CN107794440A - A kind of high intensity air admission fork pipe holder - Google Patents
A kind of high intensity air admission fork pipe holder Download PDFInfo
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- CN107794440A CN107794440A CN201710759565.1A CN201710759565A CN107794440A CN 107794440 A CN107794440 A CN 107794440A CN 201710759565 A CN201710759565 A CN 201710759565A CN 107794440 A CN107794440 A CN 107794440A
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- high intensity
- air admission
- pipe holder
- fork pipe
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/104—Intake manifolds
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Heat Treatment Of Articles (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
- Heat Treatment Of Sheet Steel (AREA)
Abstract
The present invention relates to a kind of support, and in particular to a kind of inlet manifold support, belongs to hot-rolled steel Material Field.High intensity inlet manifold support of the present invention is made up of hot-rolled steel material, and the hot-rolled steel material includes the component of following mass percent：C：0.1 0.2%, Si：0.1 0.35%, Mn：0.2 0.5%, Nb：0.01 0.02%, Ti：0.02 0.04%, V：0.015 0.03%, P：≤ 0.045%, S：≤ 0.045%, surplus Fe.The present invention uses the rational Steel material of compatibility, and use includes micron TiN, micron Al2O3, micron ZrC particulate additive molten steel is purified, the refinement of ferrite crystal grain can be promoted, so as to get high intensity air admission fork pipe holder strength and stiffness enhancing.
Description
Technical field
The present invention relates to a kind of support, and in particular to a kind of air admission fork pipe holder, belongs to hot-rolled steel Material Field.
Background technology
Why inlet manifold is referred to as " manifold " between air throttle and engine air admittance door, is because air enters section
After valve, after manifold buffering system, air flow channel just herein " difference ", corresponds to the quantity of engine cylinder, such as four cylinder engines
Jiu You tetra-, five cylinder engine Ze You five, air is directed respectively into each cylinder.For NA Naturally Aspirated Engine, due to air inlet
Manifold is located at after air throttle, so when engine throttle aperture is small, can not be drawn onto enough air in cylinder, will result in discrimination
Pipe vacuum is high；And when engine throttle aperture is big, the vacuum in inlet manifold will diminish.
In actual application, for air admission fork pipe holder due to environmental factor, its life-span is shorter, and intensity is not high, therefore goes back
It is extremely restricted.
The content of the invention
The purpose of the present invention is above mentioned problem be present for existing technology, it is proposed that a kind of high intensity inlet manifold branch
Frame.
The present invention above-mentioned purpose realize by following technical solution, a kind of high intensity air admission fork pipe holder, the branch
Frame is made up of hot-rolled steel material, and the hot-rolled steel material includes the component of following mass percent：C：0.1-0.2%, Si：0.1-
0.35%, Mn：0.2-0.5%, Nb：0.01-0.02%, Ti：0.02-0.04%, V：0.015-0.03%, P：≤
0.045%, S：≤ 0.045%, surplus Fe.
High intensity air admission fork pipe holder of the present invention is made of steel, moreover, C content is 0.1-0.2% in the present invention, is
A kind of mild steel, intensity and hardness are relatively low, but plasticity and toughness are preferable.Meanwhile the steel that the present invention uses is a kind of carburizing steel, tool
There are the wearing layer of high-carbon and the high-strength tenacity center portion of low-carbon, huge impact load, contact stress and abrasion can be born.
Carbon content is too high in the steel that high intensity air admission fork pipe holder of the present invention uses, then center portion can be caused not have enough
Toughness and intensity, therefore, the present invention select 0.1-0.15% C content, to ensure that center portion has enough toughness and intensity.
