CN102465217A - Method of modifying thermal and electrical properties of multi-component titanium alloys - Google Patents
Method of modifying thermal and electrical properties of multi-component titanium alloys Download PDFInfo
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- CN102465217A CN102465217A CN2011102296938A CN201110229693A CN102465217A CN 102465217 A CN102465217 A CN 102465217A CN 2011102296938 A CN2011102296938 A CN 2011102296938A CN 201110229693 A CN201110229693 A CN 201110229693A CN 102465217 A CN102465217 A CN 102465217A
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- titanium alloy
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/16—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon
- C22F1/18—High-melting or refractory metals or alloys based thereon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C14/00—Alloys based on titanium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D21/00—Casting non-ferrous metals or metallic compounds so far as their metallurgical properties are of importance for the casting procedure; Selection of compositions therefor
- B22D21/06—Casting non-ferrous metals with a high melting point, e.g. metallic carbides
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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
- B22F3/10—Sintering only
- B22F3/1039—Sintering only by reaction
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/045—Alloys based on refractory metals
- C22C1/0458—Alloys based on titanium, zirconium or hafnium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
- C22C32/001—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with only oxides
- C22C32/0015—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with only oxides with only single oxides as main non-metallic constituents
- C22C32/0031—Matrix based on refractory metals, W, Mo, Nb, Hf, Ta, Zr, Ti, V or alloys thereof
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
- C22C32/0047—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents
- C22C32/0073—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents only borides
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Powder Metallurgy (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
Abstract
A method of increasing the thermal conductivity and decreasing the electrical resistivity of a titanium alloy. Boron is introduced into the titanium alloy to produce TiB precipitates. The TiB precipitates are then aligned in a direction of metal flow by hot metalworking.
Description
Technical field
The present invention relates to a kind of method of improving the titanium alloy physicals, especially process a kind of method that improves thermal conductivity, reduces resistivity of material to the titanium based component.
Background technology
Titanium alloy has good physicals and mechanical property simultaneously, for as various industrial circles such as aerospace and spaces Ultra-Light Material being provided.But use metal than other structures, for example steel and aluminium, the thermal conductivity of titanium alloy is lower.The low heat conductivity of titanium alloy can have influence on heating rate and the obtainable rate of cooling after processing and the thermal treatment.Than steel and aluminium, another shortcoming of titanium alloy is to have high resistivity.High resistivity has limited the use of titanium alloy as electroconductive.So to common titanium alloy,,, particularly do not reduce under the prerequisite of its unit elongation and fatigue property, need a kind of new improvement method and improve its thermal conductivity and reduce its resistivity not reducing its mechanical property as Ti-6Al-4V.Method of the present invention has just satisfied this demand.
Summary of the invention
According to the method for new improvement provided by the present invention, mix titanium boride (TiB) precipitate in the titanium alloy, and make alloy be controlled distortion to arrange titanium boride (TiB) precipitate helping reaching on the direction that heat conductivility and electrical property improve.The controlled deformation of said arrangement titanium boride (TiB) precipitate realizes through metal fever processing.
Boron is introduced into as titanium alloy component; Produce precipitate through any suitable method, said method as: processing (cast-and-wrought processing) or the PM technique as gas atomization (gas atomization) method and complex element (blended elemental) method are forged in casting (casting), casting.Picture forge (forging), roll extrusion (rolling) with push the hot worked working method of metal such as (extrusion) can be used to be implemented in along on the metal flow direction to the arrangement of titanium boride (TiB) precipitate.
As an example, method of the present invention can be used to improve its thermal conductivity and reduce its resistivity to the multi-component titanium alloy as Ti-6Al-4V (Ti-64) and Ti-6Al-2Sn-4Zr-2Mo (Ti-6242).
