CN107746945B - A kind of process of surface treatment of high rigidity motorcycle camshaft - Google Patents
A kind of process of surface treatment of high rigidity motorcycle camshaft Download PDFInfo
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- CN107746945B CN107746945B CN201710973097.8A CN201710973097A CN107746945B CN 107746945 B CN107746945 B CN 107746945B CN 201710973097 A CN201710973097 A CN 201710973097A CN 107746945 B CN107746945 B CN 107746945B
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- camshaft
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/30—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for crankshafts; for camshafts
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/06—Surface hardening
- C21D1/09—Surface hardening by direct application of electrical or wave energy; by particle radiation
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/008—Martensite
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Abstract
The present invention relates to the intensity of a kind of pair of motorcycle camshaft, hardness, toughness and wearabilities significantly to be strengthened, there is the process of surface treatment of the high rigidity motorcycle camshaft of promotion to various aspects physical property, beneficial effect is: radiation modification technology utilization exposure light irradiates camshaft surface, and moment generates 105‑106DEG C/the high heating speed of s, and exposure beam is moved past and is generated with any one cooling technique in air-cooled technique, air-cooled technique and the cold technique of nitrogen up at least 105DEG C/cooling velocity being exceedingly fast of s, improve the hardness and strength of material surface；Under the quick heating condition of exposure beam, diffusion-homogenization process is difficult to carry out or have little time to carry out, and dramatically improves the hardness and strength of material surface；Strengthen intensity, hardness, toughness and the wearability of motorcycle camshaft significantly, has promotion to various aspects physical property.
Description
Technical field
The present invention relates to the intensity of a kind of process of surface treatment more particularly to a kind of pair of motorcycle camshaft, hardness, toughness
Significantly strengthened with wearability, there is the surface treatment of the high rigidity motorcycle camshaft of promotion to various aspects physical property
Technique.
Background technique
Motorcycle camshaft is the maximum friction parts of motorcycle；The speed of service is higher within the engine, contact stress is beaten,
Lubricating difficulties；The especially peach tip position long-term work of camshaft under high tired contact stress, be also easy to produce scratch, tearing,
It cuts and falls and early stage wear-out failure.Several hours when serious, or even very short time can grind away, and cause engine abnormal noise, return
It repairs.The work characteristics of camshaft determines that it must have certain strength and stiffness, certain toughness, good wearability.
And the intensity, wearability, toughness and hardness of camshaft of prior art preparation itself are not very high, routine use
Problem, and some racing car motors or in the motorcycle for having other demands, the performance of camshaft is particularly important, but from its
The angle of forging preparation itself has that cost is excessively high, production efficiency is low and removing one to improve its above-mentioned physical properties again
Other than a little racing car motors and problem that not all motorcycle is all especially harsh to the demand of camshaft, so from a subsequent processing
Aspect can effectively solve this problem to strengthen to motorcycle camshaft.
Patent Office of the People's Republic of China discloses a kind of powder metallurgy combined sintering formula camshaft and its system in authorization on September 7th, 2016
The patent of invention of Preparation Method, invention patent mandate Publication No. CN103899372B, which improves from material rubs
The manufacture of motorcycle camshaft improves its hardness, wearability, and has many advantages, such as low energy consumption, low cost, but its hardness is still not
Height, only up to 20HRC or more, toughness, wearability etc. performance are also to be improved.
Summary of the invention
For solve intensity, wearability, toughness and the hardness of the camshaft of above-mentioned prior art preparation itself be not it is very high,
Routine use is not problem, and some racing car motors or in the motorcycle for having other demands, the performance of camshaft is especially heavy
It wants, but has that cost is excessively high, production efficiency is low again from the angle of itself forging preparation to improve its above-mentioned physical properties
Down and the problem that other than some racing car motors and not all motorcycle is all especially harsh to the demand of camshaft is removed, the present invention mentions
Intensity, hardness, toughness and the wearability of a kind of pair of motorcycle camshaft has been supplied significantly to be strengthened, to various aspects physical property
There is the process of surface treatment of the motorcycle camshaft of promotion.
To achieve the above object, the invention adopts the following technical scheme:
A kind of process of surface treatment of high rigidity motorcycle camshaft, the surface treatment of the high rigidity motorcycle camshaft
Technique the following steps are included:
1) roughing, so that the cast obtained motorcycle camshaft cast(ing) surface that forms obtains simple process, it is subsequent
Surface treatment lay the groundwork；
2) Carburization Treatment provides carbon source when carrying out phase transformation through processing for subsequent motorcycle camshaft casting；
3) solid-state phase changes are strengthened, by changing solid-phase component and tissue morphology, by changing its crystal grain composition, thickness and shape
Looks generate the promotion of high degree come the hardness to camshaft material and hardness and toughness are made to have higher matching degree, and enhance
Its wearability
4) antirust treatment improves the oxidation resistance of motorcycle camshaft；
It is radiation modification technique that solid-state phase changes described in step 3), which are strengthened, antirust treatment described in step 4) include polishing,
Overlay film, plating, brush antirust paint, grease and boil at least one of black treatment process.
