CN106521309A - Heat resisting cast iron boiler furnace bar and preparation method thereof - Google Patents
Heat resisting cast iron boiler furnace bar and preparation method thereof Download PDFInfo
- Publication number
- CN106521309A CN106521309A CN201611164629.5A CN201611164629A CN106521309A CN 106521309 A CN106521309 A CN 106521309A CN 201611164629 A CN201611164629 A CN 201611164629A CN 106521309 A CN106521309 A CN 106521309A
- Authority
- CN
- China
- Prior art keywords
- iron
- cast iron
- heat
- analysis
- resisting cast
- 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
- 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
- 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
- C22C37/06—Cast-iron alloys containing chromium
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
Abstract
The invention discloses a heat resisting cast iron boiler furnace bar and a preparation method thereof. The heat resisting cast iron boiler furnace bar comprises the following components in percentage by weight: 2.2-2.6% of C, 5-6% of Si, 0.7-0.9% of Mn, 0.6-1.0% of Cr, P not more than 0.2%, S not more than 0.12%, and the balance of Fe. The preparation method comprises batching, preheating, smelting, quick analysis in front of a furnace, final deoxidation, inoculation and casting. The method is simple in casting process, prevents cast iron oxidation and low-temperature growth through controlling adding quantities of carbon, silicon and chromium in cast iron, casts heat resisting cast iron, and in particular, is suitable for the boiler furnace bar of a boiler.
Description
Technical field
The present invention relates to the production technical field of ferrous metal, especially a kind of heat-resisting cast iron boiler grate bar and its preparation side
Method.
Background technology
In the industrial production, some parts are worked under the high temperature conditions, and such as boiler fitting, petrochemical industry, metallurgy set
Standby part etc., as they are acted on by high temperature, than more fragile at normal temperatures, it requires that part has and supports at high temperature
The performance of collapse resistance.
The content of the invention
It is an object of the present invention to be directed to the problems referred to above, a kind of heat-resisting cast iron boiler grate bar and preparation method thereof is proposed, led to
Control carbon in cast iron, silicon, the addition of chromium are crossed, heat-resisting cast iron boiler grate bar is cast out.
The technical solution adopted for the present invention to solve the technical problems is：The percentage by weight of its composition is：C2.2～
2.6%th, Si5～6%, Mn0.7～0.9%, Cr0.6～1.0%, P≤0.2%, S≤0.12%, balance of Fe.
A kind of method for preparing heat-resisting cast iron boiler grate bar, including following several steps：
The first step：Dispensing：By steel scrap, foundry returns, the pig iron, ferrosilicon, ferromanganese, ferrochrome press C2.2～2.6%, Si5～6%, Mn0.7～
0.9%th, Cr0.6～1.0%, P≤0.2%, S≤0.12%, the mode of balance of Fe percentage by weights carry out dispensing；
Second step：Preheating：By optimization 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, put into its quantity for furnace charge 15～
25%, composition carries out pre-deoxidation for the deoxidier of lime 60%+ fluorites 40%, then puts into ferrosilicon, ferromanganese and ferrochrome that baking processes and obtain
To iron liquid, when bonded hard ferrite magnet is warming up to 1490～1640 DEG C, add 0.1% deslagging agent once to remove the gred, be then covered by heat preserving agent wait
Sample analysis；
4th step：Both analysis：Take iron liquid stokehold spectrometer analysis quickly to be analyzed with reference to carbon silicon heat analysis, according to
Analysis result adjusts chemical composition；
5th step：Final deoxidizing：Bonded hard ferrite magnet is warming up to into 1490～1640 DEG C, the aluminium that its quantity is iron liquid 0.1～0.3% is put into
Carry out final deoxidizing；
6th step：Inoculation：Iron liquid carries out inoculation when flowing to casting ladle from intermediate frequency furnace, adds its quantity to be iron liquid amount
0.3～0.5% inovulant, the granularity of inovulant is 2～6mm, and inovulant is 75 ferrosilicon；
7th step：Cast：When bonded hard ferrite magnet is down to 1470～1540 DEG C, poured into a mould, obtained the casting of heat-resisting cast iron boiler grate bar
Part.
