CN107900287B - North-America standard self-protected tub high manganese steel frog casting technique - Google Patents
North-America standard self-protected tub high manganese steel frog casting technique Download PDFInfo
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- CN107900287B CN107900287B CN201711079242.4A CN201711079242A CN107900287B CN 107900287 B CN107900287 B CN 107900287B CN 201711079242 A CN201711079242 A CN 201711079242A CN 107900287 B CN107900287 B CN 107900287B
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- Prior art keywords
- frog
- technique
- high manganese
- riser
- manganese steel
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
- B22C9/088—Feeder heads
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/04—Influencing the temperature of the metal, e.g. by heating or cooling the mould
Abstract
A kind of North-America standard self-protected tub high manganese steel frog casting technique, it is characterized in that, including following technique: toe end of frog opening position technique: opening up riser subsidy in toe-end opening, gradient is by the 1:10-30 design of falling draft, and it is used cooperatively insulated feeder, bright chill cooperation chromite sand chilling technology is taken, and passes through molten steel Quench；Central body of frog is connected position technique with heel end interval iron: the position is implanted into the bright chill of special molding, and chill structure and casting structure are completely closely connected；Railway frog guard rail opening technique: riser is set in the structure in two angle steel joints of center portion position and is subsidized, two sides gradient is subsidized by the positive draft design of 1:5 and 1:20, design heat preservation riser, the self-protected tub high manganese steel frog made by new process, first is that North America self-protected tub high manganese steel frog Internal Quality of Cast can satisfy standard requirements, second is that being able to solve the useless casting flaw of the causes such as stomata, slag inclusion, shrinkage cavity existing for the self-protected tub high manganese steel frog casting of North America, railway frog casting qualified rate is increased to 75% or more by 30% or so.
Description
Technical field
The present invention relates to novel high manganese steel frog manufacturing process more particularly to a kind of North-America standard self-protected tub high manganese steel frogs
Casting technique.
Background technique
China's production high manganese steel frog has had more than 40 years knowhows.Every monthly average produces more than 1200 roots, annual output
Up to 15000 high manganese steel frogs.The countries in the world such as products export North America, South Korea, Indonesia, Saudi Arabia, Egypt, Turkey, Hong Kong are each
Area, the standard of execution is up to more than ten.Currently, North America self-protected tub high manganese steel frog as the most important product of North America market it
One, internal soundness level (mainly being reflected by taking X-ray result) is not sufficiently stable, and is in a lower quality level.According to
Statistics, 2014 Nian Yici flaw detection qualification rates are 34.56%, and 2015 Nian Yici flaw detection qualification rates are 26.67%, and in January, 2016 is extremely
In March, 2017 primary flaw detection qualification rate is 29.33%.By counting 2014,2015 and 2016 North America self-guarded frog X
Ray film making situation, it is found that its defect is concentrated mainly on following three regio defects: the position shrinkage cavity of toe end of frog opening, guard rail are opened
Flangeway inner air vent and heart rail are connected position shrinkage cavity with heel end interval iron at mouthful.
Summary of the invention
The purpose of the present invention is to provide the casting flaws such as stomata, slag inclusion, shrinkage cavity existing for a kind of solution casting, make casting
Internal soundness meets the North-America standard self-protected tub high manganese steel frog casting technique of North-America standard requirement.
In order to solve the above technical problems, the present invention provides a kind of North-America standard self-protected tub high manganese steel frog casting technique,
It is characterized in that, including following technique:
Toe end of frog opening position technique:
Riser subsidy is opened up in toe-end opening, gradient is used cooperatively insulated feeder work by the 1:10-30 design of falling draft
Skill carries out molten steel Quench；
Central body of frog is connected position technique with heel end interval iron:
The position is implanted into bright chill, and chill structure and casting structure are completely closely connected；
Railway frog guard rail opening technique:
Riser is arranged in two angle steel joints of center portion position in the structure to subsidize, subsidy two sides gradient is just being pulled out by 1:5 and 1:20
Mould design, designs heat preservation riser.
Present invention improvement has, and the distance between described railway frog guard rail opening technique riser is 100mm-110mm.
Present invention improvement has, and the riser size that toe end of frog opening position technique opens up is 50mm*80mm.
Present invention improvement has, and the riser subsidy size that railway frog guard rail opening technique opens up is 100mm*80mm.
Present invention improvement has, and the diameter of the heat preservation riser is 150mm.
