CN107052346A - The preparation technology of powder injection forming tungsten-nickel hard alloy - Google Patents

The preparation technology of powder injection forming tungsten-nickel hard alloy Download PDF

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Publication number
CN107052346A
CN107052346A CN201611232307.XA CN201611232307A CN107052346A CN 107052346 A CN107052346 A CN 107052346A CN 201611232307 A CN201611232307 A CN 201611232307A CN 107052346 A CN107052346 A CN 107052346A
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China
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powder
hard alloy
technology
tungsten
injection forming
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CN201611232307.XA
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Chinese (zh)
Inventor
邬均文
施俊
张杨
刘春林
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Jiangsu Gian Technology Co Ltd
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Jiangsu Gian Technology Co Ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER
    • B22F3/00Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/22Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces for producing castings from a slip
    • B22F3/225Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces for producing castings from a slip by injection molding
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C1/00Making alloys
    • C22C1/04Making alloys by powder metallurgy
    • C22C1/05Mixtures of metal powder with non-metallic powder

Abstract

The invention discloses a kind of preparation technology of powder injection forming tungsten-nickel hard alloy, following steps are sequentially passed through:Feeding is configured, and WC 10Ni powder and binding agent are kneaded, WC 10Ni feedings are made;Injection moulding, feeding is injected in injector barrel, is injected in mould and shaped by nozzle of injector, and WC 10Ni injection bases are made in depanning;Degreasing, binding agent WC 10Ni injected in base is removed, and WC 10Ni degreasing bases are made;High temperature sintering, WC 10Ni degreasings bases are placed in high temperature sintering furnace and progressively heated up under protective atmosphere effect, and are incubated 2 ~ 4 hours, then cool down, obtain WC 10Ni sintered blanks.Through the above way, tungsten-nickel hard alloy made from the preparation technology of powder injection forming tungsten-nickel hard alloy of the present invention has preferable intensity and impact flexibility, can prepare shape and structure complex parts, processes parts size precision high, performance is stable, saves production cost.

