CN1603450A - Flame spray welding process for titanium alloy surface wearable coating - Google Patents
Flame spray welding process for titanium alloy surface wearable coating Download PDFInfo
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- CN1603450A CN1603450A CNA2004100652139A CN200410065213A CN1603450A CN 1603450 A CN1603450 A CN 1603450A CN A2004100652139 A CNA2004100652139 A CN A2004100652139A CN 200410065213 A CN200410065213 A CN 200410065213A CN 1603450 A CN1603450 A CN 1603450A
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Abstract
One kind of titanium alloy surface wear-resisting coating flame spurts welds the technique, this craft through increases the surface in the superficial pretreatment craft to soak the zinc activation working procedure, and gater two into one, the surface decontamination working procedure with it; Simultaneously had reasonably determined in the technological process essential parameter, is concrete is: Treats spurts the surface roughness is Ra25~~12.5, the preheating temperature is 230~~270deg.C, when heavy melt the liquid state resident time is 20~~60S; And after spurts welds carries on 'to it the tempering' heat treatment, the heat treatment temperature range is 200~~600deg.C, guarantees the wet time is 0.5~~2H and so on a series of crafts measure, successfully brings to completion in the titanium alloy surface preparation gathers the performance fine flame to spurt welds the wear-resisting coating, better solution project practice implementation flexible question.
Description
Technical field
The present invention relates to metallic surface thermospray (weldering) technical field, refer in particular to a kind of flame spray welding process of titanium alloy surface wearable coating.
Background technology
Titanium alloy has that specific tenacity height, erosion resistance are strong, favorable manufacturability and biocompatibility, is one of employed major metal material in the military field such as aerospace always.Along with titanium alloy turns to going deep into of civilian process from military, titanium alloy has shown huge application potential in fields such as boats and ships ocean, derived energy chemical, Vehicle Engineering, biological medicines, and has become one of novel process in these fields, new technology, the indispensable metallic substance of new equipment.Hardness is low, frictional coefficient is big but it also exists, and the relatively poor grade of wear resistance is not enough, seriously affects its use properties, is limiting its further application.Therefore, requiring to have in the application of wear resistance, titanium alloy only just is being used after the surface friction scholarship and moral conduct is through improving.
Make a general survey of the development of the wear-resisting modification technology of titanium alloy surface, roughly experienced three phases: the one, be the conventional surface technological phase of representative with plating, thermodiffusion and thermospray, the surface reforming layer that the technology in this stage obtained exists mostly that modified layer is thin, bonding strength is low and matrix is damaged the deficiency of serious (as hydrogen embrittlement, oxygen crisp etc.), and especially its use properties is difficult to guarantee under the high-mechanic condition; The 2nd, with the three beams be representative and with the laser melting and coating technique be sign represent the surface technology stage, the technology in this stage still is that the coating bonding properties all has very big advantage from preparation technology, but ubiquity limitation such as cost is higher, handiness is relatively poor, has largely limited it to transform to engineering practice; Three is integrated application stages of two kinds and kinds of surface technology, as depth-hardened technology, thermospray+laser melting coating etc., though the prepared every performance index of wear-resistant coating of these technology increase, the engineering adaptability problem i.e. handiness and the economy of this technology is not well solved yet.
The flame spray welding technology is a kind of sophisticated surface modification treatment technology, has energy-conservation, inexpensive, efficient, the coating that obtains reliably and very strong engineering adaptability, be widely used in having obtained great economic benefit and social benefit during the surface modification treatment of multiple material and surface make again; The self-fluxing alloyed powder that is suitable for flame spray welding simultaneously is again a kind of widely used coated material with good wear-resisting erosion resistance heat resistance.But on titanium alloy surface, do not appear in the newspapers as yet by the research that the surfacing self-fluxing alloyed powder prepares wear-resistant coating about adopting the flame spray welding technology, cause the major cause of above-mentioned situation as follows: (1) titanium alloy surface activity is higher, very strong with the avidity of oxygen, and the B in the self-fluxing alloyed powder, Si element can't reduce it, in implementing the flame spray welding process, be difficult to obtain the clean surface, therefore it is generally acknowledged to be not suitable for adopting the flame spray welding technology to carry out surface modification on the titanium alloy substrate; (2) temperature is higher and the spray-welding coating speed of cooling is very fast in the flame spray welding process, and the alloying element diffusion can not fully be carried out, and unrelieved stress is bigger, has weakened the bonding strength between titanium alloy substrate and the coating, is difficult to obtain the good binding performance.
