CN107350755B - A kind of flowmeter acieral rotary blade rapid shaping and Surface hardened layer corrosion resistant technique - Google Patents
A kind of flowmeter acieral rotary blade rapid shaping and Surface hardened layer corrosion resistant technique Download PDFInfo
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- CN107350755B CN107350755B CN201611224534.8A CN201611224534A CN107350755B CN 107350755 B CN107350755 B CN 107350755B CN 201611224534 A CN201611224534 A CN 201611224534A CN 107350755 B CN107350755 B CN 107350755B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/02—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass turbine or like blades from one piece
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Abstract
The present invention provides a kind of flowmeter acieral rotary blade rapid shaping and Surface hardened layer corrosion resistant technique, includes the following steps: using the molding acieral rotary blade of silica solution composite casting；Impeller surface making herbs into wool: it deoils including surface turn-milling cutting, ultrasonic cleaning, microetch making herbs into wool, generate transition adhesive layer, activation process；Impeller surface black: including ultrasonic cleaning deoil cleaning, corrode light, heat-tinting, closed process out.Present invention combination silica solution composite casting technology technology, acieral surface wool manufacturing technology and surface blackening technology, flowmeter acieral rotary blade can be quickly produced individually or in batches, and impeller surface hardness is high, it is wear-resisting, corrosion resistant performance is good, service life of the acieral rotary blade in flowmeter can be greatly prolonged.
Description
Technical field
The present invention relates to universal machine and fluid control devices manufacturing technology fields, and in particular to a kind of flowmeter aluminium base
Alloy rotary blade rapid shaping and Surface hardened layer corrosion resistant technique.
Background technique
Acieral is widely used in all types of industries skill since matter is soft, body is light, easy to process, and the features such as cost is relatively low
Art field.Currently, acieral is also largely used, including flowmeter shell, metering device in flowmeter production industry
Shell also includes part built-in part, such as turbine or impeller.However, most unmanageable is exactly whirlpool in flowmeter production process
Wheel or impeller, especially rotary-type impeller, are mainly manifested in following two problems: first is that since its rotary blade has rotation
Property, using aluminium base die-casting process process, it is not easy to demould, molding difficulty it is big.So generally using acieral stick, directly utilize
Numerical control processing or the molding of machining center turnning and milling.This type technique, although quality is stablized, time-consuming for single product molding, to original
Waste of material is larger.Can be generally divided into according to different size part: saw material, vehicle go out prototype, deburring of overturning, milling four steps of impeller,
Impeller is especially milled, different according to size, bigger workpiece numerical-controlled bite, stroke are bigger, and processing is time-consuming longer, processing
Difficulty is also bigger, while directly turnning and milling impeller is great on waste of material.Second is that since acieral material is soft, density
It is low, the hardness reasons such as not enough, acid, alkali, the sulfide for being easily deformed or damaging, and contain in medium under pressure medium impact
Etc. corrosivity stronger substance corrosion can be generated to acieral impeller surface, to influence service life.It therefore, be to its surface
Hardening or corrosion-resistant treatments are carried out, current processing technique substantially makes its surface form one layer firmly using plating, electrophoresis process
Change protective film, for improving its hardness property and corrosion resistance.But since acieral material is soft, the coefficient of expansion is larger,
And the impurity such as micro hydrogen, chlorine and moisture are easily generated from acieral during electroplating electrophoresis conductive heater, easily make
Electroplated layer forms pin hole point, influences its corrosion resistance.If electroplating time lengthens, pin hole point is covered, and be easy to make
The impurity such as gas are covered on formation impurity interlayer, such interlayer between electroplated layer and matrix and are generally not easy to find, but in machine
In device operational process, electroplated layer shedding is easily caused under the action of by external force, so that the corrosion of aluminum-based alloy matrix is increased,
Also there is potential impact to its surface hardness, to influence the service life of its product.Therefore, it is necessary to develop a kind of novel
Aluminum alloy junction component rapid shaping and Surface hardened layer corrosion resistant technique.
