CN108796359A - A kind of spheroidal graphite cast-iron of high-wear resistance - Google Patents
A kind of spheroidal graphite cast-iron of high-wear resistance Download PDFInfo
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- CN108796359A CN108796359A CN201810779307.4A CN201810779307A CN108796359A CN 108796359 A CN108796359 A CN 108796359A CN 201810779307 A CN201810779307 A CN 201810779307A CN 108796359 A CN108796359 A CN 108796359A
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- iron
- spheroidal graphite
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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
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D5/00—Heat treatments 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
- C22C37/04—Cast-iron alloys containing spheroidal graphite
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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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- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
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- Crystallography & Structural Chemistry (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 spheroidal graphite cast-iron of high-wear resistance, the weight percent of each chemical constituent is：Carbon 3.5-3.6%, silicon 2-2.2%, manganese 0.5-0.6%, vanadium 0.2-0.3%, tungsten 0.6-0.8%, antimony 0.02-0.04%, molybdenum 0.5-0.6%, rare earth 0.01-0.04%, phosphorus≤0.04%, sulphur≤0.01%, surplus are Fe and inevitable impurity.The present invention by melting, cast, heat treatment and etc. be made, improved by rational technological parameter and formula composition, spheroidal graphite cast-iron obtained has good wear-resisting property, extends the service life of spheroidal graphite cast-iron.
Description
Technical field
The present invention relates to casting technology fields, more particularly to a kind of spheroidal graphite cast-iron of high-wear resistance.
Background technology
Spheroidal graphite cast-iron is by breeding the cast iron materials with globular graphite obtained with spheroidising, having excellent power
The advantages that learning performance, processing performance, wear-resisting property, relatively low shock-absorbing performance and production cost, its comprehensive performance are similar to steel, just
It is to make it be successfully used to cast some stress complexity, intensity, toughness, wearability are more demanding because of its excellent performance
Part such as auto-parts, cast iron pipe fittings, wind-powered electricity generation parts, machine tool accessory, engine crankshaft etc..
The wear-resisting property of spheroidal graphite cast-iron in the prior art is not high enough, cannot increasingly meet actual requirement of engineering.
Invention content
In order to make up the defect of prior art, the present invention provides a kind of spheroidal graphite cast-iron of high-wear resistance.
The technical problems to be solved by the invention are achieved by the following technical programs：
A kind of spheroidal graphite cast-iron of high-wear resistance, the weight percent of each chemical constituent are：Carbon 3.5-3.6%, silicon 2-2.2%,
Manganese 0.5-0.6%, vanadium 0.2-0.3%, tungsten 0.6-0.8%, antimony 0.02-0.04%, molybdenum 0.5-0.6%, rare earth 0.01-0.04%, phosphorus≤
0.04%, sulphur≤0.01%, surplus are Fe and inevitable impurity.
Further, preparation method includes the following steps：
S1. raw material melting：Dispensing is carried out according to the component of alloy and content, first fills carburant, the pig iron, steel scrap, ferrotungsten, molybdenum-iron
Enter in medium-frequency induction furnace, is removed the gred, skimmed after being all melt into iron liquid, kept the temperature, spectral component analysis, when bonded hard ferrite magnet liter
To addition ferromanganese, ferrosilicon, vanadium iron at 1440 DEG C -1480 DEG C；
S2. spheroidising and inoculation：Nodulizer is added in nodularization packet, is covered on nodulizer and accounts for iron liquid total weight 0.4-
0.6% the first inovulant covers cheet scrap on the first inovulant, and consolidation pours iron liquid, and bonded hard ferrite magnet is 1400-1430 DEG C,
After completing spheroidising and Bao Nei inoculations, add in the second inovulant carry out type of iron liquid total weight 0.4%-0.6%
It breeds；
S3. it pours into a mould：It is poured into a mould, random inoculant, which is added, while cast carries out current-following inoculation；
S4. it is heat-treated：Casting after casting complete is warming up to 900-910 DEG C, keeps the temperature 3-4h, is dropped with the speed of 6-9 DEG C/min
Temperature keeps the temperature 3-5h, is air-cooled to room temperature to 650-700 DEG C；Casting after will be air-cooled is warming up to 890-920 DEG C, with 13-15 DEG C/min
Speed be cooled to 400-450 DEG C, carry out stress relief annealing after being air-cooled to room temperature, obtain the spheroidal graphite cast-iron.
Further, the nodulizer is made of following weight percent composition：Carbon 42-45%, calcium 0.8-1.2%, barium
1-1.5%, magnesium 5.5-6.5%, rare earth 0.8-1.0%, aluminium<1.2%, surplus Fe.
