CN108620595A - Hard alloy screw nut mold with multilayered and graded structure and its manufacturing method - Google Patents
Hard alloy screw nut mold with multilayered and graded structure and its manufacturing method Download PDFInfo
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- CN108620595A CN108620595A CN201810741651.4A CN201810741651A CN108620595A CN 108620595 A CN108620595 A CN 108620595A CN 201810741651 A CN201810741651 A CN 201810741651A CN 108620595 A CN108620595 A CN 108620595A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
- B22F7/02—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/01—Selection of materials
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/02—Compacting only
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/1017—Multiple heating or additional steps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
- B22F5/007—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of moulds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
- B22F5/10—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of articles with cavities or holes, not otherwise provided for in the preceding subgroups
- B22F2005/103—Cavity made by removal of insert
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
- B22F2998/10—Processes characterised by the sequence of their steps
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
- C22C29/02—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides
- C22C29/06—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds
- C22C29/08—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds based on tungsten carbide
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- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Composite Materials (AREA)
- Powder Metallurgy (AREA)
Abstract
The invention discloses a kind of hard alloy screw nut molds and its manufacturing method with multilayered and graded structure, including toughness material matrix and the wear-resisting bed of material, the toughness material matrix has central through hole structure, the upper surface of the toughness material matrix is provided with the first wear-resisting bed of material, the central through hole structure interior surface is provided with the second wear-resisting bed of material, toughness material matrix has good impact flexibility, wear-resisting bed of material hardness is high, wearability is good, by the wear-resisting bed of material for being set to central through hole body structure surface, realize the forging function of screw nut mold, the wear-resisting bed of material for being set to toughness material body upper surface simultaneously plays a protective role to interface between layers below, high-performance carbide screw nut die life with multilayered and graded structure is long, save cemented carbide material.
Description
Technical field
The present invention relates to hard alloy technical fields, and in particular to a kind of hard alloy screw with multilayered and graded structure
Nut mold and its manufacturing method.
Background technology
Hard alloy is the material of high rigidity, high intensity, high abrasion, is obtained for extensively in the various fields of modern industry
Using.The processing of the handwares such as screw nut carries out punching press to metal bar, obtains usually using the mold of hard alloy material
Obtain hardware.The abrasion resistance properties of sintered-carbide die working face determine the service life of entire mold.Traditional hard closes
Gold shell silk nut mold integrally uses the cemented carbide material of high-wearing feature, and after die life terminates, the material of entire mold is all
Be scrapped, but damage in fact be only mould punching face superficial layer, mold material abandoned, caused together
The waste of resource.
Using the technical solution of gradient hard alloy mold, a large amount of hard alloy resource can be saved.Only rushed in mold
The superficial layer of pressure surface uses the cemented carbide material of high-wearing feature, mold material to use the cemented carbide material of high tenacity, mould
It is high to have stress surface hardness, wearability is good, and mold material has good impact flexibility.The wearability and toughness for making alloy obtain
Coordinate well, to improve the comprehensive performance and service life of hard alloy, preferably solves traditional homogeneous texture hard
Contradiction in alloy between wearability and toughness.But the material that two kinds of toughness mixture and wear-resisting mixture make material base is special
Sex differernce is big, how toughness mixture and wear-resisting mixture is pressed into screw nut mold material base, need it is effective at
Type method could be realized.
It includes collars outer layer and collars that Chinese patent CN103817150, which discloses a kind of gradient-structure type carbide roll ring,
Core, the configuration of collars outer layer is in the outer surface of collars core, in collars outer layer with there is mutual crucible zone between collars core, outside collars
The ingredient of forming component gradient between layer and collars core, collars outer layer and collars core is different, will mix the collars after wax is dried
Outer layer ball milling mixing material and mix wax drying after collars core ball milling mixing material place Min layers closed assembly powder, cold moudling be collars base
Material obtains final products through sintering.Its shortcoming is that the collars structure of the technical solution, only has ingredient terraced in the radial direction of collars
Degree, the face up cut shear when collars upper and lower surface does not have wearing layer, and collars uses, which can apply the interface of radial ingredient, to be removed
Effect, leads to collars restricted lifetime.In consideration of it, this patent proposes a kind of hard alloy screw nut with multilayered and graded structure
Mold and its manufacturing method.
