CN106122447A - A kind of belt pulley and the preparation method of belt pulley - Google Patents
A kind of belt pulley and the preparation method of belt pulley Download PDFInfo
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- CN106122447A CN106122447A CN201610569357.0A CN201610569357A CN106122447A CN 106122447 A CN106122447 A CN 106122447A CN 201610569357 A CN201610569357 A CN 201610569357A CN 106122447 A CN106122447 A CN 106122447A
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- Prior art keywords
- pulley
- belt pulley
- tungsten carbide
- tubular body
- pulley body
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
- F16H55/32—Friction members
- F16H55/36—Pulleys
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/14—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass gear parts, e.g. gear wheels
Abstract
The invention discloses the preparation method of a kind of belt pulley and belt pulley, relate to belt pulley technical field, described belt pulley includes: pulley body, described pulley body surface is provided with multiple depression tubular body, and the inner surface of described pulley body surface and described depression tubular body is equipped with tungsten carbide enhancement layer, wherein, the material of described pulley body includes tungsten system high-speed steel.The present invention improves anti-wear performance and the toughness of belt pulley.
Description
Technical field
The present invention relates to belt pulley technical field, particularly to a kind of belt pulley and the preparation method of belt pulley.
Background technology
Belt pulley belongs to hub class part, is mainly used in Long Distant Transmit power, in automobile, mining machinery, machining
The aspects such as equipment, air compressor machine, decelerator, electromotor are widely used.The simple in construction of belt pulley, easy to adjust,
Big advantage is to relax load impacting, and reduces the noise in transmission process, and it is as actuating device, in use wants
Transmission load and power, it will usually by moment of flexure and the comprehensive function of shearing force, and bear strong vibration, thus easily produce
Raw cracking, this just requires that belt pulley must have certain strength and stiffness, and Mass Distribution is uniform；Further, since belt
Wheel surface is for a long time by rubbing action, in addition it is also necessary to ask pulley surface to have certain wearability and good high-temperature behavior,
Finally, the internal stress produced in manufacture should also be eliminated.
The material of existing belt pulley is generally cast iron and cast steel, and uses the skin that the single material such as cast iron and cast steel produces
Although belt wheel can reach to transmit the requirement of load, but due to the flake graphite meeting in the attribute of material itself, cast iron and cast steel
Matrix is produced and isolates effect, easily cause stress at graphite sharp corner and concentrate, bear load effect the most for a long time, it will usually
Stress raiser occurs that crackle even ruptures.Thus, higher part is required for some Mass accuracy, particularly at height
In the case of speed is run, utilize the belt pulley of cast iron and casting production can not meet its technology requirement.
Summary of the invention
In view of this, the present invention provides the preparation method of a kind of belt pulley and belt pulley, which solves existing belt pulley resistance to
The problems such as mill property difference.
The present invention solves the problems referred to above by techniques below means:
A kind of belt pulley of the present invention, including: pulley body, described pulley body surface is provided with multiple depression tubular body,
And the inner surface of described pulley body surface and described depression tubular body is equipped with tungsten carbide enhancement layer, wherein, described belt
The material of wheel body includes tungsten system high-speed steel.
Further, the spacing between adjacent two described depression tubular bodies is 25 μm～1000 μm, described depression tubular body
Caliber be 10 μm～40 μm, the degree of depth of described depression tubular body is less than or equal to 20 μm.
Further, the thickness of described tungsten carbide enhancement layer is 5 μm～15 μm, and described tungsten carbide enhancement layer is by being evenly distributed on
Tungsten carbide particle composition on described pulley body surface and described depression tubular body inner surface, the grain of described tungsten carbide particle
Footpath is 0.5 μm～3.0 μm, and the volume fraction of described tungsten carbide particle is 70%～95%.
