Hot rolling process of crossed steel

A special-shaped steel and cross-shaped technology, applied in the direction of metal rolling, can solve problems such as easy torsion and bending, unstable operation of rolled pieces, rolling defects, etc., achieving significant economic and social benefits, high cost, and low cost. Morph uniform effect

Inactive Publication Date: 2003-01-01
齐齐哈尔金河轧钢厂 +1
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] The special-shaped steel is a medium-sized special-shaped steel with a special and complex cross-sectional shape and an asymmetric structure. It is easy to twist and bend during rolling; at the same time, because its shape is cross-shaped, it will make the rolled piece unstable and easy to fall during operation. Steel, which brings greater difficulty to pass configuration; moreover, the legs and tails of this product are long, and if the design is improper, it is easy to cause full-length rolling defects
It can be seen that it is more difficult to realize the hot-rolled forming of the special-shaped steel

Method used

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  • Hot rolling process of crossed steel
  • Hot rolling process of crossed steel
  • Hot rolling process of crossed steel

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Embodiment Construction

[0012] According to the cross-sectional shape characteristics of the special-shaped steel, a new type of pass system is designed, which organically combines the two stages of rough rolling and finishing rolling. The pass system is composed of ordinary trapezoidal holes, bottom slot cap holes, convex trapezoidal holes and double wedge rail holes. Ordinary trapezoidal holes, convex trapezoidal holes and bottom groove hat-shaped holes are used in the rough rolling stage, and double-wedge rail-shaped holes are used in the finishing rolling stage. Ordinary trapezoidal holes and convex trapezoidal holes are used to solve the uneven deformation in rolling under high temperature conditions, and obtain metal blanks suitable for biting into bottom slot hat-shaped holes through their special shapes. The hat-shaped hole of the bottom groove is pressed laterally and vertically, and the metal billet required for the leg and tail is obtained by means of the rolled piece turning steel, vertic...

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Abstract

In the hot rolling process of crossed steel, systemic caliber configuration of open-train mill roller is utilized and the caliber system includes common trapezoid hole, cap-shaped under hole and raised trapezoid hole in the coarse rolling part as well as double-wedged caliber combination in precision rolling part. The hot rolling processing can form in once process and has homogeneous deformation, no need correction of rolled product and low cost. It is suitable for various mill with roller of 32-500 mm diameter.

Description

Technical field [0001] The invention relates to a hot-rolling method of special-shaped steel, which is particularly suitable for the hot-rolling method of cross-shaped special-shaped steel for railways. Background technique [0002] As my country's railway transportation enters the era of "speed-up and heavy load", the performance requirements for the overall and parts of railway vehicles are getting higher and higher. Among them, the performance of the brake beam, which is a key component of the braking system of railway vehicles, is Requirements have become one of the focuses of much attention. The main body of the original brake beam is welded by channel steel and round steel, which is prone to cracks, falling off and other problems that seriously affect driving safety during use. The other main body of the brake beam is machined and forged. This method can be used to obtain a break, but it cannot meet the actual needs of production due to shortcomings such as high cost, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B1/12
Inventor 林健椿孟德林
Owner 齐齐哈尔金河轧钢厂
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