Summary of the invention
The object of the present invention is to provide a kind of flowmeter acieral rotary blade rapid shaping and Surface hardened layer corrosion resistants
Technique can be single in conjunction with silica solution composite casting technology technology, acieral surface wool manufacturing technology and surface blackening technology
Or the quick production flowmeter acieral rotary blade of batch, and impeller surface hardness is high, it is wear-resisting, corrosion resistant performance is good, it can be big
The big service life for extending acieral rotary blade in flowmeter.
To achieve the goals above, The technical solution adopted by the invention is as follows:
A kind of flowmeter acieral rotary blade rapid shaping and Surface hardened layer corrosion resistant technique, include the following steps:
1) the molding acieral rotary blade of silica solution composite casting is used:
1. aluminum dipping form makes: using eight valve Split type dies, mold inner-cavity is carved surface application outside rotary blade using turning mode
It carves and, hollow reserved location is the forming cavity of rotary blade wax pattern, and casting hole is set to die tip (as pivoting leaf wheel shaft
Core apical position), it is equipped with 1 small pressure-relief flow guide hole in eight impeller end-positions of rotary blade, outside eight petal blocks
End middle part, which is equipped with, grabs by position, and is pre-tightened eight petal block obvolvents of mold with matched quick clip.Aluminum dipping form production is pivoting leaf
The problems such as whether wax part can be good at demoulding, the deformation of wax part suppressed, aluminium is mainly reflected in for the most key step of wheel shaping
The production of mould；
2. wax pattern preparation: first opening mold, one layer of release agent is uniformly sprayed in its die cavity, then closes mold
And mold clamping is put into the pre- casting of wax injector with clip, when wax injector wax injection nozzle is directed at casting hole, casting pressure modulation is
2.0-2.5MPa, the cured temperature control system of wax injection nozzle at 56 DEG C -65 DEG C, dwell time control 40s-90s(according to workpiece size and
Fixed, the biggish dwell time is relatively long), then start to carry out casting, when wax is overflowed from the pressure-relief flow guide hole of mold, casting
Finish, by mold withdraw from placement pressure candlestick on natural cooling 30s-60s(depending on workpiece size, biggish phase cooling time
To longer), and carry out demoulding and the surface shaping of wax part, repairing, cleaning；
3. dead head design simultaneously is completed to assemble with wax pattern: diameter is less than or equal to the workpiece of 80mm, and dead head uses four groups
Arranged type Combination Design, diameter be greater than 80mm workpiece, dead head use one-piece design, dead head design and make after again with wax
Type completes assembling；It is smooth to must take into account sprue and runners in dead head design, while to calculate and emit cup and precast piece
Pressure difference, be secondly to consider that riser and grate flow channel must keep clear, prevent riser and grate flow channel from blocking, when casting makes
Show at feeling suffocated, influences casting quality；
4. shell processed: in the wax pattern sub-assembly for completing assembling with dead head, being existed using silica solution, waterglass, refractory material
Wax pattern surface makes the formwork being made of surface layer, transition zone and backing layer, and is hardened；
5. dewaxing: by the formwork after hardening, remove the capping of dead head cup upper layer, and after cleaning up around dead head,
Formwork dead head is swept away, is evenly arranged on pulling a cart, then will pull a cart to be sent into dewaxing kettle together, dewaxing kettle door is shut, is added
Be depressed into 1.6MPa, vapor (steam) temperature controls 100 DEG C -120 DEG C, pressure maintaining 40min-60min(according to formwork size and it is how many depending on,
Can be by dwell time opposite extension), it is all purified to wax in formwork, formwork is taken out in pressure release；
6. roasting casting: formwork is poured emit sweep away it is evenly distributed into roaster, maturing temperature control at 1100 DEG C -1150
DEG C, heat preservation roasting 1h or more；Temperature starts to be cooled to 400 DEG C -450 DEG C when formwork after roasting is white or rose color, and
Heat preservation cooperates casting operation after the completion of intermediate frequency furnace aluminium alloy solution deoxidization desulfuration impurity elimination, is 550 DEG C -600 DEG C by temperature
Aluminium alloy solution quickly pours into formwork that (formwork tapping temperature is cooperated with aluminium alloy solution temperature with this temperature proportional, meeting
The problems such as substantially reducing cold shut, stomata generation improves casting program rate), after the completion of casting, place cooled to room temperature；
7. being shelled, being cut, repairing of polishing, ball blast is to get molding acieral rotary blade；
2) it impeller surface making herbs into wool: deoils including surface turn-milling cutting, ultrasonic cleaning, microetch making herbs into wool, generate transition bonding
Layer, activation process；
3) impeller surface black: including ultrasonic cleaning deoil cleaning, corrode light, heat-tinting, closed process out.
