CN103757519A - Boron-containing high-hardness low-chromium multi-element alloy casting ball material and preparation method thereof - Google Patents
Boron-containing high-hardness low-chromium multi-element alloy casting ball material and preparation method thereof Download PDFInfo
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- CN103757519A CN103757519A CN201310677486.8A CN201310677486A CN103757519A CN 103757519 A CN103757519 A CN 103757519A CN 201310677486 A CN201310677486 A CN 201310677486A CN 103757519 A CN103757519 A CN 103757519A
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Abstract
The invention relates to a boron-containing high-hardness low-chromium multi-element alloy casting ball material, which contains the following chemical element components by mass: 2.2-2.5% of carbon, 0.9-1.2% of silicon, 1.4-1.7% of manganese, 0.07-0.09% of copper, 2.5-2.7% of chromium, 0.17-0.19% of niobium, 0.5-0.6% of boron, 0.06-0.09% of Zr, less than or equal to 0.07% of P, less than or equal to 0.07% of S, and the balance of iron. According to the present invention, boron, Zr, niobium, copper and other elements are added, and the treatment temperature after casting is reasonably controlled, such that the hardness, the wear resistance, the high temperature strength, the acid corrosion resistance, the alkali corrosion resistance and the air corrosion resistance of the alloy are increased, and the core hardness and the surface hardness of the alloy are basically the same; the scrap iron is adopted as the raw material, such that the alloy quality is uniform, and cracks are not easily generated; the material has characteristics of good impact toughness, low ball breaking rate and operation cost reduction; and the refining agent is used for casting production, wherein the porosity in the cast can be reduced by 1-2 DEG, the oxidation inclusion is at about grade 2, and the yield is significantly improved.
Description
Technical field
The present invention relates to cast grinding ball Material Field, relate in particular to a kind of boracic high rigidity Low chrome multielement alloy cast ball material and preparation method thereof.
Background technology
In prior art, cast grinding ball is widely used in the industries such as cement building material, pottery, mine smelting choosing, power plant's coal-grinding, aluminum oxide.Require abrading-ball have high, the resistance to grinding of hardness, not broken, do not lose circle, the high good physical and mechanical properties of grinding machine overall efficiency.The kind of abrading-ball mainly contains middle manganese nodular cast iron abrading-ball, low carbon white cast iron abrading-ball at present, and HI-chrome cast iron for grinding balls etc.HI-chrome cast iron for grinding balls excellent property, surface hardness and volume hardness are higher, but impelling strength is lower, and along with the price of chromium is high, the price Ye Yi road of HI-chrome cast iron for grinding balls is high; The surface hardness of low Cr grinding balls and volume hardness are lower, and work-ing life is short; Middle manganese nodular cast iron abrading-ball is not corrosion-resistant, and original hardness is low, easily broken.As can be seen here, also there are a lot of deficiencies in prior art, need to be according to condition of production difference, and research has high rigidity, high impact toughness, low percentage of damage, low abrasion and the high abrading-ball of cost performance cheaply concurrently.
Summary of the invention
The object of the present invention is to provide a kind of boracic high rigidity Low chrome multielement alloy cast ball material and preparation method thereof, this grinding ball material has advantages of that hardness is high, wear resistance good, hot strength is high and acid and alkali-resistance and air corrosion.
Technical scheme of the present invention is as follows:
A kind of boracic high rigidity Low chrome multielement alloy cast ball material, is characterized in that: chemical element composition and mass percent thereof that it contains are: carbon 2.2-2.5, silicon 0.9-1.2, manganese 1.4-1.7, copper 0.07-0.09, chromium 2.5-2.7, niobium 0.17-0.19, boron 0.5-0.6, Zr0.06-0.09, P≤0.07, S≤0.07, surplus are iron.
The production method of described boracic high rigidity Low chrome multielement alloy cast ball material, is characterized in that:
(1), preparing the pig iron and scrap iron originates as ferrous substrate in 1:1-2 ratio, the pig iron is added to drop in stove and melt, carry out desulfurization, deoxidation, employing refining agent initial refining, add alloying constituent and carry out alloying, then add scrap iron fusing, add refining agent secondary refining, detection and adjust chemical element component content to qualified, casting, casting postheat treatment etc.;
(2) in alloying process, to the lot sequence that drops into alloying element in stove, be: (1) silicon, copper, Zr; (2) manganese, niobium; (3) other remaining components; The each batch of timed interval of dropping into element is 21-25 minute, after feeding intake, stirs.
