CN105970149A - Low-carbon high-tungsten alloy steel and preparation method of low-carbon high-tungsten alloy steel body - Google Patents

Low-carbon high-tungsten alloy steel and preparation method of low-carbon high-tungsten alloy steel body Download PDF

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CN105970149A
CN105970149A CN201610569374.4A CN201610569374A CN105970149A CN 105970149 A CN105970149 A CN 105970149A CN 201610569374 A CN201610569374 A CN 201610569374A CN 105970149 A CN105970149 A CN 105970149A
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low
carbon
alloy steel
tungsten alloy
tungsten
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CN105970149B (en
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钟黎声
张曦
许云华
燕映霖
赵梓源
赵娜娜
蔡小龙
陈利萍
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Xian University of Technology
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    • 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
    • C23C8/06—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 using gases
    • C23C8/08—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 using gases only one element being applied
    • C23C8/20—Carburising
    • C23C8/22—Carburising of ferrous surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/36—Removing material
    • B23K26/38—Removing material by boring or cutting
    • B23K26/382—Removing material by boring or cutting by boring
    • B23K26/389—Removing material by boring or cutting by boring of fluid openings, e.g. nozzles, jets
    • 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
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • 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
    • C23C8/02—Pretreatment of the material to be coated
    • 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
    • C21D2211/004—Dispersions; Precipitations
    • 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

Abstract

The invention discloses a low-carbon high-tungsten alloy steel and a preparation method of the low-carbon high-tungsten alloy steel body, relating to the technical field of low-carbon high-tungsten alloy steel bodies. The low-carbon high-tungsten alloy steel body comprises a low-carbon high-tungsten alloy steel body, wherein the surface of the low-carbon high-tungsten alloy steel body is provided with a plurality of sunk tube-like bodies; and the surface of the low-carbon high-tungsten alloy steel body and the internal surfaces of the sunk tube-like bodies are respectively provided with a tungsten carbide reinforcement layer. The tungsten carbide reinforcement layer can be utilized to effectively increase the surface recombination thickness of the low-carbon high-tungsten alloy steel body, thereby enhancing the wear resistance and toughness of the low-carbon high-tungsten alloy steel body.

Description

A kind of low-carbon (LC) high-tungsten alloy steel and the preparation method of low-carbon (LC) high-tungsten alloy steel body
Technical field
The present invention relates to low-carbon (LC) high-tungsten alloy steel ontology field, particularly to a kind of low-carbon (LC) high-tungsten alloy steel and the preparation method of low-carbon (LC) high-tungsten alloy steel body.
Background technology
Low-carbon (LC) high-tungsten alloy steel body is as one of most important heat-resisting alloy steel and high-speed tool steel, and it has the advantages such as high rigidity, high-wearing feature and high-fire resistance, is widely used at the industry field such as cutter, metallurgy.But, decline is obvious along with the change of size is big for the intensity of low-carbon (LC) high-tungsten alloy steel body, directly affects its service life, limits range of application.In order to overcome drawbacks described above, generally use tungsten carbide to strengthen steel-based composite material and replace low-carbon (LC) high-tungsten alloy steel body, but existing tungsten carbide strengthens the enhanced form of steel-based composite material based on granule enhancing, preparation method is based on liquid casting infiltration, powder metallurgic method, and these methods have low cost, can realize large-scale industrial production and the advantage such as part shape is unrestricted.But there is following outstanding problem in the preparation process that tungsten carbide strengthens steel-based composite material:
1) tradition technology of infiltration casting can only carry out the most compound or surface recombination to workpiece；
2), in powder metallurgical technique, use bonding agents bonding in a large number or fixed alloy powder, in causing composite, there is the defects such as a large amount of pore, slag inclusion；
3) recombination process the most externally adds the intergranular gap of hard and carries out casting and ooze or sinter, and is non-metallurgical binding between hard particles and steel matrix, and adhesion is the most weak, and granule easily comes off；
4) tradition technology of infiltration casting and powder metallurgical technique can only realize the preparation of Dispersed precipitate particle enhanced steel iron base composite material, it is impossible to obtain other more excellent reinforcement distribution mode, and uncontrollable to tungsten carbide particles sized and distribution mode.
In summary, tungsten carbide of the prior art strengthens steel-based composite material and has that compound ability is poor, tungsten carbide particle easily comes off and tungsten carbide particles sized and the shortcoming such as distribution mode is uncontrollable.
