CN109280844A - A kind of high nodulizing rate vermicular cast iron preparation process of high pearlite - Google Patents
A kind of high nodulizing rate vermicular cast iron preparation process of high pearlite Download PDFInfo
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- CN109280844A CN109280844A CN201811171408.XA CN201811171408A CN109280844A CN 109280844 A CN109280844 A CN 109280844A CN 201811171408 A CN201811171408 A CN 201811171408A CN 109280844 A CN109280844 A CN 109280844A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/10—Cast-iron alloys containing aluminium or silicon
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- 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
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- 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
- C22C33/10—Making cast-iron alloys including procedures for adding magnesium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/06—Cast-iron alloys containing chromium
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- 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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- Materials Engineering (AREA)
- Metallurgy (AREA)
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- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The present invention provides a kind of high nodulizing rate vermicular cast iron preparation process of high pearlite, is related to vermicular cast iron processing technique field.The high nodulizing rate vermicular cast iron preparation process of high pearlite includes that the heat of mixing melts, detects adjusting, charging melting, compactedization breed, are poured and breed, cool down heat preservation, peeling.The present invention overcomes the deficiencies in the prior art, optimize the compactedization degree of vermicular cast iron, improve the pearly-lustre degree of product, and product is made to have many advantages, such as that resistance to compression, wear-resisting, good toughness, stability are high.
Description
Technical field
The present invention relates to vermicular cast iron processing technique fields, and in particular to a kind of high high nodulizing rate vermicular cast iron system of pearlite
Standby technique.
Background technique
Vermicular cast iron be a kind of graphite form between sheet and it is spherical between a kind of new engineering material, conventional mechanics
Performance, wearability and thermal fatigue property are more much better than gray cast iron, and thermal conductivity, damping property are again more excellent than spheroidal graphite cast-iron.Therefore, the material
Expect the good thermal conductivity of existing gray cast iron, damping property, and have the good wearability of spheroidal graphite cast-iron and high intensity, can widely use
In manufacture diesel engine body, cylinder cap, cylinder sleeve, brake block, brake drum, intake and exhaust manifold and ingot mould, glass mold etc..
As transportation development demand and engineering truck upgrade, market is to high security, high intensity, the demand of long-life brake drum
It is increasingly urgent to.Automobile brake drum uses under heat fatigue and abrasive conditions, it is therefore desirable to which brake drum material is with good heat-resisting
Fatigue behaviour and wear-resisting property, automobile brake drum generally use high-strength gray cast iron production, and material developing direction is high thermal conductivity
Property and high intensity, it is general to improve thermal conductivity by improving phosphorus content and improving graphite form, by be added alloying element improve it is strong
Degree, the plain cast iron brake drum material trade mark are HT250, phosphorus content 3.2-3.5%, 0.3-0.6% copper are added, at chromium alloying
Reason, it is desirable that based on A type graphite, intensity is greater than 250MPa.The brake drum made of vermicular cast iron had both maintained the advantages of gray cast iron,
The service performance of brake drum can be improved in the deficiency for compensating for gray cast iron again, increases the stationarity and reliability of brake drum, mitigates casting
The self weight of part is better able to meet requirement of the current auto manufacturing to parts such as brake drums.Currently, being deposited in vermicular cast iron production
Bound, compactedization that can not determine vermiculizer additional amount it is unstable, can not determine suitable content of pearlite in alloy and obtain corresponding
The problems such as pearlite of content, limits the application of vermicular cast iron.
Summary of the invention
In view of the shortcomings of the prior art, the present invention provides a kind of high nodulizing rate vermicular cast iron preparation process of high pearlite, optimization
The compactedization degree of vermicular cast iron, improves the pearly-lustre degree of product, and product is made to have resistance to compression, wear-resisting, good toughness, stability height etc.
Advantage.