Description

The preparation technology of powder injection forming tungsten-nickel hard alloy
Technical field
The present invention relates to the system of powder injection-molded technical field, more particularly to powder injection forming tungsten-nickel hard alloy Standby technique.
Background technology
With manufacturing fast-developing and technological progress, to metal appearance material requirements more and more higher, ensureing preferable Wear-resisting, corrosion-resistant and resistance to elevated temperatures while, also require that with the complex-shaped and high characteristic of dimensional accuracy.
Ordinary metallic material disclosure satisfy that the function of decorative appearance, but its behind surface or post processing, to a certain extent Wearability and decay resistance are difficult to reach more strict requirements.
Therefore the alloy coats such as wolfram steel are done on ordinary metallic material surface, to reach wear-resisting, corrosion resistant effect.WC- The wear-resisting and corrosion-resistance characteristics of 10Ni alloys, preferably meet the requirement of appearance material, but currently manufactured technique is mainly tradition Machining, powder metallurgy etc..
Wolfram steel hardness is higher simultaneously, and under state-of-the art, the hard alloy such as tungsten nickel, tungsten-cobalt mainly passes through conventional powder smelting Prepared by golden block pressing forming process, because difficulty of processing and cost are higher, and the manufacture that wolfram steel is applied to complex parts still has larger limit System.
The content of the invention
The present invention solves the technical problem of a kind of preparation technology of powder injection forming tungsten-nickel hard alloy of offer, Ensure that obtained tungsten-nickel hard alloy has preferable intensity and impact flexibility, the complicated part of shape and structure can be prepared, plus The parts size precision that work comes out is high, and performance is stable, while having saved production cost.
In order to solve the above technical problems, one aspect of the present invention is:A kind of powder injection forming tungsten is provided The preparation technology of nickel hard alloy, including following preparation process:
A, feeding configuration
WC-10Ni powder and binding agent are kneaded in banbury, WC-10Ni feedings are made;
B, injection moulding
In the barrel that WC-10Ni feedings are injected to injector, then injected in mould and shaped by nozzle of injector, depanning is made WC-10Ni injects base;
C, degreasing
WC-10Ni is injected to the binding agent removing in base, WC-10Ni degreasing bases are made;
D, high temperature sintering
WC-10Ni degreasings base is placed in high temperature sintering furnace under protective atmosphere effect and is progressively warming up to 1400 ~ 1460 DEG C, and 2 ~ 4 hours are incubated, room temperature is subsequently cooled to, obtains WC-10Ni sintered blanks.
In a preferred embodiment of the present invention, the binding agent includes vinyl-acrylate copolymer, 1- butylene/the third Alkene copolymer, paraffin, lubricant and antioxidant.
In a preferred embodiment of the present invention, the mass percent of each component is such as in the tungsten-nickel hard alloy feeding Under:WC-10Ni powder 90.40 ~ 95.89%, vinyl-acrylate copolymer 1.0 ~ 2.0%, 1- butylene/propylene copolymer 1.0 ~ 2.0%th, lubricant 0.1 ~ 0.5%, antioxidant 0.01 ~ 0.10%, surplus are paraffin.
In a preferred embodiment of the present invention, the tungsten nickel powder is made up of the component of following percentage by weight: Tungsten-carbide powder 85.0 ~ 90.0%, nickel powder 10.0 ~ 15.0%.
In a preferred embodiment of the present invention, the paraffin also can use palm wax or brazil wax to substitute.
In a preferred embodiment of the present invention, the lubricant is thermoplastic resin powder, zinc stearate or stearic acid Lithium, the antioxidant is BJ2155, B225 or B900.
In a preferred embodiment of the present invention, the step(a)In, WC-10Ni powder and binding agent are mixed, banburying Built-in temperature is controlled at 160 ~ 200 DEG C, kneads 30 ~ 60min, and banbury rotating speed is 10 ~ 30r/min.
In a preferred embodiment of the present invention, the step(b)In, injection molding process parameter is:Injection temperature 150 ~ 170 DEG C, 115 ~ 135Mpa of injection pressure, 30 ~ 50 DEG C of mould temperature, feeding powder loading 52.54 ~ 68.75%.
In a preferred embodiment of the present invention, the step(d)Middle WC-10Ni degreasings base is respectively under the conditions of 300 DEG C Insulation 30 minutes then be gradually heating to 480 DEG C and be incubated 30 minutes then be gradually heating to 650 DEG C and be incubated 30 minutes, most After be gradually heating to 1400-1460 DEG C and be incubated 120-240 minutes, finally complete sintering, obtain WC-10Ni sintered blanks.
In a preferred embodiment of the present invention, the particle size range of the WC-10Ni powder is 0.432-4.752 μm.
The beneficial effects of the invention are as follows:Tungsten nickel made from the preparation technology of powder injection forming tungsten-nickel hard alloy of the present invention There is hard alloy tungsten nickel sample after preferable intensity and impact flexibility, sintering to have higher consistency, good guarantor Shape, wearability, corrosion resistance and heat resistance, can prepare the complicated part of shape and structure, the accessory size essence processed Degree is high, and each regional part of inside parts is uniform, it is ensured that the performance of part is stable, is produced in raw material processing cost very big Economic benefit.