Summary of the invention
In view of this, the present invention provides a kind of low-carbon (LC) high-tungsten alloy steel and the preparation method of low-carbon (LC) high-tungsten alloy steel body, and the compound ability which solving existing composite is poor, tungsten carbide particle easily comes off and tungsten carbide particles sized and the problem such as distribution mode is uncontrollable.
The present invention solves the problems referred to above by techniques below means:
A kind of low-carbon (LC) high-tungsten alloy steel of the present invention, including: low-carbon (LC) high-tungsten alloy steel body, described low-carbon (LC) high-tungsten alloy steel body surface is provided with multiple depression tubular body, and the inner surface of described low-carbon (LC) high-tungsten alloy steel body surface and described depression tubular body is equipped with tungsten carbide enhancement layer.
Wherein, low-carbon (LC) high-tungsten alloy steel body can be the mass fraction of the carbon such as xW18Cr4V, xW14Cr4VMn, xW9Mo3Cr4V less than 0.5%, W content 6%～18% tungsten system heat-resisting alloy steel.
Further, the spacing between adjacent two described depression tubular bodies is 25 μm～1000 μm, and the caliber of described depression tubular body is 10 μm～40 μm, and 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, described tungsten carbide enhancement layer is made up of the tungsten carbide particle being evenly distributed on described low-carbon (LC) high-tungsten alloy steel body surface and described depression tubular body inner surface, 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%.
A kind of low-carbon (LC) high-tungsten alloy steel of the present invention has the advantages that
The invention provides a kind of low-carbon (LC) high-tungsten alloy steel, including low-carbon (LC) high-tungsten alloy steel body, low-carbon (LC) high-tungsten alloy steel body surface is provided with multiple depression tubular body, and the inner surface of low-carbon (LC) high-tungsten alloy steel body surface and depression tubular body is equipped with tungsten carbide enhancement layer, so, the surface recombination thickness of low-carbon (LC) high-tungsten alloy steel body can be effectively increased by tungsten carbide enhancement layer, improve anti-wear performance and the heat resistance of low-carbon (LC) high-tungsten alloy steel body.
The preparation method of a kind of low-carbon (LC) high-tungsten alloy steel of the present invention, comprises the steps: step 1: processed on the surface of low-carbon (LC) high-tungsten alloy steel body；Step 2: the low-carbon (LC) high-tungsten alloy steel body after using laser-beam drilling machine to process surface punches, and the low-carbon (LC) high-tungsten alloy steel body after punching is carried out pickling successively, is washed to neutrality, ultrasonic waves for cleaning, obtain the low-carbon (LC) high-tungsten alloy steel body with depression tubular body；Step 3: the low-carbon (LC) high-tungsten alloy steel 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 low-carbon (LC) high-tungsten alloy steel body with carbide layers；Step 4: the low-carbon (LC) high-tungsten alloy steel body with carbide layers is carried out heating quenching and temper successively, obtains the low-carbon (LC) high-tungsten alloy steel with tungsten carbide enhancement layer.
Further, the surface by low-carbon (LC) high-tungsten alloy steel body of described step 1 carries out process and specifically includes: use acetone to clean on the surface of described low-carbon (LC) high-tungsten alloy steel body.
Further; low-carbon (LC) high-tungsten alloy steel body after using laser-beam drilling machine to process surface in described step 2 carries out punching and specifically includes: under vacuum condition or inert gas shielding, and the low-carbon (LC) high-tungsten alloy steel body after using laser-beam drilling machine to process surface punches.
Further, the liquid that in described step 2, pickling uses includes the hydrochloric acid that volumetric concentration is 300 ml/L, or, volumetric concentration is the phosphoric acid of 60ml/L, or, volumetric concentration is the hydrogen peroxide of 120ml/L, or, volumetric concentration is the Fluohydric acid. of 300ml/L, 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%, and the vacuum in described vacuum cementation furnace 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, described in there is depression tubular body low-carbon (LC) high-tungsten alloy steel 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 DEG C.
