CN106906346A - A kind of heat treatment method of cast iron sprocket wheel - Google Patents
A kind of heat treatment method of cast iron sprocket wheel Download PDFInfo
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- CN106906346A CN106906346A CN201710286878.XA CN201710286878A CN106906346A CN 106906346 A CN106906346 A CN 106906346A CN 201710286878 A CN201710286878 A CN 201710286878A CN 106906346 A CN106906346 A CN 106906346A
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- Prior art keywords
- iron
- sprocket wheel
- molten iron
- analysis
- cast
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Classifications
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- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/32—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for gear wheels, worm wheels, or the like
-
- 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
-
- 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
- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/009—Pearlite
-
- 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)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
- Investigating And Analyzing Materials By Characteristic Methods (AREA)
Abstract
The invention discloses a kind of heat treatment method of cast iron sprocket wheel, the percentage by weight of described its composition of cast iron sprocket wheel is C2.4~2.6%, Si2.0~2.2%, Mn0.4~0.6%, Cu0.8~1.0%, Sn0.04~0.08%, Sb0.006~0.008%, S0.08~0.18%, P0.05~0.09%, balance of Fe.Described method includes dispensing, preheating, melting, both analysis, final deoxidizing, inoculation, cast, pearliteization treatment.The method process is simple, is processed by controlling carbon in cast iron, silicon total amount and copper, tin, the content of antimony and pearliteization, casts out intensity and hardness pearlite iron higher, while reducing production cost, is particularly suitable for cast sprocket.
Description
Technical field
The present invention relates to the production technical field of ferrous metal, especially a kind of heat treatment method of cast iron sprocket wheel.
Background technology
Abroad, until 1722 France just appearance white heart malleable cast iron, the U.S. just tests black heart malleable successfully within 1931
Cast iron.China is the country for using malleable cast iron earliest, and production technology is updated, and particularly short annealing aspect obtains many
Achievement, the annealing cycle shortens to 30 current~40h from 100 initial~120h, and performance can be stablized more than KT35-10, extensively
The industries such as automobile, railway, electric power, machine-building are applied to generally.In addition, intensity and hardness in order to improve malleable cast iron sprocket wheel
Performance, need to carry out pearlite treatment.
The content of the invention
It is an object of the present invention to regarding to the issue above, a kind of cast iron sprocket wheel and preparation method thereof is proposed, by controlling to cast
Carbon, silicon total amount and copper, tin, the content of antimony and pearliteization treatment, cast out intensity and hardness pearlite higher can in iron
Forging cast iron.
The technical solution adopted for the present invention to solve the technical problems is：Including following several steps：
The first step：Dispensing：Steel scrap, foundry returns, the pig iron, ferromanganese, ferrosilicon, fine copper, pure tin, star antimony are pressed into C2.4~2.6%, Si2.0
~2.2%, Mn0.4~0.6%, Cu0.8~1.0%, Sn0.04~0.08%, Sb0.006~0.008%, S0.08~0.18%,
P0.05~0.09%, the mode of balance of Fe percentage by weights carries out dispensing；
Second step：Preheating：Will optimize calculate steel scrap, foundry returns, the pig iron input intermediate frequency furnace in preheated；
3rd step：Melting：By the steel scrap in intermediate frequency furnace, foundry returns, the pig iron fusing after, put into its quantity for furnace charge 18~
28%, composition carries out pre-deoxidation for the deoxidier of lime 70%+ fluorites 30%, then puts into the ferromanganese ferrosilicon of baking treatment, fine copper, pure
Tin and star antimony, when molten iron temperature is warming up to 1540~1600 DEG C, add 0.1% deslagging agent once to remove the gred, and are then covered by heat preserving agent etc.
Analysis to be sampled；
4th step：Both analysis：Molten iron is taken quickly to be analyzed with stokehold spectrometer analysis combination carbon silicon heat analysis, according to
Analysis result adjusts chemical composition；
5th step：Final deoxidizing：Molten iron temperature is warming up to 1540~1600 DEG C, the aluminium that its quantity is molten iron 0.1~0.3% is put into
Carry out final deoxidizing；
6th step：Inoculation：Molten iron carries out inoculation when flowing to casting ladle from intermediate frequency furnace, and it is iron water amount to add its quantity
0.3~0.5% inovulant, the granularity of inovulant is 2~6mm, and inovulant is 75 ferrosilicon；
7th step：Cast：When molten iron temperature is down to 1360~1380 DEG C, poured into a mould, obtained malleable cast iron sprocket wheel casting；
8th step：Pearliteization treatment.
