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High-strength and high-elongation cold-rolled packing steel strip and manufacturing method thereof

A technology with high elongation and manufacturing method, which is applied in the field of steel manufacturing and processing to achieve the effects of excellent toughness, high strength, and increased strength and hardness

Inactive Publication Date: 2016-11-09
TANGSHAN IRON & STEEL GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But at the same time, it also caused homogeneous competition and price wars

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The chemical composition and mass fraction of the high-strength and high-elongation cold-rolled strapping steel strip produced in this example are: C: 0.21%, Mn: 1.70%, Si: 0.12%, S: 0.007%, P: 0.0:15 %, Al: 0.035%, N: 0.0050%, and the rest are iron and unavoidable impurities.

[0033] Its manufacturing method is carried out according to the following process:

[0034] 1) Converter smelting: Allocation and addition of alloys according to the target composition.

[0035] 2) LF furnace refining: LF furnace refining static blowing time is 10 minutes.

[0036] 3) Continuous casting: The continuous casting process adopts the whole process of argon protection pouring, the tundish slag is cleaned before pouring the steel type, and the tundish covering agent is added again to ensure that the covering agent has the ability to absorb inclusions, and the superheat of molten steel is 25°C , stable pulling speed 1.6m / min.

[0037] 4) Billet heating: the heating temperature is 115...

Embodiment 2

[0046] The chemical composition and mass fraction of the high-strength and high-elongation cold-rolled packing steel strip produced in this embodiment are: C: 0.20%, Mn: 1.80%, Si: 0.15%, S: 0.005%, P: 0.012%, Al: 0.040%, N: 0.0040%, and the rest are iron and unavoidable impurities.

[0047] Its manufacturing method is carried out according to the following process:

[0048] 1) Converter smelting: Allocation and addition of alloys according to the target composition.

[0049] 2) LF furnace refining: LF furnace refining static blowing time is 9 minutes.

[0050] 3) Continuous casting: The continuous casting process adopts the whole process of argon protection pouring, the tundish slag is cleaned before pouring the steel type, and the tundish covering agent is re-added to ensure that the covering agent has the ability to absorb inclusions, and the superheat of molten steel is 26 °C , stable pulling speed 1.7m / min.

[0051] 4) Billet heating: the heating temperature is 1155°C....

Embodiment 3

[0060] The chemical composition and mass fraction of the high-strength and high-elongation cold-rolled packing steel strip produced in this embodiment are: C: 0.23%, Mn: 1.50%, Si: 0.13%, S: 0.015%, P: 0.014%, Al: 0.045%, N: 0.0045%, and the rest are iron and unavoidable impurities.

[0061] Its manufacturing method is carried out according to the following process:

[0062] 1) Converter smelting: Allocation and addition of alloys according to the target components.

[0063] 2) LF furnace refining: LF furnace refining static blowing time 10.5 minutes.

[0064] 3) Continuous casting: The continuous casting process adopts the whole process of argon protection pouring, the tundish slag is cleaned before pouring the steel type, and the tundish covering agent is added again to ensure that the covering agent has the ability to absorb inclusions, and the superheat of molten steel is 21°C , stable pulling speed 1.8m / min.

[0065] 4) Billet heating: the heating temperature is 1160°C...

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Abstract

The invention provides a high-strength and high-elongation cold-rolled packing steel strip and a manufacturing method thereof. The steel strip is prepared from following chemical components in percentage by mass: 0.20-0.23% of C, 1.50-1.80% of Mn, smaller than or equal to 0.15% of Si, smaller than or equal to 0.015% of S, smaller than or equal to 0.025% of P, larger than or equal to 0.035% of Al, smaller than or equal to 0.0050% of N and the balance iron and inevitable impurities. The manufacturing method includes the procedures of converter smelting, LF furnace refining, continuous casting, casting blank heating, hot rolling, laminar cooling, reeling, acid pickling, cold rolling and annealing blueing. The procedure of hot rolling includes the steps of coarse rolling and fine rolling. According to the method, Nb, Ti, V and other precious alloy elements are not added, and the production cost is effectively reduced; a ferrite matrix is subjected to solution strengthening through a certain manganese content, the strength of steel is guaranteed, and the toughness of the steel is not reduced; and a hot rolling controlled rolling and controlled cooling process is adopted and combined with a follow-up cold rolling hardening process and a low-temperature annealing blueing process, and it is guaranteed that the final product has high strength (tensile strength is larger than or equal to 980 MPa) and has good processing performance (elongation A30 is larger than or equal to 12%).

Description

technical field [0001] The invention belongs to the technical field of steel manufacturing and processing methods, and in particular relates to a high-strength and high-elongation cold-rolled packing steel strip and a manufacturing method thereof. Background technique [0002] Packaging steel strip is a packaging material made of cold-rolled steel strip of a certain material through annealing and bluing, slitting and slitting processes. Because it is a recyclable and environmentally friendly material, coupled with good strength, toughness, and corrosion resistance It can be widely used in steel, aluminum, chemical fiber, cotton spinning, tobacco, paper industry, metal can making and other industries. [0003] With the gradual acceleration of the process of economic internationalization, my country's strapping steel belt industry has experienced a stage of rapid development and has become an important part of China's manufacturing field. The development trend of strapping st...

Claims

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Application Information

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IPC IPC(8): C21D8/02C22C38/02C22C38/04C22C38/06
CPCC22C38/04C21D8/0226C21D8/0236C21D8/0247C21D8/0278C22C38/001C22C38/02C22C38/06
Inventor 齐建群杨晓江于世川杜雁冰杜明山张琳梅淑文杜洪波张杰王维东白金杨孟根巴根刘庆永贺宗晶艾兵权
Owner TANGSHAN IRON & STEEL GROUP
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