CN106065427A - A kind of hardening and tempering process of railway locomotive derailing support shaft - Google Patents
A kind of hardening and tempering process of railway locomotive derailing support shaft Download PDFInfo
- Publication number
- CN106065427A CN106065427A CN201610621973.6A CN201610621973A CN106065427A CN 106065427 A CN106065427 A CN 106065427A CN 201610621973 A CN201610621973 A CN 201610621973A CN 106065427 A CN106065427 A CN 106065427A
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- Prior art keywords
- support shaft
- tempering process
- railway locomotive
- hardening
- carries out
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/28—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for plain shafts
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The present invention provides the hardening and tempering process of a kind of railway locomotive derailing support shaft, comprises the steps: the 1st step, support shaft is heated to more than 880 DEG C；2nd step, carries out isothermal holding to support shaft；3rd step, carries out 2 coolings and processes support shaft, first uses the cooling of NaCl saline solution, then goes out to be water-cooled to natural temperature, and the hardness requirement of the support shaft after quenched process is HRC56 60；4th step, carries out high tempering process to support shaft, and heating-up temperature is more than 560 DEG C, and the hardness requirement of the support shaft after modifier treatment is HBW252 302.Use the present invention so that the mechanical strength of support shaft in railway locomotive derailing device significantly improves, thus it is effectively improved the bend resistance of support shaft, impact strength, therefore, during the automatic rerail of rolling stock adjusts, it is ensured that the functional reliability that railway locomotive derailing device is overall.
Description
Technical field
The present invention relates to railway locomotive derailing technical field, especially relate to a kind of railway locomotive derailing support shaft
Hardening and tempering process.
Background technology
When railroad locomotive running is on rail, when especially rolling stock runs on overhead railway line, in order to anti-
The only generation of vehicle derailing, needs rolling stock to install anti-derail unit to ensure the automatic rerail of rolling stock and can just maintain additional
Often run.Existing railway locomotive derailing device as shown in Figure 1 and Figure 2, mainly includes derailing wheel 2, support shaft 3, installing rack
5 and bearing 8, wherein, between described installing rack 5 and axletree 6, form relatively turnable flexible connection, described support shaft 3 is led to
Cross connecting bolt and be fixedly connected on bottom installing rack 5, can be relative by bearing 8 composition between described derailing wheel 2 and support shaft 3
The flexible connection rotated.
As it is shown in figure 1, rail vehicles wheel 7 along rail 4 properly functioning time, its both sides derailing wheel 2
Be respectively positioned on below sleeper beam 1 and and sleeper beam 1 between keep suitable distance.But, if rail vehicles is relative to sleeper beam 1
During the deflection of raw certain angle, the derailing of rail vehicles yawing moment offside take turns 2 will and sleeper beam 1 between close contact
And rotate relative to sleeper beam 1, to ensure the automatic rerail of rolling stock and can maintain properly functioning.Adjust at the automatic rerail of rolling stock
During whole, between derailing wheel 2 and support shaft 3, produce strong percussion, therefore, the mechanical strength of support shaft 3 itself
Derailing effect for rolling stock is most important.If support shaft 3 bends because mechanical strength is not enough or fractures,
The derailing performance reliability of rolling stock anti-derail unit entirety will be greatly affected and even completely lose.
Summary of the invention
The technical problem to be solved in the present invention is: the problem existed for prior art, it is provided that a kind of railway locomotive anticreep
The hardening and tempering process of rail support shaft, improves the mechanical strength of support shaft itself, to ensure overall the preventing of railway locomotive derailing device
Derailing reliability.
The technical problem to be solved in the present invention realizes by the following technical solutions: a kind of railway locomotive derailing support shaft
Hardening and tempering process, comprise the steps:
1st step, is heated to more than 880 DEG C by support shaft；
2nd step, carries out isothermal holding to support shaft；
3rd step, carries out 2 coolings and processes support shaft, first uses the cooling of NaCl saline solution, then goes out to be water-cooled to nature
Temperature, the hardness requirement of the support shaft after quenched process is HRC56-60；
4th step, carries out high tempering process to support shaft, and heating-up temperature is more than 560 DEG C, the support shaft after modifier treatment
Hardness requirement be HBW252-302.
