GB/T 18326-2022Plain bearings - Multilayer materials for thin-walled plain bearings (English PDF)

3.3 and Appendix A of the.2001 edition);

---Change "characteristics of bearing alloy" to "hardness of bearing strip alloy layer" to clarify the object of the characteristics (see 4.4,.2001 edition

3.4);

--- The lead-based alloy material has been deleted to meet the current environmental protection requirements, and AlSn12Si2.5Pb1.7, which is no longer used, has been deleted (see

---Changed the content requirements of the chemical composition Sb in the copper-based alloy material, and changed the material name of the aluminum-based alloy material "AlSn6Cu"

method and Ni, Mn content requirements, changed the content requirements of the chemical composition Sn in AlSn20Cu, in order to meet the requirements of thin-walled sliding bearings

Market material selection requirements (see Table 2 and Table 3, Table 2 and Table 3 of the.2001 edition);

---Added the content requirements of the chemical composition Cd in tin-based alloy materials and the technical requirements of tin-based alloys, and added copper-based alloy materials

CuPb22Sn3, CuNi2Sn and CuSn8Ni, adding aluminum-based alloy materials AlSn12SiCu and AlSn6Si2.5MnNi, adding

Added the content requirement of chemical composition Pb in sintered bronze material CuSn10, sintered bronze material QFQSn8-3 and polymer material

According to the material technical requirements, the electroplating layer material SnCu3 is added, and the sputtering layer material AlSn35Cu is added to meet the thin-walled sliding

Material selection requirements for dynamic bearing market (see Table 1~Table 6).

This document is modified to adopt ISO 4383.2012 "Multilayer materials for sliding bearings and thin-walled sliding bearings".

Compared with ISO 4383.2012, this document has made the following structural adjustments.

--- The chapter "Terms and Definitions" has been added;

--- Deleted 3.1 "Chemical Composition" in ISO 4383.2012, and the relevant requirements are respectively in "4.2 Bearing Material Layer" and "4.3 Covering"

given in;

--- Added "5.1 Marking method".

The technical differences between this document and ISO 4383.2012 and their reasons are as follows.

--- Adjust the chemical composition test description of the material to "Note" (see Chapter 1) to clarify its explanatory role;

--- Deleted the ISO 6280 referenced in 3.2 of ISO 4383.2012, because the technical requirements for thick-walled multi-layer bearing backing are not suitable

For thin-walled bearings;

---Delete the backing technical requirements that are not applicable to thin-walled bearings (see 4.1), because the technical requirements for thick-walled multilayer bearings are not applicable to

thin-walled bearings;

--- ISO 6691 was replaced by GB/T 23893 (see Table 4) and GB/T 35088 was replaced by ISO 4381 (see

Table 1) to adapt to my country's technical conditions;

---Changed the material designation and Ni and Mn content requirements of the aluminum-based alloy material "AlSn6Cu", as well as the chemical composition of AlSn20Cu

Sn content requirements (see Table 3) to meet the material selection requirements of the domestic market;

--- Added copper-based alloy materials, added aluminum-based alloy materials AlSn6Si2.5MnNi, added sintered bronze materials QFQSn8-3,

The electroplating layer material SnCu3 and the sputtering layer material AlSn35Cu are added to comply with the thin-wall sliding bearing market materials

Selection requirements (see Table 2~Table 6) to meet the requirements for material selection in the domestic market.

The following editorial changes were made to this document.

---Changed the single value representation method of chemical composition content (see Table 1~Table 6);

--- Deleted the note of 3.3 in ISO 4383.2012;

--- Changed the hardness value of CuPb24Sn4, CuPb24Sn, CuPb30 in Table A.1, and increased the hardness value of CuPb17Sn5 (see

Table A.1);

--- Added bearing alloy material grades CuPb22Sn3, CuNi2Sn, CuSn8Ni, AlSn6Si2.5MnNi, and corresponding shafts

The hardness value of the alloy layer of the bearing strip (see Table A.1), the material properties, the main application in the high-speed engine and the minimum value of the matching journal material

Hardness value (see Table A.2); added coating material grades SnCu3 (electroplating) and AlSn35Cu (sputtering), and corresponding materials

Characteristics and main uses in high-speed engines (see Table A.2).

Please note that some contents of this document may refer to patents. The issuing agency of this document assumes no responsibility for identifying patents.

4.1 Steel back

The chemical composition of the steel used as the backing material shall be determined through consultation between the supplier and the purchaser, and low-carbon steel is generally used.

The bronze/polymer composites given in Table 4 can use copper-clad steel as a backing.

4.2 Layers of bearing material

The chemical composition and technical requirements of tin-based bearing alloys should meet the requirements in Table 1.