A kind of belt pulley of the present invention has the advantages that
The present invention provides a kind of belt pulley, and including pulley body, pulley body surface is provided with multiple depression tubular body, and skin
The inner surface of belt wheel body surface and depression tubular body is equipped with tungsten carbide enhancement layer, as such, it is possible to by tungsten carbide enhancement layer
It is effectively increased the surface recombination thickness of belt pulley, improves the anti-wear performance of belt pulley and comprehensive serviceability.
The preparation method of a kind of belt pulley of the present invention, comprises the following steps: step 1: entered on the surface of pulley body
Row processes；Wherein, the material of described pulley body includes tungsten system high-speed steel；Step 2: use laser-beam drilling machine that surface is processed
After pulley body punch, and the pulley body after punching is carried out successively pickling, to be washed to neutrality, ultrasound wave clear
Wash, obtain the pulley body with depression tubular body；Step 3: the pulley body with depression tubular body is placed on very
Empty carburizer carries out carburizing under preset temperature, and is incubated according to Preset Time, obtain the belt with carbide layers
Wheel body；Step 4: the pulley body with carbide layers is carried out heating quenching and temper successively, obtains that there is carbon
Change the belt pulley of tungsten enhancement layer.
Further, the surface of pulley body carried out process the specifically including of described step 1: by described pulley body
Surface use acetone clean.
Further, it is concrete that the pulley body after using laser-beam drilling machine to process surface in described step 2 carries out punching
Including: under vacuum condition or inert gas shielding, the pulley body after using laser-beam drilling machine to process surface carries out beating
Hole.
Further, the liquid that in described step 2, pickling uses includes the hydrochloric acid that volumetric concentration is 300 ml/L, or, body
Volume concentrations is the phosphoric acid of 60ml/L, or, volumetric concentration is the hydrogen peroxide of 120ml/L, or, volumetric concentration is 300ml/L's
Fluohydric acid., or, volumetric concentration is the sulphuric acid of 200ml/L；Described ultrasonic waves for cleaning specifically includes: use ethanol or acetone to carry out
Ultrasonic waves for cleaning.
Further, in the vacuum cementation furnace of described step 3, the mass fraction of carbon is 0.9%～1.0%, described vacuum cementation furnace
Interior vacuum is less than or equal to 1 × 104Pa, described preset temperature is 920 DEG C～940 DEG C, described Preset Time be 10min～
35min, described in there is depression tubular body pulley body unit are in the mass fraction of carburizing less than or equal to 0.5%.
Further, in described step 4, the temperature of heating quenching is 780 DEG C～820 DEG C, and the temperature of tempering is 300 DEG C～420
℃。
The preparation method of a kind of belt pulley of the present invention has the advantages that
The invention provides the preparation method of a kind of belt pulley, first, under vacuum condition or inert gas shielding, use laser
Puncher forms several depression tubular bodies on the surface of pulley body, and can be to the spacing between depression tubular body, depression
The degree of depth and the caliber of tubular body are adjusted；Then, pulley body is carried out under preset temperature and Preset Time carburizing and
Insulation so that tungsten atom and carbon atom react generation tungsten carbide under solid state temperature, it is possible to according to the depression tubular body accomplished fluently
Limiting the diffusion of tungsten carbide, it is achieved that in pulley body, tungsten carbide increases the preparation of layer, it can be effectively increased belt pulley originally
The surface recombination thickness of body, improves the anti-wear performance of belt pulley and comprehensive serviceability；And the tungsten carbide particle in the present invention
And it is metallurgical binding between pulley body, is firmly combined with, tungsten carbide particle difficult drop-off；Meanwhile, can preset by controlling carburizing
The regulation of time and preset temperature, laser boring parameter controls the grain volume fraction of tungsten carbide enhancement layer, distribution and form,
Solve the problem that existing belt pulley wears no resistance, improve the overall mechanical property of belt pulley and heat-resisting, anti-wear performance, and system
Preparation Method is simple, it is easy to implement.
