CN101705460B - Application method of friction stirring processing technology in high silicon-aluminium alloy cylinder sleeve - Google Patents
Application method of friction stirring processing technology in high silicon-aluminium alloy cylinder sleeve Download PDFInfo
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- CN101705460B CN101705460B CN2009101913459A CN200910191345A CN101705460B CN 101705460 B CN101705460 B CN 101705460B CN 2009101913459 A CN2009101913459 A CN 2009101913459A CN 200910191345 A CN200910191345 A CN 200910191345A CN 101705460 B CN101705460 B CN 101705460B
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Abstract
The invention relates to an application method of friction stirring processing technology in high silicon-aluminium alloy cylinder sleeve, which is applied to the requirements of improving the abrasive resistance of the engine, reducing exhaust gas discharge and prolonging service life. The manufacturing method is as follows: descaling the blank surface of the cylinder sleeve and cleaning; fixing the well-cleaned cylinder sleeve blank on the rotatable fixture and fixing the fixture integrally on the horizontal moving platform of a stirring processing device; processing the materials between the outer surface of the cylinder sleeve blank and the position 0.3mm far away from the inner surface by using the friction processing device, wherein the rotational speed of the stirring head is 800-1500rpm, and the speed of the production line of the stirring head is 15-40mm/min; carrying out friction stirring processing on the whole cylinder sleeve blank materials; and finally carrying out mechanical chipping and grinding to obtain the cylinder sleeve parts. The application of the invention can reduce the size of the reinforcement particles distributed in the cylinder sleeve from 30-50 mu m to below 10 mu m, improve the evenness of the distribution of particles, dramatically improve the abrasive resistance of the inner surface of the cylinder sleeve, lower abrasion coefficient, and prolong service life; and the preparation process is simple.
Description
Technical field
The present invention relates to the application method of a kind of friction stirring processing technology at high-silicon aluminum alloy cylinder sleeve, it is applicable to the engine wear resistance improves, discharge amount of exhaust gas reduces and be to use that the life-span prolongs demand.
Background technology
The high-silicon aluminum alloy cylinder sleeve of casting, after using for some time, endoporus wearing and tearing aggravation produces bigger gap between casing wall and the piston ring, cause engine to become flat, and active power reduces, and Oil Consumption rises significantly, and engine reduces work-ing life.Therefore, research and development improve cylinder sleeve inner tissue structure, refinement enhanced granule particle diameter, and can obtaining to have more, the aluminium alloy cylinder sleeve of high-wear resistance, lower coefficient of wear seems particularly important.
Friction stirring processing technology (Friction stir processing) is by Britain's institute of welding (The Welding Institute, TWI) the friction stir welding connection technology (patent No. US5460317 of company's invention, 1991.12) develop, have special advantages aspect the preparation fine grained texture.The ultimate principle of this technology is to utilize the stirring-head of high speed rotating (mixing needle) to insert in the material, utilizes the strong friction and the stirring action of stirring-head, makes the stirring area material be in the thermoplasticity state and is broken, mixes.
Chinese invention patent 200810070197.0 discloses a kind of utilization centrifugal casting and has prepared inner layer granule reinforced cylinder sleeve and manufacture method thereof.This cylinder sleeve comprises the enhancement layer and the outer field non-enhancement layer of internal layer, and enhancement layer is distributed with a large amount of primary silicons and Mg
2The Si particle does not comprise primary silicon and Mg in the non-enhancement layer
2The Si particle, enhancement layer combines with the transition layer of non-enhancement layer by metallurgical binding, and this cylinder sleeve adopts centre spinning method to be prepared from primary silicon and Mg
2The Si grain diameter is bigger.English Patent GB972095 has announced a kind of method that adopts die-casting and molding technology to prepare high-silicon aluminum alloy cylinder sleeve, also is difficult to obtain tiny and uniform high hardness compound particle phase and high siliceous point.
Chinese patent 200810163877.7 discloses a kind of preparation method who uses high-silicon aluminum alloy cylinder sleeve.This method needs utilization spray deposition acquisition extrusion blank earlier, and extruding obtains the tubular extrusion billet then, and last thermal treatment, mechanical workout obtain cylinder liner blank.Prepared material has comparatively tiny weave construction and preferable performance, but required operation is longer, and tooling cost is higher.