In addition, to improve the quenching degree of steel, it is originally bright to be also added into appropriate Mn members so as to improve the toughness of center portion and intensity
Element, Mn are solid-solution in ferrite, and solution strengthening effect is played to steel.With the increase of Mn contents, due to hindering grain boundary ferrite
Forming core, grain boundary ferrite are tapered, and coarse grain zone toughness is improved.But Mn too high levels, coarse grain zone form substantial amounts of crisp
Property tissue M-A islands, cause coarse grain zone low-temperature flexibility to deteriorate again, thus the present invention using above-mentioned content Mn elements, Neng Goubao
When card center portion there are enough wilfulnesses and intensity, grain refinement is not impacted.
Wherein, the present invention adds Nb elements on the basis of Mn elements, can form NbC in steel, NbN compounds,
In recrystallization process, because of NbC, NbN is to anchoring of dislocation and prevents sub boundary migration from greatly prolonging the recrystallization time, and
Nb prevents austenite reversion, the effect of recrystallization most strong, so as to play a part of crystal grain thinning, the steel that strengthens to obtain it is strong
Degree.
In addition, the present invention is also added into micro V element, V element has stronger affinity with V, N, can form V (C, N)
Disperse little particle, have pinning effect to austenite grain boundary, austenite grain boundary can be hindered to migrate, and improve the Coarsening Temperature of steel,
The V (C, N) formed simultaneously separates out in austenite to during ferritic transformation in boundary, effectively prevents ferrite crystal to grow
Greatly, fining ferrite grains are played a part of.
Furthermore the present invention is also added into trace Ti element, Ti can be coagulated with TiN, Tic disperse educt as molten steel in steel
Gu when solid nucleus, be advantageous to crystallize, refine the tissue of steel.Ti is also as lively as a cricket metallic element, can be generated with iron and carbon
The carbide particle of indissoluble, grain boundaries are enriched in, prevent grain coarsening.
It is described it is another object of the present invention to provide a kind of preparation method of above-mentioned high intensity air admission fork pipe holder
Method comprises the following steps：
Melting：The Steel material for preparing high intensity air admission fork pipe holder is added after converter is melted molten steel is hung to ladle refining
Stove is refined, and after coming out of the stove, carries out pouring into a mould to obtain steel；
Heat treatment：High intensity air inlet is obtained after steel are carried out into normalized treatment, Carburization Treatment, Quenching Treatment and temper
Manifold support blank；
Post processing：High intensity air admission fork pipe holder blank obtains high intensity inlet manifold after carrying out bead, the processing of cold school
Support finished product.
In a kind of above-mentioned preparation method of high intensity air admission fork pipe holder, the molten steel is additionally added before being hung to ladle refining
Particulate additive, the composition of the particulate additive are：Micron TiN：5-10 parts, micron Al2O3:5-10 parts, micron ZrC：
2-5 parts.The present invention can make their forming core cores as phase transformation by adding particulate additive in firm water, increase nucleation rate,
When being covered with the nano-particle of small and dispersed in molten steel, these refractory particles just become during molten steel solidification and just become
The core of the heterogeneous forming core of molten steel, has greatly facilitated Heterogeneous Nucleation rate, so as to the solidification austenite first phase refined, increase
Austenite crystal interfacial area.In subsequent phase transformation and hot procedure, ferrite preferentially forming core point, therefore increase is added
Ferrite nucleation rate.Meanwhile the additional particle inside austenite crystal can turn into phase deformed nucleus core again, promote ferrite brilliant
The refinement of grain.For the present invention using the method for adding particulate additive, the air admission fork pipe holder intensity that can make to obtain is high.
Preferably, the addition of the particulate additive is the 0.02-0.04% of steel product quality.
In a kind of above-mentioned preparation method of high intensity air admission fork pipe holder, a diameter of 1- of the particulate additive
1.5um。
In a kind of above-mentioned preparation method of high intensity air admission fork pipe holder, the particulate additive first mixes with equivalent iron powder
Close, be pressed into little particle after stirring and be then added in molten steel.In the present invention particulate additive use with scattered method, can reduce
The reunion of the particle and composition in making in particulate additive is well dispersed in molten steel in grain additive.
