CN101524743A - Casting mould for producing hollow steel ingot and casting method thereof - Google Patents
Casting mould for producing hollow steel ingot and casting method thereof Download PDFInfo
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- CN101524743A CN101524743A CN200910059080A CN200910059080A CN101524743A CN 101524743 A CN101524743 A CN 101524743A CN 200910059080 A CN200910059080 A CN 200910059080A CN 200910059080 A CN200910059080 A CN 200910059080A CN 101524743 A CN101524743 A CN 101524743A
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Abstract
The invention discloses a casting mould for producing a hollow steel ingot and a casting method thereof. A combustible layer (4) is arranged between a steel component (2) and a refractory material layer (3) of the mould core (1) of the casting mould. The casting method is characterized in that: speed of teeming line of the ingot body of the hollow steel ingot is between 75 and 95mm/min; and speed of stuffing line of the cap part is between 30 and 60mm/min. In the hollow steel ingot produced by the casting mould and the casting method, defects of inner and outer surface cracks, internal pores, macroporosity and shrinkage cavity are effectively controlled, and rejection rate of the product is greatly reduced; and the mould has a simple structure, is easy for processing, and has low manufacture cost.
Description
Technical field
The present invention relates to steel ingot and water mold and casting method, especially a kind of produce hollow steel ingot water mold and casting method.
Background technology
The employing hollow steel ingot carries out tube rolling and makes tube, ring forgings, can avoid goods to produce bigger implosion and invagination defective, and reduce production cost.
At invention disclosed patent on the 11st CN 101195154A June in 2008, provide a kind of produce hollow steel ingot water mold and casting method.But, adopt this hollow steel ingot to water the hollow steel ingot that mold and casting method are produced, surfaces externally and internally crackle and internal porosity and macroscopic view are loose, shrinkage cavity defect is comparatively serious, cause the percent defective of product higher.
Summary of the invention
What technical problem to be solved by this invention provided a kind of production hollow steel ingot that can reduce hollow steel ingot surfaces externally and internally crackle and internal porosity defective waters mold and casting method.
In order to solve the problems of the technologies described above, the present invention adopts following technical scheme: a kind of mold that waters of producing hollow steel ingot, comprise ingot mould and core rod, and be provided with the incendivity layer between the steel member of described core rod and the refractory masses.
Described incendivity layer is lower than 160 ℃ fibre object by burning-point and fills and to constitute.
The end face of refractory masses is stretched out in the lower end of described steel member.
Described ingot mould is put together by upper die and lower die and base, and wherein counterdie places between patrix and the base.
The base center of described ingot mould offers the core rod installing hole.
The lower end annular of described upper die and lower die is evenly equipped with pre-embedded steel slab.
Be welded with locating piece on the outer surface of described pre-embedded steel slab.
The present invention produces the casting method of hollow steel ingot, and its step comprises: matched moulds, cast, cooling, the demoulding and level, and hollow steel ingot ingot body teeming line speed is 75～95mm/min, cap portion interstitial wire speed is 30～60mm/min.The casting liquid steel temperature is 1510～1570 ℃.The casting liquid steel temperature is 10～30 ℃.
The hollow steel ingot that adopts ingot mould of the present invention and casting method to produce, its surfaces externally and internally crackle and internal porosity and macroscopic view are loose, shrinkage cavity defect has obtained effective control, and the percent defective of product reduces greatly; And mould structure is simple and easy to processing, and is cheap for manufacturing cost.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
Fig. 1 is the structural representation that waters mold that the present invention produces hollow steel ingot;
Fig. 2 is the structural representation that waters the core rod of mold among the present invention.
Wherein, Reference numeral: 1 is core rod, and 2 is the steel member of core rod, 3 is the refractory masses of core rod, and 4 is the incendivity layer of core rod, and 5 is ingot mould, 6 is the patrix of ingot mould, and 7 is the counterdie of ingot mould, and 8 is the base of ingot mould, 9 is the core rod installing hole on the ingot mould base, and 10 is the pre-embedded steel slab in the upper die and lower die, and 11 is locating piece, 12 is base plate, 13 is feed trumpet, and 14 is the ingot mould die cavity, and 15 is hot top.
