CN1439739A - Wear resistant steel ball production process - Google Patents
Wear resistant steel ball production process Download PDFInfo
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- CN1439739A CN1439739A CN 03108590 CN03108590A CN1439739A CN 1439739 A CN1439739 A CN 1439739A CN 03108590 CN03108590 CN 03108590 CN 03108590 A CN03108590 A CN 03108590A CN 1439739 A CN1439739 A CN 1439739A
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Abstract
A process for preparing the antiwear steel ball includes such steps as loading burden and two kinds of slags in a crucible with acidic liner, adding waste steel, smelting while regulating its components: C (0.60-0.95), Si (0.2-0.65), Mn (0.6-1.6), S (0-0.045) and P (0-0.045), skimming for final deoxidizing, casting with quartz sand or river sand mould, quenching in mechanical oil, tempering at 200-240 deg.C, and holding the temp for 4 hr or more. Its advantages are high antiwear performance, low cost and long service life.
Description
Technical field the present invention relates to a kind of production technique of steel ball, relates to a kind of production technique of abrasion-proof steel ball specifically.
Background technology is present, sector applications such as metal mine, cement, power system the most widely abrasion-proof steel ball adopt the spheroidal graphite cast iron of chromium alloy white cast iron, martensite, shellfish body matrix difficult to understand mostly, as low chromium white cast iron ball, high chromium casting ball, ductile iron grinding ball etc.The casting iron craft great majority that adopted are still hand moulding, greensand casting, and minority producer adopts die cast.Low chromium white cast iron ball, high-chromium cast-iron ball ubiquity shortcomings such as cost is higher, chip index height.The spheroidal graphite cast iron of martensite, shellfish body matrix difficult to understand is low work-ing life, and shortcoming such as wear no resistance.
Summary of the invention the object of the present invention is to provide the production technique of a kind of long service life, wear resistance height, abrasion-proof steel ball that chip index is low.
The objective of the invention is to be achieved through the following technical solutions:
A kind of production method of abrasion-proof steel ball adopts quartz sand, river sand molding, it is characterized in that: acidic liner, and double slag process is promptly moltenly made new slag after clear, carries out final deoxygenation and inserts the aluminium method; At the crucible bottom furnace charge of packing into, slag charge accounts for the 1%-1.5% of furnace charge, add remaining steel scrap, after melting clearly, draw a design and carry out total analysis, after result to be analyzed quotes, adjust composition, to make its C content be 0.60-0.95, si content 0.2-0.65, contain Mn amount 0.6-1.6, contain S and P amount≤0.045, skims and carry out final deoxygenation, tapping when tapping temperature is controlled at 1500-1550 ℃; The steel ball of having cast is removed the surplus sand on the foundry goods through insulation, hands over inspection after the reconditioning, and heat-treats; Quench treatment is at first carried out in thermal treatment, and temperature is between 820-880 ℃, and diameter is steel ball constant temperature 2-3 hour of 40-60mm, and diameter carries out quench treatment the steel ball constant temperature of 70-100mm 3-4 hour in useless machinery oil; Carry out temper after the quenching again, temperature is incubated more than 4 hours in the time of 200-240 ℃.
Said moulding process is: facing sand adopts 40-70 purpose synthetic quartz sand, and the silicon content of quartz sand is not less than 90%, and floor sand adopts river sand, and quartz sand is 80-100 part, wilkinite 2-6 part, water 4-8 part, and the mulling time can not be lower than 8 minutes; The sandbox template is put well back dress sand, cover template and model 15-40 millimeter, sand is fixed, refill the sand 10-30 millimeter case of can pounding, refill sand at last one time, exceed sandbox 30-50 millimeter, with the plane reality of pounding, and wipe off with scraper plate, prick the core hole of 2-8 millimeter, template is tripped out after playing top box; Template trips out and mends case, detains case then.
