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A kind of high-strength tensile type cold-rolled strip steel and its preparation method

A technology of cold-rolled strip steel and tensile type, which is applied in the field of stainless steel manufacturing, can solve problems such as waste, affecting production speed, and low passivation rate, and achieves enhanced structural strength and hardness performance, good fluidity and transmission performance, and reduced cost effect

Active Publication Date: 2018-04-06
江苏华久辐条制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At the same time, in the existing cold-rolled steel strip production process, generally in each process of annealing, it is under the protection state of inert gas. When the annealing temperature is low, the inert gas is still used, which causes a lot of waste. In the cold-rolled strip passivation process, the cold-rolled strip is generally placed in a passivation solution, and the passivation rate is low, which seriously affects the production speed

Method used

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  • A kind of high-strength tensile type cold-rolled strip steel and its preparation method
  • A kind of high-strength tensile type cold-rolled strip steel and its preparation method
  • A kind of high-strength tensile type cold-rolled strip steel and its preparation method

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preparation example Construction

[0029] The preparation method of high-strength tensile type cold-rolled steel strip of the present invention is as follows,

[0030] a. Refining: After refining the above-mentioned components, cast them into slabs and remove phosphorus through a phosphorus removal device;

[0031] b. Hot rolling: the dephosphorized slab is heated at 1000°C to 1300°C through a hot coil box, and is pressed into strip steel by a finishing rolling unit for multiple times;

[0032] c. Annealing: Anneal the steel strip. The annealing is divided into three sections. The temperature of the first section is 800 ° C ~ 1000 ° C under the protection of nitrogen gas, and the temperature of the second section is 500 ° C ~ 800 ° C under the protection of nitrogen gas. The temperature of the third stage is 300℃~500℃, and it is cooled in the air state;

[0033] d. Electrolysis: Place the cooled strip steel in an electrolytic cleaning tank filled with alkaline electrolyte for electrolysis to remove residual gr...

Embodiment 1

[0040] 0.2% C, 0.1% Si, 10% Cr, 1.2% Mn, 0.8% Mo, 0.5% W, 1.25% Zn, 0.3% Ti, 0.8% Zr, 0.8% Sb , 8% Ni, 1% Cu, and 75.05% Fe are mixed and then refined, and then the slab is refined and dephosphorized by a dephosphorization machine; the dephosphorized slab is heated at 1000°C by a hot coil box , through the finishing rolling unit to carry out multiple pressings into strip steel; the strip steel is annealed, and the annealing is divided into three sections, the first section temperature is 800 ° C, under nitrogen protection, the second section temperature is 500 ° C, under nitrogen protection state, the temperature of the third section is 300 °C, and it is cooled in the air state; the strip steel after cooling is placed in an electrolytic cleaning tank filled with a sodium hydroxide solution with a mass fraction of 15% for electrolysis, and the electrolysis current density is 30 ~40A / dm 3 , for removing the residual grease on the surface of the steel strip; after the strip stee...

Embodiment 2

[0042] 0.5% C, 0.12% Si, 12% Cr, 1.4% Mn, 0.9% Mo, 0.8% W, 1.35% Zn, 0.8% Ti, 1.0% Zr, 0.9% Sb , 10% Ni, 1.5% Cu, and 68.73% Fe are mixed and then refined. After refining into a slab, the phosphorus is removed by a dephosphorization machine; the dephosphorized slab is heated at 1200°C by a hot coil box , through the finishing rolling mill for multiple times to press into strip steel; the strip steel is annealed, and the annealing is divided into three sections, the first section temperature is 900 ° C, under nitrogen protection, the second section temperature is 600 ° C, under nitrogen protection Under normal conditions, the temperature of the third section is 400 ° C, and it is cooled in the air state; the cooled strip steel is placed in an electrolytic cleaning tank with a mass fraction of 15% sodium hydroxide solution for electrolysis, and the electrolysis current density is 35A / dm 3 , for removing the residual grease on the surface of the steel strip; after the strip ste...

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Abstract

The invention relates to high strength tensile resistant cold-rolled steel strip which is characterized by comprising the following components in parts by weight: 0.2%-0.8% of C, 0.1%-0.15% of Si, 10%-15% of Cr, 1.2%-1.5% of Mn, 0.8%-1.0% of Mo, 0.5%-1.0% of W, 1.25%-1.5% of Zn, 0.3%-1.5% of Ti, 0.8%-1.2% of Zr, 0.8%-1.0% of Sb, 8%-12% of Ni, 1%-2% of Cu, and the balance of Fe. According to the high strength tensile resistant cold-rolled steel strip and the preparation method thereof, the various microelements are added into the cold-rolled steel strip according to the formula, so that the structural strength and the hardness performance of the cold-rolled steel strip after forming are enhanced.

Description

technical field [0001] The invention relates to the field of stainless steel manufacturing, in particular to a high-strength tensile cold-rolled steel strip and a preparation method thereof. technical background [0002] Stainless steel cold-rolled strip steel is based on iron element, and various trace elements are added to increase its metal properties and tensile properties. According to different proportions of elements, cold-rolled strip steel can produce different properties. [0003] At the same time, in the existing cold-rolled steel strip production process, generally in each process of annealing, it is under the protection state of inert gas. When the annealing temperature is low, the inert gas is still used, which causes a lot of waste. In the cold-rolled strip passivation process, the cold-rolled strip is generally placed in a passivation solution, and the passivation rate is low, which seriously affects the production speed. [0004] In view of the above-mentio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/04C22C38/02C22C38/42C22C38/44C22C38/50C22C38/60C21D8/02C23G1/08
CPCC21D8/0247C22C38/002C22C38/02C22C38/04C22C38/42C22C38/44C22C38/50C22C38/60C23G1/08
Inventor 王国宝
Owner 江苏华久辐条制造有限公司
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