Described casting postheat treatment is: first by room temperature, with 180-200 ℃/h of speed, be warming up to 730-740 ℃, then be cooled to 600-610 ℃ with 150-160 ℃/h of speed, then be warming up to 920-940 ℃ with 140-150 ℃/h of speed, insulation 3-4 hour; With 150-160 ℃/h of speed, be cooled to 500-510 ℃ again, insulation 40-50 minute, then with 150-160 ℃/h of speed, be cooled to 230-250 ℃, insulation 2-3 hour; With 80-90 ℃/h of speed, be warming up to 350-360 ℃ again, insulation 50-60 minute, then be warming up to 520-530 ℃ with 80-90 ℃/h of speed, insulation 2-3 hour, takes out air cooling and get final product.
Described refining agent is made by the raw material of following weight part: instrument comminuted steel shot 12-15, silicon-dioxide 4-5, rhombspar 3-5, Na
2tiF
68-10, vinyltriethoxysilane 2-3, nano-aluminium oxide 1-2, bitter water chestnut soil 4-8, clay 30-35, Sodium Silicofluoride 3-4, titanium dioxide 2-3, fluorite 6-8, jade powder 3-4, montmorillonite 1-2; Its preparation method clay is put into calcining furnace and calcine 3-4 hour at 1200-1240 ℃, takes out and pulverizes, and adds in the aqueous hydrochloric acid of 12-15% and soaks 1-2 hour, filter, with clear water washing, dry again, become powder with vinyltriethoxysilane mixing, grinding distribution; Other remaining component is mixed, is heated to 1600-2300 ℃, stirs after 45-60 minute, pour in cold water, cooling after, with clear water washing, filter, oven dry, be ground into 100-150 order powder, mix with the powder of aforementioned gained, obtain.
Beneficial effect of the present invention
Alloy of the present invention, by adding the elements such as boron, Zr, niobium, copper, is rationally controlled casting post-processing temperature, has increased hardness, wear resistance, hot strength and acid and alkali-resistance and the air corrosion of alloy, and core hardness and surface hardness are basically identical; By using scrap iron as raw material, make alloy quality homogeneous, be difficult for cracking; Impelling strength of the present invention is good, and chip index is low, has reduced running cost.Refining agent of the present invention, for Foundry Production, can make the degree of porosity in foundry goods reduce 1-2 degree, and oxide inclusion, 2 grades of left and right, obviously improves yield rate.
Embodiment
A kind of boracic high rigidity Low chrome multielement alloy cast ball material, chemical element composition and mass percent thereof that it contains are: carbon 2.2-2.5, silicon 0.9-1.2, manganese 1.4-1.7, copper 0.07-0.09, chromium 2.5-2.7, niobium 0.17-0.19, boron 0.5-0.6, Zr0.06-0.09, P≤0.07, S≤0.07, surplus are iron.
The production method of described boracic high rigidity Low chrome multielement alloy cast ball material is as follows:
(1), preparing the pig iron and scrap iron originates as ferrous substrate in 1:1.5 ratio, the pig iron is added to drop in stove and melt, carry out desulfurization, deoxidation, employing refining agent initial refining, add alloying constituent and carry out alloying, then add scrap iron fusing, add refining agent secondary refining, detection and adjust chemical element component content to qualified, casting, casting postheat treatment etc.;
(2) in alloying process, to the lot sequence that drops into alloying element in stove, be: (1) silicon, copper, Zr; (2) manganese, niobium; (3) other remaining components; The each batch of timed interval of dropping into element is 23 minutes, after feeding intake, stirs.
