CN108890106A - The method of the mobile Flash Butt Welding of 60kg/m R260 hot rolled rail - Google Patents
The method of the mobile Flash Butt Welding of 60kg/m R260 hot rolled rail Download PDFInfo
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- CN108890106A CN108890106A CN201810834827.0A CN201810834827A CN108890106A CN 108890106 A CN108890106 A CN 108890106A CN 201810834827 A CN201810834827 A CN 201810834827A CN 108890106 A CN108890106 A CN 108890106A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/04—Flash butt welding
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Abstract
The invention discloses a kind of methods of the mobile Flash Butt Welding of 60kg/m R260 hot rolled rail, including glisten, dodge it is flat, accelerate to burn, five stages of upset and pressure maintaining；The total heat input welded in welding process is 3.0~4.8MJ, and the total duration of welding is 110~135s, and the upset amount of welding is 12.4~16.7mm.The present invention passes through total thermal weld stress amount, total weld interval and the upset amount during controlling mobile Flash Butt Welding, and control flash of light, dodge it is flat, accelerate to burn, five stages of upset and pressure maintaining respective thermal weld stress amount and duration, to improve the welding quality of rail；60kg/m R260 hot rolled rail successfully can be subjected to mobile Flash Butt Welding through the invention, the heat affected area overall width of the mobile flash welded tool joint of entire 60kg/m R260 hot rolled rail is controlled within 32mm, and the maximum value of overall width and the difference of minimum value are no more than 8.2mm, the internal flaw of rail joint is few, welding quality stable.
Description
Technical field
The present invention relates to rail welding technique field, especially a kind of mobile Flash Butt Welding of 60kg/m R260 hot rolled rail
Method.
Background technique
WELDING JOINT is made of welding section and the rail base material adjoined, and welding section is divided into weld seam and welding again
Heat affected area (HAZ).According to distance of each point away from weld seam on rail base material, and heat affected area can be roughly divided into three regions：
Coarse grain zone, fine grained region and incomplete annealed zone.Coarse grain zone is also referred to as overheated zone, and the regional temperature is generally at 1200 DEG C or so, tightly
Adjacent incomplete fusion zone.When rail temperature is more than 1100 DEG C, crystal grain can be serious coarse, and the residence time is longer, and heating zone is got over
Width, grain coarsening are also more serious.Widmannstatten structure is readily formed in subsequent cooling procedure.Coarse-grain embrittlement is the spy in this region
Sign, is link most weak in welding point.Fine grained region is phase transformation annealed zone, also known as normalized zone.This regional temperature range
About in Ac3~1000 DEG C, the ferrite and pearlite of fine grained region rail metal is all transformed into austenite, and metal is brilliant after cooling
Grain is uniform and tiny.Incomplete annealed zone is also known as partial phase change area, this regional temperature range is in Ac1~Ac3, this regional characteristics
It is that grain size is different, nonuniform organization.Since welding itself has, heating temperature is high, heating speed is fast, high-temperature residence time
Short, local heating temperature distribution is non-uniform and under field conditions (factors) continuous coo1ing the characteristics of, the joint microstructure just necessarily made, especially
It is that the structural transformation of heat affected area has a rule and feature different from steel rail rolling, and is formed on weld seam periphery there is not similar shape
The tissue (or even forming the adverse tissues such as bainite, martensite) of state, and then its mechanical performance is made to generate biggish difference, hot shadow
Qu Yuekuan is rung, difference is just more obvious.In existing domestic and international rail flash welding standard or technical specification, to rail heat affecting
The width in area has been done clearly stipulate that heat affected area is narrower, more advantageously reduces the probability of adverse tissue appearance, base material and welding section
It is excessive more smooth.
Currently, the mode for being all made of web of the rail clamping both at home and abroad carries out rail clamping and conduction, and use pulsating scintillation welder
Skill welding, the heat affected area overall width of the 60kg/m R260 hot rolled rail connector welded is uneven, often goes out at the connector web of the rail
Existing " bulge " phenomenon, the overall width of heat affected area is excessive, and the width maxima and minima difference of heat affected area is larger, seriously
Influence the mechanical performance of rail.
