Production control method of narrow strips for cutting dies

A production control method and narrow-strip steel technology, applied in the field of metallurgy, can solve problems such as small-scale enterprises, single varieties, and poor steel quality, and achieve the effects of improving load capacity, improving production efficiency, and good bending performance

Active Publication Date: 2014-10-08
NANJING IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] There are only more than 30 hot-rolled narrow strip steel production lines in my country, with an annual production capacity of about 6 million tons of narrow strip steel. Although the production of narrow strip steel has made a lot of progress in recent years, there are still many unsatisfactory aspects. Performances such as: poor steel quality and single variety; there are still many rolling mills with outdated equipment, narrow-band integrated production enterprises, sintering, coking ironmaking, steelmaking, continuous casting, and hot-rolled narrow-strip steel supporting production. High consumption, serious pollution

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  • Production control method of narrow strips for cutting dies
  • Production control method of narrow strips for cutting dies
  • Production control method of narrow strips for cutting dies

Examples

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Effect test

Embodiment 1

[0037] This example provides a method for controlling the production of narrow strip steel for die cutting. This method produces high-strength narrow strip steel for die cutting through temperature control, controlled rolling, and improving the backing plate structure of the lower rollers of the finishing mill. The specific operations are as follows :

[0038] (1) Temperature control process

[0039] (1) First send the stainless steel billet with a diameter of 500mm and a thickness of 37mm into the heating furnace for preheating, and the temperature in the preheating section is controlled at 600°C;

[0040] (2) After the internal and external temperature of the preheated stainless steel billet in step (1) is the same, it is sent to the heating section for heating. The temperature is 1250°C, the temperature of the lower heating end firing section II is 1100°C, and the position of the temperature of the lower heating end firing section I is between the temperature of the lower ...

Embodiment 2

[0053] This example provides a method for controlling the production of narrow strip steel for die cutting. This method produces high-strength narrow strip steel for die cutting through temperature control, controlled rolling, and improving the backing plate structure of the lower rollers of the finishing mill. The specific operations are as follows :

[0054] (1) Temperature control process

[0055] (1) First send the stainless steel billet with a diameter of 500mm and a thickness of 37mm into the heating furnace for preheating, and the temperature in the preheating section is controlled at 700°C;

[0056] (2) After the internal and external temperature of the preheated stainless steel billet in step (1) is the same, it is sent to the heating section for heating. The temperature is 1200°C, the temperature of the lower heating end firing section II is 1200°C, and the position of the temperature of the lower heating end firing section I is between the temperature of the lower ...

Embodiment 3

[0068] This example provides a method for controlling the production of narrow strip steel for die cutting. This method produces high-strength narrow strip steel for die cutting through temperature control, controlled rolling, and improving the backing plate structure of the lower rollers of the finishing mill. The specific operations are as follows :

[0069] (1) Temperature control process

[0070] (1) First send the stainless steel billet with a diameter of 500mm and a thickness of 37mm into the heating furnace for preheating, and the preheating temperature is controlled at 750°C;

[0071] (2) After the internal and external temperature of the preheated stainless steel billet in step (1) is the same, it is sent to the heating section for heating. The temperature of I is 1300°C, the temperature of lower heating end firing section II is 1150°C, and the position of the temperature of lower heating end burning section I is between the temperature of lower heating side burning ...

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Abstract

The invention discloses a production control method of narrow strips for cutting dies. According to the method, the preheating section temperature is controlled to be in a range of 500-750 DEG C, the upper heating section temperature is controlled to be in a range of 1150-1220 DEG C, the lower heating side firing section temperature is controlled to be in a range of 1190-1290 DEG C, the lower heating end firing section I temperature is controlled to be in a range of 1200-1300 DEG C, the lower heating end firing section II temperature is controlled to be in a range of 1100-1200 DEG C, the soaking section temperature is controlled to be in a range of 1150-1230 DEG C, the rough machine initial rolling temperature is controlled to be in a range of 1060-1160 DEG C in a controlled rolling process, a continuous rolling unit initial rolling temperature is controlled to be in a range of 1000-1050 DEG C, the final rolling temperature is not higher than 900 DEG C, the curling temperature is not higher than 650 DEG C, and an intermediate rolling unit and a finish rolling unit adopt plain roller rolling machines, so that defects of coarse grains, poor bending performance and the like cannot occur easily during rolling, the product quality is guaranteed, the production efficiency is improved, and the narrow strips which are good in bending performance and anti-fatigue performance and used for the high-strength cutting dies are produced.

Description

technical field [0001] The invention belongs to the field of metallurgy and relates to a production method of narrow strip steel, in particular to a production control method of narrow strip steel for die cutting. Background technique [0002] Strip steel with a width less than 600mm is called narrow strip steel. At present, there are few hot-rolled narrow-strip steel production lines with a bandwidth of 205-400mm in China, and this width is the main raw material for 65, 80, and 100mm straight seam welded pipes. At present, most welded pipe factories use wide-band steel slitting for production, and the cost of producing wide-band is high, and the metal loss of slitting is about 5%. From the perspective of product thickness, the thickness of narrow strip steel in the domestic market so far is above 2.0mm (generally 2.5- 4.0mm); for narrow strip steel below 2.0mm, on the one hand, it relies on imported thin wide strip steel for slitting, and on the other hand, it uses thick s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B37/74B21B37/46
Inventor 颜建福仇必宁李军俞日军
Owner NANJING IRON & STEEL CO LTD
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