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Stelmor cooling control technique

A process method and process technology, applied in the field of Stelmore controlled cooling process, can solve problems such as unsatisfactory application effect, achieve excellent drawing performance and improve the effect of tensile strength

Inactive Publication Date: 2011-08-31
武钢集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There is also CN1603021 disclosed "High Line Rolling Mill Stelmo Line Gas Spray Cooling Equipment and Method", etc., but the actual application effect of these existing methods is not ideal

Method used

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Embodiment Construction

[0021] The process route for producing SWRH82A wire rod for Φ11mm rope-making steel wire is as follows: 100-ton top-bottom double-blown converter—LF refining outside the furnace—continuous casting billet—high wire rolling—Styermore controlled cooling process. Chemical composition of wire rod: C 0.79-0.86%, Mn0.30-0.60%, Si 0.15-0.35%, wire rod start rolling temperature: 950-1100°C, finish rolling temperature: 900-1050°C.

[0022] Embodiment 1 of the Stelmore controlled cooling process of the present invention includes an air cooling process and a water cooling process.

[0023] In the water cooling process:

[0024] Such as figure 1 As shown, 1-14 in the figure is No. 1-14 water spray nozzle, and the direction of the arrow is the water spray direction and the wire rod running direction (rolling direction).

[0025] No. 1-7 water spray nozzles spray water from the top of the cooling roller table to the wire rod walking on the cooling roller table, and No. 8-14 water spray noz...

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Abstract

The invention relates to a stelmor cooling control technique comprising a wind cooling process and a water cooling process. In the water cooling process, in at least one water cooling section, each water-spraying nozzle sprays water to the wires walking on a cooling roller table at the spraying angle of 15-25 degrees in the alternating arrangement way of 85-95 degrees, wherein the spraying angle is the angle between a water-spraying nozzle axis and a wire walking direction; and in the wind cooling process, a wind-blowing nozzle blows wind to the wires walking on a cooling roller table from the directions of up and down, left and right, of the cooling roller table. The stelmor cooling control technique can effectively destroy the cooling state of a film on the surface of a steel bar, form a nuclear cooling state of directly contacting with the steel, can reduce or suppress the precipitation of reticular tissues, and ensures that the main control tissue is a homogeneous sorbite tissue, so as to obtain good drawing performance.

Description

technical field [0001] The invention relates to a production process of medium and high carbon wire rods, in particular to a Stelmore controlled cooling process in the production process of medium and high carbon wire rods. Background technique [0002] Before the present invention, similar medium and high carbon steel wires were generally produced by the Steermore controlled cooling process, but the method of increasing the tensile strength was mainly by increasing the carbon equivalent or adding alloying elements that can increase the strength, such as the American Materials and Testing The 1074MW and 1080V steels in the association standard ASTM A510 require a content of Cr or V alloys close to 0.15%. Although the tensile strength is improved, the plasticity indicators such as elongation and area shrinkage have decreased, and adding Alloying elements are very expensive. Another example is the ML35CrMo and ML40Cr steels in the national standard GB 6478. The required Cr al...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B45/02B21B1/16
Inventor 练瑞民罗德信周勇桂美文覃之光蒋跃东沈金龙桂江兵夏艳花
Owner 武钢集团有限公司
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