Described casting postheat treatment is: first by room temperature, with 190 ℃/h of speed, be warming up to 735 ℃, then be cooled to 605 ℃ with 155 ℃/h of speed, then be warming up to 930 ℃ with 145 ℃/h of speed, be incubated 3.5 hours; With 155 ℃/h of speed, be cooled to 505 ℃ again, be incubated 45 minutes, then be cooled to 240 ℃ with 155 ℃/h of speed, be incubated 2.5 hours; With 85 ℃/h of speed, be warming up to 355 ℃ again, be incubated 55 minutes, then be warming up to 525 ℃ with 85 ℃/h of speed, be incubated 2.5 hours, take out air cooling and get final product.
Described refining agent by following weight part (kilogram) raw material make: instrument comminuted steel shot 12, silicon-dioxide 5, rhombspar 3, Na
2tiF
68, vinyltriethoxysilane 2, nano-aluminium oxide 2, bitter water chestnut soil 4, clay 30, Sodium Silicofluoride 3, titanium dioxide 2, fluorite 8, jade powder 4, montmorillonite 1; Its preparation method clay is put into calcining furnace and calcine 3-4 hour at 1200-1240 ℃, takes out and pulverizes, and adds in the aqueous hydrochloric acid of 12-15% and soaks 1-2 hour, filter, with clear water washing, dry again, become powder with vinyltriethoxysilane mixing, grinding distribution; Other remaining component is mixed, is heated to 1600-2300 ℃, stirs after 45-60 minute, pour in cold water, cooling after, with clear water washing, filter, oven dry, be ground into 100-150 order powder, mix with the powder of aforementioned gained, obtain.
The mechanical property of boracic high rigidity Low chrome multielement alloy cast ball material of the present invention is: impelling strength (J/CM
2)>=2.7, hardness (HRC)>=56, ball impact fatigue lifetime (inferior)>=13500, percentage of damage (%)≤0.4, ball consumption (G/ ton ore deposit)≤115.
Claims (4)
1. a boracic high rigidity Low chrome multielement alloy cast ball material, is characterized in that: chemical element composition and mass percent thereof that it contains are: carbon 2.2-2.5, silicon 0.9-1.2, manganese 1.4-1.7, copper 0.07-0.09, chromium 2.5-2.7, niobium 0.17-0.19, boron 0.5-0.6, Zr0.06-0.09, P≤0.07, S≤0.07, surplus are iron.
2. the production method of boracic high rigidity Low chrome multielement alloy cast ball material according to claim 1, is characterized in that:
(1), preparing the pig iron and scrap iron originates as ferrous substrate in 1:1-2 ratio, the pig iron is added to drop in stove and melt, carry out desulfurization, deoxidation, employing refining agent initial refining, add alloying constituent and carry out alloying, then add scrap iron fusing, add refining agent secondary refining, detection and adjust chemical element component content to qualified, casting, casting postheat treatment etc.;
(2) in alloying process, to the lot sequence that drops into alloying element in stove, be: (1) silicon, copper, Zr; (2) manganese, niobium; (3) other remaining components; The each batch of timed interval of dropping into element is 21-25 minute, after feeding intake, stirs.
3. the production method of boracic high rigidity Low chrome multielement alloy cast ball material according to claim 2, it is characterized in that: described casting postheat treatment is: first by room temperature, with 180-200 ℃/h of speed, be warming up to 730-740 ℃, with 150-160 ℃/h of speed, be cooled to 600-610 ℃ again, with 140-150 ℃/h of speed, be warming up to 920-940 ℃ again, insulation 3-4 hour; With 150-160 ℃/h of speed, be cooled to 500-510 ℃ again, insulation 40-50 minute, then with 150-160 ℃/h of speed, be cooled to 230-250 ℃, insulation 2-3 hour; With 80-90 ℃/h of speed, be warming up to 350-360 ℃ again, insulation 50-60 minute, then be warming up to 520-530 ℃ with 80-90 ℃/h of speed, insulation 2-3 hour, takes out air cooling and get final product.
