GB/T 44751-2024 Active National standards

GB/T 44751-2024 Fine ceramics—Silicon nitride materials for rolling bearing balls and rollers

Publish Date: 2024-10-26 Implement Date: 2025-05-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: GB/T 44751-2024

Standard Type: National standards

Standard Status: Active

is_force_gb: no

CCS Name: Special ceramics

ICS Name: High-end ceramics

Publish Date: 2024-10-26

Implement Date: 2025-05-01

Pages: 10 pages

Scope

This document specifies the requirements for silicon nitride materials used in rolling bearing balls and rollers.
This document defines the physical and mechanical properties of silicon nitride materials used in rolling bearing balls and rollers. According to the material characteristics and microstructure, they are divided into three grades. Appendix C provides methods for sample preparation and microstructure analysis.
This document is applicable to processed rolling bearing balls and rollers.

Development Information

Word Count: 15 Thousand words Pages: 10 pages

Referenced Standards

GB/T 6569-1986 Testing method for flexural strength of high performance ceramics GB/T 6569-2006 Fine ceramics(advanced ceramics,advanced technical ceramics)—Test method for flexural strength of monolithic ceramics at room temperature GB/T 16534-1996 Test method for Vickers hardness of high performance ceramics GB/T 16534-2009 Fine ceramics(advanced ceramics,advanced technical ceramics)—Test method for hardness of monolithic ceramics at room temperature GB/T 16535-1996 Test method for linear thermal expansion of high performance ceramics GB/T 16535-2008 Fine ceramics(advanced ceramics,advanced technical ceramics)—Test method for linear thermal expansion of monolithic ceramics by push-rod technique GB/T 17991-1999 Definitions of terms relating to industrial ceramics GB/T 17991-2009 Fine ceramics(advanced ceramics,advanced technical ceramics)—Vocabulary GB/T 25995-2010 Test methods for density and apparent porosity of fine ceramics GB/T 40005-2021 Weibull statistics for strength data of fine ceramics GB/T 41605-2022 Silicon nitride materials for rolling bearing balls—Test method for fracture resistance at room temperature—Indentation fracture (IF) method JC/T 2172-2013 The test methods for the elastic modulus, shear modulus, and Poisson's ratio of fine ceramics - Impulse excitation method

Adopt standards

ISO 26602:2017

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