PRODUCTION METHOD BY MEANS OF LIQUID FORGING AND HOT SHAPING

摘要

The invention can be used for producing intricate-shaped articles, including automobile wheels. During the production of products having a cross sectional variation and/or a peripheral part remote from a metal casting place, the pressure, strain rate and temperature parameters are selected under superplasticity conditions for given metal or alloy. The pressure increase carried out during the time starting from the advancement of a punch to a melt mirror prior to the crystallisation in the part of the article having the smallest cross section area and/or which is the most remote from the metal casting place. The die is heated to a temperature ensuring deformation under superplasticity conditions and the liquid state of a metal or alloy during the time of the pressure increase. Said invention makes it possible to improve the quality level of the product to the quality of hot-stamped products.