CN102732775B - Smelting additive specially used for cast balls and wear-resistant cast iron - Google Patents
Smelting additive specially used for cast balls and wear-resistant cast iron Download PDFInfo
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- CN102732775B CN102732775B CN201110287021.2A CN201110287021A CN102732775B CN 102732775 B CN102732775 B CN 102732775B CN 201110287021 A CN201110287021 A CN 201110287021A CN 102732775 B CN102732775 B CN 102732775B
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- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
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Abstract
The invention provides a smelting additive specially used for cast balls and wear-resistant cast iron. The additive is characterized by comprising, by weight percent, 10 to 50% of titanium, no more than 0.5% of vanadium, no more than 4% of boron, no more than 5% of carbon and no more than 1% of rare earth, with the balance being aluminum. A preparation method for the additive comprises the following steps: according to above-mentioned proportions, fusing aluminum which is used as a carrier in a vacuum furnace at first; then respectively adding titanium and vanadium into the vacuum furnace in order; then successively adding boron, carbon and rare earth after titanium and vanadium are melted, and when smelting is finished after 5 min, metal liquid is poured into a centrifuge to prepare granules. After application of the additive provided in the invention, cast balls are enabled to have the characteristics of obviously improved comprehensive mechanical performance and a prolonged service life; resources are saved, cost for cast balls is reduced, more than 80% of ferrochrome is saved in production of each ton of cast balls, the procedure of heat treatment is omitted, and more than 300 degrees of power are saved in production of each ton of cast balls.
Description
Technical field
The present invention relates to a kind of smelt additive, particularly relate to a kind of cast ball cast ball and special-purpose smelt additive (hereinafter to be referred as superpower dose of metal) of antifriction cast iron for increasing hardness, intensity, toughness when smelting, belong to black metal smelting technology field.
Background technology
At present, domestic and international existing cast ball mainly be take various alloying elements such as adding chromium, molybdenum, copper as main in smelting.Its shortcoming is: the one, add a large amount of alloying element waste resources, and cost is high; The 2nd, existing cast ball must be heat-treated after casting, and the time-consuming electricity that takes increases cost.
Publication number is that CN 1107186 Chinese invention patent applications have provided a kind of < < stabilization additives for high-carbon equivalent high-strength gray cast iron > >, take natural titanium ore as main, allocate appropriate silicon, manganese, chromium element into, make graphitic cast iron can under carbon equivalent high condition, obtain higher intensity, the castability of simultaneously getting back.
Publication number is that CN 1718820 Chinese invention patent applications have provided a kind of < < alterant > >, its composition (weight percent) is: rare earth ferrosilicon 45～60%, ferrosilicon 15～25%, silicocalcium 10～20%, trace element 5～10%, the weight percent composition of described trace element is: aluminium 10～20%, antimony 20～30%, bismuth 20～30%, titanium 20～30%.This alterant is remarkably productive to the carbide refinement in cast iron, can make the hypoeutectic pig iron of carbon containing 2～3% after rotten processing and annealing, softens to and can roll.
Publication number is the compounded agent > > that CN 1135535 Chinese invention patent applications have provided a < < Cast Iron Melts smelting use, it is characterized in that it is to take industrial silicon carbide as base-material, allocate commercial-purity aluminium into, alkene soil magnesium ferrosilicon, ferrosilicon, ferromanganese and binding agent combine.It plays and in fusion process, increases silicon, temperature raising, and purifying molten iron, reduces silicon, manganese scaling loss, is conducive to reduce strand subsurface defect, improves cast iron microstructure, thereby improves the effect of cast iron over-all properties.
The additive of smelting for cast ball that technique scheme provides can play the effect that improves cast iron over-all properties to a certain extent, but also exist, cannot meet the problem that the cast ball smelting process for production of development requires.
Summary of the invention
Object of the present invention is just to overcome prior art above shortcomings, and a kind of superpower dose of metal that is easy to preparation is provided.Superpower dose of this metal that the present invention provides is to synthesize acquisition by vacuum metling, is added the comprehensive mechanical performance that can effectively improve cast ball in iron liquid, thereby improves cast ball work-ing life.
The technical solution that the present invention provides is: the feature that this metal is superpower dose is comprised of titanium, vanadium, boron, carbon, rare earth and aluminium, and the % by weight content of its component is: titanium is 10-50%, and vanadium is≤0.5%, boron is≤4%, carbon is≤5%, and rare earth is≤1%, and surplus is aluminium.
Object to better implement the present invention, the % by weight content of superpower dose of better component of described metal is: titanium=15%, vanadium=0.2%, boron=1%, carbon=2%, rare earth=0.5%, aluminium=81.3%.
Object to better implement the present invention, the % by weight content of superpower dose of better component of described metal is: titanium=25%, vanadium=0.3%, boron=2%, carbon=3%, rare earth=0.8%, aluminium=68.9%.
