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ISO 14287:2018 pdf free

ISO 14287:2018 pdf free.Plain bearings一Pad materials for tilting pad bearings
Tin-based white metals are used as general-purpose metallic lining materials. They are generally provided with linings by casting.
White metals are characterized by good castability. However, attention should be paid to quality problems, such as bonding strength with the back metal, segregation and blow holes.
To ensure appropriate strength/softness of a white metal alloy, the combination of Sb and Cu described in Table 1 is used in many applications.
Aluminium-based bearing alloys are used for high-speed operation under high-load and high-temperature conditions. Al-Sn alloys, i.e. alloys which are made by adding tin to aluminium, are the most commonly used aluminium bearing alloys. To improve sliding characteristics at high speed,40 % Sn-Al alloy is typically used.
The pad of a bearing manufactured from such an alloy is formed from a bimetal strip consisting of an aluminium alloy, which is roll-bonded to carbon steel.
Lead-bronze bearing alloys are used under operating conditions equivalent to those for aluminium-bearing alloys or under higher load and higher temperature conditions. However, lead-bronze bearing alloys have limited uses. Lead-bronze bearing alloys are high in hardness; they normally require surface hardening (quench hardening, etc.) on the sliding surfaces of mating parts.
The pad of a bearing manufactured from such an alloy, as in the case of an aluminium bearing alloy,is typically formed from a bimetal strip. It can take the form of a copper alloy with a steel backing,although it is a rare case.
Bearings with pads having polymer layers on their sliding surfaces, which are characterized by polymer-specific tribological characteristics, are in use.
Polyether-etherketone (PEEK) and polytetrafluoro-ethylene (PTFE) polymer materials are available.
Bearings composed of such materials are provided with special measures to allow for bonding to the back metal. A porous metal layer is used as the bonding interface layer and its voids are impregnated with a polymer layer material to form a sliding surface layer. Thus, the metal interface layer is joined with the back metal. PEEK polymer materials contain some PTFE in order to improve sliding characteristics.ISO 14287 pdf download.

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