Device and method for testing relation between residual stress and surface hardness of metal component

Abstract

The invention discloses a device and method for testing the relation between residual stress and surface hardness of a metal component. The device comprises a testing mechanism, a residual stress simulation testing device, a hardness detection module and a monitoring device. The method comprises a method for testing the relation between residual pressure stress and the surface hardness of the metal component and a method for testing the relation between residual tensile stress and the surface hardness of the metal component. The method for testing the relation between the residual pressure stress and the surface hardness of the metal component comprises the following steps: (1) mounting and positioning a tested component; (2) carrying out simulation loading on the residual pressure stress, and acquiring simulation loading capacity of the residual pressure stress and the surface hardness; and (3) acquiring a relation curve between the residual pressure stress and the surface hardness. According to the device and the method, the relation between the residual stress and the surface hardness of the metal component is established so as to provide basis for researching the residual stress of the metal component according to the surface hardness of the metal component.

Description

technical field [0001] The invention belongs to the technical field of detection of residual stress and surface hardness of metal components, and in particular relates to a testing device and method for the relationship between residual stress and surface hardness of metal components. Background technique [0002] With the development of modern manufacturing technology, new materials and new processes are constantly emerging. Nuclear power equipment, wind power and aircraft require a long service life. Therefore, the requirements for product performance, life and reliability are getting higher and higher. Studies have shown that the residual stress of metal components plays a major role in the stress corrosion and fatigue life of important structural parts of products. [0003] Residual stress is the stress that exists inside the metal component and maintains balance within the entire component, and is divided into two types: residual compressive stress and residual tensile ...

AI Technical Summary

Problems solved by technology

Although this type of method does not damage the metal components, the equipment used in this type of method is generally more expensive and the operation is more complicated.

Therefore, but now, there is no set of special testing equipment on the market that can test the relationship between the residual stress of metal components and the surface hardness. The residual compressive stress and residual tensile stress of components provide a reference basis, and solve the problems of complex operation, low test efficiency, and low test accuracy in existing test devices for the relationship between residual stress and surface hardness of metal components.

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