According to above scheme, when the wax pattern preparation, workshop temperature is controlled at 13 DEG C -17 DEG C.
According to above scheme, when dead head design and beam combination, workshop temperature is controlled at 13 DEG C -17 DEG C.
According to above scheme, when the shell processed, workshop temperature controls 21 DEG C -27 DEG C, and the relative humidity control of surface layer room exists
Less than or equal to 65%, the relative humidity control of transition zone and backing layer room is being less than or equal to 50%.
According to above scheme, the detailed process of the impeller surface making herbs into wool are as follows:
1) surface turn-milling cutting: acieral rotary blade is placed in machining center or numerically-controlled machine tool, is rotated along impeller
Prolong and processed to position, turning thickness is not more than 0.5mm, and impeller surface is made to have metallic luster, forms micromirror；
2) ultrasonic cleaning is deoiled: the good acieral rotary blade of turnning and milling is placed in 30s- in 45 DEG C of -60 DEG C of hot water
Then 60s is pulled out, then immerse 10s-20s in 80 DEG C of -100 DEG C of clear water, is pulled out and is drained；
3) microetch making herbs into wool: the acieral rotary blade drained is put into 20s-50s in the etching solution prepared, then
It pulls out and is rinsed well with clear water, so that acieral rotary blade surface is become coarse by microetch, formation is uneven and suede
Cotton-shaped surface, such surface can be used as the attachment point of subsequent transition adhesive layer, close rotary blade so as to improve aluminium base
The bond strength with transition adhesive layer；
4) generate transition adhesive layer: it is 20%- that microetch making herbs into wool treated acieral rotary blade, which is immersed mass concentration,
25s-35s in 25% hydrazine hydrate and the potassium permanganate mixed solution of 1%-5%, is then pulled out.This way is by 20%-25%
Treated that acieral rotary blade polarizes to microetch making herbs into wool for the potassium permanganate mixed solution of hydrazine hydrate and 1%-5%, leads to
Crossing polarization reaction makes its surface form one layer of conductive oxidation film, can effectively be attached together with the cotton-shaped surface of the suede of microetch
Transition adhesive layer is formed, the transition adhesive layer that this technique is formed provides powerful bond condition for subsequent blackening, improves
The degree of adhesion of matrix and protective layer；
5) it activates: being 15s- in the ethyl alcohol of 65%-80% by the acieral rotary blade leaching mass concentration with adhesive layer
It is pulled out after 20s, as constant temperature drying in environment of the relative humidity no more than 10%, this technique is that would fit snugly within transition adhesive layer
Between impurity, gasification substance all remove, to more effectively provide powerful bond condition for subsequent blackening, raising
The adhesive strength of hardening layer of resist and matrix；
According to above scheme, the detailed process of the impeller surface nigrescence are as follows:
1) ultrasonic cleaning is deoiled cleaning: the acieral rotary blade with adhesive layer being immersed containing mass concentration is
In the alkaline solution of 2%-5%, ultrasonic cleaning 60s-100s at a temperature of 60 DEG C -65 DEG C is rushed after pulling out with 60 DEG C of -65 DEG C of clear water
Then wash clean drains.The control of ultrasonic cleaning time is very crucial, should protect front surface and deoil scavenging effect, also to guarantee
Workpiece surface caustic corrosion is uniform, while also to guarantee that workpiece surface does not play piebald；
2) corrode light out: in the NaOH solution that mass concentration is 40~50g/L, alkaline etching 60s-120s at a temperature of 60 DEG C,
To remove the natural oxide film and modified alloy layer of workpiece surface remaining, and matrix surface is adjusted, is allowed to uniformity.In order to subtract
