Method for producing hot-rolled ferritic stainless steel strip steel

Abstract

The invention discloses a method for producing a hot-rolled ferrite stainless strip steel, which comprises the following steps: 1) the chemical components by weight percentage are: 0.025-0.04 percent of C, less than or equal to 1.00 percent of Si, 0.25-0.4 percent of Mn, less than or equal to 0.030 percent of S, less than or equal to 0.035 of P, 12-12.5 percent of Cr and the rest is Fe; 2) a billet is formed by smelting and casting; 3) heating: the heating temperature zone for heating are divided into a heat recovery section, a preheating section, a I heating section, a II heating section and a holding section; furnace gas is controlled to be neutral atmosphere of non-oxidizing atmosphere; 4) when in heat rolling and rough rolling, the rolling temperature is 1,120 DEG C-1,160 DEG C, and the deforming speed during rolling is 10 / s-12 / s; 5) finish rolling: the deforming speed of the last pass rolling is 60 / s-90 / s, and the outlet temperature of the finish rolling is more than 900 DEG C; 6) cooling is carried out after rolling, and then reeling is carried out. The method of the invention has the advantages that the method guarantees not only the edge quality of the hot-rolled strip steel but also the stamping property of the cold-rolled strip steel, improves the surface finish quality and lowers the production cost, and has high production efficiency and rolling yield, etc.

Description

technical field [0001] The invention relates to a stainless steel strip rolling technology, in particular to a production method of a hot-rolled ferritic stainless steel strip. Background technique [0002] In the production of ferritic stainless steel such as 410S hot-rolled strip steel, the slab is prone to surface cracks during the continuous casting process, and cracked edges are prone to occur during hot rolling. At the same time, surface cracks are also a common quality defect such as 410S continuous casting slabs. In severe cases, the entire slab will be scrapped, and even cracks and breakouts will occur, which will bring harm to continuous casting production and equipment. As its severity increases and its quantity increases, indicators such as slab defect-free rate, pass rate, and yield rate, which measure the level of continuous casting, decrease, and the consumption and cost of steel raw materials increase. As the raw material of cold-rolled coils—hot-rolled coil...

AI Technical Summary

Problems solved by technology

However, after adopting this method, after the hot-rolled strip is cold-rolled, it is easy to produce stamping defects, resulting in rough surface of stainless steel products, which affects the appearance and use.

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