Summary of the invention
The technical problem to be solved by the present invention is to：There is provided one kind can control effectively to heat affected area width, reduce
The method of the mobile Flash Butt Welding of steel-rail structure internal flaw, the 60kg/m R260 hot rolled rail for improving welding quality.
The method of the mobile Flash Butt Welding of 60kg/m R260 hot rolled rail of the present invention, including glisten, dodge flat, acceleration
It burns, five stages of upset and pressure maintaining；The total heat input welded in welding process is 3.0~4.8MJ, when always continuing of welding
Between be 110~135s, the upset amount of welding is 12.4~16.7mm.
It is further：Dodge the flat stage thermal weld stress amount be 1.8~2.0MJ, rail burn displacement be 0.7~
1.2mm, duration are 19~20s；The thermal weld stress amount of flash stage is 1.0~1.5MJ, and rail burns displacement and is
9.0~11.0mm, duration are 50~60s；The thermal weld stress amount for accelerating to burn the stage is 0.5~0.6MJ, and rail is burnt
Displacement is 13.0~14.0mm, and the duration is 32~34s；The thermal weld stress amount in upset stage is 0.2MJ, and rail is burnt
Displacement is 15.0~16.0mm, and the duration is 2~7s, and electrification upset time is 0.6~1.0s；Packing stage it is lasting when
Between be 12~13s.
It is further：The dwell pressure of packing stage is 28~37t.
The beneficial effects of the invention are as follows：The present invention by total thermal weld stress amount during controlling mobile Flash Butt Welding,
Always weld interval and upset amount, and control flash of light, sudden strain of a muscle are put down, acceleration is burnt, five stage respective sweating heats of upset and pressure maintaining
Input quantity and duration, to improve the welding quality of rail；Through the invention can successfully by 60kg/m R260 hot rolled rail into
The mobile Flash Butt Welding of row controls the heat affected area overall width of the mobile flash welded tool joint of entire 60kg/m R260 hot rolled rail
Within 32mm, and the difference of the maximum value of overall width and minimum value is no more than 8.2mm, and the internal flaw of rail joint is few, welds
Quality is stablized.
Detailed description of the invention
Fig. 1 is the vertical section low power sample after the steel rail weld joint heat treatment of embodiment 1；
Fig. 2 is the vertical section low power sample after the steel rail weld joint heat treatment of embodiment 2；
Fig. 3 is the vertical section low power sample after the steel rail weld joint heat treatment of embodiment 3；
Fig. 4 is the vertical section low power sample after the steel rail weld joint heat treatment of embodiment 4；
Fig. 5 is the vertical section low power sample after the steel rail weld joint heat treatment of embodiment 5；
Fig. 6 is the vertical section low power sample after the steel rail weld joint heat treatment of comparative example 1；
Fig. 7 is the vertical section low power sample after the steel rail weld joint heat treatment of comparative example 2；
Specific embodiment
To facilitate the understanding of the present invention, with reference to the accompanying drawing and the present invention is further detailed in embodiment.
The method of the mobile Flash Butt Welding of 60kg/m R260 hot rolled rail of the present invention, including glisten, dodge flat, acceleration
It burns, five stages of upset and pressure maintaining；The total heat input welded in welding process is 3.0~4.8MJ, when always continuing of welding
Between be 110~135s, the upset amount of welding is 12.4~16.7mm.The present invention passes through total during controlling mobile Flash Butt Welding
Welding machine heat input, total weld interval and upset amount improve the welding quality of 60kg/m R260 hot rolled rail, to reach control
The purpose of connector heat affected area width and joint quality finally improves welding quality to reduce rail joint internal flaw.
