A pin on disc study of the tribology characteristics of sintered versus standard gear materials

• Powder metallurgy allows complex component geometries which includes gears. There is however a lack of knowledge of the tribological performance of powder material gears compared to gears manufactured from standard gear materials. In this study, a pin on disc machine was used to simulate the sliding part of gear tooth contact both in boundary and mixed lubricated regions. A comparative study of the tribology characteristics of two kind of sintered gear materials with a standard gear material was performed. The comparison comprised of damage mechanisms, wear, friction and running-in between these materials in different pin on disc configuration (standard vs standard, sintered versus sintered and sintered versus standard). For the same gear materials combinations [RS-RS (16MnCr5), AQ-AQ (Distaloy AQ+0.2%C) and Mo-Mo (Astaloy 85Mo+0.2%C)], RS gear material has a lower friction coefficient. When it comes to PM and RS material combinations, both of the PM materials showed a lower friction coefficient, when the pins are made of PM materials in contrast if we have RS pin. Also for the wear rate, RS material always shows the lowest wear rate no matter the disc material. AQ and Mo gear materials have nearly the same wear rate. A distinct difference between different material combinations, both in friction and in wear rate, is observed during the running-in phase.

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Maskinteknik -- Tribologi (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Mechanical Engineering -- Tribology (hsv//eng)

Nyckelord

Gear material

PM

wear

friction

running-in

Publikations- och innehållstyp

pop (ämneskategori)

kon (ämneskategori)