Summary of the invention
The objective of the invention is to overcome problems of the prior art, the high-silicon aluminum alloy cylinder sleeve internal organizational structure of utilization friction stirring processing technology refinement casting provides the application method of a kind of friction stirring processing technology at high-silicon aluminum alloy cylinder sleeve.
Realize that step of the present invention is:
1. will clean up again behind the cylinder liner blank outside surface descaling; 2. the cylinder liner blank that cleans up is fixed on the rotatable anchor clamps, and with the anchor clamps overall fixed on the horizontal shifting platform of stirring and processing equipment; 3. utilization friction processing units to the cylinder liner blank outside surface to processing apart from the material of its internal surface 0.3mm depths, the stirring-head speed of rotation is 800-1500rpm, stirring-head processing line speed is 15-40mm/min, realization can be carried out water-cooled to workpiece simultaneously to the processing of whole cylinder liner blank in this process; 4. mechanical smear metal, hone obtain the cylinder sleeve part.
Beneficial effect of the present invention is:
1. can obtain tiny Si, Mg by the friction stir method
2Si particle and tiny eutectic structure, this kind weave construction can greatly improve the abrasion resistance properties of material, reduces the frictional coefficient of material and reduces engine consumption, finally is applied on high-performance enginer.
2. technology of the present invention is the application of utilization friction stir technology aspect the cylinder jacket material modification, and the controllability of production is strong.
Description of drawings
Fig. 1 is the synoptic diagram of friction stir processing cylinder sleeve.
Fig. 2 is the sectional view of A-A section among Fig. 1.
Among the figure, 1 is rotating machine, and 2 is the stationary positioned piece, and 3 is cylinder liner blank, and 4 is the friction stir head, and 5 is the activity orientation piece, and 6 is the cantilever support device, and 7 is frame.
Embodiment
Referring to Fig. 1.Friction stirring processing technology of the present invention is as follows in the step of the application method of high-silicon aluminum alloy cylinder sleeve:
1. the high-silicon aluminum alloy cylinder sleeve blank surface-conditioning of casting preparation is clean; 2. the cylinder liner blank 3 that cleans up is fixed on the frock clamp with swivel arrangement and (comprises rotating machine 1, stationary positioned piece 2, activity orientation piece 5, cantilever support device 6 and frame 7).The rotation of cylinder sleeve can realize by the rotation of rotating machine 1, half-cylindrical cantilever arrangement 6 is consistent with the inboard wall of cylinder liner shape, play the effect of supporting inboard wall of cylinder liner, rotating machine is installed on the guide rail of frame 7, and whole frock clamp is fixed on moving horizontally on the workplatform of friction stir equipment; 3. use the friction stir processing units to the cylinder liner blank outside surface to processing apart from the material of its internal surface 0.3mm depths, friction stir 4 speed of rotation are 800-1500rpm, friction stir 4 a processing line speed are 15-40mm/min, rotation by sectional fixture and move radially mode of motion and realize processing to whole cylinder liner blank, simultaneously can be in this process to stirring-head near the workpiece cooling of spraying water; 4. the cylinder sleeve after the friction stir processing is heat-treated with mechanical workout and obtain the cylinder sleeve finished product.
Specific embodiment is as follows:
Embodiment 1
Cylinder sleeve to be processed: the internal surface that Al-2Si-5Mg alloy, rotary casting form is by primary silicon, Mg
2The Si symbiosis strengthens, and the enhanced granule particle diameter is 30-50 μ m.
The Al-21Si-5Mg alloy cylinder sleeve of roughing rotary casting moulding is removed cylinder sleeve surface scale and clean with alcohol wash; The cylinder sleeve that cleans up is fixed on the sectional fixture; Utilization friction stir processing units to the cylinder liner blank outside surface to processing apart from the material of its internal surface 0.3mm depths, the stirring-head speed of rotation is 1200-1500rpm, cylinder sleeve by the anchor clamps assembling rotates with the linear velocity of 35-40mm/min, stirring-head is with the speed of the 35mm/min shoulder breadth distance that moves ahead half after rotating a circle, so repeatedly, up to whole cylinder sleeve completion of processing; The friction stir processing cylinder sleeve is carried out mechanical smear metal, hone acquisition cylinder sleeve part.
Cylinder sleeve enhanced granule after the processing still is distributed in inner surface of cylinder liner, primary silicon particle and Mg
2The Si grain diameter is reduced to 7 μ m, and size distribution is more even, and the metal to-metal contact experiment shows that the frictional wear coefficient reduces by 12% through friction stir processing back material wear-resistant performance raising 80%.