Invention content
The purpose of the present invention is to provide a kind of hard alloy screw nut molds and its system with multilayered and graded structure
Method is made, specific technical solution is：
A kind of hard alloy screw nut mold with multilayered and graded structure, including toughness material matrix, the first wear-resistant material
Layer, central through hole structure and the second wear-resisting bed of material, the toughness material matrix are cylindrical shape, the upper table of the toughness material matrix
Face is provided with the first wear-resisting bed of material, and the central through hole structure runs through toughness material matrix and the first wear-resisting bed of material, and the center is logical
The second wear-resisting bed of material is provided in pore structure.
The full-size of first wear-resisting bed of material cross section outer profile is equal to the cross-sectional diameter of toughness material matrix.
The outer profile of the second wear-resisting bed of material cross section is round either polygon or is surrounded by straight line and camber line
Form either straight line and curve surround either multistage camber line surround either camber line surrounded with curve or
Multistage curve or straight line, camber line and curve surround.
The longitudinal profile profile of the second wear-resisting bed of material and toughness material matrix combination interface is multistage straight line, or by straight
Either either multistage camber line forms either camber line and curve composition or multistage to straight line to line with curve composition with camber line composition
Curve or straight line, camber line and curve form.
The full-size of first wear-resisting bed of material cross section outer profile is less than the cross-sectional diameter of toughness material matrix, described
The outer profile of first wear-resisting bed of material cross section is either surrounded with camber line by straight line for round either polygon or straight line
With curve surround either multistage camber line surround either camber line and curve surround either multistage curve or
Straight line, camber line and curve surround.
The first wear-resisting bed of material is set to the top surface of toughness material matrix, or is set to the top surface and bottom of toughness material matrix simultaneously
Face.
A kind of hard alloy screw nut mould manufacturing method with multilayered and graded structure, includes the following steps：
(1) toughness material matrix material base is molded：First die sleeve is placed into from the bottom opening of circular ring shape outer mold described
Inside circular ring shape outer mold, and ensure that the two bottom end is concordant；First plug is inserted into the centre bore of the first die sleeve, and ensures two
Person bottom end is concordant；Weigh Talide toughness mixture, Talide toughness mixture by WC powder, Co powder and
Cr3C2Powder is constituted and WC powder diameters are 6-16 μm, is filled into the space between circular ring shape outer mold inner wall and the first plug, is shaken
It is dynamic that Talide toughness mixture is uniformly filled；Second die sleeve is placed from the open top of circular ring shape outer mold
Into the circular ring shape outer mold, and the first plug is allowed to be passed through out of the second die sleeve centre bore；Apply at the top of from the second die sleeve
Pressure is forced into 2Mpa and is kept for 2~3 seconds, then unloads and be depressed into atmospheric pressure, and then repressurization was to 10MPa holdings 2~3 seconds, again
It unloads and is depressed into atmospheric pressure；The second die sleeve is taken out, the first plug, the first die sleeve, molding toughness material matrix material base are retained in circle
In annular outer mold.
(2) first wear-resistant material formable layers：The wear-resisting mixture of Talide is weighed, Talide is wear-resisting mixed
Conjunction material is made of WC powder, Co powder and VC powder and WC powder diameters are 0.6-6 μm, is filled into toughness material matrix material base upper surface and first
Between plug in space, vibrations are so that the wear-resisting mixture of Talide is uniformly filled；By the second die sleeve outside circular ring shape
The open top of mold is placed into the circular ring shape outer mold, and the first plug is allowed to be passed through out of the second die sleeve centre bore；
Apply pressure at the top of the second die sleeve, 4~5MPa of pressurization is kept for 2~3 seconds, then unloads and be depressed into atmospheric pressure, then repressurization 4~
5MPa is kept for 2~3 seconds, is then unloaded and is depressed into atmospheric pressure, and then repressurization 10MPa is kept for 5 seconds, then is unloaded and be depressed into atmospheric pressure；It takes
The first die sleeve is walked, applies pressure from the second die sleeve top, by the first plug and material base overall time from circular ring shape outer mold
First plug is extracted from the centre bore of material base, obtains the first material base after molding by ejection.