The specific embodiment
Disclosed all features in this specification, or the step in disclosed all methods or the process except mutually exclusive feature and/or step, all can make up by any way.
Disclosed arbitrary feature in this specification (comprising any accessory claim, summary and accompanying drawing) is unless special narration all can be replaced by other equivalences or the alternative features with similar purpose.That is, unless special narration, each feature is an example in a series of equivalences or the similar characteristics.
As shown in Figure 1, the mold that waters that the present invention produces hollow steel ingot comprises ingot mould 5, core rod 1, base plate 12 and feed trumpet 13, ingot mould 5 and feed trumpet 13 are installed on the base plate 12, and are uniform 2～8 groups of ingot moulds 5 and the core rod 1 of being equipped with in center with feed trumpet 13 on base plate 12 generally in order to improve casting efficient.
As shown in Figure 2, be provided with incendivity layer 4 between the steel member 2 of core rod 1 and the refractory masses 3, incendivity layer 4 is lower than 160 ℃ fibre object by burning-point and fills and to constitute, when carrying out the hollow steel ingot cast, the heat of molten steel is delivered to incendivity layer 4 by the refractory masses 3 of core rod, thereby cause the burning of fiberfill fibers thing, its volume-diminished of burning back; When hollow steel ingot solidified, middle hole surface shrank to the axis direction, owing to provide one after 4 burning of incendivity layer for the inside space of shrinking of steel ingot, thus reduced the shrinkage stress of steel ingot, thus the crack defect of the surfaces externally and internally of hollow steel ingot reduced.In addition, in incendivity layer 4 combustion process, absorbed part,, thereby reduced the gas hole defect in the steel ingot as carbon monoxide, hydrogen, nitrogen etc. by the gas that refractory masses 3 is subjected to high temperature to volatilize and decomposite.Simultaneously, consider cost and the factor of drawing materials, above-mentioned fibre object can be selected straw, the rope made of hemp or cloth etc. for use.
As depicted in figs. 1 and 2, core rod 1 is installed on the base 8 of ingot mould 5, and for the present invention that makes things convenient for who installs is designed to the end face that refractory masses 3 is stretched out in its lower end with the steel member 2 of core rod 1, its exposed length is decided on the total length of core rod; Correspondingly, offer the core rod installing hole 9 that matches with steel member 2 at base 8 centers of ingot mould 5.Can adopt the form of threaded engagement between steel member 2 and the core rod installing hole 9.
As shown in Figure 1, ingot mould 5 is put together by patrix 6, counterdie 7 and base 8, and wherein counterdie (7) places between patrix 6 and the base 8, so very helps the position correction of ingot mould 5 and the installation and the rectify perpendicular of core rod 1; The lower end annular of patrix 6 and counterdie 7 is evenly equipped with pre-embedded steel slab 10, be welded with locating piece 11 on the outer surface of pre-embedded steel slab 10, locating piece 11 plays the matched moulds location, reliable in order to guarantee that locating piece is connected on patrix 6 and counterdie 7, so the lower end annular at patrix 6 and counterdie 7 is evenly equipped with pre-embedded steel slab 10, to improve the welding performance of locating piece 11.Only need during matched moulds so earlier counterdie 7 is covered on the base 8, patrix 6 is covered on the counterdie 7 get final product again.