Preferably, radiation modification technique irradiation optical power used is 500-10000W.
Preferably, the scanning speed of exposure light light beam is 10-50cms in the radiation modification technique-1。
Preferably, the radiation modification technique includes irradiation temperature rise period and defocus temperature-fall period.
Preferably, the defocus temperature-fall period is using any one in air-cooled technique, air-cooled technique and the cold technique of nitrogen.
Preferably, irradiation band distribution pattern is vertical bar type, screw type, sinusoidal waveform, friendship in the radiation modification technique
Pitch grid type, any one in circular ring type.
Above-mentioned radiation modification technology utilization exposure light irradiates camshaft surface, and moment generates 105-106DEG C/s high plus
Thermal velocity, and exposure beam is moved past and is generated with any one cooling technique in air-cooled technique, air-cooled technique and the cold technique of nitrogen
Up at least 105DEG C/cooling velocity being exceedingly fast of s.Under conditions of irradiation quickly heating, the degree of superheat is very big, so that motorcycle
The phase driving force Δ G of camshaft casting becomes greatly, so that austenite and forming core number increase severely, at the same time quickly after heating
Moment austenitizing, austenite grain has little time to grow up, i.e., austenite grain is extremely refined, subsequent to martensite transfor mation
During be necessarily changed into tiny martensitic structure；Under the quick heating condition of exposure beam, diffusion-homogenization process is difficult
It is carried out with carrying out or having little time, causes carbon and alloy concentrations in austenite unevenly to increase, and then lead to the horse in different microcells
Family name's body phase transformation initial temperature is different, and with a collection of martensite can only it is close in martensitic traoformation initial temperature, concentration of carbon is similar
It is formed in microcell, thus in subsequent rapid cooling, martensite is refined, and formation is mixed by strip martensite and lamellar martensite
The cryptocrystalline martensite constituted is closed, the hardness and strength of material surface are dramatically improved.
Exposure light forms soft and hard alternation region and the irradiation hardening of overlap and non-overlapping area in multiple tracks scanning process
Band is parallel with the direction of rotation of axis, thus avoids the brittle flaking off of hardenability band, and hardenability band distributes alternately with non-hardenability band, non-hard
Change the effect for taking up oil storage anti-attrition, hardening takes up the effect of wear-resistant skeleton, improves the wearability of material surface, this soft or hard phase
Between overlap, soft portion toughness is preferable, can absorb compared with hard portion generate micro-plastic deformation when mechanical energy, alleviate to compared with
The percussion of huttriall position.
It is irradiated the motorcycle camshaft casting volume that light irradiation occurs after solid-state phase changes reinforcing slightly to expand, expansion occurs
In strengthening layer, expansion rate is about the 3-5% of strengthening layer thickness so that through should treated motorcycle camshaft surface exist it is certain
Compression, compression further generates reinforcing to the physical property of motorcycle camshaft.
The beneficial effects of the present invention are: radiation modification technology utilization exposure light irradiates camshaft surface, moment generates 105-
106DEG C/the high heating speed of s, and exposure beam is moved past with any in air-cooled technique, air-cooled technique and the cold technique of nitrogen
A kind of cooling technique generation reachable at least 105DEG C/cooling velocity being exceedingly fast of s, improve the hardness and strength of material surface；?
Under the quick heating condition of exposure beam, diffusion-homogenization process is difficult to carry out or have little time to carry out, and dramatically improves material
Expect the hardness and strength on surface；Strengthen intensity, hardness, toughness and the wearability of motorcycle camshaft significantly, to each
Aspect physical property has promotion.
Specific embodiment
Embodiment 1
A kind of process of surface treatment of high rigidity motorcycle camshaft, the surface treatment of the high rigidity motorcycle camshaft
Technique the following steps are included:
1) roughing, so that the cast obtained motorcycle camshaft cast(ing) surface that forms obtains simple process, it is subsequent
Surface treatment lay the groundwork；
2) Carburization Treatment provides carbon source when carrying out phase transformation through processing for subsequent motorcycle camshaft casting；
3) solid-state phase changes are strengthened, by changing solid-phase component and tissue morphology, by changing its crystal grain composition, thickness and shape
Looks generate the promotion of high degree come the hardness to camshaft material and hardness and toughness are made to have higher matching degree, and enhance
Its wearability
4) antirust treatment improves the oxidation resistance of motorcycle camshaft；
It is characterized in that, it is radiation modification technique that solid-state phase changes described in step 3), which are strengthened, at antirust described in step 4)
Reason includes polishing, overlay film, plating, brush antirust paint, grease and boils at least one of black treatment process；
Radiation modification technique irradiation optical power used is 500W, and the scanning speed of exposure light light beam is 10cms-1,
Defocus temperature-fall period uses air-cooled technique, and irradiation band distribution pattern is vertical bar type.