Accompanying drawing explanation
The invention will be further described with embodiment below in conjunction with the accompanying drawings.
Fig. 1 is the structural representation of a kind of belt pulley with tungsten carbide enhancement layer of the present invention；
Fig. 2 is the structural representation of a kind of pulley body of the present invention；
Fig. 3 is the sectional view of a kind of belt pulley with tungsten carbide enhancement layer of the present invention.
Detailed description of the invention
Below with reference to accompanying drawing, the present invention is described in detail, as shown in Figure 1 to Figure 3: a kind of belt of the present embodiment
Wheel includes: pulley body 1, and described pulley body 1 surface is provided with multiple depression tubular body 4, and described pulley body 1 table
The inner surface of face and described depression tubular body 4 is equipped with tungsten carbide enhancement layer 2.
Wherein, the material of described pulley body 1 includes tungsten system high-speed steel.
Concrete, tungsten system high-speed steel can be W18Cr4V, W14Cr4VMn, W9Mo3Cr4V etc..
In the present embodiment, the spacing between adjacent two described depression tubular bodies 4 is 25 μm～1000 μm, described depression pipe
The caliber of shape body 4 is 10 μm～40 μm, and the degree of depth of described depression tubular body 4 is less than or equal to 20 μm.
In the present embodiment, the thickness of described tungsten carbide enhancement layer 2 is 5 μm～15 μm, and described tungsten carbide enhancement layer 2 is by uniformly
The tungsten carbide particle 3 being distributed on described pulley body 1 surface and described depression tubular body 4 inner surface forms, described carbonization
The particle diameter of tungsten particle 3 is 0.5 μm～3.0 μm, and the volume fraction of described tungsten carbide particle 3 is 70%～95%.
In the present embodiment, the fundamental tissue of pulley body 1 is pearlite, sorbite, bainite, martensite, austenite
With any one or a few in ferrite.
The present invention provides a kind of belt pulley, and including pulley body, pulley body surface is provided with multiple depression tubular body,
And the inner surface of pulley body surface and depression tubular body is equipped with tungsten carbide enhancement layer, as such, it is possible to increased by tungsten carbide
Strong layer is effectively increased the surface recombination thickness of belt pulley, improves the anti-wear performance of belt pulley and comprehensive serviceability.
The preparation method of a kind of belt pulley of the present invention, mainly comprises the steps that
Step 1: the surface of pulley body is processed.
Wherein, the material of described pulley body includes tungsten system high-speed steel.
Concrete, use acetone to clean on the surface of described pulley body.
Step 2: the pulley body after using laser-beam drilling machine to process surface is punched, and to the belt after punching
Wheel body carries out pickling successively, is washed to neutrality, ultrasonic waves for cleaning, obtains the pulley body with depression tubular body.
Wherein, the liquid that pickling uses includes the hydrochloric acid that volumetric concentration is 300 ml/L, or, volumetric concentration is 60ml/L
Phosphoric acid, or, volumetric concentration is the hydrogen peroxide of 120ml/L, or, volumetric concentration is the Fluohydric acid. of 300ml/L, or, body
Volume concentrations is the sulphuric acid of 200ml/L；Ethanol or acetone is used to carry out ultrasonic waves for cleaning.
Concrete, under vacuum condition or inert gas shielding, use laser-beam drilling machine to the belt pulley after the process of surface
Body punches, and carries out the pulley body after punching successively pickling, is washed to neutrality, ultrasonic waves for cleaning, is had
There is the pulley body of depression tubular body.
Step 3: the pulley body with depression tubular body is placed in vacuum cementation furnace and carries out under preset temperature
Carburizing, and be incubated according to Preset Time, obtain the pulley body with carbide layers.
Wherein, in described vacuum cementation furnace, the mass fraction of carbon is 0.9%～1.0%, the vacuum in described vacuum cementation furnace
Degree is less than or equal to 1 × 104Pa, described preset temperature is 920 DEG C～940 DEG C, and described Preset Time is 10min～35min, institute
State in the unit are of the pulley body with depression tubular body the mass fraction of carburizing less than or equal to 0.5%.
