CN201500775U - Protective casting device for Eutech steel mould casting - Google Patents
Protective casting device for Eutech steel mould casting Download PDFInfo
- Publication number
- CN201500775U CN201500775U CN200920228420XU CN200920228420U CN201500775U CN 201500775 U CN201500775 U CN 201500775U CN 200920228420X U CN200920228420X U CN 200920228420XU CN 200920228420 U CN200920228420 U CN 200920228420U CN 201500775 U CN201500775 U CN 201500775U
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- steel
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- casting
- passage
- eutech
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Abstract
The utility model relates to a protective casting device for Eutech steel mould casting, comprising a cylindrical cover body. An inlet inosculated with the size of a steel ladle water outlet is arranged at the top of the cover body. The protective casting device for Eutech steel mould casting is characterized in that the cover body is internally provided with an argon distributing passage which is internally provided with an intake pipe; a plurality of gas escaping holes are arranged on the passage; and a refractory material is covered on the lower edge of the cover body. In the utility model, air is isolated by implementing total argon protection to the strand naked in air to reduce secondary suction and oxidation of liquid steel and achieve the aim of reducing the impurity content and gas content in the steel. The device greatly improves the clarity and quality of steel, prolongs the service life of steel, ensures that protective casting is conducted to steel bars with different temperature, different steel types and different performance requirements, and improves the operating environment of workers.
Description
(1) technical field: the utility model relates to a kind of servicing unit that uses in the steel casting moulding process, specifically is excellent special steel die casting protection pouring device.
(2) prior art: after iron and steel fusing refining was intact, the degree of purity of molten steel and gas content were very low, but in the cast molding process, the molten steel casting stream that high-temperature liquid state molten steel mouth of a river under the refining ladle comes out to cast gate contacts with air, and airborne oxygen content accounts for 21%, and nitrogen content accounts for 78%, moisture content and other account for 1%, Fe in partial oxygen and the molten steel, Al, Si, Ca, element generation oxidation reactions such as Mn form corresponding oxide, produce a large amount of flue gases, and have partial oxide to enter in the steel; Part nitrogen also can be dissolved in the high-temperature molten steel; Water resolves into hydrogen under hot conditions and oxygen is dissolved in the high-temperature molten steel.
Be dissolved in the oxygen in the steel, reduce solubility with temperature and reduce, in solidification and crystallization process by using, Al in oxygen and the steel, Si, Ca, elements such as Mn form oxide, and this is the main source of nonmetal inclusion in the steel.Nitrogen forms very disperse in steel aluminium nitride is mingled with and thicker titanium nitride and titanium carbonitride.When hydrogen is reduced to crystallization temperature at molten steel temperature, solubility sharply reduces, the hydrogen of separating out is in solid-state hole, gap of spreading and gathering defective formation such as non-metallic inclusion down, after being combined into hydrogen molecule, the hydrogen atom of assembling produces great pressure, in case surpass the strength degree of steel, will produce implosion, form white point.
Oxide inclusions belongs to brittle substance in the steel, is adding when steel under the situation of deformation force (rolling, as to forge the punching press distortion), is easy to generate stress at the non-metallic inclusion place and concentrates, thereby crack; Steel because the thermal coefficient of expansion of metal (matrix) and field trash is different, produces at the interface at both and inlays stress in the pressure processing process or part heat treatment when heating, forms initial crack fatigue source, and the increase of field trash cracks increase the possibility in source.Therefore in the Ferrous Metallurgy production process, usually take the measure of omnidistance molten steel protection casting to handle.
Traditional die casting casting is not generally protected, even protective device is arranged, only is a simple clamshell, though the method is simple, has the following disadvantages:
1, casting stream is not protected and will be made that the mouth of a river produces the molten steel secondary oxidation to 200-300mm distance between the cast gate under the big bag, has increased gas and inclusion content in the steel.
When 2, casting stream need not be protected gas hood,, will make to produce negative pressure in the cover, also increase inspiratory capacity, quicken the oxidation of molten steel because the molten steel flow velocity is very big.
The oxide flue gas that produces when 3, casting stream is not protected casting is not a lot, and the molten steel that produces splashes, and easily scalds the people, and the worker laboring environment is relatively poor.
When 4, casting stream need not be protected gas hood, owing to increased the oxidation of molten steel, will produce more oxide flue gas, the worker laboring environment is poorer.
(3) summary of the invention: the purpose of this utility model just provides and a kind ofly can prevent secondary oxidation of steel and air-breathing in the molten steel casting cycle effectively, reduces gas content and inclusion content in the steel, improves the excellent special steel die casting protection pouring device of work situation.
Excellent special steel die casting protection pouring device of the present utility model, comprise a cylindrical cover body, the cover body top is provided with the import that coincide with ladle delivery port size, it is characterized in that: be provided with argon gas and distribute passage in cover body, air inlet pipe is housed in the passage, has some gas escape orifices on the passage; Be enclosed with refractory material at the cover body lower edge.
