CN107214332A - 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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- CN107214332A CN107214332A CN201710426580.4A CN201710426580A CN107214332A CN 107214332 A CN107214332 A CN 107214332A CN 201710426580 A CN201710426580 A CN 201710426580A CN 107214332 A CN107214332 A CN 107214332A
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- Prior art keywords
- injection moulding
- binding agent
- 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
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Powder Metallurgy (AREA)
Abstract
The present invention relates to a kind of titanium hydride powders injection moulding feeding product.Its raw material is made up of binding agent and titanium hydride powders, it is characterised in that：The binding agent accounts for the 10%~15% of the feeding product gross mass；The binding agent is made up of solid paraffin, atoleine, polypropylene, rare earth, stearic acid and ethylene vinyl acetate copolymer；The weight/mass percentage composition of the binding agent 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 degreasing base defect is few, conformality is good, porosity is suitable, and can guarantee that finished product has excellent tissue and mechanical property.
Description
Technical field
Produced the present invention relates to Metal Injection Molding field, more particularly to a kind of titanium hydride powders injection moulding with feeding
Product and preparation method thereof.
Background technology
Titanium powder injection moulding (Ti-MIM) technology, can manufacture the titanium parts of near-net-shape, complicated shape, can overcome titanium
The problem of product machining difficulty and big allowance, therefore be widely used.Use cheap titantium hydride (TiH2) powder
The last material powder as injection moulding, and it is reduction production cost to develop the binder system of new and effective injection moulding
With the effective way enhanced product performance.
At present, conventional titanium hydride powders injection moulding feeding product, exists significantly not during injection moulding
Foot：1st, binding agent poor compatibility selected in feeding product form, gained feeding processing fluidity in injection moulding is poor, note
There are the defects such as bubble, overlap during penetrating.2nd, prepared blank solvent debinding rate is low, and degreasing time length, temperature are high, generally
For at 60 DEG C~80 DEG C, 10~24h of degreasing, and degreasing base defect is more, conformality is poor.Although the 3, blank fragment is with higher
Degreasing rate, but also just because of its degreasing rate is high, in use there is the defect that hole is big, porosity is high in gained degreasing base, and then
Cause the performances such as degreasing base density and intensity relatively low, cause finished product performance not high.4th, crystal grain is easy during injection moulding
Grow up, there is deformation more the sintered blank after vacuum-sintering, and it is rough, there is bubbling, dimensional accuracy and surface accuracy be not high, cause
Many performances such as the density of obtained finished product are made to need further raising, for example, using conventional feeding product through injection moulding
Obtained titanium products afterwards, its relative density (%) is 97.95~98.96, and hardness (HV) is 380~388, yield strength
(MPa) it is 254~264, tensile strength (MPa) is 325~346, elongation percentage (%) is 18~20.
The content 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 degreasing base defect is few, conformality is good, porosity is suitable, and can guarantee that end
Product has excellent tissue and mechanical property.
, should another object of the present invention is to provide the preparation method of above-mentioned titanium hydride powders injection moulding feeding product
Preparation method has apparatus and process and operation is simple, it is easy to which industrialization etc. is many a little.
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, its raw material is made up of binding agent and titanium hydride powders, and it is special
Levy and be：The binding agent accounts for the 10%~15% of the feeding product gross mass；The binding agent 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
The weight/mass percentage composition for stating binding agent each component be respectively PW 30%~50%, LPW 10%~20%, PP 35%~40%,
Re 1%~5%, SA 2%~10%, EVA 1%~5%.
As further clearly, above-mentioned rare earth is by CeH2、LaH2、NdH2、YH2、CeB6、LaB6、NdB2、YB6In it is any one
Plant or several compositions.
As further optimization, 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 rare-earth boride total amount of adding be less than or equal to binding agent it is total
The 0.15% of quality.The total amount of adding of middle rare earth boride is constituted by further limiting rare earth, injection moulding titanium is being ensure that
While with excellent microstructure and mechanical property, turn avoid causes the reduction of its consistency.
As further optimization, the particle mean size of above-mentioned titanium hydride powders is 9~11 μm.
As further clearly, 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, it is characterised in that comprise the following steps：
Each component, the titanium hydride powders of binding agent are weighed respectively, are mixed afterwards uniformly, are put into preheated banbury
In at 175 DEG C~190 DEG C, knead 2h~4h, after the feeding of the molten condition kneaded is taken out, after cooling in disintegrating machine
It is broken, then pelletized by granulator, it is finally putting into vacuum drying chamber and preserves or vacuumize packaging preservation, that is, titanium hydride powders is made
Injection moulding feeding product.