Preferably, in described 1st step, support shaft is heated to 880 DEG C-900 DEG C.
Preferably, in described 2nd step, the temperature retention time of support shaft is 20min-25min.
Preferably, in described 3rd step, the NaCl saline solution concentration used is 8%-12%.
Preferably, in described 3rd step, use NaCl saline solution that support shaft is cooled to 180-190 DEG C.
Preferably, in described 3rd step, support shaft is first after NaCl saline solution cools down, then goes out water-air cooling or oil is cooled to
Natural temperature.
Preferably, in described 3rd step, when using NaCl saline solution that support shaft carries out cooling process, when NaCl saline
After shake in solution stops, going out water-air cooling or oil is cooled to natural temperature.
Preferably, in described 4th step, the heating-up temperature that support shaft carries out high tempering process is 560-600 DEG C.
Compared with prior art, the invention has the beneficial effects as follows: use the hardening and tempering process of the present invention so that railway machine
The mechanical strength of the support shaft in car anti-derail unit significantly improves, thus be effectively improved support shaft bend resistance,
Impact strength, during the automatic rerail of rolling stock adjusts, it is ensured that the work of railway locomotive derailing device entirety can
By property.
Accompanying drawing explanation
Fig. 1 is the structure principle chart of existing railway locomotive derailing device.
Fig. 2 is the partial enlarged drawing in Fig. 1 at A.
Fig. 3 is the process chart of the hardening and tempering process of the present invention a kind of railway locomotive derailing support shaft.
Labelling in figure: 1-sleeper beam, 2-derailing wheel, 3-support shaft, 4-rail, 5-installing rack, 6-axletree, 7-wheel, 8-
Bearing, 9-axial compression lid, 10-joint gland, 11-connecting bolt, 12-exterior seal ring, 13-inner seal ring, the 31-shaft shoulder.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with the accompanying drawings and be embodied as
The present invention is described in detail for example.Should be appreciated that specific embodiment described herein only in order to explain the present invention, not
For limiting the present invention.
Railway locomotive derailing device as shown in Figure 1 and Figure 2, including derailing wheel 2, support shaft 3, bearing 8 and joint
Gland 10 and exterior seal ring 12, described derailing wheel 2 is sleeved on the periphery of bearing 8, and described joint gland 10 passes through
Connecting bolt 11 is fixedly connected on outside derailing wheel 2 and covers outside bearing 8；Described exterior seal ring 12 passes through connecting bolt
11 are fixedly connected on inside derailing wheel 2 and cover inside bearing 8, so that passing through bearing between derailing wheel 2 and support shaft 3
8 constitute relatively turnable flexible connection.The shaft shoulder 31 is set in described support shaft 3, and, one end of described support shaft 3
Being connected so that interference fit is fixing with between bearing 8 endoporus, the other end is bolted to connection with installing rack 5；Supporting
The axial compression lid 9 of T-shaped hierarchic structure is set outside axle 3, is connected by connecting bolt 11 solid between described axial compression lid 9 and support shaft 3
Fixed；Between the shaft shoulder 31 and bearing 8, be installed with inner seal ring 13, by the shaft shoulder 31 can limit inner seal ring 13 relative to
Exterior seal ring 12 moves right, not only compact conformation, so that keep suitable between exterior seal ring 12 and inner seal ring 13
Gap, to ensure smoothness in relative rotation between derailing wheel 2 and support shaft 3.
During adjusting at the automatic rerail of rolling stock, between derailing wheel 2 and support shaft 3, strong rushing can be produced
Hit effect, for that purpose it is necessary to guarantee and improve the bend resistance of support shaft 3 itself, shock resistance mechanical strength.It is middle carbon in view of 45 steel
Structural steel, its mechanical performance, cold and hot working performance are all preferable, and price is low, source wide, therefore, the support shaft 3 in the present embodiment
Can select 45 steel machine-shapings, and carry out Tempering and Quenching, its concrete hardening and tempering process comprises the steps:
1st step, is heated to 880 DEG C-900 DEG C by support shaft 3, common heating-up temperature value is 880 DEG C, 885 DEG C, 890
DEG C, 895 DEG C or 900 DEG C, general capping value.Because higher hardening heat can make the firing rate of support shaft 3 workpiece
Accelerate, and surface oxidation reduces, and work efficiency can be improved.