Summary of the invention
The flame spray welding process that the purpose of this invention is to provide a kind of titanium alloy surface wearable coating, this technology not only can the reliable wear-resistant coatings of obtained performance, and have bigger handiness and good economy.
The technical scheme that realizes the object of the invention is:
Employing " two step method " spray welding process promptly sprays powdered alloy earlier on matrix surface and then to its remelting, its general technological process is: purification-alligatoring-preheating-spray protective layer-second-heating-spraying powdered alloy-remelting sprayed coating-slow cooling; It is characterized in that:
1. workpiece surface pretreatment technology
At first adopt sandblast, mechanical cutting or other method of roughening to make the roughness on surface to be painted reach Ra25～12.5, guarantee the flowability of wettability of the surface and coating alloy; Adopt the organic washing agent that workpiece is cleaned then, and place it in etch in the solution of hydrochloric acid, nitric acid, hydrofluoric acid and distilled water preparation, the activation solution of preparing with hydrofluoric acid, 30～50g/L, six water zinc sulphates and the distilled water of 25～55ml/L activates it at last, covered by lead zinc film fully to workpiece surface, take out and clean up with flowing water.
2. spray welding process
When implementing surfacing, will be preheating to 230～270 ℃ through pretreated workpiece after spraying protective layer, second-heating and spray powdered alloy then; immediately carry out remelting; after " minute surface is reflective " appears in coating alloy, make coating alloy under liquid state, stop 20～60s, slow cooling is to room temperature then.
3. postweld heat treatment technology
Behind the surfacing workpiece is carried out " tempering " thermal treatment, Heating temperature is 200～600 ℃, soaking time 0.5～2h.The invention has the beneficial effects as follows:
1. the present invention is on the basis of general technology process, improved the workpiece surface pretreatment technology, increase the surface and soaked the zinc activation procedure, and conventional surface cleaning operation and activation procedure united two into one, on the basis that does not increase cost substantially, make titanium alloy workpiece to be painted obtain the clean surface, thereby get ready for implementing surfacing.
2. the present invention increases matrix and coating interalloy elemental diffusion by rationally determining the key process parameter in the surfacing process, makes it to form the excellent metallurgical combination.
3. the present invention carries out tempering heat treatment after adopting surfacing, reduces unrelieved stress, and the stable coatings tissue further improves the over-all properties of wear-resistant coating.
The present invention adopts above-mentioned technology to prepare wear-resistant coating in conjunction with excellent property on titanium alloy surface, and be embodied in: spray-welding coating is the abrasion-resistant tissues with tough matrix+hard phase, and surface hardness is up to HV
0.3850～1250, be 3～4 times of titanium alloy of being untreated, wear resistance has improved 10～18 times (they are index with the wear weight loss); The tissue of matrix/be coated with interlayer transition layer presents by the plane crystalline substance and changes column crystal, dentrite and equiax crystal successively into, coating and matrix form tangible metallurgical binding, Ti element in the matrix is fully diffusion on whole square section, and be diffused into the coating top layer always, microhardness distributes at upper edge, square section layer depth and has gradually changeable and continuity, and matrix and coating have good bonding properties.
Description of drawings
The present invention is further described below in conjunction with accompanying drawing.
Fig. 1 is the tissue topography in the coating interface district of embodiment 1 preparation
Fig. 2 is the tissue topography of the coating spray-welding coating of embodiment 1 preparation
Fig. 3 is the tissue topography in the coating interface district of embodiment 2 preparations.
