CN102643971A - Online thermal treatment device for heavy rail - Google Patents
Online thermal treatment device for heavy rail Download PDFInfo
- Publication number
- CN102643971A CN102643971A CN2012101066187A CN201210106618A CN102643971A CN 102643971 A CN102643971 A CN 102643971A CN 2012101066187 A CN2012101066187 A CN 2012101066187A CN 201210106618 A CN201210106618 A CN 201210106618A CN 102643971 A CN102643971 A CN 102643971A
- Authority
- CN
- China
- Prior art keywords
- heavy rail
- thermal treatment
- rail
- bellows
- crosswind
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
Images
Abstract
The invention discloses an online thermal treatment device for a heavy rail. The online thermal treatment device for the heavy rail consists of a wind path system and a gas injection device, wherein the wind path system comprises an air cooler; the cooler is mutually connected with a gas distribution cylinder provided with a plurality of gas feed pipes through a gas conveying pipe and a control valve; the pressure of gas is controlled by each gas feed pipe through independently arranged pressure regulating valves; the gas injection device consists of an air bellow and two side air bellows arranged on a support; the upper air bellow and the side air bellows are respectively and mutually connected with the gas feed pipes of the gas distribution cylinder of the wind path system through an admission pipe; and the bottom face of the upper air bellow and the inner side faces of the side air bellows are respectively provided with a plurality of nozzles which are mutually vertical to the top faces and the side face of the railhead of the heavy rail. The online thermal treatment device for the heavy rail is simple in structure, low in manufacturing cost, simple and convenient in operation and use, high in thermal treatment efficiency and low in energy consumption. The heavy rail thermal treatment cooling speed is high; cooling is even; the hardened layer of the heavy rail after being thermally treated is deep; the tissue and the hardness of the railhead evenly transit; hardness fall or softened strips cannot be generated; the flatness of the heavy rail is high; and the inherent quality of a heavy rail product is obviously increased.
Description
Technical field
The present invention relates to railway heavy rail heat treatment technics, the online thermal treatment unit of particularly a kind of heavy rail.
Background technology
Heavy rail is 880～920 ℃ in the temperature out of universal rolling final pass; Be austenitic state; It is directly sent in the thermal treatment unit that is provided with refrigerating unit; The rail head tread is quickened cooling uniformly, make in the from outward appearance to inner essence dark scope of heavy rail head and obtain the fine pearlite tissue that even hardness reduces, thisly on steel rolling production-line, utilize rolling waste heat that the heavy rail heat-treating process is called " online thermal treatment process ".
The milling train with international most advanced level has all been equipped by railway Heavy-rail Production factory of the existing a few family of China; The dimensional precision of heavy rail satisfies request for utilization basically; But high speed and heavy loading along with China railways; Wear resisting property to the rail head tread proposes higher requirement, and thermal treatment is to improve one of effective ways of rail head tread wear resisting property.At present, the thermal treatment of heavy rail is main with off-line thermal treatment mainly, exists the energy consumption height, efficient is low, and problem such as the transition of rail head hardened layer is inhomogeneous.To the exploitation of these problems a kind ofly can mate fully with rolling rhythm, obtained performance satisfies " heat-treated rail technical qualification " online thermal treatment unit of heavy rail (TB/T2635-2004) and is very important when effectively cutting down the consumption of energy and raising the efficiency.
Summary of the invention
To above-mentioned needs, task of the present invention provide a kind of simple in structure, cheap, easy for operation, to improving the Heavy-rail Production quality the online thermal treatment unit of heavy rail of positive effect is arranged.
For realizing above-mentioned task, the online thermal treatment unit of heavy rail provided by the invention comprises air path system and air jet system; It is characterized in that: said air path system comprises air-cooler, and this air-cooler joins through pneumatic tube and valve and sub-cylinder, and sub-cylinder is provided with a plurality of induction pipes, and each induction pipe is controlled gaseous tension through the relief valve of independent setting; Said air jet system is made up of support, rack-mount last bellows and two crosswind casees; The bottom surface of last bellows has and the vertical nozzle down of heavy rail rail head end face; The medial surface of two crosswind casees has the side nozzle with heavy rail rail head lateral vertical respectively, and last bellows and crosswind case join through the induction pipe of last bellows inlet pipe and crosswind case inlet pipe and said air path system sub-cylinder respectively.
