Novel anti-scaffolding heat-resisting alloy, hearth roll of stainless steel normalizing furnace and production process thereof

Abstract

The invention provides a novel anti-nodulation heat resistant alloy, a stainless-steel normalizing furnace bottom roller and a manufacturing technique thereof, which is characterized in that the anti-nodulation heat resistant alloy comprises the following components by weight percentage: C, 0.10-0.50; Cr, 20.0-28.0; Ni, 20.0-38.0; Nb, 1.0-4.0; Ce, 0.010-0.030; Al, less than or equal to 5.0; Mn, less than or equal to 2.0; Si, less than or equal to 1.8; P, less than or equal to 0.025; S, less than or equal to 0.025; the rest, Fe. The manufacturing technique of the stainless-steel normalizing furnace bottom roller consists of casting process and heat treatment process. The alloy has the advantages of high anti-corrosion capability of fuel gas and higher performance of surface nodulation resistance. The alloy has super-strong capability of surface nodulation resistance and super-long service life, when used in the stainless-steel normalizing furnace bottom roller.

Description

New anti-nodulation heat-resistant alloy and stainless steel normalizing furnace hearth roll and its production process technical field The invention provides a new type of anti-nodulation heat-resistant alloy for stainless steel normalizing furnace bottom roll and the stainless steel normalizing furnace bottom roll and its production process. By determining a reasonable alloying scheme, optimizing A new anti-nodulation stainless steel normalizing furnace and other heat-resistant parts are formed by selecting a reasonable casting process and designing an effective heat treatment process based on chemical composition. Background technique At present, the heat-resistant steel used in the hearth roll of the stainless steel normalizing furnace in the domestic stainless steel hot rolling mill has been ZG40Cr25Ni20 for a long time. Months later, nodules formed on the surface of the furnace hearth roll, which directly affected the quality of the stainless steel medium plate. Many...

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Problems solved by technology

At present, the heat-resistant steel used in stainless steel normalizing furnace hearth rolls in stainless steel hot rolling mills has been ZG40Cr25Ni20 for a long time, and the problem of normalizing furnace hearth rolls is that 3-5 pieces are used in the furnace temperature range of 600-1150 °C. Months later, nodules appeared on the surface of the furnace hearth roll, which directly affected the quality of the stainless steel medium plate. Many stainless steel hot rolling mills at home and abroad found that this problem existed