CN101612666B - Alloy steel shot preparation method and device therefor - Google Patents
Alloy steel shot preparation method and device therefor Download PDFInfo
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- CN101612666B CN101612666B CN2009100747362A CN200910074736A CN101612666B CN 101612666 B CN101612666 B CN 101612666B CN 2009100747362 A CN2009100747362 A CN 2009100747362A CN 200910074736 A CN200910074736 A CN 200910074736A CN 101612666 B CN101612666 B CN 101612666B
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Abstract
The invention discloses an alloy steel shot preparation method and a device therefor; the method is characterized in that a ring-shaped spraying device is additionally arranged outside a centrifugal shot making machine to lead alloy steel melt liquid to obtain small liquid drops by being ejected from a centrifugal machine, and then the small liquid drops are quenched by shock chilling via water, so that a microstructure of the alloy steel shot is improved, the strength of the alloy steel shot is enhanced, the alloy steel shot oxidation is reduced and finished product ratio is increased through shortening the retention time of the high-temperature alloy steel shot in the air. The invention has the characteristic of obviously improved strength of the alloy steel shot, and can cancel subsequent quenching process, thus simplifying production processes.
Description
Technical field
The present invention relates to a kind of devices and methods therefor that is used to prepare alloy balls.
Background technology
In field of metal casting technology, by ball blast and bead metal casting being removed processing such as burr, rust cleaning polishing is the surface treatment method of using always.Wherein the ball blast material of consumption maximum is alloy balls and powdered alloy steel, and the intensity and the hardness of alloy balls (powder) are most important to Shot Blasting.The basic principle of preparation alloy balls and powdered alloy steel is to utilize the energy of a definite form and size, smashes the molten steel with cohesive force, and the molten steel after smashing is dropped in the cooling process of setting, leans on the surface tension self-constriction of self to become ball.Preparation method commonly used has two kinds: a kind of is the water flow jet method, by quick injection water the steel alloy fused solution is dispersed into droplet, is shrunk to spherical particle then, simultaneously chilling and quenching; Another kind method is the centrifugal ball method of making, and the steel alloy fused solution falls into the granulation cup of rotation at a high speed by gravity, utilizes centrifugal force that the steel alloy fused solution is thrown away, and is dispersed into fine drop, and cooling is shrunk to ball in the process of flight.
The advantage of water flow jet method is that the steel alloy fused solution is in becoming the ball process, simultaneously by the high-speed water jet chilling and quenching, its structure is oversaturated martensite and a spot of retained austenite, in post processing, generally do not need secondary quenching to handle, only need temper just can reach hardness and quality requirement.The shortcoming of this method is that the particle sphericity is bad, need select circle to product, with the aspherical particle blanking; In addition because the quenching of fused solution cause alloy balls as cast condition crackle easily, so yield rate is low.
The centrifugal advantage of making the ball method is that the alloy balls particle size distribution is narrow, the porosity is low, profile rounding, bonding phenomenon are few; Molten steel goes out ball rate height, and product sphericity height does not need again through selecting the sired results preface to remove special-shaped shot; It is less that the as cast condition seminess appears in alloy balls, therefore compares with the water flow jet method, and the yield rate of this method is much higher.Its shortcoming is because the high speed rotation of centrifuge, the distance that drop is thrown out of is far away, generally needs diameter to surpass 15 meters pond, and the steel alloy fused solution is just fallen in the water drop to lower temperature gradually in the process of flight after, have certain annealing effect, reduced the intensity of product.
Summary of the invention
The present invention is for overcoming problems of the prior art, a kind of preparation method and device of alloy balls are provided, it can make that the alloy balls particle size distribution is narrow, the porosity is low, profile rounding, bonding phenomenon are few, and molten steel goes out ball rate height, saves investment and operating cost.
