GB/T 33949-2017 in English

Interpretation of the National Standard of the People's Republic of China GB/T 33949—2017

1. Background and significance of the formulation of the standard

GB/T 33949—2017 "Copper alloy ring materials for bearing cages" is to standardize the technical requirements of copper alloy ring materials used in the bearing industry and ensure their performance and quality in bearing manufacturing. With the continuous development of bearing technology, the requirements for materials are getting higher and higher. The formulation of this standard fills the gap in related fields in China and provides an important basis for the quality control of copper alloy ring materials for bearing cages.

2. Comparative analysis of standard frameworks

3. Interpretation of the core content of the standard

3.1 Brand and state management

The standard specifies a variety of brands of copper alloy materials, including HPb59-1, HMn64-8-5-1.5, etc., and clarifies their corresponding states (such as centrifugal casting, hot extrusion, etc.). The selection of these brands directly affects the performance and service life of the bearing cage.

3.2 Chemical composition requirements

3.3 Mechanical properties and process requirements

The standard sets strict requirements for the mechanical properties of ring materials, including tensile strength, elongation after fracture and Brinell hardness. These indicators are determined based on the needs in actual applications to ensure the reliability of bearing cages under various working conditions.

4. Implementation suggestions and precautions

4.1 Precautions when selecting materials

• Select the appropriate grade and state according to the specific application scenario.
• Pay attention to the fluctuation range of chemical composition to ensure that it meets the requirements of the standard.
• Give priority to products from certified suppliers.

4.2 Implementation suggestions for test methods

When conducting chemical composition analysis and mechanical property tests, the test methods specified in the standard should be strictly followed to ensure the accuracy and comparability of the data. For arbitration inspection, the methods specified in the national standard should be used first.

5. Conclusion

GB/T 33949-2017 standard provides scientific basis and technical support for the production and application of copper alloy ring materials for bearing cages. With the development of the bearing industry, new materials and processes may appear in the future, and the standard will be continuously revised and improved to adapt to new technical requirements.