The present invention has also carried out further refinement to the technological parameter in each stage and has coordinated, and is mainly reflected in：Dodge flat rank
The thermal weld stress amount of section is 1.8~2.0MJ, and it is 0.7~1.2mm that rail, which burns displacement, and the duration is 19~20s；It dodges
The thermal weld stress amount of photophase be 1.0~1.5MJ, rail burn displacement be 9.0~11.0mm, the duration be 50~
60s；Accelerating the thermal weld stress amount for burning the stage is 0.5~0.6MJ, and it is 13.0~14.0mm that rail, which burns displacement, is continued
Time is 32~34s；The thermal weld stress amount in upset stage is 0.2MJ, and it is 15.0~16.0mm that rail, which burns displacement, is continued
Time is 2~7s, and electrification upset time is 0.6~1.0s；The duration of packing stage is 12~13s.
Dwell pressure is adjusted in packing stage, guarantees that dwell pressure is located in the range of 28~37t, with further
It improves the quality of welding and guarantees the stability of welding.
Embodiment 1
For 60kg/m R260 hot rolled rail when using the welding of mobile steel rail flash welding machine, the first stage dodges flat welding
Heat input is 1.9MJ, and burning displacement is 0.7mm, and the duration is in 19.9s.The thermal weld stress amount of second stage flash of light
For 1.1MJ, displacement is in 10.3mm, duration 52.3s.It is 0.6MJ, position that phase III, which accelerates the thermal weld stress amount burnt,
Shifting amount is 13.4mm, duration 32.9s.The thermal weld stress amount of fourth stage upset be 0.2MJ, displacement 15.6mm,
Electrification upset time is 0.6s, duration 3.7s.The pressure of 5th stage pressure maintaining is in 30.3t, duration 12.9s.
The total heat input of welding process is 3.9MJ, displacement 40.0mm and total welding duration control the method for being 118s, reaches control
The purpose of connector heat affected area width and joint quality.Specific data are listed in Table 1 below.
Table 1
It is as shown in Figure 1 the vertical section low power sample after the steel rail weld joint heat treatment of embodiment 1.Through measuring, using this
The heat affected area overall width of 60kg/m R260 hot rolled rail connector tyre tread of the rail flash welding method welding of patented invention is
28.83mm, the heat affected area overall width at natural axis are 28.08mm, and the vertical disconnected degree in the heat affected area at rail bottom is 25.07mm, heat
The maxima and minima difference of zone of influence overall width is 7.71mm.
Embodiment 2
For 60kg/m R260 hot rolled rail when using the welding of mobile steel rail flash welding machine, the first stage dodges flat welding
Heat input is 1.9MJ, and burning displacement is 0.7mm, and the duration is in 19.8s.The thermal weld stress amount of second stage flash of light
For 1.1MJ, displacement is in 10.4mm, duration 53.6s.It is 0.6MJ, position that phase III, which accelerates the thermal weld stress amount burnt,
Shifting amount is 13.5mm, duration 32.8s.The thermal weld stress amount of fourth stage upset be 0.2MJ, displacement 15.7mm,
Electrification upset time is 0.9s, duration 2.3s.The pressure of 5th stage pressure maintaining is in 30.4t, duration 13.0s.
The method that the total heat input of welding process is 3.8MJ, displacement is 40.6mm and total welding duration control is 119s, reaches control
The purpose of connector heat affected area processed width and joint quality.Specific data are listed in Table 2 below.
Table 2
Vertical section low power sample after being illustrated in figure 2 the steel rail weld joint heat treatment of embodiment 2.Through measuring, using this
The heat affected area overall width of 60kg/m R260 hot rolled rail connector tyre tread of the rail flash welding method welding of patented invention is
29.83mm, the heat affected area overall width at natural axis are 28.93mm, and the vertical disconnected degree in the heat affected area at rail bottom is 28.22mm, heat
The maxima and minima difference of zone of influence overall width is 7.82mm.