Cylinder sleeve to be processed: the internal surface that Al-21Si-5Mg alloy, rotary casting form is by primary silicon, Mg
2The Si symbiosis strengthens, and the enhanced granule particle diameter is 30-50 μ m, and the volume fraction of enhanced granule is 25%.
The Al-21Si-5Mg alloy cylinder sleeve of roughing rotary casting moulding is removed cylinder sleeve surface scale and clean with alcohol wash; The cylinder sleeve that cleans up is fixed on the sectional fixture; Utilization friction stir processing units to the cylinder liner blank outside surface to processing apart from the material of its internal surface 0.3mm depths, the stirring-head speed of rotation is 1200-1500rpm, cylinder sleeve by the anchor clamps assembling rotates with the linear velocity of 35-40mm/min, stirring-head is with the speed of the 35mm/min shoulder breadth distance that moves ahead half after rotating a circle, so repeatedly, up to whole cylinder sleeve completion of processing, simultaneously near the cooling of spraying water of the material friction stir head; The friction stir processing cylinder sleeve is carried out mechanical smear metal, hone acquisition cylinder sleeve part.
Cylinder sleeve enhanced granule after the processing still is distributed in inner surface of cylinder liner, primary silicon particle and Mg
2The Si grain diameter is reduced to 5 μ m, and size distribution is more even, and the metal to-metal contact experiment shows that the frictional wear coefficient reduces by 10% through friction stir processing back material wear-resistant performance raising 90%.
Cylinder sleeve to be processed: the internal surface that Al-21Si-5Mg alloy, rotary casting form is by primary silicon, Mg
2The Si symbiosis strengthens, and the enhanced granule particle diameter is 30-50 μ m.
The Al-21Si-5Mg alloy cylinder sleeve surfaces externally and internally of roughing rotary casting moulding is removed cylinder sleeve surface scale and clean with alcohol wash; The cylinder sleeve that cleans up is fixed on the sectional fixture; Utilization friction stir processing units to the cylinder liner blank outside surface to processing apart from the material of its internal surface 0.3mm depths, the stirring-head speed of rotation is 800-1000rpm, cylinder sleeve by the anchor clamps assembling rotates with the linear velocity of 15-25mm/min, stirring-head is with the speed of the 15mm/min shoulder breadth distance that moves ahead half after rotating a circle, so repeatedly, up to whole cylinder sleeve completion of processing; The friction stir processing cylinder sleeve is carried out mechanical smear metal, hone acquisition cylinder sleeve part.
Cylinder sleeve enhanced granule after the processing still is distributed in inner surface of cylinder liner, and the primary silicon grain diameter is reduced to 8 μ m, even particle distribution, and the metal to-metal contact experiment shows that the frictional wear coefficient reduces by 13% through friction stir processing back material wear-resistant performance raising 86%.
Cylinder sleeve to be processed: the internal surface that Al-21Si-5Mg alloy, rotary casting form is by primary silicon, Mg
2The Si symbiosis strengthens, and the enhanced granule particle diameter is 30-50 μ m.
The Al-21Si-5Mg alloy cylinder sleeve surfaces externally and internally of roughing rotary casting moulding is removed cylinder sleeve surface scale and clean with alcohol wash; The cylinder sleeve that cleans up is fixed on the sectional fixture; Utilization friction stir processing units to the cylinder liner blank outside surface to processing apart from the material of its internal surface 0.3mm depths, the stirring-head speed of rotation is 1000-1200rpm, cylinder sleeve by the anchor clamps assembling rotates with the linear velocity of 25-30mm/min, stirring-head is with the speed of the 25mm/min shoulder breadth distance that moves ahead half after rotating a circle, so repeatedly, up to whole cylinder sleeve completion of processing; The friction stir processing cylinder sleeve is carried out mechanical smear metal, hone acquisition cylinder sleeve part.
Cylinder sleeve enhanced granule after the processing still is distributed in inner surface of cylinder liner, primary silicon, Mg
2The Si grain diameter is reduced to 8 μ m, even particle distribution, and the metal to-metal contact experiment shows that the frictional wear coefficient reduces by 15% through friction stir processing back material wear-resistant performance raising 90%.
Cylinder sleeve to be processed: Al-21Si alloy, pressure die casting form by primary silicon enhanced aluminium alloy cylinder sleeve blank, the enhanced granule particle diameter is 30-40 μ m.