Further, the granularity of the nodulizer is 5-30mm.
Further, first inovulant is made of following weight percent composition：Silicon 55-70%, zirconium 0.8-
3.2%, niobium 1.2-2.5%, calcium 2.8-5.5%, barium 1.85-3.58%, magnesium≤0.15%, aluminium≤0.2%, manganese≤
0.26%, sulphur≤0.02%, phosphorus≤0.05%, surplus are iron.
Further, second inovulant is made of following weight percent composition：Silicon 60-70%, barium 2-6%, calcium
0.5-2.0%, aluminium 1-2%, surplus are iron.
Further, the random inoculant is made of following weight percent composition：Silicon 73-78%, zirconium 1.0-
1.5%, strontium 0.8-1.2%, calcium≤0.1%, aluminium≤0.5%, surplus Fe.
Further, the random inoculant accounts for the 0.1-0.2% of iron liquid total weight.
The present invention has the advantages that：
The present invention by melting, cast, heat treatment and etc. be made, improved by rational technological parameter and formula composition, system
The spheroidal graphite cast-iron obtained has good wear-resisting property, extends the service life of spheroidal graphite cast-iron.
Specific implementation mode
With reference to embodiment, the present invention will be described in detail, and embodiment is only the preferred embodiment of the present invention,
It is not limitation of the invention.
Embodiment 1
A kind of spheroidal graphite cast-iron of high-wear resistance, the weight percent of each chemical constituent are：Carbon 3.5%, silicon 2.1%, manganese 0.5%,
Vanadium 0.2%, tungsten 0.7%, antimony 0.03%, molybdenum 0.55%, rare earth 0.03%, phosphorus≤0.04%, sulphur≤0.01%, surplus are Fe and can not
The impurity avoided.
Preparation method includes the following steps：
S1. raw material melting：Dispensing is carried out according to the component of alloy and content, first fills carburant, the pig iron, steel scrap, ferrotungsten, molybdenum-iron
Enter in medium-frequency induction furnace, is removed the gred, skimmed after being all melt into iron liquid, kept the temperature, spectral component analysis, when bonded hard ferrite magnet liter
To addition ferromanganese, ferrosilicon, vanadium iron at 1460 DEG C；
S2. spheroidising and inoculation：Nodulizer is added in nodularization packet, is covered on nodulizer and accounts for iron liquid total weight 0.5%
The first inovulant, cheet scrap is covered on the first inovulant, consolidation pours iron liquid, and bonded hard ferrite magnet is 1420 DEG C, is completed at nodularization
In reason and packet after inoculation, the second inovulant for adding iron liquid total weight 0.5% carries out mould cavity inoculation；
S3. it pours into a mould：It is poured into a mould, the 0.15% random inoculant progress for accounting for iron liquid total weight is added while cast with stream
It breeds；
S4. it is heat-treated：Casting after casting complete is warming up to 905 DEG C, 3.5h is kept the temperature, 670 is cooled to the speed of 8 DEG C/min
DEG C, 4h is kept the temperature, room temperature is air-cooled to；Casting after will be air-cooled is warming up to 900 DEG C, is cooled to 420 DEG C with the speed of 14 DEG C/min, sky
Stress relief annealing is carried out after being cooled to room temperature, obtains the spheroidal graphite cast-iron.
Wherein, the nodulizer is made of following weight percent composition：It is carbon 43%, calcium 1%, barium 1.2%, magnesium 6%, dilute
Soil 0.9%, aluminium<1.2%, surplus Fe；The granularity of the nodulizer is 5-30mm；First inovulant is by following weight hundred
Point than at being grouped as：Silicon 62%, zirconium 2%, niobium 2%, calcium 4.2%, barium 2.5%, magnesium≤0.15%, aluminium≤0.2%, manganese≤
0.26%, sulphur≤0.02%, phosphorus≤0.05%, surplus are iron；Second inovulant is made of following weight percent composition：
Silicon 65%, barium 4%, calcium 1.2%, aluminium 1.5%, surplus are iron；The random inoculant is made of following weight percent composition：Silicon
75%, zirconium 1.2%, strontium 1%, calcium≤0.1%, aluminium≤0.5%, surplus Fe.
Embodiment 2
A kind of spheroidal graphite cast-iron of high-wear resistance, the weight percent of each chemical constituent are：Carbon 3.5%, silicon 2%, manganese 0.5%, vanadium
0.2%, tungsten 0.6%, antimony 0.02%, molybdenum 0.5%, rare earth 0.01%, phosphorus≤0.04%, sulphur≤0.01%, surplus is for Fe and unavoidably
Impurity.
