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Load capacity of lubricated bismuth bronze bimetal bearing under elliptical sliding motion

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Load capacity of lubricated bismuth bronze bimetal bearing under elliptical sliding motion. / Oksanen, V. T.; Lehtovaara, A. J.; Kallio, M. H.

In: Wear, Vol. 388-389, 2017, p. 72-80.

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@article{732778d7c4de484eb39648eb479b949f,
title = "Load capacity of lubricated bismuth bronze bimetal bearing under elliptical sliding motion",
abstract = "Leaded tin bronze alloys are widely used in heavy machinery bearings operating in boundary and mixed lubrication regions due to the excellent dry lubrication properties of lead. However, restrictions on the use of lead have created an increasing demand for lead-free or low-lead bearing materials. In the present study, suitability of a novel bismuth bronze bimetal material for possible substitution of leaded tin bronze was studied with a special thrust bearing test device, which simulates the contact conditions in the main thrust bearing of mineral crushers. The oil-lubricated test bearings have a flat-on-flat type contact with oil grooves and a constant eccentric motion against a case hardened steel counter plate under a periodically increased axial pressure. The test was continued until a sudden rise in friction, which indicates bearing failure and risk of an imminent seizure. The bismuth bronze showed a load capacity of the same level with the reference material, continuously cast CuSn10Pb10. Characterization by electron microscopy showed that the dry-lubricating bismuth precipitations had a fine grain size and an even distribution, which explains the good load carrying capacity. It was concluded that the bismuth bronze has potential for substituting the leaded tin bronzes in the studied operating conditions.",
keywords = "Bearings, Bimetals, Lead substitution, Non-ferrous metals, Solid lubricants",
author = "Oksanen, {V. T.} and Lehtovaara, {A. J.} and Kallio, {M. H.}",
year = "2017",
doi = "10.1016/j.wear.2017.05.001",
language = "English",
volume = "388-389",
pages = "72--80",
journal = "Wear",
issn = "0043-1648",
publisher = "Elsevier",

}

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TY - JOUR

T1 - Load capacity of lubricated bismuth bronze bimetal bearing under elliptical sliding motion

AU - Oksanen, V. T.

AU - Lehtovaara, A. J.

AU - Kallio, M. H.

PY - 2017

Y1 - 2017

N2 - Leaded tin bronze alloys are widely used in heavy machinery bearings operating in boundary and mixed lubrication regions due to the excellent dry lubrication properties of lead. However, restrictions on the use of lead have created an increasing demand for lead-free or low-lead bearing materials. In the present study, suitability of a novel bismuth bronze bimetal material for possible substitution of leaded tin bronze was studied with a special thrust bearing test device, which simulates the contact conditions in the main thrust bearing of mineral crushers. The oil-lubricated test bearings have a flat-on-flat type contact with oil grooves and a constant eccentric motion against a case hardened steel counter plate under a periodically increased axial pressure. The test was continued until a sudden rise in friction, which indicates bearing failure and risk of an imminent seizure. The bismuth bronze showed a load capacity of the same level with the reference material, continuously cast CuSn10Pb10. Characterization by electron microscopy showed that the dry-lubricating bismuth precipitations had a fine grain size and an even distribution, which explains the good load carrying capacity. It was concluded that the bismuth bronze has potential for substituting the leaded tin bronzes in the studied operating conditions.

AB - Leaded tin bronze alloys are widely used in heavy machinery bearings operating in boundary and mixed lubrication regions due to the excellent dry lubrication properties of lead. However, restrictions on the use of lead have created an increasing demand for lead-free or low-lead bearing materials. In the present study, suitability of a novel bismuth bronze bimetal material for possible substitution of leaded tin bronze was studied with a special thrust bearing test device, which simulates the contact conditions in the main thrust bearing of mineral crushers. The oil-lubricated test bearings have a flat-on-flat type contact with oil grooves and a constant eccentric motion against a case hardened steel counter plate under a periodically increased axial pressure. The test was continued until a sudden rise in friction, which indicates bearing failure and risk of an imminent seizure. The bismuth bronze showed a load capacity of the same level with the reference material, continuously cast CuSn10Pb10. Characterization by electron microscopy showed that the dry-lubricating bismuth precipitations had a fine grain size and an even distribution, which explains the good load carrying capacity. It was concluded that the bismuth bronze has potential for substituting the leaded tin bronzes in the studied operating conditions.

KW - Bearings

KW - Bimetals

KW - Lead substitution

KW - Non-ferrous metals

KW - Solid lubricants

U2 - 10.1016/j.wear.2017.05.001

DO - 10.1016/j.wear.2017.05.001

M3 - Article

VL - 388-389

SP - 72

EP - 80

JO - Wear

JF - Wear

SN - 0043-1648

ER -