Thermal Deformation Behavior and Extrudability of 12Cr13 Martensitic Stainless Steel for Nuclear Power

Taking 12Cr13 martensite stainless steel for nuclear power as the research object, the thermal deformation behavior of the material was investigated by high temperature compression tests on a Gleeble thermal-mechanical simulator. DEFORM- 2D finite element software was used to analyze the extrudability of small diameter thick wall pipe under high strain rate, and a trial production test was carried out on a horizontal 42 MN extruder. The results show that the flow stress changes are negatively and positively correlated with deformation temperature and strain rate, respectively. The deformation temperature rises significantly under the high strain rate, which promotes the dynamic recrystallization of the material. With the increase of extrusion speed, the maximum strain rate, temperature rise of billet and rheological resistance increase significantly. The 12Cr13 small diameter thick wall tube billet is successfully extruded, according to the experimental and finite element analysis results combined with the working conditions.