In order to achieve the above object, technical solution of the present invention is achieved by the following technical programs:
A kind of high nodulizing rate vermicular cast iron preparation process of high pearlite, the high high nodulizing rate vermicular cast iron preparation process of pearlite
The following steps are included:
(1) by the pig iron, ferrosilicon, high-carbon-chromium bearing steel, foundry returns be added smelting furnace in, first high temperature melt, after adjust the temperature to
1530-1580 DEG C, heat preservation continues melting 10-15min, rear to clean, and it is spare to obtain molten iron；
(2) sampling of above-mentioned molten iron is detected into its component content using infrared spectroscopy, quantitatively adds manganese iron, carburetting according to testing result
Agent, molybdenum-iron and ferrochrome, adjust the temperature to 1530-1580 DEG C, and it is spare to obtain base iron by quiescence in high temperature 5-10min；
(3) vermiculizer, inovulant A and deslagging agent are added in the dykes and dams packet preheated in advance, pour base iron, and by asbestos to it
It is covered, carries out heat preservation creepage rate；
(4) the good base iron of above-mentioned compactedization is adjusted the temperature to 1400-1430 DEG C, after base iron is cast in sandbox, simultaneously
Inovulant B is added and carries out casting machine current-following inoculation；
(5) material in above-mentioned sandbox is cooled to 600-650 DEG C, after keeping the temperature a period of time, room temperature cooling to room temperature takes out casting
Part carries out sand removal processing in sand roller, obtains the high high nodulizing rate vermicular cast iron of pearlite of the present invention.
Preferably, the percentage composition of the material composition of the high nodulizing rate vermicular cast iron of the high pearlite are as follows: the pig iron 50%,
Ferrosilicon 7%, high-carbon-chromium bearing steel 11%, foundry returns 32%.
Preferably, the percentage of the base iron chemical composition content are as follows: C:3.45%-3.60%, S:0.02%-0.03%,
More than Si:1.45%-1.65%, P:0.02%-0.03%, Mn:0.35%-0.45%, Gr:0.08%-0.12%, Mo:0.08%-0.10%
Amount is Fe.
Preferably, the vermiculizer is silicon-calcium-magnesium rare earth.
Preferably, the inovulant A is silicon titanate innoculant, and inovulant B is silicon iron inoculator.
Preferably, the additive amount of the vermiculizer is the 0.3%-0.4% of base iron quality, and the additive amount of inovulant A is original
The additive amount of the 0.12%-0.18% of molten steel quality, inovulant B are the 0.10%-0.14% of base iron quality.
Preferably, the temperature that the dykes and dams packet preheats in advance is 900 DEG C.
Preferably, after the material in the sandbox is cooled to 600-650 DEG C, the time of heat preservation is 20-30min.
The present invention provides a kind of high nodulizing rate vermicular cast iron preparation process of high pearlite, and advantage exists compared with prior art
In:
(1) present invention is properly added the metal materials such as chromium, molybdenum in vermicular cast iron raw material, effectively prevent Ovshinsky during eutectic
Carbon in body is diffused, and promotes the stability of pearlite, increases that product is wear-resisting and anti-fatigue performance.
(2) present invention optimization vermiculizer and inovulant additive amount, and to molten iron using inovulant A and inovulant B into
Row late inoculation effectively promotes the nodulizing rate of product, the comprehensive quality for promoting product.
(3) present invention continues to cool down, holding stage energy while cooling using being first cooled to 600-650 DEG C after being kept the temperature
The production quantity of pearlite is promoted, and promotes the stability of product, reduces internal stress.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below with reference to the embodiment of the present invention pair
Technical solution in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is a part of the invention
Embodiment, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making wound
Every other embodiment obtained under the premise of the property made labour, shall fall within the protection scope of the present invention.
