What are the causes of peeling defects?
A: Inclusions in the cast billet, subcutaneous bubbles, and incomplete descaling during hot rolling; strictly control the purity of the cast billet and optimize hot rolling descaling.
What is the control range for surface roughness Ra?
A: Ordinary Ra 0.4-0.8μm, mirror finish Ra≤0.2μm; adjusted by roll roughness and rolling pressure.
What is the choice between oiled and oilless?
A: Oiling (rust-preventive oil/stamping oil) prevents rust and facilitates stamping; oilless is used for electroplating and requires degreasing before painting.
How is the formability of 1010 cold-rolled steel?
A: Excellent, elongation ≥35%, suitable for deep drawing, stretching, bending, and cold heading; can be made into complex shapes.
Minimum bending radius?
A: Soft state 0.5-1.0t (t = thickness), semi-hard state 1.0-2.0t, fully hard state 2.0-3.0t.