The present invention improvement have, central body of frog be connected with heel end interval iron position be implanted into the bright chill of special molding.
The invention has the benefit that the self-protected tub high manganese steel frog made by new process, first is that North America self preservation
Formula high manganese steel frog Internal Quality of Cast can satisfy standard requirements, second is that being able to solve North America self-protected tub high manganese steel frog casting
The causes such as existing stomata, slag inclusion, shrinkage cavity are given up casting flaw, and railway frog casting qualified rate is increased to 75% or more by 30% or so.
Detailed description of the invention
Attached drawing 1 is the structural schematic diagram of North-America standard self-protected tub high manganese steel frog of the invention；
Label declaration: A- toe end of frog opening position；B- central body of frog is connected position with heel end interval iron；C- railway frog guard rail
Opening.
Specific embodiment
In order to describe the technical content, the structural feature, the achieved object and the effect of this invention in detail, below in conjunction with embodiment
And attached drawing is cooperated to be explained in detail.
The present invention provides a kind of North-America standard self-protected tub high manganese steel frog casting technique, including following technique: toe end of frog
Be open position technique, and central body of frog is connected position technique with heel end interval iron, railway frog guard rail opening technique.
Other techniques are consistent with traditional technique, and the application is simultaneously not particularly limited, and the present invention stresses that three go out to ask
The technique of topic, specific as follows:
Toe end of frog opening position technique:
Referring to the area A in attached drawing 1, in traditional technique, the work of bright chill cooperation chromite sand Quench is taken at this
Skill measure, thinking be shrinkage cavity is eliminated by molten steel Quench, but it is actually detected the result shows that effect is bad, shrinkage cavity defect is serious,
Easily there is shrinkage cavity defect for toe end of frog opening position, it is believed that the origin cause of formation of defect is in toe-end opening solidification shrinkage process
In there is no enough molten steel to carry out effective feeding the position caused by.Newly-designed technique changes the think of that Quench eliminates shrinkage cavity
Road takes riser feeding to eliminate shrinkage cavity defect.
That is, opening up the riser subsidy of 50mm*80mm in toe-end opening, gradient is by the 1:20 design of falling draft, and cooperation makes
With insulated feeder, molten steel Quench is carried out.
Central body of frog is connected position technique with heel end interval iron:
Referring to the area B in attached drawing 1, in traditional technique, targetedly technological measure is not taken at this, is relied solely on
Teeming measure is poured to eliminate the shrinkage cavity defect at this, this way is affected by human factors very greatly, so testing result shows
It is very unstable for the quality condition at this.
There is shrinkage cavity defect and is analyzed in the position that is connected for central body of frog with heel end interval iron, since the portion structure is multiple
It is miscellaneous, it is unfavorable for carrying out feeding using existing chill or riser.
Newly-designed technique thinking is to change original the case where examining artificial control quality, and design specialized forms bright chill work
Skill carries out Quench to rejected region, and chill structure and casting structure are completely closely connected, and realization not only solves shrinkage cavity defect, but also does not change casting
Part primary structure shape.
That is, the position is implanted into the bright chill of special molding, chill structure and casting structure are completely closely connected；
Railway frog guard rail opening technique:
Referring to the area C in attached drawing 1, in traditional handicraft, flangeway back side is provided with 1 riser subsidy at this, and cooperation makes
With the heat preservation riser of diameter 150mm, radioscopy is the result is that there are a large amount of intensive stomata and slag inclusions for flangeway at this
Defect.
Why North America self-guarded frog thinks it is because guard rail be open in a large amount of defects of guard rail aperture position appearance
Position and front and back position assume diamond in shape structure, are exactly in the center of diamond structure.In casting process, with molten steel flow side
To, first is that gas gathers here, and because planform becomes narrow gradually, gas can not exclude in time again.Second is that casting process
In, so far, the molten steel of middle section (i.e. at heart rail) quickly fills type to molten steel flow, and two sides guard rail opening molten steel is driven to be formed
Whirlpool, so that gas and impurity gather here, so foring intensive stomata or dreg defect.
Newly-designed technique and effect are as follows:
(1) there is intensive gas hole defect in guard rail aperture position, take two angle steel joints of center portion position in the structure
Upper setting 100mm*80mm riser subsidy.
(2) subsidy two sides gradient is by the positive draft design of 1:5 and 1:20.
(3) process program of design diameter 150mm heat preservation riser, reach delayed coagulation, bleed, exhaust, slagging-off
Effect.