(3) second wear-resistant material stratifications enter：By the wear-resisting mixture merging molding of the Talide of the second wear-resisting bed of material
In the first material base central through hole structure afterwards, upper surface is ground smooth.
(4) sintering includes multistage heat preservation sintering process, respectively：
Pre-burning degreasing：In 250 DEG C~450 DEG C of temperature range, it is sintered 3~5 hours；
Sintering stage：In 450 DEG C~1200 DEG C of temperature range, it is sintered 5~8 hours；
Sintering consolidates formative stage：In 1400 DEG C~1500 DEG C of temperature range, it is sintered 1~2 hour.
It is further preferred that sintering includes multistage heat preservation sintering process, respectively：
Pre-burning degreasing：In 250 DEG C~450 DEG C of temperature range, it is sintered 3~5 hours；
It is sintered the primary stage：In 450 DEG C~800 DEG C of temperature range, it is sintered 3~5 hours；
Sintering shrinkage formative stage：In 1000 DEG C~1200 DEG C of temperature range, it is sintered 2~3 hours；
Sintering consolidates formative stage：In 1400 DEG C~1450 DEG C of temperature range, it is sintered 1~2 hour.
The preferred sintering scheme carries out the organic matter in the wear-resisting mixture of Talide in the sintering primary stage
Adequately decompose discharge so that end article consistency higher has higher mechanical performance.
Technical scheme of the present invention has the following advantages that：
Toughness material matrix has good impact flexibility, and wear-resisting bed of material hardness is high, and wearability is good, logical by the center that is set to
The wear-resisting bed of material of pore structure inner surface, realizes the forging function of screw nut mold, while being set to toughness material body upper surface
The wear-resisting bed of material play a protective role to interface between layers below, with multilayered and graded structure hard alloy screw
Nut mold saves wear-resistant material layer material, long lifespan.
Description of the drawings
The toughness material matrix material base shaping schematic view of Fig. 1 embodiment of the present invention one.
First wear-resistant material formable layer schematic diagram of Fig. 2 embodiment of the present invention one.
First material base schematic diagram of Fig. 3 embodiment of the present invention one.
The hard alloy screw nut mold vertical section signal with multilayered and graded structure of Fig. 4 embodiment of the present invention one
Figure.
The hard alloy screw nut mold cross section signal with multilayered and graded structure of Fig. 5 embodiment of the present invention one
Figure.
The hard alloy screw nut mold cross section signal with multilayered and graded structure of Fig. 6 embodiment of the present invention two
Figure.
The hard alloy screw nut mold vertical section signal with multilayered and graded structure of Fig. 7 embodiment of the present invention two
Figure.
The hard alloy screw nut mold cross section signal with multilayered and graded structure of Fig. 8 embodiment of the present invention three
Figure.
The hard alloy screw nut mold vertical section signal with multilayered and graded structure of Fig. 9 embodiment of the present invention three
Figure.
The hard alloy screw nut mold cross section signal with multilayered and graded structure of Figure 10 embodiment of the present invention four
Figure.
The hard alloy screw nut mold cross section signal with multilayered and graded structure of Figure 11 embodiment of the present invention five
Figure.
The hard alloy screw nut mold vertical section signal with multilayered and graded structure of Figure 12 embodiment of the present invention five
Figure.
The hard alloy screw nut mold cross section signal with multilayered and graded structure of Figure 13 embodiment of the present invention six
Figure.
The hard alloy screw nut mold vertical section signal with multilayered and graded structure of Figure 14 embodiment of the present invention six
Figure.
The hard alloy screw nut mold vertical section signal with multilayered and graded structure of Figure 15 embodiment of the present invention seven
Figure.
