CN104726820A - Method for quickly preparing aluminum-iron alloy coating on surface of metal material - Google Patents
Method for quickly preparing aluminum-iron alloy coating on surface of metal material Download PDFInfo
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- CN104726820A CN104726820A CN201510045510.5A CN201510045510A CN104726820A CN 104726820 A CN104726820 A CN 104726820A CN 201510045510 A CN201510045510 A CN 201510045510A CN 104726820 A CN104726820 A CN 104726820A
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Abstract
The invention discloses a method for quickly preparing an aluminum-iron alloy coating on the surface of a metal material. According to the method, compound powder, medium balls and a to-be-treated workpiece are put into a sealed roller, and the sealed roller is put into an aluminized furnace for heating at the same time. The roller is connected with a turntable at one side by virtue of a flange, and then is connected with a gear motor by virtue of a bearing, and the gear motor rotates at different speeds to provide different rotating speeds for the roller. The surface of the to-be-treated workpiece is subjected to impact and friction by using the rolling of the medium balls and the compound powder in the sealed roller, and by virtue of the combination of heat energy, mechanical impact and mechanical friction, a sufficient quantity of spare spaces required by atomic diffusion are generated on the surface of the workpiece, and a mechanical energy aided diffusion aluminum alloy coating is formed at 400-600 DEG C. The method disclosed by the invention has the advantages that compared with the conventional metal process, the activation energy of diffusion and the diffusing permeation temperature are reduced, the diffusing permeation time is shortened, the production efficiency is improved, and the energy conservation and consumption reduction are significant.
Description
Technical field
The present invention relates to material surface technical field, be specifically related to a kind of mechanical energy that utilizes and prepare the method for ferroaluminium coating fast at metal material surface.
Background technology
Pack aluminizing adopts the method adding thermodiffusion, and active aluminum atom is spread at metal material surface, forms surfaces of aluminum iron alloy coating.In order to produce active aluminum atom and make active aluminum atom form ferroaluminium coating to intrinsic silicon diffusion, certain thermodynamics and kinetics condition must be met.Traditional powder aluminizing cementation forms active aluminum atom by single heat energy, and to intrinsic silicon diffusion, form ferroaluminium coating.Usual Heating temperature is at about 1000 DEG C, and soaking time is several hours even tens hours, and not only Heating temperature is high, soaking time is long, and power consumption is large, and workpiece easily produces thermal distortion, limits the application of conventional powder aluminising.
Chinese patent literature " mechanical energy diffusion-assistant technique for modifying metal surface (CN1320717A) " is improved on the basis of traditional Permeation into Steels through Powder Medium smithcraft, provides a kind of rolling type mechanical and can help the technology of oozing.Its method is under 400 ~ 600 DEG C of conditions, the cylinder that penetration enhancer and workpiece are housed is rotated with the rotating speed of 3 ~ 60 revs/min in process furnace, the penetration enhancer particle of motion is utilized to rub to workpiece surface and clash into, workpiece surface is made to produce the active atomic of sufficient amount and the room required for atomic diffusion, realize mechanical energy metallic cementation surface modification, can be used for mechanical energy aided diffusion aluminium, siliconising, ooze copper, ooze manganese and zinc-aluminized.But because drum rotational speed is slow, peening particle is little, and the shock effect of generation is little, and the vacancy defect formed at pending workpiece surface is few, and diffusion activation energy reduces not obvious, and its action effect is limited, can not produce disperse nano-oxide alloy coat.