Brief description of the drawings
Technical scheme in order to illustrate the embodiments of the present invention more clearly, makes required in being described below to embodiment Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for For those of ordinary skill in the art, on the premise of not paying creative work, it can also obtain other according to these accompanying drawings Accompanying drawing, wherein,
Fig. 1 is the schematic flow sheet of the preparation technology of powder injection forming tungsten-nickel hard alloy of the present invention;
Fig. 2 is powder injection forming WC-10Ni metal dusts particle diameter distribution of the present invention and content schematic diagram;
The mark of each part is as follows in accompanying drawing:1st, WC-10Ni metal powder granulates particle size, 2, particle in corresponding particle size interval Percentage composition.
Embodiment
The technical scheme in the embodiment of the present invention will be clearly and completely described below, it is clear that described implementation Example is only a part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, this area is common All other embodiment that technical staff is obtained under the premise of creative work is not made, belongs to the model that the present invention is protected Enclose.
Fig. 1 to Fig. 2 is referred to, the embodiment of the present invention includes:
Embodiment one
A kind of preparation technology of powder injection forming tungsten-nickel hard alloy, including following preparation process:
A, feeding configuration
Raw material components are mixed according to following percentage by weight, WC-10Ni powder 93.60%, vinyl-acrylate copolymer 1.20%th, 1- butylene/propylene copolymer 1.20%, paraffin 3.50%, zinc stearate 0.45%, B225 0.05%.
Wherein tungsten nickel powder is mixed according to following percentage by weight:Tungsten-carbide powder 85%, nickel powder 15%, WC-10Ni The particle size range of powder is 0.432-4.752 μm.
Raw material components are mixed according to aforementioned proportion, kneaded in banbury, at 120 ~ 200 DEG C, 50min are kneaded, it is close Mill rotating speed is 25r/min, and WC-10Ni feedings are made.
B, injection moulding
By step(a)In the barrel of middle WC-10Ni feedings injection injector, then injected in mould and shaped by nozzle of injector, WC-10Ni injection bases are made in depanning, and wherein injection temperature is 155 DEG C, injection pressure 135Mpa, 40 DEG C of mould temperature, feeding powder dress Carrying capacity 52.54%.
C, degreasing
WC-10Ni is injected to the binding agent removing of base, WC-10Ni degreasing bases are made.
D, high temperature sintering
WC-10Ni degreasings base is placed in high temperature sintering furnace progressively heating and then insulation a period of time under protective atmosphere effect, Room temperature is cooled to, tungsten-nickel hard alloy is obtained, concretely comprised the following steps:
WC-10Ni degreasings base respectively under the conditions of 300 DEG C be incubated 30 minutes then be gradually heating to 480 DEG C and be incubated 30 minutes, Then 650 DEG C are gradually heating to and is incubated 30 minutes, is finally gradually heating to 1400-1460 DEG C and is incubated 120-240 minutes, Sintering is finally completed, WC-10Ni sintered blanks are obtained.
Embodiment two
A kind of preparation technology of powder injection forming tungsten-nickel hard alloy, including following preparation process:
A, feeding configuration
Raw material components are mixed according to following percentage by weight, WC-10Ni powder 94.05%, vinyl-acrylate copolymer 1.35%th, 1- butylene/propylene copolymer 1.55%, palm wax 2.75%, zinc stearate 0.28%, BJ2155 0.02%.
Wherein tungsten nickel powder is mixed according to following percentage by weight:Tungsten-carbide powder 88.5%, nickel powder 11.5%, WC- The particle size range of 10Ni powder is 0.432-4.752 μm.
Raw material components are mixed according to aforementioned proportion, kneaded in banbury, at 120 ~ 200 DEG C, 75min are kneaded, it is close Mill rotating speed is 15r/min, and WC-10Ni feedings are made.
B, injection moulding
By step(a)In the barrel of middle WC-10Ni feedings injection injector, then injected in mould and shaped by nozzle of injector, WC-10Ni injection bases are made in depanning, and wherein injection temperature is 155 DEG C, injection pressure 120Mpa, 45 DEG C of mould temperature, feeding powder dress Carrying capacity 56.69%.
C, degreasing
WC-10Ni is injected to the binding agent removing of base, WC-10Ni degreasing bases are made;
D, high temperature sintering
WC-10Ni degreasings base is placed in high temperature sintering furnace and progressively heated up under protective atmosphere effect, and is incubated 2 ~ 4 hours, Room temperature is subsequently cooled to, tungsten-nickel hard alloy is obtained, concretely comprised the following steps:
WC-10Ni degreasings base respectively under the conditions of 300 DEG C be incubated 30 minutes then be gradually heating to 480 DEG C and be incubated 30 minutes, Then 650 DEG C are gradually heating to and is incubated 30 minutes, is finally gradually heating to 1400-1460 DEG C and is incubated 120-240 minutes, Sintering is finally completed, WC-10Ni sintered blanks are obtained.
