CN110093472A - A kind of gray cast iron production method for high-intensitive valve body - Google Patents
A kind of gray cast iron production method for high-intensitive valve body Download PDFInfo
- Publication number
- CN110093472A CN110093472A CN201910286547.5A CN201910286547A CN110093472A CN 110093472 A CN110093472 A CN 110093472A CN 201910286547 A CN201910286547 A CN 201910286547A CN 110093472 A CN110093472 A CN 110093472A
- Authority
- CN
- China
- Prior art keywords
- cast iron
- gray cast
- production method
- iron
- added
- 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
Classifications
-
- 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
- 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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The invention discloses a kind of production methods of gray cast iron production method for high-intensitive valve body, in configuration process, added raw material are as follows: gray cast iron chip, steel scrap, flux, deslagging agent, inovulant, the weight ratio of raw material described above are 80-95:8-15:1-4:0.2-0.6:0.1-0.3；It is the following steps are included: raw material preparation process, charging process, melting process, smelting procedure, breed process.The beneficial effects of the present invention are: producing high-strength gray iron using electric furnace circulation, 95% or more product qualification rate reaching, gray cast iron chip recycling rate will be up to 97% using discarded gray cast iron chip as raw material；So that resource is reused, not only improve environmental protection, and takes full advantage of resource, reduces manufacturing cost.
Description
Technical field
The present invention relates to valve body casting technology field, specially a kind of gray cast iron production method for high-intensitive valve body.
Background technique
The smelting equipment of gray cast iron is divided into furnace cupola and electric furnace at present, and electric furnace is mainly electric induction furnace, including main frequency furnace, in
Frequency furnace, frequency conversion furnace.
Gray cast iron chip generally can not be as the metal charge of furnace cupola, the reason is that gray cast iron chip is in cupola melting ring
It is easily aoxidized under border, charging is difficult, and tiny chip falls into low-temperature region in furnace along coke gap.The molten metal chemistry of institute's melting at
Split pole is unstable, and the rate of recovery is low, and oxygen concentration in liquid iron is high, casting chilling tendency is big, stomata is more, iron liquid poor fluidity when being poured.
When medium-frequency induction furnace melting gray cast iron, no exhaust emission is good for the environment, thermoregulation is good, iron liquid is clean,
Degree of supercooling is high, can give full play to the effect bred, and iron liquid is strong to stir up and down under electromagnetic action, and it is equal to facilitate ingredient, temperature
It is even, it is also beneficial to deoxidation degasification.Using night electricity paddy electricity, cost is reduced, gray cast iron chip is carried out with medium-frequency induction furnace
When melting, main problem is that chip is not easy to fall, and is damaged to furnace lining big.
Summary of the invention
ThisInventionThe technical issues of solution, is to overcome defect of the existing technology, provide a kind of for high-intensitive valve body
Gray cast iron production method, so that resource is reused, not only improve environmental protection, but take full advantage of resource, reduce manufacture at
This.
To achieve the above object, the invention provides the following technical scheme:
A kind of production method of high-strength gray cast iron, in configuration process, added raw material are as follows: gray cast iron chip, is melted steel scrap
Agent, deslagging agent, inovulant, the weight ratio of raw material described above are 80-95:8-15:1-4:0.2-0.6:0.1-0.3, high-quality height
The production method of strength gray cast iron, comprising the following steps: raw material preparation process, charging process, melting process, smelting procedure, pregnant
Educate process.
Gray cast iron chip used in raw material decides whether to carry out pretreatment process, the pre- place according to its clean level
Science and engineering sequence is to use the dust or sand grains inhaling, blow, in screen method removing chip, it is therefore an objective to which slag amount when reducing melting improves molten
Change speed.
Preferably, in charging process, 9% gray cast iron liquid of reserved furnace volume, is first added steel scrap when every furnace molten iron discharging,
Gray cast iron chip is successively added again until filling it up with electric furnace, every layer of gray cast iron depth of cut is 10 centimetres, and in every layer of chip
Glass powder is added, ash poking case-iron shavings and glass powder is stirred, drop to gray cast iron chip and glass powder in iron liquid
Preferably, the flux is the mixture or glass powder of soda ash and lime, and the proportion of the soda ash and lime is 1:3.
