The Finite Element Analysis On Bolt Upsetting Forming Of06Cr16Ni16Steel

06Cr16Ni16steel is used in the manufacture of turbine bolt, which is servedunder the environment of high temperature, high pressure and steam corrosion.06Cr16Ni16steel is austenitic creep-resisting steel, which is processed by upsettingforming in order to form fibrous tissue, to improve the ability of micro cracksinhibition, to enhance the performance of fatigue fracture resistance, and to improvethe ability of bolt relaxation suppression.06Cr16Ni16steel is characterized by its high temperature strength which isbetter than the other steels. However, high temperature strength has an adverse impacton its hot forging, such as more forming energy, more cracks and so on. These are allurgent topics that needs to be solved in hot forming of austenitic creep-resisting steel.The alloy content of06Cr16Ni16steel is very high. The smelting of06Cr16Ni16steelis complex. The price of06Cr16Ni16steel is expensive. So forming failure will causetremendous waste. In summary, it is necessary to simulate hot forging of06Cr16Ni16steel by finite element analysis to ensure product quality and reduce costs.The bolt size of06Cr16Ni16steel is M24×80.The upsetting forming is simulatedby DEFORM3D. The purpose of this paper is to analyze the performance of boltupsetting forming of austenitic creep-resisting steel. Secondly, we hope to find thedistribution of metal fibrous tissue and the reasonable parameters of upsetting formingof austenitic creep-resisting steel.In this paper, the research of upsetting forming simulation is divided into twoparts. The first part is the finite element analysis of the relation between the processparameters and the upsetting forming performance. The second part is the finiteelement analysis of the relation between the process parameters and the distribution ofmetal fibrous tissue. Through analysis and comparison in simulation, we get areasonable parameters: T=800℃, V=100mm/s and F=0.25. T is short for thedeformation temperature. V is short for the deformation velocity. F is short for thefriction coefficient. Under this condition, the bolt of06Cr16Ni16steel can get the bestforming performance and a reasonable distribution of metal fibrous tissue.This article has also discussed the difference between single-step forming andmulti-step forming by finite element analysis. The conclusion is that single-stepforming is more suitable than multi-step forming on06Cr16Ni16steel’s upsetting forming.This paper provides a basis for predicting defects and optimizing process on boltupsetting forming of06Cr16Ni16steel.