Experimental and numerical simulations for high speed forming processes: Development of a new low nickel stainless steel for cold heading applications

摘要

Forming processes are complex and involve interaction between the process variables and the material properties. A new impact test makes it possible to measure the strength as a function of the strain, strain rate and temperature. Comparison between experimental data and a numerical simulation of the test allows determining the coefficients of a rheological law. Then FEM prediction of a cold heading process is possible and it has been used to develop a new austenitic stainless steel grade for this market. It is compared with experimental data obtained in the compression test. All simulations are performed using with the implicit finite element code Forge 3 to ensure that the numerical discretisation provides a true simulation of the process.