Object to better implement the present invention, the % by weight content of superpower dose of better component of described metal is: titanium=35%, vanadium=0.5%, boron=2.5%, carbon=4%, rare earth=1%, aluminium=57%.
Each component of the special-purpose smelt additive of this cast ball that the present invention provides and antifriction cast iron all can be by buying on market, wherein titanium is titanium sponge (titaniferous 99.7%), vanadium is vanadium iron (containing vanadium 50%), boron is boron trioxide (content is 98%), carbon is carburelant (carbon containing is 99.7%), rare earth is rare earth magnesium (containing rare earth 7---8Re6.86Mg8.15), aluminium is that aluminium ingot AL001(is 99.7% containing aluminium).
The preparation method that this metal that the present invention provides is superpower dose is: the first step, take aluminium as carrier, and first added in vacuum oven and melted; Then respectively titanium, vanadium are added in vacuum oven sequentially; After melting, be sequentially added into again boron, carbon, rare earth.After 5 minutes, the smelting process that metal is superpower dose finishes.
Second step, pours the liquid of superpower dose of metal into whizzer granulation.
Using method is: during cast ball, can add in iron liquid by 0.2%-2%, within before coming out of the stove 5 to 10 minutes, add in intermediate frequency furnace.
Compared with prior art, its beneficial effect is in the present invention: 1, cast ball comprehensive mechanical performance obviously improves, and has extended cast ball work-ing life.
2, economize on resources cast ball cost is declined, cast ball per ton is saved ferrochrome more than 80%.
3, reduce heat treatment step, more than cast ball economize on electricity 300 degree per ton.
4, simple to operate.
Embodiment
Below in conjunction with specific examples, technical scheme of the present invention is described in detail: table 1 is listed is the requirement to low chromium cast ball ZQCrDB in national sector standard when and high chromium casting ball ZQGB of three kinds of cast ball chemical compositions (formula) that add superpower dose of metal and measuring result (performance).
Embodiment 1: each composition weight % content that metal is superpower dose is: titanium=15%, vanadium=0.2%, boron=1%, carbon=2%, rare earth=0.5%, aluminium=81.3%.
During preparation, according to the aforementioned proportion of each component, prepare material, first take aluminium as carrier, first added in vacuum oven and melt; Then respectively titanium, vanadium are added in vacuum oven sequentially; After melting, be sequentially added into again boron, carbon, rare earth.After 5 minutes, the smelting process of the special-purpose smelt additive of cast ball and antifriction cast iron finishes.
Pour the liquid of superpower dose of metal into whizzer granulation again.
Using method is: during cast ball, by 0.2% of iron liquid gross weight in intermediate frequency furnace, add superpower dose of particle of metal, come out of the stove and add in intermediate frequency furnace first 5 minutes time.
The experimental result (performance) of the cast ball one after making is in Table 1.
Embodiment 2: each composition weight % content that metal is superpower dose is: titanium=25%, vanadium=0.3%, boron=2%, carbon=3%, rare earth=0.8%, aluminium=68.9%.
During preparation, according to the aforementioned proportion of each component, prepare material, first take aluminium as carrier, first added in vacuum oven and melt; Then respectively titanium, vanadium are added in vacuum oven sequentially; After melting, be sequentially added into again boron, carbon, rare earth.After 5 minutes, the smelting process that metal is superpower dose finishes.
Pour the liquid of superpower dose of metal into whizzer granulation again.
Using method is: during cast ball, by 0.4% of iron liquid gross weight in intermediate frequency furnace, add superpower dose of particle of metal, come out of the stove and add in intermediate frequency furnace first 5 minutes time.
The experimental result (performance) of the cast ball two after making is in Table 1.
Embodiment 3: each composition weight % content that metal is superpower dose is: titanium=35%, vanadium=0.5%, boron=2.5%, carbon=4%, rare earth=1%, aluminium=57%.
During preparation, according to the aforementioned proportion of each component, prepare material, first take aluminium as carrier, first added in vacuum oven and melt; Then respectively titanium, vanadium are added in vacuum oven sequentially; After melting, be sequentially added into again boron, carbon, rare earth.After 5 minutes, the smelting process that metal is superpower dose finishes.
Pour the liquid of superpower dose of metal into whizzer granulation again.
Using method is: during cast ball, by 0.6% of iron liquid gross weight in intermediate frequency furnace, add superpower dose of particle of metal, come out of the stove and add in intermediate frequency furnace first 5 minutes time.
The experimental result (performance) of the cast ball three after making is in Table 1.
