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Al–Cu–B4C Composite Materials for the Production of High-Strength Billets
Metallurgist ( IF 0.9 ) Pub Date : 2020-09-01 , DOI: 10.1007/s11015-020-01028-2
A. L. Alattar , V. Y. Bazhin

Composite materials based on aluminum are used in various fields of metallurgy and, in particular, for the production of high-strength products whose properties, such as low density, low coefficient of thermal expansion, and thermal stability, satisfy basic requirements imposed in the course of their operation. At present, we observe rapid development of the technologies of production of high-strength aluminum alloys with composite compounds characterized by the improved mechanical characteristics for a given level of plasticity. The existing technologies of modification of the alloys with ceramic materials, such as B 4 C, guarantee the required operating characteristics for cast and, especially, rolled billets. However, high levels of segregation of particles in the aluminum matrix, the heterogeneity of the surface of composite particles in the course of the rolling, and low wettability sharply worsen the quality of billets and, hence, lead to a decrease in the yield of useful products. Solid B 4 C particles form a rigid reinforcing frame in the aluminum matrix of the composite responsible for the unique properties of the aluminum alloy (such as stiffness, strength, thermal, and electric properties). On the basis of the aluminum matrix, we have produced a multicomponent Al–Cu–B 4 C composite material. The matrix material with a copper content of 5% was produced by introducing boron carbide particles (2.0–7.0%) in the stage of melting. It is shown that the technology of injection casting into a given mold decreases the level of porosity, which creates conditions for the production of high-quality composites of the Al– Cu–B 4 C system with high level of the mechanical properties.

中文翻译:

用于生产高强度钢坯的 Al-Cu-B4C 复合材料

铝基复合材料用于冶金的各个领域,特别是用于生产高强度产品,其特性如低密度、低热膨胀系数和热稳定性满足课程中提出的基本要求他们的操作。目前,我们观察到具有复合化合物的高强度铝合金生产技术的快速发展,其特点是在给定的塑性水平下提高了机械特性。现有的用陶瓷材料对合金进行改性的技术,例如 B 4 C,保证了铸件,尤其是轧制坯料所需的操作特性。然而,铝基体中的颗粒高度偏析,在轧制过程中复合颗粒表面的不均匀性和低润湿性使坯料质量急剧恶化,从而导致有用产品的产量下降。固体 B 4 C 颗粒在复合材料的铝基体中形成刚性增强框架,负责铝合金的独特性能(例如刚度、强度、热和电性能)。在铝基体的基础上,我们生产了一种多组分 Al-Cu-B 4 C 复合材料。通过在熔化阶段引入碳化硼颗粒(2.0-7.0%)生产铜含量为 5% 的基体材料。结果表明,注射铸造到给定模具中的技术降低了孔隙率,
更新日期:2020-09-01
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