Production process of austenitic stainless steel slab used for high temperature resistant furnace hearth

Abstract

The invention relates to a production process of an austenitic stainless steel slab used for a high temperature resistant furnace hearth. The production process can save cost, reduce energy consumption and improve the economic benefit, and is green and environment-friendly. Steel tapping of Consteel electric furnace mother liquid contains the following components: greater than 1.0% of C, less than 1.0% of Si, less than or equal to 2% of Cr, 25-35% of Ni, less than 0.01% of P, 3-5% of W, and the balance Fe; steel tapping temperature is controlled to be 1580-1630 DEG C; the Consteel electric furnace mother liquid is blended with intermediate frequency furnace high carbon ferro-chrome molten steel and then the mixture is blended into an AOD furnace for smelting, and the steel tapping temperature after smelting is controlled to be 1550-1630 DEG C; a stainless steel solution contains the following components: 24-26% of Cr, 19-21% of Ni, 0.3-0.8% of Si, 0.02-0.06% of C, 1.0-1.5% of Mn, 1.5-2.5% of W, less than or equal to 0.2% of N, less than or equal to 0.04% of P, less than or equal to 0.03% of S, and the balance Fe; and the LF furnace crane ladle temperature is controlled to be 1500-1520 DEG C, and then continuous casting is carried out on the stainless steel solution by using a continuous casting machine to form a slab with thickness of 160-220 mm.

Description

technical field [0001] The invention relates to a manufacturing process of an austenitic stainless steel slab for a high-temperature-resistant furnace. Background technique [0002] The Consteel electric furnace steelmaking process is a new electric furnace steelmaking technology implemented in the 1990s. The electric furnace has the characteristics of continuous feeding, continuous preheating, continuous melting and continuous smelting. It has short smelting cycle, low smelting energy consumption, With the advantages of low noise and low investment cost, it is an advanced electric furnace smelting technology with strong vitality and competitiveness in the field of steelmaking. And there is no precedent for tungsten-containing stainless steel mother liquor. By adjusting the process parameters, the present invention can not only use Consteel electric furnace to smelt austenitic stainless steel mother liquor for high-temperature-resistant furnace, but also reduce power consump...

AI Technical Summary

Problems solved by technology

The maximum working temperature of 310S can reach 1200°C, and it can work continuously at 1100°C. It is usually used in a high temperature environment below 1100°C, but the service time in a high temperature environment is short. Body stainless steel has higher high temperature durability and high temperature oxidation resistance

This stainless steel has the advantages of high temperature resistance and low temperature strength, but it cannot meet the high temperature creep resistance and oxidation resistance requirements of the high temperature furnace.

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