CN110016606A - A kind of electro-smelting method of high-strength cast iron part - Google Patents
A kind of electro-smelting method of high-strength cast iron part Download PDFInfo
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- CN110016606A CN110016606A CN201910409773.8A CN201910409773A CN110016606A CN 110016606 A CN110016606 A CN 110016606A CN 201910409773 A CN201910409773 A CN 201910409773A CN 110016606 A CN110016606 A CN 110016606A
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- China
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- raw material
- carburant
- iron liquid
- intermediate frequency
- frequency furnace
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C1/00—Refining of pig-iron; Cast iron
- C21C1/08—Manufacture of cast-iron
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/0025—Adding carbon material
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/08—Making cast-iron alloys
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a kind of electro-smelting methods of high-strength cast iron part, the raw material that the electro-smelting method of the high-strength cast iron part needs has: steel scrap, carburant and inovulant, and equipment required for the electro-smelting method of the high-strength cast iron part has intermediate frequency furnace, shot-blasting machine and gas cutting machine.The electro-smelting method of the high-strength cast iron part, addition time and Adding Way to carburant and inovulant carry out more accurate regulation, it ensure that and reach burning point and a large amount of combustion loss carburants after carburant will not be contacted with oxygen, also assure that the absorption rate of carburant is always held at higher state, guarantee iron liquid to carburant absorptivity, it can enable not molten graphite particle remaining in iron liquid that can be fully immersed into iron liquid, to eliminate the hereditation of the multiple material of addition, reduce the inclusion content of oxide in iron liquid, reduce stomata quantity, stablize chemical component, to improve the quality for being finally poured the casting produced.
Description
Technical field
The present invention relates to iron casting production technical field, specially a kind of electro-smelting method of high-strength cast iron part.
Background technique
Iron casting production is a kind of production method using method of smelting production phosphorus-containing alloy, and electro-smelting is production cast iron
During iron liquid needed for part, the method that raw material is smelted by iron liquid using intermediate frequency furnace substitution furnace cupola, the casting produced
Ironware is due to containing a certain amount of alloying element, so matrix is reinforced and refines, specially the content of matrix medium pearlite increases
Add, and the piece spacing refinement of pearlite, while improving the thermal stability of cementite, carbide can also be formed or containing alloy
Iron phosphide eutectic of element etc. hardens phase, the quality for the ironcasting produced is improved by a relatively large margin, so electric furnace smelting process gradually replaces
For furnace cupola, become the main method of production ironcasting raw material iron liquid.
With using electro-smelting constantly to produce ironcasting, find in process of production different carburant making time and
Input amount, can absorption rate, absorption rate and the proportion of goods damageds to carburant affect greatly, and inovulant amount containing Ba is not
Together, the addition time of inovulant when and pouring, nucleation ability and mechanical property to iron liquid equally have larger impact, and existing
Electro-smelting method in, careful regulation is not carried out to the use of carburant and inovulant, causes the ironcasting matter produced
Amount is difficult to control.So needing to design a kind of electro-smelting method of high-strength cast iron part regarding to the issue above.
Summary of the invention
The purpose of the present invention is to provide a kind of electro-smelting methods of high-strength cast iron part, to solve above-mentioned background technique
Middle addition time and the unsuitable problem of Adding Way for proposing carburant and inovulant.
To achieve the above object, the invention provides the following technical scheme: a kind of electro-smelting method of high-strength cast iron part,
The raw material that the electro-smelting method of the high-strength cast iron part needs has: steel scrap, carburant and inovulant, the described high intensity
Equipment required for the electro-smelting method of ironcasting has intermediate frequency furnace, shot-blasting machine and gas cutting machine.
