A hot pressing method was used to obtain a layered composite consisting of alternating layers of AISI 439 type steel with a high nitrogen content (0.8%) and Fe-20% Cr-5%V alloy with a low nitrogen content (less than 0.02%). Annealing of the composite at T = 700–850 °C after hot pressing leads to diffusion of nitrogen from the nitrided AISI 439 layers into the Fe–Cr–V layers, the formation of diffusion zones containing dispersed vanadium nitrides in the Fe–Cr–V layers and the formation of diffusion zones with a low nitrogen content in the AISI 439 layers. A tendency towards a decrease in the sizes of the vanadium nitride particles with decreasing annealing temperature was revealed. Annealing at T = 750 °C increases the plastic characteristics and reduces the strength characteristics of the composite compared to the state after hot pressing. The presence of dispersed vanadium nitrides precipitated in the composite structure during annealing increases the strength of the composite by 15%.

Graphical abstract

中文翻译：

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Fe-Cr-V合金和高氮高铬钢热压退火后层状复合材料的组织和力学性能

使用热压法获得由高氮含量（0.8％）的AISI 439型钢和低氮含量（小于0.02％）的Fe-20％Cr-5％V合金的交替层组成的层状复合材料）。复合材料在 热压后在T = 700–850°C时退火，导致氮气从氮化的AISI 439层扩散到Fe–Cr–V层中，从而在Fe–Cr–中形成包含分散的氮化钒的扩散区V层和AISI 439层中低氮含量的扩散区的形成。揭示了随着退火温度的降低氮化钒颗粒尺寸减小的趋势。T退火 与热压后的状态相比，= 750°C会提高复合材料的塑性，并降低复合材料的强度。在退火过程中，在复合结构中析出的分散钒氮化物的存在使复合材料的强度提高了15％。

图形概要