标准编号：ISO 19843:2018
中文名称：滚动轴承 陶瓷轴承球 用凹口球试验测定强度
英文名称：Rolling bearings — Ceramic bearing balls — Determination of strength by notched ball test
发布日期：2018-10
标准范围
This document specifies a method for the determination of the strength of finished ceramic balls for
ball bearings, preferably made of silicon nitride (Si3N4 ), with ball diameters from 3 mm to 50 mm.
NOTE 1 ISO 26602 specifies the requirements for preprocessed silicon nitride materials for rolling bearing
balls. ISO 3290-2 specifies requirements for finished silicon nitride balls for rolling bearings.
NOTE 2 Other test methods to determine ceramic ball strength can be found in Reference [7].
The results of the strength tests slightly depend on the Poisson's ratio. For this reason, all calculations
are restricted to a Poisson's ratio ranging from 0,15 to 0,35. This includes the Poisson's ratio of a typical
silicon nitride ceramic used as rolling element in ball bearings.
The method can also be used for rolling bearing balls made of other ceramic materials, but the reported
prefactors may not be valid.
NOTE 3 Poisson’s ratio of isotropic materials can be determined by one of the methods given in ISO 17561.
Because of the (defect controlled) brittle fracture behaviour of ceramic materials, a significant scatter
of individual results in the characterization of a series of nominally identical samples can occur.
NOTE 4 A further statistical analysis according to ISO 20501 can be carried out.
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