Embodiment 3
For 60kg/m R260 hot rolled rail when using the welding of mobile steel rail flash welding machine, the first stage dodges flat welding
Heat input is 1.9MJ, and burning displacement is 0.7mm, and the duration is in 19.9s.The thermal weld stress amount of second stage flash of light
For 1.5MJ, displacement is in 10.0mm, duration 59.6s.It is 0.6MJ, position that phase III, which accelerates the thermal weld stress amount burnt,
Shifting amount is 13.2mm, duration 32.5s.The thermal weld stress amount of fourth stage upset be 0.2MJ, displacement 15.8mm,
Electrification upset time is 1.0s, duration 2.3s.The pressure of 5th stage pressure maintaining is in 29.5t, duration 12.9s.
The method that the total heat input of welding process is 4.2MJ, displacement is 39.7mm and total welding duration control is 124s, reaches control
The purpose of connector heat affected area processed width and joint quality.Specific data are listed in Table 3 below.
Table 3
Vertical section low power sample after being illustrated in figure 3 the steel rail weld joint heat treatment of embodiment 3.Through measuring, using this
The heat affected area overall width of 60kg/m R260 hot rolled rail connector tyre tread of the rail flash welding method welding of patented invention is
29.69mm, the heat affected area overall width at natural axis are 31.09mm, and the vertical disconnected degree in the heat affected area at rail bottom is 27.36mm, heat
The maxima and minima difference of zone of influence overall width is 8.02mm.
Embodiment 4
For 60kg/m R260 hot rolled rail when using the welding of mobile steel rail flash welding machine, the first stage dodges flat welding
Heat input is 1.9MJ, and burning displacement is 0.9mm, and the duration is in 19.8s.The thermal weld stress amount of second stage flash of light
For 1.5MJ, displacement is in 9.9mm, duration 58.6s.It is 0.5MJ, position that phase III, which accelerates the thermal weld stress amount burnt,
Shifting amount is 13.2mm, duration 32.9s.The thermal weld stress amount of fourth stage upset be 0.2MJ, displacement 16.0mm,
Electrification upset time is 0.9s, duration 6.1s.The pressure of 5th stage pressure maintaining is in 28.7t, duration 12.9s.
The method that the total heat input of welding process is 4.1MJ, displacement is 40.0mm and total welding duration control is 124s, reaches control
The purpose of connector heat affected area processed width and joint quality.Specific data are listed in Table 4 below.
Table 4
Vertical section low power sample after being illustrated in figure 4 the steel rail weld joint heat treatment of embodiment 4.Through measuring, using this
The heat affected area overall width of 60kg/m R260 hot rolled rail connector tyre tread of the rail flash welding method welding of patented invention is
31.29mm, the heat affected area overall width at natural axis are 29.82mm, and the vertical disconnected degree in the heat affected area at rail bottom is 27.42mm, heat
The maxima and minima difference of zone of influence overall width is 7.82mm.
Embodiment 5
For 60kg/m R260 hot rolled rail when using the welding of mobile steel rail flash welding machine, the first stage dodges flat welding
Heat input is 1.9MJ, and burning displacement is 1.2mm, and the duration is in 19.9s.The thermal weld stress amount of second stage flash of light
For 1.3MJ, displacement is in 10.6mm, duration 55.9s.It is 0.6MJ, position that phase III, which accelerates the thermal weld stress amount burnt,
Shifting amount is 13.3mm, duration 33.2s.The thermal weld stress amount of fourth stage upset be 0.2MJ, displacement 15.7mm,
Electrification upset time is 1.0s, duration 3.0s.The pressure of 5th stage pressure maintaining is in 29.6t, duration 12.8s.
The method that the total heat input of welding process is 4.0MJ, displacement is 40.8mm and total welding duration control is 121s, reaches control
The purpose of connector heat affected area processed width and joint quality.Specific data are listed in Table 5 below.
