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Method for controlling process for cooling hot-rolled ultra low carbon steel wire rod after rolling

A technology of ultra-low carbon steel and cooling process, which is applied in the field of steel rolling, can solve the problems of abrasive tool loss that affect the drawing effect, achieve the effects of reducing the probability of brittle fracture during drawing, improving the yield and production efficiency, and improving the efficiency of processing and use

Active Publication Date: 2011-09-21
SHOUGANG CORPORATION
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The level of spinning temperature affects the grain size of the structure. Generally, the lower the spinning temperature, the finer the grains and the higher the tensile strength. For hot-rolled ultra-low carbon steel wire rods, too high tensile strength will Affect the drawing effect and the loss of abrasive tools

Method used

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  • Method for controlling process for cooling hot-rolled ultra low carbon steel wire rod after rolling
  • Method for controlling process for cooling hot-rolled ultra low carbon steel wire rod after rolling

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Embodiment Construction

[0011] The invention can be adopted in the production of ultra-low carbon steel wire rods in high-speed wire rod factories.

[0012] By adopting the cooling control process of the present invention, the SWRM6 wire rod with the specification of ￠6.5mm meeting the requirements is mass-produced in Shougang. The spinning temperature is controlled at 920±20°C; the speed of each roller table in the heat dissipation and cooling section (unit: m / s):

[0013] 0.36-0.38-0.39-0.40-0.43-0.44-0.46-0.50-0.50-0.50-0.50-0.50-0.50;

[0014] All the fans are turned off, and the insulation covers are all turned on, so that the wire rod is cooled evenly. Control the ferrite grain size of ultra-low carbon steel wire rod at 20-40μm, the content of tertiary cementite ≤ 2%, the tensile strength ≤ 330Mpa, the surface shrinkage ≥ 80%, and the poor performance of the same ring ≤ 20Mpa. It meets the requirements of users and national standards, and is used for processing and producing high-end products...

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Abstract

The invention discloses a method for controlling a process for cooling a hot-rolled ultra low carbon steel wire rod after rolling and belongs to the technical field of steel rolling. Spinning temperature is controlled to be 900 to 950 DEG C; the speed of a roller bed of a cooling section is reasonably adjusted, and distance between rings and the cooling speed are controlled by controlling the speed of the roller beds of all sections; and fans are all switched off, heat insulation covers are all opened, the grain size of ultra-low carbon steel wire rod ferrite is controlled to be 20 to 40 mu m, tertiary cementite content is less than or equal to 2 percent, tensile strength is less than or equal to 330 MPa, area reduction is more than or equal to 80 percent, and the performance difference of the same ring is less than or equal to 20 MPa. Processing and using efficiency of a user is greatly improved, the possibility of drawing brittle fracture is reduced, and yield and production efficiency are improved.

Description

technical field [0001] The invention belongs to the technical field of steel rolling, and in particular provides a post-rolling cooling process control method for hot-rolled ultra-low-carbon steel wire rods, which is mainly used in the production of hot-rolled ultra-low-carbon steel wire rods with specifications of ￠5.5-￠16mm. Background technique [0002] Hot-rolled ultra-low carbon wire rod is mainly used for processing and manufacturing high-end products such as copper-coated steel wire and galvanized steel wire for communication and electronic information industries. It requires very high plastic index, and has certain tensile strength and cleaning performance. This requires that the wire rod structure is mainly ferrite, the grain size is 20-40μm, the tertiary cementite is as little as possible, and the fluctuation of the mechanical properties of the rod is as small as possible. [0003] The spinning temperature and post-rolling cooling rate determine the structure and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B37/76
Inventor 王坤王立峰周德光李永东王全礼王猛孙齐松陈涛丁宁吕迺冰罗志俊佟倩
Owner SHOUGANG CORPORATION
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