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Technique for rolling figured steel for magnetic suspension train rail

A technology for magnetic levitation trains and special-shaped steel, applied in metal rolling, manufacturing tools, metal rolling, etc., can solve problems such as high cost, low efficiency, and complicated process, so as to improve production efficiency, meet mass production, and reduce costs Effect

Active Publication Date: 2008-07-09
LAIWU IRON & STEEL GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the limitation of the technical level of maglev control itself, the requirements for the various properties of the track itself (grain size, uniformity of structure, magnetic permeability, etc.) are very strict. Performance and mechanical properties put forward very high requirements, which lead to complex process, high cost and low efficiency in the production and processing of steel plates for magnetic levitation tracks, which seriously restrict its industrial application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Rectangular blanks are cold-loaded or hot-loaded into the furnace, heated to 1200-1230°C, and descaled by high-pressure water. In order to ensure the descaling effect, the descaling pressure is 10MPa. The rolling temperature is 1150-1180°C, and the final rolling temperature is 1000-1050°C. In order to ensure the uniformity of the structure of the product, a two-roll reversing mill is used for large deformation rolling at this stage. The maximum rolling force of the two-roll reversing mill is 8000KN. The amount of deformation should account for 65% of the total deformation. After the BD rolling is completed, the rough rolling billet is sent to the TM universal unit for continuous rolling through the conveying roller after the machine. two-roll rolling. The rolling force of the finish rolling is 10000KN, and the reduction accuracy is ±0.1mm; the starting rolling temperature is 800-850°C, and the final rolling temperature is 750-800°C, and the rest of the deformation is c...

Embodiment 2

[0029] Rectangular blanks are cold-loaded or hot-loaded into the furnace, heated to 1260-1280°C, and descaled by high-pressure water. In order to ensure the descaling effect, the descaling pressure is 20MPa. Rolling at 1180-1200°C, and final rolling temperature at 950-1000°C. In order to ensure the uniformity of the structure of the product, a two-roll reversible rolling mill is used for large deformation rolling at this stage. The maximum rolling force of the two-roll reversing rolling mill is 10000KN. The rolling deformation should account for 85% of the total deformation. After the BD rolling is completed, the rough rolling billet is sent to the TM universal unit for continuous rolling through the conveying roller after the machine. two-roll rolling. The rolling force of the finishing rolling is 13000KN, and the rolling precision is ±0.1mm; the starting rolling temperature is 850-900°C, and the final rolling temperature is 800-850°C, and the rest of the deformation is comp...

Embodiment 3

[0033] Rectangular blanks are cold-loaded or hot-loaded into the furnace, heated to 1240-1260°C, and descaled by high-pressure water. In order to ensure the descaling effect, the descaling pressure is 30MPa. The rolling temperature is 1210-1240°C, and the final rolling temperature is 1050-1100°C. In order to ensure the uniformity of the structure of the product, a two-roll reversible rolling mill is used for large deformation rolling at this stage. The maximum rolling force of the two-roll reversing rolling mill is 9000KN. The rolling deformation should account for 70% of the total deformation. After the BD rolling is completed, the rough rolling billet is sent to the TM universal unit for continuous rolling through the conveying roller after the machine. two-roll rolling. The rolling force of the finish rolling is 12000KN, and the reduction accuracy is ±0.1mm; the starting rolling temperature is 900-1000°C, and the final rolling temperature is 750-800°C. The rest of the defo...

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PUM

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Abstract

The invention belongs to the technology field of metal thermal treatment, which relates to the rolling technology of deformed steel used for a maglev train rail. The invention comprises the procedures in turn of rough rolling, finishing rolling, coolant-controlling and straightening, which is characterized in that two reversible mills rolling is adopted for rough rolling and the maximum rolling force of a two reversible mill is 8000 to 10000KN. And the rolling deformation should account for 60 to 90 per cent of total deformation. Three-stand universal continuous rolling line with high rolling force and high accuracy is adopted for finishing rolling to realize mixing roll under universal mode. The invention can merely use large H-shaped hot- rolling production line to produce finished products and does not require thermal treatment and machining process, with the result that the cost can be greatly reduced and the requirement of mass production can be fully satisfied.

Description

technical field [0001] The invention belongs to the technical field of metal thermal processing, and relates to a rolling process method of special-shaped steel for magnetic levitation train tracks. Background technique [0002] In 1969, the world began to study maglev trains. After years of research and practice, the medium and low speed maglev system has accumulated a lot of successful experience. In terms of research and application of medium and low speed maglev, the most representative one is the Japanese HSST system. The technical structure of HSST first appeared in Germany. After nearly 30 years of research, Japan has successively developed 7 HSST models, and developed it to the H100 series in Nagoya. The system is running successfully. Nagoya Eastern Hills Line, the main line is 8.9km long, of which 1.4km is an underground line and the rest is an elevated line. There are nine stations. The minimum driving interval is 6 minutes during peak hours and 10 minutes during...

Claims

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Application Information

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IPC IPC(8): B21B1/085B21B37/58B21B37/74B21B27/02B21B45/08C21D9/70C21D11/00
CPCB21B1/085C21D8/021C21D8/0226C21D8/0236C21D8/0252C21D9/04C21D11/00C21D11/005
Inventor 董杰曲为壮刘福宁霍喜伟杨栋赵传东冯伟袁鹏举张婕马振宏殷德全郑逢辰郑希增刘强
Owner LAIWU IRON & STEEL GRP
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