The present invention is achieved by the following technical programs:
A kind of alloy balls preparation facilities, it comprises centrifugally makes ball machine 7, steel alloy fused solution funnel 5, makes annular liquid distribution and the round pool 1 that ball machine 7 is the center outward direction with centrifugal; Described annular liquid distribution comprises annular trickle groove 3, annular spray pipe 6, described annular spray pipe 6 is arranged in annular trickle groove 3, the below of described annular spray pipe 6 is provided with some equally distributed water jets, and described annular liquid distribution is supported by plural bracing frame 2; Described annular spray pipe 6 is connected with plural water inlet pipe 4, and described steel alloy fused solution funnel 5 is positioned at centrifugal top of making ball machine 7, and described centrifugal top of making the ball machine is provided with makes the ball cup.
The diameter of described annular trickle groove 3 is Ф 2m～Ф 10m, and the upper edge, both sides of described annular trickle groove 3 is a zigzag.
The diameter of described annular trickle groove 3 is Ф 4m～Ф 8m, and the difference in height of upper edge, the both sides diverse location of described annular trickle groove 3 is that it is even to be beneficial to trickle below the 3mm, and the degree of depth of described annular trickle groove 3 is 300mm.
The water jet of the below of described annular spray pipe 6 is Ф 2mm～Ф 3mm circular hole, and its spacing of being separated by is 10～21mm.
Described water inlet pipe is 4～8.
Use said apparatus to prepare the method for alloy balls, it may further comprise the steps:
A. open the water inlet pipe valve, cooling water enters trickle groove 3 by the water jet of water inlet pipe 4 and annular spray pipe 6, and the adjusting total inflow is 30～60m
3/ h makes water evenly flow down from the zigzag upper edge, both sides of annular trickle groove 3, forms the uniform cascade of twice.
B. open the centrifugal ball machine of making, regulate the centrifugal rotating speed 800～1000 of making ball machine 7 by frequency modulator and change.
C. pour the steel alloy fused solution into steel alloy fused solution funnel 5 by the molten steel tundish, the steel alloy fused solution by steel alloy fused solution funnel 5 fall into be positioned at centrifugal make ball machine top make the ball cup, the steel alloy fused solution is thrown out of by the ball cup of making of rotation at a high speed, and forms tiny molten melt drop.
D. molten melt drop cooling gradually in the process of flight is frozen into the tiny solid particle, i.e. alloy balls, and the cascade quenching that is fallen on the annular trickle groove 3 is immediately quenched, and falls into the water then.
E. alloy balls is pulled out from water, carried out follow-up processing, promptly get alloy balls.
Annular liquid distribution of the present invention, the water jet of the annular spray pipe in the annular trickle groove make the water back water spray downwards that comes out in manage, to reduce going up the disturbance of the water surface in the groove below pipe.
The design and installation of liquid distribution will guarantee that water evenly falls with the form of curtain shape everywhere, form the barrier of a water.Alloy balls throws away at the centrifugal ball cup of making that is rotated at a high speed, and is cooled to spherical particle in flight course, after being reduced to about 800-900 ℃, is carried out Quenching Treatment by the water that falls with curtain shape form on the annular liquid distribution, falls into the water in pond then.The diameter of annular trickle groove can determine that its principle is after the steel alloy fused solution is thrown out of, and has been frozen into the moment of solid particle according to the size of the alloy balls of being produced, the centrifugal rotating speed of making the ball machine, touches the cascade barrier at once.
The beneficial effect that the present invention compared with prior art has is:
Method and apparatus provided by the invention has been gathered the general centrifugal advantage that ball method and water flow jet are made the ball method of making, and has avoided both intrinsic shortcomings.Compare with the general centrifugal ball of making, method and apparatus provided by the invention has following advantage: (1) is because the quenching effect of trickle, make the microstructure remarkable improvement of alloy pellets, do not having under the specific (special) requirements, can save follow-up Quenching Treatment, directly carry out temper, simplified operation, reduced cost.(2) because the shock chilling function of trickle, the time that makes alloy pellets be in high temperature aloft in the flight course shortens, and has reduced the alloy balls oxidation, and the yield rate of the especially tiny shot of product is improved greatly.(3) by the retardation of annular curtain shape trickle, the flying distance of alloy balls obviously shortens, and can reduce the size in pond, saves investment and operating cost.
