Why steel must do metallurgical analysis test

Metallographic analysis is an important method to study the microstructure of metal materials, steel for metallographic analysis has its necessity and many advantages, the following is the relevant introduction:

Reason

The performance of steel not only depends on its chemical composition, but also is closely related to the internal metallographic organization. Through metallographic analysis, the organizational structure of steel can be understood, such as grain size, phase composition, inclusions, and so on., so as to assess the quality and performance of steel and the reasonableness of the processing technology.

Vantaggi

– Evaluating material properties: It can directly observe the internal microstructure of steel, accurately determine its strength, toughness, hardness and other properties, and provide a basis for material selection and quality control.

– Monitoring processing technology: It can analyze the changes in the organization and structure of steel during rolling, forging, heat treatment and other processing processes, which helps to optimize the processing technology and improve production efficiency and product quality.

– Failure analysis: When steel fails or malfunctions, metallographic analysis can help to find out the reasons, such as whether the performance is degraded due to overheating, overcooling, or uneven organization.

Usage Scenarios

– Manufacturing: Steel mills are used to control the quality of steel and ensure that the products meet the standard requirements; machinery manufacturers are used to select the right steel and formulate the processing technology.

– Quality inspection: In the fields of construction, bridge, automobile, aerospace, and so on., metallographic analysis of steel is carried out to ensure the safety and reliability of the structure.

– Scientific research and teaching: It is used to study the relationship between the organization structure and performance of steel, to provide theoretical support for the development and research of new materials, and is also an important means for students of related professions to learn the microstructure of materials.

Analysis of common problems

– Uneven organization: It may lead to inconsistent performance of steel, local problems such as lack of strength or poor toughness, which may be due to uneven quality of raw materials, uneven heating or cooling.

– Coarse grain: will make the steel toughness and fatigue properties are reduced, usually

Example：This is by unprofessional factories to provide unqualified raw materials lead to tee in the welding process cracking, by doing metallurgical analysis can be viewed to the chemical composition does not meet the mechanical properties of unqualified. Although it is a seamless tee without any weld, but still cracked, causing huge losses to the chemical plant!