Description of drawings
Fig. 1 is a metallurgical technology schema of making the pre-alloyed powder of the titanium alloy article that contain titanium boride (TiB);
Fig. 2 a illustrates the atomizing pre-alloyed powder particulate section microstructure of Ti-6Al-4V-1B;
Fig. 2 b is that Ti-6Al-4V-1B passes through the microstructure after hot isostatic pressing forms powder consolidation;
Fig. 3 is the microstructure that forges the article different positions at Ti-6Al-4V-1B;
Fig. 4 a has shown the arrangement of titanium boride (TiB) precipitate (dark part) along extrusion axis for the microstructure of the extruding article processed by the pre-alloyed powder of Ti-6Al-4V-1B;
Fig. 4 b is the horizontal Photomicrograph of Fig. 4 a, shows the hexagonal cross-section of titanium boride (TiB) precipitate;
Fig. 5 is the correlation curve figure of the thermal conductivity that forges article with the thermal conductivity of thermal conductivity of pushing article and Ti-6Al-4V article of Ti-6Al-4V-1B (indicating nano Ti64);
Fig. 6 is the correlation curve figure of the thermal conductivity of benchmark article for the thermal conductivity that forges article of Ti-6Al-2Sn-4Zr-2Mo-1B and with Ti-6Al-2Sn-4Zr-2Mo;
Fig. 7 is the correlation curve figure of resistivity of the resistivity that forges article and the Ti-6Al-4V article of Ti-6Al-4V-1B (indicating nano Ti64); With
Fig. 8 is the correlation curve figure of the resistivity of benchmark article for the resistivity that forges article of Ti-6Al-2Sn-4Zr-2Mo-1B and with Ti-6Al-2Sn-4Zr-2Mo.
Embodiment
To the multi-component titanium alloy as Ti-6Al-4V (Ti-64) and Ti-6Al-2Sn-4Zr-2Mo (Ti-6242), the method that improves its thermal conductivity and reduce its resistivity is described below.These methods comprise two main points:
1) titanium boride (TiB) precipitate is mixed in the titanium alloy; With
2) through metal fever processing titanium boride (TiB) precipitate is arranged on required direction.
Can realize boron is introduced titanium alloy component and then produced titanium boride (TiB) precipitate through several kinds of diverse ways, said method be forged processing or the PM technique as gas atomization method and complex element method like casting, casting.Boron be introduced into and is in liquid titanium alloy, thereby boron is melted in the liquid titanium alloy fully.Boron can powder metallurgy the mixing of mode through pressed powder be added into titanium alloy.Be not limited to the mode that boron is added titanium alloy, boron can be added into boron, TiB2 (TiB2) or any mode that comprises the suitable master alloy of boron.The weight percentage ranges that adds the amount of boron is from 0.01% to 18.4%.According to the composition of titanium alloy, add the weight percentage ranges more preferably from 0.01% to 2% of the amount of boron.
Picture forges, the hot worked operations of metal such as roll extrusion and extruding can be used to be implemented in along on the metal flow direction to the arrangement of titanium boride (TiB) precipitate.
Can carry out present method according to the process flow sheet of gas atomization powder metallurgy as shown in Figure 1.Said boron is added in the fused titanium alloy, thereby the alloy liquation that contains said boron obtains titanium alloy powder through inert gas atomizer.Each powder particle all comprises and is evenly distributed and arranges unordered needle-like titanium boride (TiB) precipitate.Fig. 2 a illustrates the section microstructure example of the powder particle of Ti-6Al-4V-1B, comprises the titanium boride (TiB) (dark part) of 6% volume content (6vol.%) in this example.Use obtains fine and close fully powder compact as the hot isostatic pressing fixed titanium alloy powders of routine techniques such as (HIP).Under the situation of so compression, titanium boride (TiB) precipitate is the lack of alignment for being evenly distributed in titanium alloy structure still.Fig. 2 b illustrates the microstructural example of Ti-6Al-4V-1B at hot isostatic pressing (HIP) back powder.
Next be exactly metal process operation, for example forge, roll extrusion or extruding powder compact.The ordinary hot machined parameters that is used to make the titanium alloy article in the production is applicable to forming the required arrangement on the metal flow direction of titanium boride (TiB) precipitate.Thermomechanical parameter like illustrated example is following:
Fig. 3 is illustrated in the microgram of Ti-6Al-4V-1B article different positions; Said Ti-6Al-4V-1B article under the temperature of 1750-2200 ℉ the stroke speed with 40 inch per minute clocks (inch./min.) be 3.5 with diameter "; high by 16 " powder compact forge for diameter be 8 ", high by 3 " disk.Titanium boride after forging (TiB) needle-like precipitate (dark part) being arranged among Fig. 3 radially is high-visible.Another example shown in Fig. 4 is the microstructure of Ti-6Al-4V-1B article; It is that the stroke speed with 100 inch per minute clocks (inch./min.) is 3 with diameter under the temperature of 2000 ℉ " powder compact to form diameter through extrusion processing be 0.75 " rectangular, said microstructure has demonstrated titanium boride (TiB) precipitate (dark part) along the axial arrangement of extruding.
