CN107214332B - A kind of titanium hydride powders injection moulding feeding product and preparation method thereof - Google Patents
A kind of titanium hydride powders injection moulding feeding product and preparation method thereof Download PDFInfo
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- CN107214332B CN107214332B CN201710426580.4A CN201710426580A CN107214332B CN 107214332 B CN107214332 B CN 107214332B CN 201710426580 A CN201710426580 A CN 201710426580A CN 107214332 B CN107214332 B CN 107214332B
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- injection moulding
- binder
- titanium hydride
- hydride powders
- feeding product
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Classifications
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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
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
-
- 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
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
- B22F1/103—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material containing an organic binding agent comprising a mixture of, or obtained by reaction of, two or more components other than a solvent or a lubricating agent
-
- 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
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/14—Treatment of metallic powder
-
- 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
- B22F3/22—Manufacture 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
- B22F3/225—Manufacture 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
Abstract
The present invention relates to a kind of titanium hydride powders injection moulding feeding products.Its raw material is made of binder and titanium hydride powders, it is characterised in that: the binder accounts for the 10%~15% of the feeding product gross mass；The binder is made of solid paraffin, atoleine, polypropylene, rare earth, stearic acid and ethylene-vinyl acetate copolymer；The mass percentage of the binder each component is respectively solid paraffin 30%~50%, atoleine 10%~20%, polypropylene 35%~40%, rare earth 1%~5%, stearic acid 2%~10% and ethylene-vinyl acetate copolymer 1%~5%.Solvent debinding rate is high during feeding product injection moulding in the present invention, and prepared degreased blank defect is few, conformality is good, porosity is suitable, and can guarantee that finished product has excellent tissue and mechanical property.
Description
Technical field
The present invention relates to Metal Injection Molding fields more particularly to a kind of titanium hydride powders injection moulding to be produced with feeding
Product and preparation method thereof.
Background technique
Titanium powder injection moulding (Ti-MIM) technology, can manufacture the titanium parts of near-net-shape, complicated shape, can overcome titanium
Product machining difficulty and the big problem of machining allowance, therefore be widely used.Use cheap titantium hydride (TiH2) powder
Raw material powder of the end as injection moulding, and the binder system for developing new and effective injection moulding is to reduce production cost
With the effective way enhanced product performance.
Currently, conventional titanium hydride powders injection moulding feeding product, exists significantly not during injection moulding
Foot: 1, binder poor compatibility selected in feeding product form, gained feeding processing fluidity in injection moulding is poor, note
There is the defects of bubble, overlap during penetrating.2, prepared blank solvent debinding rate is low, and degreasing time is long, temperature is high, usually
For at 60 DEG C~80 DEG C, degreasing 10~for 24 hours, and degreased blank defect is more, conformality is poor.3, blank fragment is although with higher
Degreasing rate, but also just because of its degreasing rate is high, gained degreased blank haves the defects that hole is big, porosity is high in use, in turn
It is lower to cause the performances such as degreased blank density and intensity, causes finished product performance not high.4, crystal grain is easy during injection moulding
It grows up, the sintered blank after vacuum-sintering has deformation more, and rough, there is bubbling, and dimensional accuracy and surface accuracy be not high, causes
Many performances such as the density of obtained finished product are made to need to be further increased, for example, using conventional feeding product through injection moulding
Obtained titanium products afterwards, relative density (%) are 97.95~98.96, and hardness (HV) is 380~388, yield strength
It (MPa) is 254~264, tensile strength (MPa) is 325~346, and elongation percentage (%) is 18~20.
Summary of the invention
The first object of the present invention is to provide a kind of titanium hydride powders injection moulding feeding product, feeding product note
Solvent debinding rate height in forming process is penetrated, prepared degreased blank defect is few, conformality is good, porosity is suitable, and can guarantee end
Product has excellent tissue and mechanical property.
Another object of the present invention is to provide the preparation methods of above-mentioned titanium hydride powders injection moulding feeding product, should
Preparation method has apparatus and process and operation is simple, and it is many a little to be easy to industrialization etc..
What the first object of the present invention was realized particular by following technical scheme:
A kind of titanium hydride powders injection moulding feeding product, raw material are made of binder and titanium hydride powders, special
Sign is: the binder accounts for the 10%~15% of the feeding product gross mass；The binder is by solid paraffin (PW), liquid
Body paraffin (LPW), polypropylene (PP), rare earth (Re), stearic acid (SA) and ethylene-vinyl acetate copolymer (EVA) composition；Institute
State binder each component mass percentage be respectively PW 30%~50%, LPW 10%~20%, PP 35%~40%,
Re 1%~5%, SA 2%~10%, EVA 1%~5%.