In a kind of above-mentioned preparation method of high intensity air admission fork pipe holder, the normalized treatment is sub- warm normalized treatment.
Because the carbon content of steel of the present invention is relatively low, belong to mild steel, its intensity and hardness are relatively low, and normalized treatment can refine group
Knit, improve steel performance, so as to improve machinability, the machining after being is prepared.Moreover, what the present invention used
It is sub- warm normalizing, sub- warm normalizing is heated between Ac1-Ac3 temperature, the handling process of air cooling after insulation.The present invention is using sub-
It warm normalizing process, can reduce carbide dispersion degree, granular bainite is eliminated, and cutting ability is obviously improved, and crudy carries
It is high；Meanwhile the reasonable cooperation between the small grains structure and each phase constitution of undissolved ferrite of sub- warm normalizing acquisition, it can not only improve
Cutting ability, and there is good comprehensive mechanical performance.
In a kind of above-mentioned preparation method of high intensity air admission fork pipe holder, the temperature of the warm normalized treatment in Asia is 900-
950 DEG C, time 25-35min.The present invention controls the temperature and time of sub- warm normalized treatment in above range, can make Ovshinsky
Body degree increases, due to the rise of granular bainite microstructure Zhong M/A islands content, size increase, distribution more disperse and twin
Martensite content increases, and M/A islands dispersion-strengthened action gradually rises, and the hardness and its intensity for making material significantly increase.
In a kind of above-mentioned preparation method of high intensity air admission fork pipe holder, the temperature of the Carburization Treatment is 950-1100
DEG C, time 5-10h, carburized layer thickness is 3.8-5.2mm after carburizing.The steel carbon content that the present invention uses is relatively low, therefore carries out
Carburization Treatment will be formed in workpiece surface has the change of carbon profile from high to low, promotes zero component from surface to center portion shape
Into the graded of structure property, so as to form gradient material in zero component surface, the case hardness, resistance to of zero component can be improved
Mill property and anti-fatigue performance, and center portion still keeps good toughness.
In a kind of above-mentioned preparation method of high intensity air admission fork pipe holder, the temperature of the quenching is 850-900 DEG C, is quenched
The fiery time is 2-3h.
In a kind of above-mentioned preparation method of high intensity air admission fork pipe holder, the tempering includes once tempering and secondary returning
Fire, the temperature being once tempered are 540-650 DEG C, time 3-5h, and the temperature of double tempering is 520-630 DEG C, time 2.5-
4h.The present invention uses double tempering, can prevent the generation of temper brittleness, while reduces fragility, eliminates or reduce internal stress.
In a kind of above-mentioned preparation method of high intensity air admission fork pipe holder, the operating pressure of the bead is 3.5-
4.0Bar, nozzle translational speed are 200-250mm/min, bullet flow is 8-10kg/min.Workpiece surface passes through shot peening strengthening
After processing, the institutional framework of workpiece surface can occur significantly to change, such as surface layer grain refinement, dislocation density increase, remnants
Austenite reduction etc..The change of institutional framework, it imply that the change of workpiece surface performance.
Compared with prior art, the invention has the advantages that：
1st, the present invention uses the rational Steel material of compatibility, and use includes micron TiN, micron Al2O3, micron ZrC
Grain additive purifies to molten steel, can promote the refinement of ferrite crystal grain, so as to get high intensity air admission fork pipe holder
Strength and stiffness strengthen.
2nd, the present invention uses mild steel, and the methods of sub- warm normalizing is used in preparation process, while is added in steel
Mn, Nb, Ti, V element, the air admission fork pipe holder intensity enabled to are high；
3rd, high intensity air admission fork pipe holder of the present invention uses special steel, and configures rational preparation method, so as to get
Air admission fork pipe holder not only intensity is high, and material is frivolous, easy to use, plasticity is strong.