Embodiment 1:
A kind of high nodulizing rate vermicular cast iron preparation process of high pearlite, the high high nodulizing rate vermicular cast iron preparation process of pearlite
The following steps are included:
(1) by the pig iron, ferrosilicon, high-carbon-chromium bearing steel, foundry returns be added smelting furnace in, first high temperature melt, after adjust the temperature to
1530-1580 DEG C, heat preservation continues melting 10-15min, rear to clean, and it is spare to obtain molten iron；
(2) sampling of above-mentioned molten iron is detected into its component content using infrared spectroscopy, quantitatively adds manganese iron, carburetting according to testing result
Agent, molybdenum-iron and ferrochrome, adjust the temperature to 1530-1580 DEG C, and it is spare to obtain base iron by quiescence in high temperature 5-10min；
(3) vermiculizer, inovulant A and deslagging agent are added in the dykes and dams packet preheated in advance, pour base iron, and by asbestos to it
It is covered, carries out heat preservation creepage rate；
(4) the good base iron of above-mentioned compactedization is adjusted the temperature to 1400-1430 DEG C, after base iron is cast in sandbox, simultaneously
Inovulant B is added and carries out casting machine current-following inoculation；
(5) material in above-mentioned sandbox is cooled to 600-650 DEG C, after keeping the temperature a period of time, room temperature cooling to room temperature takes out casting
Part carries out sand removal processing in sand roller, obtains the high high nodulizing rate vermicular cast iron of pearlite of the present invention.
The percentage composition of the material composition of the high nodulizing rate vermicular cast iron of high pearlite are as follows: the pig iron 50%, ferrosilicon 7%,
High-carbon-chromium bearing steel 11%, foundry returns 32%；The percentage of the base iron chemical composition content are as follows: C:3.45%, S:0.02%,
Si:1.45%%, P:0.02%, Mn:0.35%, Gr:0.08%, Mo:0.08% surplus are Fe；The vermiculizer is silicon-calcium-magnesium rare earth；
The inovulant A is silicon titanate innoculant, and inovulant B is silicon iron inoculator；The additive amount of the vermiculizer is base iron quality
The additive amount of 0.3%, inovulant A are the 0.12% of base iron quality, and the additive amount of inovulant B is the 0.10% of base iron quality；Institute
Stating the temperature that dykes and dams packet preheats in advance is 900 DEG C；After material in the sandbox is cooled to 600-650 DEG C, the time of heat preservation is
20-30min。
Embodiment 2:
A kind of high nodulizing rate vermicular cast iron preparation process of high pearlite, the high high nodulizing rate vermicular cast iron preparation process of pearlite
The following steps are included:
(1) by the pig iron, ferrosilicon, high-carbon-chromium bearing steel, foundry returns be added smelting furnace in, first high temperature melt, after adjust the temperature to
1530-1580 DEG C, heat preservation continues melting 10-15min, rear to clean, and it is spare to obtain molten iron；
(2) sampling of above-mentioned molten iron is detected into its component content using infrared spectroscopy, quantitatively adds manganese iron, carburetting according to testing result
Agent, molybdenum-iron and ferrochrome, adjust the temperature to 1530-1580 DEG C, and it is spare to obtain base iron by quiescence in high temperature 5-10min；
(3) vermiculizer, inovulant A and deslagging agent are added in the dykes and dams packet preheated in advance, pour base iron, and by asbestos to it
It is covered, carries out heat preservation creepage rate；
(4) the good base iron of above-mentioned compactedization is adjusted the temperature to 1400-1430 DEG C, after base iron is cast in sandbox, simultaneously
Inovulant B is added and carries out casting machine current-following inoculation；
(5) material in above-mentioned sandbox is cooled to 600-650 DEG C, after keeping the temperature a period of time, room temperature cooling to room temperature takes out casting
Part carries out sand removal processing in sand roller, obtains the high high nodulizing rate vermicular cast iron of pearlite of the present invention.
The percentage composition of the material composition of the high nodulizing rate vermicular cast iron of high pearlite are as follows: the pig iron 50%, ferrosilicon 7%,
High-carbon-chromium bearing steel 11%, foundry returns 32%；The percentage of the base iron chemical composition content are as follows: C:3.60%, S:0.03%,
Si:1.65%, P:0.03%, Mn:0.45%, Gr:0.12%, Mo:0.10% surplus are Fe；The vermiculizer is silicon-calcium-magnesium rare earth；
The inovulant A is silicon titanate innoculant, and inovulant B is silicon iron inoculator；The additive amount of the vermiculizer is base iron quality
The additive amount of 0.4%, inovulant A are the 0.12%-0.18% of base iron quality, and the additive amount of inovulant B is base iron quality
0.10%-0.14%；The temperature that the dykes and dams packet preheats in advance is 900 DEG C；Material in the sandbox is cooled to 600-650 DEG C
Afterwards, the time of heat preservation is 20-30min.