Embodiment three
A kind of preparation technology of powder injection forming tungsten-nickel hard alloy, including following preparation process:
A, feeding configuration
Raw material components are mixed according to following percentage by weight, WC-10Ni powder 91.95%, vinyl-acrylate copolymer 1.85%th, 1- butylene/propylene copolymer 1.25%, brazil wax 4.50%, lithium stearate 0.37%, B225 0.08%.
Wherein tungsten nickel powder is mixed according to following percentage by weight:Tungsten-carbide powder 90.0%, nickel powder 10.0%, WC- The particle size range of 10Ni powder is 0.432-4.752 μm.
Raw material components are mixed according to aforementioned proportion, kneaded in banbury, at 120 ~ 200 DEG C, 120min are kneaded, it is close Mill rotating speed is 30r/min, and WC-10Ni feedings are made.
B, injection moulding
By step(a)In the barrel of middle WC-10Ni feedings injection injector, then injected in mould and shaped by nozzle of injector, WC-10Ni injection bases are made in depanning, and wherein injection temperature is 170 DEG C, injection pressure 115Mpa, 50 DEG C of mould temperature, feeding powder dress Carrying capacity 68.75%.
C, degreasing
WC-10Ni is injected to the binding agent removing in base, WC-10Ni degreasing bases are made.
D, high temperature sintering
WC-10Ni degreasings base is placed in high temperature sintering furnace and progressively heated up under protective atmosphere effect, and is incubated 2 ~ 4 hours, Room temperature is subsequently cooled to, tungsten-nickel hard alloy is obtained, concretely comprised the following steps:
WC-10Ni degreasings base be incubated 30 minutes under the conditions of 300 DEG C then be gradually heating to 480 DEG C and be incubated 30 minutes, then It is gradually heating to 650 DEG C and is incubated 30 minutes, is finally gradually heating to 1400-1460 DEG C and is incubated 120-240 minutes, finally Sintering is completed, WC-10Ni sintered blanks are obtained.
WC-10Ni powder is submicron metal in embodiment 1 ~ 3, and its particle diameter distribution testing result is as shown in Fig. 2 powder Grain diameter is mainly distributed in 0.432-4.752 μ ms.
Specific performance parameter using tungsten-nickel hard alloy made from method in embodiment 1 ~ 3 is as follows:
As seen from the above table, WC-10Ni sintered densities:≥14.40g/cm3, WC-10Ni sintered material hardness:>=90HRA, WC-10Ni Shrinkage factor:14-15%, WC-10Ni bending strength:≥1800N/mm2
WC-10Ni alloys are prepared using power injection molding, selecting, sieve and mixing to WC-10Ni powder Propose strict requirements, binder system design should fully take into account the characteristic of metal dust, and injection, sintering process can Row, it is ensured that after sintering WC-10Ni alloy samples have higher consistency, good conformality, wearability, corrosion resistance and Heat resistance, and preferable outward appearance treatment effect is obtained, specific advantage is as follows:
Firstth, with preferable intensity and impact flexibility
In WC-10Ni alloys WC as main component, Ni as Binder Phase, have concurrently WC high-strength characteristic and Ni it is good tough Property, it is to prepare one of optimal material of wear-resisting, anti-corrosion parts while having excellent decay resistance;
Secondth, complicated, precision component is prepared using metal powder injection molded technique
By selecting suitable metal dust particle diameter and binder system, good feeding mobility and sintering conformality are obtained, Realize the metal powder injection molded techniques of WC-10Ni to prepare, the processing of the high part of complex-shaped, dimensional accuracy can be achieved.This Outside, metal powder injection molded each regional part of technique inside parts is uniform, it is ensured that part stability;
3rd:It is cost-effective
Using metal powder injection near-net-shape technique manufacture WC-10Ni alloy parts, appearance and size close to product final size, Substantially the waste material cost brought without conventional machining process such as machinings, can produce very big economic effect in raw material processing cost Benefit.
The beneficial effect of the preparation technology of powder injection forming tungsten-nickel hard alloy of the present invention is:
There is the tungsten-nickel hard alloy of preparation tungsten nickel sample after preferable intensity and impact flexibility, sintering to have higher cause Density, good conformality, wearability, corrosion resistance and heat resistance, and obtain preferable outward appearance treatment effect;
The complicated part of shape and structure can be prepared, the parts size precision processed is high, and each regional part of inside parts is equal It is even, it is ensured that the performance of part is stable;
The spare part outside measurement prepared using tungsten nickel close to product final size, the waste material that conventional machining process is brought into This, can produce very big economic benefit in raw material processing cost.
Embodiments of the invention are the foregoing is only, are not intended to limit the scope of the invention, it is every to utilize this hair Equivalent structure or equivalent flow conversion that bright description is made, or directly or indirectly it is used in other related technology necks Domain, is included within the scope of the present invention.

