris acted as a third body and formed a lubricating film between the contact faces. This lubricating film helped to stabilize the friction coefficient and reduced the wear rate, which further caused the acceleration of wear volume to gradually decrease. The wear mechanisms of the nitrided steel were oxidation wear, abrasive wear and fatigue spalling of the oxide layer. Originality/value The findings are helpful to understand the fretting wear behavior of the friction pair under line contact and enrich the fretting tribology theory.

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