Embodiment
It is the specific embodiment of the present invention below, technical scheme is further described, but the present invention is simultaneously
It is not limited to these embodiments.
Embodiment 1：
Melting：Molten steel is hung into ladle refining furnace after following steel product ingredient addition converter is melted to be refined, refined
Preceding addition quality is steel product quality 0.02%, a diameter of 1 μm of particulate additive, and the composition of the particulate additive is：Micron
TiN：5 parts, micron Al2O3:5 parts, micron ZrC：2 parts；After coming out of the stove, carry out pouring into a mould to obtain steel；Wherein, the steel product ingredient composition
For：C：0.1%, Si：0.1%, Mn：0.2%, Nb：0.01%, Ti：0.02%, V：0.015%, P：0.02%, S：
0.02%, surplus Fe.
Heat treatment：High intensity air inlet is obtained after steel are carried out into normalized treatment, Carburization Treatment, Quenching Treatment and temper
Manifold support blank, wherein, normalized treatment is sub- warm normalized treatment, and temperature is 900 DEG C, and the normalized treatment time is 25min；Carburizing
Treatment temperature is 950 DEG C, time 5h, and Carburization Treatment thickness is 3.8mm；Hardening heat is 850 DEG C, time 2h；At tempering
Reason includes once tempering and double tempering, and Tempering temperature is 540 DEG C, time 3h, and double tempering temperature is 520 DEG C, when
Between be 2.5h；
Post processing：High intensity air admission fork pipe holder blank carries out packing to obtain high intensity after carrying out bead, the processing of cold school
The operating pressure of air admission fork pipe holder finished product, wherein bead is 3.5Bar, nozzle translational speed is 200mm/min, bullet
Flow is 8kg/min.
The composition of the particulate additive is：Micron TiN：6 parts, micron Al2O3:6 parts, micron ZrC：2 parts；After coming out of the stove, enter
Row pours into a mould to obtain steel；
Heat treatment：High intensity air inlet is obtained after steel are carried out into normalized treatment, Carburization Treatment, Quenching Treatment and temper
Manifold support blank, wherein, normalized treatment is sub- warm normalized treatment, and temperature is 910 DEG C, and the normalized treatment time is 27min；Carburizing
Treatment temperature is 980 DEG C, time 6h, and Carburization Treatment thickness is 4.1mm；Hardening heat is 860 DEG C, time 2.2h；Tempering
Processing includes once tempering and double tempering, and Tempering temperature is 560 DEG C, time 3.4h, and double tempering temperature is 540
DEG C, time 2.8h；
Post processing：High intensity air admission fork pipe holder blank carries out packing to obtain high intensity after carrying out bead, the processing of cold school
The operating pressure of air admission fork pipe holder finished product, wherein bead is 3.6Bar, nozzle translational speed is 210mm/min, bullet
Flow is 8.4kg/min.
Embodiment 2：
Melting：Molten steel is hung into ladle refining furnace after following steel product ingredient addition converter is melted to be refined, refined
Preceding addition quality is steel product quality 0.024%, a diameter of 1.1 μm of particulate additive, and the composition of the particulate additive is：It is micro-
Rice TiN：6 parts, micron Al2O3:6 parts, micron ZrC：2 parts；After coming out of the stove, carry out pouring into a mould to obtain steel；Wherein, the steel product ingredient group
Turn into：C：0.12%, Si：0.15%, Mn：0.26%, Nb：0.012%, Ti：0.024%, V：0.018%, P：0.015%,
S：0.02%, surplus Fe.
