Experimental Analysis of Optimization Parameters of Lubrication Process for Cold-drawing 45 Steel
The lubrication treatment before cold-drawing is considerably important pretreatment procedure,which directly affects the force and quality of the drawing.Taking 45 steel for the cold-drawing drive shaft as an example,the parameters of the lubrication 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 temperature of phosphating solution is 75℃,the time of phosphating solution is 20 min.The saponification treatment after phosphating in the above process parameters forms the uniform and fine lubricating film,which can achieve good lubricating effects.