CN109852840A - A kind of copper-titanium alloy and preparation method thereof - Google Patents
A kind of copper-titanium alloy and preparation method thereof Download PDFInfo
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Abstract
A kind of copper-titanium alloy of the invention and preparation method thereof, alloy include component and its mass percent are as follows: Cu powder: 64~66%, TiH2Powder: 34~36%.Preparation method are as follows: by the composition proportion of copper-titanium alloy, by Cu powder and TiH2Powder is uniformly mixed, it after mixture is made, is pressed, briquetting pressure is 35~100MPa, dwell time is 10~30min, alloy green compact are made, are sintered under inert gas atmosphere, with the heating rate of 5~10 DEG C/min, from room temperature to 1085~1150 DEG C of sintering temperature, after 10~60min of sintering time, cooling is come out of the stove, and copper-titanium alloy is made.The copper-titanium alloy of this method preparation has high hardness and toughness, while also having good brittleness and thermal conductivity.And raw material is easy to get, mixing time is short.By the accurate control to sintering temperature, heating rate and soaking time, making the alloy prepared, not only ingredient meets the requirements but also performance is guaranteed.
Description
Technical field
The invention belongs to metallurgical technology fields, and in particular to a kind of copper-titanium alloy and preparation method thereof.
Background technique
Since nineteen thirties, people begin one's study copper-titanium alloy, it was found that chemical combination between a variety of copper titaniums
Object, although comparison that copper-titanium alloy begins one's study is early, but never obtains the enough attention of people.Copper titanium is closed at present
The research of gold has focused largely on the region rich in copper, which is dissolved in copper for only partial-titanium, and with the change of temperature
The changes in solubility for changing titanium is larger, it is easy to Lai Jinhang ageing strengthening.The study found that age-hardening copper-titanium alloy (1~
Mechanics and physical property 6wt.%Ti) can compare favourably with copper beryllium alloy.Although and copper beryllium alloy has excellent physical property
And mechanical property, but beryllium has certain toxicity, can jeopardize human health in use, therefore study copper-titanium alloy
Substitute as toxic copper beryllium alloy becomes very significant.
The micro-hardness testing of the conversion zone diffuseed to form simultaneously to copper and titanium shows that the hardness of intermetallic compound is far high
In the hardness of fine copper or pure titanium metal matrix, therefore intermetallic compound can be used as the reinforced phase of certain materials.Such as copper-based
In boron nitride grinding wheel, addition titanium elements, which are reacted as active element with boron nitride participation, generates titanium nitride and titanium boride, it is established that
Being connected chemically between metallic matrix and boron nitride abrasive materials, enhances matrix for the holding power of boron nitride, can effectively prevent
Only falling off for boron nitride abrasive materials and cause grinding wheel to fail.Copper and titanium, which also react, simultaneously generates intermetallic compound, as reinforced phase
The intensity that Copper substrate can be significantly improved improves the service life of grinding wheel.Since electric conductivity well can be used as cable, transformer
Coil or conductive sheet, high-strength spring, electric contact, the lead frame in integrated antenna package and diaphragm etc. use.And phase
Pass data shows copper and titanium both excellent materials of resistance to marine corrosion, and titanium ingot is placed in seabed decades and further takes out
It is still bright, therefore we are it is believed that copper titanium intermetallic compound also has the performance of excellent resistance to marine corrosion, it may
It can be as the corrosion-resistant finishes or structural material under the operating condition of ocean.However, almost without specific to intermediate region
Copper-titanium alloy studied, this field research almost also in blank.
Summary of the invention
To solve the above-mentioned problems, the present invention provides a kind of copper-titanium alloy and preparation method thereof, which is a kind of hard
Very high alloy is spent, while there is outstanding toughness and good brittleness, specific technical solution is as follows:
A kind of copper-titanium alloy includes component and its mass percent are as follows: Cu powder: 64~66%, TiH2Powder: 34~36%.
A kind of microhardness of copper-titanium alloy is 450~500HV, and impact flexibility is 28~45J/cm2, it is broken tough
Property be 5~11MPam1/2。
The preparation method of the copper-titanium alloy, includes the following steps:
Step 1, material mixes: by the composition proportion of copper-titanium alloy, by Cu powder and TiH2Powder is uniformly mixed, and mixing is made
Material；
Step 2, molding and demoulding:
Mixture is pressed, alloy green compact are made, wherein the briquetting pressure is 35~100MPa, is protected
The pressure time is 10~30min；
Step 3, it is sintered:
(1) alloy green compact are sintered, with the heating rate of 5~10 DEG C/min, from room temperature to sintering temperature
1085~1150 DEG C, 10~60min of sintering time, in which: the sintering operation carries out under inert gas atmosphere；
(2)≤40 DEG C are cooled to after being sintered to come out of the stove, copper-titanium alloy is made.