The preparation method of a kind of low-carbon (LC) high-tungsten alloy steel of the present invention has the advantages that
The invention provides the preparation method of a kind of low-carbon (LC) high-tungsten alloy steel; first; under vacuum condition or inert gas shielding; use laser-beam drilling machine to form several depression tubular bodies on the surface of low-carbon (LC) high-tungsten alloy steel body, and the spacing between depression tubular body, the degree of depth of depression tubular body and caliber can be adjusted；Then, low-carbon (LC) high-tungsten alloy steel body is carried out carburizing and insulation under preset temperature and Preset Time, tungsten atom and carbon atom is made to react generation tungsten carbide under solid state temperature, and the diffusion of tungsten carbide can be limited according to the depression tubular body accomplished fluently, achieve tungsten carbide on low-carbon (LC) high-tungsten alloy steel body and increase the preparation of layer, it can be effectively increased the surface recombination thickness of low-carbon (LC) high-tungsten alloy steel body, improves the anti-wear performance of low-carbon (LC) high-tungsten alloy steel body and comprehensive serviceability；And tungsten carbide particle in the present invention and be metallurgical binding between low-carbon (LC) high-tungsten alloy steel body, it is firmly combined with, tungsten carbide particle difficult drop-off；Simultaneously, the grain volume fraction of tungsten carbide enhancement layer, distribution and form can be controlled by controlling the regulation of carburizing Preset Time and preset temperature, laser boring parameter, the compound ability solving existing composite is poor, tungsten carbide particle easily comes off and tungsten carbide particles sized and the problem such as distribution mode is uncontrollable, improve the overall mechanical property of low-carbon (LC) high-tungsten alloy steel and heat-resisting, anti-wear performance, and 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 low-carbon (LC) high-tungsten alloy steel of the present invention；
Fig. 2 is the preparation technology flow chart of a kind of low-carbon (LC) high-tungsten alloy steel of the present invention.
Detailed description of the invention
Below with reference to accompanying drawing, the present invention is described in detail, as depicted in figs. 1 and 2: a kind of low-carbon (LC) high-tungsten alloy ladle of the present embodiment includes: low-carbon (LC) high-tungsten alloy steel body, described low-carbon (LC) high-tungsten alloy steel body surface is provided with multiple depression tubular body, and the inner surface of described low-carbon (LC) high-tungsten alloy steel body surface and described depression tubular body is equipped with tungsten carbide enhancement layer.
In the present embodiment, the spacing between adjacent two described depression tubular bodies is 25 μm～1000 μm, and the caliber of described depression tubular body is 10 μm～40 μm, and the degree of depth of described depression tubular body is less than or equal to 20 μm.
In the present embodiment, the thickness of described tungsten carbide enhancement layer is 5 μm～15 μm, described tungsten carbide enhancement layer is made up of the tungsten carbide particle being evenly distributed on described low-carbon (LC) high-tungsten alloy steel body surface and described depression tubular body inner surface, 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%.
In the present embodiment, the fundamental tissue of low-carbon (LC) high-tungsten alloy steel body is any one or a few in pearlite, sorbite, bainite, martensite, austenite and ferrite.
The invention provides a kind of low-carbon (LC) high-tungsten alloy steel, including low-carbon (LC) high-tungsten alloy steel body, low-carbon (LC) high-tungsten alloy steel body surface is provided with multiple depression tubular body, and the inner surface of low-carbon (LC) high-tungsten alloy steel body surface and depression tubular body is equipped with tungsten carbide enhancement layer, so, the surface recombination thickness of low-carbon (LC) high-tungsten alloy steel body can be effectively increased by tungsten carbide enhancement layer, improve anti-wear performance and the heat resistance of low-carbon (LC) high-tungsten alloy steel body.
The preparation method of a kind of low-carbon (LC) high-tungsten alloy steel of the present invention, comprises the following steps:
Step 1: the surface of low-carbon (LC) high-tungsten alloy steel body is processed.
Concrete, use acetone to clean on the surface of described low-carbon (LC) high-tungsten alloy steel body.
Step 2: the low-carbon (LC) high-tungsten alloy steel body after using laser-beam drilling machine to process surface punches, and the low-carbon (LC) high-tungsten alloy steel body after punching is carried out pickling successively, is washed to neutrality, ultrasonic waves for cleaning, obtain the low-carbon (LC) high-tungsten alloy steel 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 the phosphoric acid of 60ml/L, or, volumetric concentration is the hydrogen peroxide of 120ml/L, or, volumetric concentration is the Fluohydric acid. of 300ml/L, or, volumetric concentration 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; low-carbon (LC) high-tungsten alloy steel body after using laser-beam drilling machine to process surface punches; and the low-carbon (LC) high-tungsten alloy steel body after punching is carried out pickling successively, is washed to neutrality, ultrasonic waves for cleaning, obtain the low-carbon (LC) high-tungsten alloy steel body with depression tubular body.