Claims (10)

1. a kind of preparation technology of powder injection forming tungsten-nickel hard alloy, it is characterised in that including following preparation process:
A, feeding configuration
WC-10Ni powder and binding agent are kneaded in banbury, WC-10Ni feedings are made;
B, injection moulding
In the barrel that WC-10Ni feedings are injected to injector, then injected in mould and shaped by nozzle of injector, depanning is made WC-10Ni injects base;
C, degreasing
WC-10Ni is injected to the binding agent removing in base, WC-10Ni degreasing bases are made;
D, high temperature sintering
WC-10Ni degreasings base is placed in high temperature sintering furnace under protective atmosphere effect and is progressively warming up to 1400 ~ 1460 DEG C, and 2 ~ 4 hours are incubated, room temperature is subsequently cooled to, obtains WC-10Ni sintered blanks.
2. the preparation technology of powder injection forming tungsten-nickel hard alloy according to claim 1, it is characterised in that described viscous Tying agent includes vinyl-acrylate copolymer, 1- butylene/propylene copolymer, paraffin, lubricant and antioxidant.
3. the preparation technology of powder injection forming tungsten-nickel hard alloy according to claim 2, it is characterised in that the tungsten The mass percent of each component is as follows in nickel hard alloy feeding:WC-10Ni powder 90.40 ~ 95.89%, ethylene-acrylate It is copolymer 1 .0 ~ 2.0%, 1- butylene/propylene copolymer 1.0 ~ 2.0%, lubricant 0.1 ~ 0.5%, antioxidant 0.01 ~ 0.10%, remaining Measure as paraffin.
4. the preparation technology of powder injection forming tungsten-nickel hard alloy according to claim 3, it is characterised in that the tungsten Ni alloy powder is made up of the component of following percentage by weight:Tungsten-carbide powder 85.0 ~ 90.0%, nickel powder 10.0 ~ 15.0%.
5. the preparation technology of powder injection forming tungsten-nickel hard alloy according to claim 3, it is characterised in that the stone Wax also can use palm wax or brazil wax to substitute.
6. the preparation technology of powder injection forming tungsten-nickel hard alloy according to claim 3, the lubricant is that heat can Plastic resin powder, zinc stearate or lithium stearate, the antioxidant are BJ2155, B225 or B900.
7. the preparation technology of powder injection forming tungsten-nickel hard alloy according to claim 1, it is characterised in that the step Suddenly(a)In, WC-10Ni powder and binding agent are mixed, temperature control kneads 30 ~ 120min at 160 ~ 200 DEG C in banbury, Banbury rotating speed is 10 ~ 30r/min.
8. the preparation technology of powder injection forming tungsten-nickel hard alloy according to claim 1, it is characterised in that the step Suddenly(b)In, injection molding process parameter is:150 ~ 170 DEG C of injection temperature, 115 ~ 135Mpa of injection pressure, 30 ~ 50 DEG C of mould temperature, Feeding powder loading 52.54 ~ 68.75%.
9. the preparation technology of powder injection forming tungsten-nickel hard alloy according to claim 1, it is characterised in that the step Suddenly(d)Middle WC-10Ni degreasings base is incubated 30 minutes under the conditions of 300 DEG C respectively and then is gradually heating to 480 DEG C and 30 points of insulation Clock and then it is gradually heating to 650 DEG C and is incubated 30 minutes, is finally gradually heating to 1400-1460 DEG C and be incubated 120-240 point Clock, finally completes sintering, and WC-10Ni sintered blanks are made.
10. according to the preparation technology of any described powder injection forming tungsten-nickel hard alloy of claim 1 ~ 9, its feature exists In the particle size range of the WC-10Ni powder is 0.432-4.752 μm.
CN201611232307.XA 2016-12-28 2016-12-28 The preparation technology of powder injection forming tungsten-nickel hard alloy Pending CN107052346A (en)