Embodiment 3:
A kind of high nodulizing rate vermicular cast iron preparation process of high pearlite, the high high nodulizing rate vermicular cast iron preparation process of pearlite
The following steps are included:
(1) by the pig iron, ferrosilicon, high-carbon-chromium bearing steel, foundry returns be added smelting furnace in, first high temperature melt, after adjust the temperature to
1530-1580 DEG C, heat preservation continues melting 10-15min, rear to clean, and it is spare to obtain molten iron；
(2) sampling of above-mentioned molten iron is detected into its component content using infrared spectroscopy, quantitatively adds manganese iron, carburetting according to testing result
Agent, molybdenum-iron and ferrochrome, adjust the temperature to 1530-1580 DEG C, and it is spare to obtain base iron by quiescence in high temperature 5-10min；
(3) vermiculizer, inovulant A and deslagging agent are added in the dykes and dams packet preheated in advance, pour base iron, and by asbestos to it
It is covered, carries out heat preservation creepage rate；
(4) the good base iron of above-mentioned compactedization is adjusted the temperature to 1400-1430 DEG C, after base iron is cast in sandbox, simultaneously
Inovulant B is added and carries out casting machine current-following inoculation；
(5) material in above-mentioned sandbox is cooled to 600-650 DEG C, after keeping the temperature a period of time, room temperature cooling to room temperature takes out casting
Part carries out sand removal processing in sand roller, obtains the high high nodulizing rate vermicular cast iron of pearlite of the present invention.
The percentage composition of the material composition of the high nodulizing rate vermicular cast iron of high pearlite are as follows: the pig iron 50%, ferrosilicon 7%,
High-carbon-chromium bearing steel 11%, foundry returns 32%；The percentage of the base iron chemical composition content are as follows: C:3.55%, S:0.02%,
Si:1.5%, P:0.02%, Mn:0.4%, Gr:0.1%, Mo:0.09% surplus are Fe；The vermiculizer is silicon-calcium-magnesium rare earth；It is described
Inovulant A is silicon titanate innoculant, and inovulant B is silicon iron inoculator；The additive amount of the vermiculizer is base iron quality
The additive amount of 0.35%, inovulant A are the 0.15% of base iron quality, and the additive amount of inovulant B is the 0.12% of base iron quality；
The temperature that the dykes and dams packet preheats in advance is 900 DEG C；After material in the sandbox is cooled to 600-650 DEG C, the time of heat preservation
For 20-30min.
Embodiment 4:
Embodiment 1-3 resulting materials and using the common vermicular graphite iron material in market as control group are detected, it is detected and draws high intensity, hard
The mass loss rate of 30min is handled under degree and 1kg pressure, as a result as shown in the table:
| Group | Draw high intensity | Hardness | Mass loss |
| Embodiment 1 | 321MPa | 246HB | 490g/m³·h |
| Embodiment 2 | 318MPa | 237HB | 453g/m³·h |
| Embodiment 3 | 336MPa | 250HB | 446g/m³·h |
| Control group | 287MPa | 220HB | 650g/m³·h |
As seen from the above table, present invention gained vermicular cast iron has excellent tension ascending effect, and hardness is high, wear-resisting property is strong,
It is wherein the most excellent with 3 resulting materials performance of embodiment.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in process, method, article or equipment including the element.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although with reference to the foregoing embodiments
Invention is explained in detail, those skilled in the art should understand that: it still can be to aforementioned each implementation
Technical solution documented by example is modified or equivalent replacement of some of the technical features；And these modification or
Replacement, the spirit and scope for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution.