Step 3: the low-carbon (LC) high-tungsten alloy steel 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 low-carbon (LC) high-tungsten alloy steel body with carbide layers.
Wherein, in described vacuum cementation furnace, 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 × 104 Pa, described preset temperature is 920 DEG C～940 DEG C, and described Preset Time is 10min～35min, described in there is depression tubular body low-carbon (LC) high-tungsten alloy steel body unit are in 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 more than 940 DEG C carburizings, on the one hand, carbon diffusion coefficient in low-carbon (LC) high-tungsten alloy steel body can raise rapidly, diffusion velocity is too fast, diffusion depth increases, and is 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 to grow up rapidly, cause mechanical properties decrease；If being less than 920 DEG C carburizings in temperature, Carbon diffusion power can be reduced, causing low-carbon (LC) high-tungsten alloy steel body surface concentration of carbon relatively low.
It should be noted that, if the mass fraction of the carbon of the present invention is chosen as the mass fraction that reason is that carbon of 0.9%～1.0% more than 1.0%, then carbon diffusion velocity in low-carbon (LC) high-tungsten alloy steel body is accelerated, and diffusion depth increases, and is so unfavorable for the raising of tungsten carbide volume fraction in tungsten carbide enhancing；If the mass fraction of carbon is less than 0.9%, low-carbon (LC) high-tungsten alloy steel body surface concentration of carbon can be caused relatively low.
It should be noted that, if what the Preset Time of the present invention was chosen as 10min～35min reason is that temperature retention time is more than 35min, then tungsten carbide can be concentrated to low-carbon (LC) high-tungsten alloy steel body internal diffusion, is so unfavorable for keeping the high-volume fractional of tungsten carbide in tungsten carbide enhancement layer；If temperature retention time is less than 10 Min, then the carbon in carburized layer can not react completely, thus affects the reinforced effects of tungsten carbide enhancement layer.
Step 4: the low-carbon (LC) high-tungsten alloy steel body with carbide layers is carried out heating quenching and temper successively, obtains the low-carbon (LC) high-tungsten alloy steel with tungsten carbide 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 low-carbon (LC) high-tungsten alloy steel; first; under vacuum condition or inert gas shielding; use laser-beam drilling machine to form several depression tubular bodies on the surface of low-carbon (LC) high-tungsten alloy steel body, and the spacing between depression tubular body, the degree of depth of depression tubular body and caliber can be adjusted；Then, low-carbon (LC) high-tungsten alloy steel body is carried out carburizing and insulation under preset temperature and Preset Time, tungsten atom and carbon atom is made to react generation tungsten carbide under solid state temperature, and the diffusion of tungsten carbide can be limited according to the depression tubular body accomplished fluently, achieve tungsten carbide on low-carbon (LC) high-tungsten alloy steel body and increase the preparation of layer, it can be effectively increased the surface recombination thickness of low-carbon (LC) high-tungsten alloy steel body, improves the anti-wear performance of low-carbon (LC) high-tungsten alloy steel body and comprehensive serviceability；And tungsten carbide particle in the present invention and be metallurgical binding between low-carbon (LC) high-tungsten alloy steel body, it is firmly combined with, tungsten carbide particle difficult drop-off；Simultaneously, the grain volume fraction of tungsten carbide enhancement layer, distribution and form can be controlled by controlling the regulation of carburizing Preset Time and preset temperature, laser boring parameter, the compound ability solving existing composite is poor, tungsten carbide particle easily comes off and tungsten carbide particles sized and the problem such as distribution mode is uncontrollable, improve the overall mechanical property of low-carbon (LC) high-tungsten alloy steel and heat-resisting, anti-wear performance, and preparation method is simple, it is easy to implement.
Embodiment one
It is the preparation process of the 2W18Cr4V based composites with tungsten carbide enhancement layer:
Step 1: smelt 2W18Cr4V steel alloy, and to control carbon content in 2W18Cr4V steel alloy be 0.2%, uses acetone to clean up on the surface of 2W18Cr4V steel alloy.
