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Method for producing small-specification C72DA rubber tube steel wire at high speed based on double modules

A high-speed production and small-size technology, applied in the field of steel wire production, can solve the problems of increasing drawing difficulty, increasing production cost, and reducing product quality, and achieve the effect of increasing production rhythm, increasing production speed, and increasing production speed

Inactive Publication Date: 2019-07-09
RIZHAO STEEL HLDG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the domestic production of C72DA rubber hose steel wire is mainly rolled by a finishing mill. During the production process, the rolling speed is slow, the size fluctuates greatly, and there are defects such as large ellipticity and coarse grains. These problems directly affect the subsequent drawing production of wire rod products. , which greatly reduces the product quality, but also increases the difficulty of drawing, increases the broken wire rate, and increases the production cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Select raw materials, wherein the raw materials include: C0.72%; Si0.21%; Mn0.52%; P0.012%; S0.008%; Cr0.020%; Ni0.0112%; Cu0.0152%; Al0.0163%; As≤0.0014%, the rest is Fe element.

[0029] The raw materials are smelted in the converter and LF furnace in turn;

[0030] Continuous casting is produced at a constant casting speed of 2.0m / min, and the billet size is 163mm×163mm; the temperature of the soaking section of the heating furnace is 1080°C, the entrance temperature of rough rolling is 980°C, the entrance temperature of finish rolling is 930°C, and the spinning temperature is 880°C; The rolling speed is 108m / s; the fan is turned on 1~6#, and the air volume is 80%; the heat preservation cover is fully opened; s, collecting reels to collect into coils; rough rolling type 75.5mm×75.5mm, middle rolling type 34.5mm×34.5mm, pre-finishing type 16.9mm×16.8mm, finishing type 7.75mm×7.7mm.

[0031] Finished product size: The rolling specification is 5.5mm, the finished prod...

Embodiment 2

[0034] Select raw materials, wherein the raw materials include: C0.72%; Si0.20%; Mn0.51%; P0.010%; S0.010%; Cr0.022%; Ni0.0110%; Cu0.0154%; Al0.0160%; As≤0.0010%, the rest is Fe element.

[0035] The raw materials are smelted in the converter and LF furnace in turn;

[0036] Continuous casting is produced at a constant casting speed of 2.0m / min, and the billet size is 163mm×163mm; the temperature of the soaking section of the heating furnace is 1085°C, the entrance temperature of rough rolling is 983°C, the entrance temperature of finish rolling is 935°C, and the spinning temperature is 875°C; The rolling speed is 108m / s; the fan is turned on 1~6#, and the air volume is 80%; the heat preservation cover is fully opened; s, collecting reels to collect into coils; rough rolling type 75.5mm×75.5mm, middle rolling type 34.5mm×34.5mm, pre-finishing type 16.9mm×16.8mm, finishing type 7.75mm×7.7mm.

[0037] Finished product size: The rolling specification is 5.5mm, the finished prod...

Embodiment 3

[0040] Select raw materials, wherein raw materials include: C0.71%; Si0.19%; Mn0.55%; P0.012%; S0.010%; Cr0.018%; Ni0.0110%; Cu0.0154%; Al0.0164%; As≤0.0012%, the rest is Fe element.

[0041] The raw materials are smelted in the converter and LF furnace in turn;

[0042] Continuous casting is produced at a constant casting speed of 2.0m / min, and the billet size is 163mm×163mm; the temperature of the soaking section of the heating furnace is 1080°C, the entrance temperature of rough rolling is 988°C, the entrance temperature of finish rolling is 930°C, and the spinning temperature is 880°C; The rolling speed is 108m / s; the fan is turned on 1~6#, and the air volume is 80%; the heat preservation cover is fully opened; s, collection rolls are collected into rolls;

[0043] The rough rolling type is 75.5mm×75.5mm, the intermediate rolling type is 34.5mm×34.5mm, the pre-finishing type is 16.9mm×16.8mm, and the finishing type is 7.75mm×7.7mm.

[0044] Finished product size: The ro...

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Abstract

The invention belongs to the technical field of steel wire production, and relates to a method for producing a small-specification C72DA rubber tube steel wire at a high speed based on double modules.The small-specification C72DA rubber tube steel wire is prepared from the components in percentage by weight: 0.70%-0.74% of C, 0.15%-0.25% of Si, 0.50%-0.60% of Mn, less than or equal to 0.018% of P, less than or equal to 0.010% of S, less than or equal to 0.05% of Cr, less than or equal to 0.05% of Ni, less than or equal to 0.05% of Cu, less than or equal to 0.05% of Al, less than or equal to 0.03% of As, and the balance of Fe and inevitable impurities. According to the method, demands of high performance requirements, stable properties, small dimensional deviation and good product drawingproperty can be met; and the technological process adopts double module rolling, the requirement for improving the product dimensional precision and the surface quality is met, the production speed isgreatly increased, the production cost is lowered, energy is saved, emission of carbon dioxide is reduced, and the method belongs to low-cost manufacturing.

Description

technical field [0001] The invention belongs to the technical field of steel wire production, and relates to a method for high-speed production of small-sized C72DA rubber hose steel wires based on double modules. Background technique [0002] At present, the domestic production of C72DA rubber hose steel wire is mainly rolled by a finishing mill. During the production process, the rolling speed is slow, the size fluctuates greatly, and there are defects such as large ellipticity and coarse grains. These problems directly affect the subsequent drawing production of wire rod products. , greatly reduces the product quality, but also increases the difficulty of drawing, increases the broken wire rate, and increases the production cost. [0003] C72DA rubber hose steel wire belongs to YB / T 170.2-2000 non-alloy steel wire rod for wire making. Grade A Mn content requires 0.50-0.80%, high surface quality requirements, high strength, high ductility, and high sorbite rate for wire ro...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/04C22C38/08C22C38/06C22C38/40C21D8/06
CPCC21D8/065C21D2211/005C21D2211/009C22C38/02C22C38/04C22C38/06C22C38/08C22C38/40
Inventor 吕文广冯启鹏黄效东沈克非王福良严进宝张军利余坤洋朱传清袁诚康天召李永发
Owner RIZHAO STEEL HLDG GROUP
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