CN105522146A - Air compressor shell of turbocharger and manufacturing method of air compressor shell - Google Patents
Air compressor shell of turbocharger and manufacturing method of air compressor shell Download PDFInfo
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- CN105522146A CN105522146A CN201510989747.9A CN201510989747A CN105522146A CN 105522146 A CN105522146 A CN 105522146A CN 201510989747 A CN201510989747 A CN 201510989747A CN 105522146 A CN105522146 A CN 105522146A
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- compressor housings
- turbocharger
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- air compressor
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- 238000004519 manufacturing process Methods 0.000 title abstract 3
- 239000000843 powder Substances 0.000 claims abstract description 60
- 238000010438 heat treatment Methods 0.000 claims abstract description 26
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 19
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000010936 titanium Substances 0.000 claims abstract description 16
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 16
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 14
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims abstract description 13
- 238000005245 sintering Methods 0.000 claims abstract description 13
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000000227 grinding Methods 0.000 claims abstract description 11
- 239000005011 phenolic resin Substances 0.000 claims abstract description 10
- 229920001568 phenolic resin Polymers 0.000 claims abstract description 10
- 238000001816 cooling Methods 0.000 claims abstract description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 6
- OMZSGWSJDCOLKM-UHFFFAOYSA-N copper(II) sulfide Chemical compound [S-2].[Cu+2] OMZSGWSJDCOLKM-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims description 32
- 235000013339 cereals Nutrition 0.000 claims description 20
- 238000002360 preparation method Methods 0.000 claims description 19
- 239000004411 aluminium Substances 0.000 claims description 13
- 229910052782 aluminium Inorganic materials 0.000 claims description 13
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 12
- 239000003595 mist Substances 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 10
- 238000010792 warming Methods 0.000 claims description 9
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 8
- 238000005056 compaction Methods 0.000 claims description 7
- 235000013312 flour Nutrition 0.000 claims description 6
- 239000000377 silicon dioxide Substances 0.000 claims description 6
- 229910052799 carbon Inorganic materials 0.000 claims description 5
- 239000000428 dust Substances 0.000 claims description 4
- 238000000498 ball milling Methods 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 238000010891 electric arc Methods 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 238000005260 corrosion Methods 0.000 abstract description 9
- 230000007797 corrosion Effects 0.000 abstract description 9
- 239000000956 alloy Substances 0.000 abstract description 4
- 239000002994 raw material Substances 0.000 abstract description 4
- 238000012545 processing Methods 0.000 abstract description 3
- 239000011863 silicon-based powder Substances 0.000 abstract description 3
- 238000000465 moulding Methods 0.000 abstract description 2
- 230000003647 oxidation Effects 0.000 abstract description 2
- 238000007254 oxidation reaction Methods 0.000 abstract description 2
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 abstract 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 abstract 1
- 238000005299 abrasion Methods 0.000 abstract 1
- 238000001035 drying Methods 0.000 abstract 1
- 238000002156 mixing Methods 0.000 abstract 1
- 229910052594 sapphire Inorganic materials 0.000 abstract 1
- 238000005303 weighing Methods 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 12
- 239000000047 product Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 5
- 239000013078 crystal Substances 0.000 description 4
- 229910052759 nickel Inorganic materials 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000002131 composite material Substances 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 230000011218 segmentation Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000004506 ultrasonic cleaning Methods 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000003026 anti-oxygenic effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001914 calming effect Effects 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- B22F1/0003—
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/05—Metallic powder characterised by the size or surface area of the particles
- B22F1/052—Metallic powder characterised by the size or surface area of the particles characterised by a mixture of particles of different sizes or by the particle size distribution
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/02—Compacting only
- B22F3/04—Compacting only by applying fluid pressure, e.g. by cold isostatic pressing [CIP]
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/1003—Use of special medium during sintering, e.g. sintering aid
- B22F3/1007—Atmosphere
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/1017—Multiple heating or additional steps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/12—Both compacting and sintering
- B22F3/14—Both compacting and sintering simultaneously
- B22F3/15—Hot isostatic pressing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
- B22F5/10—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of articles with cavities or holes, not otherwise provided for in the preceding subgroups