The invention has the beneficial effects as follows：Casting technique is simple, by the addition for controlling carbon in cast iron, silicon, chromium, prevents casting
Iron is aoxidized and low-temperature epitaxy, is cast out heat-resisting cast iron, is particularly suitable for the boiler grate bar of boiler.
Specific embodiment
Embodiment 1：
A kind of method for preparing heat-resisting cast iron boiler grate bar of this example, including following several steps：
The first step：Dispensing：Steel scrap, foundry returns, the pig iron, ferrosilicon, ferromanganese, ferrochrome are pressed into C2.2%, Si5%, Mn0.7%, Cr0.6%, P
≤ 0.2%, S≤0.12%, the mode of balance of Fe percentage by weights carry out dispensing；
Second step：Preheating：By optimization 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, it is furnace charge 15% to put into its quantity, into
The deoxidier for being divided into lime 60%+ fluorites 40% carries out pre-deoxidation, then puts into ferrosilicon, ferromanganese and ferrochrome that baking processes and obtain iron
Liquid, when bonded hard ferrite magnet is warming up to 1490 DEG C, adds 0.1% deslagging agent once to remove the gred, is then covered by heat preserving agent and waits sample analysis；
4th step：Both analysis：Take iron liquid stokehold spectrometer analysis quickly to be analyzed with reference to carbon silicon heat analysis, according to
Analysis result adjusts chemical composition；
5th step：Final deoxidizing：Bonded hard ferrite magnet is warming up to into 1490 DEG C, putting into the aluminium that its quantity is iron liquid 0.1% carries out final deoxidizing；
6th step：Inoculation：Iron liquid carries out inoculation when flowing to casting ladle from intermediate frequency furnace, adds its quantity to be iron liquid amount
0.3% inovulant, the granularity of inovulant is 2mm, and inovulant is 75 ferrosilicon；
7th step：Cast：When bonded hard ferrite magnet is down to 1470 DEG C, poured into a mould, obtained heat-resisting cast iron boiler grate bar foundry goods.
Embodiment 2：
A kind of method for preparing heat-resisting cast iron boiler grate bar of this example, including following several steps：
The first step：Dispensing：By steel scrap, foundry returns, the pig iron, ferrosilicon, ferromanganese, ferrochrome press C2.4%, Si5.5%, Mn0.8%,
Cr0.8%, P≤0.2%, S≤0.12%, the mode of balance of Fe percentage by weights carry out dispensing；
Second step：Preheating：By optimization 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, it is furnace charge 20% to put into its quantity, into
The deoxidier for being divided into lime 60%+ fluorites 40% carries out pre-deoxidation, then puts into ferrosilicon, ferromanganese and ferrochrome that baking processes and obtain iron
Liquid, when bonded hard ferrite magnet is warming up to 1515 DEG C, adds 0.1% deslagging agent once to remove the gred, is then covered by heat preserving agent and waits sample analysis；
4th step：Both analysis：Take iron liquid stokehold spectrometer analysis quickly to be analyzed with reference to carbon silicon heat analysis, according to
Analysis result adjusts chemical composition；
5th step：Final deoxidizing：Bonded hard ferrite magnet is warming up to into 1515 DEG C, putting into the aluminium that its quantity is iron liquid 0.2% carries out final deoxidizing；
6th step：Inoculation：Iron liquid carries out inoculation when flowing to casting ladle from intermediate frequency furnace, adds its quantity to be iron liquid amount
0.4% inovulant, the granularity of inovulant is 4mm, and inovulant is 75 ferrosilicon；
7th step：Cast：When bonded hard ferrite magnet is down to 1505 DEG C, poured into a mould, obtained heat-resisting cast iron boiler grate bar foundry goods.