Preferably, the electro-smelting method of the high-strength cast iron part is as follows:
(1) raw material is selected and pre-processing work
(1) the selected requirement of raw material:
Steel scrap: surface is corroded without stratification, must not be mixed with rail steel, screw-thread steel, cast iron, high-alloy steel, plastic frame and be filled out
The nonmetallic inclusions such as object, rubber filling object and soil are filled, tubular material both ends must not be closed, there must not be hollow cavity structure,
The material of noxious material must not be generated containing heating or burning；
Contained C≤0.65%, P≤0.045%, S≤0.045%, Mn≤1.3%；
Carburant: contained fixed carbon >=98%, volatile matter≤0.5%, ash content≤1%, sulphur≤0.05%, nitrogen≤
250ppm, granularity (90%)/mm are 1-3.5, moisture≤0.3%, C absorptivity > 85%；
Inovulant: the silicon titanate innoculant for being 3%-5% containing Ba is selected；
(2) raw material pre-processing: being cut into bulk for raw scrap material using gas cutting machine, and the blocky steel scrap after the completion of cutting is former
Material length and width and high numerical value are respectively less than 15cm, and tubular material diameter is cut into pipe nipple of the length less than 15cm no more than 15cm's,
Tubular material diameter is cut into after the pipe nipple less than 15cm greater than 15cm and is perpendicularly cut into 2 semi arch plates from middle part again
Structure；
In the raw scrap material block investment shot-blasting machine that cutting is completed, starting shot-blasting machine is carried out except miscellaneous operation, in shot-blasting machine
Shot diameter is less than 1cm, and shot cleans to raw scrap material block mantle friction, obtains surface non-corroding, and the melting of no attachment is former
Expect block, the taking-up of gained melting raw material block is then placed in ground, carries out brushing dedusting drying using Industrial fan；
(2) fusion process:
(1) adjusting of intermediate frequency furnace power
By in the melting raw material block investment intermediate frequency furnace after cutting removal of impurities, the initial operating power of intermediate frequency furnace is adjusted
It is the 60% of rated power, melting raw material block receives induction heat and melts, and is continuously added into melting raw material to the melting raw material being added
When reaching the 70% of the specified heating weight of intermediate frequency furnace, the operating power of intermediate frequency furnace is adjusted to the 90% of rated power
More than, melting raw material is continuously added, until when weight reaches intermediate frequency furnace specified heating weight stopping that melting raw material is added；
(2) investment of carburant
While putting into melting raw material, carburant is put into simultaneously in four times, i.e. investment melting raw material reaches Medium frequency induction
When the specified heating weight 25% of furnace, the carburant of first batch is put into, investment melting raw material reaches the specified heating of intermediate frequency furnace
When weight 50%, the carburant of second lot is put into, when investment melting raw material reaches intermediate frequency furnace specified heating weight 75%,
It puts into the carburant of third batch and puts into the 4th batch when investment melting raw material reaches intermediate frequency furnace specified heating weight 100%
Secondary carburant, the quality of every batch of carburant are put into melting raw material total amount 0.75%；
Heat melting raw material to all melt be iron liquid, carry out taking off slag operation, then control intermediate frequency furnace, to iron liquid into
Row heating and thermal insulation, heating temperature stop to 1520 DEG C, carry out quiescence in high temperature, keeping bonded hard ferrite magnet is 1520 DEG C, and the duration is
10-15min；
(3) casting and the addition of inovulant
It is slowly injected in the iron liquid injection mold cavity by quiescence in high temperature processing in mold cavity from tapping hole
When iron liquid amount reaches 25%, inovulant will slowly be injected in iron liquid mold cavity from addition from tapping hole, iron liquid is held
In continuous injection mold cavity, inovulant, which synchronizes, is persistently slowly added to iron liquid, mixes with iron liquid, until the iron liquid being added accounts for mold cavity
Internal volume 85% when, inovulant is all added and finishes, and continues to inject iron liquid, until iron liquid fills up mold cavity, completion was poured
Journey, the total amount that inovulant is added are to inject 0.45% of iron liquid total weight in mold cavity, and total duration of pouring is 60s-90s,
It washes away, stir in iron liquid flow process, iron liquid and inovulant is enabled to be sufficiently mixed carry out inoculation, promote forming core, inhibit growth,
Achieve the effect that refine crystal grain.
