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讨论了用热氢处理方法来控制ВТ5Л和ВТ20Л铸造合金的组织及提高其综合力学性能的可能性,热氢处理就是把氢的可逆合金化与对氢化的材料产生热影响结合起来。业已证明,采用通过合理选择氢浓度、渗氢温度、冷却和除气速度条件控制βα转变机理为依据的热氢处理工艺流程,可把粗大的片状铸造组织转变为细小的弥散组织。热氢处理可保证提高合金的强度与塑性,特别是可提高合金的疲劳持久强度。
The possibility of controlling the microstructure and improving the mechanical properties of ВТ5Л and ВТ20Л cast alloys by means of hydrothermal treatment is discussed. Hydrogen hydrotreating combines the reversible alloying of hydrogen with the thermal effects on hydrogenated materials. It has been demonstrated that the use of a hydrothermal treatment process based on a reasonable choice of hydrogen concentration, hydrogen permeation temperature, cooling and outgassing conditions to control the βα transformation mechanism allows the transformation of coarse, sheet-like foundry structures into finely dispersed structures. Hydrogen heat treatment can improve the strength and ductility of the alloy, especially the fatigue strength of the alloy.