Fig. 4 is the tissue topography of the coating spray-welding coating of embodiment 2 preparations
Fig. 5 is the tissue topography in the coating interface district of embodiment 3 preparations
Fig. 6 is the tissue topography of the coating spray-welding coating of embodiment 3 preparations
Embodiment:
The specific embodiment of the present invention is:
Embodiment 1. carries out the sandblast alligatoring with workpiece surface, make the roughness on surface to be painted reach Ra25, used the acetone ultrasonic cleaning then 3～5 minutes, put into solution etch, be placed on subsequently and be activated to workpiece surface in the activation solution of 30ml/L hydrofluoric acid, 30g/L six water zinc sulphates and covered by lead zinc film fully with hydrochloric acid, nitric acid, hydrofluoric acid and distilled water preparation; Spraying protective layer, second-heating, spraying powdered alloy after will being preheating to 230 ℃ through pretreated workpiece, laying equal stress on melts and sprays coating control coating alloy and stopped 20 seconds under liquid state, and slow cooling is to room temperature then; It is reheated 200 ℃ again, be incubated 30 minutes, carry out " tempering " thermal treatment.
Adopt the interface region of wear-resistant coating of above-mentioned prepared and spray-welding coating tissue topography as shown in Figure 1, 2, matrix shows as excellent metallurgical with coating and combines, and spray-welding coating is organized as Ni based solid solution+hard phases such as black carbide, and its surface hardness is HV
0.3929.8, carrying out wearing test with GCr15 (hardness HRC61), its wear weight loss is only for being untreated 1/10 of titanium alloy.
Embodiment 2. carries out the sandblast alligatoring with workpiece surface, make the roughness on surface to be painted reach Ra25, used the acetone ultrasonic cleaning then 3～5 minutes, put into solution etch, be placed on subsequently and be activated to workpiece surface in the activation solution of 45ml/L hydrofluoric acid, 40g/L six water zinc sulphates and covered by lead zinc film fully with hydrochloric acid, nitric acid, hydrofluoric acid and distilled water preparation; Spraying protective layer, second-heating, spraying powdered alloy after will being preheating to 250 ℃ through pretreated workpiece, laying equal stress on melts and sprays coating control coating alloy and stopped 40 seconds under liquid state, and slow cooling is to room temperature then; It is reheated 400 ℃ again, be incubated 60 minutes, carry out " tempering " thermal treatment.
Adopt the interface region of wear-resistant coating of above-mentioned prepared and spray-welding coating tissue topography shown in Fig. 3,4, matrix shows as excellent metallurgical with coating and combines, and spray-welding coating is organized as Ni based solid solution+hard phases such as black carbide, and its surface hardness is HV
0.3975.1, carrying out wearing test with GCr15 (hardness HRC61), its wear weight loss is only for being untreated 1/14 of titanium alloy.
Embodiment 3. workpiece surface end face cutting threads, make the roughness on surface to be painted reach Ra12.5, used the acetone ultrasonic cleaning then 3～5 minutes, put into solution etch, be placed on subsequently and be activated to workpiece surface in the activation solution of 55ml/L hydrofluoric acid, 50g/L six water zinc sulphates and covered by lead zinc film fully with hydrochloric acid, nitric acid, hydrofluoric acid and distilled water preparation; Spraying protective layer, second-heating, spraying powdered alloy after will being preheating to 270 ℃ through pretreated workpiece, laying equal stress on melts and sprays coating control coating alloy and stopped 60 seconds under liquid state, and slow cooling is to room temperature then; It is reheated 600 ℃ again, be incubated 120 minutes, carry out " tempering " thermal treatment.