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/02—Alloys based on aluminium with silicon as the next major constituent
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C30/00—Alloys containing less than 50% by weight of each constituent
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
- C22C32/0005—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with at least one oxide and at least one of carbides, nitrides, borides or silicides as the main non-metallic constituents
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
- C22C32/0084—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ carbon or graphite as the main non-metallic constituent
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
- C22C32/0089—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with other, not previously mentioned inorganic compounds as the main non-metallic constituent, e.g. sulfides, glass
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
- B22F2998/10—Processes characterised by the sequence of their steps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy
Abstract
The invention relates to an air compressor shell of a turbocharger and belongs to the technical field of an alloy material. The air compressor shell comprises the following components in parts by weight: 5-15 parts of alpha-Al2O3 micro-powder, 40-60 parts of aluminum powder, 3-8 parts of silicon powder, 5-30 parts of (Nb, Ti) C powder, 0.5-2 parts of nickel powder and 2-6 parts of cobalt powder; the air compressor shell can also comprise 3-8 parts of copper sulfide and 6-15 parts of carbon powder. The invention specifically discloses the manufacturing method of the air compressor shell. The manufacturing method comprises the following steps: weighing raw material powder; mixing, grinding and drying by taking absolute ethyl alcohol as a medium; adding phenolic resin into the raw material powder; performing hot isostatic pressure molding to obtain a blank; firstly heating the blank from room temperature to 200 DEG C under the protection of nitrogen, secondly heating to the temperature of 280 to 320 DEG C, thirdly heating to the temperature of 1340 to 1400 DEG C, fourthly performing hot isostatic pressure sintering at the temperature of 1320 to 1380 DEG C at a condition that the pressure of the nitrogen is 20MPa to 50MPa, fifthly cooling to the temperature of 1050 DEG C and finally cooling with a furnace to obtain a finished product. The air compressor shell disclosed by the invention is improved in comprehensive performances and is particularly improved in high temperature resistance, oxidation resistance, hardness, corrosion resistance, abrasion resistance and plastic deformation resistance at high temperature; meanwhile, the processing performance of the air compressor shell is guaranteed.
Description
Technical field
The present invention relates to a kind of turbocharger, be specifically related to a kind of compressor housings of turbocharger, belong to technical field of alloy material.
Background technology
Turbocharger is actually a kind of air compressor, increases air inflow by compressed air.It is utilize engine to discharge waste gas inertia impulsive force to promote the turbine in turbine room, turbine drives again coaxial impeller, the air that impeller force feed is sent here by air filter pipeline, makes it supercharging and enters cylinder.When engine speed increases, the waste gas velocity of discharge and secondary speed also synchronously increase, impeller just compresses more air and enters cylinder, the pressure of air and density increase the more fuel that can burn, the rotating speed of corresponding increase fuel quantity and adjustment engine, just can increase the power output of engine.
From structure, turbocharger mainly comprises compressor, intermediate, turbine casing three parts.Turbine casing is exactly the place that engine exhaust promotes turbine acting, compressor is the place of impeller to air inlet acting pressurization, and intermediate is for connecting turbine casing and compressor, and intermediate plays effect that is fixing and loading parts of bearings, meanwhile, the coolant flow channel of turbocharger is also in intermediate.
The main load bearing component of compressor is housing, and the turbocharger of band by-passing valve is provided with actuator, compressor is connected with actuator by sebific duct, pressurization gas corresponding in compressor housings is transported in actuator through sebific duct, in prior art, be not only compressor housings structural design unreasonable, charge flow rate is little, and compressor housings material is also more common alloy material, not only wearability is general, corrosion resistance is also poor.
Summary of the invention
The object of this invention is to provide a kind of good combination property, especially there is compressor housings that is high temperature resistant, corrosion-resistant, sludge proof turbocharger.
Above-mentioned purpose of the present invention is achieved through the following technical solutions: a kind of compressor housings of turbocharger, and described housing comprises following component and parts by weight thereof: α-Al
2o
3micro mist: 5-15 part, aluminium powder: 40-60 part, silica flour: 3-8 part, (Nb, Ti) C powder: 5-30 part, nickel powder: 0.5-2 part, cobalt powder: 2-6 part.
The compressor housings of turbocharger of the present invention is made up of the composite of hard phase and metal alloy bond phase composition, the high rigidity of existing ceramic material, there is again the obdurability of metal material, and also there is high temperature resistant, resistance to oxidation and the performance such as corrosion-resistant preferably.