Said bellows and two long 500mm of crosswind case, the wide 80mm of going up; Being two group of three rows of mutually staggered in the following nozzle plane of last bellows bottom surface distributes; Being two groups of two rows of mutually staggered in the side nozzle plane of crosswind case medial surface distributes.
Said upward bellows inlet pipe is located at the side of bellows; Crosswind case inlet pipe is located at the end face of crosswind case.
When thermal treatment unit of the present invention uses, pending heavy rail is delivered between the following nozzle and side nozzle of thermal treatment unit, leaned on the cooling gas of nozzle ejection that heavy rail is carried out online thermal treatment through rollgang.
The advantage of heavy rail thermal treatment unit of the present invention is:
1, simple in structure, low cost of manufacture;
2, manipulate easyly, production efficiency is high, and energy consumption is low;
3, the heavy rail rail head is heat-treated by the cooling gas of air nozzle ejection, and speed of cooling is fast, and cooling evenly; Heavy rail hardened-depth after the thermal treatment, heavy rail head tissue and even hardness transition, no hardness slump and zone of transformation; Planeness is high, and heavy rail product inner quality obviously improves.
Description of drawings
Fig. 1 is the air path system structure iron of thermal treatment unit of the present invention;
Fig. 2 is the front view of the air jet system of thermal treatment unit of the present invention;
Fig. 3 is Fig. 2 vertical view;
Fig. 4 goes up bellows bottom upward view among Fig. 2;
Fig. 5 is Fig. 4 vertical view;
Fig. 6 is the right view of left part crosswind case among Fig. 2;
Fig. 7 is Fig. 6 vertical view;
Fig. 8 is the front view of Fig. 2 medium-height trestle;
Fig. 9 is Fig. 8 vertical view;
Figure 10 is U75V60kg/m heavy rail hardened layer hardness (HRC) distribution plan after heat treatment.
Among the figure: 1-air-cooler, 2-cooling water inlet, 3-water cooler inlet pipe, 4-cooling water outlet, 5-pneumatic tube; The 6-valve, 7-sub-cylinder, 8-relief valve, 9-induction pipe, 10-support; 11-crosswind case, the last bellows inlet pipe of 12-, 13-crosswind case inlet pipe, the last bellows of 14-, nozzle under the 15-; The 16-side nozzle, 17-heavy rail, 18-heavy rail rollgang, 19-long strip shape open hole.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is further described.
As shown in Figure 1; The air path system of the online thermal treatment unit of heavy rail of the present invention, the pressurized air (temperature is higher than 100 ℃) by air compressor machine produces gets into air-cooler 1 through water cooler inlet pipe 3; Via flow into from cooling water inlet 2, gas temperature is reduced to 28 ℃ after the cooling water outlet 4 effusive water quench; Deliver to sub-cylinder 7 through pneumatic tube 5 and valve 6, sub-cylinder has seven outlets, and each outlet all is connected to an induction pipe 9 through a relief valve 8; The gaseous tension that each induction pipe provides can be regulated separately, and cooling gas is delivered to the last bellows and the crosswind case of following air jet system by induction pipe after through the relief valve pressure regulation.
