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Continuous stainless steel strip production method

A production method and technology for stainless steel strips, applied in the metallurgical field, can solve problems such as huge factory investment, and achieve the effect of bright and straight strip surface, increased plasticity, and reduced annealing

Active Publication Date: 2016-12-21
WUHAN QIAN YE ENG TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method requires repeated storage and transportation, repeated winding and unwinding, multiple annealing and pickling, repeated configuration of equipment, and huge investment in the factory.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1) Continuous uncoiling, straightening and welding of hot-rolled SUS201 steel coils without annealing and pickling, so that the steel coils are spliced ​​into a continuous strip;

[0024] 2) The steel strip is continuously cold-rolled for 3 passes through three 18-high rolling mills, and the total reduction rate is controlled to be 50%;

[0025] 3) The strip steel after rolling is subjected to continuous annealing treatment, a total of four stages:

[0026] Preheating stage: the strip rises from the natural temperature to 380°C, and the preheating time is 18s;

[0027] Heating stage: the strip steel is heated from 380°C to 1110°C, and the heating time is 38s;

[0028] Heat preservation stage: the strip temperature is maintained at 1110°C, and the heat preservation time is 7s;

[0029] Cooling stage: The strip first enters the air cooling section, the cooling time is 7s, the temperature drops to 500°C, then enters the water mist cooling section, the cooling time is 7s,...

Embodiment 2

[0037] 1) Continuous uncoiling, straightening and welding of hot-rolled SUS201 steel coils without annealing and pickling, so that the steel coils are spliced ​​into a continuous strip;

[0038] 2) The strip is continuously cold-rolled for 2 passes through an eighteen-high rolling mill, and the total reduction rate is controlled to be 42%;

[0039] 3) The strip steel after cold rolling is subjected to continuous annealing treatment, a total of four stages:

[0040] Preheating stage: the strip rises from the natural temperature to 360°C, and the preheating time is 20s;

[0041] Heating stage: the strip steel is heated from 360°C to 1120°C, and the heating time is 40s;

[0042] Heat preservation stage: the strip temperature is maintained at 1120°C, and the heat preservation time is 8s;

[0043] Cooling stage: The strip steel enters the air cooling section, the cooling time is 9s, the temperature drops to 500°C, then enters the water mist cooling section, the cooling time is 9s...

Embodiment 3

[0051] 1) Continuous uncoiling, straightening, and welding of hot-rolled SUS304 steel coils without annealing and pickling, so that the steel coils are spliced ​​into a continuous strip;

[0052] 2) The steel strip is continuously cold-rolled for 3 passes through an eighteen-high rolling mill, and the total reduction rate is controlled to be 55%;

[0053] 3) The strip steel after cold rolling is subjected to continuous annealing treatment, a total of four stages:

[0054] Preheating stage: the strip rises from the natural temperature to 400°C, and the preheating time is 25s;

[0055] Heating stage: the strip steel is heated from 400°C to 1140°C, and the heating time is 50s;

[0056] Heat preservation stage: the strip temperature is maintained at 1140°C, and the heat preservation time is 9s;

[0057] Cooling stage: The strip steel enters the air cooling section, the cooling time is 10s, the temperature drops to 400°C, then enters the water mist cooling section, the cooling ti...

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Abstract

The invention discloses a continuous stainless steel strip production method. According to the continuous stainless steel strip production method, continuous uncoiling, straightening and welding are conducted on a hot rolled steel roll which is not subjected to annealing and acid pickling; then, cold rolling, annealing and rust removal are conducted; and finally, flattening and coiling are conducted. Compared with an existing method, the continuous stainless steel strip production method is simple in process step, the production cost is effectively reduced, a crystalline phase tissue, produced during rolling and damaged by plastic deformation, of a steel strip can be effectively repaired, the crystal lattice tissue is refined, the grain size of materials is controlled, the rolling deformation stress is eliminated, plasticity of the steel strip is increased, and the surface of the steel strip is brighter and straighter.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a continuous production method for stainless steel strips. Background technique [0002] In the processing technology of strip production, the process flow design determines the product positioning, output, and factory investment planning of the production line. At present, it is generally used in my country and even in the world that the hot-rolled coils are first annealed and pickled, and then the white coils are produced. A process that produces finished or semi-finished products. This method requires multiple storage and transportation, repeated winding and unwinding, multiple annealing and pickling, repeated configuration of equipment, and huge investment in the factory. Contents of the invention [0003] The object of the present invention is to provide a kind of continuous production method of stainless steel strip for above-mentioned defect. [0004] Me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D8/02C21D1/26C21D9/52C25F1/06C23G1/08
CPCC21D1/26C21D8/0236C21D9/52C23G1/086C25F1/06
Inventor 李军肖剑波朱鹏飞魏晶
Owner WUHAN QIAN YE ENG TECH CO LTD
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