GB/T 35088-2018Plain bearings -- Tin casting alloys for multilayer plain bearings (English PDF)

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009.

This standard uses the translation method equivalent to ISO 4381.2011 "Silicon cast alloy for sliding bearing multi-layer sliding bearings".

This standard has made the following editorial changes.

--- Added the scope of Chapter 1 "Note. In addition to the materials specified in this standard, the chemical composition and technical requirements of other grades of tin-based casting alloys

See Appendix A. "

This standard was proposed by the China Machinery Industry Federation.

This standard is under the jurisdiction of the National Sliding Bearing Standardization Technical Committee (SAC/TC236).

This standard is drafted by. China National Machinery Productivity Promotion Center, Hefei Bolin New Materials Co., Ltd., Changzhou Hengye Bearing Materials

Limited company.

Participated in the drafting of this standard. Hunan Chongde Industrial Technology Co., Ltd., Linan Oriental Sliding Bearing Co., Ltd., Shanghai Nuclear Power Industry Co., Ltd.

Limited company, Jinhua Chengkai Alloy Materials Co., Ltd., Hunan UFO New Materials Co., Ltd.

This standard is interpreted by the National Standardization Technical Committee for Plain Bearings.

Sliding bearing

Tin-based casting alloy for multi-layer sliding bearings

1 Scope

This standard specifies the technical requirements for tin-based cast bearing alloys for multi-layer plain bearings. Chemical composition and material properties refer to raw materials

Raw materials should be tested using representative samples. Due to the influence of bearing manufacturing, the test results of finished bearings may be related to the detection of raw materials.

Inconsistent. Therefore, the test results of finished bearings should not be used as the basis for determining the material performance indicators.

Note. In addition to the materials specified in this standard, the chemical composition and technical requirements of other grades of tin-based casting alloys are given in Appendix A.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article.

Pieces. For undated references, the latest edition (including all amendments) applies to this document.

ISO 1143 Metallic material slewing beam bending fatigue test (Metalicmaterials-Rotatingbarbendingfatigue

Testing)

ISO 4384-2 Plain bearings bearing alloys - Determination of hardness - Part 2. Single layer materials (Plainbearings-Hardnesstes-

Tingofbearingmetals-Part 2. Solidmaterials)

Plain bearings - Multilayer plain bearings with sliding bearings - Part 2. Bearing alloys with a thickness greater than or equal to 2 mm

Non-destructive testing of layer bond strength (Plainbearings-Metalicmultilayerplainbearings-Part 2. Destructive

Testingofbondforbearingmetallayerthicknessesgreaterthanorequalto2mm)

3 requirements

100 ° C 10

0.2% tensile yield stress Rp0.2

N/mm2

20°C 46

Tensile strength Rm

N/mm2

20°C 77

0.2% compression yield stress sigmad0.2

N/mm2

20°C 47

100°C 27

Bond strength RCh

N/mm2

See 8.1 and 8.2 in ISO 4386-2.2012

Rotary beam bending fatigue Rrbf

According to ISO 1143, 107 cycles

N/mm2

+/-29

Linear thermal expansion coefficient alpha

10-6/K

23.9

Melting temperature

233~360

Casting temperature

440~460

Density rho

Kg/dm3

7.3

4 mark

Example. The bearing alloy with the chemical composition code SnSb8Cu4 is marked as follows.

Bearing alloy GB/T 35088-SnSb8Cu4

Appendix A

(informative appendix)

Guide to bearing alloy applications and bearing pair (shaft) hardness

Bearing alloy characteristics and the minimum hardness of the main purpose shaft a

SnSb8Cu4

Good slidability, compliance and high toughness; good embedding; suitable for hydrodynamic pressure

High sliding speed, medium load in the range; low frequency impact stress; no alternating bending stress

sensitive.

Suitable for high load rolling mill bearings; for the manufacture of rolled bushings up to 3 mm left

Right thin wall bearing bush and thrust washer

160HBW

a In multi-layer plain bearings, the difference between the bearing material and the shaft material hardness should be safe to avoid seizure under working conditions. Working conditions,

In particular, the lubrication conditions have a considerable influence on the selection of the shaft material. Therefore, the recommended shaft material hardness value is the minimum value. Usually, tin-based bearings

The material is used to match un-quenched and untempered shafts.

references

[1] ISO 4386-1 Plainbearings-Metalicmultilayerplainbearings-Part 1. Non-destructrive

Ultrasonictestingofbond

[2] ISO 4386-3 Plainbearings-Metalicmultilayerplainbearings-Part 3. Non-destructive

Penetranttesting

OSI/

8102-

T/

......