Adopt the interface region of wear-resistant coating of above-mentioned prepared and spray-welding coating tissue topography shown in Fig. 5,6, matrix shows as excellent metallurgical with coating and combines, and spray-welding coating is organized as Ni based solid solution+hard phases such as black carbide, and its surface hardness is HV
0.31222.2, carrying out wearing test with GCr15 (hardness HRC61), its wear weight loss is only for being untreated 1/18 of titanium alloy.
Claims (3)
1. the flame spray welding process of titanium alloy surface wearable coating adopts " two step method " spray welding process, and specific embodiment is: purification-alligatoring-preheating-spray protective layer-second-heating-spraying powdered alloy-remelting sprayed coating-slow cooling; It is characterized in that: at first adopt sandblast, mechanical cutting or other method of roughening that the roughness on surface to be painted is reached after Ra25～12.5, guarantee the flowability of wettability of the surface and coating alloy; Adopt the organic washing agent that workpiece is cleaned then, and place it in etch in the solution of hydrochloric acid, nitric acid, hydrofluoric acid and distilled water preparation, the activation solution of preparing with hydrofluoric acid, 30～50g/L, six water zinc sulphates and the distilled water of 25～55ml/L activates it at last, covered by lead zinc film fully to workpiece surface, take out and clean up with flowing water.
2. titanium alloy surface wearable coating flame spray welding process according to claim 1; it is characterized in that when implementing surfacing; sprayed protection powder after will being preheating to 230～270 ℃ through pretreated workpiece; second-heating and spray powdered alloy then; immediately carry out remelting; after " minute surface is reflective " appears in coating alloy, make coating alloy under liquid state, stop 20～60s, slow cooling is to room temperature then.
3. titanium alloy surface wearable coating flame spray welding process according to claim 1 is characterized in that adopting thermal treatment process to carry out " tempering " under 200～600 ℃ behind the surfacing, and soaking time is 0.5～2h.
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| CNB2004100652139A CN1313635C (en) | 2004-11-02 | 2004-11-02 | Flame spray welding process for titanium alloy surface wearable coating |
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| CNB2004100652139A CN1313635C (en) | 2004-11-02 | 2004-11-02 | Flame spray welding process for titanium alloy surface wearable coating |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100338254C (en) * | 2006-04-12 | 2007-09-19 | 华北电力大学 | In-situ preparation method of ultra-fine grained metal carbide ceramic coating |
| CN101786193A (en) * | 2010-03-22 | 2010-07-28 | 天津市富赛克阀门有限公司 | Method for spray-welding anisotropic material on cast iron valve plate |
| CN101693986B (en) * | 2009-10-19 | 2011-01-05 | 江苏大学 | Process for preparing compact thick protection layers on magnesium alloy surfaces |
| CN102286718A (en) * | 2010-06-17 | 2011-12-21 | 上海宝钢设备检修有限公司 | Method for improving bond strength of thermal spraying coating layer and metal substrate |
| CN102506002A (en) * | 2012-01-01 | 2012-06-20 | 白山发电厂 | Cavitation-resistant water turbine blade and thermal spraying method |
| CN104985277A (en) * | 2015-05-26 | 2015-10-21 | 扬中市第一蝶阀厂有限公司 | Surfacing technology for sealing surface of cast steel valve member |
| CN104988452A (en) * | 2015-06-02 | 2015-10-21 | 合肥东方节能科技股份有限公司 | Manufacturing method of wear-resisting lining plate for rolling mill inlet guide |
| CN105382418A (en) * | 2015-12-23 | 2016-03-09 | 江苏启澜激光科技有限公司 | Laser marking machine |