Heat treatment：High intensity air inlet is obtained after steel are carried out into normalized treatment, Carburization Treatment, Quenching Treatment and temper
Manifold support blank, wherein, normalized treatment is sub- warm normalized treatment, and temperature is 910 DEG C, and the normalized treatment time is 27min；Carburizing
Treatment temperature is 980 DEG C, time 6h, and Carburization Treatment thickness is 4.1mm；Hardening heat is 860 DEG C, time 2.2h；Tempering
Processing includes once tempering and double tempering, and Tempering temperature is 560 DEG C, time 3.4h, and double tempering temperature is 540
DEG C, time 2.8h；
Post processing：High intensity air admission fork pipe holder blank carries out packing to obtain high intensity after carrying out bead, the processing of cold school
The operating pressure of air admission fork pipe holder finished product, wherein bead is 3.6Bar, nozzle translational speed is 210mm/min, bullet
Flow is 8.4kg/min.
Embodiment 3：
Melting：Molten steel is hung into ladle refining furnace after following steel product ingredient addition converter is melted to be refined, essence
It is steel product quality 0.028%, a diameter of 1.2 μm of particulate additive that quality is added before refining, and the composition of the particulate additive is：
Micron TiN：7 parts, micron Al2O3:7 parts, micron ZrC：3 parts；After coming out of the stove, carry out pouring into a mould to obtain steel；Wherein, the steel product ingredient
Form and be：C：0.14%, Si：0.2%, Mn：0.32%, Nb：0.014%, Ti：0.028%, V：0.021%, P：0.03%,
S：0.03%, surplus Fe.
Heat treatment：High intensity air inlet is obtained after steel are carried out into normalized treatment, Carburization Treatment, Quenching Treatment and temper
Manifold support blank, wherein, normalized treatment is sub- warm normalized treatment, and temperature is 920 DEG C, and the normalized treatment time is 29min；Carburizing
Treatment temperature is 1010 DEG C, time 7h, and Carburization Treatment thickness is 4.4mm；Hardening heat is 870 DEG C, time 2.4h；Tempering
Processing includes once tempering and double tempering, and Tempering temperature is 580 DEG C, time 3.8h, and double tempering temperature is 560
DEG C, time 3.1h；
Post processing：High intensity air admission fork pipe holder blank carries out packing to obtain high intensity after carrying out bead, the processing of cold school
The operating pressure of air admission fork pipe holder finished product, wherein bead is 3.7Bar, nozzle translational speed is 220mm/min, bullet
Flow is 8.8kg/min.
Embodiment 4：
Melting：Molten steel is hung into ladle refining furnace after following steel product ingredient addition converter is melted to be refined, refined
Preceding addition quality is steel product quality 0.032%, a diameter of 1.3 μm of particulate additive, and the composition of the particulate additive is：It is micro-
Rice TiN：8 parts, micron Al2O3:8 parts, micron ZrC：4 parts；After coming out of the stove, carry out pouring into a mould to obtain steel；Wherein, the steel product ingredient group
Turn into：C：0.16%, Si：0.25%, Mn：0.38%, Nb：0.016%, Ti：0.032%, V：0.024%, P：0.02%,
S：0.03%, surplus Fe.
Heat treatment：High intensity air inlet is obtained after steel are carried out into normalized treatment, Carburization Treatment, Quenching Treatment and temper
Manifold support blank, wherein, normalized treatment is sub- warm normalized treatment, and temperature is 930 DEG C, and the normalized treatment time is 31min；Carburizing
Treatment temperature is 1040 DEG C, time 8h, and Carburization Treatment thickness is 4.7mm；Hardening heat is 880 DEG C, time 2.6h；Tempering
Processing includes once tempering and double tempering, and Tempering temperature is 600 DEG C, time 4.2h, and double tempering temperature is 580
DEG C, time 3.4h；
Post processing：High intensity air admission fork pipe holder blank carries out packing to obtain high intensity after carrying out bead, the processing of cold school
The operating pressure of air admission fork pipe holder finished product, wherein bead is 3.8Bar, nozzle translational speed is 230mm/min, bullet
Flow is 9.2kg/min.
