The lubrication treatment before cold-drawing is considerably important pretreatment procedure, which directly affects the lbrce and quality of the drawing. Taking 45 steel for the cold-drawing drive shaft as an example, the parameters of the habrication process were optimized by orthogonal experiment. The morphology and composition of zinc-based phosphating coating and saponification at medium temperature were analyzed by SEM. The better parameters of phosphating process were determined as follows： the PH of phosphating solution is 2.0, the t...