The invention has the advantages that：
It is selected in the feeding product form the invention provides a kind of titanium hydride powders injection moulding feeding product
Binding agent each component compatibility is good, and gained feeding product rheology can good, the defect such as bubble-free, overlap in injection process；It is made
Standby blank degreasing in normal heptane, in degreasing 4~5 hours at 40~60 DEG C, you can the soluble bonding of removing more than 99%
Agent-PW, LPW, SA, and degreasing base defect is few, conformality is good, the performance such as degreasing base density and intensity is higher, and then improves note
The sintered density of shaping 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, improving the tissue of titanium, (relative density (%) of finished product is 99.46~99.53, hardness with mechanical property
(HV) it is 398~400, yield strength (MPa) is 498~502, tensile strength (MPa) is 649~667, elongation percentage (%) is 28
~30) so that the sintered blank after vacuum-sintering is indeformable, and surface is smooth, without bubbling, with higher dimensional accuracy and surface essence
Degree.In addition, the above-mentioned preparation method that provides of the present invention, with apparatus and process and operation is simple, it is easy to which industrialization etc. is many
A little.
Brief description of the drawings
Fig. 1 is applies gained feeding product in the embodiment of the present invention 1, the degreasing base of gained breaks after injection moulding, degreasing
The SEM spectrum of mouth.
Fig. 2 is metal titanium products fracture to apply the finished product obtained by the preparation of gained feeding product in the embodiment of the present invention 1
The SEM spectrum at place.
Embodiment
The present invention is specifically described below by specific embodiment, it is pointed out here that following examples are served only for this hair
It is bright to be further described, it is impossible to be interpreted as limiting the scope of the invention, the person skilled in the art of this area 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, its raw material is 9~11 μm by binding agent and particle mean size
Titanium hydride powders are constituted, wherein, binding agent accounts for the 14% of feeding product gross mass；Binding agent 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 that Shanghai Hua Ling rehabilitation mechanicals factory produces, and it is by high-purity
Degree paraffin and microwax are made；Atoleine is the production of Chengdu Ke Long chemical reagents factory, and polypropylene is CNPC
The quality product level of work Co., Ltd production, rare earth is the production of Guangzhou Weng Jiang reagents Co., Ltd, and stearic acid is the imperial chemical industry of Chengdu section
Chemical reagent work's production, content originates from Dupont more than 99.0%, EVA, and the mass content of vinyl acetate is 20%；Binding agent
The weight/mass percentage composition 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 1 according to mass ratio:1:1:1 ratio composition.
The preparation method of feeding product of titanium hydride powders injection moulding described in this example, comprises the following steps：
Each component, the titanium hydride powders of binding agent are weighed respectively, are mixed afterwards uniformly, are put into preheated banbury
In at 185 DEG C, knead 3h, after the feeding of the molten condition kneaded is taken out, crushed after cooling in disintegrating machine, then pass through
Granulator is pelletized, and is finally vacuumized packaging and is preserved, that is, titanium hydride powders injection moulding feeding product is made.
In addition, during gained feeding product injection moulding in applying this example prepares titanium products, first feeding product is added
Enter in injection machine, be 160~190 DEG C in injection temperature, injection pressure is 60~127MPa, mould temperature is 112~125 DEG C of bars
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, degreasing base is obtained；Degreasing base is placed in low-pressure sintering furnace afterwards and is sintered, 1200~1350 DEG C of sintering temperature is protected
120~240min of temperature, that is, obtain Titanium product.
1 and 2 are understood with reference to the accompanying drawings, and a large amount of holes are formd between degreasing base particle, and its porosity is 20~30vol%,
This had both caused the surface perforate of follow-up sintering process smooth opening and internal connected pore channel, shortened the follow-up sintering time, ensured again
Degreasing base has suitable intensity, improves finished product interior 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 after testing, its relative density (%) is 99.46, and hardness (HV) is 398, and surrender is strong
It is 502 to spend (MPa), and tensile strength (MPa) is 650, and elongation percentage (%) is 28.
Embodiment 2
A kind of titanium hydride powders injection moulding feeding product, its raw material is 9~11 μm by binding agent and particle mean size
Titanium hydride powders are constituted, and binding agent accounts for the 11% of feeding product gross mass；Binding agent is by PW, LPW, PP, Re, SA and EVA group
Into, these raw materials all use conventional commercial product, wherein, EVA originates from Dupont, and the mass content of vinyl acetate is
20%；The weight/mass percentage composition of each component is respectively PW 40%, LPW 17%, PP 36%, Re 4%, SA in binding agent
2%th, EVA 1%；Rare earth is by CeH2、LaH2And CeB6Respectively according to 3%, 0.85% and 0.15% ratio for accounting for binding agent gross mass
Example composition.
The preparation method of feeding product of titanium hydride powders injection moulding described in this example, comprises the following steps：
Each component, the titanium hydride powders of binding agent are weighed respectively, are mixed afterwards uniformly, are put into preheated banbury
In at 180 DEG C, knead 3.5h, after the feeding of the molten condition kneaded is taken out, crushed after cooling in disintegrating machine, then lead to
Granulator granulation is crossed, packaging is finally vacuumized and preserves, that is, titanium hydride powders injection moulding feeding product is made.