Embodiment 5：
Melting：Molten steel is hung into ladle refining furnace after following steel product ingredient addition converter is melted to be refined, refined
Preceding addition quality is steel product quality 0.036%, a diameter of 1.4 μm of particulate additive, and the composition of the particulate additive is：It is micro-
Rice TiN：9 parts, micron Al2O3:9 parts, micron ZrC：4 parts；After coming out of the stove, carry out pouring into a mould to obtain steel；Wherein, the steel product ingredient group
Turn into：C：0.18%, Si：0.3%, Mn：0.44%, Nb：0.018%, Ti：0.036%, V：0.028%, P：0.03%, S：
0.02%, surplus Fe.
Heat treatment：High intensity air inlet is obtained after steel are carried out into normalized treatment, Carburization Treatment, Quenching Treatment and temper
Manifold support blank, wherein, normalized treatment is sub- warm normalized treatment, and temperature is 940 DEG C, and the normalized treatment time is 33min；Carburizing
Treatment temperature is 1070 DEG C, time 9h, and Carburization Treatment thickness is 5mm；Hardening heat is 890 DEG C, time 2.8h；At tempering
Reason includes once tempering and double tempering, and Tempering temperature is 620 DEG C, time 4.6h, and double tempering temperature is 600 DEG C,
Time is 3.7h；
Post processing：High intensity air admission fork pipe holder blank carries out packing to obtain high intensity after carrying out bead, the processing of cold school
The operating pressure of air admission fork pipe holder finished product, wherein bead is 7.9Bar, nozzle translational speed is 240mm/min, bullet
Flow is 9.6kg/min.
Embodiment 6：
Melting：Molten steel is hung into ladle refining furnace after following steel product ingredient addition converter is melted to be refined, refined
Preceding addition quality is steel product quality 0.04%, a diameter of 1.5 μm of particulate additive, and the composition of the particulate additive is：It is micro-
Rice TiN：10 parts, micron Al2O3:10 parts, micron ZrC：5 parts；After coming out of the stove, carry out pouring into a mould to obtain steel；Wherein, the steel product ingredient
Form and be：C：0.2%, Si：0.35%, Mn：0.5%, Nb：0.02%, Ti：0.04%, V：0.03%, P：0.035%, S：
0.015%, surplus Fe.
Heat treatment：High intensity air inlet is obtained after steel are carried out into normalized treatment, Carburization Treatment, Quenching Treatment and temper
Manifold support blank, wherein, normalized treatment is sub- warm normalized treatment, and temperature is 950 DEG C, and the normalized treatment time is 35min；Carburizing
Treatment temperature is 1100 DEG C, time 10h, and Carburization Treatment thickness is 5.2mm；Hardening heat is 900 DEG C, time 3h；Tempering
Processing includes once tempering and double tempering, and Tempering temperature is 650 DEG C, time 5h, and double tempering temperature is 630 DEG C,
Time is 4h；
Post processing：High intensity air admission fork pipe holder blank carries out packing to obtain high intensity after carrying out bead, the processing of cold school
The operating pressure of air admission fork pipe holder finished product, wherein bead is 4.0Bar, nozzle translational speed is 250mm/min, bullet
Flow is 10kg/min.
Comparative example 1
The comparative example differs only in embodiment 1, Nb is free of in the comparative example, other are same as Example 1, herein
It is not repeated.
Comparative example 2
The comparative example differs only in embodiment 1, Ti is free of in the comparative example, other are same as Example 1, herein
It is not repeated.
Comparative example 3
The comparative example differs only in embodiment 1, V is free of in the comparative example, other are same as Example 1, herein
It is not repeated.
Comparative example 4
The comparative example is differed only in embodiment 1, and particulate additive is free of in the comparative example, other and embodiment 1
It is identical, it is not repeated herein.
Comparative example 5
The comparative example differs only in embodiment 1, only with first time temper in the comparative example, other and reality
It is identical to apply example 1, is not repeated herein.