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CN108580907A (en) * 2018-06-05 2018-09-28 广东省材料与加工研究所 A kind of preparation method and parallel double-screw extruder screwing element of the surface peening layer of screwing element
CN109108267A (en) * 2018-08-03 2019-01-01 深圳市富荣新材料科技有限公司 A kind of composition, preparation method and the application in metal injection molded moulding material field
CN109136712A (en) * 2018-09-03 2019-01-04 广西冶金研究院有限公司 A kind of preparation method of the hard alloy spherical-teeth based on the molding core shell structurre of MIM
CN109338195A (en) * 2018-10-30 2019-02-15 湖南工业大学 A kind of high wearable drilling tool hard alloy and preparation method thereof
CN110080737A (en) * 2019-04-24 2019-08-02 西安迈瑞驰石油科技有限公司 A kind of underground fracture nozzle processing method
CN110480016A (en) * 2019-09-17 2019-11-22 江苏精研科技股份有限公司 A method of labyrinth function ceramics part is prepared using powder injection-molded
CN110480016B (en) * 2019-09-17 2021-11-05 江苏精研科技股份有限公司 Method for preparing functional ceramic part with complex structure by adopting powder injection molding

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CN108311695A (en) * 2018-02-13 2018-07-24 沈阳含能金属材料制造有限公司 A kind of decarbonization process of tungsten alloy blank material
CN108580907A (en) * 2018-06-05 2018-09-28 广东省材料与加工研究所 A kind of preparation method and parallel double-screw extruder screwing element of the surface peening layer of screwing element
CN109108267A (en) * 2018-08-03 2019-01-01 深圳市富荣新材料科技有限公司 A kind of composition, preparation method and the application in metal injection molded moulding material field
CN109136712A (en) * 2018-09-03 2019-01-04 广西冶金研究院有限公司 A kind of preparation method of the hard alloy spherical-teeth based on the molding core shell structurre of MIM
CN109338195A (en) * 2018-10-30 2019-02-15 湖南工业大学 A kind of high wearable drilling tool hard alloy and preparation method thereof
CN110080737A (en) * 2019-04-24 2019-08-02 西安迈瑞驰石油科技有限公司 A kind of underground fracture nozzle processing method
CN110480016A (en) * 2019-09-17 2019-11-22 江苏精研科技股份有限公司 A method of labyrinth function ceramics part is prepared using powder injection-molded
CN110480016B (en) * 2019-09-17 2021-11-05 江苏精研科技股份有限公司 Method for preparing functional ceramic part with complex structure by adopting powder injection molding

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Application publication date: 20170818