The present invention not only adds α-Al in aluminium powder base material
2o
3micro mist and Si, also add (Nb, Ti) C powder, nickel powder, cobalt powder etc.Wherein α-Al
2o
3micro mist and Si add, and inventive shell is at high temperature reacted with carbon internal heat atmosphere, and produced in situ non-oxidized substance, as the wild phase of carbide and nitride, affects microstructural change, and then improves the mechanical behavior under high temperature of housing.And along with the increase of cobalt powder content, the hardness of case material rises gradually, when adding cobalt powder more than 6 parts, not only very limited on the impact of compressor housings hardness, can reduce the density and hardness of housing on the contrary.In prior art in carbide alloy and ceramic-metallic composite, generally can add the nickel powder of high level, but the corrosion resistance of nickel is poor, always first be corroded under equivalent environment, along with caking property nickel is corroded, skeleton avalanche, whole material all will lose efficacy, therefore, the present invention greatly reduces nickel content, and with the addition of fabulous (Nb, Ti) C powder of antioxygenic property and other raw materials, not only reduce the corrosion that nickel powder causes, but improve corrosion resistance and the oxidative resistance of housing.
In the compressor housings of above-mentioned turbocharger, described aluminium powder Surface coating has thickness to be the SiO of 4nm-15nm
2nanometer film.The present invention selects resistant to elevated temperatures SiO
2be coated on aluminium powder surface, increased substantially the temperature tolerance of aluminium powder, and there is heat insulation, flame retardant effect, there is effect that is transparent, blast simultaneously, and, good dispersion good with other COMPONENTS COMPATIBILITY.
In the compressor housings of above-mentioned turbocharger, described α-Al
2o
3the average grain diameter of micro mist is 2.5-4.5 μm, and the average grain diameter of aluminium powder is 5-20 μm, and the average grain diameter of silica flour is 5-20 μm, (Nb, Ti) average grain diameter of C powder is 1-5 μm, and the average grain diameter of nickel powder is 4-10 μm, and the average grain diameter of cobalt powder is 5-8 μm.The granularity of each component is different, makes small particle powder energy mix with bulky grain powder thus the gap between bulky grain powder is occupied by small particle powder, and to improve the apparent density of powder, when making product compressing, the density of product and intensity all increase.And in follow-up sintering, time initial, porosity and pore-size reduce, density increases, stress concentration degree reduces, and intensity increases, and later lasting temperature retention time does not have a significant effect to density, but structure is but in generation essential change, and the collective recrystallization of crystal grain will have a huge impact intensity.Crystal grain is larger, larger containing defective possibility, then the intensity of case material is lower, and therefore in the application's compressor housings, the particle diameter of each component all strictly controls by constantly testing.
In the compressor housings of above-mentioned turbocharger, as preferably, Nb is solidly soluted in TiC for adopting electric arc melting method by described (Nb, Ti) C powder, and the mass ratio of TiC and Nb is 7-9:1.
In the compressor housings of above-mentioned turbocharger, described housing also comprises 3-8 part copper sulfide and 6-15 part carbon dust.
As preferably, described housing comprises following component and parts by weight thereof: α-Al
2o
3micro mist: 5-12 part, aluminium powder: 45-55 part, silica flour: 4-8 part, (Nb, Ti) C powder: 10-20 part, nickel powder: 0.8-1.5 part, cobalt powder: 2.5-5 part, copper sulfide: 4-8 part, carbon dust: 8-12 part.
The invention also discloses a kind of preparation method of compressor housings of turbocharger, described preparation method comprises the steps:
S1, take material powder by above-mentioned parts by weight, make medium with absolute ethyl alcohol, mix grinding 12-22h in ball mill, then dry;
S2, in dried material powder, add phenolic resins, under the pressure of 220-260MPa, carry out cold isostatic compaction, obtain compressor housings blank;
S3, compressor housings blank is first risen to 200 DEG C from room temperature under nitrogen protection carry out the pre-heat treatment; then 280-320 DEG C is risen to the heating rate of 0.5-0.6 DEG C/min; 1340-1400 DEG C is warming up to again with the heating rate of 8-10 DEG C/min; then HIP sintering 40-60min under 1320-1380 DEG C and 20-50MPa condition of nitrogen gas; 1050 DEG C are cooled to subsequently with the speed of 6-8 DEG C/min; then with stove cooling, the compressor housings finished product of turbocharger is obtained.
The present invention obtains compressor housings blank by powder metallurgical technique by shaping for rational for compatibility material powder, then Nitrizing Treatment is carried out by stage intensification, first carry out the pre-heat treatment at 200 DEG C, then be warming up in the process of 280-320 DEG C reach exhaust and get rid of organic effect, 1340-1400 DEG C is warming up to again with the heating rate of 8-10 DEG C/min, sinter under 1320-1380 DEG C and 20-50MPa condition of nitrogen gas, along with the rising of sintering temperature, the density of compressor housings blank increases, be conducive to product rearrangement wherein and densified at a higher temperature, improve the density and hardness of compressor housings, and crystal grain is more tiny.