Step 2: under vacuum, 2W18Cr4V steel alloy after using laser-beam drilling machine to process surface punches, obtain the tubular body that caves in, the caliber of tubular body of wherein caving in is 30 μm, the degree of depth of depression tubular body is 20 μm, spacing between adjacent two depression tubular bodies are 1000 μm, afterwards the 2W18Cr4V steel alloy after punching are carried out pickling, the liquid that pickling uses be volumetric concentration be 300 The hydrochloric acid of ml/L, then rinse to neutral with water, finally use ethanol to carry out ultrasonic waves for cleaning, obtain the 2W18Cr4V steel alloy body with depression tubular body.
Step 3: being placed in vacuum cementation furnace at a temperature of 920 DEG C by the 2W18Cr4V steel alloy body with depression tubular body and carry out 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 × 104 Pa, and ensure to have the mass fraction of carburizing in the unit are of the 2W18Cr4V steel alloy body of depression tubular body and less than or equal to 0.5%, be finally incubated 10min, obtain the 2W18Cr4V steel alloy body with carbide layers.
Step 4: the 2W18Cr4V steel alloy body with carbide layers is carried out heating quenching at a temperature of 780 DEG C, and carries out temper at a temperature of 350 DEG C, finally give the 2W18Cr4V alloy steel composite material with tungsten carbide enhancement layer.
The 2W18Cr4V alloy steel composite material that this enforcement one obtains, the thickness of its tungsten carbide enhancement layer is about 5 μm, fundamental tissue includes tungsten carbide particle and the martensitic matrix that particle diameter is 0.5～1.2 μm, the volume fraction of tungsten carbide particle is 70%, impact flexibility a that micro-hardness is 1850HV, 2W18Cr4V alloy steel composite material of depression tubular bodyKReach 15J/cm2。
Embodiment two
It is the preparation process of the 5W14Cr4VMn based composites with tungsten carbide enhancement layer:
Step 1: smelt 5W14Cr4VMn steel alloy, and to control carbon content in 5W14Cr4VMn steel alloy be 0.5%, uses acetone to clean up on the surface of 5W14Cr4VMn steel alloy.
Step 2: under noble gas argon shield; 5W14Cr4VMn steel alloy after using laser-beam drilling machine to process surface punches; obtain the tubular body that caves in; the caliber of tubular body of wherein caving in is 20 μm; the degree of depth of depression tubular body is 18 μm; spacing between adjacent two depression tubular bodies are 25 μm, afterwards the 5W14Cr4VMn steel alloy after punching are carried out pickling, the liquid that pickling uses be volumetric concentration be 300 The Fluohydric acid. of ml/L, then rinse to neutral with water, finally use acetone to carry out ultrasonic waves for cleaning, obtain the 5W14Cr4VMn steel alloy body with depression tubular body.
Step 3: being placed in vacuum cementation furnace at a temperature of 930 DEG C by the 5W14Cr4VMn steel alloy body with depression tubular body and carry out 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 × 104 Pa, and ensure to have the mass fraction of carburizing in the unit are of the 5W14Cr4VMn steel alloy body of depression tubular body and less than or equal to 0.5%, be finally incubated 20min, obtain the 5W14Cr4VMn steel alloy body with carbide layers.
Step 4: the 5W14Cr4VMn steel alloy body with carbide layers is carried out heating quenching at a temperature of 800 DEG C, and carries out temper at a temperature of 300 DEG C, finally give the 5W14Cr4VMn alloy steel composite material with tungsten carbide enhancement layer.
The 5W14Cr4VMn alloy steel composite material that this enforcement two obtains, the thickness of its tungsten carbide enhancement layer is about 8 μm, fundamental tissue includes tungsten carbide particle and the martensitic matrix that particle diameter is 1.0～2.1 μm, the volume fraction of tungsten carbide particle is 80%, impact flexibility a that micro-hardness is 1950HV, 5W14Cr4VMn alloy steel composite material of depression tubular bodyKReach 14J/cm2。
Embodiment three
It is the preparation process of the 2W9Mo3Cr4V based composites with tungsten carbide enhancement layer:
Step 1: smelt 2W9Mo3Cr4V steel alloy, and to control carbon content in 2W9Mo3Cr4V steel alloy be 0.2%, uses acetone to clean up on the surface of 2W9Mo3Cr4V steel alloy.