Preferably, in melting process, the output power for adjusting medium-frequency induction furnace is the 97% of rated power.
Preferably, smelting procedure after waiting raw materials to liquefy completely, is added deslagging agent covering, is warming up to 1460 DEG C, be added all kinds of
With the alloy got ready, chemical analysis is adjusted to various trade mark necessary requirements, when being warming up to 1500 DEG C, molten iron is come out of the stove.
Compared with prior art, the beneficial effects of the present invention are: being followed using discarded gray cast iron chip as raw material using electric furnace
Ring produces high-strength gray iron, and 95% or more product qualification rate reaching, gray cast iron chip recycling rate will be up to 97%；Resource is set to repeat benefit
With, not only improve environmental protection, and take full advantage of resource, reduce manufacturing cost.
Specific embodiment
Below in conjunction in the embodiment of the present invention, technical solution in the embodiment of the present invention is clearly and completely retouched
It states, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based on the present invention
In embodiment, every other implementation obtained by those of ordinary skill in the art without making creative efforts
Example, shall fall within the protection scope of the present invention.
The present invention provides a kind of technical solution: a kind of production method of high-strength gray cast iron is added in configuration process
Raw material are as follows: gray cast iron chip, steel scrap, flux, deslagging agent, inovulant, the weight ratio of raw material described above are 80-95:8-15:
1-4:0.2-0.6:0.1-0.3, the production method of high-quality high-strength gray cast iron, comprising the following steps: raw material preparation process, charging
Process, smelting procedure, breeds process at melting process.
In order to cast the gray cast iron of varying strength, present invention employs following three kinds different embodiments to be illustrated:
Embodiment one:
The production of HT250 gray cast iron:
A) raw material is prepared: added raw material are as follows: gray cast iron chip, steel scrap, flux, deslagging agent: inovulant, manganese iron, weight ratio
For 91:8.4:1:0.3:0.1:0.6.
B) charging process: reserving 8% gray cast iron liquid of furnace volume when every furnace molten iron discharging, steel scrap is first added, then ash is cast
Iron chip is successively added until filling it up with electric furnace, and every layer of gray cast iron depth of cut is 8~10 centimetres, and adds glass in every layer of chip
Glass powder stirs ash poking case-iron shavings and flux as flux, drop to gray cast iron chip and flux in iron liquid, to increase gray cast iron
The chip degree of packing improves burn-off rate.
C) melting process: the output power for adjusting medium-frequency induction furnace is the 90% of rated power.
D) smelting procedure: waiting after raw material liquefies completely in medium-frequency induction furnaces, and the perlite that granularity is 30~50 mesh is added
It is covered, is warming up to 1450~1480 DEG C, manganese iron is added, when being warming up to 1480~1520 DEG C, molten iron is come out of the stove.
E) it breeds process: inovulant ferrosilicon being added in plug for outlet, as iron liquid flows slowly into casting ladle.
Embodiment one is detected according to GB9439-88 standard, various technical indicators are as follows: tensile strength 257~
289Mpa, hardness HB180~220.
Embodiment two:
The production of HT300 gray cast iron:
A) raw material is prepared: added raw material are as follows: gray cast iron chip, steel scrap, flux, deslagging agent: inovulant, manganese iron, weight ratio
For 87:12.2:0.8:0.3:0.2:0.8.
B) charging process: reserving 9% gray cast iron liquid of furnace volume when every furnace molten iron discharging, steel scrap is first added, then ash is cast
Iron chip is successively added until filling it up with electric furnace, and every layer of gray cast iron depth of cut is 10-15 centimetres, and is added in every layer of chip
The mixture of soda ash and lime stirs ash poking case-iron shavings and flux as flux, and gray cast iron chip and flux is made to drop to iron liquid
In, to increase the gray cast iron chip degree of packing, improve burn-off rate.
C) melting process: the output power for adjusting medium-frequency induction furnace is the 95% of rated power.