The aluminum oxide flocculation object precipitated in few corrosion process can be used ammonium citrate (ρ=10g/L) as chelating agent, next use H2SO4
And HNO3Volumetric concentration is respectively in the pickling solution of 15~20 mL/L, 3~5 mL/L and residual alkali, while dissolving dust attachment
Object makes workpiece adhesive layer expose bright and clean active surface；
3) heat-tinting: in the Na that mass concentration is 18 g/L2CrO4The acieral for corroding light out is rotated in solution
Impeller carries out chemical oxidation and corrosion resistance oxidation substantially up to standard can be obtained in order to avoid polluting or generating new natural oxide film again
Film；To oxidation-treated acieral rotary blade black, use transistion metal compound for colorant, KMnO4For oxygen
Agent, NiSO4For catalyst, and use HNO3Adjusting pH value is 5, and conductive processing 8-10min at a temperature of 80 DEG C -90 DEG C；
4) it closes: using hydrolysis salt method, making to generate hydrogen in the established nigrescence membrane pores in acieral rotary blade surface
Oxide precipitation, by blockage of the micro orifice.It can further improve the intensity and corrosion resistance of workpiece surface through closing, while increasing gloss
Degree.
Specifically shell parameter processed is as follows for shell process processed of the invention:
It should be noted that item during shell processed: when 1, preparing surface layer, first plus silica solution, then being gradually added JFC wetting agent quality
Can be adjusted by the superiority and inferiority of the being coated with property of coating for 0.3%-0.5%() and zirconium powder be stirred uniformly, be eventually adding defoaming
Agent 0.15%-2%, by bubble how much adjustment appropriate；2, surface layer whole virgin material should stir more than for 24 hours, measure surface layer viscosity before producing,
With domestic 4#Cup measurement, should be controlled in regulation range of viscosities, silica solution surface layer drying time in 8h or more, transition zone and
Backing layer drying time is in 12h or more；3, it wants dried when being stained with transition zone, uses Mo Laisha according to helical runner intrinsic propesties
Powder is as transition coating；4, transition zone will presoak the molten silicon of silicon, can presoak 3 layers or more；5, when being stained with three layers, viscosity is adjusted, is done
It is dry it is good after use waterglass coating；6, hardening bath chlorination aluminum density being adjusted to 1.18-1.2, firm time is 1h or so, if you need to
Firm time can be extended when wanting.
The beneficial effects of the present invention are:
1) the silica solution composite casting technology that uses of the present invention, it is possible to reduce material, artificial and mach waste, effectively
Production cost is saved, meanwhile, according to silica solution composite casting technology technology, it can guarantee product turnout speed and batch production
Efficiency；
2) the impeller surface making herbs into wool technology that the present invention uses can enable aluminum alloy to form having for one layer of out-of-flatness on matrix
The adhesive layer of suede substance blacks on the adhesive layer, utilizes the mechanism and chemistry between nigrescence layer and adhesive layer
The cooperation of effect can substantially increase matrix, transition zone, the bond strength between surface layer；
3) present invention is by the preparation of impeller surface nigrescence liquid medicine, the control of implementing blackening process conditions, in aluminium base
Impeller outer layer forms one layer of plyability protective layer, after this protective layer passes through the oxide seal of blackening back segment, available tool
There is certain finish and densification, hardness height, wear-resisting property and corrosion resistance are strong, the strong fine and close hard with impeller matrix conjugation
Corrosion resistant layer can greatly prolong the service life of aluminium base rotary blade.