With reference to Fig. 2 to Fig. 8, the air jet system of thermal treatment unit is made up of with last bellows 14 and two crosswind casees 11 of being fixedly mounted on this support on left and right two groups (four)
the shape supports 10 that are installed on the heavy rail rollgang 18 totally.The length of last bellows and crosswind case is 500mm, and width is 80mm, and the width of support is 50mm.Last bellows 14 are installed on the top end rail of two pack supports through screw retention; The end face of heavy rail 18 rail heads is aimed in the bottom surface of last bellows; Like Fig. 4 and shown in Figure 5; The internal thread hole that distributes through two group of three rows of mutually staggered that is provided with on the bottom surface of case of being in the wind is installed a plurality of and the perpendicular following nozzle 15 of heavy rail 17 rail head end faces; These are interlaced distribution in nozzle plane down, and are even to the jet cooling of rail head end face to guarantee; Last bellows have three to go up bellows inlet pipe 12; Each inlet pipe is joined with an induction pipe of said air path system sub-cylinder respectively; Three inlet pipe are installed in the side of bellows; Make inlet pipe and following nozzle not on same direction, so that even from the gas distribution of each following nozzle ejection of last bellows.Two crosswind casees 11 fixedly mount respectively through screw on the middle beam of one group of
shape support on the left and the right, and the medial surface of both sides bellows is aimed at the side of heavy rail 17 rail heads respectively; For ease of adjusting two crosswind casees, on this crossbeam, offer the long strip shape open hole 19 that matches with screw from the lateral distance of heavy rail rail head; Like Fig. 6 and shown in Figure 7; The internal thread hole that on the medial surface of both sides bellows, distributes through two groups of two rows of mutually staggered that are provided with is respectively installed a plurality of and perpendicular side nozzle 16 in heavy rail 17 rail head sides; Also be interlaced distribution in these side nozzle planes; Purpose guarantees even to the jet cooling in rail head side with last identical; The crosswind case has two crosswind case inlet pipe 13; Each inlet pipe is joined with an induction pipe of said air path system sub-cylinder respectively; Two inlet pipe are installed in the end face of crosswind case; Make inlet pipe and side nozzle not on same direction, so that even from the gas distribution of each side nozzle ejection of crosswind case.
During use, utilize the upper-lower position of the standing bolt adjustment support of support bottom and heavy rail rollgang 18, thereby the upper-lower position of bellows is gone up in adjustment; Utilize the position, the left and right sides of the long strip shape open hole adjustment crosswind case on the mid-stent crossbeam, make heavy rail rail head end face and following nozzle distance and rail head side and side nozzle apart from according with process requirements, will go up bellows and crosswind case and support with bolt then and fix.Gas by nozzle ejection under the last bellows cools off heavy rail rail head end face; Gas by the ejection of crosswind case side nozzle cools off heavy rail rail head side.
For improving the online heat treatment efficiency of heavy rail, situ production can adopt many above-mentioned thermal treatment units to be arranged side by side, with lengthening thermal treatment length.
With the sample is that U75V 60kg/m heavy rail is an example, utilize apparatus of the present invention it is carried out online heat treated concrete technological operation and thermal effectiveness following.
Sample is that the composition of U75V 60kg/m heavy rail is as shown in table 1.
Table 1 experiment is with U75V 60kg/m heavy rail Chemical Composition (%)
| C | Si | Mn | P | S | V | Fe |
| 0.75 | 0.60 | 0.85 | 0.019 | 0.010 | 0.074 | Surplus |
At first, be that the sample of 250mm is put into the roller bottom type resistance furnace and heated with length, heat-up time, 50min made the whole austenitizings of heavy rail, simulation heavy rail universal rolling final pass temperature out.Then with its hauling-out; Air cooling 25s; The simulation heavy rail, waits rail head surface maximum temperature (rail head lower edge) to pull it into thermal treatment unit when reducing to 865 ℃ and carries out jet pressure cooling with FLIR Systems thermal imaging system Real Time Observation heavy rail head surface variation of temperature at the temperature drop of cold bed section roller-way; In this process, drag sample (guaranteeing that sample does not go out the thermal treatment air jet system) slowly back and forth, to guarantee that surface cool is even.In the thermal treatment air jet system cooling 80s after, on rail head center, the rail head under fillet and the rail head radiused surface temperature reduce to 428 ℃, 409 ℃, 436 ℃ respectively, according to the CCT curve of U75V Properties of Heavy Rail Steel By, pearlitic transformation is accomplished in the case.At last, sample is hauled out the thermal treatment air jet system rapidly, carry out air cooling, 26 ℃ of envrionment temperatures then on the top of the shelf.Through experiment repeatedly, U75V 60kg/m heavy rail thermal treatment optimal processing parameter is as shown in table 2.
