the raw material of rolling production selected
In rolling production, raw materials commonly used ingot, billets and slab, there is also the pressure of the slab.
Selection of raw materials should be noted:
(1) To consider the yield and quality.
Select the appropriate blank size, to ensure the compression ratio under the premise, to minimize the rolling passes to increase production, (large cross-section of passes needed more)
(2) To reduce the consumption, taking into account the possibility of economic and production conditions.
Preparation of raw materials mainly to check, clean the surface of various defects (scarring, cracks, slag, folding, etc.) to be cleaned before if not rolling, rolling will continue to expand, and cause more bugs.
Methods for cleaning up:
Scarfing: As carbon steel, low alloy steel, metal consumption larger
Wind shovel to clean up: for carbon steel, alloy steel, high carbon steel (alloy poor thermal performance, easy to crack by directly scarfing should be preheated.)
Wheel cleanup (planing): suitable for steel, skinning, metal consumed in large quantities.
