What is the standard elongation of SPCC sheets?
A: Generally, the elongation is ≥34%, but the specific value may fluctuate slightly depending on the heat treatment conditions. If the elongation is low during hot rolling, it will also be affected after cold rolling and annealing.
What to do if necking occurs during deep drawing of SPCC sheets?
A: Adjust the deep drawing process parameters, reduce the deep drawing speed, optimize the blank holder force, and avoid excessive local thinning; check if the die is smooth, increase lubrication to reduce local stress concentration caused by friction.
What are the corresponding European and American grades for SPCC sheets?
A: The European standard corresponds to DC01, and the American standard corresponds to grades 1008 or 1010.
What treatment is required before surface coating of SPCC sheets?
A: First, remove surface oil, rust, and impurities, which can be done through pickling, phosphating, etc.; then perform surface grinding to improve coating adhesion; finally, ensure the surface is dry and clean.
How to correct the unevenness of SPCC sheets? A: A leveling machine can be used for secondary leveling; for uneven areas, a special leveling tool can be used for manual correction; during mass production, the leveling process parameters after rolling can be optimized.