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Stainless cold-rolling strip steel and manufacturing method thereof

A cold-rolled strip, unavoidable technology, used in metal rolling, rolling force/roll gap control, temperature control, etc., can solve problems such as cost increase, and achieve production cost reduction, good processability, and improved strength. Effect

Active Publication Date: 2010-06-09
BAOSTEEL DESHENG STAINLESS STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the microstructure of Cr17 type ferritic stainless strip steel produced at home and abroad is mainly ferrite, and a small amount of trace alloying elements such as titanium and niobium are added to improve the corrosion resistance and strength of the steel, and some steel types also add molybdenum. , due to the rising price of molybdenum in recent years, the addition of molybdenum will significantly increase the cost of steel

Method used

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Embodiment Construction

[0043] The invention reduces the production cost of stainless cold-rolled strip steel under the condition of obtaining high strength by adjusting the composition of the steel grade and changing the hot working and cold working process, so that the ferritic stainless steel can obtain higher strength after cold working And good ductility to meet the needs of deformation processing.

[0044] The characteristics of the present invention will be described in detail below through specific embodiments.

[0045] The composition weight percentage of the steel type of the present invention is: C≤0.02, Si: 0.2~0.80, Mn: 0.1~0.80, P≤0.040, S≤0.015, Cr 16.5~19.5, Nb: 0.2~0.6, N≤0.02, Al : 0.005 ~ 0.08, the rest is Fe and unavoidable impurities.

[0046]The steel with the above composition is manufactured by the following method: using molten iron, alloy and ferroalloy raw materials (or carbon scrap steel, scrap steel with the same and similar composition), and smelting through electric fu...

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PUM

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Abstract

The invention relates to a stainless cold-rolling strip steel containing the following components in percentage by weight: not more than 0.02 wt% of C, 0.3 to 0.80 wt% of Si, 0.2 to 0.80 wt% of Mn, not more than 0.040 wt% of P, not more than 0.15 wt% of S, 16.5 to 19.5 wt% of Cr, not more than 0.02 wt% of N, 0.2 to 0.6 wt% of Nb, 0.005 to 0.08 wt% of Al and the balance of Fe and inevitable impurities. The manufacturing method of the stainless cold-rolling strip steel comprises the following steps of: continuously casting the components into a plate blank after smelting, wherein the electromagnetic stirring is adopted in the continuous casting process so that the isometric crystal ratio of the section of the plate blank reaches above 40%; hot rolling: the plate blank is heated to 950 to 1200 DEG C, rolled into strip steel for multiple times and then coiled into a steel roll, wherein the final rolling temperature is 750 to 900 DEG C, the coiling temperature is 350 to 700 DEG C, and then the steel roll is air-cooled into the room temperature; cold rolling: the hot-rolled steel roll is firstly acid-washed, wherein the annealing temperature is 800 to 1000 DEG C, and the annealing time is 0.5 to 5.0 min; rolling for multiple times by cold rolling, wherein the overall reduction is 60% to 75%; and finally annealing the cold-rolled strip steel by acid washing, wherein the annealing temperature is 800 to 1,050 DEG C, and the annealing time is 0.5 to 3 min; and cooling the steel roll below 550 DEG C so that the high-strength strip steel is obtained.

Description

technical field [0001] The invention relates to a stainless steel cold-rolled steel strip and a manufacturing method thereof, in particular to a high-strength niobium-containing stainless cold-rolled steel strip and a manufacturing method thereof. Background technique [0002] At present, the microstructure of Cr17 type ferritic stainless strip steel produced at home and abroad is mainly ferrite, and a small amount of trace alloying elements such as titanium and niobium are added to improve the corrosion resistance and strength of the steel, and some steel types also add molybdenum. , due to the rising price of molybdenum in recent years, the addition of molybdenum will significantly increase the cost of steel. [0003] Table 1 is the standard composition of the same type of ferritic stainless steel in the world, and Table 2 is the mechanical properties of the five grades of steel in 1. [0004] Table 1 [0005] Country grade C Si mn P ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/26C21D8/02B21B1/22B21B37/74B21B37/58B22D11/115
Inventor 郑宏光翟瑞银何慎沈继程常锷陆斌
Owner BAOSTEEL DESHENG STAINLESS STEEL
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