4. the production method of boracic high rigidity Low chrome multielement alloy cast ball material according to claim 2, is characterized in that: described refining agent is made by the raw material of following weight part: instrument comminuted steel shot 12-15, silicon-dioxide 4-5, rhombspar 3-5, Na
2tiF
68-10, vinyltriethoxysilane 2-3, nano-aluminium oxide 1-2, bitter water chestnut soil 4-8, clay 30-35, Sodium Silicofluoride 3-4, titanium dioxide 2-3, fluorite 6-8, jade powder 3-4, montmorillonite 1-2; Its preparation method clay is put into calcining furnace and calcine 3-4 hour at 1200-1240 ℃, takes out and pulverizes, and adds in the aqueous hydrochloric acid of 12-15% and soaks 1-2 hour, filter, with clear water washing, dry again, become powder with vinyltriethoxysilane mixing, grinding distribution; Other remaining component is mixed, is heated to 1600-2300 ℃, stirs after 45-60 minute, pour in cold water, cooling after, with clear water washing, filter, oven dry, be ground into 100-150 order powder, mix with the powder of aforementioned gained, obtain.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104032169A (en) * | 2014-05-12 | 2014-09-10 | 蚌埠市宏威滤清器有限公司 | Cerium-containing leadless free-cutting zinc-copper-nickel alloy material and preparation method thereof |
| CN104032165A (en) * | 2014-05-12 | 2014-09-10 | 蚌埠市宏威滤清器有限公司 | Antifouling sweater-corrosion-resistant copper alloy material and preparation method thereof |
| CN104152813A (en) * | 2014-07-14 | 2014-11-19 | 安徽省三方耐磨股份有限公司 | Low-chromium multicomponent alloy casting ball |
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| JPH0353042A (en) * | 1989-07-20 | 1991-03-07 | Sumitomo Metal Ind Ltd | Roll for rolling |
| JP2005290549A (en) * | 2004-03-08 | 2005-10-20 | Komatsu Ltd | Ferrous seal sliding part and production method thereof |
| RU2306356C1 (en) * | 2006-07-11 | 2007-09-20 | Юлия Алексеевна Щепочкина | Cast iron |
| CN101775558A (en) * | 2010-02-05 | 2010-07-14 | 北京工业大学 | Fe-Cr-B cast abrasion-resistant alloy and manufacturing method thereof |
| CN102876961A (en) * | 2012-08-31 | 2013-01-16 | 宁国市金六星研磨材料科技有限公司 | Novel ultralow-manganese and high-chromium wear-resistant and corrosion-resistant cast grinding ball |
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2013
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Patent Citations (5)
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|---|---|---|---|---|
| JPH0353042A (en) * | 1989-07-20 | 1991-03-07 | Sumitomo Metal Ind Ltd | Roll for rolling |
| JP2005290549A (en) * | 2004-03-08 | 2005-10-20 | Komatsu Ltd | Ferrous seal sliding part and production method thereof |
| RU2306356C1 (en) * | 2006-07-11 | 2007-09-20 | Юлия Алексеевна Щепочкина | Cast iron |
| CN101775558A (en) * | 2010-02-05 | 2010-07-14 | 北京工业大学 | Fe-Cr-B cast abrasion-resistant alloy and manufacturing method thereof |
| CN102876961A (en) * | 2012-08-31 | 2013-01-16 | 宁国市金六星研磨材料科技有限公司 | Novel ultralow-manganese and high-chromium wear-resistant and corrosion-resistant cast grinding ball |
Non-Patent Citations (1)
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| 周家荣: "《铝合金熔铸生产技术问答》", 31 January 2008 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104032169A (en) * | 2014-05-12 | 2014-09-10 | 蚌埠市宏威滤清器有限公司 | Cerium-containing leadless free-cutting zinc-copper-nickel alloy material and preparation method thereof |
| CN104032165A (en) * | 2014-05-12 | 2014-09-10 | 蚌埠市宏威滤清器有限公司 | Antifouling sweater-corrosion-resistant copper alloy material and preparation method thereof |
| CN104032165B (en) * | 2014-05-12 | 2016-05-25 | 蚌埠市宏威滤清器有限公司 | A kind of antifouling and seawater corrosion resistance Cu alloy material and preparation method thereof |
| CN104032169B (en) * | 2014-05-12 | 2016-10-05 | 蚌埠市宏威滤清器有限公司 | A kind of containing cerium lead-free easy-to-cut zinc-white copper alloy material and preparation method thereof |
| CN104152813A (en) * | 2014-07-14 | 2014-11-19 | 安徽省三方耐磨股份有限公司 | Low-chromium multicomponent alloy casting ball |
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Application publication date: 20140430 |