CN103273287A - Method for producing heavy rails - Google Patents

Method for producing heavy rails Download PDF

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Publication number
CN103273287A
CN103273287A CN2013101915925A CN201310191592A CN103273287A CN 103273287 A CN103273287 A CN 103273287A CN 2013101915925 A CN2013101915925 A CN 2013101915925A CN 201310191592 A CN201310191592 A CN 201310191592A CN 103273287 A CN103273287 A CN 103273287A
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CN
China
Prior art keywords
production
conducted
strand
heated
rail
Prior art date
Application number
CN2013101915925A
Other languages
Chinese (zh)
Inventor
吉玉
任安超
黄浩
田青
周剑华
王俊
杜娟
费俊杰
张帆
Original Assignee
武汉钢铁(集团)公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 武汉钢铁(集团)公司 filed Critical 武汉钢铁(集团)公司
Priority to CN2013101915925A priority Critical patent/CN103273287A/en
Publication of CN103273287A publication Critical patent/CN103273287A/en

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Abstract

The invention provides a method for producing heavy rails. The method includes the steps that a converter is adopted for smelting, and H is controlled to be less than or equal to 1.2PPm in molten steel; blank casting is conducted, and throwing is conducted with the fixed throwing speed selected in the range from 0.4m-1.1m per minute; casting blank is heated in a heat accumulating type heater; rolling, cooling and other follow-up procedures are conducted normally. The production method not only meets requirements for mechanical properties, but also enables the procedures to be relatively simple, energy consumption is low, production cost of every ton of steel is reduced by at least 2.5%, and namely cost performance is high. In addition, burning loss quantity is not greater than 1.2%, safety requirements of passenger traffic railways are met, and the production method is easy to popularize and implement.

Description

A kind of production method of heavy rail

Technical field

The present invention relates to a kind of production method of rail, belong to a kind of production method of heavy rail particularly.

Background technology

Along with the appearance of problems such as global economy high speed development and climate warming, energy crisis, financial crisis, " energy-saving and emission-reduction, recycling economy and low-carbon economy " become the scientific development theme of advocating in the whole world.For this reason, how to reduce the Heavy-rail Production cost become one of the problem that must consider.

Railway is as the high-tech product that adapts to modern civilization and social progress, be at full speed, heavy, low pollute,, safe and reliable celebrated advanced person's the vehicles, therefore, its employing will reduce the cost of communications and transportation greatly, have the huge social economic benefit.The rail that uses on the railway requires macrostructure not allow white point and shrinkage cavity owing to the consideration from security on the inherent quality, web of the rail center striped and segregation have also been carried out clearly regulation, does not allow the thread defect greater than 0.3mm on surface quality.

According to update search, non-hundred meters common technological process of productions of heavy rail of record are in " development of Wuhan Iron and Steel Plant Rail Production technology " paper that " Wuhan Iron and Steel Plant technology " delivered: converter smelting-continuous casting-roughing-finish rolling-sawing, printing-slow cooling-aligning-saw bore processing-rail-head quenching-inspection-warehouse-in.For satisfying the requirement of modern railways, in hundred meters Heavy-rail Production, carry out the surface quality inspection after all adopting the strand slow cooling at present, reentering heating furnace after qualified heats, and it is heated to about 1300 ℃ from room temperature, after be rolled into hundred meters long heavy rails again.Above production technology is the batch production mode, causes that not only operation is many, and main is production cycle long (having 24 hours slow cooling time at least), the energy resource consumption height, and the unit operation rate is low.

Summary of the invention

The objective of the invention is to overcome the deficiency that prior art exists, provide a kind of not only mechanical property to meet the demands, can also make operation simple relatively, energy consumption is low, the production method of the heavy rail of ton steel production cost reduction at least 2.5%.

Realize the measure of above-mentioned purpose:

A kind of production method of heavy rail the steps include:

1) adopts converter smelting, H≤1.2PPm in the control molten steel;

2) carrying out strand, is to select one as fixedly carrying out throwing in 0.4 ~ 1.1 meter/minute at casting speed;

3) in storage heater strand is heated, control strand charging temperature is being no more than in 150 minutes at 200 ~ 920 ℃, and strand is heated to 1100 ~ 1200 ℃;

4) according to routine be rolled, back operation such as cooling.