Chinese patent application " method (CN1584102A) of alloy coat is prepared in a kind of acceleration " provides one and produces shock effect at metal material surface in conjunction with mechanical energy vibration, prepares the method for alloy coat.The method utilizes the medium ball in closed container to clash into compound powder and workpiece surface, and make the generation viscous deformation of compound powder powder particle and pulverizing, particle and surperficial pinning bond and form adhesion layer.Under the effect of heat energy, there is catalyst decomposes, activated metal powder particle and piece surface, the physical and chemical processes such as the diffusion-sintering of adhesion layer and matrix simultaneously, thus form the alloy coat of disperse oxide at workpiece surface.But because this oscillatory type mechanical energy aided diffusion equipment shock effect is uncontrollable, the impact direction of medium ball does not have rule, and shock effect is larger, easily makes the adhesion layer that formed and alloy coat cracking, comes off, workpiece coatingsurface after process is coarse, and following process is more difficult.In addition, this processing method can only process miniature workpiece, limits its application to a certain extent.
Summary of the invention
The object of this invention is to provide a kind of method preparing ferroaluminium coating at metal material surface fast, heat energy is combined with mechanical shock and mechanical friction, multiple physical and chemical processes such as absorption, diffusion, reaction are carried out simultaneously, thus forms ferroaluminium coating.This method not only overcomes that Heating temperature in traditional alumetizing process is high, and the shortcomings such as soaking time is long, and energy consumption is large, also compensate for small-particle shock action weak, and action effect is limited to be waited not enough, can prevent alloy coat from ftractureing, coming off.
The present invention is achieved like this, a kind of method preparing ferroaluminium coating at metal material surface fast, and its characterization method step is as follows:
(1) in sealed cylinder, first load medium ball, pending workpiece and compound powder, sealed cylinder is connected with the rotating disk of side by flange, then is connected with mechanical energy device by transmission shaft, sealed cylinder is placed heating in aluminizing furnace and carries out aluminising;
(2) reducing motor in mechanical energy device rotates with different rates, thus gives sealed cylinder different rotating speeds, makes heat energy and mechanical energy act on sealed cylinder simultaneously;
(3) circulating rolling of medium ball in sealed cylinder and compound powder is utilized, carry out impacting and rubbing in surface to workpiece to be handled, by the combination of heat energy and mechanical shock, mechanical friction, make workpiece surface produce room needed for the active atomic of sufficient amount and atomic diffusion, realize mechanical energy aided diffusion aluminium.
The weight percent of compound powder of the present invention and medium ball consists of: compound powder is 50 ~ 100wt%, and medium ball is 0 ~ 50wt%.
Medium ball of the present invention and the compound powder loadings in sealed cylinder is 54 ~ 98% of closed container space, and pending workpiece can be fixed in closed cylinder, also can freely place.
Compound powder of the present invention forms by for aluminium agent, weighting agent, three kinds, activator; Supply aluminium agent to be aluminium powder, weighting agent is iron aluminium powder, and activator is made up of the one of aluminum chloride or ammonium chloride.
The composition proportion of compound powder of the present invention is by weight percentage: aluminium powder 20 ~ 40wt%, iron aluminium powder 50 ~ 80wt%, activator 0 ~ 10wt%, and powder granularity is 100 ~ 200 orders.Preferred, in compound powder, in iron aluminium powder, the weight percent of aluminium content is 51.39%.
Medium ball diameter of the present invention is between 1 ~ 10mm diameter, and medium ball can adopt one in the alloy ball of different diameter or Ceramic Balls or two kinds of mix and match.
Aluminising temperature of the present invention is 400 ~ 600 DEG C, soaking time 0 ~ 5h, and drum rotational speed is 0 ~ 50r/min.
Diameter of cylinder in aluminizing furnace of the present invention is respectively 100mm, 200mm, 300mm, is highly 100mm.
Feature of the present invention is, is combined by heat energy with mechanical shock and mechanical friction, makes medium ball and compound powder be interacting at workpiece surface, will produce following effect by cylinder circulating rolling:
1, change heat transfer type, mainly change particle contact heat transfer into by conductive heat transfer by traditional, add heat transfer rate, obviously shorten heating and transparent burning time, also improve temperature homogeneity in cylinder simultaneously.
2, the ball action of medium ball generation, makes powder particle generation viscous deformation and the pulverizing of compound powder, fully contacts with workpiece.The shock action that medium ball produces, makes the powder particle of a part of compound powder be bonded in workpiece surface and forms adhesion layer.