Make the ball method with water flow jet and compare, the advantage that method and apparatus provided by the invention has comprises: the alloy balls particle size distribution is narrow, the porosity is low, the profile rounding, the bonding phenomenon few; Molten steel goes out ball rate height, and product sphericity height does not need again through selecting the sired results preface to remove special-shaped shot; Yield rate is much higher.
Description of drawings
Fig. 1 is an alloy balls preparation facilities front view of the present invention;
Fig. 2 is an alloy balls preparation facilities vertical view of the present invention.
The specific embodiment
The present invention is further illustrated below in conjunction with accompanying drawing.
In accompanying drawing 1 and accompanying drawing 2,1 is the pond, and 2 is bracing frame, and 3 is annular trickle groove, and 4 is water inlet pipe, and 5 is steel alloy fused solution funnel, and 6 is annular spray pipe, and 7 are the centrifugal ball machine of making.
Alloy balls preparation facilities of the present invention, it comprises centrifugally makes ball machine 7, steel alloy fused solution funnel 5, makes annular liquid distribution and the round pool 1 that ball machine 7 is the center outward direction with centrifugal; Described annular liquid distribution comprises annular trickle groove 3, annular spray pipe 6, described annular spray pipe 6 is arranged in annular trickle groove 3, the below of described annular spray pipe 6 is provided with some equally distributed water jets, and described annular liquid distribution is supported by plural bracing frame 2; Described annular spray pipe 6 is connected with plural water inlet pipe 4, and described steel alloy fused solution funnel 5 is positioned at centrifugal top of making ball machine 7, and described centrifugal top of making the ball machine is provided with makes the ball cup.
The diameter of described annular trickle groove 3 is Ф 2m～Ф 10m, and the upper edge, both sides of described annular trickle groove 3 is a zigzag.
The diameter of described annular trickle groove 3 is Ф 4m～Ф 8m, and the difference in height of upper edge, the both sides diverse location of described annular trickle groove 3 is that it is even to be beneficial to trickle below the 3mm, and the degree of depth of described annular trickle groove 3 is 300mm.
The water jet of the below of described annular spray pipe 6 is Ф 2mm～Ф 3mm circular hole, and its spacing of being separated by is 10～21mm.
Described water inlet pipe is 4～8.
Use apparatus of the present invention to prepare the method for alloy balls, it may further comprise the steps:
A. open the water inlet pipe valve, cooling water enters trickle groove 3 by the water jet of water inlet pipe 4 and annular spray pipe 6, and the adjusting total inflow is 30～60m
3/ h makes water evenly flow down from the zigzag upper edge, both sides of annular trickle groove 3, forms the uniform cascade of twice.
B. open the centrifugal ball machine of making, regulate the centrifugal rotating speed 800～1000 of making ball machine 7 by frequency modulator and change.
C. pour the steel alloy fused solution into steel alloy fused solution funnel 5 by the molten steel tundish, the steel alloy fused solution by steel alloy fused solution funnel 5 fall into be positioned at centrifugal make ball machine top make the ball cup, the steel alloy fused solution is thrown out of by the ball cup of making of rotation at a high speed, and forms tiny molten melt drop.
D. molten melt drop cooling gradually in the process of flight is frozen into the tiny solid particle, i.e. alloy balls, and the cascade quenching that is fallen on the annular trickle groove 3 is immediately quenched, and falls into the water then.
