CN101456065A - Composite incubation forging technique - Google Patents
Composite incubation forging technique Download PDFInfo
- Publication number
- CN101456065A CN101456065A CNA2007101915296A CN200710191529A CN101456065A CN 101456065 A CN101456065 A CN 101456065A CN A2007101915296 A CNA2007101915296 A CN A2007101915296A CN 200710191529 A CN200710191529 A CN 200710191529A CN 101456065 A CN101456065 A CN 101456065A
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- inoculation
- sic
- inoculant
- technology
- ladle
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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 compound inoculation melting and casting technology. In order to solve the technical problems, the invention adopts a technical method comprising the following steps: changing the prior pure once inoculation or twice inoculation, adding inoculant Sic into a melting furnace along with a trace alloy raw material to carry out inoculation in the furnace, adopting a front furnace ladle crushing method in a middle labiate ladle, and adding the SiC inoculant and silicon-strontium inoculant into the middle labiate ladle, wherein the Sic inoculant is added into a casting crucible to carry out inoculation also by adopting the crushing method before casting and shaping. The technology has the advantages that a metallographic tissue of a cylinder sleeve smelted and cast by the compound inoculation technology is stable; and the technology effectively changes form of graphite and gives priority to A type graphite, hardness is properly increased, tensile strength is remarkably improved, and the process is stable.
Description
Affiliated technical field
The present invention relates to the inoculated technology of cylinder jacket melting and casting cycle.
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, for this metallographic and mechanical performance to cylinder jacket requires very high, traditional cylinder jacket melting casting process can not satisfy new specification requirement, though once breed and late inoculation generally use in the melting casting cycle of cylinder jacket, but 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, poor processability.
Summary of the invention
The invention provides a kind of compound inoculated melting casting process, the cylinder cover metallographic structure by this compound inoculated melting casting process is stable, hardness suitably increases, tensile strength improves, and yield rate improves, and process stabilizing also is convenient to operation.
The present invention solves the technical method that its technical problem adopts: change original simple once breeding or late inoculation, adding inovulant SiC with the microalloy raw material in smelting furnace carries out breeding in the melting employing stove, in adopt in the bag of stokehold in subcontracting and pour method, adding SiC inovulant and silicon strontium inovulant, also is to adopt the method that pours that the SiC inovulant is added in the casting crucible to breed before cast molding.
The invention has the beneficial effects as follows that stablize, effectively changed graphite form by the cylinder cover metallographic structure of this compound inoculated technology melting casting, based on A type graphite, hardness suitably increases, tensile strength obviously improves process stabilizing.
Description of drawings.
The present invention is further illustrated below in conjunction with accompanying drawing.
Specific implementation method
Feed intake in the stove, according to raw-material proportioning be: the pig iron: foundry returns: steel scrap=5:2:3, inovulant adopts SiC and SrC, use electro-smelting, in fusion process, SiC with microalloy material adding 0.2%, carry out breeding in the stove, the check chemical composition is warming up to rapidly after meeting the requirements more than 1500 ℃ in the time of 1400 ℃, in subcontract and add 0.1% SiC and 0.3% silicon strontium inovulant, breed through the row stokehold, add 0.15 silicon strontium inovulant and be not less than 1440 ℃ with temperature and adopt current-following inoculations to cast in the casting crucible, be lower than 700 ℃ of depannings in the blank temperature, whole melting casting compound inoculated technology is finished.
Claims (1)
1, cylinder jacket melting casting compound inoculated technology, it is characterized in that: SiC breeds in smelting furnace, in subcontract and add SiC and silicon strontium inovulant and carry out the stokehold and breed, in casting ladle, add and breed before SiC waters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101915296A CN101456065A (en) | 2007-12-12 | 2007-12-12 | Composite incubation forging technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101915296A CN101456065A (en) | 2007-12-12 | 2007-12-12 | Composite incubation forging technique |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101456065A true CN101456065A (en) | 2009-06-17 |
Family
ID=40767347
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101915296A Pending CN101456065A (en) | 2007-12-12 | 2007-12-12 | Composite incubation forging technique |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101456065A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101823130A (en) * | 2010-05-14 | 2010-09-08 | 贵州英吉尔机械制造有限公司 | Composite covering agent and use method thereof in production of cylinder cover casting |
| CN102019376B (en) * | 2009-09-16 | 2012-09-05 | 天津新伟祥工业有限公司 | Automatic instantaneous inoculation device for casting of casting machine |
| CN110732658A (en) * | 2019-10-22 | 2020-01-31 | 东风精密铸造安徽有限公司 | in-mold casting inoculation block and inoculation method of nodular cast iron |
-
2007
- 2007-12-12 CN CNA2007101915296A patent/CN101456065A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102019376B (en) * | 2009-09-16 | 2012-09-05 | 天津新伟祥工业有限公司 | Automatic instantaneous inoculation device for casting of casting machine |
| CN101823130A (en) * | 2010-05-14 | 2010-09-08 | 贵州英吉尔机械制造有限公司 | Composite covering agent and use method thereof in production of cylinder cover casting |
| CN110732658A (en) * | 2019-10-22 | 2020-01-31 | 东风精密铸造安徽有限公司 | in-mold casting inoculation block and inoculation method of nodular cast iron |
| CN110732658B (en) * | 2019-10-22 | 2021-08-24 | 东风精密铸造有限公司 | In-mold casting inoculation block and inoculation method of nodular cast iron |
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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 |
Open date: 20090617 |