D) smelting procedure: waiting after raw material liquefies completely in medium-frequency induction furnaces, and the perlite that granularity is 30~50 mesh is added
It is covered, is warming up to 1470 DEG C, manganese iron is added, when being warming up to 149, molten iron is come out of the stove.
E) it breeds process: inovulant silicon barium being added in plug for outlet, as iron liquid flows slowly into casting ladle.
F) the gray cast iron chip used in raw material decides whether to carry out pretreatment process according to its clean level: described is pre-
Treatment process is to use the dust or sand grains inhaling, blow, in screen method removing chip, it is therefore an objective to which slag amount when reducing melting improves
Burn-off rate.
Embodiment two is detected according to GB9439-88 standard, various technical indicators are as follows: tensile strength 305~
341MPa, hardness HB200~230.
Embodiment three:
The production of HT350 gray cast iron:
A) raw material is prepared: added raw material are as follows: gray cast iron chip, steel scrap, flux, deslagging agent, manganese iron: inovulant, its weight ratio
For 84:15.2:4:0.3:0.3:0.8.
B) charging process: reserving 9% gray cast iron liquid of furnace volume when every furnace molten iron discharging, steel scrap is first added, then ash is cast
Iron chip is successively added until filling it up with electric furnace, and every layer of gray cast iron depth of cut is 25 centimetres, and adds soda ash in every layer of chip
Mixture with lime stirs ash poking case-iron shavings and flux, drop to gray cast iron chip and flux in iron liquid as flux, with
Increase the gray cast iron chip degree of packing, improves burn-off rate.
C) melting process: the output power for adjusting medium-frequency induction furnace is the 100% of rated power.
D) smelting procedure: waiting after raw material liquefies completely in medium-frequency induction furnaces, and the perlite that granularity is 45 mesh is added and carries out
Covering is warming up to 1475 DEG C, manganese iron is added, when being warming up to 1520 DEG C, molten iron is come out of the stove.
E) it breeds process: inovulant silicomanganese and silicon barium being added in plug for outlet, as iron liquid flows slowly into casting ladle.
Embodiment three is detected according to GB9439-88 standard, various technical indicators are as follows: tensile strength 354~
389MPa, hardness HB210~250.
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 (7)
1. a kind of gray cast iron production method for high-intensitive valve body, which is characterized in that in configuration process, added raw material
Are as follows: the weight ratio of gray cast iron chip, steel scrap, flux, deslagging agent, inovulant, raw material described above is 80-95:8-15:1-4:
0.2-0.6:0.1-0.3, the production method of high-quality high-strength gray cast iron, comprising the following steps: raw material preparation process, charging work
Sequence, smelting procedure, breeds process at melting process;The pretreatment process is to use inhale, blow, in screen method removing chip
Dust or sand grains;In charging process, the gray cast iron liquid of the 8-10% of reserved furnace volume when every furnace molten iron discharging is first added useless
Steel, then gray cast iron chip is successively added until filling it up with electric furnace, every layer of gray cast iron depth of cut is 8~25 centimetres, and at every layer
Glass powder is added in chip, stirs ash poking case-iron shavings and glass powder, drop to gray cast iron chip and glass powder in iron liquid.
2. a kind of gray cast iron production method for high-intensitive valve body according to claim 1, it is characterised in that: described
Flux is the mixture or glass powder of soda ash and lime, and the proportion of the soda ash and lime is 1:3.
3. a kind of gray cast iron production method for high-intensitive valve body according to claim 1, it is characterised in that: melting
In process, the output power for adjusting medium-frequency induction furnace is 90% or more of rated power.
4. a kind of gray cast iron production method for high-intensitive valve body according to claim 1, it is characterised in that: smelter
Sequence after waiting raw materials to liquefy completely, is added deslagging agent covering, is warming up to 1450~1480 DEG C, is added all kinds of with the alloy got ready, tune
Whole chemical analysis is to various trade mark necessary requirements, and when being warming up to 1480~1520 DEG C, molten iron is come out of the stove.
5. a kind of gray cast iron production method for high-intensitive valve body according to claim 1, it is characterised in that: described
Deslagging agent is the perlite of 30~50 mesh of granularity.
