In this paper,a new sample preparation method was provided for cold heading test of high speed wire based on experimental work, which has solved the key problem efficiently on cold heading test of curved wire.

Research on ductile fracture criteria and the application in cold heading process;

To introduce trial production course of ML08Al wire rod for cold heading from 150 mm×150 mm continuous casting billet.

Adopting the method of combining the Oyane Ductile Fracture Criteria with Finite Element Analysis(FEA) to analyze the deformation course of inner hexagonal bolt with 35K steel,the position for hexagonal bolt head to be easy broken and the cause are discussed,the crazing situations of inner hexagonal bolt in cold heading are forecasted,the results accord with practical breaking situation.

Design method for improving cold upsetting mould service life by lining technology;

On the basis of the analysis of the difficulties for forming the eccentric shaft by cold upsetting, the measures for solving the problem of material flow instability and the improvements in the structure of the die were proposed.

The design of cold upsetting process is usually carried out by an experienced designer from his own expertise, existing designs and the process rules.