It should be noted that the preset temperature of the present invention be chosen as 920 DEG C～940 DEG C reason is that if in temperature be 940
Carburizing more than DEG C, on the one hand, carbon diffusion coefficient in pulley body can raise rapidly, and diffusion velocity is too fast, diffusion depth
Increase, be so unfavorable for the raising of tungsten carbide volume fraction in tungsten carbide enhancing；On the other hand, the tungsten carbide particle of generation can be made
Grow up rapidly, cause mechanical properties decrease；If being less than 920 DEG C carburizings in temperature, Carbon diffusion power can be reduced, cause belt
Wheel body surface concentration of carbon is relatively low.
If it should be noted that the mass fraction of the carbon of the present invention is chosen as the quality that reason is that carbon of 0.9%～1.0%
Mark is more than 1.0%, then carbon diffusion velocity in pulley body is accelerated, and diffusion depth increases, and is so unfavorable for that tungsten carbide increases
The raising of persistent erection of the penis tungsten carbide volume fraction；If the mass fraction of carbon is less than 0.9%, pulley body surface carbon concentration can be caused relatively
Low.
It should be noted that the Preset Time of the present invention be chosen as 10min～35min reason is that if temperature retention time is big
In 35min, then tungsten carbide can be concentrated to pulley body internal diffusion, is so unfavorable for keeping tungsten carbide in tungsten carbide enhancement layer
High-volume fractional；If temperature retention time is less than 10 min, then the carbon in carburized layer can not react completely, thus affect tungsten carbide and strengthen
The reinforced effects of layer.
Step 4: the pulley body with carbide layers is carried out heating quenching and temper successively, obtains that there is carbon
Change the belt pulley of tungsten enhancement layer.
Wherein, the temperature of heating quenching is 780 DEG C～820 DEG C, and the temperature of tempering is 300 DEG C～420 DEG C.
The invention provides the preparation method of a kind of belt pulley, first, under vacuum condition or inert gas shielding, use
Laser-beam drilling machine formed on the surface of pulley body several depression tubular body, and can to depression tubular body between spacing,
The degree of depth and the caliber of depression tubular body are adjusted；Then, pulley body is oozed under preset temperature and Preset Time
Carbon and insulation so that tungsten atom and carbon atom react generation tungsten carbide under solid state temperature, it is possible to according to the depression pipe accomplished fluently
Shape body limits the diffusion of tungsten carbide, it is achieved that in pulley body, tungsten carbide increases the preparation of layer, and it can be effectively increased belt
The surface recombination thickness of wheel body, improves the anti-wear performance of belt pulley and comprehensive serviceability；And the tungsten carbide in the present invention
It is metallurgical binding between granule and pulley body, is firmly combined with, tungsten carbide particle difficult drop-off；Meanwhile, can be by controlling carburizing
The regulation of Preset Time and preset temperature, laser boring parameter control the grain volume fraction of tungsten carbide enhancement layer, distribution and
Form, solves the problem that existing belt pulley wears no resistance, and improves the overall mechanical property of belt pulley and heat-resisting, wearability
Can, and preparation method is simple, it is easy to implement.
Embodiment one
Step 1: use acetone to clean up on the surface of pulley body.
Step 2: under vacuum, the pulley body after using laser-beam drilling machine to process surface is punched, and obtains
To depression tubular body, the caliber of the tubular body that wherein caves in is 30 μm, and the degree of depth of depression tubular body is 20 μm, adjacent two depression pipes
Spacing between shape body is 1000 μm, afterwards the pulley body after punching is carried out pickling, and the liquid that pickling uses is volume
Concentration is the hydrochloric acid of 300 ml/L, then rinses to neutral with water, finally uses ethanol to carry out ultrasonic waves for cleaning, obtains having depression
The pulley body of tubular body.