As further clarifying, above-mentioned rare earth is by CeH2、LaH2、NdH2、YH2、CeB6、LaB6、NdB2、YB6In it is any one
Kind or several compositions.
As advanced optimizing, above-mentioned rare earth is by CeH2、LaH2、NdH2、YH2In any one or a few, with CeB6、
LaB6、NdB2、YB6In any one or a few mixing composition, and the total amount of adding of rare-earth boride be less than or equal to binder it is total
The 0.15% of quality.By further limiting the total amount of adding of rare-earth boride in rare earth composition, injection moulding titanium ensure that
While with excellent microstructure and mechanical property, in turn avoid leading to the reduction of its consistency.
As advanced optimizing, the average particle size of above-mentioned titanium hydride powders is 9~11 μm.
As further clarifying, the mass content of the vinyl acetate in above-mentioned ethylene-vinyl acetate copolymer (EVA) is
20%.
What another object of the present invention was achieved through the following technical solutions:
The preparation method of above-mentioned titanium hydride powders injection moulding feeding product, which comprises the following steps:
Each component, the titanium hydride powders for weighing binder respectively are mixed uniformly later, are put into preheated mixer
In at 175 DEG C~190 DEG C, be kneaded 2h~4h, after the feeding of the molten condition being kneaded is taken out, it is cooling after in crusher
It is broken, then pelletized by granulator, it is finally putting into vacuum oven and saves or vacuumize packaging preservation, obtain titanium hydride powders
Injection moulding feeding product.
The invention has the following advantages:
It is selected in the feeding product form the present invention provides a kind of titanium hydride powders injection moulding feeding product
Binder each component compatibility is good, and gained feeding product rheology can be good, in injection process the defects of bubble-free, overlap；It is made
The degreasing in normal heptane of standby blank, degreasing 4~5 hours at 40~60 DEG C can remove 99% or more soluble bonding
Agent-PW, LPW, SA, and degreased blank defect is few, conformality is good, the performances such as degreased blank density and intensity are higher, and then improve note
The sintered density of forming titanium is penetrated, the hole average-size of sintered blank is respectively less than 10 μm, and porosity is only 0.2%~0.6%, is kept away
Exempt from crystal grain to grow up, (relative density (%) of finished product is 99.46~99.53 to the tissue and mechanical property for improving titanium, hardness
It (HV) is 398~400, yield strength (MPa) is 498~502, and tensile strength (MPa) is 649~667, and elongation percentage (%) is 28
~30), so that the sintered blank after vacuum-sintering is indeformable, surface is smooth, without bubbling, dimensional accuracy with higher and surface essence
Degree.In addition, above-mentioned preparation method provided by the invention, has apparatus and process and operation is simple, it is many to be easy to industrialization etc.
A little.
Detailed description of the invention
Fig. 1 is that gained feeding product is applied in the embodiment of the present invention 1, and resulting degreased blank is disconnected after injection moulding, degreasing
The SEM spectrum of mouth.
Fig. 2 is to prepare resulting finished product i.e. metal titanium products fracture using gained feeding product in the embodiment of the present invention 1
The SEM spectrum at place.
Specific embodiment
The present invention is specifically described below by specific embodiment, it is pointed out here that following embodiment is served only for this hair
It is bright to be further described, it should not be understood as limiting the scope of the invention, the person skilled in the art of this field can root
Some nonessential modifications and adaptations are made to the present invention according to foregoing invention content.
Embodiment 1
A kind of titanium hydride powders injection moulding feeding product, raw material are 9~11 μm by binder and average particle size
Titanium hydride powders composition, wherein binder accounts for the 14% of feeding product gross mass；Binder is by solid paraffin (PW), liquid stone
Wax (LPW), polypropylene (PP), rare earth (Re), stearic acid (SA) and ethylene-vinyl acetate copolymer (EVA) composition, these are former
Material all uses conventional commercial product, wherein solid paraffin is the paraffin wax of Shanghai Hua Ling rehabilitation mechanical factory production, it is by high-purity
Degree paraffin and microwax are made；Atoleine is the production of Chengdu Ke Long chemical reagent factory, and polypropylene is China Petroleum
The quality product grade of work Co., Ltd production, rare earth are the production of Guangzhou Weng Jiang reagent Co., Ltd, and stearic acid is Chengdu section Long Huagong
Chemical reagent work's production, content is greater than 99.0%, EVA and originates from Dupont, and the mass content of vinyl acetate is 20%；Binder
The mass percentage of middle each component is respectively PW 35%, LPW 15%, PP38%, Re 4%, SA 6%, EVA 2%；It is dilute
Soil is by CeH2、LaH2、NdH2And YH2It is formed according to the ratio that mass ratio is 1:1:1:1.
