Standard No.:	GB/T 27553.2-2011
English Name:	Specification of plastics-bronze-steel backing triplelayer self-lubricating materials—Part 2:Plastic overlay with modified POM
Chinese Name:	塑料-青铜-钢背三层复合自润滑板材技术条件 第2部分:带改性聚甲醛（POM）减摩层的板材
Chinese Classification:	J12    Sliding bearing
Professional Classification:	GB    National Standard
ICS Classification:	21.100.10 21.100.10    Plain bearings 21.100.10
Source Content Issued by:	AQSIQ; SAC
Issued on:	2011-11-21
Implemented on:	2012-6-1
Status:	valid
Target Language:	English
File Format:	PDF
Word Count:	6000 words
Translation Price(USD):	180.0
Delivery:	via email in 1 business day

Specification of plastics-bronze-steel backing triplelayer self-lubricating materials - Part 2: Plastic overlay with modified POM 1 Scope This part of GB/T 27553 specifies the structural characteristics, technical requirements and test methods of plastics(modified POM)-bronze-steel backing triplelayer self-lubricating materials. This part of GB/T 27553 is applicable to the plastics(modified POM)-bronze-steel backing triplelayer self-lubricating materials (hereinafter referred to as "plastic overlays"), which can be post-processed into wrapped bushes, thrust washers, sliders, guide rails and other forms of products. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. GB/T 223.69 Iron, steel and alloy - Determination of carbon contents - Gas-volumetric method after combustion in the pipe furnace GB/T 231.1 Metallic materials - Brinell hardness test - Part 1: Test method (GB/T 231.1-2009, ISO 6506-1:2005, MOD) GB/T 3960 Plastics - Test method for friction and wear by sliding GB/T 5121.2 Methods for chemical analysis of copper and copper alloys - Part 2: Determination of phosphorus content (GB/T 5121.2-2008, ISO 4741:1984, MOD) GB/T 5121.10 Methods for chemical analysis of copper and copper alloys - Part 10: Determination of tin content (GB/T 5121.10-2008, ISO 3111:1975, MOD) GB/T 5121.11 Methods for chemical analysis of copper and copper alloys - Part 11: Determination of zinc content (GB/T 5121.11-2008, ISO 4740:1985, MOD) GB/T 6462 Metallic and oxide coatings - Measurement of coating thickness - Microscopical method (GB/T 6462-2005, ISO 1463:2003, IDT) GB/T 12613.3 Plain bearings - Wrapped bushes - Part 3: Lubrication holes, grooves and indentations   3 Structural characteristics 3.1 Structure of plastic overlay The plastic overlay is composed of three layers: surface plastic layer, intermediate sintered layer and steel backing layer. The structure is shown in Figure 1.

Foreword II 1 Scope 2 Normative references 3 Structural characteristics 4 Technical requirements 5 Test methods