Abstract

A new method of metal ware production in conditions of the combination of continuous casting and metal simultaneous deformation in solid-liquid state is considered in this paper. The microstructure and mechanical properties of the obtained metal products from alloy D19 are investigated. This method of continuous casting is developed for production of long-length metalwares having improved mechanical and performance properties. The processing of D19 alloy enhances the strength and ductility characteristics in the fabricated metal by using this technology. It is shown that the obtained metalwares have a fine-grained directional structure. The grain boundaries are uneven and wide and consisting of a plexus of dislocation loops and grids. This internal structure is formed immediately during the crystallization process and provides increased mechanical characteristics. After leaving the crystallizer, metalwares from D19 alloy have the following mechanical characteristics: temporary tensile strength ≈290 MPa, yield strength ≈172 MPa, Brinell hardness ≈823 MPa, relative elongation of 25%. It is established that the considered technology and implemented device allow for a short production cycle to obtain metalwares from aluminum alloys with high mechanical properties without additional processing. The disadvantages of the existing laboratory device are attributed to the presence on the surface of the workpiece of periodic traces of movement of the moving walls of the crystallizer. However, this is a defect of the device, not the technology, and it will be eliminated. The presented constructive solution is a small-sized installation that does not require large production areas. When implementing this process, there is no need for furnaces to maintain the temperature of the workpiece in the required range, for example, in accordance with the requirements of the rolling process.

中文翻译：

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固液状态下金属的连续铸造和变形生产的D19合金长金属件的结构和力学性能的研究

摘要

本文研究了一种在连续铸造和金属固液同时变形相结合的条件下生产金属器皿的新方法。研究了从合金D1​​9获得的金属产品的微观结构和力学性能。开发这种连续铸造的方法是为了生产具有改善的机械和性能特性的长金属制品。通过使用这种技术，D19合金的加工增强了金属制品的强度和延展性。结果表明，所获得的金属器皿具有精细的定向结构。晶界不均匀且宽且由位错环和网格的丛组成。这种内部结构是在结晶过程中立即形成的，并提供了增强的机械特性。离开结晶器后，D19合金的金属制品具有以下机械特性：暂时抗拉强度≈290MPa，屈服强度≈172MPa，布氏硬度≈823MPa，相对伸长率为25％。已经确定的是，考虑到的技术和实施的装置允许短的生产周期来从具有高机械性能的铝合金获得金属制品而无需额外的处理。现有实验室设备的缺点归因于在工件表面上存在结晶器移动壁的周期性运动轨迹。但是，这是设备的缺陷，而不是技术的缺陷，它将消除。提出的建设性解决方案是不需要大型生产区域的小型安装。当实施该过程时，不需要炉子例如根据轧制过程的要求将工件的温度保持在所需范围内。