Step 3: be placed in vacuum cementation furnace to enter at a temperature of 920 DEG C by the pulley body with depression tubular body
Row carburizing, in vacuum cementation furnace, the mass fraction of carbon is 0.9%, and the vacuum in vacuum cementation furnace is less than or equal to 1 × 104Pa,
And ensure to have the mass fraction of carburizing in the unit are of the pulley body of depression tubular body and less than or equal to 0.5%, finally protect
Temperature 10min, obtains the pulley body with carbide layers.
Step 4: the pulley body with carbide layers is carried out heating quenching at a temperature of 780 DEG C, and at 350 DEG C
At a temperature of carry out temper, finally give the belt pulley with tungsten carbide enhancement layer.
The belt pulley that this enforcement one obtains, the thickness of its tungsten carbide enhancement layer is about 5 μm, and fundamental tissue includes that particle diameter is
The tungsten carbide particle of 0.5～1.2 μm and martensitic matrix, the volume fraction of tungsten carbide particle is 70%, the microcosmic of depression tubular body
Hardness is 1850HV, impact flexibility a of belt pulleyKReach 15J/cm2。
Embodiment two
Step 1: use acetone to clean up on the surface of pulley body.
Step 2: under noble gas argon shield, the pulley body after using laser-beam drilling machine to process surface is carried out
Punching, obtains the tubular body that caves in, and the caliber of the tubular body that wherein caves in is 20 μm, and the degree of depth of depression tubular body is 18 μm, and adjacent two
Spacing between individual depression tubular body is 25 μm, afterwards the pulley body after punching is carried out pickling, the liquid that pickling uses
Be volumetric concentration be the Fluohydric acid. of 300 ml/L, then rinse to neutral with water, finally use acetone to carry out ultrasonic waves for cleaning, obtain
There is the pulley body of depression tubular body.
Step 3: be placed in vacuum cementation furnace to enter at a temperature of 930 DEG C by the pulley body with depression tubular body
Row carburizing, in vacuum cementation furnace, the mass fraction of carbon is 1.0%, and the vacuum in vacuum cementation furnace is less than or equal to 1 × 104Pa,
And ensure to have the mass fraction of carburizing in the unit are of the pulley body of depression tubular body and less than or equal to 0.5%, finally protect
Temperature 20min, obtains the pulley body with carbide layers.
Step 4: the pulley body with carbide layers is carried out heating quenching at a temperature of 800 DEG C, and at 300 DEG C
At a temperature of carry out temper, finally give the belt pulley with tungsten carbide enhancement layer.
The belt pulley that this enforcement two obtains, the thickness of its tungsten carbide enhancement layer is about 8 μm, and fundamental tissue includes that particle diameter is
The tungsten carbide particle of 1.0～2.1 μm and martensitic matrix, the volume fraction of tungsten carbide particle is 80%, the microcosmic of depression tubular body
Hardness is 1950HV, impact flexibility a of belt pulleyKReach 14J/cm2。
Embodiment three
Step 1: use acetone to clean up on the surface of pulley body.
Step 2: under noble gas argon shield, the pulley body after using laser-beam drilling machine to process surface is carried out
Punching, obtains the tubular body that caves in, and the caliber of the tubular body that wherein caves in is 10 μm, and the degree of depth of depression tubular body is 17 μm, and adjacent two
Spacing between individual depression tubular body is 350 μm, afterwards the pulley body after punching is carried out pickling, the liquid that pickling uses
Be volumetric concentration be the sulphuric acid of 200 ml/L, then rinse to neutral with water, finally use ethanol to carry out ultrasonic waves for cleaning, had
There is the pulley body of depression tubular body.
