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Carbon segregation control method for continuous casting round billet for vehicle wheel

A continuous casting round billet and control method technology, applied in the field of train wheel steel production, can solve the problems of unsteady control of wheel homogenization, unstable quality, etc., to improve solidification structure, improve composition uniformity, and reduce smelting costs Effect

Inactive Publication Date: 2017-04-26
JIANGSU LIHUAI IRON AND STEEL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, after years of development, domestically produced wheels have made great progress. The raw material of steel-rolled integral wheels has gradually changed from die-casting ingots to continuous casting round billets. The production efficiency has improved, but the quality is not too stable, and the homogenization of wheels cannot stability control

Method used

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  • Carbon segregation control method for continuous casting round billet for vehicle wheel
  • Carbon segregation control method for continuous casting round billet for vehicle wheel

Examples

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Effect test

Embodiment 1

[0028] R14m arc round billet continuous casting machine in a steel factory produces wheel steel CL60Φ380mm continuous casting round billet, production process parameters: superheat 25°C, casting speed 0.50m / min, stirring parameters of M-EMS electromagnetic stirrer: 250A / 2.5 Hz, the stirring parameter of S-EMS electromagnetic stirrer is: 350A / 9Hz (alternate), the stirring parameter of F-EMS electromagnetic stirrer is: 400A / 7Hz, the parameter of high-frequency pulse oscillator is 300A / 200Hz. Use a Φ8mm alloy drill bit to sample cuttings at 5 points from the surface, 10mm, 1 / 8R, 1 / 4R, 1 / 2R, and 3 / 4R, on the low-magnification sample in the transverse direction of the round billet, and use an infrared carbon and sulfur analyzer to measure the carbon content. . After analysis, from the surface 10mm to 3 / 4R, the carbon range is within 0.025%, see Table 1. The carbon segregation of the round billet is obviously better than that of the traditional mold casting billet, and the continuo...

Embodiment 2

[0033]R14m curved round billet continuous casting machine in a steel factory produces wheel steel AAR-C Φ380mm continuous casting round billet. Production process parameters: superheat degree 22°C, casting speed 0.50m / min, stirring parameters of M-EMS electromagnetic stirrer are: 280A / 2.5Hz, the stirring parameter of S-EMS electromagnetic stirrer is: 350A / 9Hz (alternate), the stirring parameter of F-EMS electromagnetic stirrer is: 400A / 7Hz, the parameter of high frequency pulse oscillator is 300A / 200Hz. Use a Φ8mm alloy drill bit to sample cuttings at 5 points from the surface, 10mm, 1 / 8R, 1 / 4R, 1 / 2R, and 3 / 4R, on the low-magnification sample in the transverse direction of the round billet, and use an infrared carbon and sulfur analyzer to measure the carbon content. . After analysis, from the surface 10mm to 3 / 4R, the carbon range is within 0.022%, see Table 2.

[0034] Table 2

[0035]

[0036] Note: R is the radius.

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Abstract

The invention discloses a carbon segregation control method for a continuous casting round billet for a vehicle wheel. The carbon segregation control method includes the following steps that the floating range of the content of chemical components of steel and the corresponding target content of the components is reduced; the superheat degree of molten steel during casting is reduced; and various compound stirring manners are adopted for stirring while casting is conducted. It can be known from the method that the difference value range of the practical content of the chemical components in molten steel and the target content is reduced, deviation of the chemical components of molten steel in the last melt and the next melt in the continuous casting process can be reduced, and therefore the chemical components of tundish melting in 80% or more of the melts can be basically the same, the actual content of C, the actual content of Si, the actual content of Mn, the actual content of Cr and the actual content of V are controlled in the corresponding range of the target content + / - 0.01%, and component evenness on the cross section of the medium-and-high-carbon wheel steel continuous casting round billet can be better controlled.

Description

technical field [0001] The invention relates to the field of train wheel steel production, in particular to a method for controlling carbon segregation of continuous casting round billets for wheels. Background technique [0002] According to my country's "medium and long-term railway network plan", "railway 13th five-year plan" and the gradual implementation of the "one belt and one road" strategy, China's railway will maintain rapid development. During the "13th Five-Year Plan" period, the operating mileage of my country's high-speed railways will increase from 19,000 kilometers at the end of 2015 to 30,000 kilometers, covering more than 80% of large cities. China's high-speed rail manufacturing technology has also gradually gained worldwide recognition. It initially won the bid to build a 770-kilometer high-speed rail project from Moscow-Kazan-Ekaterinburg. In the future, countries such as Thailand, Brazil, and Peru will continue to cooperate in high-speed rail projects. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/18B22D11/114B22D11/116C21C7/00
CPCB22D11/114B22D11/116B22D11/18C21C7/0006
Inventor 张洪才石可伟许正周林鹏杨勰
Owner JIANGSU LIHUAI IRON AND STEEL CO LTD
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