Table 2 experimental technique
| The heavy rail temperature | Spray wind distance | The spray wind pressure | The spray wind time | Wind-warm syndrome | Envrionment temperature |
| 900℃ | 15mm | 0.26Mpa | 80s | 28℃ | 26℃ |
In the sampling of sample middle part, sampling thickness 20mm, grinding and polishing; And with the corrosion of 4% nital; Observe hardened layer macrostructure,, increase than thin hardened layer with the off-line heat treatment phase that only carries out the rail head heating though the heavy rail head after the visible thermal treatment can be seen hardened layer; And even transition, thereby effectively avoided the generation of hardness slump and zone of transformation.Stipulate (TB/T2635-2004) that according to " heat-treated rail technical qualification " Rockwell hardness (HRC) of the sample rail head middle part section after his-and-hers watches 2 process heats are handled is measured, TP is 3mm at interval, and measuring result is shown in figure 10.Greater than 24mm, the fillet thin hardened layer is greater than 15mm under rail head in rail head center and last fillet thin hardened layer.Much larger than " heat-treated rail technical qualification " (TB/T2635-2004) stipulate " thin hardened layer at the rail head center greater than 15mm and under rail head fillet greater than 10mm " standard.
Sample rail head surface after handling according to his-and-hers watches 2 process heats grinds off behind the Decarburized layer of 0.5mm to its centre of surface vertical Bu Shi measurements and measures, interval 20mm, and measuring result is as shown in table 3.Can be known that by table 3 rail head surface is after grinding off the 0.5mm Decarburized layer, vertically hardness fluctuations is no more than 10HBW on the sample of 250mm, the standard of " vertical hardness is no more than 30HBW " of (TB/T2635-2004) stipulate far below " heat-treated rail technical qualification ",
The vertical Hardness Distribution of rail head surface after table 3 thermal treatment
Above test result shows that heavy rail thermal treatment unit of the present invention is reasonable in design, and the U75V 60kg/m heavy rail performance after the thermal treatment is higher than " heat-treated rail technical qualification " requirement (TB/T2635-2004).
Claims (3)
1. the online thermal treatment unit of heavy rail comprises air path system and air jet system; It is characterized in that: said air path system comprises air-cooler (1); This air-cooler joins with sub-cylinder (7) through pneumatic tube (5) and valve (6); Sub-cylinder is provided with a plurality of induction pipes (9), and each induction pipe is controlled gaseous tension through the relief valve (8) that is provided with separately; Said air jet system is made up of support (10), rack-mount last bellows (14) and two crosswind casees (11); The bottom surface of last bellows (14) has and the vertical nozzle (15) down of heavy rail (17) rail head end face; The medial surface of two crosswind casees (11) has the side nozzle (16) with heavy rail (17) rail head lateral vertical respectively, and last bellows (14) and crosswind case (11) join through the induction pipe (9) of last bellows inlet pipe (12) and crosswind case inlet pipe (13) and said air path system sub-cylinder respectively.
2. the online thermal treatment unit of heavy rail according to claim 1 is characterized in that: said bellows (14) and the long 500mm of two crosswind casees (11), the wide 80mm of going up; Being two group of three rows of mutually staggered in following nozzle (15) plane of last bellows (14) bottom surface distributes; Being two groups of two rows of mutually staggered in side nozzle (16) plane of crosswind case (11) medial surface distributes.