Claims (8)
1. a kind of high nodulizing rate vermicular cast iron preparation process of high pearlite, which is characterized in that the high high nodulizing rate of pearlite is compacted
Black cast iron preparation process the following steps are included:
(1) by the pig iron, ferrosilicon, high-carbon-chromium bearing steel, foundry returns be added smelting furnace in, first high temperature melt, after adjust the temperature to
1530-1580 DEG C, heat preservation continues melting 10-15min, rear to clean, and it is spare to obtain molten iron；
(2) sampling of above-mentioned molten iron is detected into its component content using infrared spectroscopy, quantitatively adds manganese iron, carburetting according to testing result
Agent, molybdenum-iron and ferrochrome, adjust the temperature to 1530-1580 DEG C, and it is spare to obtain base iron by quiescence in high temperature 5-10min；
(3) vermiculizer, inovulant A and deslagging agent are added in the dykes and dams packet preheated in advance, pour base iron, and by asbestos to it
It is covered, carries out heat preservation creepage rate；
(4) the good base iron of above-mentioned compactedization is adjusted the temperature to 1400-1430 DEG C, after base iron is cast in sandbox, simultaneously
Inovulant B is added and carries out casting machine current-following inoculation；
(5) material in above-mentioned sandbox is cooled to 600-650 DEG C, after keeping the temperature a period of time, room temperature cooling to room temperature takes out casting
Part carries out sand removal processing in sand roller, obtains the high high nodulizing rate vermicular cast iron of pearlite of the present invention.
2. a kind of high high nodulizing rate vermicular cast iron preparation process of pearlite according to claim 1, which is characterized in that described
The percentage composition of the material composition of the high high nodulizing rate vermicular cast iron of pearlite are as follows: the pig iron 50%, ferrosilicon 7%, high-carbon-chromium bearing steel
11%, foundry returns 32%.
3. a kind of high high nodulizing rate vermicular cast iron preparation process of pearlite according to claim 1, which is characterized in that described
The percentage of base iron chemical composition content are as follows: C:3.45%-3.60%, S:0.02%-0.03%, Si:1.45%-1.65%, P:
0.02%-0.03%, Mn:0.35%-0.45%, Gr:0.08%-0.12%, Mo:0.08%-0.10% surplus are Fe.
4. a kind of high high nodulizing rate vermicular cast iron preparation process of pearlite according to claim 1, it is characterised in that: described
Vermiculizer is silicon-calcium-magnesium rare earth.
5. a kind of high high nodulizing rate vermicular cast iron preparation process of pearlite according to claim 1, it is characterised in that: described
Inovulant A is silicon titanate innoculant, and inovulant B is silicon iron inoculator.
6. a kind of high high nodulizing rate vermicular cast iron preparation process of pearlite according to claim 1, it is characterised in that: described
The additive amount of vermiculizer is the 0.3%-0.4% of base iron quality, and the additive amount of inovulant A is the 0.12%- of base iron quality
The additive amount of 0.18%, inovulant B are the 0.10%-0.14% of base iron quality.
7. a kind of high high nodulizing rate vermicular cast iron preparation process of pearlite according to claim 1, it is characterised in that: described
The temperature that dykes and dams packet preheats in advance is 900 DEG C.
8. a kind of high high nodulizing rate vermicular cast iron preparation process of pearlite according to claim 1, it is characterised in that: described
After material in sandbox is cooled to 600-650 DEG C, the time of heat preservation is 20-30min.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102676906A (en) * | 2012-06-20 | 2012-09-19 | 丹阳市锦雄机械制造有限公司 | Preparation method of compacted graphite cast iron |
| CN107354369A (en) * | 2017-06-20 | 2017-11-17 | 哈尔滨汽轮机厂有限责任公司 | A kind of spheroidal graphite cast-iron containing molybdenum used under 500 DEG C of high temperature and preparation method thereof |
-
2018
- 2018-10-09 CN CN201811171408.XA patent/CN109280844A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102676906A (en) * | 2012-06-20 | 2012-09-19 | 丹阳市锦雄机械制造有限公司 | Preparation method of compacted graphite cast iron |
| CN107354369A (en) * | 2017-06-20 | 2017-11-17 | 哈尔滨汽轮机厂有限责任公司 | A kind of spheroidal graphite cast-iron containing molybdenum used under 500 DEG C of high temperature and preparation method thereof |
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