3, medium ball and compound powder particle rub to workpiece surface and impact, and make workpiece surface produce the defect such as sufficient active atomic and the required room of diffusion, thus reduce diffusion activation energy.
Accompanying drawing explanation
The filling sealed roller frame schematic diagram of Fig. 1 medium ball of the present invention, compound powder, pending workpiece.
Fig. 2 coat-thickness of the present invention and aluminising time curve (matrix AM355 stainless steel, 550 DEG C).
Fig. 3 AM355 stainless steel calorized coating of the present invention cross section (550 DEG C, 5h).
Fig. 4 is the calorized coating surface topography map that AM355 stainless steel base is formed at 500 DEG C of insulation 5h.
In FIG, 1 is medium ball, and 2 is pending workpiece, and 3 is compound powder, and 4 is sealed cylinder, and 5 is aluminizing furnace, and 6 is rotating disk, and 7 is transmission shaft.
Embodiment
Embodiment 1
Shown in Fig. 1, by medium ball 1, pending workpiece 2, compound powder 3 is mixed together and is placed in sealed cylinder 4, sealed cylinder 4 is put into aluminizing furnace 5 simultaneously and heats.Sealed cylinder 4 is connected with the rotating disk 6 of side by flange, then is connected with mechanical energy device by transmission shaft 7, places in aluminizing furnace 5 and heats.Treatment process and result:
The main component (weight percent) of compound powder is 30wt% aluminium powder, iron aluminium powder 68wt%, ammonium chloride 2wt%, and aluminium powder and iron aluminum powder particle size are 100 orders, and ammonium chloride granularity is 200 orders.The loadings of compound powder in sealed cylinder is 72% of sealed cylinder space.Compound powder and body material are inserted in sealed cylinder, aluminizing furnace is put into after being sealed by cylinder, open mechanical energy device to cylinder with certain rotational speed, compound powder and body material in cylinder are fully mixed, close mechanical energy device after several minutes, 550 DEG C are warming up to aluminizing furnace, open mechanical energy device, drum rotational speed is adjusted to 5r/min, takes out air cooling after being incubated 0.5h, 1h, 2h, 5h respectively.
AM355 stainless steel base surface after above-mentioned process can form the aluminized coating that thickness is 10 ~ 37 μm, and infiltration layer is mainly Fe
4al
13phase and FeAl
3phase.The relation of aluminized coating thickness and soaking time when Fig. 2 is 550 DEG C.From figure below, aluminising 0.5h just can form in the stainless steel-based surface of AM355 the aluminized coating that thickness is 10 μm, and the thickness of the aluminized coating of aluminising 5h can reach 37 μm.After mechanical energy aided diffusion aluminium, aluminising temperature and time reduces all greatly.Fig. 3 is the calorized coating Cross Section Morphology figure that AM355 stainless steel base is formed at 550 DEG C of insulation 5h, and coating uniform is fine and close, is combined well with matrix.
Embodiment 2
Treatment process and result:
The main component (weight percent) of compound powder is 30wt% aluminium powder, and iron aluminium powder 65wt%, ammonium chloride 5wt%, aluminium powder, iron aluminium powder and ammonium chloride granularity are 200 orders.The weight percent of compound powder and Ceramic Balls (diameter is 4mm) is respectively 70wt% and 30wt%, and the loadings in sealed cylinder is 72% of sealed cylinder space.Compound powder, Ceramic Balls and body material are inserted in sealed cylinder, aluminizing furnace is put into after being sealed by cylinder, open mechanical energy device to cylinder with certain rotational speed, compound powder in cylinder, Ceramic Balls and body material are fully mixed, close mechanical energy device after several minutes, 500 DEG C are warming up to aluminizing furnace, open mechanical energy device, drum rotational speed is adjusted to 20r/min, takes out air cooling after insulation 5h.