In the step 1, Cu powder and TiH2The particle size range of powder is 45~60 μm.
In the step 1, material incorporation time is 0.5~2h.
In the step 2, compression moulding carries out at room temperature, process are as follows: uniformly puts into mixture in mold, in phase
It answers and is pressed under parameter.
In the step 2, it is pressed using hydraulic press.
In the step 2, demoulded using steel die.
In the step 3 (1), inert gas atmosphere purpose is to completely cut off air, makes sintering process under anaerobic
It carries out, the inert gas is argon gas.
In the step 3 (2), the copper-titanium alloy of preparation includes Cu3Ti2And Cu4Ti3Phase, ingredient even tissue, Cu3Ti2
And Cu4Ti3Tissue mutually package, and it is distributed relatively uniform, hardness test, which shows not only to have, high hardness while to be had both out
The toughness of color and good fracture property.
In the preparation process of copper-titanium alloy of the invention, TiH2It decomposes first and active metal Ti is provided, then Ti and Cu are anti-
Raw reaction, centre are occurred by a series of phase transformation, ultimately generate subject alloy phase, specific ultimate reactive form is as follows:
TiH2=Ti+H2And 7Cu+5Ti=Cu3Ti2+Cu4Ti3
A kind of copper-titanium alloy of the invention has the beneficial effect that compared with existing copper-titanium alloy
(1) copper-titanium alloy of the invention has high hardness, keeps also having while high rigidity and outstanding toughness good
Good brittleness and good thermal conductivity.
(2) preparation method provided by the invention, raw material sources are easy and at low cost, and mixing time is short.By to sintering temperature
The accurate control of degree, heating rate and soaking time, making the alloy prepared, not only ingredient meets the requirements but also performance has guarantor
Card.
Detailed description of the invention
Fig. 1 is Cu in the copper-titanium alloy of the preparation of embodiment 34Ti3Alloy phase metallography microscope shape appearance figure；
Fig. 2 is Cu in the copper-titanium alloy of the preparation of embodiment 34Ti3Alloy mutually carries out the metallography microscope shape after micro-hardness experiments
Looks figure；
Fig. 3 is Cu in the copper-titanium alloy of the preparation of embodiment 33Ti2Alloy phase metallography microscope shape appearance figure；
Fig. 4 is Cu in the copper-titanium alloy of the preparation of embodiment 33Ti2Alloy mutually carries out the metallography microscope shape after micro-hardness experiments
Looks figure.
Specific embodiment
Below with reference to specific implementation case, the invention will be further described, but the invention is not limited to these to implement
Example.
Embodiment 1
A kind of copper-titanium alloy, including component and its mass percent are as follows: Cu powder: 64%, TiH2Powder: 36%；Cu powder and TiH2
The sum of powder mass percent is 100%.
The preparation method of above-mentioned copper-titanium alloy, includes the following steps:
Step 1, mixing: being 45 μm of Cu powder and TiH by particle size range by the composition proportion of copper-titanium alloy2Powder mixing
Uniformly, mixture A is made in incorporation time 1h；
Step 2, it forms: mixture A uniformly being put into mold, cold moudling, pressure 100MPa, pressure maintaining 10min, made
Obtain alloy green compact；
Step 3, it demoulds: pressed alloy green compact is demoulded；
Step 4, it is sintered:
(1) by alloy green compact, be sintered under inert gas atmosphere, with the heating rate of 10 DEG C/min, from room temperature to
1085 DEG C of sintering temperature, sintering time 60min；
(2)≤40 DEG C are cooled to after being sintered to come out of the stove, copper-titanium alloy is made, which includes Cu3Ti2And Cu4Ti3Phase,
Ingredient even tissue, Cu3Ti2And Cu4Ti3Tissue mutually package, and it is distributed relatively uniform, after tested, microhardness is
450HV, impact flexibility 45J/cm2, fracture toughness 5MPam1/2。
Embodiment 2
A kind of copper-titanium alloy, including component and its mass percent are as follows: Cu powder: 65%, TiH2Powder: 35%.
