CN103016334B - A kind of abrasion-proof concrete conveying cylinder and preparation process thereof - Google Patents
A kind of abrasion-proof concrete conveying cylinder and preparation process thereof Download PDFInfo
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- CN103016334B CN103016334B CN201210554401.2A CN201210554401A CN103016334B CN 103016334 B CN103016334 B CN 103016334B CN 201210554401 A CN201210554401 A CN 201210554401A CN 103016334 B CN103016334 B CN 103016334B
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Abstract
The present invention relates to a kind of abrasion-proof concrete conveying cylinder and preparation process thereof, comprise two end flange and cylinder body, it is characterized in that: described conveying cylinder is double layer construction, comprise cylinder body skin and internal layer, described cylinder body skin is aluminium alloy layer, and described internal layer is alumina ceramic layer.The present invention adopts differential arc oxidation preparation process, by adopting differential arc oxidation in-situ preparation one deck high hardness and the good ceramic layer of combination force on high strength alumin ium alloy surface, thus prepares the concrete conveying cylinder of light wear-resistant.Concrete conveying cylinder of the present invention has the advantages such as lightweight, intensity is high, wear resistance good, long service life, the differential arc oxidation preparation process environmental friendliness that the present invention adopts, efficiency is high, cost is low, hardness is high, wear-resisting and corrosion resistance good, evenly and surface finishment is good.
Description
Technical field
The present invention relates to a kind of concrete conveying cylinder and preparation process thereof, particularly a kind of abrasion-proof concrete conveying cylinder, by the preparation process of micro-arc oxidation process at inwall in-situ preparation one deck wear-resistant ceramic of concrete conveying cylinder cylinder body.
Technical background
Concrete conveyer is the sophisticated equipment used in modern architecture construction, occupies very important status in construction industry.Concrete conveying cylinder is the vitals that concrete conveying equipment realizes concrete conveyance function, because of during work with concrete mortar generation strong friction and easy to wear, be the easily damaged parts of concrete conveying equipment, directly affect stability and efficiency that pump truck constructs.The conveying cylinder that concrete conveying equipment uses mainly contains two effects, and one is sealing, and itself and piston form Seal cage and ensure the normal pumping of concrete energy; Two is delivering concretes, and concrete all needs to enter concrete conveying pipe by conveying cylinder and is transported to the place of specifying again.Therefore, cylinder is carried to require very high machining accuracy, higher mechanical strength, high degree of finish and fabulous wear-resisting property.
For the feature of concrete conveying cylinder, the technique generally adopted at present is the modified rear fine finishing of steel pipe, then in the chromium plating of conveying cylinder internal surface.Like this by the modified intensity and the shock resistance that ensure that conveying cylinder, fine finishing ensure that dimensional accuracy, chromium plating both ensure that certain wear-resisting property also improved surface finishment simultaneously.But this technique has some deficiency following: one is that wear-resisting property is low, the hardness of chromium coating is generally 900HV, its wear-resisting property is lower compared with wear-resistant ceramic, and owing to carrying inside wall of cylinder chrome-faced, technology difficulty is large, frequent plating network layers and basal body binding force poor, easily crack and depart from reduce further conveying cylinder working life; Two is that existing process contamination is large, and it is seriously polluted that chromium plating produces; Three is existing steel conveying cylinder quality weights, adds energy consumption and the heavy burden of concrete conveying equipment.
The preparation and application of the conveying cylinder structure material of light wear-resistant are the Strategic Demands of the high-end equipment industry of national development and energy-conserving and environment-protective material, the advantage of aluminum alloy is that abundant raw materials, density are little, specific strength is high and good processability, and its shortcoming is intensity and the low and larger friction factor of hardness ratio steel.Differential arc oxidization technique treatment process is simple, environmentally safe, and process workpiece ability is strong, can increase substantially the performance of Aluminum-aluminum alloy material, reach the perfect adaptation of second generation engineering material (metal) and third generation engineering material (pottery).The technology of aluminum alloy differential arc oxidation process mainly concentrates on apparatus design, electric source modes, electrolytic solution selection and several aspect such as proportioning and differential arc oxidation pre-process and post-process.At present, domestic and international research differential arc oxidation treatment technology a lot, the electric source modes adopted, electrolyte ratio are also varied, but be really applied to engineering actual time, especially aluminum alloy conveying cylinder process time also very undesirable, the combination property such as combination force, hardness, friction durability of product also also exists a lot of defect.
Summary of the invention
The present invention proposes a kind of novel wear resistant concrete conveying cylinder and preparation process thereof for the deficiency of existing concrete conveying cylinder, has that cylinder body is lightweight, inwall wearing layer and cylinder body be in conjunction with firm and hardness is high, the simple advantage of technique.