The hard alloy screw nut mold schematic top plan view with multilayered and graded structure of Figure 16 embodiment of the present invention seven.
The hard alloy screw nut mold cross section signal with multilayered and graded structure of Figure 17 embodiment of the present invention eight
Figure.
The hard alloy screw nut mold vertical section signal with multilayered and graded structure of Figure 18 embodiment of the present invention nine
Figure.
Specific implementation mode
The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention..
Embodiment one
It please refers to Fig.1 to Fig. 5, a kind of hard alloy screw nut mold with multilayered and graded structure, which is characterized in that
Including toughness material matrix 4, the first wear-resisting bed of material 91, central through hole structure 10 and the second wear-resisting bed of material 92, the toughness material matrix 4
Upper surface for cylindrical shape, the toughness material matrix 4 is provided with the first wear-resisting bed of material 91, and the central through hole structure 10 is passed through
Toughness material matrix 4 and the first wear-resisting bed of material 91 are worn, the second wear-resisting bed of material 92 is provided in the central through hole structure 10.
The thickness of the first wear-resisting bed of material, the 91 and second wear-resisting bed of material 92 is 2mm.
The outer profile of the second wear-resisting bed of material, 92 cross section is circle.The first wear-resisting bed of material, 91 cross section outer profile
It is equal to the cross-sectional diameter of toughness material matrix 4 for round and diameter.
The longitudinal profile profile of the second wear-resisting bed of material 92 and 4 combination interface of toughness material matrix is straight line.
A kind of hard alloy screw nut mould manufacturing method with multilayered and graded structure, includes the following steps：
(1) toughness material matrix material base is molded：First die sleeve 5 is placed into institute from the bottom opening of circular ring shape outer mold 1
It states inside circular ring shape outer mold 1, and ensures that the two bottom end is concordant；First plug 3 is inserted into the centre bore of the first die sleeve 5, and
Ensure that the two bottom end is concordant；Weigh Talide toughness mixture, Talide toughness mixture by WC powder,
Co powder and Cr3C2Powder is constituted and WC powder diameters are 11 μm, is filled into the space between 1 inner wall of circular ring shape outer mold and the first plug 3
Interior, vibrations are so that Talide toughness mixture is uniformly filled；By the second die sleeve 2 from the top of circular ring shape outer mold 1
Opening is placed into the circular ring shape outer mold 1, and the first plug 3 is allowed to be passed through out of the second die sleeve 2 centre bore；From the second mould
2 top of set applies pressure, is forced into 2Mpa and is kept for 2 ± 1 seconds, then unload and be depressed into atmospheric pressure, then repressurization to 10MPa is kept
It 2 ± 1 seconds, unloads be depressed into atmospheric pressure again；The second die sleeve 2 is taken out, by the first plug 3, the first die sleeve 5, molding toughness material base
Body material base is retained in circular ring shape outer mold.
(2) first wear-resistant material formable layers：The wear-resisting mixture of Talide is weighed, Talide is wear-resisting mixed
Conjunction material is made of WC powder, Co powder and VC powder and WC powder diameters are 3 μm, is filled into toughness material matrix material base upper surface and the first plug
Between 3 in space, vibrations are so that the wear-resisting mixture of Talide is uniformly filled；By the second die sleeve 2 from circular ring shape external mold
The open top of tool 1 is placed into the circular ring shape outer mold 1, and the first plug 3 is allowed to be worn out of the second die sleeve 2 centre bore
It crosses；Apply pressure from 2 top of the second die sleeve, 4 ± 1MPa of pressurization is kept for 2 ± 1 seconds, then unloads and be depressed into atmospheric pressure, then added again
It presses 4 ± 1MPa to be kept for 2 ± 1 seconds, then unloads and be depressed into atmospheric pressure, then repressurization 10MPa is kept for 5 seconds, then is unloaded and be depressed into atmospheric pressure
Power；It takes the first die sleeve 5 away, applies pressure from the top of the second die sleeve 2, by the first plug 3 and material base overall time from circular ring shape
It is ejected in outer mold 1, the first plug 3 is extracted from the centre bore of material base, obtains the first material base after molding.