The preparation method of above-mentioned copper-titanium alloy, includes the following steps:
Step 1, mixing:
By the composition proportion of copper-titanium alloy, by Cu powder and TiH2Powder is uniformly mixed, incorporation time 1h, and mixture A is made,
The Cu powder and TiH2The particle size range of powder is 60 μm；
Step 2, it forms:
Mixture A is uniformly put into mold, cold moudling, pressure 35MPa, pressure maintaining 30min, alloy green compact are made；
Step 3, it demoulds:
Pressed alloy green compact are demoulded；
Step 4, it is sintered:
(1) it by alloy green compact, is sintered under inert gas atmosphere, with the heating rate of 5 DEG C/min, from room temperature to burning
1150 DEG C of junction temperature, sintering time 10min；
(2)≤40 DEG C are cooled to after being sintered to come out of the stove, copper-titanium alloy, including Cu is made3Ti2And Cu4Ti3Phase, ingredient tissue are equal
It is even, Cu3Ti2And Cu4Ti3Tissue mutually package, and be distributed it is relatively uniform, after tested, microhardness 460HV, impact it is tough
Property is 40J/cm2, fracture toughness 6MPam1/2。
Embodiment 3
A kind of copper-titanium alloy, including component and its mass percent are as follows: Cu powder: 66%, TiH2Powder: 36%.
The preparation method of above-mentioned copper-titanium alloy, includes the following steps:
Step 1, mixing:
By the composition proportion of copper-titanium alloy, by Cu powder and TiH2Powder is uniformly mixed, incorporation time 1h, and mixture A is made,
The Cu powder and TiH2The particle size range of powder is 50 μm；
Step 2, it forms:
Mixture A is uniformly put into mold, cold moudling, pressure 75MPa, pressure maintaining 20min, alloy green compact are made；
Step 3, it demoulds:
Pressed alloy green compact are demoulded；
Step 4, it is sintered:
(1) by alloy green compact, be sintered under inert gas atmosphere, with the heating rate of 10 DEG C/min, from room temperature to
1100 DEG C of sintering temperature, sintering time 40min；
(2)≤40 DEG C are cooled to after being sintered to come out of the stove, copper-titanium alloy is made, which includes Cu3Ti2And Cu4Ti3Phase,
Cu3Ti2And Cu4Ti3Tissue mutually package, and it is distributed relatively uniform, Cu in alloy4Ti3Alloy phase metallography microscope shape appearance figure such as Fig. 1
It is shown, Cu3Ti2After alloy phase metallography microscope shape appearance figure is as shown in figure 3, carry out hardness test to the copper-titanium alloy, Cu4Ti3Alloy
Metallography microscope shape appearance figure after mutually carrying out micro-hardness experiments is as shown in Fig. 2, Cu3Ti2After alloy mutually carries out micro-hardness experiments
Metallography microscope shape appearance figure is as shown in figure 4, after tested, microhardness 500HV, impact flexibility 28J/cm2, fracture toughness is
11MPa·m1/2。
Embodiment 4
A kind of copper-titanium alloy, including component and its mass percent are as follows: Cu powder: 64.5%, TiH2Powder: 35.5%.
The preparation method of above-mentioned copper-titanium alloy, includes the following steps:
Step 1, mixing:
It is 40 μm of Cu powder and TiH by particle size range by the composition proportion of copper-titanium alloy2Powder is uniformly mixed, when mixing
Between be 1h, be made mixture A；
Step 2, it forms:
Mixture A is uniformly put into mold, cold moudling, pressure 50MPa, pressure maintaining 25min, alloy green compact are made；
Step 3, it demoulds:
Pressed alloy green compact are demoulded；
Step 4, it is sintered:
(1) it by alloy green compact, is sintered under inert gas atmosphere, with the heating rate of 7 DEG C/min, from room temperature to burning
1125 DEG C of junction temperature, sintering time 25min；
(2)≤40 DEG C are cooled to after being sintered to come out of the stove, copper-titanium alloy, including Cu is made3Ti2And Cu4Ti3Phase, ingredient tissue are equal
It is even, Cu3Ti2And Cu4Ti3Tissue mutually package, and be distributed it is relatively uniform, after tested, microhardness 470HV, impact it is tough
Property is 35J/cm2, fracture toughness 8MPam1/2。
Embodiment 5
A kind of copper-titanium alloy, including component and its mass percent are as follows: Cu powder: 65.5%, TiH2Powder: 34.5%.
