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Annealing, normalizing, quenching and tempering are the four basic processes in overall heat treatment, which are called the "four fires". Among them, quenching and tempering are closely related and are often used together and are indispensable. Overall heat treatment is a metal heat treatment proce...

Non-Destructive Testing (NDT) is a method of testing the surface, internal or macrostructure of materials or components without damaging the materials or components. Among various non-destructive testing methods, PT (Penetrant Testing) is a commonly used liquid penetrant testing method.   The b...

The cast flange has accurate rough shape and size, small processing volume, and low cost, but it has casting defects (pores, cracks, inclusions); the internal structure of the casting has poor streamlines (if it is a cutting part, the streamlines are even worse);   Forged flanges generally have...