Specific embodiment
Technical solution of the present invention is illustrated below with reference to embodiment.
Embodiment 1:
The present invention provides a kind of flowmeter acieral rotary blade rapid shaping and Surface hardened layer corrosion resistant technique, packet
Include following steps:
1) the molding acieral rotary blade of silica solution composite casting is used:
1. aluminum dipping form makes: using eight valve Split type dies, mold inner-cavity is carved surface application outside rotary blade using turning mode
It carves and, hollow reserved location is the forming cavity of rotary blade wax pattern, and casting hole is set to die tip, at rotary blade eight
Impeller end-position is equipped with 1 small pressure-relief flow guide hole, is equipped with and is grabbed by position in the middle part of eight petal block outer ends, and with matched
Quick clip pre-tightens eight petal block obvolvents of mold.Aluminum dipping form production is that rotary blade forms the most key step, is being suppressed
Whether wax part can be good at the problems such as demoulding, the deformation of wax part, be mainly reflected in the production of aluminum dipping form；
2. wax pattern preparation: workshop temperature is controlled at 14 DEG C -16 DEG C, is first opened mold, is uniformly sprayed in its die cavity
Then mold is closed and with clip by mold clamping, the pre- casting of wax injector is put into, when wax injector wax injection nozzle pair by one layer of release agent
Quasi- casting hole, casting pressure modulation are 2.3MPa, and at 60 DEG C, the dwell time controls in 70s the cured temperature control system of wax injection nozzle, then opens
Begin to carry out casting, when wax is overflowed from the pressure-relief flow guide hole of mold, casting is finished, and mold is withdrawn from naturally cold on placement pressure candlestick
But 50s, and carry out demoulding and the surface shaping of wax part, repairing, cleaning；
3. dead head design simultaneously is completed to assemble with wax pattern: diameter is less than or equal to the workpiece of 80mm, and dead head uses four groups
Arranged type Combination Design, diameter be greater than 80mm workpiece, dead head use one-piece design, dead head design and make after again with wax
Type completes assembling；
4. shell processed: in the wax pattern sub-assembly for completing assembling with dead head, being existed using silica solution, waterglass, refractory material
Wax pattern surface makes the formwork being made of surface layer, transition zone and backing layer, and is hardened, and workshop temperature controls 24 DEG C -26 DEG C, face
The relative humidity control of floor room is 60%, and the relative humidity control of transition zone and backing layer room is 45%；
5. dewaxing: by the formwork after hardening, remove the capping of dead head cup upper layer, and after cleaning up around dead head,
Formwork dead head is swept away, is evenly arranged on pulling a cart, then will pull a cart to be sent into dewaxing kettle together, dewaxing kettle door is shut, is added
It is depressed into 1.6MPa, vapor (steam) temperature controls 110 DEG C, pressure maintaining 50min, all purifies to wax in formwork, formwork is taken out in pressure release；
6. roasting casting: formwork is poured emit sweep away it is evenly distributed into roaster, maturing temperature control at 1130 DEG C, heat preservation
Roast 2h；Temperature starts to be cooled to 430 DEG C when formwork after roasting is white or rose color, and keeps the temperature, and closes to intermediate frequency furnace aluminium
After the completion of gold solution deoxidization desulfuration impurity elimination, cooperate casting operation, the aluminium alloy solution that temperature is 580 DEG C is quickly poured into formwork
In, after the completion of casting, place cooled to room temperature；
7. being shelled, being cut, repairing of polishing, ball blast is to get molding acieral rotary blade；
2) impeller surface making herbs into wool:
1. surface turn-milling cutting: acieral rotary blade being placed in machining center or numerically-controlled machine tool, is rotated along impeller
Prolong and processed to position, turning thickness is not more than 0.5mm, and impeller surface is made to have metallic luster, forms micromirror；
2. ultrasonic cleaning is deoiled: the good acieral rotary blade of turnning and milling being placed in 50s in 50 DEG C of hot water, is then fished out
Out, then 15s in 90 DEG C of clear water is immersed, pulls out and drains；
3. microetch making herbs into wool: the acieral rotary blade drained being put into 40s in the etching solution prepared, is then pulled out
It is rinsed well with clear water；
4. generating transition adhesive layer: it is 23% that microetch making herbs into wool treated acieral rotary blade, which is immersed mass concentration,
Hydrazine hydrate and 3% potassium permanganate mixed solution in 30s, then pull out；
5. activation: being fished out after 18s in the ethyl alcohol for being 70% by the acieral rotary blade leaching mass concentration with adhesive layer
Out, constant temperature drying in the environment for being 8% as relative humidity.