2nd step, carries out isothermal holding to support shaft 3, its temperature retention time be usually 20min, 21min, 22min, 23min,
24min or 25min, its purpose is to make the austenite homogenization in support shaft 3 workpiece.It should be noted that at this
Temperature retention time can not be long, in case the crystal grain in support shaft 3 workpiece is excessive.
3rd step, carries out twice cooling process to support shaft 3.Specifically:
First, use NaCl saline solution that support shaft 3 is cooled down；Owing to 45 steel hardenabilities are low, therefore use cooling speed
Spend big NaCl saline solution support shaft 3 is cooled down, the concentration of described NaCl saline solution is usually 8%, 9%, 10%,
11%, 12%.After described support shaft 3 workpiece enters water, it should through hardening rather than cold.If support shaft 3 workpiece is at NaCl salt
In aqueous solution cold, it is possible to make support shaft 3 workpiece ftracture, this is because, when support shaft 3 workpiece is in NaCl saline solution
When being cooled to about 180 DEG C, austenite therein is rapidly converted into martensite, thus causes caused by excessive structural stress.For
This, it is common that use NaCl saline solution that support shaft 3 workpiece is cooled to 180-190 DEG C.
Then, at support shaft 3 workpiece after above-mentioned NaCl saline solution cooling, then go out water-air cooling or oil be cooled to from
So temperature.Owing to coolant-temperature gage is difficult to grasp, can treat when support shaft 3 workpiece being carried out NaCl saline solution cooling and processing
After shake in NaCl saline solution stops, directly support shaft 3 workpiece is gone out water-air cooling or oil is cooled to natural temperature, quenched
The hardness requirement of support shaft 3 workpiece after process is HRC56-60, and so operation is conducive to improving the quenched place of support shaft 3 workpiece
Science and engineering is imitated.
3rd step, to quenching after support shaft 3 workpiece carry out high tempering, heating-up temperature be usually 560 DEG C, 570 DEG C, 580
℃、590℃、600℃.After the described support shaft 3 tempered process of workpiece, its hardness requirement is HBW252-302.
Use the hardening and tempering process of the present invention so that the mechanical strength of support shaft 3 in railway locomotive derailing device obtains
To be substantially improved, it is effectively improved the bend resistance of support shaft 3, impact strength, therefore, adjusts at the automatic rerail of rolling stock
During, it is ensured that the functional reliability that railway locomotive derailing device is overall.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, it is noted that all
Any amendment, equivalent and the improvement etc. made within the spirit and principles in the present invention, should be included in the guarantor of the present invention
Within the scope of protecting.
Claims (8)
1. the hardening and tempering process of a railway locomotive derailing support shaft, it is characterised in that: comprise the steps:
1st step, is heated to more than 880 DEG C by support shaft；
2nd step, carries out isothermal holding to support shaft；
3rd step, carries out 2 coolings and processes support shaft, first uses the cooling of NaCl saline solution, then goes out to be water-cooled to nature temperature
Degree, the hardness requirement of the support shaft after quenched process is HRC56-60；
4th step, carries out high tempering process to support shaft, and heating-up temperature is more than 560 DEG C, the support shaft after modifier treatment hard
Degree requires as HBW252-302.
The hardening and tempering process of a kind of railway locomotive derailing support shaft the most according to claim 1, it is characterised in that: described
In 1 step, support shaft is heated to 880 DEG C-900 DEG C.
The hardening and tempering process of a kind of railway locomotive derailing support shaft the most according to claim 1, it is characterised in that: described
In 2 steps, the temperature retention time of support shaft is 20min-25min.
The hardening and tempering process of a kind of railway locomotive derailing support shaft the most according to claim 1, it is characterised in that: described
In 3 steps, the NaCl saline solution concentration used is 8%-12%.
5. according to the hardening and tempering process of a kind of railway locomotive derailing support shaft described in claim 1 or 4, it is characterised in that:
In described 3rd step, use NaCl saline solution that support shaft is cooled to 180-190 DEG C.