3. the online thermal treatment unit of heavy rail according to claim 1 and 2 is characterized in that: said upward bellows inlet pipe (12) is located at the side of bellows (14); Crosswind case inlet pipe (13) is located at the end face of crosswind case (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101066187A CN102643971A (en) | 2012-04-12 | 2012-04-12 | Online thermal treatment device for heavy rail |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101066187A CN102643971A (en) | 2012-04-12 | 2012-04-12 | Online thermal treatment device for heavy rail |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102643971A true CN102643971A (en) | 2012-08-22 |
Family
ID=46657046
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012101066187A Pending CN102643971A (en) | 2012-04-12 | 2012-04-12 | Online thermal treatment device for heavy rail |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102643971A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103498027A (en) * | 2013-05-08 | 2014-01-08 | 内蒙古科技大学 | Experimental apparatus for forced air cooling quenching |
| CN106498143A (en) * | 2016-10-20 | 2017-03-15 | 武汉钢铁股份有限公司 | A kind of burning optimization on line method and burning optimization on line system for rail |
| CN107130098A (en) * | 2017-06-14 | 2017-09-05 | 武汉钢铁有限公司 | Heat-treatment of rail device and heat treatment method |
| CN107541596A (en) * | 2017-08-28 | 2018-01-05 | 芜湖中铁科吉富轨道有限公司 | A kind of burning optimization on line technique of U75V rail |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6487720A (en) * | 1987-09-30 | 1989-03-31 | Nippon Steel Corp | Heat treatment for rail |
| US4913747A (en) * | 1984-12-24 | 1990-04-03 | Nippon Steel Corporation | Method of and apparatus for heat-treating rails |
| US4953832A (en) * | 1988-03-24 | 1990-09-04 | Bethlehem Steel Corporation | Apparatus for the controlled cooling of hot rolled steel samples |
| CN2111292U (en) * | 1991-12-26 | 1992-07-29 | 冶金工业部攀枝花钢铁公司 | Cooling device for steel rail heat treating |
| JPH07216455A (en) * | 1994-01-31 | 1995-08-15 | Nippon Steel Corp | Heat treatment of rail |
| JPH1087720A (en) * | 1996-07-26 | 1998-04-07 | Mitsui Petrochem Ind Ltd | Catalyst for polymerizing alpha-olefin |
| CN2440150Y (en) * | 2000-09-07 | 2001-07-25 | 攀枝花新钢钒股份有限公司氧气厂 | Oxygen-supplying device capable of realizing multi-stage differentical pressure operation |
| CN1920062A (en) * | 2006-09-12 | 2007-02-28 | 攀枝花钢铁(集团)公司 | Rail heat processing method and rail heat processing unit |
| CN101148736A (en) * | 2007-11-14 | 2008-03-26 | 攀枝花钢铁(集团)公司 | Steel rail and producing method thereof |
| CN101811115A (en) * | 2010-02-26 | 2010-08-25 | 深圳市浩能科技有限公司 | Baking oven device of matrix (copper foil or aluminum foil) suspension type coating machine |
-
2012
- 2012-04-12 CN CN2012101066187A patent/CN102643971A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4913747A (en) * | 1984-12-24 | 1990-04-03 | Nippon Steel Corporation | Method of and apparatus for heat-treating rails |
| JPS6487720A (en) * | 1987-09-30 | 1989-03-31 | Nippon Steel Corp | Heat treatment for rail |
| US4953832A (en) * | 1988-03-24 | 1990-09-04 | Bethlehem Steel Corporation | Apparatus for the controlled cooling of hot rolled steel samples |
| CN2111292U (en) * | 1991-12-26 | 1992-07-29 | 冶金工业部攀枝花钢铁公司 | Cooling device for steel rail heat treating |
| JPH07216455A (en) * | 1994-01-31 | 1995-08-15 | Nippon Steel Corp | Heat treatment of rail |
| JPH1087720A (en) * | 1996-07-26 | 1998-04-07 | Mitsui Petrochem Ind Ltd | Catalyst for polymerizing alpha-olefin |
| CN2440150Y (en) * | 2000-09-07 | 2001-07-25 | 攀枝花新钢钒股份有限公司氧气厂 | Oxygen-supplying device capable of realizing multi-stage differentical pressure operation |