Molding sand adopts the dried quartz sand of 20-40 order in the said moulding process, dioxide-containing silica is greater than 92%, adopt one dimension shaking table vibration molding, insert the sand of some amount in sandbox, vibration is wipeed off and is formed the casting bed of placing the EPS model, casting bed thickness will be decided on the foundry goods size, by processing requirement the EPS model is placed on the casting bed in the sandbox, carries out the model assembling, and training sand is fixed by the casting technique requirement, after model fixes, add sand, sandbox is placed on carries out vibration ramming on the shaking table, the sandbox surface will seal with plastics film, open vacuum pump, form negative pressure.
To make its composition be adjusted into C content after said smelting technology is molten clear be 0.60-0.95, si content 0.2-0.65, contain Mn amount 1.0-1.6, contain S and P amount≤0.045.
To make its composition be adjusted into C content after said smelting technology is molten clear be 0.60-0.90, si content 0.2-0.60, contain Mn amount 0.6-1.5, contain Cr amount 0.3-1.5, contain S and P amount≤0.045.
To make its composition be adjusted into C content after said smelting technology is molten clear be 0.75-0.85, si content 0.2-0.45, contain Mn amount 1.0-1.25, contain S and P amount≤0.045.
If when the steel ball of producing with present method requires impelling strength high, can carry out normalizing treatment, temperature is between 820-850 ℃, and diameter is steel ball constant temperature 2-3 hour of 40-60mm, and diameter is steel ball constant temperature 2-4 hour of 70-100mm.
Advantage of the present invention is: produce steel ball with the present invention and belong to the oil quenching type, the metallographic structure after the thermal treatment is a tempered martensite, dense structure after the abrading-ball thermal treatment, and crystal grain is fine and closely woven, and thermal treatment rear surface hardness remains on HRC greater than 50, and impelling strength is greater than 5J/cm
2Produce steel ball with the present invention, can improve the work-ing life of steel ball, the wear resistance height reduces cost, and reduces chip index.
Embodiment embodiment 1: a kind of production method of abrasion-proof steel ball, facing sand adopts 40-70 purpose synthetic quartz sand, and the silicon content of quartz sand is not less than 90%, and floor sand adopts river sand, quartz sand is 100 parts, wilkinite 7-8 part, water 4-5 part, and the mulling time can not be lower than 8 minutes; The sandbox template is put well back dress sand, cover 30 millimeters on template and model, sand is fixed, refill 20 millimeters in the sand case of can pounding, every case pounds twice with tip, and first pass will gently be pounded with tip, protect model, when second time sand adorned flat sandbox, i.e. desired strength height, permeability is good, also otherwise pound model, refill sand at last one time, exceed 40 millimeters in sandbox, with the plane reality of pounding, and wipe off with scraper plate; Prick the core hole of 4-6 millimeter; After case was pounded, earlier from four direction activity top box case handle once, activity was not more than 1 millimeter, can play top box, and a movable again lower bolster is no more than 1 millimeter equally, and template is tripped out; After template trips out, the scrutiny die cavity, the place that scratches when finding active sand and withdrawing pattern will be with pressing spoon to mend flat real the mending of mending, drop in the time of preventing to detain case, mended case after, clean floating sand blast, detain case then; Acidic liner, double slag process is made new slag after promptly molten clear, carries out final deoxygenation and inserts the aluminium method; Little in crucible bottom some lumpiness of packing into, the furnace charge of consolidation, add in succession by its requirement, slag charge accounts for 1.5% of furnace charge, adds remaining steel scrap, molten clear after, draw a design and carry out total analysis, after result to be analyzed quotes, adjust composition, make that its C content is 0.75, si content 0.35, contain Mn amount 1.2, contain S and P amount≤0.045.Skim and carry out final deoxygenation, tapping when tapping temperature is controlled at 1520 ℃; The steel ball of having cast is removed the surplus sand on the foundry goods through insulation, hands over inspection after the reconditioning, and heat-treats; Quench treatment is at first carried out in thermal treatment, and temperature is between 850 ℃, and diameter is the steel ball constant temperature 2.5 hours of 40-60mm, diameter was the steel ball constant temperature of 70-100mm 3.5 hours, quench in useless machinery oil, carry out temper after the quenching again, temperature is incubated more than 4 hours in the time of 220 ℃.
