Page 6 - 数值模拟驱动的高温合金热加工技术

ABSTRACT
Hot working refers to the plastic deformation process of metal
materials carried out under conditions higher than the start temperature
of recrystallization. During hot deformation, both work hardening and
recrystallization softening processes occur simultaneously, and work hardening
is almost simultaneously eliminated by recrystallization. Due to the high
deformation temperature, the material has low deformation resistance and
good plasticity, which is conducive to processing and forming. Therefore, hot
deformation is the main method of metal plastic processing. Common hot
deformation methods include extrusion, rolling, and forging. High temperature
alloys refer to high-temperature metal materials that work for a long time
under certain stress conditions above 760℃~150℃. They have excellent high-
temperature strength, good oxidation and corrosion resistance, good fatigue
performance, fracture toughness and other comprehensive properties. The
service conditions of high-temperature alloys require them to maintain high
strength at high temperatures, and most high-temperature alloys have high
temperature and low plasticity. Therefore, the thermal processing difficulty of
high-temperature alloys is greater than that of ordinary steel. In order to obtain
high-quality components, it is necessary to study the entire process through
computer numerical simulation and analyze the influence of process parameters
on the thermal processing microstructure and material properties. Based on
this, this book elaborates on the relevant content of numerical simulation
driven high-temperature alloy hot processing technology from the aspects of
overview of high-temperature alloys and hot processing technology, basic
theory and methods of numerical simulation, simulation and defect control of
casting solidification process, numerical simulation of high-temperature alloy
forging process, simulation technology of welding and heat treatment process,
optimization of process parameters and application of intelligent algorithms,
industrial application cases and future development trends.