| CN1920062A (en) * | 2006-09-12 | 2007-02-28 | 攀枝花钢铁(集团)公司 | Rail heat processing method and rail heat processing unit |
| CN101148736A (en) * | 2007-11-14 | 2008-03-26 | 攀枝花钢铁(集团)公司 | Steel rail and producing method thereof |
| CN101811115A (en) * | 2010-02-26 | 2010-08-25 | 深圳市浩能科技有限公司 | Baking oven device of matrix (copper foil or aluminum foil) suspension type coating machine |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103498027A (en) * | 2013-05-08 | 2014-01-08 | 内蒙古科技大学 | Experimental apparatus for forced air cooling quenching |
| CN106498143A (en) * | 2016-10-20 | 2017-03-15 | 武汉钢铁股份有限公司 | A kind of burning optimization on line method and burning optimization on line system for rail |
| CN107130098A (en) * | 2017-06-14 | 2017-09-05 | 武汉钢铁有限公司 | Heat-treatment of rail device and heat treatment method |
| CN107130098B (en) * | 2017-06-14 | 2019-07-12 | 武汉钢铁有限公司 | Heat-treatment of rail device and heat treatment method |
| CN107541596A (en) * | 2017-08-28 | 2018-01-05 | 芜湖中铁科吉富轨道有限公司 | A kind of burning optimization on line technique of U75V rail |
| CN107541596B (en) * | 2017-08-28 | 2018-12-25 | 芜湖中铁科吉富轨道有限公司 | A kind of burning optimization on line technique of U75V rail |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2715320C (en) | Cooling system and cooling method of rolling steel | |
| ES2951582T3 (en) | Method for thermal treatment of rails | |
| CN100580102C (en) | Process for producing high strength hardened and tempered steel by steekle mill on-line quenching | |
| CN101879531A (en) | Hot rolled strip laminar cooling device capable of controlling cooled strip shape | |
| KR101376565B1 (en) | Method and apparatus for controlling the temperature of strip in the rapid cooling section of continuous annealing line | |
| RU2456352C1 (en) | Procedure and device for thermal treatment of rails | |
| CN107922988B (en) | Method for non-contact cooling of steel sheet and apparatus therefor | |
| CN202185466U (en) | Ultra-fast cooling device after rolling based on ultra-fast cooling technology | |
| CN102643971A (en) | Online thermal treatment device for heavy rail | |
| CN101890437A (en) | After-rolling cooling system for hot rolled steel strip production line | |
| CN104513885A (en) | Continuous quenched-tempered heat treatment production line equipment for hardened and tempered steel medium-small bars or tubular stocks | |
| CN102421544A (en) | Cooling method and cooling device for hot-rolled steel sheets | |
| CN100376695C (en) | Method for making quench hardening layer of cold roll barrel | |
| CN101829688A (en) | Cooling method of heavy and medium plate controlled rolling intermediate blank | |
| CN104017975B (en) | A kind of injected cool radiator cooler of long steel rail press quenching unit | |
| CN102061363A (en) | Direct quenching device for medium plate and quenching process thereof | |
| CN101792847A (en) | Direct thermal treatment process technology after rolling steel plate | |
| CN217377969U (en) | Device for flexibly cooling tempered steel plate | |
| CN114592112B (en) | Flexible cooling device for tempered steel plate | |
| JP4066387B1 (en) | Steel bar controlled cooling system | |
| JP2015066554A (en) | Manufacturing apparatus of rail | |
| CN202380050U (en) | Steel belt bainite-martensite complex phase quenching system | |
| CN102492825B (en) | Steel band bainite and martensite multiphase quenching system | |
| CN106011397B (en) | 42CrMo bars control water quenching heat-treatment technology method | |
| CN104017956A (en) | Spraying and air cooling dual-purpose quenching device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20120822 |