Embodiment 3：
A kind of method for preparing heat-resisting cast iron boiler grate bar of this example, including following several steps：
The first step：Dispensing：Steel scrap, foundry returns, the pig iron, ferrosilicon, ferromanganese, ferrochrome are pressed into C2.6%, Si6%, Mn0.9%, Cr1.0%, P
≤ 0.2%, S≤0.12%, the mode of balance of Fe percentage by weights carry out dispensing；
Second step：Preheating：By optimization 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, it is furnace charge 25% to put into its quantity, into
The deoxidier for being divided into lime 60%+ fluorites 40% carries out pre-deoxidation, then puts into ferrosilicon, ferromanganese and ferrochrome that baking processes and obtain iron
Liquid, when bonded hard ferrite magnet is warming up to 1640 DEG C, adds 0.1% deslagging agent once to remove the gred, is then covered by heat preserving agent and waits sample analysis；
4th step：Both analysis：Take iron liquid stokehold spectrometer analysis quickly to be analyzed with reference to carbon silicon heat analysis, according to
Analysis result adjusts chemical composition；
5th step：Final deoxidizing：Bonded hard ferrite magnet is warming up to into 1640 DEG C, putting into the aluminium that its quantity is iron liquid 0.3% carries out final deoxidizing；
6th step：Inoculation：Iron liquid carries out inoculation when flowing to casting ladle from intermediate frequency furnace, adds its quantity to be iron liquid amount
0.5% inovulant, the granularity of inovulant is 6mm, and inovulant is 75 ferrosilicon；
7th step：Cast：When bonded hard ferrite magnet is down to 1540 DEG C, poured into a mould, obtained heat-resisting cast iron boiler grate bar foundry goods.
Above the specific embodiment of the present invention is described, but these explanations can not be considered as limiting the present invention
Scope, protection scope of the present invention limited by appended claims, where appointing on the basis of the claims in the present invention
What modification, equivalent and improvement etc., each fall within protection scope of the present invention it.
Claims (2)
1. a kind of heat-resisting cast iron boiler grate bar, it is characterised in that：The percentage by weight of its composition is：C2.2～2.6%, Si5～
6%th, Mn0.7～0.9%, Cr0.6～1.0%, P≤0.2%, S≤0.12%, balance of Fe.
2. a kind of method of the heat-resisting cast iron boiler grate bar prepared described in claim 1, it is characterised in that:Including following several steps
Suddenly：
The first step：Dispensing：Steel scrap, foundry returns, the pig iron, ferrosilicon, ferromanganese and ferrochrome are pressed into C2.2～2.6%, Si5～6%, Mn0.7
～0.9%, Cr0.6～1.0%, P≤0.2%, S≤0.12%, the mode of balance of Fe percentage by weights carry out dispensing；
Second step：Preheating：By optimization 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, put into its quantity for furnace charge 15～
25%, composition carries out pre-deoxidation for the deoxidier of lime 60%+ fluorites 40%, then puts into ferrosilicon, ferromanganese and ferrochrome that baking processes and obtain
To iron liquid, when bonded hard ferrite magnet is warming up to 1490～1640 DEG C, add 0.1% deslagging agent once to remove the gred, be then covered by heat preserving agent wait
Sample analysis；
4th step：Both analysis：Take iron liquid stokehold spectrometer analysis quickly to be analyzed with reference to carbon silicon heat analysis, according to
Analysis result adjusts chemical composition；
5th step：Final deoxidizing：Bonded hard ferrite magnet is warming up to into 1490～1640 DEG C, the aluminium that its quantity is iron liquid 0.1～0.3% is put into
Carry out final deoxidizing；
