CN1042805C - Anti-oxidation method for inwall of steel pipe inlaid in casting - Google Patents
Anti-oxidation method for inwall of steel pipe inlaid in casting Download PDFInfo
- Publication number
- CN1042805C CN1042805C CN94110161A CN94110161A CN1042805C CN 1042805 C CN1042805 C CN 1042805C CN 94110161 A CN94110161 A CN 94110161A CN 94110161 A CN94110161 A CN 94110161A CN 1042805 C CN1042805 C CN 1042805C
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- China
- Prior art keywords
- steel pipe
- casting
- wall
- laid
- foundry goods
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The present invention discloses an oxidation preventing method for the inner wall of a steel pipe laid in a casting. In order to prevent the inner wall of a steel pipe laid in a casting from generating an iron oxide coating when the inner wall is baked at high temperature, nitrogen gas is led into the laid steel pipe in the processes of pouring the casting and cooling the casting; after the nitrogen gas is stopped from leading into the steel pipe, a pipe head of one end of the laid steel pipe is instantly sealed by a special protective cover to prevent air from entering into the steel pipe, and the non-oxidizing atmosphere can be maintained in the steel pipe; thus, the present invention can achieve the purposes that the iron oxide coating can not be generated on the inner wall of the steel pipe laid in the casting, and the inner wall of the steel pipe which needs to be treated by pickling can be omitted; thus, positive economic effects can be generated.
Description
The present invention relates to a kind of steel pipe embedding method.
When casting, need to be bumped into the steel pipe of cooling usefulness sometimes as required in foundry goods inside.When casting this class foundry goods, elder generation curves certain shape with the seamless steel pipe of certain diameter before cast, is placed in the casting mold and fixes, and pours into a mould then.The baking that is subjected to high-temperature liquid metal owing to the steel pipe that is bumped into foundry goods is scalded, air effect in the steel pipe in addition, cause the steel pipe inwall to produce very thick one deck iron scale, influence cooling water in the steel pipe to the cooling effect of foundry goods itself, and after long-term the use, the iron scale blocking pipe that comes off in the pipe, the service life of reducing foundry goods.Therefore, both at home and abroad about design and manufacturing sector, for example Kawasaki, Japan iron Co., Ltd. and Beijing Iron﹠Steel Design﹠Research Institute etc. clearly stipulate in technical conditions, must carry out pickling processes to the inwall of the steel pipe of inlaying in the foundry goods, to remove the iron oxide cortex.
At present, the method for the steel pipe inner wall oxide iron iron sheet layer of inlaying generally adopts the pickling processes method in the cleaning foundry goods.Because iron oxide cortex compact structure, thereby pickling is difficult to clean out, and also there is fragile foundry goods itself in pickling simultaneously, and troublesome poeration is wasted man-hour, problems such as consumption fund.
Inner wall oxide when the objective of the invention is to prevent the steel pipe castingin forms a kind of nonoxidizing atmosphere in steel pipe, make the steel pipe inwall not produce the iron oxide cortex, and then exempts acid cleaning process.
The object of the present invention is achieved like this: in pouring cast part and foundry goods cooling procedure, inlay feeding inert gas one nitrogen in the steel pipe to foundry goods, drive away the air in the steel pipe; After stopping logical nitrogen, with the end sealing of a privacy protection seal cover, avoid air to enter in the steel pipe at once with the edge steel pipe; Treat to take off when foundry goods is cooled to uniform temperature the privacy protection seal cover.
Use the steel pipe of this method castingin in the foundry goods, for example blast furnace cooling stave etc. can be removed from pickling cleaning edge inside pipe wall iron oxide cortex process, saves time, laborsaving, province's fund, not deterioration foundry goods.