For realizing above object, the present invention adopts following technological scheme:
A kind of abrasion-proof concrete conveying cylinder, comprises two end flange and cylinder body, it is characterized in that: described conveying cylinder is double layer construction, comprise cylinder body skin and internal layer.
Further, described cylinder body skin is aluminium alloy layer, and described internal layer is alumina ceramic layer.
A preparation process for abrasion-proof concrete conveying cylinder, is characterized in that comprising the steps:
Step (1) cylinder blank is shaping: adopt the preliminary working of blank tubing to make cylinder blank, and carries out clout cutting and be finish-machined to carrying cylinder matrix to cylinder blank according to the process of concrete conveying cylinder;
Step (2) cylinder surface process: described conveying cylinder matrix is put into Ultrasonic Cleaners described conveying cylinder substrate work-piece surface is cleaned;
Step (3) differential arc oxidation process: conveying cylinder matrix is put into temperature and carry out differential arc oxidation 10 ~ 60min at the electrolytic solution of 25 ~ 45 DEG C, differential arc oxidation Control of Voltage is at 300 ~ 400V, and current density controls at 2 ~ 6A/dm
2, cathode material adopts corrosion resistant plate.
Further, described step (1) cylinder blank is shaping: adopt blank tubing by extruded and make cylinder blank at two ends welded flange.
Further, described step (1) cylinder blank is shaping: adopt wrought aluminium tubing that two end flange and the forging of cylinder blank one are made cylinder blank.
Further, the electrolytic solution in described step (3) comprises the Na that concentration is 3 ~ 8g/L
2siO
3, concentration is the H of 1 ~ 4g/L
3bO
3, concentration is the KOH of 0.2 ~ 2g/L.
Further, the electrolytic solution in described step (3) also comprises the NaH that concentration is 0.1 ~ 1g/L
2pO
4, concentration is the K of 0.5 ~ 3g/L
2mnO
4.
As preferably, the electrolytic solution in described step (3) comprises the Na that concentration is 3g/L
2siO
3, concentration is the H of 1g/L
3bO
3, concentration is the KOH of 0.2g/L, concentration is the NaH of 0.3g/L
2pO
4, concentration is the K of 0.5g/L
2mnO
4.
As preferably, the pH value of the electrolytic solution in described step (3) is between 8 ~ 12.
Concrete conveying cylinder of the present invention is double layer construction, and internal layer is the ceramic-lined of high hardness, and skin is lightweight non-ferrous metal, preferred high strength alumin ium alloy.By adopting micro-arc oxidation process to produce one deck high hardness and the high ceramic layer of adhesive strength on high strength alumin ium alloy surface, realize the bilayer conveying cylinder structure of conveying cylinder inner surface of cylinder block lined ceramics.Combined by differential arc oxidation preparation process between lined ceramics layer and the outer matrix of cylinder body, highdensity like this lined ceramics layer has good combination power and wear-resisting property, and there is low surface roughness, high surface finishment, can ensure that conveying cylinder has enough wear-resisting propertys and good sealability.And high strength alumin ium alloy matrix is lightweight, and can ensure that conveying cylinder has high strength and impact resistance, prevent conveying cylinder from use bursting.
Compared with prior art, this technology has following beneficial effect.
(1) wear-resisting property is high, and the ceramic layer hardness of aluminium oxide can reach more than 2000HV, and its wear-resisting property is the several times of chromium coating, far away higher than chromium coating.
(2) ceramic layer adopting micro-arc oxidation process to prepare, consistency is high, high with the adhesive strength of cylinder body, avoids chromium coating and easily comes off and problem of Cracking, greatly improves the working life of conveying cylinder.
(3) quality is light, and conveying cylinder cylinder body adopts the lightweight non-ferrous alloys such as aluminum alloy, can loss of weight 50% compared with existing conveying cylinder, reduces equipment energy consumption.
(4) differential arc oxidation adopts weakly alkaline solution, does not pollute, belongs to clean processing technology and environment protection type process for treating surface, a releasing hydrogen gas, oxygen in micro-arc oxidation process to surrounding environment, to human body and environmentally friendly.
Accompanying drawing explanation
Fig. 1 is concrete conveying cylinder structural representation.
Fig. 2 is concrete conveying cylinder cross section structure schematic diagram.
In accompanying drawing: 1-flange, 2-cylinder body, 3-outer, 4-internal layer.
Specific embodiments
Below in conjunction with specific embodiment, the present invention will be further described, not as the further restriction to claim of the present invention.