Preparation method includes the following steps：
S1. raw material melting：Dispensing is carried out according to the component of alloy and content, first fills carburant, the pig iron, steel scrap, ferrotungsten, molybdenum-iron
Enter in medium-frequency induction furnace, is removed the gred, skimmed after being all melt into iron liquid, kept the temperature, spectral component analysis, when bonded hard ferrite magnet liter
To addition ferromanganese, ferrosilicon, vanadium iron at 1440 DEG C；
S2. spheroidising and inoculation：Nodulizer is added in nodularization packet, is covered on nodulizer and accounts for iron liquid total weight 0.4%
The first inovulant, cheet scrap is covered on the first inovulant, consolidation pours iron liquid, and bonded hard ferrite magnet is 1400 DEG C, is completed at nodularization
In reason and packet after inoculation, the second inovulant for adding iron liquid total weight 0.4% carries out mould cavity inoculation；
S3. it pours into a mould：Poured into a mould, cast while be added account for iron liquid total weight 0.1% random inoculant carry out with flow it is pregnant
It educates；
S4. it is heat-treated：Casting after casting complete is warming up to 900 DEG C, 3h is kept the temperature, 650 is cooled to the speed of 6 DEG C/min
DEG C, 3h is kept the temperature, room temperature is air-cooled to；Casting after will be air-cooled is warming up to 890 DEG C, is cooled to 400 DEG C with the speed of 13 DEG C/min, sky
Stress relief annealing is carried out after being cooled to room temperature, obtains the spheroidal graphite cast-iron.
Wherein, the nodulizer is made of following weight percent composition：Carbon 42%, calcium 0.8%, barium 1%, magnesium 5.5%,
Rare earth 0.8%, aluminium<1.2%, surplus Fe；The granularity of the nodulizer is 5-30mm；First inovulant is by following weight
Percent composition forms：Silicon 55%, zirconium 0.8%, niobium 1.2%, calcium 2.8%, barium 1.85%, magnesium≤0.15%, aluminium≤
0.2%, manganese≤0.26%, sulphur≤0.02%, phosphorus≤0.05%, surplus are iron；Second inovulant is by following weight percent
Than at being grouped as：Silicon 60%, barium 2%, calcium 0.5%, aluminium 1%, surplus are iron；The random inoculant is by following weight percent composition
Composition：Silicon 73%, zirconium 1.0.5%, strontium 0.8%, calcium≤0.1%, aluminium≤0.5%, surplus Fe.
Embodiment 3
A kind of spheroidal graphite cast-iron of high-wear resistance, the weight percent of each chemical constituent are：Carbon 3.6%, silicon 2.2%, manganese 0.6%,
Vanadium 0.3%, tungsten 0.8%, antimony 0.04%, molybdenum 0.6%, rare earth 0.04%, phosphorus≤0.04%, sulphur≤0.01%, surplus are Fe and can not keep away
The impurity exempted from.
Preparation method includes the following steps：
S1. raw material melting：Dispensing is carried out according to the component of alloy and content, first fills carburant, the pig iron, steel scrap, ferrotungsten, molybdenum-iron
Enter in medium-frequency induction furnace, is removed the gred, skimmed after being all melt into iron liquid, kept the temperature, spectral component analysis, when bonded hard ferrite magnet liter
To addition ferromanganese, ferrosilicon, vanadium iron at 1480 DEG C；
S2. spheroidising and inoculation：Nodulizer is added in nodularization packet, is covered on nodulizer and accounts for iron liquid total weight 0.6%
The first inovulant, cheet scrap is covered on the first inovulant, consolidation pours iron liquid, and bonded hard ferrite magnet is 1430 DEG C, is completed at nodularization
In reason and packet after inoculation, the second inovulant for adding iron liquid total weight 0.6% carries out mould cavity inoculation；
S3. it pours into a mould：Poured into a mould, cast while be added account for iron liquid total weight 0.2% random inoculant carry out with flow it is pregnant
It educates；
S4. it is heat-treated：Casting after casting complete is warming up to 910 DEG C, 4h is kept the temperature, 700 is cooled to the speed of 9 DEG C/min
DEG C, 5h is kept the temperature, room temperature is air-cooled to；Casting after will be air-cooled is warming up to 920 DEG C, is cooled to 450 DEG C with the speed of 15 DEG C/min, sky
Stress relief annealing is carried out after being cooled to room temperature, obtains the spheroidal graphite cast-iron.