6th step：Inoculation：Iron liquid carries out inoculation when flowing to casting ladle from intermediate frequency furnace, adds its quantity to be iron liquid amount
0.3～0.5% inovulant, the granularity of inovulant is 2～6mm, and inovulant is 75 ferrosilicon；
7th step：Cast：When bonded hard ferrite magnet is down to 1470～1540 DEG C, poured into a mould, obtained the casting of heat-resisting cast iron boiler grate bar
Part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611164629.5A CN106521309A (en) | 2016-12-16 | 2016-12-16 | Heat resisting cast iron boiler furnace bar and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611164629.5A CN106521309A (en) | 2016-12-16 | 2016-12-16 | Heat resisting cast iron boiler furnace bar and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106521309A true CN106521309A (en) | 2017-03-22 |
Family
ID=58339979
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611164629.5A Pending CN106521309A (en) | 2016-12-16 | 2016-12-16 | Heat resisting cast iron boiler furnace bar and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106521309A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106929749A (en) * | 2017-04-21 | 2017-07-07 | 龙邹 | A kind of cast iron gear and preparation method thereof |
| CN106987762A (en) * | 2017-04-21 | 2017-07-28 | 龙邹 | A kind of cast-iron crankshaft and preparation method thereof |
| CN107012387A (en) * | 2017-04-20 | 2017-08-04 | 龙邹 | A kind of cast iron automobile shift fork and preparation method thereof |
| CN107090564A (en) * | 2017-04-21 | 2017-08-25 | 龙邹 | A kind of cast iron cam shaft and preparation method thereof |
| CN107090563A (en) * | 2017-04-20 | 2017-08-25 | 龙邹 | A kind of cast iron sprocket wheel and preparation method thereof |
| CN107090562A (en) * | 2017-04-20 | 2017-08-25 | 龙邹 | A kind of cast iron automobile axle and preparation method thereof |
| CN107557651A (en) * | 2017-09-07 | 2018-01-09 | 太湖县众瑞精密铸造有限公司 | A kind of agricultural colter |
| CN107557649A (en) * | 2017-09-07 | 2018-01-09 | 太湖县众瑞精密铸造有限公司 | Agriculture apparatus |
| CN107557650A (en) * | 2017-09-07 | 2018-01-09 | 太湖县众瑞精密铸造有限公司 | Agriculture apparatus and its production method |
| CN107557687A (en) * | 2017-09-07 | 2018-01-09 | 太湖县众瑞精密铸造有限公司 | A kind of agricultural colter and its production method |
| CN107630170A (en) * | 2017-09-07 | 2018-01-26 | 太湖县众瑞精密铸造有限公司 | A kind of axe and its production method with service life length |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102796940A (en) * | 2012-08-31 | 2012-11-28 | 丹阳市锦雄机械制造有限公司 | Preparation method of high-silicon heat-resistant ductile iron |
| CN103060662A (en) * | 2012-12-26 | 2013-04-24 | 宁波市瑞通新材料科技有限公司 | Preparation process of alloy cast iron grinding ball |
| CN106011360A (en) * | 2016-07-01 | 2016-10-12 | 宁国市开源电力耐磨材料有限公司 | Smelting technology of high-strength low-stress gray pig iron |
-
2016
- 2016-12-16 CN CN201611164629.5A patent/CN106521309A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102796940A (en) * | 2012-08-31 | 2012-11-28 | 丹阳市锦雄机械制造有限公司 | Preparation method of high-silicon heat-resistant ductile iron |
| CN103060662A (en) * | 2012-12-26 | 2013-04-24 | 宁波市瑞通新材料科技有限公司 | Preparation process of alloy cast iron grinding ball |
| CN106011360A (en) * | 2016-07-01 | 2016-10-12 | 宁国市开源电力耐磨材料有限公司 | Smelting technology of high-strength low-stress gray pig iron |
Non-Patent Citations (1)
| Title |
|---|
| 陆文华: "《铸铁及其熔炼》", 30 April 1981, 机械工业出版社 * |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107012387A (en) * | 2017-04-20 | 2017-08-04 | 龙邹 | A kind of cast iron automobile shift fork and preparation method thereof |
| CN107090563A (en) * | 2017-04-20 | 2017-08-25 | 龙邹 | A kind of cast iron sprocket wheel and preparation method thereof |