E. alloy balls is pulled out from water, carried out follow-up processing, promptly get alloy balls.
Centrifugal ball machine 7 rotating speeds of making are controlled at 850 commentaries on classics; The diameter of annular liquid distribution is Ф 6m, and the tank width is 300mm, and the degree of depth is 300mm; The sparge pipe diameter is Ф 32 * 3mm; Transfer at sparge pipe and to offer Ф 3mm circular hole, the spacing of being separated by is 20mm, and water inlet pipe is established 6 altogether, differs 90 ° of installations on annular spray pipe, and total inflow is 50m
3/ h establishes 6 bracing frames altogether.Through centrifugal make the ball cup and throw away after, the cooling behind the about 2.5m of flight of steel alloy fused solution becomes solid particle, carries out rapid quenching at 3m annular cascade place and cools off.The alloy balls particle mean size that produces is 1.5mm, carries out temper in follow-up heat treatment step one time, and product mean intensity after testing reaches HRC48.5, meets the standard-required as metal abrasives.
The centrifugal ball machine rotating speed of making is controlled at 950 commentaries on classics; The diameter of annular liquid distribution is Ф 4m, and the tank width is 200mm, and the degree of depth is 300mm; The sparge pipe diameter is Ф 25 * 3mm, transfers at sparge pipe and offers Ф 2mm circular hole, and the spacing of being separated by is 20mm; Water inlet pipe is established 4 altogether, is separated by 90 ° to install on annular spray pipe, and total inflow is 30m
3/ h establishes 4 bracing frames altogether.Through centrifugal make the ball cup and throw away after, the cooling behind the about 1.5m of flight of steel alloy fused solution becomes solid particle, carries out rapid quenching at 2m annular cascade place and cools off.The alloy balls particle mean size that produces is 1.0mm, carries out temper in follow-up heat treatment step one time, and product mean intensity after testing reaches HRC47.8, meets the standard-required as metal abrasives.
The present invention makes the steel alloy fused solution throw away through centrifuge to be quenched by the water quenching as early as possible after becoming fine droplet, thereby improves the microstructure of alloy balls, improves the intensity of alloy balls; By shortening the high temperature alloy aerial time of staying of powder, reduce tiny powdered alloy steel oxidation simultaneously, improve yield rate.
Claims (5)
1. alloy balls preparation facilities, it comprises centrifugally makes ball machine (7), steel alloy fused solution funnel (5), makes annular liquid distribution and the round pool (1) that ball machine (7) is the center outward direction with centrifugal; It is characterized in that, described annular liquid distribution comprises annular trickle groove (3), annular spray pipe (6), described annular spray pipe (6) is arranged in annular trickle groove (3), the below of described annular spray pipe (6) is provided with some equally distributed water jets, and described annular liquid distribution is supported by plural bracing frame (2); Described annular spray pipe (6) is connected with plural water inlet pipe (4), and described steel alloy fused solution funnel (5) is positioned at centrifugal top of making ball machine (7), and described centrifugal top of making the ball machine is provided with makes the ball cup;
The diameter of described annular trickle groove (3) is Φ 2m～Φ 10m, and the upper edge, both sides of described annular trickle groove (3) is a zigzag.
2. alloy balls preparation facilities as claimed in claim 1, it is characterized in that, the diameter of described annular trickle groove (3) is Φ 4m～Φ 8m, the difference in height of upper edge, the both sides diverse location of described annular trickle groove (3) is below the 3mm, it is even to be beneficial to trickle, and the degree of depth of described annular trickle groove (3) is 300mm.
3. alloy balls preparation facilities as claimed in claim 1 is characterized in that, the water jet of the below of described annular spray pipe (6) is Φ 2mm～Φ 3mm circular hole, and its spacing of being separated by is 10～21mm.
4. alloy balls preparation facilities as claimed in claim 1 is characterized in that, described water inlet pipe (4) is 4～8.