On the other hand, the material combination of the compressor housings of turbocharger of the present invention is unique, after the Nitrizing Treatment under high pressure, the rich nitrogen of about 15 μm, the hardened layer of rich titanium is defined at surface of shell, the obvious refinement of its surf zone crystal grain, and below cementation zone, generate the transition zone that the bonding phase content of one deck is higher, hard phase content is lower, increase substantially the plasticity_resistant deformation ability under the hardness of compressor casing surface, wear resistance and high temperature.
In the preparation method of the compressor housings of above-mentioned turbocharger, ball milling agent during mix grinding in step S1: absolute ethyl alcohol: material is 6:2:1.
In the preparation method of the compressor housings of above-mentioned turbocharger, the addition of step S2 phenolic resins accounts for the 5-12% of material powder gross weight.
In the preparation method of the compressor housings of above-mentioned turbocharger, after step S2 before step S3 (namely before Nitrizing Treatment) also can first carry out rubbing down, deoil, the pretreatment such as Ultrasonic Cleaning.
Compared with prior art, the present invention has following beneficial effect: in the component of the compressor housings of turbocharger of the present invention, is being not only with the addition of α-Al in matrix component with aluminium powder
2o
3micro mist and Si powder, also add (Nb, Ti) other components such as C powder, nickel powder, cobalt powder, compatibility is reasonable, and pass through Nitrizing Treatment and the sintering processes of subsequent stages segmentation, increase substantially the combination property of compressor housings, especially improved the plasticity_resistant deformation ability under the heat-resisting quantity of compressor housings, hardness, corrosion resistance, wear resistance and high temperature, ensure its processing characteristics simultaneously.Compressor housings of the present invention is applied in turbocharger, significantly improves the combination property of turbocharger, extend the service life of turbocharger.
Detailed description of the invention
Be below specific embodiments of the invention, technical scheme of the present invention is further described, but the present invention is not limited to these embodiments.
Table 1: the component of the compressor housings of turbocharger and parts by weight thereof and average grain diameter in embodiment 1-5
Embodiment 1
The compressor housings of the turbocharger in the present embodiment is obtained by following preparation method:
Take material powder by the parts by weight described in table 1 embodiment 1 and average grain diameter, make medium with absolute ethyl alcohol, mix grinding 16h in ball mill, then dry;
In dried material powder, add the phenolic resins accounting for material powder gross weight 8%, then under the pressure of 240MPa, carry out cold isostatic compaction, obtain compressor housings blank;
Compressor housings blank is risen to 200 DEG C from room temperature and carries out the pre-heat treatment, 300 DEG C are risen to again with the heating rate of 0.55 DEG C/min, 1370 DEG C are warming up to again with the heating rate of 9 DEG C/min, then HIP sintering 50min under 1350 DEG C and 30MPa condition of nitrogen gas, 1050 DEG C are cooled to subsequently with the speed of 7 DEG C/min, then with stove cooling, the compressor housings finished product of turbocharger is obtained.
Embodiment 2
The compressor housings of the turbocharger in the present embodiment is obtained by following preparation method:
Take material powder by the parts by weight described in table 1 embodiment 2 and average grain diameter, make medium with absolute ethyl alcohol, mix grinding 14h in ball mill, then dry;
In dried material powder, add the phenolic resins accounting for material powder gross weight 10%, then under the pressure of 230MPa, carry out cold isostatic compaction, obtain compressor housings blank;
Compressor housings blank is risen to 200 DEG C from room temperature and carries out the pre-heat treatment, 290 DEG C are risen to again with the heating rate of 0.52 DEG C/min, 1360 DEG C are warming up to again with the heating rate of 8.5 DEG C/min, then HIP sintering 55min under 1340 DEG C and 25MPa condition of nitrogen gas, 1050 DEG C are cooled to subsequently with the speed of 6.5 DEG C/min, then with stove cooling, the compressor housings finished product of turbocharger is obtained.