(3) second wear-resistant material stratifications enter：The tungsten carbide hard of the second wear-resisting bed of material of prefabricated profiled concentric cylindrical is closed
The wear-resisting mixture green body of gold, fills in the central through hole structure of the first material base after molding, upper surface is ground smooth.
(4) sintering includes multistage heat preservation sintering process, respectively：
Pre-burning degreasing：In 250 DEG C of temperature, it is sintered 5 hours；
Sintering stage：In 1200 DEG C of temperature, it is sintered 8 hours；
Sintering consolidates formative stage：In 1500 DEG C of temperature, it is sintered 2 hours.
Embodiment two
Please refer to Fig. 6 to Fig. 7, the present embodiment and embodiment one the difference is that, the first wear-resisting bed of material 91 and second
The maximum gauge of the wear-resisting bed of material 92 is 8mm, and the outer profile of the second wear-resisting bed of material, 92 cross section is polygon, and described second is resistance to
The longitudinal profile profile of abrasive material 92 and 4 combination interface of toughness material matrix is multi-section-line, and the merging of the second wear-resisting bed of material 92 uses will
The prefabricated profiled second wear-resisting bed of material with central through hole of the wear-resisting mixture of Talide is inserted into the first material base.Carbon
Change tungsten hard alloy toughness mixture by WC powder, Co powder and Cr3C2Powder is constituted and WC powder diameters are 6 μm, and Talide is resistance to
Mill mixture is made of WC powder, Co powder and VC powder and WC powder diameters are 0.6 μm.
Sintering includes multistage heat preservation sintering process, respectively：
Pre-burning degreasing：In 450 DEG C of temperature, it is sintered 3 hours；
Sintering stage：In 1200 DEG C of temperature, it is sintered 5 hours；
Sintering consolidates formative stage：In 1400 DEG C DEG C of temperature, it is sintered 1 hour.
Remaining is identical.
Embodiment three
Please refer to Fig. 8 to Fig. 9, the present embodiment and embodiment one the difference is that, the first wear-resisting bed of material 91 and second
The maximum gauge of the wear-resisting bed of material 92 is 5mm, the outer profile of the second wear-resisting bed of material, 92 cross section surrounded by straight line and camber line and
At, the longitudinal profile profile of the second wear-resisting bed of material 92 and 4 combination interface of toughness material matrix is made of straight line and camber line, and second
The merging process of the wear-resisting bed of material 92 is：Second plug is inserted into the first material base central through hole and ensures its centre symmetry line and the
It is overlapped in one material base central through hole, the second wear-resisting wear-resisting mixture powder of bed of material Talide is inserted in the first material base
It between heart through-hole and the second plug and is compacted, then extracts the second plug.Talide toughness mixture is by WC powder, Co
Powder and Cr3C2Powder is constituted and WC powder diameters are 16 μm, and the wear-resisting mixture of Talide is made of WC powder, Co powder and VC powder
And WC powder diameters are 6 μm.
Sintering includes multistage heat preservation sintering process, respectively：
Pre-burning degreasing：In 250 DEG C of temperature, it is sintered 5 hours；
It is sintered the primary stage：In 800 DEG C of temperature, it is sintered 5 hours；
Sintering shrinkage formative stage：In 1000 DEG C of temperature, it is sintered 3 hours；
Sintering consolidates formative stage：In 1450 DEG C of temperature, it is sintered 2 hours.
Remaining is identical.
Example IV
Referring to FIG. 10, the present embodiment and embodiment one the difference is that, the first wear-resisting bed of material 91 and second is wear-resisting
The maximum gauge of the bed of material 92 is 4mm, and the outer profile of the second wear-resisting bed of material, 92 cross section is that straight line is surrounded with curve.Carbon
Change tungsten hard alloy toughness mixture by WC powder, Co powder and Cr3C2Powder is constituted and WC powder diameters are 14 μm, Talide
Wear-resisting mixture is made of WC powder, Co powder and VC powder and WC powder diameters are 1 μm.