Step 2: under noble gas argon shield; 2W9Mo3Cr4V steel alloy after using laser-beam drilling machine to process surface punches; obtain the tubular body that caves in; the caliber of tubular body of wherein caving in is 10 μm; the degree of depth of depression tubular body is 17 μm; spacing between adjacent two depression tubular bodies are 350 μm, afterwards the 2W9Mo3Cr4V steel alloy after punching are carried out pickling, the liquid that pickling uses be volumetric concentration be 200 The sulphuric acid of ml/L, then rinse to neutral with water, finally use ethanol to carry out ultrasonic waves for cleaning, obtain the 2W9Mo3Cr4V steel alloy body with depression tubular body.
Step 3: being placed in vacuum cementation furnace at a temperature of 940 DEG C by the 2W9Mo3Cr4V steel alloy body with depression tubular body and carry out 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 × 104 Pa, and ensure to have the mass fraction of carburizing in the unit are of the 2W9Mo3Cr4V steel alloy body of depression tubular body and less than or equal to 0.5%, be finally incubated 35min, obtain the 2W9Mo3Cr4V steel alloy body with carbide layers.
Step 4: the 2W9Mo3Cr4V steel alloy body with carbide layers is carried out heating quenching at a temperature of 820 DEG C, and carries out temper at a temperature of 380 DEG C, finally give the 2W9Mo3Cr4V alloy steel composite material with tungsten carbide enhancement layer.
The 2W9Mo3Cr4V alloy steel composite material that this enforcement three obtains, the thickness of its tungsten carbide enhancement layer is about 15 μm, fundamental tissue includes tungsten carbide particle and the martensitic matrix that particle diameter is 1.6～3.0 μm, the volume fraction of tungsten carbide particle is 95%, impact flexibility a that micro-hardness is 2100HV, 2W9Mo3Cr4V alloy steel composite material of depression tubular bodyKReach 10J/cm2。
Embodiment four
It is the preparation process of the 5W14Cr4VMn based composites with tungsten carbide enhancement layer:
Step 1: smelt 5W14Cr4VMn steel alloy, and to control carbon content in 5W14Cr4VMn steel alloy be 0.3%, uses acetone to clean up on the surface of 5W14Cr4VMn steel alloy.
Step 2: under noble gas argon shield; 5W14Cr4VMn steel alloy after using laser-beam drilling machine to process surface punches; obtain the tubular body that caves in; the caliber of tubular body of wherein caving in is 40 μm; the degree of depth of depression tubular body is 18 μm; spacing between adjacent two depression tubular bodies are 700 μm, afterwards the 5W14Cr4VMn steel alloy after punching are carried out pickling, the liquid that pickling uses be volumetric concentration be 120 The hydrogen peroxide of ml/L, then rinse to neutral with water, finally use ethanol to carry out ultrasonic waves for cleaning, obtain the 5W14Cr4VMn steel alloy body with depression tubular body.
Step 3: being placed in vacuum cementation furnace at a temperature of 935 DEG C by the 5W14Cr4VMn steel alloy body with depression tubular body and carry out 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 × 104 Pa, and ensure to have the mass fraction of carburizing in the unit are of the 5W14Cr4VMn steel alloy body of depression tubular body and less than or equal to 0.5%, be finally incubated 30min, obtain the 5W14Cr4VMn steel alloy body with carbide layers.
Step 4: the 5W14Cr4VMn steel alloy body with carbide layers is carried out heating quenching at a temperature of 790 DEG C, and carries out temper at a temperature of 420 DEG C, finally give the 5W14Cr4VMn alloy steel composite material with tungsten carbide enhancement layer.
The 5W14Cr4VMn alloy steel composite material that this enforcement four obtains, the thickness of its tungsten carbide enhancement layer is about 10 μm, fundamental tissue includes tungsten carbide particle and the martensitic matrix that particle diameter is 1.2～2.6 μm, the volume fraction of tungsten carbide particle is 88%, impact flexibility a that micro-hardness is 2060HV, 5W14Cr4VMn alloy steel composite material of depression tubular bodyKReach 12J/cm2。
A kind of low-carbon (LC) high-tungsten alloy steel with tungsten carbide enhancement layer of the present invention, its tissue signature is distributed in low-carbon (LC) high-tungsten alloy steel body surface for depression tubular body uniform vertical, the caliber of depression tubular body is 10～40 μm, the degree of depth of depression tubular body is less than or equal to 20 μm, and the spacing between adjacent two depression tubular bodies is adjustable in 25～1000 μ m；The thickness of tungsten carbide enhancement layer is 5～15 μm, and 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%, and the micro-hardness of depression tubular body can reach 1850～2100 HV, impact flexibility aKReach 10～15 J/cm2.By preparing tungsten carbide enhancement layer at low-carbon (LC) high-tungsten alloy steel body surface, can further improve anti-wear performance and the resistance to elevated temperatures of low-carbon (LC) high-tungsten alloy steel, it is adaptable to all kinds of Wear-resistant, high-temperature resistant parts and the production of product in metallurgical industry.