In described the 8th step pearlite treatment treatment, below 200 DEG C of casting ﹤ is fitted into heat-treatment furnace, is warming up to
960~980 DEG C, insulation 32~36h stoves are cooled to 690~740 DEG C, are incubated 6~8h, and stove is cooled to 500 DEG C of air coolings of coming out of the stove, obtains pearly-lustre
Body malleable cast iron sprocket component.
The beneficial effects of the invention are as follows：Process is simple, by control carbon in cast iron, silicon total amount and copper, tin, antimony content with
And pearliteization treatment, intensity and hardness pearlite iron higher are cast out, while reducing production cost, it is particularly suitable for
Cast sprocket.
Specific embodiment
Embodiment 1：
A kind of heat treatment method of cast iron sprocket wheel of this example, including following several steps：
The first step：Dispensing：By steel scrap, foundry returns, the pig iron, ferromanganese, ferrosilicon, fine copper, pure tin, star antimony press C2.4%, Si2.0%,
Mn0.4%, Cu0.8%, Sn0.04%, Sb0.006%, S0.08%, P0.05%, the mode of balance of Fe percentage by weights are matched somebody with somebody
Material；
Second step：Preheating：Will optimize calculate steel scrap, foundry returns, the pig iron input intermediate frequency furnace in preheated；
3rd step：Melting：After by the steel scrap in intermediate frequency furnace, foundry returns, pig iron fusing, its quantity is put into for furnace charge 18%, into
Being divided into the deoxidier of lime 70%+ fluorites 30% carries out pre-deoxidation, then puts into the ferromanganese ferrosilicon of baking treatment, fine copper, pure tin and pure
Antimony, when molten iron temperature is warming up to 1540 DEG C, adds 0.1% deslagging agent once to remove the gred, and is then covered by heat preserving agent and waits sampling analysis；
4th step：Both analysis：Molten iron is taken quickly to be analyzed with stokehold spectrometer analysis combination carbon silicon heat analysis, according to
Analysis result adjusts chemical composition；
5th step：Final deoxidizing：Molten iron temperature is warming up to 1540 DEG C, putting into the aluminium that its quantity is molten iron 0.1% carries out final deoxidizing；
6th step：Inoculation：Molten iron carries out inoculation when flowing to casting ladle from intermediate frequency furnace, and it is iron water amount to add its quantity
0.3% inovulant, the granularity of inovulant is 2mm, and inovulant is 75 ferrosilicon；
7th step：Cast：When molten iron temperature is down to 1360 DEG C, poured into a mould, obtained malleable cast iron sprocket wheel casting；
8th step：Pearliteization treatment：Below 200 DEG C of casting ﹤ is fitted into heat-treatment furnace, is warming up to 960 DEG C, and insulation 32h stoves are cold
To 690 DEG C, 6h is incubated, stove is cooled to 500 DEG C of air coolings of coming out of the stove, obtains pearlite iron sprocket component.