Compared with prior art, the beneficial effects of the present invention are: the electro-smelting method of the high-strength cast iron part, to carburetting
The addition time and Adding Way of agent and inovulant carry out more accurate regulation, after ensure that carburant will not be contacted with oxygen
Reach burning point and a large amount of combustion loss carburants, it is ensured that the absorption rate of carburant is always held at higher state, guarantees
Iron liquid inovulant is added the regulation of time and Adding Way to carburant absorptivity, can enable remaining not molten in iron liquid
Graphite particle can be fully immersed into iron liquid, with eliminate addition multiple material hereditation, reduce iron liquid in oxide
Inclusion content, reduce stomata quantity, stablize chemical component, guarantee inovulant can play one's part to the full, improve becoming pregnant for iron liquid
Ability is educated, to improve the quality for being finally poured the casting produced.
Specific embodiment
The technical scheme in the embodiments of the invention will be clearly and completely described below, it is clear that described implementation
Example is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is common
Technical staff's every other embodiment obtained without making creative work belongs to the model that the present invention protects
It encloses.
The present invention provides a kind of technical solution:
A kind of electro-smelting method of high-strength cast iron part, the raw material that the electro-smelting method of the high-strength cast iron part needs
Have: steel scrap, carburant and inovulant, equipment required for the electro-smelting method of the high-strength cast iron part have intermediate frequency furnace,
Shot-blasting machine and gas cutting machine.
A kind of electro-smelting method of high-strength cast iron part is as follows:
(1) raw material is selected and pre-processing work
(1) the selected requirement of raw material:
Steel scrap: surface is corroded without stratification, must not be mixed with rail steel, screw-thread steel, cast iron, high-alloy steel, plastic frame and be filled out
The nonmetallic inclusions such as object, rubber filling object and soil are filled, tubular material both ends must not be closed, there must not be hollow cavity structure,
The material of noxious material must not be generated containing heating or burning；
Contained C≤0.65%, P≤0.045%, S≤0.045%, Mn≤1.3%；
Carburant: contained fixed carbon >=98%, volatile matter≤0.5%, ash content≤1%, sulphur≤0.05%, nitrogen≤
250ppm, granularity (90%)/mm are 1-3.5, moisture≤0.3%, C absorptivity > 85%；
Inovulant: the silicon titanate innoculant for being 3%-5% containing Ba is selected；
(2) raw material pre-processing: being cut into bulk for raw scrap material using gas cutting machine, and the blocky steel scrap after the completion of cutting is former
Material length and width and high numerical value are respectively less than 15cm, and tubular material diameter is cut into pipe nipple of the length less than 15cm no more than 15cm's,
Tubular material diameter is cut into after the pipe nipple less than 15cm greater than 15cm and is perpendicularly cut into 2 semi arch plates from middle part again
Structure；
In the raw scrap material block investment shot-blasting machine that cutting is completed, starting shot-blasting machine is carried out except miscellaneous operation, in shot-blasting machine
Shot diameter is less than 1cm, and shot cleans to raw scrap material block mantle friction, obtains surface non-corroding, and the melting of no attachment is former
Expect block, the taking-up of gained melting raw material block is then placed in ground, carries out brushing dedusting drying using Industrial fan；
(2) fusion process:
(1) adjusting of intermediate frequency furnace power
By in the melting raw material block investment intermediate frequency furnace after cutting removal of impurities, the initial operating power of intermediate frequency furnace is adjusted
It is the 60% of rated power, melting raw material block receives induction heat and melts, and is continuously added into melting raw material to the melting raw material being added
When reaching the 70% of the specified heating weight of intermediate frequency furnace, the operating power of intermediate frequency furnace is adjusted to the 90% of rated power
More than, melting raw material is continuously added, until when weight reaches intermediate frequency furnace specified heating weight stopping that melting raw material is added；
(2) investment of carburant
While putting into melting raw material, carburant is put into simultaneously in four times, i.e. investment melting raw material reaches Medium frequency induction
When the specified heating weight 25% of furnace, the carburant of first batch is put into, investment melting raw material reaches the specified heating of intermediate frequency furnace