In sum, added respectively superpower dose of particle of metal of Different Weight % in above three kinds of cast balls, made to compare with industry standard high chromium casting ball, chrome content obviously reduces more than 80%; Save a large amount of chromium, molybdenum, copper metallic substance, also saved thermal treatment expense simultaneously.Moreover, and the every experimental result recording all meet national sector standard.Compare with the low chromium cast ball in industry standard, the indexs such as its hardness, the interior heterodyne of hardness, broken rate of grinding ball, toughness are all obviously better than low chromium cast ball.
Table one (φ 80 cast balls):
Note: 1, industry standard refers to JC/T533-94.
2, M is martensite, and C is carbide.
3, additive refers to the special-purpose smelt additive particle of antifriction cast iron.
Claims (5)
1. the special-purpose smelt additive of cast ball and antifriction cast iron, is characterized in that being comprised of titanium, vanadium, boron, carbon, rare earth and aluminium, and the % by weight content of its component is:
Titanium is 15-35%, and vanadium is 0.2-0.5%, and boron is 1-2.5%, and carbon is 2-4%, and rare earth is 0.5-1%,
Surplus is aluminium.
2. the special-purpose smelt additive of cast ball and antifriction cast iron according to claim 1, is characterized in that the % by weight content of the better component of the special-purpose smelt additive of described cast ball and antifriction cast iron is: titanium=15%, vanadium=0.2%, boron=1%, carbon=2%, rare earth=0.5%, aluminium=81.3%.
3. the special-purpose smelt additive of cast ball and antifriction cast iron according to claim 1, is characterized in that the % by weight content of the better component of the special-purpose smelt additive of described cast ball and antifriction cast iron is: titanium=25%, vanadium=0.3%, boron=2%, carbon=3%, rare earth=0.8%, aluminium=68.9%.
4. the special-purpose smelt additive of cast ball and antifriction cast iron according to claim 1, is characterized in that the % by weight content of the better component of the special-purpose smelt additive of described cast ball and antifriction cast iron is: titanium=35%, vanadium=0.5%, boron=2.5%, carbon=4%, rare earth=1%, aluminium=57%.
5. the preparation method of the special-purpose smelt additive of cast ball and antifriction cast iron described in claim 1, is characterized in that there are following steps:
The first step, take aluminium as carrier, is first added in vacuum oven and melts, then respectively titanium, vanadium are added in vacuum oven sequentially, after melting, be sequentially added into boron, carbon, rare earth, after 5 minutes, the smelting process of the special-purpose smelt additive of cast ball and antifriction cast iron finishes again;
Second step, pours the liquid of cast ball and the special-purpose smelt additive of antifriction cast iron into whizzer granulation shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201110287021.2A CN102732775B (en) | 2011-09-26 | 2011-09-26 | Smelting additive specially used for cast balls and wear-resistant cast iron |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110287021.2A CN102732775B (en) | 2011-09-26 | 2011-09-26 | Smelting additive specially used for cast balls and wear-resistant cast iron |
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| CN102732775A CN102732775A (en) | 2012-10-17 |
| CN102732775B true CN102732775B (en) | 2014-03-26 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1100150A (en) * | 1993-09-09 | 1995-03-15 | 株洲市机械工业研究所 | Impact fatigue-resistant wear-proof alloy cast iron |
| CN1636075A (en) * | 2002-01-09 | 2005-07-06 | 罗曼·拉顿 | High chromium-nitrogen bearing castable alloy |
| CN1718822A (en) * | 2005-08-09 | 2006-01-11 | 赣州龙钇稀土材料有限公司 | Yttrium base heavy rare earth wear resistant alloy cast iron alterant |
| CN101358308A (en) * | 2008-09-19 | 2009-02-04 | 山东大学 | Aluminium-titan-carbon-boron-nitrogen intermediate alloy and preparation method thereof |
| CN101591740A (en) * | 2009-06-22 | 2009-12-02 | 济南大学 | A kind of preparation method of Al-Ti-B-C master alloy fining agent |
-
2011
- 2011-09-26 CN CN201110287021.2A patent/CN102732775B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1100150A (en) * | 1993-09-09 | 1995-03-15 | 株洲市机械工业研究所 | Impact fatigue-resistant wear-proof alloy cast iron |
| CN1636075A (en) * | 2002-01-09 | 2005-07-06 | 罗曼·拉顿 | High chromium-nitrogen bearing castable alloy |
| CN1718822A (en) * | 2005-08-09 | 2006-01-11 | 赣州龙钇稀土材料有限公司 | Yttrium base heavy rare earth wear resistant alloy cast iron alterant |
| CN101358308A (en) * | 2008-09-19 | 2009-02-04 | 山东大学 | Aluminium-titan-carbon-boron-nitrogen intermediate alloy and preparation method thereof |
| CN101591740A (en) * | 2009-06-22 | 2009-12-02 | 济南大学 | A kind of preparation method of Al-Ti-B-C master alloy fining agent |
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