The preparation method of above-mentioned copper-titanium alloy, includes the following steps:
Step 1, mixing:
By the composition proportion of copper-titanium alloy, by Cu powder and TiH2Powder is uniformly mixed, incorporation time 1h, and mixture A is made,
The Cu powder and TiH2The particle size range of powder is 50 μm；
Step 2, it forms:
Mixture A is uniformly put into mold, cold moudling, pressure 50MPa, pressure maintaining 20min, alloy green compact are made；
Step 3, it demoulds:
Pressed alloy green compact are demoulded；
Step 4, it is sintered:
(1) by alloy green compact, be sintered under inert gas atmosphere, with the heating rate of 10 DEG C/min, from room temperature to
1100 DEG C of sintering temperature, sintering time 30min；
(2)≤40 DEG C are cooled to after being sintered to come out of the stove, copper-titanium alloy, including Cu is made3Ti2And Cu4Ti3Phase, ingredient tissue are equal
It is even, Cu3Ti2And Cu4Ti3Tissue mutually package, and be distributed it is relatively uniform, after tested, microhardness 490HV, impact it is tough
Property is 30J/cm2, fracture toughness 10MPam1/2。
Claims (8)
1. a kind of copper-titanium alloy, which is characterized in that including component and its mass percent are as follows: Cu powder: 64~66%, TiH2Powder: 34
~36%.
2. copper-titanium alloy according to claim 1, which is characterized in that a kind of microhardness of copper-titanium alloy is
450~500HV, impact flexibility are 28~45J/cm2, fracture toughness is 5~11MPam1/2。
3. the preparation method of copper-titanium alloy described in claim 1, which comprises the steps of:
Step 1, material mixes: by the composition proportion of copper-titanium alloy, by Cu powder and TiH2Powder is uniformly mixed, and mixture is made；
Step 2, molding and demoulding:
Mixture is pressed, alloy green compact are made, wherein the briquetting pressure is 35~100MPa, when pressure maintaining
Between be 10~30min；
Step 3, it is sintered:
(1) alloy green compact are sintered, with the heating rate of 5~10 DEG C/min, from room temperature to sintering temperature 1085~
1150 DEG C, 10~60min of sintering time, in which: the sintering operation carries out under inert gas atmosphere；
(2)≤40 DEG C are cooled to after being sintered to come out of the stove, copper-titanium alloy is made.
4. the preparation method of copper-titanium alloy according to claim 3, which is characterized in that in the step 1, Cu powder and
TiH2The particle size range of powder is 45~60 μm.
5. the preparation method of copper-titanium alloy according to claim 3, which is characterized in that in the step 2, compression moulding
It carries out at room temperature, process are as follows: mixture is uniformly put into mold, is pressed under relevant parameter.
6. the preparation method of copper-titanium alloy according to claim 3, which is characterized in that in the step 3 (1), inertia
Gas atmosphere purpose is isolation air, carries out sintering process under anaerobic, and the inert gas is argon gas.
7. the preparation method of copper-titanium alloy according to claim 3, which is characterized in that in the step 3 (1), sintering
Following reaction successively occurs in the process:
TiH2=Ti+H2；
7Cu+5Ti=Cu3Ti2+Cu4Ti3。
8. the preparation method of copper-titanium alloy according to claim 3, which is characterized in that in the step 3 (2), preparation
Copper-titanium alloy include Cu3Ti2And Cu4Ti3Phase, ingredient even tissue, Cu3Ti2And Cu4Ti3Tissue mutually package.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011190508A (en) * | 2010-03-15 | 2011-09-29 | Tohoku Univ | Titanium copper for electronic component, and electronic component using the same |
| CN105483415A (en) * | 2015-12-24 | 2016-04-13 | 宁波正元铜合金有限公司 | Production process of copper alloy |
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2019
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011190508A (en) * | 2010-03-15 | 2011-09-29 | Tohoku Univ | Titanium copper for electronic component, and electronic component using the same |
| CN105483415A (en) * | 2015-12-24 | 2016-04-13 | 宁波正元铜合金有限公司 | Production process of copper alloy |
Non-Patent Citations (1)
| Title |
|---|
| YING CHENG ET AL.: "Gas Release Behavior of Cu-TiH2 Composite Powder and Its Application as a Blowing Agent to Fabricate Aluminum Foams with Low Porosity and Small Pore Size", 《METALLURGICAL AND MATERIALS TRANSACTIONS B》 * |
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