GB/T 33210-2025Non-destructive testing — Test method for determining residual stresses based on inverse magnetostrictive effect (English PDF)

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1: Structure and drafting rules for standardization documents" Drafting.

This document replaces GB/T 33210-2016 "Electromagnetic testing method for non-destructive testing of residual stresses" and is consistent with GB/T 33210-2016.

In addition to structural adjustments and editorial changes, the main technical changes are as follows.

— Changed the scope (see Chapter 1, Chapter 1 of the 2016 edition);

— Added terms and definitions for sensitivity, extreme and shear stress difference methods (see 3.1, 3.2 and 3.3);

— Added detection principle (see Chapter 4);

— Added safety requirements (see Chapter 5);

— Deleted personnel qualifications (see Chapter 4 of the 2016 edition);

— Added general testing process regulations (see Chapter 6);

— Changed the detection system (see Chapter 7, Chapter 6 of the 2016 edition);

— Changed the test procedure (see Chapter 8, Chapter 7 of the 2016 edition);

— Changed the test records and reports (see Chapter 9, Chapter 8 of the 2016 edition).

Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents.

This document is proposed and coordinated by the National Technical Committee for Standardization of Non-destructive Testing (SAC/TC56).

This document was drafted by: China Special Equipment Testing and Research Institute, Shanghai Materials Research Institute Co., Ltd., Guangdong Special Equipment Testing and Research Institute Foshan Testing Institute of the Institute, China University of Mining and Technology, Ningxia University, and Star Intelligent Testing Systems (Suzhou) Co., Ltd.

The main drafters of this document are: Ding Keqin, Jiang Jiansheng, Xin Wei, Deng Bo, Wang Zhijie, Yin Chunhao, Shi Pengpeng, Ding Jie, Liu Haishun, Chen Li, Zhao Na, Chen Guang, Wang Wenshuai, Li Na, Zhang Lijing, Wei Ming, Cheng Yayu, Li Jiashun, Wu Zhihang, and Han Lina.

This document was first published in 2016 and this is the first revision.

Nondestructive testing of residual Stress detection method

1 Scope

This document describes a method for detecting residual stress on the surface of ferromagnetic materials based on the inverse magnetostrictive effect.

This document is applicable to the surface residual stress detection of ferromagnetic structural parts (such as ferromagnetic structures in special equipment, transportation, energy and other fields). member).

2 Normative references

GB/T 12604.6

GB/T 20737

3 Terms and Definitions

The terms and definitions defined in GB/T 12604.6 and GB/T 20737 and the following apply to this document.

4 Detection Principle

When residual stress exists inside ferromagnetic materials, the residual stress will produce magnetic characteristics (performance) in the structural parts due to the inverse magnetostrictive effect.

The residual stress in the structural parts can be detected by measuring the surface magnetic induction signal.

The residual stress detection principle of the expansion and contraction effect is shown in Figure 1.