3) impeller surface blacks:
The cleaning 1. ultrasonic cleaning is deoiled: it is containing mass concentration by the acieral rotary blade immersion with adhesive layer
In 3% alkaline solution, ultrasonic cleaning 80s at a temperature of 62 DEG C is rinsed well with 62 DEG C of clear water after pulling out, is then drained；
2. corroding light out: in the NaOH solution that mass concentration is 45g/L, alkaline etching 90s at a temperature of 60 DEG C, and use lemon
Sour ammonium (ρ=10g/L) is used as chelating agent, next uses H2SO4And HNO3Volumetric concentration is respectively the pickling solution of 18 mL/L, 4mL/L
Residual alkali is neutralized, while dissolving dust attachment, workpiece adhesive layer is made to expose bright and clean active surface；
3. heat-tinting: in the Na that mass concentration is 18 g/L2CrO4The acieral for corroding light out is rotated in solution
Impeller carries out chemical oxidation；To oxidation-treated acieral rotary blade black, use transistion metal compound for
Toner, KMnO4For oxidant, NiSO4For catalyst, and use HNO3Adjusting pH value is 5, and conductive processing at a temperature of 85 DEG C
10min；
4. closing: using hydrolysis salt method, making to generate hydrogen in the established nigrescence membrane pores in acieral rotary blade surface
Oxide precipitation, by blockage of the micro orifice.
The above embodiments are only used to illustrate and not limit the technical solutions of the present invention, although above-described embodiment to the present invention into
Gone detailed description, the related technical personnel of this field it is understood that can modify to the present invention or replace on an equal basis, but
Any modification and part replacement for not departing from spirit and scope of the invention should all be covered in scope of the presently claimed invention.
Claims (5)
1. a kind of flowmeter acieral rotary blade rapid shaping and Surface hardened layer corrosion resistant technique, which is characterized in that including
Following steps:
1) the molding acieral rotary blade of silica solution composite casting is used:
1. aluminum dipping form makes: using eight valve Split type dies, mold inner-cavity is carved out surface application outside rotary blade using turning mode
Come, hollow reserved location is the forming cavity of rotary blade wax pattern, and casting hole is set to die tip, in eight impellers of rotary blade
End-position is equipped with 1 small pressure-relief flow guide hole, is equipped with and is grabbed by position in the middle part of eight petal block outer ends, and with matched quick
Clip pre-tightens eight petal block obvolvents of mold, and aluminum dipping form production is that rotary blade forms the most key step, in compacting wax part
The problems such as whether can be good at demoulding, the deformation of wax part, is mainly reflected in the production of aluminum dipping form；
2. wax pattern preparation: first opening mold, one layer of release agent is uniformly sprayed in its die cavity, then mold is closed and is used in combination
Mold clamping is put into the pre- casting of wax injector by clip, and when wax injector wax injection nozzle is directed at casting hole, casting pressure modulation is 2.0-
2.5MPa, at 56 DEG C -65 DEG C, the dwell time controls in 40s-90s the cured temperature control system of wax injection nozzle, then starts to carry out casting, when
When wax is overflowed from the pressure-relief flow guide hole of mold, casting is finished, and mold is withdrawn from natural cooling 30s-60s on placement pressure candlestick, and
Carry out demoulding and the surface shaping of wax part, repairing, cleaning；
3. dead head design simultaneously is completed to assemble with wax pattern: diameter is less than or equal to the workpiece of 80mm, and dead head uses four groups of arrangements
Formula Combination Design, diameter are greater than the workpiece of 80mm, and dead head uses one-piece design, and dead head is complete with wax pattern again after designing and making
At assembling；
