Sheyang county Tengda flaw Detection Machine factory
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Sheyang County, Jiangsu Province Tengda flaw Detection machine factory

Phone: 0515-82385718

Fax: 0515-82331542


Add: Jiangsu Sheyang Economic Development Zone (west)

Contact Person: Mr. Zhu

Phone: 13004587009



How to detect forged steel parts by fluorescent magnetic particle flaw detector?

Fluorescent Magnetic PowderHow to detect forged steel parts by a flaw detection machine

Forged steel parts are forged or extruded by heating the steel. Forging process can save steel, high production efficiency, forged steel pieces of material dense, high strength, so in the production of mechanical parts to occupy a certain proportion. Due to the many processing procedures of forged steel parts, it is easy to produce different defects in production, which requires us to pick out the unqualified products of forged steel parts in manufacturing process, to ensure the quality of forged steel parts.

(1) Characteristics of fluorescent magnetic particle flaw detection for forged steel parts

Forging process molding method is divided into two forms of forging and die forging, and its process is generally composed of the following processes:

Blanking--heating--forging--flaw detection--heat treatment--flaw detection--mechanical processing--surface heat treatment--mechanical processing a final flaw--finished product.

From the above process line, the source of the defects of forged steel parts can be summed up in the following aspects:

① forging process defects include poor raw materials (including slag, pores, inclusions, porosity, shrinkage, etc.), the cutting and forging process is improper and unreasonable mold design and other causes of the cracks, folding, white spots and hair lines and other defects. So we need a magnetic particle flaw detector to detect

Due to the improper heat treatment process, the thermal stress concentration caused by the change of the workpiece abnormity size and the quenching cracks caused by the defects of the material forging in the heat treatment, the defects caused by the ② heat treatment process are improved when the forging strength eliminates the forged stress and heat treatment.

The defects in the process of ③ machining include grinding crack, correcting crack and so on.

The defects of ④ surface heat treatment process include crack caused by improper process and quenching crack caused by uneven thermal stress in groove and other parts.

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