| CN107090562A (en) * | 2017-04-20 | 2017-08-25 | 龙邹 | A kind of cast iron automobile axle and preparation method thereof |
| CN106929749A (en) * | 2017-04-21 | 2017-07-07 | 龙邹 | A kind of cast iron gear and preparation method thereof |
| CN106987762A (en) * | 2017-04-21 | 2017-07-28 | 龙邹 | A kind of cast-iron crankshaft and preparation method thereof |
| CN107090564A (en) * | 2017-04-21 | 2017-08-25 | 龙邹 | A kind of cast iron cam shaft and preparation method thereof |
| CN107557651A (en) * | 2017-09-07 | 2018-01-09 | 太湖县众瑞精密铸造有限公司 | A kind of agricultural colter |
| CN107557649A (en) * | 2017-09-07 | 2018-01-09 | 太湖县众瑞精密铸造有限公司 | Agriculture apparatus |
| CN107557650A (en) * | 2017-09-07 | 2018-01-09 | 太湖县众瑞精密铸造有限公司 | Agriculture apparatus and its production method |
| CN107557687A (en) * | 2017-09-07 | 2018-01-09 | 太湖县众瑞精密铸造有限公司 | A kind of agricultural colter and its production method |
| CN107630170A (en) * | 2017-09-07 | 2018-01-26 | 太湖县众瑞精密铸造有限公司 | A kind of axe and its production method with service life length |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106521309A (en) | Heat resisting cast iron boiler furnace bar and preparation method thereof | |
| CN106521299A (en) | Heat treatment method for heat-resistant cast-iron boiler grate bar | |
| CN105063265B (en) | A kind of method that carburetting is carried out to No. 45 steel using low-sulfur molten iron | |
| CN101328522A (en) | Smelting production method of low activation martensitic steel for fusion reactor | |
| CN104862611B (en) | Cast material for casting wear-resisting centrifugal cylinder and casting technology thereof | |
| CN106801187A (en) | A kind of Cast iron liner and preparation method thereof | |
| CN103205605A (en) | High-temperature-oxidation-resistant casting nickel-based alloy and preparation method thereof | |
| CN103993244A (en) | Low-alloy cast steel joint as well as smelting and pouring control method and heat treatment process thereof | |
| CN103556040A (en) | Preparation method of nodular cast iron alloy | |
| CN106636867A (en) | Thermal treatment method of spheroidal graphite cast iron worm wheel | |
| CN106399814A (en) | Heat treatment method for phosphor-copper-titanium abrasion-resistant cast iron | |
| CN106566978A (en) | Boron containing wear-resisting cast iron and preparation method thereof | |
| CN104561447A (en) | Dual-refining-casting process for hydroturbine guide vane | |
| CN106636868A (en) | Cast iron machine tool body and preparation method thereof | |
| CN106521305A (en) | Wear-resistant chrome-molybdenum cast iron and preparation method thereof | |
| CN106521306A (en) | Heat treatment method for Cr-Mo wear-resistant cast iron | |
| CN106435126A (en) | Heat treatment method of vanadium-titanium wear-resistant cast iron | |
| CN106435350A (en) | Phosphor copper titanium wear resistant cast iron and preparation method thereof | |
| CN106521304A (en) | Heat treatment method for chromium molybdenum copper wear resisting cast iron | |
| CN106367676A (en) | Vanadium-titanium wear resistant cast iron and preparation method thereof | |
| CN106521303A (en) | Thermal treatment method for chromium-containing wear resisting cast iron | |
| CN106702256A (en) | Ductile cast iron worm wheel and preparation method thereof | |
| CN105441784A (en) | Ultrahigh chromium alloy wear-resisting cast iron guide plate material and preparation method thereof | |
| CN106399810A (en) | Heat treatment method for boracic wear resisting cast iron | |
| CN106801186A (en) | A kind of alkali resistant cast iron condenser and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170322 |