Several kinds of thermal property and the electrical properties that are mixed with the titanium alloy article (table 1 has provided chemical ingredients) of titanium boride (TiB) are assessed.As a comparison, the titanium alloy that does not have titanium boride (TiB) precipitate has been done identical test.The thermal conductivity test is the test of carrying out according to standard method of test ASTM E1461, and resistivity is measured according to standard method ASTM B84.
Table 1: the chemical ingredients (by weight percentage) of the titanium alloy article of testing.
It among Fig. 5 the comparison diagram that Ti-64-1B (being designated as nano Ti-64) forges the article and the thermal conductivity of thermal conductivity of pushing article and Ti-64 article.Show Ti-64 among the figure than benchmark, in the TR of 70-1250 ℉ nano Ti-64 forge radial thermal conductivity and nano Ti-64 extrusion axis to thermal conductivity higher.
It among Fig. 6 the contrast of the Ti-6242 article thermal conductivity data of the Ti-6242-1B thermal conductivity data and the benchmark that forge article.Also demonstrate the thermal conductivity that increases than benchmark at this material system.The article that titanium boride (TiB) precipitate is arranged along measurement direction are write down thermal conductivity increases by 35%.
It among Fig. 7 the comparison diagram of the resistivity of Ti-64-1B (the being designated as nano Ti-64) resistivity and the Ti-64 article that forge article.Show Ti-64 among the figure, the resistivity that nanoTi-64 forges radially to be reduced in the TR of 70-1500 ℉ than benchmark.It among Fig. 8 the contrast of the Ti-6242 article resistivity data of the Ti-6242-1B resistivity data and the benchmark that forge article.Also demonstrate the resistivity that reduces than benchmark at this material system.The article that titanium boride (TiB) precipitate is arranged along measurement direction are write down resistivity and are reduced by 20%.
Except in the improvement aspect thermal property and the electrical property, the titanium alloy that is mixed with titanium boride (TiB) precipitate has several advantages on mechanical property under the prerequisite that does not reduce ductility and fatigue property.For example, be mixed with the room temperature tensile performance of the benchmark titanium alloy of room temperature tensile performance in table 2 of the titanium alloy article (referring to the example of nano series) of boron.For the titanium alloy of Nano series, keeping under the unit elongation situation identical with their benchmark titanium alloy, than their benchmark titanium alloy, it is high by 25% that its tensile yield strength and US are wanted, and it is high by 20% that its Young's modulus is wanted.
Table 2:, be mixed with the tensile property under the titanium alloy article typical cases room temperature of boron with reference to the nano series alloy.TYS: tensile yield strength, UTS: US, TE: unit elongation, and TM: tensile modulus (modulus in tension).
| Sequence number | Alloy | Article | Direction | TYS，ksi | UTS，ksi | TE，％ | TM，Msi |
| 1 | Ti-64 | Bar-shaped | Axially | 120 | 130 | 13 | 16.9 |
| 2 | Nano?Ti-64 | Forge | Radially | 140 | 154 | 13 | 18.6 |
| 3 | Nano?Ti-64 | Extruding | Axially | 152 | 163 | 10 | 19.9 |
| 4 | Ti-6242 | Bar-shaped | Axially | 131 | 141 | 13 | 16.5 |
| 5 | Nano?Ti-6242 | Forge | Radially | 161 | 170 | 9 | 19.1 |
The embodiment and the embodiment of the optimum of describing about the present invention; Should not be construed as the restriction of the present invention to the embodiment that disclosed; On the contrary, protection scope of the present invention should be included in the spirit of accompanying claims and various variations and the equivalent replacement means in the scope.
Claims (10)
1. method that improves the titanium alloy thermal conductivity and reduce its resistivity comprises:
Boron is introduced titanium alloy separate out titanium boride (TiB) precipitate;
Through metal fever processing titanium boride (TiB) precipitate is arranged along the direction of metal flow.