Sintering includes multistage heat preservation sintering process, respectively：
Pre-burning degreasing：In 350 DEG C of temperature, it is sintered 4 hours；
Sintering stage：In 750 DEG C of temperature, it is sintered 7 hours；
Sintering consolidates formative stage：In 1450 DEG C of temperature, it is sintered 1.5 hours.
Remaining is identical.
Embodiment five
Please refer to Fig.1 1 to Figure 12, the present embodiment and embodiment one the difference is that, the first wear-resisting bed of material 91 and the
The maximum gauge of the two wear-resisting bed of materials 92 is 5mm, the outer profile of the second wear-resisting bed of material, 92 cross section surrounded by multistage camber line and
At, the longitudinal profile profile of the second wear-resisting bed of material 92 and 4 combination interface of toughness material matrix is made of straight line and curve, and second
The merging process of the wear-resisting bed of material 92 is：Second plug is inserted into the first material base central through hole and ensures its centre symmetry line and the
It is overlapped in one material base central through hole, the second wear-resisting wear-resisting mixture powder of bed of material Talide is inserted in the first material base
It between heart through-hole and the second plug and is compacted, then extracts the second plug.Talide toughness mixture is by WC powder, Co
Powder and Cr3C2Powder constitute and WC powder diameters be 7 μm, the wear-resisting mixture of Talide be made of WC powder, Co powder and VC powder and
WC powder diameters are 5 μm.
Sintering includes multistage heat preservation sintering process, respectively：
Pre-burning degreasing：In 450 DEG C of temperature, it is sintered 3 hours；
It is sintered the primary stage：In 600 DEG C of temperature, it is sintered 3 hours；
Sintering shrinkage formative stage：In 1200 DEG C of temperature, it is sintered 2 hours；
Sintering consolidates formative stage：In 1400 DEG C of temperature, it is sintered 1 hour.
Remaining is identical.
Embodiment six
Please refer to Fig.1 3 to Figure 14, the present embodiment and embodiment one the difference is that, the first wear-resisting bed of material 91 and the
The maximum gauge of the two wear-resisting bed of materials 92 is 5mm, and the outer profile of the second wear-resisting bed of material, 92 cross section is by straight line, camber line and curve
It surrounds, the longitudinal profile profile of the second wear-resisting bed of material 92 and 4 combination interface of toughness material matrix is by straight line, camber line and song
Line forms, and the first wear-resisting bed of material 91 is set to the upper and lower surface of toughness material matrix 4, the merging of the second wear-resisting bed of material 92
Cheng Wei：Second plug is inserted into the first material base central through hole and ensures its centre symmetry line and weight in the first material base central through hole
Close, by the wear-resisting mixture powder of the second wear-resisting bed of material Talide insert the first material base central through hole and the second plug it
Between and be compacted, then extract the second plug..
Remaining is identical.Talide toughness mixture is by WC powder, Co powder and Cr3C2Powder is constituted and WC powder diameters are
15 μm, the wear-resisting mixture of Talide is made of WC powder, Co powder and VC powder and WC powder diameters are 2 μm.
Sintering includes multistage heat preservation sintering process, respectively：
Pre-burning degreasing：In 350 DEG C of temperature range, it is sintered 4 hours；
It is sintered the primary stage：In 700 DEG C of temperature, it is sintered 4 hours；
Sintering shrinkage formative stage：In 1150 DEG C of temperature, it is sintered 2.5 hours；
Sintering consolidates formative stage：In 1400 DEG C of temperature, it is sintered 1.5 hours.
Embodiment seven
Please refer to Fig.1 5 to 16, the present embodiment and embodiment one the difference is that, the first wear-resisting bed of material, 91 cross section
The full-size of outer profile is less than the outer diameter of toughness material matrix 4, and the outer profile of the first wear-resisting bed of material, 91 cross section is polygon
Shape.Talide toughness mixture is by WC powder, Co powder and Cr3C2Powder is constituted and WC powder diameters are 9 μm, tungsten carbide hard
Alloy wear-resisting mixture is made of WC powder, Co powder and VC powder and WC powder diameters are 1 μm.