Embodiment 1
Select the high strength alumin ium alloy tubing of 7 series to be raw material, carry out following operation:
1) adopt blank tubing by being squeezed into cylinder body 2, and at two ends welded flange 1, make cylinder blank;
2) clout cutting is carried out to cylinder blank and the conveying cylinder matrix reaching process requirement is made in fine finishing;
3) described conveying cylinder matrix is put into Ultrasonic Cleaners and Ultrasonic Cleaning is carried out to conveying cylinder substrate work-piece surface;
4) electrolytic solution conveying cylinder matrix after cleaning being put into differential arc oxidation groove carries out differential arc oxidation, and differential arc oxidation voltage is 300V, and current density controls at 2A/dm
2, oxidization time is 10min, and negative electrode adopts material to be corrosion resistant plate, and in micro-arc oxidation process, the temperature of electrolytic solution remains on 25 DEG C.Microarc oxidation solution is formulated as follows: Na
2siO
3concentration is 3g/L, H
3bO
3concentration is 1g/L, KOH concentration is 0.2g/L.
As shown in Figure 2, adopt above-mentioned preparation process, concrete conveying cylinder forms the double layer construction with good combination property, and internal layer 4 is the wear-resistant ceramic of lining layer of high hardness, and outer 3 is high strength alumin ium alloy matrix.Carry the wear-resistant ceramic layer thickness of cylinder inboard wall of cylinder block can reach 150 μm in this technique, its hardness is greater than 2000HV after testing.
Embodiment 2
Select wrought aluminium tubing to be raw material, carry out following operation:
1) tubing is forged, cylinder body 2 and two ends adpting flange 1 are integrally forged, makes cylinder blank;
2) clout cutting is carried out to cylinder blank and the conveying cylinder matrix reaching process requirement is made in fine finishing;
3) described conveying cylinder matrix is put into ultrasonic washing instrument to clean conveying cylinder substrate work-piece surface;
4) electrolytic solution conveying cylinder matrix after cleaning being put into differential arc oxidation groove carries out differential arc oxidation, and differential arc oxidation voltage is 350V, and current density controls at 4A/dm
2, oxidization time is 30min, and negative electrode adopts material to be corrosion resistant plate, and in micro-arc oxidation process, the temperature of electrolytic solution remains on 30 DEG C.Microarc oxidation solution is formulated as follows: Na
2siO
3concentration 8g/L, H
3bO
3concentration 4g/L, KOH concentration 2g/L, NaH
2pO
4concentration is 0.5g/L, K
2mnO
4concentration is 1.5g/L.
Concrete conveying cylinder internal surface forms total thickness about 250 μm of ceramic membrane compacted zones after differential arc oxidation, and after testing, its hardness reaches 2500HV.
Appropriate K
2mnO
4add, the self-lubricating property of ceramic membrane can be improved, NaH
2pO
4interpolation can reduce the porosity ratio of ceramic membrane thus improve the consistency of in-situ preparation ceramic membrane, significantly promote the combination property of concrete conveying cylinder, make improve 1.5 ~ 2 times further the working life of cylinder body.
Embodiment 3
Adopt the raw material in embodiment 1 or embodiment 2 and operation, wherein in step 4), during differential arc oxidation, oxidation voltage is at 400V, and current density controls at 6A/dm
2, oxidization time is 60min, and negative electrode adopts material to be corrosion resistant plate, temperature 45 C.Electrolyte prescription adopts lower surface compositions: Na
2siO
3concentration 6g/L, H
3bO
3concentration 1.6g/L, KOH concentration 0.6g/L.Conveying cylinder internal surface forms total thickness about 150 μm of ceramic membrane compacted zones after differential arc oxidation, and after testing, its hardness reaches 1500HV.
The present invention mainly concentrates on the selection of electrolytic solution and the selection of proportioning and voltage and current density parameter.KOH as conduction liquid, due to SiO
3 2-the adsorptive power of ion pair Al is the strongest, thus can form discharge centers fastest to reaching aluminum alloy surface, promotes that differential arc oxidation carries out process, strengthens the combination force of body material and in-situ preparation ceramic layer, so select Na
2siO
3coordinate basis of formation electrolytic solution as passivator with KOH, it is also conducive to α-Al
2o
3the formation of ceramic phase, improves the hardness of ceramic layer, wear resistance and stability.BO
3 2 –ion can regulate growth rate and the growth morphology of ceramic membrane, boric acid (H
3bO
3) additive can be played simultaneously, the effect of passivator, stabilizer and modifying agent, at Na
2siO
3h is added in solution
3bO
3ceramic layer hardness can be strengthened further, increase the degree of finish of ceramic layer simultaneously, reduce friction factor.Appropriate K
2mnO
4add, the self-lubricating property of ceramic membrane can be improved, further improve its wear resistance; NaH
2pO
4interpolation can reduce the porosity ratio of ceramic membrane thus improve the consistency of in-situ preparation ceramic membrane.The pH value of solution, between 8 ~ 12, is alkalescent, and alkalescent electrolytic solution can make proper metal ion enter the lattice structure of ceramic membrane, change and adjustment rete microstructure and obtain the ceramic membrane of excellent properties.So the present invention selects KOH, Na
2siO
3, H
3bO
3, K
2mnO
4and NaH
2pO
4as Electrolytic solution, carry out solution formula research, obtain the most excellent in-situ preparation ceramic layer Al based composites, thus be used as the structural material of concrete conveying cylinder.