4. shell processed: in the wax pattern sub-assembly for completing assembling with dead head, using silica solution, waterglass, refractory material in wax pattern
Surface makes the formwork being made of surface layer, transition zone and backing layer, and is hardened；
5. dewaxing: by the formwork after hardening, removing the capping of dead head cup upper layer, and after cleaning up around dead head, by mould
Shell dead head is swept away, and is evenly arranged on pulling a cart, and then will pull a cart to be sent into dewaxing kettle together, dewaxing kettle door is shut, is forced into
1.6MPa, vapor (steam) temperature control 100 DEG C -120 DEG C, and pressure maintaining 40min-60min is all purified, pressure release to wax in formwork, by formwork
It takes out；
6. roasting casting: formwork is poured emit sweep away it is evenly distributed into roaster, maturing temperature control at 1100 DEG C -1150 DEG C,
Heat preservation roasting 1h or more；Temperature starts to be cooled to 400 DEG C -450 DEG C when formwork after roasting is white or rose color, and protects
Temperature cooperates casting operation after the completion of intermediate frequency furnace aluminium alloy solution deoxidization desulfuration impurity elimination, the aluminium for being 550 DEG C -600 DEG C by temperature
Alloy solution quickly pours into formwork, after the completion of casting, places cooled to room temperature；
7. being shelled, being cut, repairing of polishing, ball blast is to get molding acieral rotary blade；
2) it impeller surface making herbs into wool: deoils including surface turn-milling cutting, ultrasonic cleaning, microetch making herbs into wool, generate transition adhesive layer, work
Change process；
3) impeller surface black: including ultrasonic cleaning deoil cleaning, corrode light, heat-tinting, closed process out；
The detailed process of the impeller surface making herbs into wool are as follows:
1) surface turn-milling cutting: being placed in machining center or numerically-controlled machine tool for acieral rotary blade, along impeller rotation prolong to
Position processing, turning thickness are not more than 0.5mm, and impeller surface is made to have metallic luster, form micromirror；
2) ultrasonic cleaning is deoiled: the good acieral rotary blade of turnning and milling being placed in 30s-60s in 45 DEG C of -60 DEG C of hot water, so
After pull out, then immerse 10s-20s in 80 DEG C of -100 DEG C of clear water, pull out and drain；
3) microetch making herbs into wool: the acieral rotary blade drained is put into 20s-50s in the etching solution prepared, is then pulled out
It is rinsed well with clear water；
4) generate transition adhesive layer: it is 20%- that microetch making herbs into wool treated acieral rotary blade, which is immersed mass concentration,
25s-35s in 25% hydrazine hydrate and the potassium permanganate mixed solution of 1%-5%, is then pulled out；
5) it activates: being 15s-20s in the ethyl alcohol of 65%-80% by the acieral rotary blade leaching mass concentration with adhesive layer
After pull out, as relative humidity no more than 10% environment in constant temperature drying.
2. flowmeter according to claim 1 acieral rotary blade rapid shaping and Surface hardened layer corrosion resistant technique,
It is characterized in that, workshop temperature is controlled at 13 DEG C -17 DEG C when the wax pattern preparation.
3. flowmeter according to claim 1 acieral rotary blade rapid shaping and Surface hardened layer corrosion resistant technique,
It is characterized in that, workshop temperature is controlled at 13 DEG C -17 DEG C when the dead head design and beam combination.
4. flowmeter according to claim 1 acieral rotary blade rapid shaping and Surface hardened layer corrosion resistant technique,
It is characterized in that, workshop temperature controls 21 DEG C -27 DEG C, and the relative humidity control of surface layer room is being less than or equal to when the shell processed
65%, the relative humidity control of transition zone and backing layer room is being less than or equal to 50%.