Embodiment 3
The compressor housings of the turbocharger in the present embodiment is obtained by following preparation method:
Take material powder by the parts by weight described in table 1 embodiment 3 and average grain diameter, make medium with absolute ethyl alcohol, mix grinding 20h in ball mill, then dry;
In dried material powder, add the phenolic resins accounting for material powder gross weight 6%, then under the pressure of 250MPa, carry out cold isostatic compaction, obtain compressor housings blank;
Compressor housings blank is risen to 200 DEG C from room temperature and carries out the pre-heat treatment, 310 DEG C are risen to again with the heating rate of 0.58 DEG C/min, 1390 DEG C are warming up to again with the heating rate of 9.5 DEG C/min, then HIP sintering 45min under 1370 DEG C and 40MPa condition of nitrogen gas, 1050 DEG C are cooled to subsequently with the speed of 7.5 DEG C/min, then with stove cooling, the compressor housings finished product of turbocharger is obtained.
Embodiment 4
The compressor housings of the turbocharger in the present embodiment is obtained by following preparation method:
Take material powder by the parts by weight described in table 1 embodiment 4 and average grain diameter, make medium with absolute ethyl alcohol, mix grinding 22h in ball mill, then dry;
In dried material powder, add the phenolic resins accounting for material powder gross weight 5%, then under the pressure of 260MPa, carry out cold isostatic compaction, obtain compressor housings blank;
Compressor housings blank is risen to 200 DEG C from room temperature and carries out the pre-heat treatment, 280 DEG C are risen to again with the heating rate of 0.5 DEG C/min, 1340 DEG C are warming up to again with the heating rate of 8 DEG C/min, then HIP sintering 60min under 1320 DEG C and 20MPa condition of nitrogen gas, 1050 DEG C are cooled to subsequently with the speed of 6 DEG C/min, then with stove cooling, the compressor housings finished product of turbocharger is obtained.
Embodiment 5
The compressor housings of the turbocharger in the present embodiment is obtained by following preparation method:
Take material powder by the parts by weight described in table 1 embodiment 5 and average grain diameter, make medium with absolute ethyl alcohol, mix grinding 12h in ball mill, then dry;
In dried material powder, add the phenolic resins accounting for material powder gross weight 12%, then under the pressure of 220MPa, carry out cold isostatic compaction, obtain compressor housings blank;
Compressor housings blank first carried out rubbing down, deoil, Ultrasonic Cleaning process, then rise to 200 DEG C from room temperature and carry out the pre-heat treatment, 320 DEG C are risen to again with the heating rate of 0.6 DEG C/min, 1400 DEG C are warming up to again with the heating rate of 10 DEG C/min, then HIP sintering 40min under 1380 DEG C and 50MPa condition of nitrogen gas, be cooled to 1050 DEG C with the speed of 8 DEG C/min subsequently, then with stove cooling, obtain the compressor housings finished product of turbocharger.
Comparative example 1
The compressor housings of the turbocharger that common commercially available aluminium alloy is made in prior art.
Comparative example 2
Raw material described in table 1 embodiment 1 is obtained the compressor housings of turbocharger by common moulding process, namely do not adopt stage nitrogenize, sintering processes described in embodiment 1.
Comparative example 3
Distinctive points is only in this comparative example 3 not containing α-Al compared with embodiment 1
2o
3micro mist, and the compressor housings being obtained turbocharger by preparation method as described in Example 1.
Comparative example 4
Distinctive points is only not containing (Nb, Ti) C powder in this comparative example 4 compared with embodiment 1, and is obtained the compressor housings of turbocharger by preparation method as described in Example 1.
Comparative example 5
Distinctive points is only not containing cobalt powder in this comparative example 5 compared with embodiment 1, and is obtained the compressor housings of turbocharger by preparation method as described in Example 1.
Comparative example 6
Distinctive points is only not containing nickel powder in this comparative example 6 compared with embodiment 1, and is obtained the compressor housings of turbocharger by preparation method as described in Example 1.
In the above-described embodiments, Nb is solidly soluted in TiC for adopting electric arc melting method by (Nb, Ti) described in material powder C powder, and the mass ratio of TiC and Nb is 7-9:1; Ball milling agent during mix grinding: absolute ethyl alcohol: material is 6:2:1.
The compressor housings of turbocharger obtained in embodiment 1-5 and comparative example 1-6 is carried out performance test, and test result is as shown in table 2.Calming the anger of turbocharger obtained in table 2: embodiment of the present invention 1-5 and comparative example 1-6
The performance comparison result of engine housing
In sum, the compressor housings of turbocharger of the present invention is being not only with the addition of α-Al in matrix component with aluminium powder
2o
3micro mist and Si powder, also add (Nb, Ti) other components such as C powder, nickel powder, cobalt powder, compatibility is reasonable, and pass through Nitrizing Treatment and the sintering processes of subsequent stages segmentation, increase substantially the combination property of compressor housings, especially improved the plasticity_resistant deformation ability under the heat-resisting quantity of compressor housings, oxidative resistance, hardness, corrosion resistance, wear resistance and high temperature, ensure its processing characteristics simultaneously.Compressor housings of the present invention is applied in turbocharger, significantly improves the combination property of turbocharger, extend the service life of turbocharger.
