GB/T 18326-2022 in English

Standard Background and Significance

GB/T18326-2022 "Multilayer Materials for Thin-walled Sliding Bearings" is an important revision that replaces GB/T18326-2001. It mainly updates the technical requirements for multilayer materials for thin-walled sliding bearings. This revision introduces stricter chemical composition specifications and environmental protection requirements, and adds a number of technical standards for new alloy materials to meet the higher requirements of modern engines and high-speed machinery for bearing material performance.

This standard revision adopts ISO4383:2012, combines the actual needs of the Chinese market, adds a new "Terms and Definitions" chapter, and optimizes and adjusts the original technical requirements. In particular, the lead-based alloy materials that do not meet environmental protection requirements have been deleted, reflecting the concept of sustainable development in the industry.

Implementation recommendations and technical selection guide

Material selection principles:

• Select an alloy layer with appropriate hardness according to the working conditions of the bearing (refer to Table A.1 and Table A.2)
• Give priority to environmentally friendly materials and avoid the use of lead-containing alloys
• Match the bearing alloy layer with the minimum hardness requirement of the journal material

Coating technology recommendations:

• Electroplating is suitable for small and medium-sized batch production
• Sputtering coating is suitable for high-precision parts
• Polymer coating needs to be selected in combination with specific lubrication conditions