CN109986035A - A kind of big ingot casting hole irrigation method of metal - Google Patents
A kind of big ingot casting hole irrigation method of metal Download PDFInfo
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- CN109986035A CN109986035A CN201711480802.7A CN201711480802A CN109986035A CN 109986035 A CN109986035 A CN 109986035A CN 201711480802 A CN201711480802 A CN 201711480802A CN 109986035 A CN109986035 A CN 109986035A
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- casting
- ingot casting
- poured
- metal
- target component
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D7/00—Casting ingots, e.g. from ferrous metals
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Abstract
The purpose of the present invention is to provide a kind of pouring technologies of large scale cast metals.The technique uses multiple hole irrigation method, one ingot casting is cast completion several times, when the molten steel for being poured certain altitude into mold, after solidifying a period of time, continuation is poured from top to shrinkage cavity and non-densified regions, the metal molten that the amount of the degree of superheat and injection molten steel that control the molten metal of casting solidifies the heat brought into will unevenly, it is higher than the target component of ingot casting with the segregation element ingredient of the metallic solution of stylish injection, the ingredient when molten metal newly injected and again molten metal mixing is made to meet the target component of ingot casting.It is full until pouring mold to repeat the above casting process.The segregation index of element can be controlled to 0 by this technique, the control of loose and shrinkage cavity index is at 0.5 grade or less.
Description
Technical field
The present invention relates to a kind of pouring technology-pouring techniques of the big ingot casting of metal, belong to metallurgical casting field, the pourer
Skill can correct shrinkage cavity and the rarefaction defect of element segregation, reduction ingot casting in ingot casting, significantly improve the quality of large scale ingot casting.
Background technique
Permanent mold casting is a kind of important method of casting.The casting good mechanical property of permanent mold casting production, surface essence
Degree and highly polished, quality and dimensionally stable, casting process recovery rate is high, and liquid metals consumption is few, high production efficiency, and gold
The genotype service life is long, and working environment is good, and labor intensity is small.In recent years, with the development of the industries such as forging industry, electric power, large scale
Favor of the ingot casting increasingly by market, in large scale ingot casting casting process element segregation, shrinkage cavity, it is loose the problems such as also more
Add protrusion.
Element solubility different in solid liquid phase causes the segregation of element, and element segregation will lead to product at subsequent thermal
There is nonuniform organization transformation during reason, intermediate annealing, to occur brittle fracture in the processing of next step and become useless
Product, therefore its harm is especially serious.Shrinkage cavity and it is loose be ingot casting from liquid phase into solid phase transition process molten steel volume contraction and draw
The defect risen.Shrinkage cavity and the loose compactness for seriously affecting ingot casting, reduce the effective sectional area of ingot casting, drop mechanical property significantly
It is low.Or even the ingot casting for not cutting off existing defects part of having in some cases, have to scrap steel ingot when defect is serious, give
Production brings huge economic loss.
In addition to then cutting off powder injection molding to riser, no extraordinary method is gone up at present to control large scale ingot casting
The segregation of middle element, loose and shrinkage cavity.The invention patent is poured large scale ingot casting using multiple point pouring technique, on the one hand can be with
Element segregation is corrected, on the other hand can also control shrinkage cavity and loose very well.
Summary of the invention
The purpose of the present invention is to provide one kind can correct component segregation, reduces loose and shrinkage cavity pouring technology, mould
Casting casting divides 3-5 completion, and casting is directly poured to rejected region using long nozzle；First time casting molten metal ingredient
For the target component of ingot casting, melt ingredient of casting later is below target component, the segregated solidification metal for being allowed to and melting again
Reach target component after mixing.
The present invention can correct the component segregation of solidification part by multiple hole irrigation, substantially reduce loose and shrinkage cavity, and
And present device investment is low, technique is easy to accomplish.
Specific embodiment
The invention uses multiple hole irrigation method, when the molten steel for being poured certain altitude into mold, can be divided into 4 areas in mold
Domain: 1 is even solidification region；2 element segregation solidification zones；3) shrinkage cavity, loose domain of the existence；It 4) is casting region.One section of solidification
After time, continuation is poured from top to 3 regions, and the amount of the degree of superheat and injection molten steel that control the molten metal of casting makes band
The metal molten that the heat entered solidifies region 2 is higher than the mesh of ingot casting with the segregation element ingredient of the metallic solution of stylish injection
Ingredient is marked, ingredient meets the target component of ingot casting when mixing the molten metal newly injected and the molten metal in 2nd area.Repeat with
Upper process is full until pouring mold.
