There are two types of inspection in Casting
1. Destructive Inspection: In this casting, the workpiece is destroyed to check it various mechanical properties, chemical composition, defects in casting.
2. No Destructive Casting: This one is used to check the defects in the casting without damaging or destroying the workpiece. Here are some methods used in Non Destructive casting
? Dimensional Inspection : In this after casting is done standard tool are used to check the dimensions of the casting workpiece. Various tools like vernier calliper, Go - NoGo gauge, template gauge are used to do this inspection.
? Visual Inspection: In this, a person simply looks at the workpiece and check for the surface defects, cracks,misrun , wrapping etc.This is most common that is used in inspection.
? Pressure Testing: This kind of testing is done to check the leakage or impermeability of metal.Casting product like tubes , cylinder go into this kind of testing to see is there any leakage somwhere. Normally a solution of soap and water is used if the bubble arises anywhere on workpiece it means leakage is there.
? Radio - graphical Testing : This kind of testing is done to check cracks , internal voids, cavities etc. This testing is normally done by X-rays and γ rays (these rays can penetrate deep into the workpiece)
X- ray are used for casting thickness 50mm to 180mm
γ rays are used for heavy walled casting.Note : γ rays can penetrate very deep as compare to X- rays
? Magnetic Testing: This testing is done to check cracks slightly below the surface of the casting. This kind of testing can detect small crack that Radio - graphical testing can't detect sometimes (Only for ferro-magnetic materials).
? Eddy Current Inspection: In this method high current frequency is passed through the workpeice that induced magnetic field. If there is any crack or leakage in the material magnetic field magnitude changes and detect by the instrument .
(can use ferro-magnetic as well as some non-ferromagnetic process)
ABOUT KEVA
Keva Casting is a professional casting company that focuses on Construction, Machinery, Automobile, Hardware, Pipeline and many other industries.
We provide top quality products with the best service based on our complete production chain including our own mold design, advanced production techniques, and full management of the supply chain. Keva Casting has two factories located in Zhucheng, China's Shandong province.
We use "shell molding", which is a new technique that has been developed in recent years.This new technique has simplified production procedures and reduced air pollution compared with traditional sand casting and investment casting. Shell making and core making are faster to ensure production in enormous quantities. The dimensions and surface finishing are satisfactory for all kinds of industrial requirements. Besides supplying our own formwork & scaffolding systems, our casting products also supply OEM services in various industries.