Remaining is identical.
Embodiment eight
Please refer to Fig.1 7, the present embodiment and embodiment one the difference is that, the second wear-resisting bed of material, 92 cross section it is interior
Surface profile is polygon.Remaining is identical.
Embodiment nine
Please refer to Fig.1 8, the present embodiment and embodiment one the difference is that, the hard conjunction with multilayered and graded structure
Gold shell silk nut mold outer profile is frustum cone structure, and the outer profile of longitudinal section is trapezoidal, and the first wear-resisting bed of material 91 is set to
The top surface of round platform.Remaining is identical.
Although above having used general explanation and specific embodiment, the present invention is described in detail, at this
On the basis of invention, it can be made some modifications or improvements, this will be apparent to those skilled in the art.Therefore,
These modifications or improvements without departing from theon the basis of the spirit of the present invention belong to the scope of protection of present invention.
Claims (7)
1. a kind of hard alloy screw nut mold with multilayered and graded structure, which is characterized in that include toughness material matrix, the
The one wear-resisting bed of material, central through hole structure and the second wear-resisting bed of material, the toughness material matrix are cylindrical shape, the toughness material base
The upper surface of body is provided with the first wear-resisting bed of material, and the central through hole structure runs through toughness material matrix and the first wear-resisting bed of material, institute
It states central through hole inner structural wall and is provided with the second wear-resisting bed of material.
2. the hard alloy screw nut mold with multilayered and graded structure as described in claim 1, which is characterized in that described the
The full-size of one wear-resisting bed of material cross section outer profile is equal to the cross-sectional diameter of toughness material matrix.
3. the hard alloy screw nut mold with multilayered and graded structure as described in claim 1, which is characterized in that described the
The outer profile of two wear-resisting bed of material cross sections be round either polygon either surrounded with camber line by straight line or straight line and
Curve surrounds either multistage camber line and surrounds either camber line to be surrounded or multistage curve with curve, Huo Zhezhi
Line, camber line and curve surround.
4. the hard alloy screw nut mold with multilayered and graded structure as described in claim 1, which is characterized in that described the
The longitudinal profile profile of the two wear-resisting bed of materials and toughness material matrix combination interface is multistage straight line, or is made of straight line and camber line,
Either straight line and curve form either multistage camber line composition either camber line and curve form either multistage curve or straight line,
Camber line is formed with curve.
5. the hard alloy screw nut mold with multilayered and graded structure as described in claim 1, which is characterized in that described the
The full-size of one wear-resisting bed of material cross section outer profile is less than the cross-sectional diameter of toughness material matrix, and the first wear-resisting bed of material is horizontal
The outer profile in section be round either polygon either surrounded with camber line by straight line or straight line and curve encirclement and
Either camber line, which is surrounded, at either multistage camber line surrounds either multistage curve or straight line, camber line and song with curve
Line surrounds.
6. the hard alloy screw nut mold according to any one of claims 1 to 5 with multilayered and graded structure,
It is characterized in that, the first wear-resisting bed of material is set to the top surface of toughness material matrix, or it is set to the top surface of toughness material matrix simultaneously
The bottom surface and.
7. a kind of hard alloy screw nut mould manufacturing method with multilayered and graded structure, which is characterized in that including following
Step：
(1) toughness material matrix material base is molded：First die sleeve is placed into the annulus from the bottom opening of circular ring shape outer mold
Inside shape outer mold, and ensure that the two bottom end is concordant；First plug is inserted into the centre bore of the first die sleeve, and ensures the two bottom
Hold level with both hands neat；Talide toughness mixture is weighed, Talide toughness mixture is by WC powder, Co powder and Cr3C2
Powder is constituted and WC powder diameters are 6-16 μm, is filled into the space between circular ring shape outer mold inner wall and the first plug, vibrations make
Talide toughness mixture is obtained uniformly to fill；Second die sleeve is placed into from the open top of circular ring shape outer mold
The circular ring shape outer mold, and the first plug is allowed to be passed through out of the second die sleeve centre bore；Apply pressure at the top of from the second die sleeve,
It is forced into 2Mpa to be kept for 2~3 seconds, then unloads and be depressed into atmospheric pressure, then repressurization to 10MPa is kept for 2~3 seconds, release again
To atmospheric pressure；The second die sleeve is taken out, the first plug, the first die sleeve, molding toughness material matrix material base are retained in circular ring shape
In outer mold.