The foregoing is only the preferred embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every utilize specification of the present invention and accompanying drawing content to do equivalent structure or equivalent transformation; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (2)
1. produce the preparation process of abrasion-proof concrete conveying cylinder for one kind, described abrasion-proof concrete conveying cylinder comprises two end flange and cylinder body, described conveying cylinder is double layer construction, comprise cylinder body skin and internal layer, described cylinder body skin is aluminium alloy layer, described internal layer is alumina ceramic layer, described preparation process comprises the steps: that (1) cylinder blank is shaping: adopt the preliminary working of blank tubing to make cylinder blank, and carries out clout cutting and be finish-machined to carrying cylinder matrix to cylinder blank according to the process of concrete conveying cylinder; (2) cylinder surface process: described conveying cylinder matrix is put into Ultrasonic Cleaners described conveying cylinder substrate work-piece surface is cleaned; (3) differential arc oxidation process: conveying cylinder matrix is put into temperature and carry out differential arc oxidation 10 ~ 60min at the electrolytic solution of 25 ~ 45 DEG C, differential arc oxidation Control of Voltage is at 300 ~ 400V, and current density controls at 2 ~ 6A/dm
2, cathode material adopts corrosion resistant plate; It is characterized in that:
Electrolytic solution in described step (3) comprises the Na that concentration is 3 ~ 8g/L
2siO
3, concentration is the H of 1 ~ 4g/L
3bO
3, concentration is the KOH of 0.2 ~ 0.6g/L, concentration is the NaH of 0.1 ~ 1g/L
2pO
4, concentration is the K of 0.5 ~ 3g/L
2mnO
4.
2. preparation process according to claim 1, is characterized in that: the electrolytic solution in described step (3) comprises the Na that concentration is 3g/L
2siO
3, concentration is the H of 1g/L
3bO
3, concentration is the KOH of 0.2g/L, concentration is the NaH of 0.3g/L
2pO
4, concentration is the K of 0.5g/L
2mnO
4.
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| CN103016334B true CN103016334B (en) | 2016-03-23 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103451499B (en) * | 2013-08-28 | 2015-07-22 | 中联重科股份有限公司 | Light alloy, conveying pipe and preparation method thereof |
| CN105108453B (en) * | 2015-08-14 | 2017-12-05 | 广州文冲船厂有限责任公司 | A kind of manufacture craft of dredger oil cylinder seat |
| CN105525325A (en) * | 2016-01-12 | 2016-04-27 | 北京石油化工学院 | Surface treatment method for metal alloy |
| CN106545545A (en) * | 2017-01-04 | 2017-03-29 | 河海大学常州校区 | A kind of complex abrasion-proof cylinder barrel and preparation method |
| CN106678118A (en) * | 2017-01-04 | 2017-05-17 | 河海大学常州校区 | Composite abrasion-resistant cylinder barrel and preparation method |
| CN106762952A (en) * | 2017-01-04 | 2017-05-31 | 河海大学常州校区 | A kind of complex abrasion-proof cylinder barrel and preparation method |
| CN106545544A (en) * | 2017-01-04 | 2017-03-29 | 河海大学常州校区 | A kind of complex abrasion-proof cylinder barrel and preparation method |
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| CN1554807A (en) * | 2003-12-22 | 2004-12-15 | 西安理工大学 | Electrolytic solution for aluminium alloy cast piece micro arc oxidation treatment |
| CN1896335A (en) * | 2006-06-09 | 2007-01-17 | 成都市新都科鑫科技有限责任公司 | Electrolytic dissolving liquid for aluminum-alloy oxidation |
| CN102278550A (en) * | 2011-07-07 | 2011-12-14 | 长沙中联重工科技发展股份有限公司 | Concrete transporting pipe and manufacturing method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006041696A1 (en) * | 2006-09-06 | 2008-03-27 | Schneiders, Servatius | Method for producing a concrete delivery pipe |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1554807A (en) * | 2003-12-22 | 2004-12-15 | 西安理工大学 | Electrolytic solution for aluminium alloy cast piece micro arc oxidation treatment |
| CN1896335A (en) * | 2006-06-09 | 2007-01-17 | 成都市新都科鑫科技有限责任公司 | Electrolytic dissolving liquid for aluminum-alloy oxidation |
| CN102278550A (en) * | 2011-07-07 | 2011-12-14 | 长沙中联重工科技发展股份有限公司 | Concrete transporting pipe and manufacturing method thereof |
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