Specific embodiment described herein is only to the explanation for example of the present invention's spirit.Those skilled in the art can make various amendment or supplement or adopt similar mode to substitute to described specific embodiment, but can't depart from spirit of the present invention or surmount the scope that appended claims defines.
Claims (9)
1. a compressor housings for turbocharger, is characterized in that, described compressor housings comprises following component and parts by weight thereof: α-Al
2o
3micro mist: 5-15 part, aluminium powder: 40-60 part, silica flour: 3-8 part, (Nb, Ti) C powder: 5-30 part, nickel powder: 0.5-2 part, cobalt powder: 2-6 part.
2. the compressor housings of turbocharger according to claim 1, is characterized in that, described aluminium powder Surface coating has thickness to be the SiO of 4nm-15nm
2nanometer film.
3. the compressor housings of turbocharger according to claim 1, is characterized in that, described α-Al
2o
3the average grain diameter of micro mist is 2.5-4.5 μm, and the average grain diameter of aluminium powder is 5-20 μm, and the average grain diameter of silica flour is 5-20 μm, (Nb, Ti) average grain diameter of C powder is 1-5 μm, and the average grain diameter of nickel powder is 4-10 μm, and the average grain diameter of cobalt powder is 5-8 μm.
4. the compressor housings of the turbocharger according to claim 1 or 3, is characterized in that, Nb is solidly soluted in TiC for adopting electric arc melting method by described (Nb, Ti) C powder, and the mass ratio of TiC and Nb is 7-9:1.
5. the compressor housings of turbocharger according to claim 1, is characterized in that, described housing also comprises 3-8 part copper sulfide and 6-15 part carbon dust.
6. the compressor housings of turbocharger according to claim 5, is characterized in that, described compressor housings comprises following component and parts by weight thereof: α-Al
2o
3micro mist: 5-12 part, aluminium powder: 45-55 part, silica flour: 4-8 part, (Nb, Ti) C powder: 10-20 part, nickel powder: 0.8-1.5 part, cobalt powder: 2.5-5 part, copper sulfide: 4-8 part, carbon dust: 8-12 part.
7. a preparation method for the compressor housings of the turbocharger as described in any one of claim 1-6, is characterized in that, described preparation method comprises the steps:
S1, take material powder by weight, make medium with absolute ethyl alcohol, mix grinding 12-22h in ball mill, then dry;
S2, in dried material powder, add phenolic resins, under the pressure of 220-260MPa, carry out cold isostatic compaction, obtain compressor housings blank;
S3, compressor housings blank is first risen to 200 DEG C from room temperature under nitrogen protection carry out the pre-heat treatment; then 280-320 DEG C is risen to the heating rate of 0.5-0.6 DEG C/min; 1340-1400 DEG C is warming up to again with the heating rate of 8-10 DEG C/min; then HIP sintering 40-60min under 1320-1380 DEG C and 20-50MPa condition of nitrogen gas; 1050 DEG C are cooled to subsequently with the speed of 6-8 DEG C/min; then with stove cooling, the compressor housings finished product of turbocharger is obtained.
8. the preparation method of the compressor housings of turbocharger according to claim 7, is characterized in that, ball milling agent during mix grinding in step S1: absolute ethyl alcohol: material is 6:2:1.
9. the preparation method of the compressor housings of turbocharger according to claim 7, the addition of step S2 phenolic resins accounts for the 5-12% of material powder gross weight.
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| CN201510989747.9A CN105522146A (en) | 2015-12-24 | 2015-12-24 | Air compressor shell of turbocharger and manufacturing method of air compressor shell |
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| CN201510989747.9A CN105522146A (en) | 2015-12-24 | 2015-12-24 | Air compressor shell of turbocharger and manufacturing method of air compressor shell |
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| CN111747733A (en) * | 2020-06-28 | 2020-10-09 | 中科院过程工程研究所南京绿色制造产业创新研究院 | Al-MgO-ZrO for top-bottom combined blowing process of steel-making furnace2-C gas supply element and method for producing the same |
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Application publication date: 20160427 |