Embodiment 2
A kind of process of surface treatment of high rigidity motorcycle camshaft, the surface treatment of the high rigidity motorcycle camshaft
Technique the following steps are included:
1) roughing, so that the cast obtained motorcycle camshaft cast(ing) surface that forms obtains simple process, it is subsequent
Surface treatment lay the groundwork；
2) Carburization Treatment provides carbon source when carrying out phase transformation through processing for subsequent motorcycle camshaft casting；
3) solid-state phase changes are strengthened, by changing solid-phase component and tissue morphology, by changing its crystal grain composition, thickness and shape
Looks generate the promotion of high degree come the hardness to camshaft material and hardness and toughness are made to have higher matching degree, and enhance
Its wearability
4) antirust treatment improves the oxidation resistance of motorcycle camshaft；
It is characterized in that, it is radiation modification technique that solid-state phase changes described in step 3), which are strengthened, at antirust described in step 4)
Reason includes polishing, overlay film, plating, brush antirust paint, grease and boils at least one of black treatment process；
Radiation modification technique irradiation optical power used is 900W, and the scanning speed of exposure light light beam is 50cms-1,
For defocus temperature-fall period using in air-cooled technique, irradiation band distribution pattern is sinusoidal waveform.
Embodiment 3
A kind of process of surface treatment of high rigidity motorcycle camshaft, the surface treatment of the high rigidity motorcycle camshaft
Technique the following steps are included:
1) roughing, so that the cast obtained motorcycle camshaft cast(ing) surface that forms obtains simple process, it is subsequent
Surface treatment lay the groundwork；
2) Carburization Treatment provides carbon source when carrying out phase transformation through processing for subsequent motorcycle camshaft casting；
3) solid-state phase changes are strengthened, by changing solid-phase component and tissue morphology, by changing its crystal grain composition, thickness and shape
Looks generate the promotion of high degree come the hardness to camshaft material and hardness and toughness are made to have higher matching degree, and enhance
Its wearability
4) antirust treatment improves the oxidation resistance of motorcycle camshaft；
It is characterized in that, it is radiation modification technique that solid-state phase changes described in step 3), which are strengthened, at antirust described in step 4)
Reason includes polishing, overlay film, plating, brush antirust paint, grease and boils at least one of black treatment process；
Radiation modification technique irradiation optical power used is 850W, and the scanning speed of exposure light light beam is 35cms-1,
For defocus temperature-fall period using in the cold technique of nitrogen, irradiation band distribution pattern is to intersect grid type.
Embodiment 4
A kind of process of surface treatment of high rigidity motorcycle camshaft, the surface treatment of the high rigidity motorcycle camshaft
Technique the following steps are included:
1) roughing, so that the cast obtained motorcycle camshaft cast(ing) surface that forms obtains simple process, it is subsequent
Surface treatment lay the groundwork；
2) Carburization Treatment provides carbon source when carrying out phase transformation through processing for subsequent motorcycle camshaft casting；
3) solid-state phase changes are strengthened, by changing solid-phase component and tissue morphology, by changing its crystal grain composition, thickness and shape
Looks generate the promotion of high degree come the hardness to camshaft material and hardness and toughness are made to have higher matching degree, and enhance
Its wearability
4) antirust treatment improves the oxidation resistance of motorcycle camshaft；
It is characterized in that, it is radiation modification technique that solid-state phase changes described in step 3), which are strengthened, at antirust described in step 4)
Reason includes polishing, overlay film, plating, brush antirust paint, grease and boils at least one of black treatment process；
Radiation modification technique irradiation optical power used is 1000W, and the scanning speed of exposure light light beam is 50cms-1,
For defocus temperature-fall period using in air-cooled technique, irradiation band distribution pattern is circular ring type.
