Steel in Translation Pub Date : 2021-01-27 , DOI: 10.3103/s096709122009003x E. A. Chernyshov , I. V. Baev , A. D. Romanov
Abstract
This work discusses the influence of external impact upon pouring of high strength alloyed steel into thin walled molds with external cooling and in the same molds with suspension pouring: complex impact on hardened casting. Selection of these technologies is substantiated. The casting produced in a 3D liquid glass mold was used as reference. Microstructure, fracture, and mechanical proports of metal were analyzed at regular (+20°C) and higher (+350°C) temperatures. The most dense and homogeneous structure and fracture were obtained for the casting upon complex impact. It has been established that the main advantage of the proposed technologies is improvement of homogeneity of mechanical properties across the cross section and height of castings, especially of plastic properties and impact viscosity. Anisotropy of the properties across cross sections and height of experimental castings is significantly lower than in reference casting. It has been established that the external and complex impact on formed casting allows to improve its mechanical properties upon various test temperatures. The casting produced in a metal shell mold with forced cooling exhibits no significant differences of mechanical properties both across its heigh and cross section. Herewith, the strength is in average by 100 MPa higher than that of reference casting at the same high plasticity and impact viscosity.
中文翻译:
液态钢和结晶钢不同钢包工艺下铸件的力学性能和组织
摘要
这项工作讨论了外部冲击对通过外部冷却将高强度合金钢浇铸到薄壁模具中以及在使用悬浮浇铸的相同模具中的影响:对淬硬铸件的复杂影响。这些技术的选择得到证实。将在3D液态玻璃模具中生产的铸件用作参考。在常规温度(+ 20°C)和更高温度(+ 350°C)下分析了金属的微观结构,断裂和机械性能。在复杂冲击下,铸件获得了最致密,最均匀的组织和断裂。已经确定,所提出的技术的主要优点是改善了横截面的机械性能和铸件高度的均匀性,特别是塑性和冲击粘度的均匀性。实验铸件的横截面和高度的各向异性明显低于参考铸件。已经确定的是,对成型铸件的外部和复杂的冲击允许在各种测试温度下改善其机械性能。在具有强制冷却的金属壳模具中生产的铸件在其高度和横截面上均没有表现出明显的机械性能差异。因此,在相同的高塑性和冲击粘度下,强度平均比参考铸件高100 MPa。在具有强制冷却的金属壳模具中生产的铸件在其高度和横截面上均没有表现出明显的机械性能差异。因此,在相同的高塑性和冲击粘度下,强度平均比参考铸件高100 MPa。在具有强制冷却的金属壳模具中生产的铸件在其整个高度和横截面上均没有表现出明显的机械性能差异。因此,在相同的高塑性和冲击粘度下,强度平均比参考铸件高100 MPa。