In addition, during gained feeding product injection moulding in applying this example prepares titanium products, first feeding product is added
Enter in injection machine, be 160~190 DEG C in injection temperature, injection pressure is 60~127MPa, mould temperature is 112~125 DEG C of bars
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, degreasing base is obtained；Degreasing base is placed in low-pressure sintering furnace afterwards and is sintered, 1200~1350 DEG C of sintering temperature is protected
120~240min of temperature, that is, obtain Titanium product.
Titanium products obtained in this example after testing, its relative density (%) is 99.51, and hardness (HV) is 400, and surrender is strong
It is 498 to spend (MPa), and tensile strength (MPa) is 649, and elongation percentage (%) is 30.
Embodiment 3
A kind of titanium hydride powders injection moulding feeding product, its raw material is 9~11 μm by binding agent and particle mean size
Titanium hydride powders are constituted, and binding agent accounts for the 13% of feeding product gross mass；Binding agent is by PW, LPW, PP, Re, SA and EVA group
Into, these raw materials all use conventional commercial product, wherein, EVA originates from Dupont, and the mass content of vinyl acetate is
20%；The weight/mass percentage composition of each component is respectively PW 33%, LPW 12%, PP 35%, Re 5%, SA in binding agent
10%th, EVA 5%；Rare earth is by CeH2、NdH2、YH2And LaB6、NdB2Respectively according to account for binding agent gross mass 1.3%, 2%,
1.55% and 0.05%, 0.10% ratio is constituted.
The preparation method of feeding product of titanium hydride powders injection moulding described in this example, comprises the following steps：
Each component, the titanium hydride powders of binding agent are weighed respectively, are mixed afterwards uniformly, are put into preheated banbury
In at 190 DEG C, knead 4h, after the feeding of the molten condition kneaded is taken out, crushed after cooling in disintegrating machine, then pass through
Granulator is pelletized, and is finally putting into vacuum drying chamber preservation, that is, titanium hydride powders injection moulding feeding product is made.
In addition, during gained feeding product injection moulding in applying this example prepares titanium products, first feeding product is added
Enter in injection machine, be 180~190 DEG C in injection temperature, injection pressure is 100~127MPa, 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, during degreasing
Between be 4.5~5h, obtain degreasing base；Degreasing base is placed in low-pressure sintering furnace afterwards and is sintered, sintering temperature 1300~1350
DEG C, 220~240min is incubated, that is, obtains Titanium product.
Titanium products obtained in this example after testing, its relative density (%) is 99.53, and hardness (HV) is 400, and surrender is strong
It is 500 to spend (MPa), and tensile strength (MPa) is 667, and elongation percentage (%) is 30.
Claims (6)
1. a kind of titanium hydride powders injection moulding feeding product, its raw material is made up of binding agent and titanium hydride powders, its feature
It is：The binding agent accounts for the 10%~15% of the feeding product gross mass；The binding agent is by solid paraffin, liquid stone
Wax, polypropylene, rare earth, stearic acid and ethylene-vinyl acetate copolymer composition；The quality percentage of the binding agent each component contains
Amount be 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%.
2. titanium hydride powders injection moulding feeding product as claimed in claim 1, it is characterised in that：The rare earth is by CeH2、
LaH2、NdH2、YH2、CeB6、LaB6、NdB2、YB6In any one or a few composition.
3. titanium hydride powders injection moulding feeding product as claimed in claim 1 or 2, it is characterised in that：The rare earth 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 is less than or equal to the 0.15% of binding agent gross mass.
4. the titanium hydride powders injection moulding feeding product as described in claim 1-3 is any, it is characterised in that：The titantium hydride
The particle mean size of powder is 9~11 μm.
5. the titanium hydride powders injection moulding feeding product as described in claim 1-4 is any, it is characterised in that：The ethene-
The mass content of vinyl acetate in vinyl acetate co-polymer is 20%.
6. the preparation method of titanium hydride powders injection moulding feeding product as described in claim 1-5 is any, it is characterised in that
Comprise the following steps：
Each component, the titanium hydride powders of binding agent are weighed respectively, are mixed uniformly, are put into preheated banbury afterwards
At 175 DEG C~190 DEG C, knead 2h~4h, after the feeding of the molten condition kneaded is taken out, broken after cooling in disintegrating machine
It is broken, then pelletized by granulator, it is finally putting into vacuum drying chamber and preserves or vacuumize packaging preservation.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113333752A (en) * | 2020-03-03 | 2021-09-03 | 湖南省民鑫新材料股份有限公司 | Titanium and titanium alloy injection molding feed product and preparation method thereof |
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