If the steel ball of producing with present method when requiring impelling strength high, carries out normalizing treatment, and temperature is between 820-850 ℃, and diameter is steel ball constant temperature 2-3 hour of 40-60mm, and diameter is steel ball constant temperature 2-4 hour of 70-100mm.
Embodiment 2: the method with embodiment 1 is carried out moulding and smelting, draws a design after molten clear and carries out total analysis, is adjusted to timesharing, makes that its C content is 0.80, si content 0.40, contains Mn amount 1.20, contains Cr amount 1.0, contains S and P amount≤0.045.Skim and carry out final deoxygenation, tapping when tapping temperature is controlled at 1550 ℃; The steel ball of having cast is removed the surplus sand on the foundry goods through insulation, hands over inspection after the reconditioning, and heat-treats; Heat treating method is the same with embodiment 1.
Embodiment 3: a kind of production method of abrasion-proof steel ball, and molding sand adopts the dried quartz sand of 20-40 order, and dioxide-containing silica must not contain splashings, micro mist, impurity and moisture etc. greater than 92%; Adopt one dimension shaking table vibration molding, insert the sand of some amount in sandbox, vibration is wipeed off and is formed the casting bed of placing the EPS model, and casting bed thickness will be decided on the foundry goods size; By processing requirement the EPS model is placed on the casting bed in the sandbox, carries out the model assembling by the casting technique requirement, and training sand fixes, the orientation that model is placed must meet processing requirement; After model fixes, add sand, adding sand must evenly should evenly improve the sand post inside and outside the model, and the operator must be noted that and prevents to cause model deformation in the back-up sand process; Sandbox is placed on carries out vibration ramming on the shaking table, model is able to firmly; The dry sand casting mold through vibration after, reach compacting effect, for keeping the casting mold behind the consolidation, the sandbox surface will seal with plastics film, opens vacuum pump, forms negative pressure, prepares casting; Acidic liner, double slag process is made new slag after promptly molten clear, carries out final deoxygenation and inserts the aluminium method; Little in crucible bottom some lumpiness of packing into, the furnace charge of consolidation, add in succession by its requirement, slag charge accounts for 1.5% of furnace charge, adds remaining steel scrap, molten clear after, draw a design and carry out total analysis, after result to be analyzed quotes, adjust composition, make that its C content is 0.82, si content 0.35, contain Mn amount 1.15, contain S and P amount≤0.045.Skim and carry out final deoxygenation, tapping when tapping temperature is controlled at 1520 ℃; The steel ball of having cast is removed the surplus sand on the foundry goods through insulation, hands over inspection after the reconditioning, and heat-treats; Quench treatment is at first carried out in thermal treatment, and temperature is between 850 ℃, and diameter is the steel ball constant temperature 2.5 hours of 40-60mm, diameter was the steel ball constant temperature of 70-100mm 3.5 hours, quench in useless machinery oil, carry out temper after the quenching again, temperature is incubated more than 4 hours in the time of 220 ℃.
If the steel ball of producing with present method when requiring impelling strength high, carries out normalizing treatment, and temperature is between 820-850 ℃, and diameter is steel ball constant temperature 2-3 hour of 40-60mm, and diameter is steel ball constant temperature 2-4 hour of 70-100mm.
Embodiment 4, carry out moulding and smelting with the method for embodiment 3, draw a design after molten clear and carry out total analysis, are adjusted to timesharing, make that its C content is 0.80, si content 0.40, contain Mn amount 1.20, contain S and P amount≤0.045.Skim and carry out final deoxygenation, tapping when tapping temperature is controlled at 1540 ℃; The steel ball of having cast is removed the surplus sand on the foundry goods through insulation, hands over inspection after the reconditioning, and heat-treats; Heat treating method is the same with embodiment 3.