The Al-21Si alloy cylinder sleeve surfaces externally and internally of roughing pressure die casting moulding is removed cylinder sleeve surface scale and clean with alcohol wash; The cylinder sleeve that cleans up is fixed on the sectional fixture; Utilization friction stir processing units to the cylinder liner blank outside surface to processing apart from the material of its internal surface 0.3mm depths, the stirring-head speed of rotation is 800-1000rpm, it is 15-20mm/min that cylinder sleeve moves radially linear velocity, rotate its cylinder liner blank then and proceed friction stir processing, so repeatedly, up to whole cylinder sleeve completion of processing, simultaneously near the cooling of spraying water of the material friction stir head; The friction stir processing cylinder sleeve is carried out mechanical smear metal, hone acquisition cylinder sleeve part.
Cylinder sleeve primary silicon grain diameter after the processing is reduced to 6 μ m, even particle distribution, and the metal to-metal contact experiment shows that the frictional wear coefficient reduces by 10% through friction stir processing back material wear-resistant performance raising 50%.
Cylinder sleeve to be processed: Al-21Si alloy, pressure die casting form by primary silicon enhanced aluminium alloy cylinder sleeve blank, the enhanced granule particle diameter is 30-40 μ m.
The Al-21Si alloy cylinder sleeve surfaces externally and internally of roughing pressure die casting moulding is removed cylinder sleeve surface scale and clean with alcohol wash; The cylinder sleeve that cleans up is fixed on the sectional fixture; Utilization friction stir processing units to the cylinder liner blank outside surface to processing apart from the material of its internal surface 0.3mm depths, the stirring-head speed of rotation is 800-1000rpm, it is 15-20mm/min that cylinder sleeve moves radially linear velocity, rotate its cylinder liner blank then and proceed friction stir processing, so repeatedly, up to whole cylinder sleeve completion of processing; The friction stir processing cylinder sleeve is carried out mechanical smear metal, hone acquisition cylinder sleeve part.
Cylinder sleeve primary silicon grain diameter after the processing is reduced to 4 μ m, even particle distribution, and the metal to-metal contact experiment shows that the frictional wear coefficient reduces by 8% through friction stir processing back material wear-resistant performance raising 60%.
Cylinder sleeve to be processed: Al-21Si alloy, pressure die casting form by primary silicon enhanced aluminium alloy cylinder sleeve blank, the enhanced granule particle diameter is 30-40 μ m.
The Al-21Si alloy cylinder sleeve surfaces externally and internally of roughing pressure die casting moulding is removed cylinder sleeve surface scale and clean with alcohol wash; The cylinder sleeve that cleans up is fixed on the sectional fixture; Utilization friction stir processing units to the cylinder liner blank outside surface to processing apart from the material of its internal surface 0.3mm depths, the stirring-head speed of rotation is 1000-1200rpm, it is 25-30mm/min that cylinder sleeve moves radially linear velocity, rotate its cylinder liner blank then and proceed friction stir processing, so repeatedly, up to whole cylinder sleeve completion of processing; The friction stir processing cylinder sleeve is carried out mechanical smear metal, hone acquisition cylinder sleeve part.
Cylinder sleeve primary silicon grain diameter after the processing is reduced to 5 μ m, even particle distribution, and the metal to-metal contact experiment shows that the frictional wear coefficient reduces by 7% through friction stir processing back material wear-resistant performance raising 56%.
Embodiment 8
Cylinder sleeve to be processed: what Al-21Si alloy, pressure die casting formed strengthens the aluminium alloy cylinder sleeve blank by primary silicon, and the enhanced granule particle diameter is 30-40 μ m.
The Al-21Si alloy cylinder sleeve surfaces externally and internally of roughing pressure die casting moulding is removed cylinder sleeve surface scale and clean with alcohol wash; The cylinder sleeve that cleans up is fixed on the sectional fixture; Utilization friction stir processing units to the cylinder liner blank outside surface to processing apart from the material of its internal surface 0.3mm depths, the stirring-head speed of rotation is 1200-1500rpm, it is 35-40mm/min that cylinder sleeve moves radially linear velocity, rotate its cylinder liner blank then and proceed friction stir processing, so repeatedly, up to whole cylinder sleeve completion of processing; The friction stir processing cylinder sleeve is carried out mechanical smear metal, hone acquisition cylinder sleeve part.