Finally illustrate is, above example is only in order to illustrate technical scheme and unrestricted, although the present invention being described in detail with reference to preferred embodiment, it will be understood by those within the art that, technical scheme can be modified or equivalent, without deviating from objective and the scope of technical solution of the present invention, it all should be contained in the middle of scope of the presently claimed invention.

Claims (9)

1. a low-carbon (LC) high-tungsten alloy steel, it is characterized in that: including: low-carbon (LC) high-tungsten alloy steel body, described low-carbon (LC) high-tungsten alloy steel body surface is provided with multiple depression tubular body, and the inner surface of described low-carbon (LC) high-tungsten alloy steel body surface and described depression tubular body is equipped with tungsten carbide enhancement layer.
A kind of low-carbon (LC) high-tungsten alloy steel the most according to claim 1, it is characterized in that: the spacing between adjacent two described depression tubular bodies is 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 less than or equal to 20 μm.
A kind of low-carbon (LC) high-tungsten alloy steel the most according to claim 2, it is characterized in that: the thickness of described tungsten carbide enhancement layer is 5 μm～15 μm, described tungsten carbide enhancement layer is made up of the tungsten carbide particle being evenly distributed on described low-carbon (LC) high-tungsten alloy steel body surface and described depression tubular body inner surface, 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 low-carbon (LC) high-tungsten alloy steel, it is characterised in that: comprise the following steps:
Step 1: the surface of low-carbon (LC) high-tungsten alloy steel body is processed；
Step 2: the low-carbon (LC) high-tungsten alloy steel body after using laser-beam drilling machine to process surface punches, and the low-carbon (LC) high-tungsten alloy steel body after punching is carried out pickling successively, is washed to neutrality, ultrasonic waves for cleaning, obtain the low-carbon (LC) high-tungsten alloy steel body with depression tubular body；
Step 3: the low-carbon (LC) high-tungsten alloy steel 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 low-carbon (LC) high-tungsten alloy steel body with carbide layers；
Step 4: the low-carbon (LC) high-tungsten alloy steel body with carbide layers is carried out heating quenching and temper successively, obtains the low-carbon (LC) high-tungsten alloy steel with tungsten carbide enhancement layer.
The preparation method of a kind of low-carbon (LC) high-tungsten alloy steel the most according to claim 4, it is characterised in that: the surface by low-carbon (LC) high-tungsten alloy steel body of described step 1 carries out process and specifically includes:
Acetone is used to clean on the surface of described low-carbon (LC) high-tungsten alloy steel body.
The preparation method of a kind of low-carbon (LC) high-tungsten alloy steel the most according to claim 4, it is characterised in that: the low-carbon (LC) high-tungsten alloy steel body after using laser-beam drilling machine to process surface in described step 2 carries out punching and specifically includes:
Under vacuum condition or inert gas shielding, the low-carbon (LC) height tungsten after using laser-beam drilling machine to process surface closes
Gold steel body punches.
The preparation method of a kind of low-carbon (LC) high-tungsten alloy steel the most according to claim 4, it is characterized in that: the liquid that in described step 2, pickling uses includes the hydrochloric acid that volumetric concentration is 300 ml/L, or, volumetric concentration is the phosphoric acid of 60ml/L, or, volumetric concentration is the hydrogen peroxide of 120ml/L, or, volumetric concentration is the Fluohydric acid. of 300ml/L, or, volumetric concentration is the sulphuric acid of 200ml/L；
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 low-carbon (LC) high-tungsten alloy steel the most according to claim 4, it is characterised in that: in the vacuum cementation furnace of described step 3, 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 × 104 Pa, described preset temperature is 920 DEG C～940 DEG C, and described Preset Time is 10min～35min, described in there is depression tubular body low-carbon (LC) high-tungsten alloy steel body unit are in the mass fraction of carburizing less than or equal to 0.5%.
The preparation method of a kind of low-carbon (LC) high-tungsten alloy steel the most according to claim 4, it is characterised in that: 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 DEG C.
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