X-ray NDT technology helps die-casting enterprises achieve automation and intelligent testing needs

Introduction: Casting is an important basic industry in the national industry. With the rapid development of science and technology, the casting industry is facing more and more difficulties. Increasing the efficiency of casting production, product quality, reducing energy consumption, and reducing waste have never been so urgent.

X-ray NDT technology helps die-casting Industry:

Due to the complicated casting process, the raw material control is not strict in the production process, the production process is not perfect, the mold structure is unreasonable, and the production operation is improper, which will cause various defects in the casting. Common defects include cracks, bubbles/pores, loose and inclusions. In order to ensure the quality of castings and save costs, it is necessary to detect defects in time in the early stages of the production process. X-ray nondestructive testing has become the preferred method for casting defect detection due to its low detection cost, high detection efficiency, wide application conditions, and clear and intuitive images.

Defect 1: Crack

During the casting process, due to the structure of the casting or the casting process, the solidification speed is different everywhere, and then the stress is generated. This stress cracks the casting in the middle and late stages of the solidification process of the casting, corresponding to the formation of hot cracks and cold cracks. The crack is in the form of a light line in the X-ray detection image.

Cast X-ray inspection chart Crack

Defect 2: Bubble / stomata

Mainly due to the exhausting of the casting during the casting process; mold surface processing, coating, cleaning problems; improper casting process or improper operation can easily cause pores and bubbles on the surface and inside of the casting. The bubbles/pores on the surface of the workpiece can be found by sandblasting and visual inspection, and the bubbles/pores inside the workpiece can be found by X-ray fluoroscopy.

Cast X-ray inspection chart Bubble stomata

Defect 3: Loose

There are many reasons for the shrinkage of the castings. The fundamental reason is that the castings are blocked during the cooling process and the crystal structure is coarse. The shrinkage defect has a great influence on the mechanical properties of the casting, and because it has a wide distribution surface, it is difficult to find and difficult to shrink, which is one of the most dangerous defects of the casting. This defect can be found by means of X-ray fluoroscopy, which is severely filamentous in the X-ray image, and generally has a light cloud.

Cast X ray testing chart Loose

Defect 4: inclusion

Mainly due to the uncleanness of the charge or the improper slag inclusion due to improper operation, it is distributed on the upper surface of the casting and the corner portion where the inner corner of the casting is not ventilated. The general detection method of casting inclusions is difficult to find, and it is difficult to quantify them. This defect can be easily found by X-ray fluoroscopy, which is dark dots or blocks in the X-ray image.

Cast X-ray detector chart inclusion

X-ray NDT technology helps die-casting solve these problems: Crack, Bubble / stomata, Loose, inclusion and so on.

As companies strive to improve production efficiency, improve product quality; pursue intelligent, unmanned production lines. Zhuomao/ Seamark ZM is market-oriented, customer-oriented, pioneering and innovative, and unremitting efforts to successfully develop online automatic X-ray intelligent testing equipment to solve many problems of enterprises. The online automatic X-ray intelligent detection equipment has a series of automatic operations such as production and detection, (defect) discovery, identification, judgment and sorting. It satisfies the testing efficiency of the production enterprises, solves the problem of rising labor costs of the enterprise, and realizes the automation and intelligence of the factory.

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