Stainless steel precision casting process

In stainless steel precision casting, the use of high-frequency welding is to use the skin effect and proximity effect to form an electromagnetic induction loop at the opening, thereby generating a concentrated and powerful thermal effect, so that the edge of the weld is quickly heated to the temperature required for welding, and then After the metal becomes molten, it is squeezed to realize the bonding between the crystals. Finally, through cooling, a firm butt weld is formed.


There are many processes in stainless steel precision casting, and the main processes are:


Mold making → smelting → pouring → vibrating shell → cutting → rough grinding → pickling → hoisting polishing → fine spraying → solid solution → hoisting polishing → shaping → passivation → pickling → final inspection and storage


Melting: The temperature is 1600°C.


Pickling: Its purpose is to remove oxide scale. The pickling temperature is 50°C-60°C and the time is 20 to 30 minutes.


Fine blasting: mainly used in some places where polishing is inconvenient, using sand blasting.


Solid solution: The purpose is to obtain a single-phase austenite structure, the temperature is 1080 ℃, and the time is more than 30 seconds.


Passivation: The purpose is to obtain a protective film on the surface of the casting.