Method and system for rolling 410S ferrite stainless steel

A technology of stainless steel and ferrite, applied in the direction of metal rolling, etc., can solve the problems of low efficiency, large thickness deviation of steel strip head and tail, unstable product quality, etc., and achieve the goal of reasonable production process, obvious effect and strong market competitiveness Effect

Inactive Publication Date: 2015-07-22
SHANDONG TAISHAN STEEL GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The applicant's stainless steel rolling mill originally used a steckel mill to roll 410S stainless steel, but the process method was inefficient and the product quality was unstable, especially the thickness deviation of the head and tail of the steel strip was large

Method used

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  • Method and system for rolling 410S ferrite stainless steel
  • Method and system for rolling 410S ferrite stainless steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The specifications of the slab to be rolled (thickness * width * length): 200×1525×10000mm, and the specifications of the rolled product (thickness * width): 3.5×1520mm.

[0036] Roll according to the following method:

[0037] The dwell time of the billet in the multi-stage walking beam reheating furnace 1: 210 minutes (cold billet charging furnace), the furnace is in a weak oxidizing atmosphere, the residual oxygen content is 3.7% by volume, and the furnace temperature is 1152°C. The heated plate The slab is descaled by the slab descaling machine 2 and then enters the four-high rough rolling mill 3 for 7 passes to form an intermediate slab. The slab descaling pressure is 23.75Mpa.

[0038] Four-high roughing mill 3 rolling 7 passes reduction ratio: 1st pass, 20.3%; 2nd pass, 25.7%; 3rd pass, 28%; 4th pass, 27.3%; 5th pass , 26.6%; the sixth pass, 26%; the seventh pass, 20.2%, the thickness of the intermediate billet is 26.9mm.

[0039] After cutting the head and tail of the ...

Embodiment 2

[0042] The specification of the slab to be rolled (thickness*width*length): 200×1530×10000mm, and the specification of the rolled product (thickness*width): 3.7×1520mm.

[0043] Roll according to the following method:

[0044] The dwell time of the billet in the multi-stage walking beam reheating furnace 1: 215 minutes (cold billet charging furnace), the furnace is in a weak oxidizing atmosphere, the residual oxygen content is 4.1% by volume, and the furnace temperature is 1150°C. The heated plate The slab is descaled by the slab descaling machine 2 and then enters the four-high rough rolling mill 3 for 7 passes to form an intermediate slab. The slab descaling pressure is 24 Mpa.

[0045] Four-high roughing mill 3 rolling 7 pass reduction ratio: 1st pass, 19%; 2nd pass, 25%; 3rd pass, 27%; 4th pass, 26%; 5th pass , 25%; the sixth pass, 26%; the seventh pass, 20%, the thickness of the intermediate billet is 29mm.

[0046] After cutting the head and tail of the intermediate billet by t...

Embodiment 3

[0049] The specification of the slab to be rolled (thickness * width * length): 200×1250×10800mm, and the specifications of the rolled product (thickness * width): 4.95×1240mm.

[0050] Roll according to the following method:

[0051] The dwell time of the billet in the multi-stage walking beam reheating furnace 1: 240 minutes (cold billet charging furnace), the furnace is in a weak oxidizing atmosphere, the residual oxygen content is 5.0% by volume, and the furnace temperature is 1155°C. The heated plate The slab is descaled by the slab descaling machine 2 and then enters the four-high rough rolling mill 3 for 7 passes to form an intermediate slab. The slab descaling pressure is 23.7Mpa.

[0052] Four-high roughing mill 3 rolling 7 pass reduction ratio: 1st pass, 18%; 2nd pass, 23%; 3rd pass, 26%; 4th pass, 25%; 5th pass , 24%; the sixth pass, 24%; the seventh pass, 22%, the thickness of the intermediate billet is 32mm.

[0053] After cutting the head and tail of the intermediate bi...

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Abstract

The invention discloses a method for rolling 410S ferrite stainless steel. The method includes the steps of 1, carrying out heating, wherein 410S ferrite stainless steel plate slabs are heated through multi-walking-beam type heating furnaces, the furnace staying time ranges from 180 minutes to 240 minutes, the tapping temperature ranges from 1140 DEG C to 1160 DEG C, and the amount of residual oxygen in the furnaces ranges from 3.0% to 5.0%; 2, carrying coarse rolling, wherein the heated plate slabs are descaled through a plate slab descaling machine to enter a four-roller coarse rolling machine to be rolled seven times to form intermediate slabs, and the reduction rate of each time of coarse rolling ranges from 18% to 30%; 3, rolling intermediate products, wherein after the heads and the tails of the intermediate slabs are cut off through a flying shear cutter, the intermediate slabs enter a steekle mill to be rolled three times to form the intermediate products, the each-time reduction rate of the steekle mill ranges from 32% to 49%, and the temperature of a reeling furnace ranges from 1110 DEG C to 1140 DEG C; 4, carrying out fine rolling, wherein the intermediate products sequentially enter a fine rolling unit to be continuously rolled to be at the finished-product thickness, and the reduction rate of each time of fine rolling ranges from 12% to 28%; 5, cooling finished products. The invention further discloses a system for rolling the 410S ferrite stainless steel. By means of the technological method, the production efficiency is high, the product quality is stable, and the difference between the heads and the tails of steel tape is small.

Description

Technical field [0001] The invention relates to a low chromium content 410S (06Cr13) ferritic stainless steel rolling method and system. Background technique [0002] 410S (06Cr13) stainless steel is low in cost, stable in price, and has many unique characteristics and advantages, which can replace austenitic stainless steel in many fields. Compared with austenitic stainless steel, ferritic stainless steel contains less nickel. The main raw materials are chromium and iron. In order to strengthen some special properties, some ferritic stainless steels also contain other alloying elements, such as molybdenum. At the same time, ferritic stainless steel not only has most of the mechanical properties and corrosion resistance of expensive austenitic stainless steel, but also has better performance than austenite in some properties, especially in formability, corrosion resistance, and oxidation resistance. Used in many fields such as automobiles, home appliances, hardware, tableware, e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B1/24
CPCB21B1/26
Inventor 陈培敦王学军亓海燕李志平李锋
Owner SHANDONG TAISHAN STEEL GROUP
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