Production method of low-content-alloy plain carbon type steel plate of 3-8 mm thickness

A production method and low-alloy technology, applied in metal rolling, metal rolling, metal processing equipment, etc., can solve the problems of immature high-alloy steel plate welding technology, achieve excellent internal quality, high yield, and optimize product structure Effect

Inactive Publication Date: 2018-09-18
WUYANG IRON & STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Due to the influence of the welding technology of vacuum welding blank making, the stack rolling process can only be produced on low-alloy ordinary carbon steel plates at present. Due to the immature welding technology of high-alloy steel plates, it is temporarily in the experimental stage

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Steel plate production specification: thickness 3mm, thickness of rolled laminated plate after rolling is 12mm.

[0021] The production method of the low-alloy ordinary carbon steel plate in this embodiment includes billet making, rolling, and separation processes, and the specific process steps are as follows:

[0022] (1) Billet making process: stack four 12mm thick S355J2 steel plates for billet making, the butt joint of the steel plates is 0.5 mm, and the surface roughness of the billet is 3 μm; the surface of each steel plate is polished and polished, and a release agent is applied to isolate the The composition of the agent is: 6% ferric chloride, 15% magnesium chloride, and the rest is water; vacuum welding is used to make a composite billet, the welding speed is 80mm / s, and the welding line energy is 36KJ / cm 3 ;

[0023] (2) Rolling process: the hot rolling process is adopted during rolling, the rolling reduction is 9mm, and the S355J2 steel plate with a thickn...

Embodiment 2

[0027] Production specification of steel plate: thickness 4mm, thickness of rolled plate after rolling is 16mm.

[0028] The production method of the low-alloy ordinary carbon steel plate in this embodiment includes billet making, rolling, and separation processes, and the specific process steps are as follows:

[0029] (1) Billet making process: stack four Q345E steel plates with a thickness of 12 mm for billet making, the butt joint of the steel plates is 0.7 mm, and the surface roughness of the billet is 1 μm; the surface of each steel plate is polished and polished, and a release agent is applied to isolate the The composition of the agent is: 8% ferric chloride, 20% magnesium chloride, and the rest is water; vacuum welding is used to make a composite billet, the welding speed is 90mm / s, and the welding line energy is 50KJ / cm 3 ;

[0030] (2) Rolling process: the hot rolling process is adopted during rolling, the rolling reduction is 8mm, and the Q345E steel plate with a ...

Embodiment 3

[0034] Steel plate production specification: thickness 6mm, thickness of rolled laminated plate after rolling is 24mm.

[0035] The production method of the low-alloy ordinary carbon steel plate in this embodiment includes billet making, rolling, and separation processes, and the specific process steps are as follows:

[0036] (1) Billet making process: stack four 18mm thick Q345C steel plates for billet making, the butt joint of the steel plates is 1 mm, and the surface roughness of the billet is 3 μm; the surface of each steel plate is polished and polished, and the release agent is applied. The composition is: 10% ferric chloride, 20% magnesium chloride, and the rest is water; use vacuum welding composite billet, welding speed is 100mm / s, welding line energy is 55KJ / cm 3 ;

[0037] (2) Rolling process: the hot rolling process is adopted during rolling, the rolling reduction is 7mm, and the Q345C steel plate with a thickness of 24mm and a width of 3200mm is obtained after r...

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Abstract

The invention discloses a production method of a low-content-alloy plain carbon type steel plate of 3-8 mm thickness. The production method comprises the procedures of blank production, rolling and separation. According to the blank production procedure, the thickness of the steel plate ranges from 12 mm to 32 mm; the welding speed ranges from 80 mm/s to 120 mm/s; and the welding line energy ranges from 36 KJ/cm<3> to 60 KJ/cm<3>. When the plain carbon type low-content-alloy steel plate is produced through the method, the width can reach 3200 mm to the greatest extent; the yield is high; the cost is low; and rolling mill equipment does not need to be refitted. The process for producing the thin plate through combined means is adopted; dimensions can be adjusted flexibly according to orderrequirements to meet customer requirements; the method can adapt to markets demands for multiple varieties and the ultra-wide specification; the excellent steel plate which is good in surface, plate form and inherent quality can be obtained through rolling; and the production method can be widely applied to bridges, buildings, wind electricity and other manufacturing industries and is good in application prospect.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a production method of a 3-8mm thick low-alloy ordinary carbon steel plate. Background technique [0002] With the development of economic globalization and the continuous increase in the output of wide and heavy plates, the requirements for the quality of wide and heavy plates are becoming more and more stringent. Thin-gauge wide-thick plates are widely used due to the characteristics of less welding points during use and light weight under the same strength. However, in the production process of thin-gauge and wide-thick plates, high process technology control precision is required, and steel jamming, tail flicking, sickle bending, and wave shapes are prone to occur. In order to improve the dimensional accuracy and shape quality of thin-gauge wide-thick plates, various production enterprises have invested a lot of manpower and material resources in the research ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B1/38B21B47/00B21B47/02B21B47/04
CPCB21B1/38B21B47/00B21B47/02B21B47/04B21B2001/386B21B2201/06
Inventor 邓建军李建朝李杰刘丹龙杰王青王会岭赵喜伟袁平付振坡宋庆吉
Owner WUYANG IRON & STEEL
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