| CN106435440A (en) * | 2016-09-12 | 2017-02-22 | 江苏大学 | Method for spraying and fusing iron-based or cobalt-based wearable alloy layer on titanium alloy surface through plasma |
| CN110444384A (en) * | 2019-08-08 | 2019-11-12 | 安徽大地熊新材料股份有限公司 | A kind of neodymium iron boron magnetic body surface flam spray-welding layer and preparation method thereof |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3318999A1 (en) * | 1983-05-25 | 1984-11-29 | M.A.N. Maschinenfabrik Augsburg-Nürnberg AG, 8000 München | COATED METAL OBJECT AND METHOD FOR THE PRODUCTION THEREOF |
| JPS61195962A (en) * | 1985-02-26 | 1986-08-30 | Teikoku Piston Ring Co Ltd | Abrasive wear-resisting member |
| ES2213788T3 (en) * | 1996-06-25 | 2004-09-01 | Mec Holding Gmbh | MATERIAL IN THE FORM OF POWDER OR WIRE FOR COATING, AS WELL AS CORRESPONDING PROCEDURE. |
| CN1125196C (en) * | 1999-09-28 | 2003-10-22 | 香港生产力促进局 | Surface activating process of Ti and Ti alloy for bright electroplating |
| CN1209484C (en) * | 2003-09-25 | 2005-07-06 | 昆明理工大学 | Hard ceramic coating of polynary oxide and its prepn and application |
-
2004
- 2004-11-02 CN CNB2004100652139A patent/CN1313635C/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100338254C (en) * | 2006-04-12 | 2007-09-19 | 华北电力大学 | In-situ preparation method of ultra-fine grained metal carbide ceramic coating |
| CN101693986B (en) * | 2009-10-19 | 2011-01-05 | 江苏大学 | Process for preparing compact thick protection layers on magnesium alloy surfaces |
| CN101786193A (en) * | 2010-03-22 | 2010-07-28 | 天津市富赛克阀门有限公司 | Method for spray-welding anisotropic material on cast iron valve plate |
| CN102286718A (en) * | 2010-06-17 | 2011-12-21 | 上海宝钢设备检修有限公司 | Method for improving bond strength of thermal spraying coating layer and metal substrate |
| CN102506002A (en) * | 2012-01-01 | 2012-06-20 | 白山发电厂 | Cavitation-resistant water turbine blade and thermal spraying method |
| CN102506002B (en) * | 2012-01-01 | 2014-09-24 | 白山发电厂 | Cavitation-resistant water turbine blade and thermal spraying method |
| CN104985277A (en) * | 2015-05-26 | 2015-10-21 | 扬中市第一蝶阀厂有限公司 | Surfacing technology for sealing surface of cast steel valve member |
| CN104988452A (en) * | 2015-06-02 | 2015-10-21 | 合肥东方节能科技股份有限公司 | Manufacturing method of wear-resisting lining plate for rolling mill inlet guide |
| CN105382418A (en) * | 2015-12-23 | 2016-03-09 | 江苏启澜激光科技有限公司 | Laser marking machine |
| CN106435440A (en) * | 2016-09-12 | 2017-02-22 | 江苏大学 | Method for spraying and fusing iron-based or cobalt-based wearable alloy layer on titanium alloy surface through plasma |
| CN106435440B (en) * | 2016-09-12 | 2018-10-09 | 江苏大学 | In the method for titanium alloy surface plasma spraying iron-based or cobalt-based wear-resistant alloy layer |
| CN110444384A (en) * | 2019-08-08 | 2019-11-12 | 安徽大地熊新材料股份有限公司 | A kind of neodymium iron boron magnetic body surface flam spray-welding layer and preparation method thereof |
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| CN1313635C (en) | 2007-05-02 |
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Assignee: Jiangsu Yinhuan Steel Tube Co., Ltd. Assignor: Jiangsu University Contract fulfillment period: 2004.11.22 to 2012.11.22 contract change Contract record no.: 2008320000381 Denomination of invention: Flame spray welding process for titanium alloy surface wearable coating Granted publication date: 20070502 License type: Exclusive license Record date: 2008.9.25 |
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Free format text: EXCLUSIVE LICENCE; TIME LIMIT OF IMPLEMENTING CONTACT: 2004.11.22 TO 2012.11.22 Name of requester: JIANGSU YINHUAN PRECISION STEEL TUBE CO., LTD. Effective date: 20080925 |
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Granted publication date: 20070502 Termination date: 20131102 |