We experimentally constructed and computed thermokinetic diagrams of decomposition of supercooled austenite of Ramor-500 and Armox-500 armor steels. The temperatures of phase transformations, microstructure, and mechanical properties of the metal of the heat-affected zone are determined as a result of the simulation of thermal deformation welding at different cooling rates in a Gleeble-3800 installation. We determine the limit values of the cooling rate when the metal of the near-weld zone of welded joints of these steels can be softened down to a level lower than the minimum guaranteed characteristics of strength of the base metal.

中文翻译：

---

结构转变对铠装钢焊接接头力学性能的影响

我们通过实验构建和计算了Ramor-500和Armox-500装甲钢的过冷奥氏体分解的热动力学图。在Gleeble-3800装置中，通过模拟在不同冷却速率下进行热变形焊接的结果，可以确定热影响区金属的相变，组织和机械性能的温度。当这些钢的焊接接头的近焊区的金属可以软化到低于母材强度的最低保证特征时，我们确定冷却速率的极限值。