Analysis of forming properties during the isothermal upsetting of cylindrical workpieces in the viscous-plasticity mode

International Scientific and Practical Conference on Innovations in Engineering and Technology

工业技术;自然科学

Larin, S.N.^1 ; Pasynkov, A.A.^1

Tula State University, Lenina ave. 92, Tula

300012, Russia^1

关键词: Deformation forces;    Forming properties;    Friction conditions;    High-strength materials;    Isothermal deformation;    Short term creeps;    Technological parameters;    Technological process;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/441/1/012026/pdf
DOI  :  10.1088/1757-899X/441/1/012026

来源: IOP

【 摘 要 】

In the manufacturing of axisymmetric parts made of high-strength alloys, slow hot deformation is widely used, which makes it possible to increase significantly the plasticity properties of the material and to reduce the deformation force, as well as to achieve greater deformation. However, currently there are few studies discussing the issues of high-strength materials formation theory. This article considers the isothermal upsetting of cylindrical workpieces made of hard-to-deform alloys in the viscous-plasticity mode. The article introduces isothermal upsetting models regarding the short-term creep mode. The article reveals the influence of technological parameters and friction conditions existing on the contact surfaces of the working tool and workpiece on the material flow kinematics, stressed and deformed states, and the force conditions. The results obtained during their development can be used to create design methods for innovative, science-intensive, competitive technological processes of next generation for manufacturing axisymmetric geometrically-complex parts by means of isothermal deformation methods.