A105 forging

A105 of A105 forging is also a carbon steel grade of forging. A105 is also a material code, which belongs to special steel and is a cold forged steel. A105 is a low carbon steel forging, similar to 20 steel

A105 forging quality inspection items are as follows:; Die forgings with complex shape can be accurately detected by scribing method

(2) Surface quality

If there are cracks, crushing and folding defects on the surface of forgings, they can be generally found with the naked eye. Sometimes the crack is very small, and the fold is not clear, it can be observed after cleaning; If necessary, flaw detection method can be used for inspection

(3) Internal structure

Whether there are cracks, inclusions, looseness and other defects in the forging, the macroscopic structure on the forging section can be checked with naked eyes or with a 10~30 times magnifying glass. The commonly used method in production is acid etching inspection, that is, cut samples at the parts of forgings that need to be inspected, and use acid etching to clearly show the macro structure defects on the section, such as forging streamline distribution, cracks and inclusions

(4) Metallographic inspection

(5) Mechanical property

Mechanical property inspection items mainly include hardness, tensile strength and impact toughness. Sometimes cold bending test and fatigue test can be conducted according to the design requirements of parts

The above quality inspection items are sometimes used separately according to the design requirements and actual production conditions, sometimes checked piece by piece, and sometimes spot checked according to each batch of forgings. The qualification of forgings can be assessed through quality inspection. For the forgings with defects, the causes shall be analyzed and the measures to prevent defects shall be proposed