High intensity air admission fork pipe holder in embodiment 1-6 and comparative example 1-5 is subjected to performance test, test result such as following table
It is shown.
It follows that high intensity air admission fork pipe holder of the present invention uses special steel, and rational preparation method is configured,
Make obtained air admission fork pipe holder not only intensity height, and material is frivolous, easy to use, plasticity is strong.
Specific embodiment described herein is only to spirit explanation for example of the invention.Technology belonging to the present invention is led
The technical staff in domain can be made various modifications or supplement to described specific embodiment or be substituted using similar mode, but simultaneously
Do not deviate by the spirit of the present invention or surmount scope defined in appended claims.
It is skilled to this area although having been made a detailed description to the present invention and being cited some specific embodiments
For technical staff, as long as it is obvious that can make various changes or correct without departing from the spirit and scope of the present invention.
Claims (10)
1. a kind of high intensity air admission fork pipe holder, the high intensity air admission fork pipe holder is made up of hot-rolled steel material, the hot rolling
Steel material is made up of the component of following mass percent：C：0.1-0.2%, Si：0.1-0.35%, Mn：0.2-0.5%, Nb：
0.01-0.02%, Ti：0.02-0.04%, V：0.015-0.03%, P：≤ 0.045%, S：≤ 0.045%, surplus Fe.
A kind of 2. high intensity air admission fork pipe holder according to claim 1, it is characterised in that the high intensity inlet manifold
The preparation method of support comprises the following steps：
Melting：Molten steel is hung into ladle refining furnace after the Steel material addition converter for preparing high intensity inlet manifold support is melted to enter
Row refining, after coming out of the stove, carries out pouring into a mould to obtain steel；
Heat treatment：Air admission fork pipe holder base is obtained after steel are carried out into normalized treatment, Carburization Treatment, Quenching Treatment and temper
Part；
Post processing：Inlet manifold blank carries out Shot Blasting, cold school handles to obtain inlet manifold support finished product.
A kind of 3. preparation method of high intensity air admission fork pipe holder according to claim 2, it is characterised in that the molten steel
It is hung to the particulate additive that steel product quality 0.02-0.04% is also added into before ladle refining.
A kind of 4. preparation method of high intensity air admission fork pipe holder according to claim 3, it is characterised in that the particle
The composition of additive is：Micron TiN：5-10 parts, micron Al2O3:5-10 parts, micron ZrC：2-5 parts.
A kind of 5. preparation method of high intensity air admission fork pipe holder according to claim 3, it is characterised in that the particle
A diameter of 1-1.5um of additive.
A kind of 6. preparation method of high intensity air admission fork pipe holder according to claim 3, it is characterised in that the particle
Additive is first mixed with equivalent iron powder, and little particle is pressed into after stirring and is then added in molten steel.
A kind of 7. preparation method of high intensity air admission fork pipe holder according to claim 2, it is characterised in that the normalizing
It is 900-950 DEG C to handle as sub- warm normalized treatment, temperature, time 25-35min.
A kind of 8. preparation method of high intensity air admission fork pipe holder according to claim 2, it is characterised in that the carburizing
The temperature of processing is 950-1100 DEG C, time 5-10h, and carburized layer thickness is 3.8-5.2mm after carburizing.
A kind of 9. preparation method of high intensity air admission fork pipe holder according to claim 2, it is characterised in that the quenching
Temperature be 850-900 DEG C, cool time 2-3h.
10. the preparation method of a kind of high intensity air admission fork pipe holder according to claim 2, it is characterised in that described time
Fire includes once tempering and double tempering, and the temperature being once tempered is 540-650 DEG C, time 3-5h, the temperature of double tempering
For 520-630 DEG C, time 2.5-4h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN111020455A (en) * | 2019-12-16 | 2020-04-17 | 武汉理工大学 | Sub-temperature carburizing heat treatment method for reducing heat treatment deformation of thin-wall gear |
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