Төмөр төмөр ба ган баарны гадаргуугийн нийтлэг …
ContentsCommon surface defects of wire rod and steel barHow to deal with defective products Common surface defects of wire rod and steel bar 1.1 defects of raw materials 1.1.1 shrinkage cavity – residual shrinkage cavity in steel and the resulting defects. Causes: (1) shrinkage during pouring. (2) there are oxides and slag. 1.1.2 lamination — …