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A kind of production method of cold-rolled steel strip for fire extinguisher

A technology of cold-rolled steel strip and production method, which is applied in the direction of metal rolling, etc., which can solve the problems of wide fluctuation range of steel coil temperature, influence on material properties, and uneven performance of strip steel, so as to reduce recrystallization annealing temperature and improve product qualification The effect of improving the efficiency and improving product stability

Inactive Publication Date: 2016-04-13
JIGANG GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it often has problems such as complex process flow, high cost, uneven performance of strip steel, and difficult control of surface roughness. The degreasing process is used to remove surface oil after the raw material rolling of steel. The annealing temperature is generally 660-720°C, the holding time is different, and the temperature fluctuation range of the steel coil is wide.
There is no report on the production method of cold-rolled steel strip for fire extinguishers

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 1) Selection of raw materials: hot-rolled pickling raw materials are selected, and the mass percentages of the raw materials are designed as follows: C0.04%, Si0.03%, Mn0.14%, S0.004%, P0.014%, Al0.028% , The rest are trace impurities such as iron and unavoidable Cu; the convexity of the raw material is 40um, and the wedge shape is 20um.

[0021] 2) Cold rolling: The hot-rolled pickling plate with a thickness of 3.5mm and a width of 1263mm is cold-rolled on a high-precision double-stand reversible four-roll mill. During the rolling process, the process lubricant is Shanghai Henkel with high stability. The 862 type rolling oil provided by the company is configured with desalted water to form a cold-rolling emulsion with a mass concentration of 3.0%. The stability coefficient is controlled at 0.9, and the cold-rolling temperature is controlled at 54°C. After two rolling passes, it is rolled to 1.31mm. The speed of the first rolling pass is 300m / min, the reduction ratio is...

Embodiment 2

[0029] 1) Raw material selection: hot-rolled pickling raw materials are selected, and the mass percentages of the raw material components are designed as follows: C0.05%, Si0.02%, Mn0.14%, S0.005%, P0.013%, Al0.027% , The rest are trace impurities such as iron and unavoidable Cu; the convexity of the raw material is 35um, and the wedge shape is 25um.

[0030]2) Cold rolling: The hot-rolled pickling plate with a thickness of 3.5mm and a width of 1232mm is cold-rolled on a high-precision single-stand reversible six-high rolling mill. During the rolling process, the process lubricant is Shanghai Houghton with high stability. The FD1 rolling oil provided by the company is configured with desalted water to form a cold rolling emulsion with a mass concentration of 4.0%. The stability coefficient is controlled at 0.88, and the cold rolling temperature is controlled at 56°C. The speed of the first pass is 350m / min, the reduction rate is controlled at 28%, the speed of the remaining pa...

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PUM

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Abstract

The invention provides a method for producing a cold-rolled strip for a fire distinguisher. A hot rolling acid pickling raw material with the thickness of 2.5-5.0 mm and the width of 800-1550 mm is selected to be cold-rolled to be 0.7-2.0 mm, the total reduction rate is controlled to be 60-80%, a transverse thickness error of the strip keeps between -0.03 mm to +0 mm, and meanwhile a longitudinal thickness error keeps within 20 micrometers; the cold-rolled strip is placed into a bell-type annealing furnace with HPH, and heating, heat preserving, cooling with a hood, air cooling, water cooling, recrystallizing and annealing are carried out; finally, wet skin rolling and splitting shearing are carried out, and the cold-rolled strip for the fire distinguisher is obtained. A thickness error of the produced cold-rolled strip for the fire distinguisher is controlled to range from -0,03 mm to 0 mm, a thickness error in the width direction is within + / -20 micrometers, the hardness of the cold-rolled strip ranges from HRB35 to HRB65, the ductility A reaches 40-48%, and the yield strength is below 275 MPa.

Description

technical field [0001] The invention relates to the field of production and manufacture of cold-rolled precision steel strips, in particular to a method for producing cold-rolled steel strips for fire extinguishers. Background technique [0002] At present, most fire extinguisher manufacturers use ordinary steel strips as raw materials, that is, use common SPCC materials (that is, cold-rolled carbon steel strips) on the market that meet the national standard to make fire extinguisher cylinders. The cold-rolled carbon steel strip based on the national standard has a thickness deviation of 40-90 μm, and a thickness deviation of about 30 μm in the width direction, which cannot meet the uniformity of thickness and the reliability of the material performance required by the fire extinguisher steel cylinder, and cannot guarantee the safety of the fire extinguisher. The success of the blasting performance and hydraulic test resulted in a low pass rate and poor stability of the fire...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B1/28C22C38/04C22C38/06C22C38/16C21D8/02
Inventor 闻青山孙浩高传华路清祥刘丽吴冬梅程龙刘爱民胡国雄孙争取鞠传华
Owner JIGANG GRP