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Cast rolling method and equipment of isometric crystal ferrite stainless steel slab band

A stainless steel plate and ferrite technology, applied in the field of axial crystal casting and rolling, can solve the problems of low equiaxed crystal rate, complicated control process, expensive equipment, etc., and achieve the effects of uniform temperature, improved purity and improved surface quality

Inactive Publication Date: 2008-11-05
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a casting method for equiaxed ferritic stainless steel plate and strip in view of the technical problems of complex equiaxed crystallization control process, expensive equipment and low equiaxed crystallization rate of ferritic stainless steel plate and strip casting slab. Rolling technology and equipment

Method used

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  • Cast rolling method and equipment of isometric crystal ferrite stainless steel slab band
  • Cast rolling method and equipment of isometric crystal ferrite stainless steel slab band
  • Cast rolling method and equipment of isometric crystal ferrite stainless steel slab band

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Experimental program
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Effect test

Embodiment 1

[0041] The chemical composition is: [C]≤0.12%, [Si]≤0.75%, [Mn]≤0.80%, [S]≤0.030%, [P]≤0.035%, [Cr]=16~18%, [Ni ]≤0.60%, Fe is the balance of ferritic stainless steel raw materials, after preheating, put into 40Kg intermediate frequency induction furnace 1, heating power is 10KW, when the temperature reaches 900 ℃, the gas supply device 11 to the induction furnace 1 The inert gas is introduced into the medium, and the melting is carried out under the inert protective gas. When the temperature reaches 1200°C, add DFC-700 stainless steel slagging agent, carry out stirring and refining for 5 minutes, and let air blow slag and let it stand for 5 minutes. Then, when the temperature reaches 1100°C, preheat the tundish 6, the gate 4, the spout 5, and the side sealing plate 3 for about 10 minutes. When the temperature of the liquid ferritic stainless steel reaches 1480°C, keep it warm for 10 minutes, pour it into the tundish 6 under the protection of inert gas, and the tundish 6 shou...

Embodiment 2

[0043] The chemical composition is: [C]≤0.1%, [Si]≤0.6%, [Mn]≤0.3%, [S]≤0.005%, [P]≤0.02%, [Cr]=11~11.5%, [Ti ] ≤ 0.5%, [Nb] ≤ 0.3%, Fe is the balance of the ferritic stainless steel raw material after preheating, put it into the 40Kg intermediate frequency induction furnace 1, the heating power is 25KW, when the temperature reaches 1050 ℃, by the gas supply The device 11 feeds an inert gas into the induction furnace 1 to carry out smelting under an inert protective gas. When the temperature reaches 1200°C, add DFC-700 stainless steel slagging agent, carry out stirring and refining for 15 minutes, blow the slag with 5 atmospheres of argon, and let it stand for about 15 minutes. Then, when the temperature reaches 1300°C, preheat the tundish 6, the gate 4, the spout 5, and the side sealing plate 3 for about 15 minutes. When the temperature of the liquid ferritic stainless steel reaches 1560°C, keep it warm for 10 minutes, pour it into the tundish 6 under the protection of inert...

Embodiment 3

[0045]The chemical composition is: [C]≤0.12%, [Si]≤0.75%, [Mn]≤0.80%, [S]≤0.030%, [P]≤0.035%, [Cr]=16~18%, [Ni ]≤0.60%, Fe is the balance of ferritic stainless steel raw materials, after preheating, put into 40Kg medium frequency induction furnace 1, heating power is 25KW, when the temperature reaches 1050 ℃, the gas supply device 11 to the induction furnace 1 The inert gas is introduced into the medium, and the melting is carried out under the inert protective gas. When the temperature reaches 1200°C, add DFC-700 stainless steel slagging agent, carry out stirring and refining for 15 minutes, and let air blow slag and let it stand for 15 minutes. Then, when the temperature reaches 1300°C, preheat the tundish 6, the gate 4, the spout 5, and the side sealing plate 3 for about 15 minutes. When the temperature of the liquid ferritic stainless steel reaches 1490°C, keep it warm for 10 minutes, pour it into the tundish 6 under the protection of inert gas, and the tundish 6 should k...

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Abstract

The invention relates to a method for rolling equiax crystal ferrite stainless steel band, wherein it uses ferrite stainless steel as base material, to be fused, slag blown, preheated, irrigated and rolled into ferrite stainless band. The rolling temperature is controlled 1500-1600 Deg. C; the rolling speed is 10-50m / min; the rolling pressure is 50-200KN. And the inventive device comprises middle-frequency sensitive furnace, rolling machine, middle pack; the rolling machine is dual-roller horizontal rolling machine with internal cooling roller; the rolling machine has online preheater, online gas supplier, online pool temperature detector and pool level height detector, automatic roller slim adjuster, roller speed automatic adjuster. The invention can avoid electromagnetic mixing technique, and titanium element, to shorten the process, whilet the equiax crystal degree is 100%.

Description

technical field [0001] The invention relates to the technical field of preparation of ferritic stainless steel strips, in particular to equiaxed crystal casting and rolling technology of ferritic stainless steel strips. Background technique [0002] Ferritic stainless steel refers to stainless steel with a chromium content of 11% to 30%, a body-centered cubic crystal structure, and a ferrite structure in use. In addition to its stainless and general corrosion resistance, ferritic stainless steel has excellent local corrosion resistance such as chloride stress corrosion resistance, pitting corrosion resistance, and crevice corrosion resistance. In addition, ferritic stainless steel has high strength, low tendency to cold work hardening, high thermal conductivity, and low linear expansion coefficient. Therefore, from its birth to the present, ferritic stainless steel has been widely used in nearly a hundred years. [0003] Since ferritic stainless steel does not contain nick...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B1/46B21B37/74B21B37/46B21B37/48B21B37/58B21B37/16B21B37/56B21B15/00B21B27/02B22D11/18B22D41/00C21D9/46C21D11/00B23P23/04
Inventor 刘振宇邱以清刘海涛李成刚曹光明刘相华王国栋
Owner NORTHEASTERN UNIV LIAONING
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