Table 5
Vertical section low power sample after being illustrated in figure 5 the steel rail weld joint heat treatment of embodiment 5.Through measuring, using this
The heat affected area overall width of 60kg/m R260 hot rolled rail connector tyre tread of the rail flash welding method welding of patented invention is
28.62mm, the heat affected area overall width at natural axis are 28.60mm, and the vertical disconnected degree in the heat affected area at rail bottom is 24.99mm, heat
The maxima and minima difference of zone of influence overall width is 6.4mm.
Comparative example 1
For 60kg/m R260 hot rolled rail when using the welding of mobile steel rail flash welding machine, the first stage dodges flat welding
Heat input is 1.7MJ, and burning displacement is 0.7mm, and the duration is in 24.0s.The thermal weld stress amount of second stage flash of light
For 6.2MJ, displacement is in 9.9mm, duration 58.5s.It is 0.4MJ, position that phase III, which accelerates the thermal weld stress amount burnt,
Shifting amount is 11.6mm, duration 22.4.The thermal weld stress amount of fourth stage upset is 0.3MJ, displacement 17.4mm, band
Electric upset time is 1.1s, duration 6.7s.The pressure of 5th stage pressure maintaining is in 28.3t, duration 12.0s.Weldering
The method that the total heat input of termination process is 8.5MJ, displacement is 39.6mm and total welding duration control is 117s, reaches control
The purpose of connector heat affected area width and joint quality.Specific data are listed in Table 6 below.
Table 6
Vertical section low power sample after being illustrated in figure 6 the steel rail weld joint heat treatment of comparative example 1.Through measuring, do not use
The heat affected area overall width of the 60kg/m R260 hot rolled rail connector tyre tread of the rail flash welding method welding of invention
For 30.62mm, the heat affected area overall width at natural axis is 41.33mm, and the vertical disconnected degree in the heat affected area at rail bottom is 30.43mm,
The maxima and minima difference of heat affected area overall width is 13.57mm.
Comparative example 2
For 60kg/m R260 hot rolled rail when using the welding of mobile steel rail flash welding machine, the first stage dodges flat welding
Heat input is 1.7MJ, and burning displacement is 1.7mm, and the duration is 23.8.Second stage flash of light thermal weld stress amount be
6.4MJ, displacement is in 12.2mm, duration 61.9s.It is 0.4MJ, displacement that phase III, which accelerates the thermal weld stress amount burnt,
Amount is 11.6mm, duration 22.2.The thermal weld stress amount of fourth stage upset is 0.3MJ, displacement 14.9mm, electrification
Upset time is 1.1s, duration 7.5s.The pressure of 5th stage pressure maintaining is in 27.1t, duration 11.7s.Welding
The method that the total heat input of process is 8.7MJ, displacement is 40.4m and total welding duration control is 119s, reaches control and connects
The purpose of head heat affected area width and joint quality.Specific data are shown in Table 7.
Table 7
Vertical section low power sample after being illustrated in figure 7 the steel rail weld joint heat treatment of comparative example 2.Through measuring, do not use
The heat affected area overall width of the 60kg/m R260 hot rolled rail connector tyre tread of the rail flash welding method welding of invention
For 33.40mm, the heat affected area overall width at natural axis is 41.80mm, and the vertical disconnected degree in the heat affected area at rail bottom is 32.80mm,
The maxima and minima difference of heat affected area overall width is 12.39mm.
It can be seen that from embodiment 1-5 vs comparative examples 1 and comparative example 2, using 60kg/m R260 hot rolling described herein
Heat affected area overall width after steel rail weld joint heat treatment obtained by the method for the mobile Flash Butt Welding of rail all controls
Within 32mm, and the maximum value of overall width and the difference of minimum value are all less than 8.2mm, and do not use pair of herein described method
In ratio 1 and comparative example 2, the heat affected area overall width after steel rail weld joint heat treatment is much higher than 32mm, and overall width is most
The difference of big value and minimum value is both greater than 12mm, far more than the difference for the 8.2mm that the application is controlled.From Fig. 1-5 comparative diagram 6 and figure
7 can be seen that, heat affected area width shown in Fig. 1-5 is much smaller than Fig. 6 and heat affected area shown in Fig. 7, and heat shown in Fig. 1-5
The width up and down of the zone of influence is more average, and there is no the places obviously protruded, it was demonstrated that the magnitude difference of its heat affected area width is not
Greatly, and above and below Fig. 6 and heat affected area shown in Fig. 7 width distribution is uneven, significantly protrudes part as can be seen from Figure, it was demonstrated that
The magnitude difference of its heat affected area width is larger.