Claims (7)
1, a kind of production method of abrasion-proof steel ball adopts quartz sand, river sand molding, it is characterized in that: acidic liner, and double slag process is promptly moltenly made new slag after clear, carries out final deoxygenation and inserts the aluminium method; At the crucible bottom furnace charge of packing into, slag charge accounts for the 1%-1.5% of furnace charge, add remaining steel scrap, after melting clearly, draw a design and carry out total analysis, after result to be analyzed quotes, adjust composition, to make its C content be 0.60-0.95, si content 0.2-0.65, contain Mn amount 0.6-1.6, contain S and P amount≤0.045, skims and carry out final deoxygenation, tapping when tapping temperature is controlled at 1500-1550 ℃; The steel ball of having cast is removed the surplus sand on the foundry goods through insulation, hands over inspection after the reconditioning, and heat-treats; Quench treatment is at first carried out in thermal treatment, and temperature is between 820-880 ℃, and diameter is steel ball constant temperature 2-3 hour of 40-60mm, and diameter carries out quench treatment the steel ball constant temperature of 70-100mm 3-4 hour in useless machinery oil; Carry out temper after the quenching again, temperature is incubated more than 4 hours in the time of 200-240 ℃.
2, the production method of abrasion-proof steel ball according to claim 1, it is characterized in that: said moulding process is: facing sand adopts 40-70 purpose synthetic quartz sand, the silicon content of quartz sand is not less than 90%, floor sand adopts river sand, quartz sand is 80-100 part, wilkinite 2-6 part, water 4-8 part, and the mulling time can not be lower than 8 minutes; The sandbox template is put well back dress sand, cover template and model 15-40 millimeter, sand is fixed, refill the sand 10-30 millimeter case of can pounding, refill sand at last one time, exceed sandbox 30-50 millimeter, with the plane reality of pounding, and wipe off with scraper plate, prick the core hole of 2-8 millimeter, template is tripped out after playing top box; Template trips out and mends case, detains case then.
3, the production method of abrasion-proof steel ball according to claim 1, it is characterized in that: molding sand adopts the dried quartz sand of 20-40 order in the said moulding process, dioxide-containing silica is greater than 92%,, adopt one dimension shaking table vibration molding, in sandbox, insert the sand of some amount, vibration, wipe off to form place the casting bed of EPS model, casting bed thickness will be decided on the foundry goods size, by processing requirement the EPS model is placed on the casting bed in the sandbox, carry out the model assembling by the casting technique requirement, and train sand and fix, after model fixes, add sand, sandbox is placed on carries out vibration ramming on the shaking table, the sandbox surface will seal with plastics film, opens vacuum pump, forms negative pressure.
4, the production method of abrasion-proof steel ball according to claim 1 is characterized in that: to make its composition be adjusted into C content after said smelting technology is molten clear be 0.60-0.95, si content 0.2-0.65, contain Mn amount 1.0-1.6, contain S and P amount≤0.045.
5, the production method of abrasion-proof steel ball according to claim 1 is characterized in that: to make its composition be adjusted into C content after said smelting technology is molten clear be 0.60-0.90, si content 0.2-0.60, contain Mn amount 0.6-1.5, contain Cr amount 0.3-1.5, contain S and P amount≤0.045.
6, the production method of abrasion-proof steel ball according to claim 1 is characterized in that: to make its composition be adjusted into C content after said smelting technology is molten clear be 0.75-0.85, si content 0.2-0.45, contain Mn amount 1.0-1.25, contain S and P amount≤0.045.