Cylinder sleeve primary silicon grain diameter after the processing is reduced to 6 μ m, and uniform particles distributes, and the metal to-metal contact experiment shows that processing back material wear-resistant performance through friction stir improves 50%, and the frictional wear coefficient reduces by 6%.
Need to prove at last, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not breaking away from the aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (5)
1. friction stirring processing technology is characterized in that at the application method of high-silicon aluminum alloy cylinder sleeve following steps are arranged:
1. with clean with alcohol wash again behind the cylinder liner blank outside surface descaling;
2. with on the fixing rotatable clamp for machining of clean cylinder liner blank, and with the anchor clamps overall fixed on the horizontal shifting platform of stirring and processing equipment;
3. use the friction stir processing units to liner backs to processing apart from the material of internal surface 0.3mm depths; The stirring-head speed of rotation is 800-1500rpm, and the linear velocity of stirring-head processing is 15-40mm/min, and whole cylinder sleeve is processed;
4. mechanical smear metal, hone obtain the cylinder sleeve part.
2. application method according to claim 1, it is characterized in that: the 3. middle stirring-head speed of rotation of described step is 1200-1500rpm, cylinder sleeve by the anchor clamps assembling rotates with the linear velocity of 35-40mm/min, stirring-head is with the speed of the 35mm/min shoulder breadth distance that moves ahead half after rotating a circle, so repeatedly, up to whole cylinder sleeve completion of processing.
3. application method according to claim 1, it is characterized in that: the 3. middle stirring-head speed of rotation of described step is 1200-1500rpm, cylinder sleeve by the anchor clamps assembling rotates with the linear velocity of 35-40mm/min, stirring-head is with the speed of the 35mm/min shoulder breadth distance that moves ahead half after rotating a circle, so repeatedly, up to whole cylinder sleeve completion of processing, simultaneously near the material water spray friction stir head is cooled off.
4. application method according to claim 1, it is characterized in that: the 3. middle stirring-head speed of rotation of described step is 800-1000rpm, cylinder sleeve by the anchor clamps assembling rotates with the linear velocity of 15-20mm/min, stirring-head was with the speed of the 15mm/min shoulder breadth distance that moves ahead half after cylinder sleeve rotated a circle, so repeatedly, up to whole cylinder sleeve completion of processing.
5. application method according to claim 1, it is characterized in that: the 3. middle stirring-head speed of rotation of described step is 1000-1200rpm, cylinder sleeve by the anchor clamps assembling rotates with the linear velocity of 25-30mm/min, cylinder sleeve rotates a circle the back stirring-head with the speed of the 25mm/min shoulder breadth distance that moves ahead half, so repeatedly, up to whole cylinder sleeve completion of processing.
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| CN2009101913459A CN101705460B (en) | 2009-11-06 | 2009-11-06 | Application method of friction stirring processing technology in high silicon-aluminium alloy cylinder sleeve |
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| CN2009101913459A CN101705460B (en) | 2009-11-06 | 2009-11-06 | Application method of friction stirring processing technology in high silicon-aluminium alloy cylinder sleeve |
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| CN101705460B true CN101705460B (en) | 2011-03-16 |
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| CN102528611A (en) * | 2010-12-24 | 2012-07-04 | 中国科学院金属研究所 | Repair method for short-process casting defects |
| CN106392460A (en) * | 2016-11-04 | 2017-02-15 | 上海航天精密机械研究所 | Defect repairing method for magnesium/aluminum alloy casting |
| JP6582096B1 (en) | 2018-05-25 | 2019-09-25 | 大豊工業株式会社 | Sliding member |
| CN115365503B (en) * | 2022-07-25 | 2023-08-01 | 西安交通大学 | Preparation method of aluminum nitride reinforced aluminum alloy cylinder sleeve |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5460317A (en) * | 1991-12-06 | 1995-10-24 | The Welding Institute | Friction welding |
| CN101338704A (en) * | 2008-08-27 | 2009-01-07 | 重庆大学 | Inner layer granule reinforced cylinder sleeve and method of manufacture |
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2009
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5460317A (en) * | 1991-12-06 | 1995-10-24 | The Welding Institute | Friction welding |
| US5460317B1 (en) * | 1991-12-06 | 1997-12-09 | Welding Inst | Friction welding |
| CN101338704A (en) * | 2008-08-27 | 2009-01-07 | 重庆大学 | Inner layer granule reinforced cylinder sleeve and method of manufacture |
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