Step 3: be placed in vacuum cementation furnace to enter at a temperature of 940 DEG C by the pulley body with depression tubular body
Row carburizing, in vacuum cementation furnace, the mass fraction of carbon is 0.94%, and the vacuum in vacuum cementation furnace is less than or equal to 1 × 104Pa,
And ensure to have the mass fraction of carburizing in the unit are of the pulley body of depression tubular body and less than or equal to 0.5%, finally protect
Temperature 35min, obtains the pulley body with carbide layers.
Step 4: the pulley body with carbide layers is carried out heating quenching at a temperature of 820 DEG C, and at 380 DEG C
At a temperature of carry out temper, finally give the belt pulley with tungsten carbide enhancement layer.
The belt pulley that this enforcement three obtains, the thickness of its tungsten carbide enhancement layer is that about 15 μm, fundamental tissue includes particle diameter
Being tungsten carbide particle and the martensitic matrix of 1.6～3.0 μm, the volume fraction of tungsten carbide particle is 95%, the micro-of tubular body of caving in
Sight hardness is 2100HV, impact flexibility a of belt pulleyKReach 10J/cm2。
Embodiment four
Step 1: use acetone to clean up on the surface of pulley body.
Step 2: under noble gas argon shield, the pulley body after using laser-beam drilling machine to process surface is carried out
Punching, obtains the tubular body that caves in, and the caliber of the tubular body that wherein caves in is 40 μm, and the degree of depth of depression tubular body is 18 μm, and adjacent two
Spacing between individual depression tubular body is 700 μm, afterwards the pulley body after punching is carried out pickling, the liquid that pickling uses
Be volumetric concentration be the hydrogen peroxide of 120 ml/L, then rinse to neutral with water, finally use ethanol to carry out ultrasonic waves for cleaning, obtain
There is the pulley body of depression tubular body.
Step 3: be placed in vacuum cementation furnace to enter at a temperature of 935 DEG C by the pulley body with depression tubular body
Row carburizing, in vacuum cementation furnace, the mass fraction of carbon is 0.98%, and the vacuum in vacuum cementation furnace is less than or equal to 1 × 104Pa,
And ensure to have the mass fraction of carburizing in the unit are of the pulley body of depression tubular body and less than or equal to 0.5%, finally protect
Temperature 30min, obtains the pulley body with carbide layers.
Step 4: the pulley body with carbide layers is carried out heating quenching at a temperature of 790 DEG C, and at 420 DEG C
At a temperature of carry out temper, finally give the belt pulley with tungsten carbide enhancement layer.
The belt pulley that this enforcement four obtains, the thickness of its tungsten carbide enhancement layer is that about 10 μm, fundamental tissue includes particle diameter
Being tungsten carbide particle and the martensitic matrix of 1.2～2.6 μm, the volume fraction of tungsten carbide particle is 88%, the micro-of tubular body of caving in
Sight hardness is 2060HV, impact flexibility a of belt pulleyKReach 12J/cm2。
A kind of belt pulley with tungsten carbide enhancement layer of the present invention, its tissue signature divides for depression tubular body uniform vertical
Being distributed in pulley body surface, the caliber of depression tubular body is 10～40 μm, and the degree of depth of depression tubular body is less than or equal to 20 μm,
Spacing between adjacent two depression tubular bodies is adjustable in 25～1000 μ m；The thickness of tungsten carbide enhancement layer is 5～15 μ
M, tungsten carbide enhancement layer includes the micron order tungsten carbide particle that equally distributed particle diameter is 0.5～3.0 μm, and volume fraction is 70%
～95%, the micro-hardness of depression tubular body can reach 1850～2100 HV, impact flexibility aKReach 10～15 J/cm2.Pass through
Prepare tungsten carbide enhancement layer on pulley body surface, can further improve intensity and the anti-wear performance of belt pulley, improve simultaneously
Belt pulley service life, it is adaptable to some technology require the production of higher belt pulley.