5. flowmeter according to claim 1 acieral rotary blade rapid shaping and Surface hardened layer corrosion resistant technique,
It is characterized in that, the detailed process that the impeller surface blacks are as follows:
1) ultrasonic cleaning is deoiled cleaning: it is 2%- that the acieral rotary blade with adhesive layer, which is immersed containing mass concentration,
In 5% alkaline solution, ultrasonic cleaning 60s-100s at a temperature of 60 DEG C -65 DEG C is rinsed after pulling out with 60 DEG C of -65 DEG C of clear water
Completely, it then drains；
2) corrode light out: in the NaOH solution that mass concentration is 40~50g/L, alkaline etching 60s-120s at a temperature of 60 DEG C；
3) heat-tinting: in the Na that mass concentration is 18g/L2CrO4To corrode in solution the acieral rotary blade of light out into
Row chemical oxidation；To oxidation-treated acieral rotary blade black, use transistion metal compound for colorant,
KMnO4For oxidant, NiSO4For catalyst, and use HNO3Adjusting pH value is 5, and conductive processing 8- at a temperature of 80 DEG C -90 DEG C
10min；
4) it closes: using hydrolysis salt method, making to generate hydroxide in the established nigrescence membrane pores in acieral rotary blade surface
Object precipitating, by blockage of the micro orifice.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611224534.8A CN107350755B (en) | 2016-12-27 | 2016-12-27 | A kind of flowmeter acieral rotary blade rapid shaping and Surface hardened layer corrosion resistant technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611224534.8A CN107350755B (en) | 2016-12-27 | 2016-12-27 | A kind of flowmeter acieral rotary blade rapid shaping and Surface hardened layer corrosion resistant technique |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107350755A CN107350755A (en) | 2017-11-17 |
| CN107350755B true CN107350755B (en) | 2019-08-16 |
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| CN201611224534.8A Active CN107350755B (en) | 2016-12-27 | 2016-12-27 | A kind of flowmeter acieral rotary blade rapid shaping and Surface hardened layer corrosion resistant technique |
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| EP0745469A1 (en) * | 1995-05-31 | 1996-12-04 | Robert Bosch Gmbh | Apparatus for manufacturing a rotationally symmetrical moulded element |
| CN103170581A (en) * | 2011-12-22 | 2013-06-26 | 杭州恒力泵业制造有限公司 | Corrosion-resistant impeller casting process |
| CN103433435A (en) * | 2013-08-13 | 2013-12-11 | 苏州欧拉工程技术有限公司 | Manufacturing process of overall titanium alloy impeller |
| CN103782041A (en) * | 2011-06-21 | 2014-05-07 | 诺沃皮尼奥内有限公司 | Composite compressor impeller with an erosion resistant coating and methods of manufacturing |
| CN105290400A (en) * | 2015-10-29 | 2016-02-03 | 江苏恒尚动力高科有限公司 | Rapid manufacturing method for turbocharger impeller |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0745469A1 (en) * | 1995-05-31 | 1996-12-04 | Robert Bosch Gmbh | Apparatus for manufacturing a rotationally symmetrical moulded element |
| CN103782041A (en) * | 2011-06-21 | 2014-05-07 | 诺沃皮尼奥内有限公司 | Composite compressor impeller with an erosion resistant coating and methods of manufacturing |
| CN103170581A (en) * | 2011-12-22 | 2013-06-26 | 杭州恒力泵业制造有限公司 | Corrosion-resistant impeller casting process |
| CN103433435A (en) * | 2013-08-13 | 2013-12-11 | 苏州欧拉工程技术有限公司 | Manufacturing process of overall titanium alloy impeller |
| CN105290400A (en) * | 2015-10-29 | 2016-02-03 | 江苏恒尚动力高科有限公司 | Rapid manufacturing method for turbocharger impeller |
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