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借助光学显微镜(OM)、透射电镜(TEM)及电化学实验等方法研究了退火工艺对深冷轧制AISI310S奥氏体不锈钢显微组织和耐蚀性能的影响。结果表明:退火温度小于700℃,深冷变形组织处于回复阶段,退火温度大于700℃,深冷变形组织处于再结晶阶段,再结晶晶粒尺寸处于亚微米量级;随着退火温度增大至1000℃后,再结晶晶粒明显长大至2μm左右。极化曲线测试结果表明,与深冷变形奥氏体不锈钢相比,经退火处理后奥氏体不锈钢具有更高的自腐蚀电位,更低的腐蚀电流密度和更好的抗腐蚀性能。
The effects of annealing process on the microstructure and corrosion resistance of AISI310S austenitic stainless steel were studied by means of optical microscope (OM), transmission electron microscope (TEM) and electrochemical experiments. The results show that the annealing temperature is less than 700 ℃, the structure of cryogenic deformation is in the recovery stage, the annealing temperature is higher than 700 ℃, the microstructure of cryogenic deformation is in the recrystallization stage and the recrystallized grain size is on the order of submicron. As the annealing temperature increases to After recrystallization, the recrystallized grains grow up to about 2μm. Polarization curve test results show that the austenitic stainless steel has higher self-corrosion potential, lower corrosion current density and better corrosion resistance than the cryogenic deformation austenitic stainless steel after annealing treatment.