CN101418361A - Gray cast iron inoculation process - Google Patents
Gray cast iron inoculation process Download PDFInfo
- Publication number
- CN101418361A CN101418361A CNA2007101576386A CN200710157638A CN101418361A CN 101418361 A CN101418361 A CN 101418361A CN A2007101576386 A CNA2007101576386 A CN A2007101576386A CN 200710157638 A CN200710157638 A CN 200710157638A CN 101418361 A CN101418361 A CN 101418361A
- Authority
- CN
- China
- Prior art keywords
- cast iron
- iron
- technology
- inoculation
- granularity
- 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.)
- Pending
Links
Abstract
The invention relates to a graphitic cast iron inoculation technology. The technology is to add a composite inoculant of inoculated rare earth barium-calcium alloy with the granularity between 3 and 8 millimeters, silicon-calcium alloy with the granularity less than or equal to 5 millimeters and ferromanganese with the granularity less than or equal to 15 millimeters, which accounts for 0.3 to 0.5 percent of the weight of an iron liquor required to be treated, into a ladle for stokehole treatment. In order to prevent the fact that the inoculant can not enter into the iron liquor to be treated because the inoculant is wrapped by furnace slag, the composite inosulant can be held into a metal box provided with a plurality of vent holes, and the metal box is directly thrown into the ladle under the condition of stokehole treatment. The technology has the advantages that the technology adopts addition of the rare earth barium-calcium alloy, the silicon-calcium alloy and the ferromanganese into the ladle, is favorable for improving the inoculation capability of the iron liquor and strengthening the inoculation effect, can make the strength of graphitic cast iron reach more than 260 MPa, obviously thins pearlite in a substrate, reduces the segment pitch of the pearlite, improves the graphite form, makes the cast iron obtain good graphite tissue, and stably improves the strength of the graphitic cast iron.
Description
Technical field
The present invention relates to a kind of gray cast iron inoculation process, belong to the preceding inoculation technical field of iron liquid casting.
Background technology
At present, inoculation process is to improve one of most economical and valid approach of graphitic cast iron performance, and for many years, founder author has carried out great deal of experimental work to the composition and the inoculation method of nucleating agent.Up to now, according to different molten steel qualities and foundry goods type, casting quality requirement, dissimilar nucleating agent of nearly over thousands of kind and corresponding inoculation treating method have been developed both at home and abroad.Domestic investigator has carried out systematic research to the rare earth composite inoculant, and is used to produce high-carbon equivalent high-strength gray cast iron, has obtained some progress.Yet owing to reasons such as carbon equivalent high molten iron potentia concipiendi differences, the effect that improves intensity is not too remarkable.In addition, if the iron liquid after the inoculation is longer the duration of pouring, because inoculation fade, its add-on is corresponding to be increased, and has increased production cost relatively.
Summary of the invention
The object of the present invention is to provide a kind of gray cast iron inoculation process, suppress whitening to reach, strengthen graphited effect.
Above-mentioned purpose of the present invention is achieved by the following technical programs.
A kind of gray cast iron inoculation process, this technology is to be 3～8mm with breeding rare earth Ba-Ca alloy granularity, silicocalcium granularity≤5mm, the composite inoculant of ferromanganese granularity≤15mm, join in the hot metal ladle by 0.3～0.5% of required processing iron liquid weight, carry out the stokehold and handle.
In order to prevent that nucleating agent from can't be entered in the pending iron liquid by the slag parcel, can be contained in above-mentioned composite inoculant one and be with in a plurality of gas-pervious cans.When carrying out the stokehold processing, this can directly can be rendered in the hot metal ladle.
The present invention adopts the potentia concipiendi that helps to improve molten iron in the bag towards rare earth Ba-Ca alloy, silicocalcium, ferromanganese, can strengthen pregnant effect.Test-results shows, when adopting composite inoculant to handle molten iron, strength of gray cast iron is reached more than the 260MPa.In matrix, after compound inoculated technology was handled, perlite obviously obtained refinement, and a perlite pitch of fins reduces, and has improved graphite form, can make cast iron obtain good graphite structure, had stably improved strength of gray cast iron.This processing method is easy to operation, is a kind of effective technique that improves cupola furnace graphitic cast iron molten iron intensity.
Embodiment
Embodiment one: a kind of gray cast iron inoculation process, this technology is to be 3～8mm with breeding rare earth Ba-Ca alloy granularity, silicocalcium granularity≤5mm, the composite inoculant of ferromanganese granularity≤15mm, join in the hot metal ladle by 0.3～0.5% of required processing iron liquid weight, carry out the stokehold and handle.
In order to prevent that nucleating agent from can't be entered in the pending iron liquid by the slag parcel, can be contained in above-mentioned composite inoculant one and be with in a plurality of gas-pervious cans.When carrying out the stokehold processing, this can directly can be rendered in the hot metal ladle.