It is one to be arranged on the circular passage on cover body top that described argon gas distributes passage.
Described refractory material is the ceramic fibre brick.
Because molten steel temperature all more than 1450 ℃, adopts the metal of non-refractory to make cover body, with yielding, can not be repeatedly used, for the high temperature of preventing locking apparatus is out of shape for a long time, select steel material to make cover body;
Consider the sealing effectiveness between protective cover lower edge and the cast gate; adopt the air-locked ceramic fibre brick soft refractory of insulation; casting stream is carried out seal protection; both can avoid making cast gate alms bowl alms bowl mouth to crush or tumbled; cause molten steel to overflow loss; can avoid protective device and alms bowl mouth again not in one plane, cause sealing bad, the situation that does not reach casting stream protection effect occurs.
Adopt the gas gauge by-pass valve control, argon gas is evenly distributed around casting stream by the distribution passage after entering protective cover, and makes the interior pressure-fired that produces of cover, helps preventing entering of external oxygen.
The utility model comes secluding air by exposed aerial casting stream is implemented full argon shield, reduce the secondary suction and the oxidation of liquid steel, reach the purpose that reduces inclusion content of steel and gas content, wherein oxygen content drops to 5ppm by 10ppm, hydrogen content is dropped to below the 1ppm by 1.5ppm, nitrogen content drops to 45ppm by 80ppm, and B subclass field trash is reduced to 1.0 grades by 2.0 grades; Adopt this equipment to improve the clarity of steel greatly, corresponding quality and service life of having improved steel the steel that different temperatures, different steel grade and different performance require are protected casting, improved workman's operating environment.
During use; only need protective cover is removed to assigned address; the top inlet of this device is aligned the ladle delivery port, protective cover is installed in below, the mouth of a river, behind good bag; begin cast; adjust steel stream size to proper level, command the slowly small size decline ladle of overhead traveling crane once more, protective cover lower edge ceramic fibre brick is contacted with tapetum fibrosum around the cast gate alms bowl; open the protection argon gas, can realize the cast of steel stream full guard.
(4) description of drawings
Fig. 1 is the utility model structural representation;
Among the figure, the cylindrical cover body of 1-, the 2-import, the 3-annular is distributed passage, 4-air inlet pipe, 5-Pressure gauge, 6-gas escape orifice, 7-refractory material.
(5) specific embodiment: referring to Fig. 1, the utility model comprises a cylindrical cover body 1, and the cover body top is provided with the import 2 that coincide with ladle delivery port size, is provided with the argon gas annular and distributes passage 3 in cover body, and air inlet pipe 4 is housed in the passage; Be the control gas pressure, air inlet pipe is provided with Pressure gauge 5, has some gas escape orifices 6 on the circular passage; Be enclosed with ceramic fibre brick refractory material 7 at the cover body lower edge.
Claims (3)
1. excellent special steel die casting protection pouring device comprises a cylindrical cover body, and the cover body top is provided with the import that coincide with ladle delivery port size, it is characterized in that: be provided with argon gas and distribute passage in cover body, air inlet pipe is housed in the passage; Have some gas escape orifices on the passage; Be enclosed with refractory material at the cover body lower edge.
2. excellent special steel die casting protection pouring device according to claim 1 is characterized in that: it is one to be arranged on the circular passage on cover body top that described argon gas distributes passage.
3. excellent special steel die casting protection pouring device according to claim 1 and 2, it is characterized in that: described refractory material is the ceramic fibre brick.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920228420XU CN201500775U (en) | 2009-09-26 | 2009-09-26 | Protective casting device for Eutech steel mould casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920228420XU CN201500775U (en) | 2009-09-26 | 2009-09-26 | Protective casting device for Eutech steel mould casting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201500775U true CN201500775U (en) | 2010-06-09 |
Family
ID=42451717
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920228420XU Expired - Lifetime CN201500775U (en) | 2009-09-26 | 2009-09-26 | Protective casting device for Eutech steel mould casting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201500775U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108326260A (en) * | 2018-01-26 | 2018-07-27 | 济南韶欣耐磨材料有限公司 | A kind of manufacturing method of wear-resisting hammer head of hammer crusher |
| CN114367630A (en) * | 2021-12-21 | 2022-04-19 | 安徽富凯特材有限公司 | Coating for rare earth alloyed steel casting die and application thereof |
-
2009
- 2009-09-26 CN CN200920228420XU patent/CN201500775U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108326260A (en) * | 2018-01-26 | 2018-07-27 | 济南韶欣耐磨材料有限公司 | A kind of manufacturing method of wear-resisting hammer head of hammer crusher |
| CN114367630A (en) * | 2021-12-21 | 2022-04-19 | 安徽富凯特材有限公司 | Coating for rare earth alloyed steel casting die and application thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100609 |