(4) guarantee that the distance between riser is 100mm-110mm, guarantee effectively feeding distance.
The above description is only an embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure or equivalent flow shift made by bright specification and accompanying drawing content is applied directly or indirectly in other relevant skills
Art field, is included within the scope of the present invention.
Claims (5)
1. a kind of North-America standard self-protected tub high manganese steel frog casting technique, which is characterized in that including following technique:
Toe end of frog opening position technique:
Riser subsidy is opened up in toe-end opening, gradient is used cooperatively insulated feeder technique by the 1:10-30 design of falling draft,
Carry out molten steel Quench；
Central body of frog is connected position technique with heel end interval iron:
The position is implanted into bright chill, and chill structure and casting structure are completely closely connected；
Railway frog guard rail opening technique:
Riser is arranged in two angle steel joints of center portion position in the structure to subsidize, subsidy two sides gradient is set by the positive draft of 1:5 and 1:20
Meter designs heat preservation riser.
2. North-America standard self-protected tub high manganese steel frog casting technique according to claim 1, which is characterized in that the railway frog
The distance between guard rail opening technique riser is 100mm-110mm.
3. North-America standard self-protected tub high manganese steel frog casting technique according to claim 1, which is characterized in that toe end of frog
The riser subsidy size that opening position technique opens up is 50mm*80mm.
4. North-America standard self-protected tub high manganese steel frog casting technique according to claim 1, which is characterized in that railway frog guard rail
The riser subsidy size that opening technique opens up is 100mm*80mm.
5. North-America standard self-protected tub high manganese steel frog casting technique according to claim 1, which is characterized in that the fever
The diameter of insulated feeder is 150mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711079242.4A CN107900287B (en) | 2017-11-06 | 2017-11-06 | North-America standard self-protected tub high manganese steel frog casting technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711079242.4A CN107900287B (en) | 2017-11-06 | 2017-11-06 | North-America standard self-protected tub high manganese steel frog casting technique |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107900287A CN107900287A (en) | 2018-04-13 |
| CN107900287B true CN107900287B (en) | 2019-05-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711079242.4A Active CN107900287B (en) | 2017-11-06 | 2017-11-06 | North-America standard self-protected tub high manganese steel frog casting technique |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU749541A1 (en) * | 1977-12-14 | 1980-07-23 | Днепропетровский Ордена Трудового Красного Знамени Металлургический Институт | Casting mould for casting railroad crosspiece |
| US4824055A (en) * | 1987-02-02 | 1989-04-25 | Nortrak Limited | Railroad FROG |
| CN1583324A (en) * | 2004-06-04 | 2005-02-23 | 中国科学院金属研究所 | High manganese steel railway assembled frog centre rail casting process |
| CN1632223A (en) * | 2004-12-24 | 2005-06-29 | 中国科学院金属研究所 | Combined railway steel frog nose rail manufacturing process |
| CN101491829A (en) * | 2009-02-20 | 2009-07-29 | 中国科学院金属研究所 | Casting technique of grain refined solid manganese steel frog of long life |
-
2017
- 2017-11-06 CN CN201711079242.4A patent/CN107900287B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU749541A1 (en) * | 1977-12-14 | 1980-07-23 | Днепропетровский Ордена Трудового Красного Знамени Металлургический Институт | Casting mould for casting railroad crosspiece |
| US4824055A (en) * | 1987-02-02 | 1989-04-25 | Nortrak Limited | Railroad FROG |
| CN1583324A (en) * | 2004-06-04 | 2005-02-23 | 中国科学院金属研究所 | High manganese steel railway assembled frog centre rail casting process |
| CN1632223A (en) * | 2004-12-24 | 2005-06-29 | 中国科学院金属研究所 | Combined railway steel frog nose rail manufacturing process |
| CN101491829A (en) * | 2009-02-20 | 2009-07-29 | 中国科学院金属研究所 | Casting technique of grain refined solid manganese steel frog of long life |
Non-Patent Citations (2)
| Title |
|---|
| 出口北美高锰钢辙叉铸造工艺设计;徐瑞祥;《铸造技术》;20020130;第23卷(第01期);40-41 |
| 高锰钢组合辙叉心轨铸造工艺的研究与应用;郗丽清等;《铁道技术监督》;20080515;第36卷(第05期);40-41,44 |
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| CN107900287A (en) | 2018-04-13 |
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