High-performance silicon-containing ferrite/martensitic steel

Abstract

The invention discloses high-performance silicon-containing ferrite / martensitic steel, and relates to the technical field of metal materials. The high-performance silicon-containing ferrite / martensitic steel comprises, by weight: 0.11 to 0.13 percent of C, 8.5 to 10 percent of Cr, 1.3 to 1.7 percent of W, 0.4 to 0.6 percent of Mn, 0.05 to 0.15 percent of Ta, 0.15 to 0.25 percent of V, 0.005 to 0.015 percent of Zr, 0.7 to 1.2 percent of Si, and the balance Fe and inevitable impurities. A preparation method comprises the following steps: smelting and pouring according to the formula of the alloy steel components to obtain a steel cast ingot, and carrying out equal-channel angular extrusion treatment on the steel cast ingot, specifically, annealing treatment is carried out after each pass of extrusion treatment. The chemical components and the processing process of the F / M alloy steel are improved, the microstructure of 9Cr-F / M steel, including the type, size and distribution of precipitated phases, is regulated and controlled, and the comprehensive mechanical property of the alloy steel is improved.

Description

technical field [0001] The invention relates to the technical field of metal materials, in particular to a high-performance silicon-containing ferrite / martensitic steel. Background technique [0002] With the rapid development of my country's national economy, energy issues are becoming a bottleneck restricting the sustainable development of my country's economy, society and environment. The discovery and application of nuclear energy is one of the greatest scientific and technological achievements of mankind in the 20th century. It is an energy that can replace fossil energy on a large scale, meet the growing demand for electricity, improve the energy consumption structure, and especially alleviate greenhouse gas emissions. Nuclear energy is generated in a nuclear reactor, and a key part of the nuclear reactor is the nuclear fuel cladding. For nuclear fuel cladding materials, it not only loads and supports nuclear fuel, but also serves as a second key barrier to prevent ra...

AI Technical Summary

Problems solved by technology

Although there are a lot of reports on the process of preparing ferritic / martensitic (F / M) alloy steel, they mainly focus on casting-forging-hot rolling-normalizing-tempering, and reports on the casting-ECAP process However, the comprehensive mechanical properties of the F / M alloy steel prepared by the existing technology are average and need to be further improved.

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