Finally illustrating, above example is only in order to illustrate technical scheme and unrestricted, although with reference to relatively
The present invention has been described in detail by good embodiment, it will be understood by those within the art that, can be to the skill of the present invention
Art scheme is modified or equivalent, and without deviating from objective and the scope of technical solution of the present invention, it all should be contained at this
In the middle of the right of invention.
Claims (9)
1. a belt pulley, it is characterised in that: including: pulley body, described pulley body surface is provided with multiple depression pipe
Shape body, and the inner surface of described pulley body surface and described depression tubular body is equipped with tungsten carbide enhancement layer, wherein, described
The material of pulley body includes tungsten system high-speed steel.
A kind of belt pulley the most according to claim 1, it is characterised in that: between adjacent two described depression tubular bodies
Away from for 25 μm～1000 μm, the caliber of described depression tubular body is 10 μm～40 μm, and the degree of depth of described depression tubular body is for being less than
Equal to 20 μm.
A kind of belt pulley the most according to claim 2, it is characterised in that: the thickness of described tungsten carbide enhancement layer be 5 μm～
15 μm, described tungsten carbide enhancement layer is by being evenly distributed on described pulley body surface and described depression tubular body inner surface
Tungsten carbide particle forms, and the particle diameter of described tungsten carbide particle is 0.5 μm～3.0 μm, and the volume fraction of described tungsten carbide particle is
70%～95%.
4. the preparation method of a belt pulley, it is characterised in that: comprise the following steps:
Step 1: the surface of pulley body is processed；Wherein, the material of described pulley body includes tungsten system high-speed steel；
Step 2: the pulley body after using laser-beam drilling machine to process surface is punched, and to the belt pulley after punching originally
Body carries out pickling successively, is washed to neutrality, ultrasonic waves for cleaning, obtains the pulley body with depression tubular body；
Step 3: the pulley body with depression tubular body is placed in vacuum cementation furnace and carries out carburizing under preset temperature,
And be incubated according to Preset Time, obtain the pulley body with carbide layers；
Step 4: the pulley body with carbide layers is carried out heating quenching and temper successively, obtains that there is tungsten carbide
The belt pulley of enhancement layer.
The preparation method of a kind of belt pulley the most according to claim 4, it is characterised in that: described step 1 by belt pulley
The surface of body carries out process and specifically includes:
Acetone is used to clean on the surface of described pulley body.
The preparation method of a kind of belt pulley the most according to claim 4, it is characterised in that: described step 2 uses laser
Puncher carries out punching to the pulley body after the process of surface and specifically includes:
Under vacuum condition or inert gas shielding, the pulley body after using laser-beam drilling machine to process surface carries out beating
Hole.
The preparation method of a kind of belt pulley the most according to claim 4, it is characterised in that: in described step 2, pickling uses
Liquid include the hydrochloric acid that volumetric concentration is 300 ml/L, or, volumetric concentration is the phosphoric acid of 60ml/L, or, volumetric concentration
For the hydrogen peroxide of 120ml/L, or, volumetric concentration is the Fluohydric acid. of 300ml/L, or, volumetric concentration is the sulfur of 200ml/L
Acid；
Described ultrasonic waves for cleaning specifically includes:
Ethanol or acetone is used to carry out ultrasonic waves for cleaning.
The preparation method of a kind of belt pulley the most according to claim 4, it is characterised in that: the vacuum carburization of described step 3
In stove, the mass fraction of carbon is 0.9%～1.0%, and the vacuum in described vacuum cementation furnace is less than or equal to 1 × 104Pa, described pre-
If temperature is 920 DEG C～940 DEG C, described Preset Time is 10min～35min, described in have depression tubular body belt pulley this
In the unit are of body, the mass fraction of carburizing is less than or equal to 0.5%.
The preparation method of a kind of belt pulley the most according to claim 4, it is characterised in that: heating quenching in described step 4
Temperature be 780 DEG C～820 DEG C, the temperature of tempering is 300 DEG C～420 DEG C.
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Application publication date: 20161116 |