The AM355 stainless steel base surface obtained can form the aluminized coating that thickness is 19 μm.Fig. 4 is the calorized coating surface topography map that AM355 stainless steel base is formed at 500 DEG C of insulation 5h, and aluminized coating surface produces grey ferro-aluminum phase particle and the thin spherical alumina particle of a small amount of white of rough continuity.Particle size dispersion is uneven, and arrangement has no visible trend.
Embodiment 3
Treatment process and result:
The main component (weight percent) of compound powder is 30wt% aluminium powder, iron aluminium powder 68wt%, ammonium chloride 2wt%, and aluminium powder and iron aluminum powder particle size are 100 orders, and ammonium chloride granularity is 200 orders.The loadings of compound powder in sealed cylinder is 85% of sealed cylinder space.Compound powder and pending workpiece are inserted in sealed cylinder, aluminizing furnace is put into after being sealed by cylinder, open mechanical energy device to cylinder with certain rotational speed, compound powder in cylinder, medium ball and workpiece for seep are fully mixed, close mechanical energy device after several minutes, 550 DEG C are warming up to aluminizing furnace, open mechanical energy device, drum rotational speed is adjusted to 50r/min, takes out air cooling after insulation 5h.
The AM355 stainless steel base surface obtained can form the aluminized coating that thickness is 33 μm, and coating uniform is fine and close, is combined well with matrix.
Claims (9)
1. prepare a method for ferroaluminium coating fast at metal material surface, its characterization method step is as follows:
(1) in sealed cylinder, first load medium ball, pending workpiece and compound powder, sealed cylinder is placed heating in aluminizing furnace and carry out aluminising;
Sealed cylinder is connected with the rotating disk of side by flange, then is connected with mechanical energy device by transmission shaft;
(2) reducing motor in mechanical energy device rotates with different rates, thus gives sealed cylinder different rotating speeds, makes heat energy and mechanical energy act on sealed cylinder simultaneously;
(3) circulating rolling of medium ball in sealed cylinder and compound powder is utilized, carry out impacting and rubbing in surface to workpiece to be handled, by the combination of heat energy and mechanical shock, mechanical friction, make workpiece surface produce room needed for the active atomic of sufficient amount and atomic diffusion, realize mechanical energy aided diffusion aluminium.
2. a kind of method preparing ferroaluminium coating at metal material surface fast according to claim 1: the weight percent of described compound powder and medium ball consists of: compound powder is 50 ~ 100wt%, and medium ball is 0 ~ 50wt%.
3. a kind of method preparing ferroaluminium coating at metal material surface fast according to claim 1: described medium ball and the compound powder loadings in sealed cylinder is 55 ~ 100% of sealed vessel space, pending workpiece can be fixed in sealed cylinder, also can freely place.
4. a kind of method preparing ferroaluminium coating at metal material surface fast according to claim 1: described compound powder forms by for aluminium agent, weighting agent, three kinds, activator; Supply aluminium agent to be aluminium powder, weighting agent is iron aluminium powder, and activator is made up of the one of aluminum chloride or ammonium chloride.
5. a kind of method preparing ferroaluminium coating at metal material surface fast according to claim 1: the composition proportion of described compound powder is by weight percentage: aluminium powder 20 ~ 40wt%, iron aluminium powder 50 ~ 80wt%, activator 0 ~ 10wt%, powder granularity is 100 ~ 200 orders.
6. a kind of method preparing ferroaluminium coating at metal material surface fast according to claim 1 or 5: in described compound powder, in iron aluminium powder, the weight percent of aluminium content is 51.39%.
7. a kind of method preparing ferroaluminium coating at metal material surface fast according to claim 1: described medium ball diameter is between 1 ~ 10mm diameter, and medium ball can adopt one in the alloy ball of different diameter or Ceramic Balls or two kinds of mix and match.
