Abstract

In this paper, we study the regularities of surface-relief formation, the elemental and phase composition distribution over depth, and an increase in the surface microhardness of steel 45 depending on the parameters of electroexplosive boron-copper plating and subsequent electron-beam processing. The structure of the region of electroexplosive alloying with a thickness of up to 25 μm in depth is shown to include a coating, and surface, intermediate, and boundary layers. At an increase in the absorbed power density and the boron powder weight, the surface roughness of the electroexplosive boron-copper plating region increases while the microhardness increases up to 1400 HV. Subsequent processing by a pulsed electron beam leads to unification of the coating with the surface layer, an increase in the depth of the hardening region to 80 μm and a decrease in the surface roughness and microhardness to 800 HV. Improvement in the physical and mechanical properties of the alloying region is due to the formation of submicrocrystalline and nanocrystalline quenching structures containing hardening phases.

中文翻译：

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45钢电爆镀硼铜和电子束处理后的组织和表面性能

摘要

在本文中，我们研究了表面浮雕形成的规律、元素和相组成随深度的分布以及钢 45 表面显微硬度的增加，这取决于电爆镀硼铜和后续电子束处理的参数。深度达 25 μm 的电爆合金化区域的结构显示包括涂层、表面层、中间层和边界层。随着吸收功率密度和硼粉重量的增加，电爆硼铜镀层区域的表面粗糙度增加，而显微硬度增加到 1400 HV。脉冲电子束的后续处理导致涂层与表面层的统一，硬化区域的深度增加到 80 μm，表面粗糙度和显微硬度降低到 800 HV。合金化区域的物理和机械性能的改善是由于形成了含有硬化相的亚微晶和纳米晶淬火结构。