CN102049476A - Technique method for inoculating and strengthening cylinder liner - Google Patents
Technique method for inoculating and strengthening cylinder liner Download PDFInfo
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- CN102049476A CN102049476A CN2009102133030A CN200910213303A CN102049476A CN 102049476 A CN102049476 A CN 102049476A CN 2009102133030 A CN2009102133030 A CN 2009102133030A CN 200910213303 A CN200910213303 A CN 200910213303A CN 102049476 A CN102049476 A CN 102049476A
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- casting
- inoculant
- inoculating
- technique
- silicon
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- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The invention provides a compound inoculating and strengthening technique for casting. The technical method adopted to solve the technical problems in the technique is as follows: adding a silicon-barium inoculant into a tundish, wherein the silicon content is not less than 72% and the specification is 3-5mm; pouring the inoculant into a casting ladle with furnace molten iron, so that the inoculant can be completely melted; adding a 0.15% silicon-strontium inoculant into a casting crucible and casting by stream inoculation at a temperature not less than 1,440 DEG C; and unloading a mould when the temperature of a blank is below 700 DEG C, thus the whole compound inoculating and strengthening technique for casting is completed. Such two inoculations can stabilize the metallographic structure of a cylinder liner and effectively change the form of graphite mainly for A-type graphite, increase the hardness appropriately and improve the tensile strength obviously. Also, the technique provided in the invention is stable.
Description
Affiliated technical field
The present invention relates to the inoculation strengthening technology in the cylinder jacket casting forming process.
Background technology
At present, scarcity day by day along with the energy and raw material problems, the demand of engine is to the development of high-power small size direction, thereby require very high to the mechanical performance of cylinder jacket, the cylinder jacket casting process of traditional idea can not satisfy new specification requirement, the metallographic structure of cylinder jacket, graphite form can not reach requirement, and the intensity of cylinder jacket is low, anti-wear performance is poor, service life is short, processing characteristics is also poor.
Summary of the invention
The invention provides a kind of inoculation strengthening cylinder jacket process, form compact and stable by the cylinder jacket metallographic matrix of this technology, hardness suitably increases, tensile strength obviously improves, yield rate improves, and casting process is stable also is convenient to operation simultaneously.
The present invention solves the technical method that its technical problem adopts: to the casting in the liner blank forming process with solidify and carry out inoculation, consider inoculation fade with the inoculation technology, subcontract and water the road junction and carry out silicon barium and breed for twice in smelting furnace.
The invention has the beneficial effects as follows that stablize, effectively changed graphite form by the cylinder cover metallographic structure of this casting inoculation strengthening technology melting casting, based on A type graphite, hardness suitably increases, tensile strength obviously improves process stabilizing.
Description of drawings.
The present invention does not have accompanying drawing.
Specific implementation method
Stove is interior according to the raw-material proportioning pig iron: foundry returns: steel scrap=feed intake at 5: 2: 3, use electro-smelting, in fusion process, check chemical composition in the time of 1400 ℃, and suitably adjust alloying element, be warming up to more than 1500 ℃ after meeting the requirements rapidly, in subcontract the silicon titanate innoculant of adding, wherein silicone content is not less than 72%, specification 3-5mm, and molten iron pours ladle inoculation through the stokehold, inovulant can fully fuse like this, but molten iron must be poured into a mould within 5 minutes and finish, and not so the pregnant effect slump of disastrous proportions of inovulant influences pregnant effect.Adding 0.15% silicon strontium inovulant in the casting crucible is not less than 1440 ℃ with temperature and adopts current-following inoculations to cast, be lower than 700 ℃ of depannings in the blank temperature, whole casting compound inoculation strengthening technology skill is finished, breeding for like this twice to make cylinder cover metallographic structure stablize, effectively change graphite form, based on A type graphite, hardness suitably increases, tensile strength obviously improves, and process stabilizing.
Claims (1)
1. inoculation strengthening cylinder jacket process is characterized in that: with the inoculation technology to the casting in the liner blank forming process with solidify and carry out inoculation,, subcontract and water the road junction in before smelting furnace and carry out silicon barium and breed for twice.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102133030A CN102049476A (en) | 2009-11-02 | 2009-11-02 | Technique method for inoculating and strengthening cylinder liner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102133030A CN102049476A (en) | 2009-11-02 | 2009-11-02 | Technique method for inoculating and strengthening cylinder liner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102049476A true CN102049476A (en) | 2011-05-11 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009102133030A Pending CN102049476A (en) | 2009-11-02 | 2009-11-02 | Technique method for inoculating and strengthening cylinder liner |
Country Status (1)
| Country | Link |
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| CN (1) | CN102049476A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102248132A (en) * | 2011-05-30 | 2011-11-23 | 日月重工股份有限公司 | Method for casting large stamping cylinder casting |
| CN103572139A (en) * | 2012-07-26 | 2014-02-12 | 广东省韶铸集团有限公司 | Composite inoculation method of small thin-wall castings |
| CN109702164A (en) * | 2018-12-17 | 2019-05-03 | 安徽雅思达汽车装备制造有限公司 | A kind of production method of precision cylinder sleeve of engine cubing accessory |
-
2009
- 2009-11-02 CN CN2009102133030A patent/CN102049476A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102248132A (en) * | 2011-05-30 | 2011-11-23 | 日月重工股份有限公司 | Method for casting large stamping cylinder casting |
| CN103572139A (en) * | 2012-07-26 | 2014-02-12 | 广东省韶铸集团有限公司 | Composite inoculation method of small thin-wall castings |
| CN103572139B (en) * | 2012-07-26 | 2016-09-28 | 广东省韶铸集团有限公司 | A kind of compound inoculated method of small thin-wall |
| CN109702164A (en) * | 2018-12-17 | 2019-05-03 | 安徽雅思达汽车装备制造有限公司 | A kind of production method of precision cylinder sleeve of engine cubing accessory |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110511 |