GB/T 18329.2-2023 Plain bearings - Metallic multilayer plain bearings - Part 2: Destructive testing of bond for bearing metal layer thicknesses greater than or equal to 2 mm
1 Scope
This document specifies a tensile test method for determination of the bond strength between the bearing metal and the backing. The test can be applied to multilayer plain bearings with bearing metals based on lead, tin, copper or aluminium. For tested layer thicknesses ≥ 2 mm, a raw lining thickness of a minimum additional 1 mm is necessary.
The backings are from steel, cast steel or copper alloys. The bond strength test does not apply to bearings with cast iron backing.
The test applies to all thrust bearings and to journal bearings with an inner diameter of backing ≥ 90 mm.
The test can be used for comparative investigations into the influence on the bond strength of various processes and types of material. In addition, the test is suitable for production control and for process qualification of bearing production.
For non-destructive ultrasonic testing of the bond between bearing metal and backing for bearing metal layer thicknesses ≥ 2 mm, see ISO 4386-1.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
No terms and definitions are listed in this document.
4 Principle
During the tensile testing carried out vertically to the bond surface, the bond strength, RCh, in newtons per square millimetre, is the quotient of the maximum force, Fmax , in newtons and the bond surface, A, in square millimetres, of the specimen (see Table 2), as given by Formula (1).
Note: The subscript "Ch" refers to the test method proposed by Chalmers.
