Defects In Steel Sheets

Surface defects surface defects is an important issue in sheet metal stamping as the stamping process affects surface appearance and thus influences surface quality.

Defects in steel sheets.

They can be caused by carbon smut or grease deposits on the strip being coated or by roll pickup of foreign material. Bare spots galvanized coated bare spots result when coating fails to adhere leaving the substrate exposed. The shape defect of the steel coil is higher or lower than the one end of the coil and is continuous like a pagoda which appears in the inner outer ring portion of the coil. Defects in continuous cast steel products.

The annealed steel sheet surface exhibits an irregular or island like black brown pattern. The weight doesn t change. Choosing the wrong size blank under estimating the number of forming tools required or encountering an unexpected wrinkle or split can be very costly if only discovered during first physical tool tryout. Here are some common flat roll steel defects we watch out for.

A great amount of time is therefore spent during the product development process on the optimization of surface defects particularly surface lows during tryout. It isn t practical to handle this when it s flat so it is coiled as it s produced. This means the length of your sheet metal can be over a mile long.