When weight 50%, the carburant of second lot is put into, when investment melting raw material reaches intermediate frequency furnace specified heating weight 75%,
It puts into the carburant of third batch and puts into the 4th batch when investment melting raw material reaches intermediate frequency furnace specified heating weight 100%
Secondary carburant, the quality of every batch of carburant are put into melting raw material total amount 0.75%；
Heat melting raw material to all melt be iron liquid, carry out taking off slag operation, then control intermediate frequency furnace, to iron liquid into
Row heating and thermal insulation, heating temperature stop to 1520 DEG C, carry out quiescence in high temperature, keeping bonded hard ferrite magnet is 1520 DEG C, and the duration is
10-15min；
(3) casting and the addition of inovulant
It is slowly injected in the iron liquid injection mold cavity by quiescence in high temperature processing in mold cavity from tapping hole
When iron liquid amount reaches 25%, inovulant will slowly be injected in iron liquid mold cavity from addition from tapping hole, iron liquid is held
In continuous injection mold cavity, inovulant, which synchronizes, is persistently slowly added to iron liquid, mixes with iron liquid, until the iron liquid being added accounts for mold cavity
Internal volume 85% when, inovulant is all added and finishes, and continues to inject iron liquid, until iron liquid fills up mold cavity, completion was poured
Journey, the total amount that inovulant is added are to inject 0.45% of iron liquid total weight in mold cavity, and total duration of pouring is 60s-90s,
It washes away, stir in iron liquid flow process, iron liquid and inovulant is enabled to be sufficiently mixed carry out inoculation, promote forming core, inhibit growth,
Achieve the effect that refine crystal grain.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (2)
1. a kind of electro-smelting method of high-strength cast iron part, it is characterised in that: the electro-smelting of the high-strength cast iron part
The raw material that method needs has: steel scrap, carburant and inovulant, required for the electro-smelting method of the high-strength cast iron part
Equipment has intermediate frequency furnace, shot-blasting machine and gas cutting machine.
2. a kind of electro-smelting method of high-strength cast iron part according to claim 1, it is characterised in that: the high intensity
The electro-smelting method of ironcasting is as follows:
(1) raw material is selected and pre-processing work
(1) the selected requirement of raw material:
Steel scrap: surface without stratification corrode, must not be mixed with rail steel, screw-thread steel, cast iron, high-alloy steel, plastic frame and filler,
The nonmetallic inclusions such as rubber filling object and soil, tubular material both ends must not be closed, and must not have hollow cavity structure, must not contain
There are heating or burning to generate the material of noxious material, the material of noxious material must not be generated containing heating or burning；
And contained C≤0.65%, P≤0.045%, S≤0.045%, Mn≤1.3%；
Carburant: contained fixed carbon >=98%, volatile matter≤0.5%, ash content≤1%, sulphur≤0.05%, nitrogen≤250ppm, grain
Degree (90%)/mm is 1-3.5, moisture≤0.3%, C absorptivity > 85%；
Inovulant: the silicon titanate innoculant for being 3%-5% containing Ba is selected；
(2) raw material pre-processing: being cut into bulk for raw scrap material using gas cutting machine, the blocky raw scrap material after the completion of cutting
Length and width and high numerical value are respectively less than 15cm, the pipe nipple that is cut into length is less than 15cm of the tubular material diameter no more than 15cm, pipe
Shape material diameter is cut into after the pipe nipple less than 15cm greater than 15cm and is perpendicularly cut into 2 semi arch plate knots from middle part again
Structure；
In the raw scrap material block investment shot-blasting machine that cutting is completed, starting shot-blasting machine carries out removing miscellaneous operation, the shot in shot-blasting machine
Diameter is less than 1cm, and shot cleans to raw scrap material block mantle friction, obtains surface non-corroding, the melting raw material block of no attachment,
Then the taking-up of gained melting raw material block is placed in ground, carries out brushing dedusting drying using Industrial fan；
(2) fusion process:
(1) adjusting of intermediate frequency furnace power
By in the melting raw material block investment intermediate frequency furnace after cutting removal of impurities, the initial operating power of intermediate frequency furnace is adjusted to volume