Embodiment 5
A kind of process of surface treatment of high rigidity motorcycle camshaft, the surface treatment of the high rigidity motorcycle camshaft
Technique the following steps are included:
1) roughing, so that the cast obtained motorcycle camshaft cast(ing) surface that forms obtains simple process, it is subsequent
Surface treatment lay the groundwork；
2) Carburization Treatment provides carbon source when carrying out phase transformation through processing for subsequent motorcycle camshaft casting；
3) solid-state phase changes are strengthened, by changing solid-phase component and tissue morphology, by changing its crystal grain composition, thickness and shape
Looks generate the promotion of high degree come the hardness to camshaft material and hardness and toughness are made to have higher matching degree, and enhance
Its wearability
4) antirust treatment improves the oxidation resistance of motorcycle camshaft；
It is characterized in that, it is radiation modification technique that solid-state phase changes described in step 3), which are strengthened, at antirust described in step 4)
Reason includes polishing, overlay film, plating, brush antirust paint, grease and boils at least one of black treatment process；
Radiation modification technique irradiation optical power used is 650W, and the scanning speed of exposure light light beam is 15cms-1,
For defocus temperature-fall period using in air-cooled technique, irradiation band distribution pattern is screw type.
Camshaft above after embodiment 1-5 surface treatment is detected, testing result is as follows:
1) gained motorcycle camshaft is surface-treated to above-described embodiment 1-5 and carries out surface hardness test, it is hard using Rockwell
Degree test, at HRC60 degree or more, the hardness compared to common motorcycle camshaft about HRC20 degree has its hardness of acquired results
The promotion of high degree；
2) gained motorcycle camshaft is surface-treated to above-described embodiment 1-5 and carries out the detection of surface peening layer, surface peening
Layer is with a thickness of 0.8-1mm, in outermost layer away from hardness highest within the scope of the 0-0.2mm of surface, away from outermost surface 0.6-0.7mm model
Interior hardness decline 8-10% is enclosed, strengthening layer integral hardness is high, and the uniformity is high.
3) gained motorcycle camshaft is surface-treated to above-described embodiment 1-5 and carries out wearability test, by its gained motor
Vehicle camshaft is placed on MRH-5A type abrasion tester, loads 800N, revolving speed 200r/min, and it is pure that 8-10 drop chemistry is added dropwise per minute
Atoleine, testing time are 30 minutes, and test result shows its weightlessness in 0.3-0.5mg, wear scar width 1-1.1mm, phase
Compared with common motorcycle camshaft, weightlessness is only 10% or so, has extremely strong wearability.
Claims (4)
1. a kind of process of surface treatment of high rigidity motorcycle camshaft, the surface treatment work of the high rigidity motorcycle camshaft
Skill the following steps are included:
1) roughing, so that the cast obtained motorcycle camshaft cast(ing) surface that forms obtains simple process, it is subsequent table
Surface treatment is laid the groundwork；
2) Carburization Treatment provides carbon source when carrying out phase transformation through processing for subsequent motorcycle camshaft casting；
3) solid-state phase changes are strengthened, by changing solid-phase component and tissue morphology, by change its crystal grain composition, thickness and pattern come
The promotion of high degree is generated to the hardness of camshaft material and makes hardness and toughness that there is higher matching degree, and it is resistance to enhance its
Mill property；
4) antirust treatment improves the oxidation resistance of motorcycle camshaft；
It is characterized in that, it is radiation modification technique, spoke used in the radiation modification technique that solid-state phase changes described in step 3), which are strengthened,
Irradiation power is 500-10000W, and the scanning speed of light beam is 10-50cms-1, antirust treatment described in step 4) includes throwing
Light, overlay film, plating, brush antirust paint, grease and boil at least one of black treatment process.
2. a kind of process of surface treatment of high rigidity motorcycle camshaft according to claim 1, which is characterized in that described
Radiation modification technique includes irradiation temperature rise period and defocus temperature-fall period.
3. a kind of process of surface treatment of high rigidity motorcycle camshaft according to claim 2, which is characterized in that described
Defocus temperature-fall period is using any one in air-cooled technique, air-cooled technique and the cold technique of nitrogen.
4. a kind of process of surface treatment of high rigidity motorcycle camshaft according to claim 1, which is characterized in that described
To be irradiated in radiation modification technique with distribution pattern be vertical bar type, screw type, sinusoidal waveform, intersects grid type, appointing in circular ring type
It anticipates one kind.
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| CN201710973097.8A CN107746945B (en) | 2017-10-18 | 2017-10-18 | A kind of process of surface treatment of high rigidity motorcycle camshaft |
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| CN201710973097.8A CN107746945B (en) | 2017-10-18 | 2017-10-18 | A kind of process of surface treatment of high rigidity motorcycle camshaft |
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| CN107746945B true CN107746945B (en) | 2019-04-16 |
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| DE102012212627A1 (en) * | 2012-07-18 | 2014-02-13 | Mahle International Gmbh | camshaft |
| CN106282792A (en) * | 2016-08-24 | 2017-01-04 | 南通亨特电器有限公司 | A kind of processing method of elevator safety gear voussoir |
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