2. the method for claim 1 is characterized in that: said titanium boride (TiB) precipitate forges processing through casting, casting or PM technique produces.
3. the method for claim 1 is characterized in that: said metal fever is processed as and forges, roll extrusion or extruding.
4. the method for claim 1 is characterized in that: said titanium alloy is the multi-component material like Ti-6Al-4V or Ti-6Al-2Sn-4Zr-2Mo.
5. the method for claim 1, it is characterized in that: the weight percent of said boron in said titanium alloy is about 0.01%-18.4%.
6. the method for claim 1; It is characterized in that: said boron is added into the fused titanium alloy, thereby the alloy liquation behind this adding boron comprises the titanium alloy powder that is evenly distributed and arranges unordered needle-like titanium boride (TiB) precipitate through the inert gas atomizer generation.
7. method as claimed in claim 6 is characterized in that: said titanium alloy powder passes through hot isostatic pressing by fixed.
8. method as claimed in claim 3 is characterized in that: the processing of said metal fever is with stroke speed the forging powder compact of about 40 inch per minute clocks under the temperature of about 1750-2000 ℉.
9. method as claimed in claim 3 is characterized in that: the processing of said metal fever is with the extrusion processing to powder compact of the stroke speed of about 100 inch per minute clocks under the temperature of about 2000 ℉.
10. the method for claim 1 is characterized in that: the ductility of said titanium alloy or fatigue property do not reduce.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US12/923,056 | 2010-11-12 | ||
| US12/923,056 US20120118433A1 (en) | 2010-11-12 | 2010-11-12 | Method of modifying thermal and electrical properties of multi-component titanium alloys |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102465217A true CN102465217A (en) | 2012-05-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011102296938A Pending CN102465217A (en) | 2010-11-12 | 2011-08-11 | Method of modifying thermal and electrical properties of multi-component titanium alloys |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20120118433A1 (en) |
| EP (1) | EP2453029A1 (en) |
| JP (1) | JP2012102394A (en) |
| KR (1) | KR20120051572A (en) |
| CN (1) | CN102465217A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109722564A (en) * | 2019-01-10 | 2019-05-07 | 青海聚能钛金属材料技术研究有限公司 | Ti-6242 titanium alloy and preparation method thereof |
| CN109722565A (en) * | 2019-01-10 | 2019-05-07 | 青海聚能钛金属材料技术研究有限公司 | High temperature resistant titanium alloy and its preparation method and application |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE69128692T2 (en) * | 1990-11-09 | 1998-06-18 | Toyoda Chuo Kenkyusho Kk | Titanium alloy made of sintered powder and process for its production |
| JP4890262B2 (en) * | 2003-12-11 | 2012-03-07 | オハイオ ユニヴァーシティ | Titanium alloy microstructure refinement method and superplastic formation of titanium alloy at high temperature and high strain rate |
| US20060016521A1 (en) * | 2004-07-22 | 2006-01-26 | Hanusiak William M | Method for manufacturing titanium alloy wire with enhanced properties |
| US7879286B2 (en) * | 2006-06-07 | 2011-02-01 | Miracle Daniel B | Method of producing high strength, high stiffness and high ductility titanium alloys |
-
2010
- 2010-11-12 US US12/923,056 patent/US20120118433A1/en not_active Abandoned
-
2011
- 2011-06-30 EP EP11172128A patent/EP2453029A1/en not_active Withdrawn
- 2011-08-11 CN CN2011102296938A patent/CN102465217A/en active Pending
- 2011-08-23 KR KR1020110084208A patent/KR20120051572A/en not_active Application Discontinuation
- 2011-08-31 JP JP2011189256A patent/JP2012102394A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109722564A (en) * | 2019-01-10 | 2019-05-07 | 青海聚能钛金属材料技术研究有限公司 | Ti-6242 titanium alloy and preparation method thereof |
| CN109722565A (en) * | 2019-01-10 | 2019-05-07 | 青海聚能钛金属材料技术研究有限公司 | High temperature resistant titanium alloy and its preparation method and application |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20120051572A (en) | 2012-05-22 |
| JP2012102394A (en) | 2012-05-31 |
| US20120118433A1 (en) | 2012-05-17 |
| EP2453029A1 (en) | 2012-05-16 |
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Application publication date: 20120523 |