With the increasing development of modern industry, the use of the product performance requirements are higher.
 
Forgings, quality control and inspection of it during the forging process has also taken stringent measures to prevent forging defects and improve forging quality necessary for. Due to the complexity of the reasons causing the problem of forging quality, determine the diversity of analytical methods; the forging on the importance of mechanical products, but also determines the strict demands high standards of metallurgical quality of the forging. Especially in some forging defects may lead to the deterioration of the material properties of the metallurgical quality of internal diseases, hidden deep, harm, in the control of the quality of forging metallurgy, in addition to conventional spectral analysis of the chemical, macro and micro analysis method still in use, the new detection methods and equipment with fast, accurate and automated features.

Forging quality analysis methods vary depending on the type of defects in focus. Forging itself quality problems are generally related to the heating and deformation. Therefore, the surface defects - cracks, folding, etc., all oxide scale exists, and its internal defects and substandard performance are related to the thermodynamic factor in the forging process. This determines its analytical methods, mainly in low magnification test, metallographic test and metal deformation flow analysis test. This will need to be analyzed defects forging anatomy, sampling and analysis from the defect, it is also known as a destructive test. Low magnification test may be exposed to the macroscopic defects, such tests of forgings including sulfur print test, hot corrosion and cold eclipse acid leaching test, fracture test.
 
The microscopic characteristics of high-powered organization for research and analysis of defects in the formation mechanism of significance. Metal deformation flow analysis test of special significance to the analysis of cracks, folding and the formation of coarse-grained distribution of flow lines and flow through. During forging quality analysis, it is often the low-fold test, metallurgical testing and metal deformation flow analysis test to combine at the same time, it was possible to the nature of the defect causes a more complete understanding. Low magnification test or trial of high-powered organization, must be based on the specified test methods.



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