Wherein, the nodulizer is made of following weight percent composition：Carbon 45%, calcium 1.2%, barium 1.5%, magnesium
6.5%, rare earth 1.0%, aluminium<1.2%, surplus Fe；The granularity of the nodulizer is 5-30mm；First inovulant by with
Lower weight percent composition composition：Silicon 70%, zirconium 3.2%, niobium 2.5%, calcium 5.5%, barium 3.58%, magnesium≤0.15%, aluminium
≤ 0.2%, manganese≤0.26%, sulphur≤0.02%, phosphorus≤0.05%, surplus are iron；Second inovulant is by following weight hundred
Point than at being grouped as：Silicon 70%, barium 6%, calcium 2.0%, aluminium 2%, surplus are iron；The random inoculant by following weight percent at
It is grouped as：Silicon 78%, zirconium 1.5%, strontium 1.2%, calcium≤0.1%, aluminium≤0.5%, surplus Fe.
Embodiments of the present invention above described embodiment only expresses, the description thereof is more specific and detailed, but can not
Therefore it is interpreted as the limitation to the scope of the claims of the present invention, as long as skill obtained in the form of equivalent substitutions or equivalent transformations
Art scheme should all be fallen within the scope and spirit of the invention.
Claims (7)
1. a kind of spheroidal graphite cast-iron of high-wear resistance, the weight percent of each chemical constituent are：Carbon 3.5-3.6%, silicon 2-
2.2%, manganese 0.5-0.6%, vanadium 0.2-0.3%, tungsten 0.6-0.8%, antimony 0.02-0.04%, molybdenum 0.5-0.6%, rare earth 0.01-0.04%,
Phosphorus≤0.04%, sulphur≤0.01%, surplus are Fe and inevitable impurity.
2. spheroidal graphite cast-iron as described in claim 1, which is characterized in that preparation method includes the following steps：
S1. raw material melting：Dispensing is carried out according to the component of alloy and content, first fills carburant, the pig iron, steel scrap, ferrotungsten, molybdenum-iron
Enter in medium-frequency induction furnace, is removed the gred, skimmed after being all melt into iron liquid, kept the temperature, spectral component analysis, when bonded hard ferrite magnet liter
To addition ferromanganese, ferrosilicon, vanadium iron at 1440 DEG C -1480 DEG C；
S2. spheroidising and inoculation：Nodulizer is added in nodularization packet, is covered on nodulizer and accounts for iron liquid total weight 0.4-
0.6% the first inovulant covers cheet scrap on the first inovulant, and consolidation pours iron liquid, and bonded hard ferrite magnet is 1400-1430 DEG C,
After completing spheroidising and Bao Nei inoculations, add in the second inovulant carry out type of iron liquid total weight 0.4%-0.6%
It breeds；
S3. it pours into a mould：It is poured into a mould, random inoculant, which is added, while cast carries out current-following inoculation；
S4. it is heat-treated：Casting after casting complete is warming up to 900-910 DEG C, keeps the temperature 3-4h, is dropped with the speed of 6-9 DEG C/min
Temperature keeps the temperature 3-5h, is air-cooled to room temperature to 650-700 DEG C；Casting after will be air-cooled is warming up to 890-920 DEG C, with 13-15 DEG C/min
Speed be cooled to 400-450 DEG C, carry out stress relief annealing after being air-cooled to room temperature, obtain the spheroidal graphite cast-iron.
3. spheroidal graphite cast-iron as claimed in claim 2, the nodulizer is made of following weight percent composition：Carbon 42-45%,
Calcium 0.8-1.2%, barium 1-1.5%, magnesium 5.5-6.5%, rare earth 0.8-1.0%, aluminium<1.2%, surplus Fe.
4. the granularity of spheroidal graphite cast-iron as claimed in claim 2, the nodulizer is 5-30mm.
5. spheroidal graphite cast-iron as claimed in claim 2, first inovulant is made of following weight percent composition：Silicon 55-
70%, zirconium 0.8-3.2%, niobium 1.2-2.5%, calcium 2.8-5.5%, barium 1.85-3.58%, magnesium≤0.15%, aluminium≤
0.2%, manganese≤0.26%, sulphur≤0.02%, phosphorus≤0.05%, surplus are iron.
6. spheroidal graphite cast-iron as claimed in claim 2, second inovulant is made of following weight percent composition：Silicon 60-
70%, barium 2-6%, calcium 0.5-2.0%, aluminium 1-2%, surplus are iron.
7. spheroidal graphite cast-iron as claimed in claim 2, the random inoculant is made of following weight percent composition：Silicon 73-
78%, zirconium 1.0-1.5%, strontium 0.8-1.2%, calcium≤0.1%, aluminium≤0.5%, surplus Fe.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111549272A (en) * | 2020-05-16 | 2020-08-18 | 江苏金玉龙铁路器材有限公司 | Preparation method of novel nodular cast iron railway turnout fitting |
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Application publication date: 20181113 |
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