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GB/T 18325.2-2009: Plain bearing -- Bearing fatigue -- Part 2: Test with a cylindrical specimen of a metallic bearing material
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GB/T 18325.2-2009	English	189	Add to Cart	3 days [Need to translate]	Plain bearing -- Bearing fatigue -- Part 2: Test with a cylindrical specimen of a metallic bearing material

GB/T 18325.2-2009: Plain bearing -- Bearing fatigue -- Part 2: Test with a cylindrical specimen of a metallic bearing material

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Plain bearing Bearing fatigue Part 2. Test with a cylindrical specimen of a metallic bearing material ICS 21.100.10 J12 National Standards of People's Republic of China Sliding Bearing fatigue Part 2. Test specimens cylindrical metal bearing material (ISO 7905-2.1995, MOD) Posted 2009-05-26 2009-12-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

GB/T 18325 "sliding bearings fatigue" consists of the following four components. --- Part 1. hydrodynamic lubrication conditions in the test machine and plain bearings fatigue practical application; --- Part 2. a cylindrical metal bearing material test specimens; --- Part 3. metallic multilayer bearing material flat belt test; --- Part 4. metallic multilayer bearing material pad test. This section GB/T 18325 Part 2. The partial modification using ISO 7905-2.1995 "Sliding Bearing fatigue - Part 2. a cylindrical metal bearing material test specimens Inspection ", this section and ISO 7905-2.1995 main differences are as follows. --- The ISO 468 international standards in normative references obsolete. GB 1992 to contain its reference content/T 1031-2009. This part is proposed by China Machinery Industry Federation. Bearing this in part by the National Standardization Technical Committee (SAC/TC236) centralized. This section is responsible for drafting unit. Productivity Promotion Center in the machine. Participated in the drafting of this section. Changzhou Hengye Bearing Materials Co., Ltd. This part of the National Standardization Technical Committee Secretariat slide bearing responsible for the interpretation. This section first release. Sliding Bearing fatigue Part 2. Test specimens cylindrical metal bearing material

1 Scope

GB/T 18325 provisions of this section to determine the individual bearing material (not attached to the steel back) the fatigue limit of the method.

2 Normative references

The following documents contain provisions which, through reference GB/T 18325 in this section constitute provisions of this section. For dated reference documents Member, all subsequent amendments (not including errata content) or revisions do not apply to this section, however, encouraged to reach under this section Parties to research agreement to use the latest versions of these documents. For undated reference documents, the latest versions apply to this section. GB/T 1031-2009 Geometrical product specifications surface contour method (GPS) Surface texture roughness parameters and their values

3 Sample

The sample size should be consistent with FIG. 1 of a cylindrical shape. Millimeters Figure 1 Sample Size and Shape Bearing materials and surface roughness of the specimen shall be representative of the manufacturing process used when bearing production. Before and during the trial should be avoided Exemption sample surface mechanical damage or corrosion. The surface roughness R z should be less than 6μm (according to GB/T 1031-2009). This test side The disadvantage is that the law bearing samples along with the lack of manufacturing processes can produce residual stress and microstructure may be pressurized and the bearing steel back A thin layer on the microstructure are very different. Test Method 4 Stress cycles limit is 5 × 107 times. Finite life fatigue strength should be 107 units of stress cycles is recorded. Test frequency should be between 50Hz ~ 80Hz. In order to shorten the test time and improve the statistical estimation of fatigue life, you can use a few test Taiwan tested simultaneously. ...