Embodiment 2：
A kind of heat treatment method of cast iron sprocket wheel of this example, including following several steps：
The first step：Dispensing：By steel scrap, foundry returns, the pig iron, ferromanganese, ferrosilicon, fine copper, pure tin, star antimony press C2.5%, Si2.1%,
Mn0.5%, Cu0.9%, Sn0.06%, Sb0.007%, S0.13%, P0.07%, the mode of balance of Fe percentage by weights are matched somebody with somebody
Material；
Second step：Preheating：Will optimize calculate steel scrap, foundry returns, the pig iron input intermediate frequency furnace in preheated；
3rd step：Melting：After by the steel scrap in intermediate frequency furnace, foundry returns, pig iron fusing, its quantity is put into for furnace charge 23%, into
Being divided into the deoxidier of lime 70%+ fluorites 30% carries out pre-deoxidation, then puts into the ferromanganese ferrosilicon of baking treatment, fine copper, pure tin and pure
Antimony, when molten iron temperature is warming up to 1570 DEG C, adds 0.1% deslagging agent once to remove the gred, and is then covered by heat preserving agent and waits sampling analysis；
4th step：Both analysis：Molten iron is taken quickly to be analyzed with stokehold spectrometer analysis combination carbon silicon heat analysis, according to
Analysis result adjusts chemical composition；
5th step：Final deoxidizing：Molten iron temperature is warming up to 1570 DEG C, putting into the aluminium that its quantity is molten iron 0.2% carries out final deoxidizing；
6th step：Inoculation：Molten iron carries out inoculation when flowing to casting ladle from intermediate frequency furnace, and it is iron water amount to add its quantity
0.4% inovulant, the granularity of inovulant is 4mm, and inovulant is 75 ferrosilicon；
7th step：Cast：When molten iron temperature is down to 1370 DEG C, poured into a mould, obtained malleable cast iron sprocket wheel casting；
8th step：Pearliteization treatment：Below 200 DEG C of casting ﹤ is fitted into heat-treatment furnace, is warming up to 970 DEG C, is incubated 32~36h
Stove is cooled to 715 DEG C, is incubated 7h, and stove is cooled to 500 DEG C of air coolings of coming out of the stove, obtains pearlite iron sprocket component.
Embodiment 3：
A kind of heat treatment method of cast iron sprocket wheel of this example, including following several steps：
The first step：Dispensing：By steel scrap, foundry returns, the pig iron, ferromanganese, ferrosilicon, fine copper, pure tin, star antimony press C2.6%, Si2.2%,
Mn0.6%, Cu1.0%, Sn0.08%, Sb0.008%, S0.18%, P0.09%, the mode of balance of Fe percentage by weights are matched somebody with somebody
Material；
Second step：Preheating：Will optimize calculate steel scrap, foundry returns, the pig iron input intermediate frequency furnace in preheated；
3rd step：Melting：After by the steel scrap in intermediate frequency furnace, foundry returns, pig iron fusing, its quantity is put into for furnace charge 28%, into
Being divided into the deoxidier of lime 70%+ fluorites 30% carries out pre-deoxidation, then puts into the ferromanganese ferrosilicon of baking treatment, fine copper, pure tin and pure
Antimony, when molten iron temperature is warming up to 1600 DEG C, adds 0.1% deslagging agent once to remove the gred, and is then covered by heat preserving agent and waits sampling analysis；
4th step：Both analysis：Molten iron is taken quickly to be analyzed with stokehold spectrometer analysis combination carbon silicon heat analysis, according to
Analysis result adjusts chemical composition；
5th step：Final deoxidizing：Molten iron temperature is warming up to 1600 DEG C, putting into the aluminium that its quantity is molten iron 0.3% carries out final deoxidizing；
6th step：Inoculation：Molten iron carries out inoculation when flowing to casting ladle from intermediate frequency furnace, and it is iron water amount to add its quantity
0.5% inovulant, the granularity of inovulant is 6mm, and inovulant is 75 ferrosilicon；
7th step：Cast：When molten iron temperature is down to 1380 DEG C, poured into a mould, obtained malleable cast iron sprocket wheel casting；
8th step：Pearliteization treatment：Below 200 DEG C of casting ﹤ is fitted into heat-treatment furnace, is warming up to 980 DEG C, and insulation 36h stoves are cold
To 740 DEG C, 8h is incubated, stove is cooled to 500 DEG C of air coolings of coming out of the stove, obtains pearlite iron sprocket component.
Specific embodiment of the invention is described above, but these explanations can not be considered as limiting the present invention
Scope, protection scope of the present invention limits by appended claims, Wang where appointing on the basis of the claims in the present invention
What modification, equivalent and improvement etc., each falls within the Inner of protection scope of the present invention.