The present invention produces the casting method of hollow steel ingot, adopts above-mentioned ingot mould, is the method for making a bet during casting, and its step comprises: cast, cooling, the demoulding and level, above operation is traditional handicraft.But, be dense internal organization and the surface quality of guaranteeing steel ingot, avoid steel ingot to produce the loose and shrinkage cavity of macroscopic view, hollow steel ingot ingot body teeming line speed is 75～95mm/min, cap portion interstitial wire speed is 30～60mm/min.Simultaneously, according to the component difference of molten steel, determine that the casting liquid steel temperature is 1520～1570 ℃.The casting molten steel overheat is 10～30 ℃, if the degree of superheat of molten steel is too big, the thermal stress in the time of can causing ingot solidification increases, thereby causes steel ingot crack defect to occur.In addition, when cast, hot top 15 is stamped on the top of ingot mould die cavity 14.
The present invention is not limited to the aforesaid specific embodiment.The present invention expands to any new feature or any new combination that discloses in this manual, and the arbitrary new method that discloses or step or any new combination of process.
Claims (10)
1, a kind of mold that waters of producing hollow steel ingot comprises ingot mould (5) and core rod (1), it is characterized in that: be provided with incendivity layer (4) between the steel member (2) of described core rod (1) and the refractory masses (3).
2, production hollow steel ingot according to claim 1 water mold, it is characterized in that: described incendivity layer (4) is lower than 160 ℃ fibre object by burning-point and fills and constitute.
3, production hollow steel ingot according to claim 1 water mold, it is characterized in that: the end face of refractory masses (3) is stretched out in the lower end of described steel member (2).
4, production hollow steel ingot according to claim 1 water mold, it is characterized in that: described ingot mould (5) is put together by patrix (6), counterdie (7) and base (8), wherein counterdie (7) places between patrix (6) and the base (8).
5, production hollow steel ingot according to claim 4 water mold, it is characterized in that: base (8) center of described ingot mould (5) offers core rod installing hole (9).
6, production hollow steel ingot according to claim 4 water mold, it is characterized in that: the lower end annular of described patrix (7) and counterdie (7) is evenly equipped with pre-embedded steel slab (10).
7, production hollow steel ingot according to claim 6 water mold, it is characterized in that: be welded with locating piece (11) on the outer surface of described pre-embedded steel slab (10).
8, a kind ofly adopt the casting method that mold is produced hollow steel ingot that waters as claimed in claim 1, its step comprises: matched moulds, cast, cooling, the demoulding and level, it is characterized in that: hollow steel ingot ingot body teeming line speed is 75～95mm/min, and cap portion interstitial wire speed is 30～60mm/min.
9, the casting method of production hollow steel ingot according to claim 8 is characterized in that: the casting liquid steel temperature is 1510～1570 ℃.
10, the casting method of production hollow steel ingot according to claim 8 is characterized in that: the casting liquid steel temperature is 10～30 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910059080A CN101524743A (en) | 2009-04-27 | 2009-04-27 | Casting mould for producing hollow steel ingot and casting method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910059080A CN101524743A (en) | 2009-04-27 | 2009-04-27 | Casting mould for producing hollow steel ingot and casting method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN101524743A true CN101524743A (en) | 2009-09-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910059080A Pending CN101524743A (en) | 2009-04-27 | 2009-04-27 | Casting mould for producing hollow steel ingot and casting method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102451892A (en) * | 2010-10-25 | 2012-05-16 | 丹阳市精密合金厂有限公司 | Vacuum casting die assembly |
| CN103639365A (en) * | 2013-12-12 | 2014-03-19 | 江苏精工特种材料有限公司 | Combined type special steel casting die |
| CN114433796A (en) * | 2022-02-14 | 2022-05-06 | 王小川 | High-efficiency pouring ingot mold structure and pouring process |
-
2009
- 2009-04-27 CN CN200910059080A patent/CN101524743A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102451892A (en) * | 2010-10-25 | 2012-05-16 | 丹阳市精密合金厂有限公司 | Vacuum casting die assembly |
| CN103639365A (en) * | 2013-12-12 | 2014-03-19 | 江苏精工特种材料有限公司 | Combined type special steel casting die |
| CN114433796A (en) * | 2022-02-14 | 2022-05-06 | 王小川 | High-efficiency pouring ingot mold structure and pouring process |
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Open date: 20090909 |