Claims (3)
- The method of the mobile Flash Butt Welding of 1.60kg/m R260 hot rolled rail, it is characterised in that：It is burnt including glistening, dodging flat, acceleration Change, five stages of upset and pressure maintaining；The total heat input welded in welding process is 3.0~4.8MJ, the total duration of welding For 110~135s, the upset amount of welding is 12.4~16.7mm.
- 2. the method for the mobile Flash Butt Welding of 60kg/m R260 hot rolled rail as described in claim 1, it is characterised in that：It dodges flat The thermal weld stress amount in stage is 1.8~2.0MJ, and it is 0.7~1.2mm that rail, which burns displacement, and the duration is 19~20s； The thermal weld stress amount of flash stage be 1.0~1.5MJ, rail burn displacement be 9.0~11.0mm, the duration be 50~ 60s；Accelerating the thermal weld stress amount for burning the stage is 0.5~0.6MJ, and it is 13.0~14.0mm that rail, which burns displacement, is continued Time is 32~34s；The thermal weld stress amount in upset stage is 0.2MJ, and it is 15.0~16.0mm that rail, which burns displacement, is continued Time is 2~7s, and electrification upset time is 0.6~1.0s；The duration of packing stage is 12~13s.
- 3. the method for the mobile Flash Butt Welding of 60kg/m R260 hot rolled rail as described in claim 1, it is characterised in that：Pressure maintaining The dwell pressure in stage is 28~37t.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810834827.0A CN108890106B (en) | 2018-07-26 | 2018-07-26 | Moving flash welding method for 60kg/m R260 hot rolled steel rail |
| AU2019208227A AU2019208227B2 (en) | 2018-07-26 | 2019-07-25 | Mobile flash-butt welding method for 60kg/m r260 hot-rolled rail |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810834827.0A CN108890106B (en) | 2018-07-26 | 2018-07-26 | Moving flash welding method for 60kg/m R260 hot rolled steel rail |
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| CN108890106A true CN108890106A (en) | 2018-11-27 |
| CN108890106B CN108890106B (en) | 2020-10-30 |
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| CN110480143A (en) * | 2019-08-26 | 2019-11-22 | 攀钢集团攀枝花钢铁研究院有限公司 | The technique of control electrode lower limit Mn content R350HT rail flash welding joint microstructure |
| CN110480144A (en) * | 2019-08-26 | 2019-11-22 | 攀钢集团攀枝花钢铁研究院有限公司 | The technique of Mn content R350HT rail flash welding joint microstructure is limited in control |
| CN110480140A (en) * | 2019-08-26 | 2019-11-22 | 攀钢集团攀枝花钢铁研究院有限公司 | The technique of upper control limit Mn content R350HT rail flash welding joint microstructure |
| CN110480142A (en) * | 2019-08-26 | 2019-11-22 | 攀钢集团攀枝花钢铁研究院有限公司 | The technique of upper limit Mn content R350HT rail flash welding joint microstructure in control |
| CN110512139A (en) * | 2019-07-31 | 2019-11-29 | 攀钢集团攀枝花钢铁研究院有限公司 | A method of control R260 WELDING JOINT martensitic structure |
| CN110512148A (en) * | 2019-07-31 | 2019-11-29 | 攀钢集团攀枝花钢铁研究院有限公司 | A method of control R260 WELDING JOINT martensitic structure |
| CN110512149A (en) * | 2019-07-31 | 2019-11-29 | 攀钢集团攀枝花钢铁研究院有限公司 | A method of control R260 WELDING JOINT martensitic structure |
| CN110760761A (en) * | 2019-07-31 | 2020-02-07 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for controlling R260 steel rail flash welding joint martensite structure |
| CN113305407A (en) * | 2021-06-15 | 2021-08-27 | 中国铁道科学研究院集团有限公司金属及化学研究所 | Flash welding process of 75kg/m 1380MPa bainite steel rail |
