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Causes of defects in stainless steel industrial plates

Causes of defects in stainless steel industrial plates

Although stainless steel has high hardness and rust resistance, it may malfunction during use. Therefore, if there is a defect in the stainless steel industrial plate purchased by the consumer, there is no need to make a fuss. A common failure of stainless steel industrial plates is the appearance of white spots due to small cracks on the surface.

Shrinking cavity: The shrinking cavity formed when the molten steel shrinks in the mold is called the shrinking cavity. Lateral cracks: refers to the lateral cracks that occur on the surface of the stainless steel industrial plate (usually on the surface of the steel ingot), and the depth is usually shallow, which can be eliminated by fine grinding. Longitudinal cracks: refers to the longitudinal cracks on the surface of the stainless steel industrial plate, usually at the upper part and corners of the steel ingot, the upper part of the crack is very deep, and it is difficult to eliminate it by grinding.

Scarring: On the surface of the steel ingot, the splashing and adhesion of shell-like or nodular metal is called scarring, and the scarring mainly appears on the lower part of the stainless steel industrial plate. Thick skin: When the edge of the low-power test piece shows irregular dark color and looseness, a large number of oxide inclusions (mainly ferrous oxide) will gather around it, which is called overturning.

Net-like structure: The net-like protrusions that appear on the surface of the steel ingot are called net-like structures. Pits: The pits on the surface of the steel ingot are called pockmarks. Secondary pouring: traces of reconnection can be seen around the surface of the stainless steel industrial plate. Flash: The metal flakes that exist at the head or tail of the steel ingot and are perpendicular to the surface of the steel ingot are called burrs. Fins: The thin slices perpendicular to the surface of the stainless steel industrial plate are formed on the surface of the steel ingot and are called fins.

Bubbles: Bubbles are caused by molten steel degassing and poor deoxidation or wet raw materials in the molten steel injection system. Defects are usually divided into subcutaneous and internal air bubbles. Prevention method: oxidation boiling reduction deoxidation of molten steel should be good, furnace and all refractory materials in contact with molten steel should be dry, tapping troughs, prototypes, molds, etc. should be dry, stainless steel industrial plate mold rust spots should be cleaned, and the oil should be thin and even.