Concrete grammar of the present invention is as follows:
The seamless steel pipe that earlier preparation is bumped into foundry goods is put in the casting mold on request and fixes, and the tube head at its two ends all is exposed at outside the sandbox, and tube head one end is connected with nitrogen pipeline, connects part and tightens used nitrogen pressure 〉=0.4MPa with joint.When beginning to cast, open the nitrogen pipeline valve, in the steel pipe that is bumped into, lead to nitrogen while pouring into a mould.The nitrogen that feeds can reclaim or emptying by the other end of tube head outside being exposed at sandbox.Pour and treat to stop after casting temperature is reduced to below 1150 ℃ logical nitrogen; at once pull out the sebific duct that connects tube head then; with of the other end sealing of privacy protection seal cover with steel pipe; in case enter air in the pipe; treat after casting temperature is reduced to below 500 ℃ the privacy protection seal cover to be taken off, so far finish the anti-oxidation technology of steel pipe inwall of inlaying in the foundry goods.
Claims (2)
1. steel pipe embedding method; it is characterized in that in pouring cast part and foundry goods cooling procedure, in the edge steel pipe, feeding nitrogen; after stopping to feed nitrogen in the edge steel pipe, the end with the edge steel pipe seals with the protection seal cover at once, takes off the protection seal cover when casting temperature is lower than 500 ℃.
2. a kind of steel pipe embedding method according to claim 1 is characterized in that an end of the steel pipe of inlaying should be when casting temperature is lower than 1150 ℃ with the sealing of protection seal cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94110161A CN1042805C (en) | 1994-03-28 | 1994-03-28 | Anti-oxidation method for inwall of steel pipe inlaid in casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94110161A CN1042805C (en) | 1994-03-28 | 1994-03-28 | Anti-oxidation method for inwall of steel pipe inlaid in casting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1107399A CN1107399A (en) | 1995-08-30 |
| CN1042805C true CN1042805C (en) | 1999-04-07 |
Family
ID=5034149
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN94110161A Expired - Fee Related CN1042805C (en) | 1994-03-28 | 1994-03-28 | Anti-oxidation method for inwall of steel pipe inlaid in casting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1042805C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110814282A (en) * | 2019-10-30 | 2020-02-21 | 本溪钢铁（集团）机械制造有限责任公司 | Method for preparing iron casting with cast-in steel pipe |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2943264B1 (en) * | 2009-03-17 | 2012-11-16 | Hispano Suiza Sa | MOLDED CASTER WITH REPORTED PIPES |
| CN103611920A (en) * | 2013-11-06 | 2014-03-05 | 中国北车集团大连机车车辆有限公司 | Casting-in method of steel pipe in casting |
| CN105154650A (en) * | 2015-08-21 | 2015-12-16 | 中国重型机械研究院股份公司 | Anti-oxidation technology for inner wall of high-quality steel pipe |
| CN106555651A (en) * | 2016-12-05 | 2017-04-05 | 柳州金创科技有限责任公司 | A kind of anti-oxidation automobile tail gas utilizing device |
| CN115491680A (en) * | 2022-09-29 | 2022-12-20 | 贵州安吉航空精密铸造有限责任公司 | Method for preventing stainless steel pipe in aluminum alloy casting from rusting |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3863701A (en) * | 1972-01-17 | 1975-02-04 | Toyota Motor Co Ltd | Process for manufacturing heat-insulated castings |
| CN87107433A (en) * | 1986-12-09 | 1988-06-22 | 艾尔坎国际有限公司 | The manufacturing of billet or pipe |
| CN1047235A (en) * | 1989-05-16 | 1990-11-28 | 曼内斯曼股份公司 | Manufacturing has the method for the hollow workpiece of clad |
-
1994
- 1994-03-28 CN CN94110161A patent/CN1042805C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3863701A (en) * | 1972-01-17 | 1975-02-04 | Toyota Motor Co Ltd | Process for manufacturing heat-insulated castings |
| CN87107433A (en) * | 1986-12-09 | 1988-06-22 | 艾尔坎国际有限公司 | The manufacturing of billet or pipe |
| CN1047235A (en) * | 1989-05-16 | 1990-11-28 | 曼内斯曼股份公司 | Manufacturing has the method for the hollow workpiece of clad |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110814282A (en) * | 2019-10-30 | 2020-02-21 | 本溪钢铁（集团）机械制造有限责任公司 | Method for preparing iron casting with cast-in steel pipe |
| CN110814282B (en) * | 2019-10-30 | 2021-09-21 | 本溪钢铁（集团）机械制造有限责任公司 | Method for preparing iron casting with cast-in steel pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1107399A (en) | 1995-08-30 |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |