GB/T 5166-2023Determination of elasticity modulus for sintered metal materials and hardmetals (English PDF)

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents" Drafting.

This document replaces GB/T 5166-1998 "Determination of elastic modulus of sintered metal materials and cemented carbide" and is consistent with GB/T 5166-1998 In addition to structural adjustments and editorial changes, the main technical changes are as follows.

a) Added terms and definitions (see Chapter 3);

b) The principle has been changed (see Chapter 4, Chapter 3 of the 1998 edition);

c) The sampling method has been changed (see 5.1, 4.1 of the 1998 edition);

d) Delete "the thickness of the surface layer should be removed at least 0.1mm" (see 4.3 of the 1998 edition);

e) Added "Vernier caliper" (see 6.1);

f) Added "instrument resolution not greater than 1Hz" (see 6.4);

g) Added the sample density determination method for permeable sintered metal materials of sintered metal materials (excluding cemented carbide) (see 7.2);

h) The rules for rounding off reporting results have been changed (see 8.2, 7.2 of the 1998 version).

1 Scope

This document describes methods for the determination of the elastic modulus of sintered metallic materials and cemented carbide.

This document is applicable to the determination of the dynamic (adiabatic) elastic modulus of sintered metallic materials and cemented carbide using the longitudinal vibration method.

2 Normative reference documents

The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, the dated quotations For undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to this document.

GB/T 3850 Density determination method of dense sintered metal materials and cemented carbide

GB/T 5163 Sintered metal materials (excluding cemented carbide) Density, oil content and porosity of permeable sintered metal materials Determination

GB/T 5242 Inspection rules and test methods for cemented carbide products

GB/T 8170 Numerical rounding rules and expression and determination of limit values

GB/T 10623-2008 Terminology for mechanical properties testing of metal materials

GB/T 22315-2008 Test method for elastic modulus and Poisson's ratio of metallic materials

JB/T 7905 Sintered metal materials (excluding cemented carbide) Sampling

3 Terms and definitions

The following terms and definitions as defined in GB/T 10623-2008 and GB/T 22315-2008 apply to this document.

4 Principles

By subjecting the sample to longitudinal vibration excitation by acoustic waves, the sample is caused to vibrate mechanically. When the resonant frequency of the sample is the same as the excitation frequency, the sample is vibrated mechanically.

Resonance occurs. The elastic modulus can be calculated by measuring the resonant frequency, length and density of the sample.