Identification of a friction model for the bearing channel of hot aluminium extrusion dies by using ball-on-disc tests

Wang, Liliang; Zhou, Jie; Duszczyk, J.; Katgerman, L.

doi:10.1016/j.triboint.2012.01.010

Cited by 21 publications

(5 citation statements)

References 41 publications

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“…and among the most common and recent materials used under dry and lubricant contact conditions are mild steel, 26,27 brass 28,29 and aluminium. 30,31 In this study, mild steel (1020), aluminium (2000) and commercial brass were selected. Samples were prepared from the blocks of the material with dimensions 50 mm × 20 mm × 25 mm.…”

Section: Materials Selection and Experimental Proceduresmentioning

confidence: 99%

Wear behaviour and mechanism of different metals sliding against stainless steel counterface

Alotaibi

Yousif

Yusaf

2014

Proceedings of the Institution of Mechanical Engineers, Part J:

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Understanding the wear mechanism significantly contributes to the knowledge of tribology of common metals and assists in predicting, overcoming and preventing the failure of designed components. In the current study, wear and frictional performances of brass, aluminium and mild steel metals are investigated at different operating parameters, i.e. sliding durations (0–10 km) and applied loads (0–50 N) against stainless steel counterface under dry contact conditions. The experiments were performed using block on ring machine. To categorise the wear mechanism and the damage features on the worn surfaces and the collected debris, scanning electron microscopy was used. Thermal imager was used to understand the heat distribution in the contacted bodies and the interface regions. The results revealed that the operating parameters influence the wear and frictional behaviour of all the metals. Brass metal exhibited better wear and frictional behaviour compared to others. Three different wear mechanisms were observed, i.e. two-body abrasion (brass), three-body abrasion (aluminium) and adhesive (mild steel).

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Section: Materials Selection and Experimental Proceduresmentioning

confidence: 99%

Wear behaviour and mechanism of different metals sliding against stainless steel counterface

Alotaibi

Yousif

Yusaf

2014

Proceedings of the Institution of Mechanical Engineers, Part J:

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“…The literature about Cr(WC-Co)/(WC-Co) tribo system is very poor. The selection of testing parameters, such as pin/disk materials, sliding distance, size of the ball, and applied load, has to be considered carefully because of their direct influence on the contact pressure at the ball/disk interface, especially during the run-in period [26].…”

Section: Wear Testsmentioning

confidence: 99%

A study of the wear performance of duplex treated commercial low-alloy steel against alumina and WC balls

Beliardouh¹,

Nouveau²,

Walock³

et al. 2014

Surface and Coatings Technology

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is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible. The objective of this work is to study the improvement of the tribological properties of low alloy steel using a duplex treatment of low pressure carburizing and the deposition of a Cr-(WC-Co) coating by dual RF magnetron sputtering. The treatments result in a 500 μm thick carburized layer and a sputtered coating thickness of~2 μm. Tribological tests were made with a ball-on-disk tribometer under dry conditions with low load and low speed. The worn surfaces of the disk, the wear counterpart, and resulting debris were analyzed by X-ray diffraction, optical microscopy, optical profilometry, and a scanning electron microscope equipped with an energy-dispersive X-ray spectrometer. The wear performance of the samples was evaluated in terms of wear rates and friction coefficients during the sliding processes against two different counterparts. Experimental results have shown that sliding wear, of the investigated duplex treated low alloy steels, is strongly dependent on the counterface materials. Under testing conditions, the overall wear performance of a Cr-WC coating (Cr/W ratio of 1.12:1) deposited onto the surface of a carburized low alloy steel (0.61 wt.% C; HV = 654 ± 5) can be recommended as the best. The duplex-treated samples suffered severe, concentrated wear when against alumina. This wear is characterized by a combination of delamination, mild abrasion and oxidative wear. However, the wear mechanism seems to be oxidative and adhesive when against WC balls.

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Section: Introductionmentioning

confidence: 99%

“…It is impossible to directly measure friction and observe wear during the extrusion process, and laboratory extrusion tests can only provide indirect information regarding the friction between the billet and the die. [13] At present, the research methods of interface friction in extrusion process are divided into three categories, namely, field tests, physical simulation tests, and tribological tests. [14] Hild [15] analyzed the friction and wear phenomenon in the forward extrusion process under dry friction conditions, found that the maximum wear of the die does not occur in the area with the highest pressure, and also pointed out that no suitable wear model is currently available.…”

Section: Introductionmentioning

confidence: 99%

Effect of Interface Friction on Surface Integrity and Microstructure during Extrusion of Pure Nickel

Wang

Jia

et al. 2023

Adv Eng Mater

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The friction behavior of the billet–die interface during the pure nickel N6 extrusion process has an important decisive effect on the surface wear, microstructure control of the workpiece. Herein, field extrusion and finite element simulation are used. The influence of different interface states on the wear behavior, microstructure, and texture of pure nickel surface is realized by changing the lubrication effect between the billet and the die. The results show that the interface state has a great influence on the interface temperature and stress, which leads to different wear behaviors, microstructures, and textures of the workpiece surface. The use of lubricant reduces the shearing force of the billet–die interface, resulting in lower heat generation at the interface, and reduced uneven deformation of the billet. As a result, the surface quality of the workpiece is relatively good, but uneven lubrication is the main cause of tearing damage on the surface of the billet. The grain morphology and grain boundary distribution on the surface of the lubricating extruded bar are uniform, the microtexture strength is weak, and the Schmidt factor is large. In contrast, the opposite is true in the absence of lubrication.

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Identification of a friction model for the bearing channel of hot aluminium extrusion dies by using ball-on-disc tests

Cited by 21 publications

References 41 publications

Wear behaviour and mechanism of different metals sliding against stainless steel counterface

Wear behaviour and mechanism of different metals sliding against stainless steel counterface

A study of the wear performance of duplex treated commercial low-alloy steel against alumina and WC balls

Effect of Interface Friction on Surface Integrity and Microstructure during Extrusion of Pure Nickel

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