INVESTIGATION OF THE HEATING TEMPERATURE INFLUENCE ON MECHANICAL CHARACTERISTICS AND DEFORM ABILITY OF STEEL OF TYPE 18HG AT NON-FULL HOT DEFORMATION

Abstract

Steel forming technology in conditions of warm forming is a process, which is very attractive for technological practice in term of lower energy consumption, higher quality of the surfase and dimensional precision of gorged pieces. Interval of recommended forming temperatures of steel in conditions of warm forming is narrow, therefore for successful development of this technology it is important to obtain more information about mechanical properties of materials, especially of plastic ones, at warm forming temperature. The plastic characteristic of 18ChG steel and influence of heat treatment on its formability are studied in this article. The importance of selection of forging temperature and material flow simulation in die cavity for economic production of rings shaped forged by warm forming is shown.