8. a kind of method preparing ferroaluminium coating at metal material surface fast according to claim 1: described aluminising temperature is 400 ~ 600 DEG C, soaking time 0 ~ 5h, and drum rotational speed is 0 ~ 50r/min.
9. a kind of method preparing ferroaluminium coating at metal material surface fast according to claim 1: the diameter of cylinder in described aluminizing furnace is respectively 100mm, 200mm, 300mm, is highly 100mm.
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| CN201510045510.5A CN104726820A (en) | 2015-01-29 | 2015-01-29 | Method for quickly preparing aluminum-iron alloy coating on surface of metal material |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110354694A (en) * | 2019-08-16 | 2019-10-22 | 广州赛隆增材制造有限责任公司 | A kind of activated sintering preparation method of metal composite porous membrane tube |
| CN113881915A (en) * | 2021-10-12 | 2022-01-04 | 西南大学 | Preparation method and preparation device of torsion coating |
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| JPS5518573A (en) * | 1978-07-28 | 1980-02-08 | Hitachi Ltd | Diffusion-covering method for al on heat resistant alloy surface |
| CN1320717A (en) * | 2001-02-28 | 2001-11-07 | 山东大学 | Mechanical energy diffusion-assistant technique for modifying metal surface |
| CN101565810A (en) * | 2009-06-09 | 2009-10-28 | 天津大学 | Preparation method and device for industrial microwave heating diffusion coating |
| CN201520799U (en) * | 2009-08-18 | 2010-07-07 | 杭州浙锚预应力有限公司 | Multicomponent penetration heating device |
| CN102021511A (en) * | 2011-01-09 | 2011-04-20 | 南昌航空大学 | Low-temperature powder embedding aluminum-rich penetrating agent for stainless steel |
| CN103266298A (en) * | 2013-06-04 | 2013-08-28 | 南昌航空大学 | Stainless steel low-temperature powder embedding iron-aluminum co-cementation agent and pack-cementation process method |
| CN103436839A (en) * | 2013-08-15 | 2013-12-11 | 南昌航空大学 | Rotary drum mechanical energy aided diffusing box type resistance furnace |
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2015
- 2015-01-29 CN CN201510045510.5A patent/CN104726820A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5518573A (en) * | 1978-07-28 | 1980-02-08 | Hitachi Ltd | Diffusion-covering method for al on heat resistant alloy surface |
| CN1320717A (en) * | 2001-02-28 | 2001-11-07 | 山东大学 | Mechanical energy diffusion-assistant technique for modifying metal surface |
| CN101565810A (en) * | 2009-06-09 | 2009-10-28 | 天津大学 | Preparation method and device for industrial microwave heating diffusion coating |
| CN201520799U (en) * | 2009-08-18 | 2010-07-07 | 杭州浙锚预应力有限公司 | Multicomponent penetration heating device |
| CN102021511A (en) * | 2011-01-09 | 2011-04-20 | 南昌航空大学 | Low-temperature powder embedding aluminum-rich penetrating agent for stainless steel |
| CN103266298A (en) * | 2013-06-04 | 2013-08-28 | 南昌航空大学 | Stainless steel low-temperature powder embedding iron-aluminum co-cementation agent and pack-cementation process method |
| CN103436839A (en) * | 2013-08-15 | 2013-12-11 | 南昌航空大学 | Rotary drum mechanical energy aided diffusing box type resistance furnace |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110354694A (en) * | 2019-08-16 | 2019-10-22 | 广州赛隆增材制造有限责任公司 | A kind of activated sintering preparation method of metal composite porous membrane tube |
| CN110354694B (en) * | 2019-08-16 | 2022-03-08 | 广州赛隆增材制造有限责任公司 | Activation sintering preparation method of metal composite porous membrane tube |
| CN113881915A (en) * | 2021-10-12 | 2022-01-04 | 西南大学 | Preparation method and preparation device of torsion coating |
| CN113881915B (en) * | 2021-10-12 | 2023-11-17 | 西南大学 | Preparation method and preparation device of torsion coating |
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