一前言热扭转试验对于测定金属在不同温度和变形速度条件下的性能和组织有着重要意义。由于热扭转过程中,试样截面基本保持不变,可对金属变形能进行定量分析。最大扭矩与金属变形抗力有关,断裂转数则是评价金属塑性的重要判据之一。试验中途还可喷水快速冷却试样,以研究热塑性变形与金属晶粒组织的 A preface The hot torsion test is of great importance for determining the properties and organization of metals at different temperatures and deformation speeds. Due to the thermal torsion process, the specimen cross-section remains basically unchanged, and the metal deformation energy can be quantitatively analyzed. The maximum torque is related to the metal deformation resistance, which is one of the important criteria to evaluate the metal plasticity. In the middle of the experiment, the sample can be quickly cooled by spraying water to study the relationship between the thermoplastic deformation and the metal grain structure