(2) first wear-resistant material formable layers：Weigh the wear-resisting mixture of Talide, the wear-resisting mixture of Talide
It is made of WC powder, Co powder and VC powder and WC powder diameters is 0.6-6 μm, be filled into toughness material matrix material base upper surface and the first plug
Between in space, vibrations are so that the wear-resisting mixture of Talide is uniformly filled；By the second die sleeve from circular ring shape outer mold
Open top be placed into the circular ring shape outer mold, and the first plug is allowed to be passed through out of the second die sleeve centre bore；From
Apply pressure at the top of two die sleeves, 4~5MPa of pressurization is kept for 2~3 seconds, then unloads and be depressed into atmospheric pressure, then 4~5MPa of repressurization
It is kept for 2~3 seconds, then unloads and be depressed into atmospheric pressure, then repressurization 10MPa is kept for 5 seconds, then is unloaded and be depressed into atmospheric pressure；Take away
One die sleeve applies pressure from the second die sleeve top, the first plug and material base overall time is ejected from circular ring shape outer mold,
First plug is extracted from the centre bore of material base, obtains the first material base after molding.
(3) second wear-resistant material stratifications enter：The wear-resisting mixture merging of the Talide of the second wear-resisting bed of material is after molding
In the central through hole structure of first material base, upper surface is ground smooth.
(4) it is sintered：In 250 DEG C~450 DEG C of temperature range, it is sintered 3~5 hours；It is warming up to 450 DEG C~1200 DEG C of temperature again
Section is sintered 5~8 hours；It then proceedes to be warming up to 1400 DEG C~1500 DEG C of temperature range, is sintered 1~2 hour.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2018/099317 WO2019192114A1 (en) | 2018-04-03 | 2018-08-08 | Cemented carbide screw nut mold having multi-layer graded structure and manufacturing method therefor |
| EP18913306.9A EP3650136A4 (en) | 2018-04-03 | 2018-08-08 | Cemented carbide screw nut mold having multi-layer graded structure and manufacturing method therefor |
| TW107136011A TWI669175B (en) | 2018-04-03 | 2018-10-12 | A hard alloy screw nut mold having multi-layer gradient structure and thereof method |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810303648 | 2018-04-03 | ||
| CN2018103036484 | 2018-04-03 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108620595A true CN108620595A (en) | 2018-10-09 |
| CN108620595B CN108620595B (en) | 2019-06-04 |
Family
ID=63688774
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810741651.4A Active CN108620595B (en) | 2018-04-03 | 2018-07-09 | Hard alloy screw nut mold and its manufacturing method with multilayered and graded structure |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP3650136A4 (en) |
| CN (1) | CN108620595B (en) |
| TW (1) | TWI669175B (en) |
| WO (1) | WO2019192114A1 (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| EP3650136A1 (en) | 2020-05-13 |
| TWI669175B (en) | 2019-08-21 |
| EP3650136A4 (en) | 2020-07-08 |
| WO2019192114A1 (en) | 2019-10-10 |
| TW201941850A (en) | 2019-11-01 |
| CN108620595B (en) | 2019-06-04 |
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Address after: 361000 6th floor of plant 1, No. 21, Ma Luan Road, Jimei District, Xiamen City, Fujian Province Patentee after: Xinjingrui tungsten steel (Fujian) Co.,Ltd. Address before: 361000 6th floor of plant 1, No. 21, Ma Luan Road, Jimei District, Xiamen City, Fujian Province Patentee before: XINJINGRUI TUNGSTEN STEEL (XIAMEN) Co.,Ltd. |
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