The preparation method of the feeding product of titanium hydride powders injection moulding described in this example, comprising the following steps:
Each component, the titanium hydride powders for weighing binder respectively are mixed uniformly later, are put into preheated mixer
In at 185 DEG C, be kneaded 3h, after the feeding of the molten condition being kneaded is taken out, be crushed in crusher after cooling, then pass through
Granulator granulation finally vacuumizes packaging and saves, obtains titanium hydride powders injection moulding feeding product.
In addition, first feeding product is added during gained feeding product injection moulding prepares titanium products in application this example
Enter in injection machine, be 160~190 DEG C in injection temperature, injection pressure is 60~127MPa, and mould temperature is 112~125 DEG C of items
Injection moulding under part, prepares blank；Blank is placed in degreasing in normal heptane again, skimming temp is 40~60 DEG C, degreasing time
For 4~5h, degreased blank is obtained；Degreased blank is placed in low-pressure sintering furnace afterwards and is sintered, 1200~1350 DEG C of sintering temperature, is protected
120~240min of temperature to get arrive metal titanium products.
1 and 2 it is found that form a large amount of holes with reference to the accompanying drawings between degreased blank particle, and porosity is 20~30vol%,
This had both made the surface aperture of follow-up sintering process smooth opening and internal connected pore channel, shortened the follow-up sintering time, and guarantee
Degreased blank has suitable intensity, improves finished product inside solid, so that the hole average-size of sintered blank is respectively less than 10 μ
M, porosity is only 0.2%~0.6%, and even particle size.
Titanium products obtained in this example are detected, relative density (%) is 99.46, and hardness (HV) is 398, and surrender is strong
Spending (MPa) is 502, and tensile strength (MPa) is 650, and elongation percentage (%) is 28.
Embodiment 2
A kind of titanium hydride powders injection moulding feeding product, raw material are 9~11 μm by binder and average particle size
Titanium hydride powders composition, and binder accounts for the 11% of feeding product gross mass；Binder is by PW, LPW, PP, Re, SA and EVA group
At these raw materials all use conventional commercial product, wherein EVA originates from Dupont, and the mass content of vinyl acetate is
20%；The mass percentage of each component is respectively PW 40%, LPW 17%, PP 36%, Re 4%, SA in binder
2%, EVA 1%；Rare earth is by CeH2、LaH2And CeB6Respectively according to 3%, 0.85% and 0.15% ratio for accounting for binder gross mass
Example composition.
The preparation method of the feeding product of titanium hydride powders injection moulding described in this example, comprising the following steps:
Each component, the titanium hydride powders for weighing binder respectively are mixed uniformly later, are put into preheated mixer
In at 180 DEG C, be kneaded 3.5h, after the feeding of the molten condition being kneaded is taken out, be crushed in crusher after cooling, then lead to
Granulator granulation is crossed, packaging is finally vacuumized and saves, obtain titanium hydride powders injection moulding feeding product.
In addition, first feeding product is added during gained feeding product injection moulding prepares titanium products in application this example
Enter in injection machine, be 160~190 DEG C in injection temperature, injection pressure is 60~127MPa, and mould temperature is 112~125 DEG C of items
Injection moulding under part, prepares blank；Blank is placed in degreasing in normal heptane again, skimming temp is 40~60 DEG C, degreasing time
For 4~5h, degreased blank is obtained；Degreased blank is placed in low-pressure sintering furnace afterwards and is sintered, 1200~1350 DEG C of sintering temperature, is protected
120~240min of temperature to get arrive metal titanium products.
Titanium products obtained in this example are detected, relative density (%) is 99.51, and hardness (HV) is 400, and surrender is strong
Spending (MPa) is 498, and tensile strength (MPa) is 649, and elongation percentage (%) is 30.
Embodiment 3
A kind of titanium hydride powders injection moulding feeding product, raw material are 9~11 μm by binder and average particle size
Titanium hydride powders composition, and binder accounts for the 13% of feeding product gross mass；Binder is by PW, LPW, PP, Re, SA and EVA group
At these raw materials all use conventional commercial product, wherein EVA originates from Dupont, and the mass content of vinyl acetate is
20%；The mass percentage of each component is respectively PW 33%, LPW 12%, PP 35%, Re 5%, SA in binder
10%, EVA 5%；Rare earth is by CeH2、NdH2、YH2And LaB6、NdB2Respectively according to account for binder gross mass 1.3%, 2%,
1.55% and 0.05%, 0.10% ratio composition.