Claims (2)
1. a kind of heat treatment method of cast iron sprocket wheel, it is characterised in that：Including following several steps：
The first step：Dispensing：Steel scrap, foundry returns, the pig iron, ferromanganese, ferrosilicon, fine copper, pure tin, star antimony are pressed into C2.4~2.6%, Si2.0
~2.2%, Mn0.4~0.6%, Cu0.8~1.0%, Sn0.04~0.08%, Sb0.006~0.008%, S0.08~0.18%,
P0.05~0.09%, the mode of balance of Fe percentage by weights carries out dispensing；
Second step：Preheating：Will optimize calculate steel scrap, foundry returns, the pig iron input intermediate frequency furnace in preheated；
3rd step：Melting：By the steel scrap in intermediate frequency furnace, foundry returns, the pig iron fusing after, put into its quantity for furnace charge 18~
28%, composition carries out pre-deoxidation for the deoxidier of lime 70%+ fluorites 30%, then puts into the ferromanganese ferrosilicon of baking treatment, fine copper, pure
Tin and star antimony, when molten iron temperature is warming up to 1540~1600 DEG C, add 0.1% deslagging agent once to remove the gred, and are then covered by heat preserving agent etc.
Analysis to be sampled；
4th step：Both analysis：Molten iron is taken quickly to be analyzed with stokehold spectrometer analysis combination carbon silicon heat analysis, according to
Analysis result adjusts chemical composition；
5th step：Final deoxidizing：Molten iron temperature is warming up to 1540~1600 DEG C, the aluminium that its quantity is molten iron 0.1~0.3% is put into
Carry out final deoxidizing；
6th step：Inoculation：Molten iron carries out inoculation when flowing to casting ladle from intermediate frequency furnace, and it is iron water amount to add its quantity
0.3~0.5% inovulant, the granularity of inovulant is 2~6mm, and inovulant is 75 ferrosilicon；
7th step：Cast：When molten iron temperature is down to 1360~1380 DEG C, poured into a mould, obtained malleable cast iron sprocket wheel casting；
8th step：Pearliteization treatment.
2. the heat treatment method of a kind of cast iron sprocket wheel according to claim 1, it is characterised in that：In the 8th described step pearl
In body of light treatment treatment, below 200 DEG C of casting ﹤ is fitted into heat-treatment furnace, is warming up to 960~980 DEG C, is incubated 32~36h
Stove is cooled to 690~740 DEG C, is incubated 6~8h, and stove is cooled to 500 DEG C of air coolings of coming out of the stove, obtains pearlite iron sprocket component.
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| CN201710286878.XA CN106906346A (en) | 2017-04-27 | 2017-04-27 | A kind of heat treatment method of cast iron sprocket wheel |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108176824A (en) * | 2017-12-22 | 2018-06-19 | 重庆久和豪贝机械有限公司 | A kind of gear casting method and gear casting frame |
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| JP2004169149A (en) * | 2002-11-21 | 2004-06-17 | Aisin Takaoka Ltd | Weather resistant cast iron, and production method therefor |
| CN103572151A (en) * | 2013-10-12 | 2014-02-12 | 广西玉柴机器股份有限公司 | High-grade grey cast iron casting method |
| CN106521299A (en) * | 2016-12-16 | 2017-03-22 | 广西大学 | Heat treatment method for heat-resistant cast-iron boiler grate bar |
| CN106544580A (en) * | 2016-12-16 | 2017-03-29 | 广西大学 | A kind of heat treatment method of cast iron tappet |
-
2017
- 2017-04-27 CN CN201710286878.XA patent/CN106906346A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1091476A (en) * | 1993-02-18 | 1994-08-31 | 佟树林 | The manufacture method of hard boron alloy and liner plate grinding ball thereof |
| JP2004169149A (en) * | 2002-11-21 | 2004-06-17 | Aisin Takaoka Ltd | Weather resistant cast iron, and production method therefor |
| CN103572151A (en) * | 2013-10-12 | 2014-02-12 | 广西玉柴机器股份有限公司 | High-grade grey cast iron casting method |
| CN106521299A (en) * | 2016-12-16 | 2017-03-22 | 广西大学 | Heat treatment method for heat-resistant cast-iron boiler grate bar |
| CN106544580A (en) * | 2016-12-16 | 2017-03-29 | 广西大学 | A kind of heat treatment method of cast iron tappet |
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| 日本钢铁协会编，徐君文等译: "《新版钢铁技术讲座 第5卷 铸铁与铸钢》", 30 November 1982, 上海科学技术出版社 * |
| 陆文华主编: "《铸造合金及其熔炼》", 31 October 1996, 机械工业出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108176824A (en) * | 2017-12-22 | 2018-06-19 | 重庆久和豪贝机械有限公司 | A kind of gear casting method and gear casting frame |
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