7, the production method of abrasion-proof steel ball according to claim 1, it is characterized in that: if when the steel ball of producing with present method requires impelling strength high, can carry out normalizing treatment, temperature is between 820-850 ℃, diameter is steel ball constant temperature 2-3 hour of 40-60mm, and diameter is steel ball constant temperature 2-4 hour of 70-100mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 03108590 CN1205348C (en) | 2003-03-31 | 2003-03-31 | Wear resistant steel ball production process |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 03108590 CN1205348C (en) | 2003-03-31 | 2003-03-31 | Wear resistant steel ball production process |
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| CN1205348C CN1205348C (en) | 2005-06-08 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101724742B (en) * | 2008-10-22 | 2012-05-23 | 洛阳轴研科技股份有限公司 | Heat treatment process of notch ductile steel bearing balls |
| CN104250702A (en) * | 2014-09-24 | 2014-12-31 | 青岛楚天节能技术有限公司 | Wear-resisting steel ball and preparation method thereof |
| CN104275232A (en) * | 2014-05-24 | 2015-01-14 | 宁国市南方耐磨材料有限公司 | Wear-resisting ball with TiAlN coating |
| CN104275231A (en) * | 2014-05-24 | 2015-01-14 | 宁国市南方耐磨材料有限公司 | Anticorrosion high-hardness wear-resisting ball |
| CN104275449A (en) * | 2014-10-21 | 2015-01-14 | 安徽省萧县华龙耐火材料有限责任公司 | Mixing roll scraper production process |
| CN104476126A (en) * | 2014-11-17 | 2015-04-01 | 芜湖福司精密模具有限公司 | Manufacturing method for machine tool guide rail |
| CN104593662A (en) * | 2014-02-24 | 2015-05-06 | 铜陵深源工贸有限责任公司 | Formula and preparation method of steel ball |
| CN106834971A (en) * | 2016-12-28 | 2017-06-13 | 芜湖市永帆精密模具科技有限公司 | A kind of corrosion-resistant cracking resistance abrasion-proof steel ball |
| CN107620009A (en) * | 2017-08-23 | 2018-01-23 | 宁国慧宏耐磨材料有限公司 | One kind is used for small-sized tube mill low manganess steel ball and preparation method thereof |
-
2003
- 2003-03-31 CN CN 03108590 patent/CN1205348C/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101724742B (en) * | 2008-10-22 | 2012-05-23 | 洛阳轴研科技股份有限公司 | Heat treatment process of notch ductile steel bearing balls |
| CN104593662A (en) * | 2014-02-24 | 2015-05-06 | 铜陵深源工贸有限责任公司 | Formula and preparation method of steel ball |
| CN104275232A (en) * | 2014-05-24 | 2015-01-14 | 宁国市南方耐磨材料有限公司 | Wear-resisting ball with TiAlN coating |
| CN104275231A (en) * | 2014-05-24 | 2015-01-14 | 宁国市南方耐磨材料有限公司 | Anticorrosion high-hardness wear-resisting ball |
| CN104275231B (en) * | 2014-05-24 | 2016-08-24 | 宁国市南方耐磨材料有限公司 | A kind of corrosion-resistant high hardness wear-resisting ball |
| CN104250702A (en) * | 2014-09-24 | 2014-12-31 | 青岛楚天节能技术有限公司 | Wear-resisting steel ball and preparation method thereof |
| CN104275449A (en) * | 2014-10-21 | 2015-01-14 | 安徽省萧县华龙耐火材料有限责任公司 | Mixing roll scraper production process |
| CN104275449B (en) * | 2014-10-21 | 2016-03-23 | 安徽省萧县华龙耐火材料有限责任公司 | A kind of production technology of mixing roll scraper plate |
| CN104476126A (en) * | 2014-11-17 | 2015-04-01 | 芜湖福司精密模具有限公司 | Manufacturing method for machine tool guide rail |
| CN106834971A (en) * | 2016-12-28 | 2017-06-13 | 芜湖市永帆精密模具科技有限公司 | A kind of corrosion-resistant cracking resistance abrasion-proof steel ball |
| CN107620009A (en) * | 2017-08-23 | 2018-01-23 | 宁国慧宏耐磨材料有限公司 | One kind is used for small-sized tube mill low manganess steel ball and preparation method thereof |
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| CN1205348C (en) | 2005-06-08 |
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