The present invention compared with prior art, not only mechanical property meets the demands, and can also make operation simple relatively, energy consumption is low, and ton steel production cost reduces at least 2.5%, i.e. the cost performance height, and the scaling loss amount drops to and is no more than 1.2%, has satisfied the passenger rail safety requirements, is easy to promotion and implementation.

The specific embodiment

Below the present invention is described in detail:

Speed per hour≤350km the Rail for railway of embodiment for producing.

Table 1 is the main production value tabulation of various embodiments of the present invention and Comparative Examples;

Table 2 is the mechanical property of various embodiments of the present invention and Comparative Examples and energy consumption, the tabulation of cost testing result.

A kind of production method of heavy rail the steps include:

1) adopts converter smelting, H≤1.2PPm in the control molten steel;

2) carrying out strand, is to select one as fixedly carrying out throwing in 0.4 ~ 1.1 meter/minute at casting speed;

3) in storage heater strand is heated, control strand charging temperature is being no more than in 150 minutes at 200 ~ 920 ℃, and strand is heated to 1100 ~ 1200 ℃;

4) according to routine be rolled, back operation such as cooling.

Table 1: various embodiments of the present invention and the tabulation of Comparative Examples main technologic parameters

The mechanical property of each embodiment of table 2 and Comparative Examples and energy consumption, the tabulation of cost testing result

As can be seen from Table 2, the heavy rail that the present invention produces not only mechanical property meets the demands, and does not have white point, shrinkage cavity all≤0.5, and energy consumption per ton steel has descended 30 GJ/ hours at least, and ton steel production cost reduces more than 2.5% yuan at least, and the scaling loss amount is up to 1.1%.

Above-described embodiment only exemplifies for the best, and is not to be restriction to embodiments of the present invention.

Claims (1)

1. the production method of a heavy rail the steps include:
1) adopts converter smelting, H≤1.2PPm in the control molten steel;
2) carrying out strand, is to select one as fixedly carrying out throwing in 0.4 ~ 1.1 meter/minute at casting speed;
3) in storage heater strand is heated, control strand charging temperature is being no more than in 150 minutes at 200 ~ 920 ℃, and strand is heated to 1100 ~ 1200 ℃;
4) according to routine be rolled, back operation such as cooling.
CN2013101915925A 2013-05-22 2013-05-22 Method for producing heavy rails CN103273287A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2013101915925A CN103273287A (en) 2013-05-22 2013-05-22 Method for producing heavy rails

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2013101915925A CN103273287A (en) 2013-05-22 2013-05-22 Method for producing heavy rails

Publications (1)

Publication Number Publication Date
CN103273287A true CN103273287A (en) 2013-09-04

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN2013101915925A CN103273287A (en) 2013-05-22 2013-05-22 Method for producing heavy rails

Country Status (1)

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CN (1) CN103273287A (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08291372A (en) * 1995-04-21 1996-11-05 Nippon Steel Corp Drawn parts having profiled cross section and its production
CN1589983A (en) * 2003-08-27 2005-03-09 鞍钢新轧钢股份有限公司 Short flow path manufacturing method of heavy rail
CN1799718A (en) * 2005-01-05 2006-07-12 东北大学 Complete universal finish groove heavy rail rolling method with railhead wheel tread curve shallow slot vertical roller

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08291372A (en) * 1995-04-21 1996-11-05 Nippon Steel Corp Drawn parts having profiled cross section and its production
CN1589983A (en) * 2003-08-27 2005-03-09 鞍钢新轧钢股份有限公司 Short flow path manufacturing method of heavy rail
CN1799718A (en) * 2005-01-05 2006-07-12 东北大学 Complete universal finish groove heavy rail rolling method with railhead wheel tread curve shallow slot vertical roller

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
刘宝升: "国内外重轨生产的发展", 《钢铁》, vol. 17, no. 6, 30 June 1982 (1982-06-30), pages 72 - 77 *
方先周: "武钢高速重轨的工艺特点及装备改造", 《武钢技术》, vol. 48, no. 2, 30 April 2010 (2010-04-30), pages 1 - 6 *

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Application publication date: 20130904