Embodiment 1
Illustrate the implementation method of hole irrigation method for being poured a 100t carbon target content as the high-carbon steel ingot casting of 1.05.% first.
Casting needs to connect casting complete using two ladles, and the one packet carbon content of molten steel that two kinds of carbon contents are got out before casting is mesh
Mark ingredient, another packet carbon content lower than target component selected in implementation process then carbon content be 0.95%.It is first poured for the first time
70t molten steel, the content that then sampling measures line of segragation what is said or talked about rapidly is 1.1%, and segregation zones account for about the one third volume of ingot casting,
25t molten steel is poured again for the second time in order to reach the amendment of segregation zones carbon, and the content that casting terminates to measure line of segragation carbon is
1.08%, so third time is poured 0.95% molten steel 5t again.Finally obtaining the carbon content at ingotism is 1.06%, in ingot casting
Do not find central pipe.
Embodiment 2
The weight of ingot casting is 170t, and carbon target content is 2.0%.Casting needs to connect casting complete using two ladles, in casting
Before be ready to two kinds of carbon contents one packet carbon content of molten steel be target component, another packet carbon content be lower than target component, implementing
Select in the process then carbon content be 1.8%.
It is first poured 75t molten steel for the first time, the content that then sampling measures line of segragation carbon rapidly is 2.5%, and segregation zones account for about
The one third volume of ingot casting is poured 60t molten steel to reach the amendment of segregation zones carbon again for the second time, and casting terminates to measure partially
The content for analysing area's carbon is 2.3%, and the segregation generated when in order to correct second of casting, third time is poured 1.8% molten steel 30t again,
Obtaining carbon content at ingotism is 2.1%, in order to correct the segregation generated when third time is poured, is poured 5t again the 4th time, most
Obtaining the carbon content at ingotism afterwards is 2.02%, without discovery central pipe no in discovery central pipe ingot in ingot casting.
Embodiment 3
The weight of ingot casting is 265t, and carbon target content is 3.0%.Casting needs to connect casting complete using two ladles, in casting
Before be ready to two kinds of carbon contents one packet carbon content of molten steel be target component, another packet carbon content be lower than target component, implementing
Select in the process then carbon content be 2.8%.It is first poured 90t molten steel for the first time, the content that then rapid sampling measures line of segragation carbon is
3.6%, segregation zones account for about the one third volume of ingot casting, are poured 90t steel again for the second time to reach the amendment of segregation zones carbon
Water, the content that casting terminates to measure line of segragation carbon is 3.4%, and the segregation generated when in order to correct second of casting, third time is poured again
The molten steel 60t of note 2.8%, obtaining the carbon content at ingotism is 3.2%, in order to correct the segregation generated when third time is poured,
It is poured 20t again 4th time, obtaining the carbon content at ingotism is 3.1%, in order to correct the segregation generated when the 4th casting,
The 5th is poured 5t again, and finally obtaining the carbon content at ingotism is 3.03.%, does not have in no discovery central pipe ingot in ingot casting
It is found central pipe.
The above disclosure is just a few specific examples of the present application, however, this application is not limited to this, any this field
Technical staff can think variation, should all fall in the protection domain of the application.
Claims (1)
1. a kind of big ingot casting hole irrigation method of metal, it is characterized in that molding casting divides 3-5 completion, casting use long nozzle directly to
Rejected region is poured；First time casting molten metal ingredient is the target component of ingot casting, and melt ingredient of casting later is low
In target component, it is allowed to and reaches target component after the segregated solidification metal mixed that melts again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711480802.7A CN109986035A (en) | 2017-12-29 | 2017-12-29 | A kind of big ingot casting hole irrigation method of metal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711480802.7A CN109986035A (en) | 2017-12-29 | 2017-12-29 | A kind of big ingot casting hole irrigation method of metal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109986035A true CN109986035A (en) | 2019-07-09 |
Family
ID=67109815
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711480802.7A Pending CN109986035A (en) | 2017-12-29 | 2017-12-29 | A kind of big ingot casting hole irrigation method of metal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109986035A (en) |
-
2017
- 2017-12-29 CN CN201711480802.7A patent/CN109986035A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190709 |