The preparation method of the feeding product of titanium hydride powders injection moulding described in this example, comprising the following steps:
Each component, the titanium hydride powders for weighing binder respectively are mixed uniformly later, are put into preheated mixer
In at 190 DEG C, be kneaded 4h, after the feeding of the molten condition being kneaded is taken out, be crushed in crusher after cooling, then pass through
Granulator granulation is finally putting into vacuum oven preservation, obtains titanium hydride powders injection moulding feeding product.
In addition, first feeding product is added during gained feeding product injection moulding prepares titanium products in application this example
Enter in injection machine, be 180~190 DEG C in injection temperature, injection pressure is 100~127MPa, and mould temperature is 120~125 DEG C
Under the conditions of injection moulding, prepare blank；Blank is placed in degreasing in normal heptane again, skimming temp is 55~60 DEG C, when degreasing
Between be 4.5~5h, obtain degreased blank；Degreased blank is placed in low-pressure sintering furnace afterwards and is sintered, sintering temperature 1300~1350
DEG C, 220~240min is kept the temperature to get metal titanium products are arrived.
Titanium products obtained in this example are detected, relative density (%) is 99.53, and hardness (HV) is 400, and surrender is strong
Spending (MPa) is 500, and tensile strength (MPa) is 667, and elongation percentage (%) is 30.
Claims (1)
1. a kind of method that titanium hydride powders injection moulding prepares titanium products with feeding product, it is characterised in that: its raw material is by gluing
It ties agent and average particle size to form for 9~11 μm of titanium hydride powders, wherein binder accounts for the 14% of the feeding product gross mass；
The binder is made of solid paraffin, atoleine, polypropylene, rare earth, stearic acid and ethylene-vinyl acetate copolymer,
The mass content of vinyl acetate is 20% in ethylene-vinyl acetate copolymer；The mass percentage of the binder each component
Respectively solid paraffin 35%, atoleine 15%, polypropylene 38%, rare earth 4%, stearic acid 6% and ethylene-vinyl acetate copolymerization
Object 2%；The rare earth is by CeH2、LaH2、NdH2And YH2It is formed according to the ratio that mass ratio is 1:1:1:1；
The preparation method of the titanium hydride powders injection moulding feeding product, comprising the following steps: weigh binder respectively
Each component, titanium hydride powders, be mixed later uniformly, be put into preheated mixer at 185 DEG C, be kneaded 3h, after will
The feeding for the molten condition being kneaded takes out, and is crushed in crusher, then pelletized after cooling by granulator, finally vacuumizes packet
Dress saves；
Gained feeding product injection moulding prepares titanium products: first feeding product being added in injection machine, is in injection temperature
160~190 DEG C, injection pressure is 60~127MPa, and mould temperature is injection moulding under the conditions of 112~125 DEG C, prepares blank；Again
Blank is placed in degreasing in normal heptane, skimming temp is 40~60 DEG C, and degreasing time is 4~5h, obtains degreased blank；Afterwards by degreasing
Base is placed in low-pressure sintering furnace and is sintered, and 1200~1350 DEG C of sintering temperature, keeps the temperature 120~240min to get Titanium is arrived
Product.
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| CN102151832A (en) * | 2011-02-28 | 2011-08-17 | 中南大学 | Extrusion forming agent and preparation and use thereof |
| CN104559840A (en) * | 2014-11-27 | 2015-04-29 | 东莞劲胜精密组件股份有限公司 | Adhesive for powder injection forming and application method thereof |
| CN104690271A (en) * | 2015-02-12 | 2015-06-10 | 余鹏 | Powder injection molding process by utilizing low-cost hydrogenated-dehydrogenated titanium powder |
| CN104722750A (en) * | 2013-12-19 | 2015-06-24 | 苏燕敏 | Powder extrusion forming agent |
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| JP2010095789A (en) * | 2007-12-26 | 2010-04-30 | Dowa Electronics Materials Co Ltd | Metal particle dispersion liquid, coating film, metal film, conductive paste, and method for producing metal film |
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|---|---|---|---|---|
| CN102151832A (en) * | 2011-02-28 | 2011-08-17 | 中南大学 | Extrusion forming agent and preparation and use thereof |
| CN104722750A (en) * | 2013-12-19 | 2015-06-24 | 苏燕敏 | Powder extrusion forming agent |
| CN104559840A (en) * | 2014-11-27 | 2015-04-29 | 东莞劲胜精密组件股份有限公司 | Adhesive for powder injection forming and application method thereof |
| CN104690271A (en) * | 2015-02-12 | 2015-06-10 | 余鹏 | Powder injection molding process by utilizing low-cost hydrogenated-dehydrogenated titanium powder |
Non-Patent Citations (1)
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