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| CN110480139B (en) * | 2019-08-26 | 2022-08-05 | 攀钢集团攀枝花钢铁研究院有限公司 | Process for controlling flash welding joint structure of steel rail with lower limit Mn content R350HT |
| CN110480138B (en) * | 2019-08-26 | 2022-08-09 | 攀钢集团攀枝花钢铁研究院有限公司 | Process for controlling upper limit Mn content R350HT steel rail flash welding joint structure |
| CN115488483A (en) * | 2022-11-03 | 2022-12-20 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for improving bonding strength of steel rail flash butt joint |
| CN115488482A (en) * | 2022-11-03 | 2022-12-20 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for reducing width of heat affected zone of high-strength pearlite steel rail flash welding head |
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- 2018-07-26 CN CN201810834827.0A patent/CN108890106B/en active Active
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| CN110760761A (en) * | 2019-07-31 | 2020-02-07 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for controlling R260 steel rail flash welding joint martensite structure |
| CN110512149A (en) * | 2019-07-31 | 2019-11-29 | 攀钢集团攀枝花钢铁研究院有限公司 | A method of control R260 WELDING JOINT martensitic structure |
| CN110512148A (en) * | 2019-07-31 | 2019-11-29 | 攀钢集团攀枝花钢铁研究院有限公司 | A method of control R260 WELDING JOINT martensitic structure |
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| CN110480142B (en) * | 2019-08-26 | 2021-07-13 | 攀钢集团攀枝花钢铁研究院有限公司 | Process for controlling flash welding joint structure of steel rail with middle and upper limit Mn content R350HT |
| CN110480143A (en) * | 2019-08-26 | 2019-11-22 | 攀钢集团攀枝花钢铁研究院有限公司 | The technique of control electrode lower limit Mn content R350HT rail flash welding joint microstructure |
| CN110480142A (en) * | 2019-08-26 | 2019-11-22 | 攀钢集团攀枝花钢铁研究院有限公司 | The technique of upper limit Mn content R350HT rail flash welding joint microstructure in control |
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| CN110480139B (en) * | 2019-08-26 | 2022-08-05 | 攀钢集团攀枝花钢铁研究院有限公司 | Process for controlling flash welding joint structure of steel rail with lower limit Mn content R350HT |
| CN113305407A (en) * | 2021-06-15 | 2021-08-27 | 中国铁道科学研究院集团有限公司金属及化学研究所 | Flash welding process of 75kg/m 1380MPa bainite steel rail |
| CN113427109A (en) * | 2021-08-09 | 2021-09-24 | 攀钢集团攀枝花钢铁研究院有限公司 | Welding method of copper-containing corrosion-resistant steel rail |
| CN115488483A (en) * | 2022-11-03 | 2022-12-20 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for improving bonding strength of steel rail flash butt joint |
| CN115488482A (en) * | 2022-11-03 | 2022-12-20 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for reducing width of heat affected zone of high-strength pearlite steel rail flash welding head |
| CN115488482B (en) * | 2022-11-03 | 2023-12-22 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for reducing width of heat affected zone of high-strength pearlitic steel rail flash welding head |
| CN115488483B (en) * | 2022-11-03 | 2024-04-09 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for improving bonding strength of steel rail flash butt welding joint |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108890106B (en) | 2020-10-30 |
| AU2019208227B2 (en) | 2021-02-11 |
| AU2019208227A1 (en) | 2020-02-13 |
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