Claims (2)
1, a kind of gray cast iron inoculation process, this technology is to be 3～8mm with breeding rare earth Ba-Ca alloy granularity, silicocalcium granularity≤5mm, the composite inoculant of ferromanganese granularity≤15mm, join in the hot metal ladle by 0.3～0.5% of required processing iron liquid weight, carry out the stokehold and handle.
2, method according to claim 1 is characterized in that said method is contained in one with above-mentioned composite inoculant and is with in a plurality of gas-pervious cans and directly renders in the hot metal ladle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101576386A CN101418361A (en) | 2007-10-24 | 2007-10-24 | Gray cast iron inoculation process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101576386A CN101418361A (en) | 2007-10-24 | 2007-10-24 | Gray cast iron inoculation process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101418361A true CN101418361A (en) | 2009-04-29 |
Family
ID=40629361
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101576386A Pending CN101418361A (en) | 2007-10-24 | 2007-10-24 | Gray cast iron inoculation process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101418361A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102776433A (en) * | 2012-07-10 | 2012-11-14 | 常州常瑞天力动力机械有限公司 | Reinforced composite post inoculation technology for short-flow smelting |
| CN103056164A (en) * | 2013-01-04 | 2013-04-24 | 江苏钢宝轧辊有限公司 | Reinforced chilled roll and preparation method thereof |
| US8990075B2 (en) | 2007-01-12 | 2015-03-24 | Samsung Electronics Co., Ltd. | Method, apparatus, and medium for bandwidth extension encoding and decoding |
| CN105369119A (en) * | 2015-11-02 | 2016-03-02 | 河南省西峡汽车水泵股份有限公司 | Iron casting material and production technology thereof |
-
2007
- 2007-10-24 CN CNA2007101576386A patent/CN101418361A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8990075B2 (en) | 2007-01-12 | 2015-03-24 | Samsung Electronics Co., Ltd. | Method, apparatus, and medium for bandwidth extension encoding and decoding |
| CN102776433A (en) * | 2012-07-10 | 2012-11-14 | 常州常瑞天力动力机械有限公司 | Reinforced composite post inoculation technology for short-flow smelting |
| CN103056164A (en) * | 2013-01-04 | 2013-04-24 | 江苏钢宝轧辊有限公司 | Reinforced chilled roll and preparation method thereof |
| CN103056164B (en) * | 2013-01-04 | 2015-02-25 | 江苏钢宝轧辊有限公司 | Reinforced chilled roll and preparation method thereof |
| CN105369119A (en) * | 2015-11-02 | 2016-03-02 | 河南省西峡汽车水泵股份有限公司 | Iron casting material and production technology thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104120332B (en) | High-intensity high-tenacity spheroidal graphite cast-iron 600-10 and production technology thereof | |
| CN100434558C (en) | High-boron cast steel containing granular boride and preparing method thereof | |
| CN109161658A (en) | A kind of mainshaft bearing of wind-driven generator steel and its production method | |
| CN102703834A (en) | Grain-refined gear steel and production process thereof | |
| CN101525719B (en) | Nucleating agent used for producing thin-wall malleable iron component by metal mold | |
| CN105154759A (en) | Thick large-section high-silicon-molybdenum spherical graphite iron casting and manufacturing method thereof | |
| CN102031447A (en) | Boron-containing high carbon steel wire rod for manufacturing wires and production method thereof | |
| CN101289725A (en) | Process for producing gray cast iron with high carbon equivalent, low alloy and middle-high strength | |
| CN101768691B (en) | Productive technology of short flow of structure type cast iron part | |
| CN101550518A (en) | Boron-containing multi-element low alloy wear resistant cast steel and preparing method thereof | |
| CN104233048A (en) | Cast state high-strength and high-toughness ball iron alloy for steering axle and preparation method of cast state high-strength and high-toughness ball iron alloy | |
| CN103088251B (en) | A kind of spheroidal graphite cast iron and heat treating method thereof | |
| CN104087820A (en) | High-strength nodular cast iron pole and preparation technology thereof | |
| CN104060157A (en) | Hypereutectic high-chromium white cast iron and preparation method thereof | |
| CN102560252A (en) | Steel for medium-carbon Cr alloying connecting rod and manufacturing method of steel | |
| CN101418361A (en) | Gray cast iron inoculation process | |
| CN112680650A (en) | High-strength nodular cast iron and preparation method thereof | |
| CN104060020B (en) | A kind of dephosphorization method for making steel improving converter terminal molten steel Fe content | |
| CN111961954A (en) | Preparation method of as-cast mixed matrix QT500-14 nodular cast iron | |
| CN101445888B (en) | Method for producing ductile cast iron by taking iron slag taken out by molten iron when pretreating slag skimming as material | |
| CN102400032A (en) | Large-cross-section nodular cast iron | |
| CN105349873A (en) | Preparation method of spheroidal graphite cast iron | |
| CN102234734A (en) | Production process of modified alloy ball iron roller | |
| CN105296855A (en) | Steel plate capable of performing high heat input welding for ocean platform and preparation method | |
| CN103290299B (en) | Vanadium-titanium nodular cast iron smelting method |
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: 20090429 |