6. according to the hardening and tempering process of a kind of railway locomotive derailing support shaft described in claim 1 or 4, it is characterised in that:
In described 3rd step, support shaft is first after NaCl saline solution cools down, then goes out water-air cooling or oil is cooled to natural temperature.
The hardening and tempering process of a kind of railway locomotive derailing support shaft the most according to claim 6, it is characterised in that: described
In 3 steps, when using NaCl saline solution that support shaft carries out cooling process, after the shake in NaCl saline solution stops, going out
Water-air cooling or oil are cooled to natural temperature.
The hardening and tempering process of a kind of railway locomotive derailing support shaft the most according to claim 1, it is characterised in that: described
In 4 steps, the heating-up temperature that support shaft carries out high tempering process is 560-600 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610621973.6A CN106065427A (en) | 2016-08-02 | 2016-08-02 | A kind of hardening and tempering process of railway locomotive derailing support shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610621973.6A CN106065427A (en) | 2016-08-02 | 2016-08-02 | A kind of hardening and tempering process of railway locomotive derailing support shaft |
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|---|---|
| CN106065427A true CN106065427A (en) | 2016-11-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610621973.6A Pending CN106065427A (en) | 2016-08-02 | 2016-08-02 | A kind of hardening and tempering process of railway locomotive derailing support shaft |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108424999A (en) * | 2018-04-27 | 2018-08-21 | 宁夏石炭井炭化实业公司 | A kind of heat treatment process of shallow-tank separator driving chain parts |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85104854A (en) * | 1985-06-21 | 1987-01-28 | 武进齿轮厂 | No. 45 steel fine module gear forged harding technology and quenching machine |
| CN101186963A (en) * | 2007-12-17 | 2008-05-28 | 国网北京电力建设研究院 | Heat treatment technique of high strength anchor bolt for extra-high voltage transmission line rod tower |
| CN101886158A (en) * | 2010-07-13 | 2010-11-17 | 烟台首钢东星集团有限公司 | Shaft lever part for engineering machinery and manufacturing method thereof |
| CN103498026A (en) * | 2013-09-26 | 2014-01-08 | 无锡阳工机械制造有限公司 | Quenching method of 45# steel workpiece |
| CN103894789A (en) * | 2012-12-28 | 2014-07-02 | 大连瓦特重机床有限公司 | Machine tool spindle machining method |
| CN105714027A (en) * | 2014-12-04 | 2016-06-29 | 重庆聆益机械有限公司 | Heat treatment process for hardening and tempering of 45 steel |
-
2016
- 2016-08-02 CN CN201610621973.6A patent/CN106065427A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85104854A (en) * | 1985-06-21 | 1987-01-28 | 武进齿轮厂 | No. 45 steel fine module gear forged harding technology and quenching machine |
| CN101186963A (en) * | 2007-12-17 | 2008-05-28 | 国网北京电力建设研究院 | Heat treatment technique of high strength anchor bolt for extra-high voltage transmission line rod tower |
| CN101886158A (en) * | 2010-07-13 | 2010-11-17 | 烟台首钢东星集团有限公司 | Shaft lever part for engineering machinery and manufacturing method thereof |
| CN103894789A (en) * | 2012-12-28 | 2014-07-02 | 大连瓦特重机床有限公司 | Machine tool spindle machining method |
| CN103498026A (en) * | 2013-09-26 | 2014-01-08 | 无锡阳工机械制造有限公司 | Quenching method of 45# steel workpiece |
| CN105714027A (en) * | 2014-12-04 | 2016-06-29 | 重庆聆益机械有限公司 | Heat treatment process for hardening and tempering of 45 steel |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108424999A (en) * | 2018-04-27 | 2018-08-21 | 宁夏石炭井炭化实业公司 | A kind of heat treatment process of shallow-tank separator driving chain parts |
| CN108424999B (en) * | 2018-04-27 | 2019-08-30 | 宁夏石炭井炭化实业公司 | A kind of heat treatment process of shallow-tank separator driving chain components |
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Application publication date: 20161102 |