6. a kind of gray cast iron production method for high-intensitive valve body according to claim 1, it is characterised in that: breed work
Sequence: determining that innoculant adding quantity, inovulant can be disposably put into casting ladle according to the different situations of molten iron, can also be by inovulant
It is added in plug for outlet, as iron liquid flows slowly into casting ladle.
7. a kind of production method of high-strength gray cast iron according to claim 1, it is characterised in that: the inovulant is silicon
Iron or Si-Ba alloy or silicomangan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910286547.5A CN110093472A (en) | 2019-04-10 | 2019-04-10 | A kind of gray cast iron production method for high-intensitive valve body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910286547.5A CN110093472A (en) | 2019-04-10 | 2019-04-10 | A kind of gray cast iron production method for high-intensitive valve body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110093472A true CN110093472A (en) | 2019-08-06 |
Family
ID=67444655
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910286547.5A Pending CN110093472A (en) | 2019-04-10 | 2019-04-10 | A kind of gray cast iron production method for high-intensitive valve body |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110093472A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114703419A (en) * | 2022-03-31 | 2022-07-05 | 瑞安博宇科技股份有限公司 | Production method of galvanized cast iron for commutator production |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101255525A (en) * | 2007-12-22 | 2008-09-03 | 繁昌县金贸铸造有限责任公司 | Method for producing high-strength gray cast iron |
-
2019
- 2019-04-10 CN CN201910286547.5A patent/CN110093472A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101255525A (en) * | 2007-12-22 | 2008-09-03 | 繁昌县金贸铸造有限责任公司 | Method for producing high-strength gray cast iron |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114703419A (en) * | 2022-03-31 | 2022-07-05 | 瑞安博宇科技股份有限公司 | Production method of galvanized cast iron for commutator production |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101255524B (en) | Method for producing nodular graphite cast iron | |
| CN106811676A (en) | A kind of high-intensity high-tenacity as cast condition QT700 10 and its production method | |
| CN105018669B (en) | Production method of industrial pure iron for nuclear power | |
| CN106045301A (en) | Method for producing mineral wool by using early-stage molten-state steel slag of converter | |
| CN102094147A (en) | Control method for producing low temperature spheroidal graphite cast iron | |
| CN109136458B (en) | Quick-acting converter repairing method for converter | |
| CN100562591C (en) | Technology with smelting ferroferrite with sponge iron | |
| CN100535155C (en) | Method for producing high-strength gray cast iron | |
| CN103981388A (en) | Tin bronze smelting slagging constituent and application method thereof | |
| CN101591720B (en) | Method for producing aluminum-manganese-iron alloy | |
| CN103643056B (en) | The smelting process of low carbon ferromanganese | |
| CN101775464B (en) | Micro carbon micro phosphorus aluminum manganese iron alloy as well as production method thereof | |
| CN103233094B (en) | Smelting process of high-strength alloy steel | |
| CN103643094B (en) | The smelting process of high carbon ferromanganese | |
| CN110093472A (en) | A kind of gray cast iron production method for high-intensitive valve body | |
| CN102559996A (en) | New silicon-aluminum-barium-calcium multicomponent deoxidation alloy for steelmaking and preparation technology thereof | |
| CN106319129A (en) | Short-process manufacturing method for producing casting for wind power generation equipment | |
| CN118186183A (en) | Calcium aluminate synthetic slag, preparation method thereof and smelting method of high-carbon steel by using calcium aluminate synthetic slag | |
| CN106811677A (en) | A kind of piston ring carrier cast iron materials and its manufacture method | |
| CN109865804A (en) | A kind of bismuth tellurium alloy method of ball pen head free cutting stainless steel | |
| CN115572783A (en) | Barium-containing composite nodulizer and preparation method thereof | |
| CN104593543A (en) | Steelmaking method | |
| CN103243195A (en) | Smelting process of steel ingot for wind power generating motor shaft with high performance | |
| CN102453832A (en) | Preparation method of cast iron | |
| CN101363096A (en) | Smelting technology with slag of silicon-manganese and nickel iron alloys by ore furnace |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190806 |
|
| RJ01 | Rejection of invention patent application after publication |