5. use the described device of claim 1 to prepare the method for alloy balls, it is characterized in that it may further comprise the steps:
A. open the water inlet pipe valve, cooling water enters annular trickle groove (3) by the water jet of water inlet pipe (4) and annular spray pipe (6), and the adjusting total inflow is 30～60m
3/ h makes water evenly flow down from the zigzag upper edge, both sides of annular trickle groove (3), forms the uniform cascade of twice;
B. open the centrifugal ball machine of making, regulate the centrifugal rotating speed 800～1000 of making ball machine (7) by frequency modulator and change;
C. pour the steel alloy fused solution into steel alloy fused solution funnel (5) by the molten steel tundish, the steel alloy fused solution by steel alloy fused solution funnel (5) fall into be positioned at centrifugal make ball machine top make the ball cup, the steel alloy fused solution is thrown out of by the ball cup of making of rotation at a high speed, and forms tiny molten melt drop;
D. molten melt drop cooling gradually in the process of flight is frozen into the tiny solid particle, i.e. alloy balls, and the cascade quenching that is fallen on the annular trickle groove (3) is immediately quenched, and falls into the water then;
E. alloy balls is pulled out from water, carried out follow-up processing, promptly get alloy balls.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100747362A CN101612666B (en) | 2009-06-15 | 2009-06-15 | Alloy steel shot preparation method and device therefor |
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| CN2009100747362A CN101612666B (en) | 2009-06-15 | 2009-06-15 | Alloy steel shot preparation method and device therefor |
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| CN101612666B true CN101612666B (en) | 2011-07-20 |
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Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101760693A (en) * | 2010-02-10 | 2010-06-30 | 淄博大亚金属科技股份有限公司 | Low segregation low-carbon casting steel shot |
| CN101767191B (en) * | 2010-02-10 | 2012-02-22 | 淄博大亚机电科技有限公司 | Centrifugal pan for steel shot molding and manufacturing method thereof |
| CN101880171B (en) * | 2010-06-23 | 2012-07-25 | 山东理工大学 | Preparation method of molten steel dispersion centrifugal disc |
| CN102029227B (en) * | 2010-10-27 | 2012-02-01 | 山东开泰抛丸机械有限公司 | Centrifugal machine used for producing cast steel shot |
| CN102554248B (en) * | 2011-11-15 | 2013-07-24 | 唐山市嘉恒实业有限公司 | Ferronickel granulation method and ferronickel granulation device |
| CN103111626B (en) * | 2013-02-26 | 2014-12-03 | 连云港倍特超微粉有限公司 | Miniature alloy steel shot preparation method |
| EA031421B1 (en) * | 2013-09-05 | 2018-12-28 | Увон Холдинг Аб | Granulation of molten material |
| EP2926928A1 (en) * | 2014-04-03 | 2015-10-07 | Uvån Holding AB | Granulation of molten ferrochromium |
| CN104493188B (en) * | 2015-01-04 | 2016-07-06 | 多棱新材料股份有限公司 | Shot-peening produces equipment and production technology thereof with steel ball |
| CN105385961B (en) * | 2015-12-16 | 2018-09-28 | 淄博鲁宝金属制品有限公司 | Wear-resisting low-carbon shot and preparation method thereof and centrifugal atomization apparatus |
| CN106623955A (en) * | 2016-12-27 | 2017-05-10 | 青岛百利达钢丸设备科技有限公司 | Centrifugal granulator with water circulation system |
| CN106735277B (en) * | 2016-12-27 | 2018-07-03 | 重庆市青蓝机械制造有限公司 | Cast steel ball production centrifuge |
| CN106825595B (en) * | 2016-12-27 | 2018-07-03 | 重庆市青蓝机械制造有限公司 | Shot production line |
| CN115350645B (en) * | 2022-10-20 | 2023-04-07 | 山东开泰抛丸机械股份有限公司 | Metal shot centrifugal atomization device |
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Address after: 225300 No. 21, Gangcheng Road, Gaogang District, Jiangsu, Taizhou Patentee after: Lianyungang Beautech Superfine Co., Ltd. Address before: 222133 Jiangsu city of Lianyungang province Ganyu County huandun Industrial Park Patentee before: Lianyungang Beautech Superfine Co., Ltd. |
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Address after: 222133 Jiangsu city of Lianyungang province Ganyu County huandun Industrial Park Patentee after: Lianyungang Beautech Superfine Co., Ltd. Address before: 225300 No. 21, Gangcheng Road, Gaogang District, Jiangsu, Taizhou Patentee before: Lianyungang Beautech Superfine Co., Ltd. |