Determine the 60% of power, melting raw material block receives induction heat and melts, and is continuously added into melting raw material to the melting raw material being added and reaches
The specified heating weight of intermediate frequency furnace 70% when, by the operating power of intermediate frequency furnace be adjusted to the 90% of rated power with
On, melting raw material is continuously added, until when weight reaches intermediate frequency furnace specified heating weight stopping that melting raw material is added；
(2) investment of carburant
While putting into melting raw material, carburant is put into simultaneously in four times, i.e. investment melting raw material reaches intermediate frequency furnace volume
When heating weight 25% surely, the carburant of first batch is put into, investment melting raw material reaches the specified heating weight of intermediate frequency furnace
When 50%, the carburant of second lot is put into, when investment melting raw material reaches intermediate frequency furnace specified heating weight 75%, investment
The carburant of third batch, when investment melting raw material reaches intermediate frequency furnace specified heating weight 100%, the 4th batch of investment
Carburant, the quality of every batch of carburant are put into melting raw material total amount 0.75%；
It is iron liquid that melting raw material, which is heated, to all melting, and carries out taking off slag operation, then controls intermediate frequency furnace, add to iron liquid
Heat heat preservation, heating temperature to 1520 DEG C of stoppings, carrying out quiescence in high temperature, and keeping bonded hard ferrite magnet is 1520 DEG C, duration 10-
15min；
(3) casting and the addition of inovulant
Iron liquid is slowly injected in mold cavity by the iron liquid injection mold cavity by quiescence in high temperature processing from tapping hole
When amount reaches 25%, inovulant will slowly be injected in iron liquid mold cavity from addition from tapping hole, iron liquid is persistently infused
Enter in mold cavity, inovulant, which synchronizes, is persistently slowly added to iron liquid, mixes with iron liquid, until the iron liquid being added accounts for mold cavity content
When long-pending 85%, inovulant is all added and finishes, and continues to inject iron liquid, until iron liquid fills up mold cavity, completes casting process, adds
The total amount for entering inovulant is to inject 0.45% of iron liquid total weight in mold cavity, and total duration of pouring is 60s-90s, iron liquid stream
It washes away, stir during dynamic, iron liquid and inovulant is enabled to be sufficiently mixed carry out inoculation, promoting forming core, inhibit growth, reach thin
Change the effect of crystal grain.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910409773.8A CN110016606B (en) | 2019-05-17 | 2019-05-17 | Electric furnace smelting method for high-strength iron castings |
Applications Claiming Priority (1)
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|---|---|---|---|
| CN201910409773.8A CN110016606B (en) | 2019-05-17 | 2019-05-17 | Electric furnace smelting method for high-strength iron castings |
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| CN110016606A true CN110016606A (en) | 2019-07-16 |
| CN110016606B CN110016606B (en) | 2022-01-25 |
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| CN104894466A (en) * | 2015-06-03 | 2015-09-09 | 郑州机械研究所 | High-strength, high-elasticity modulus and low-stress gray cast iron and manufacturing method thereof |
| CN105401066A (en) * | 2015-11-26 | 2016-03-16 | 成都九十度工业产品设计有限公司 | Low-tin-silicon-molybdenum vermicular graphite cast iron and preparation method thereof |
| CN106282759A (en) * | 2016-09-26 | 2017-01-04 | 贵州开磷集团股份有限公司 | A kind of low chromium alloy iron casting and preparation method thereof |
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2019
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2939542B1 (en) * | 1998-03-02 | 1999-08-25 | 工業技術院長 | Hypoeutectoid steel with dispersed fine graphite structure and method for producing the same |
| US20030075843A1 (en) * | 2001-08-29 | 2003-04-24 | Empco (Canada) Ltd. | Multi-purpose, multi-oxy-fuel, power burner/injector/oxygen lance device |
| CN101157091A (en) * | 2007-11-22 | 2008-04-09 | 郴州市伊斯达实业有限公司 | Method for disintegrating relayable rails |
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| CN103993221A (en) * | 2014-05-26 | 2014-08-20 | 四川省富邦钒钛制动鼓有限公司 | Vanadium titanium cast iron brake drum and preparation method thereof |
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| CN106282759A (en) * | 2016-09-26 | 2017-01-04 | 贵州开磷集团股份有限公司 | A kind of low chromium alloy iron casting and preparation method thereof |
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| Publication number | Publication date |
|---|---|
| CN110016606B (en) | 2022-01-25 |
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