GB/T 18329.1-2023: Plain bearings - Metallic multilayer plain bearings - Part 1: Non-destructive ultrasonic testing of bond of thickness greater than or equal to 0.5 mm

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Scope

This document specifies the method for the ultrasonic testing of the bond defects between the
bearing alloy and the backing.
This document is applicable to metallic multilayer plain bearings with a backing made of steel
or copper-based materials and a lining made of lead or tin-based alloy, with a lining thickness
of not less than 0.5 mm. If the backing is made of cast iron, then, this document is applicable
under specific conditions.
The method confirms the bond defects by determining the ultrasonic signals reflected from the
bond between the bearing alloy and the backing.
Due to the existence of uncertain echoes, it is impossible to perform ultrasonic testing in the
area within half the range of the ultrasonic probe from the edges of the sliding surface, flange,
mating surface, oil hole and oil groove, etc. This also applies to bearings with dovetail grooves
on the bonding surfaces. This method is not suitable for the detection of bond defects in the
edge area of the dovetail grooves.
The bonding condition of the visible transition area (end surface or mating surface) between
the bearing alloy and the backing is evaluated by the non-destructive penetration method
described in GB/T 18329.3-2021.
This document only describes the pulse echo detection method in detail. The ultrasonic testing
method described in this document can only provide a qualitative evaluation of the bonding
state and cannot obtain quantitative bonding strength. The difference in echoes from ultrasonic
testing only exists between the bonding area and the bond defect.
This document only describes in detail the pulse echo evaluation method when the probe is
attached to the alloy side of the bearings. If the probe is attached to the backing side, then, the
signal processing method is similar.

Basic Data

Standard ID	GB/T 18329.1-2023 (GB/T18329.1-2023)
Description (Translated English)	Plain bearings - Metallic multilayer plain bearings - Part 1: Non-destructive ultrasonic testing of bond of thickness greater than or equal to 0.5 mm
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	J12
Classification of International Standard	21.100.10
Word Count Estimation	16,161
Date of Issue	2023-11-27
Date of Implementation	2024-06-01
Older Standard (superseded by this standard)	GB/T 18329.1-2001
Issuing agency(ies)	State Administration for Market Regulation, China National Standardization Administration