CN103122426B - Titanium-based powder metallurgy brake disc material and preparation method thereof - Google Patents
Titanium-based powder metallurgy brake disc material and preparation method thereof Download PDFInfo
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- CN103122426B CN103122426B CN201310073743.7A CN201310073743A CN103122426B CN 103122426 B CN103122426 B CN 103122426B CN 201310073743 A CN201310073743 A CN 201310073743A CN 103122426 B CN103122426 B CN 103122426B
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Abstract
The invention discloses a titanium-based powder metallurgy material which comprises the following components by atomic percent: 49.1-52.6% of Ti, 43.2-45.6% of Al, 3.4-4.7% of Ni and the balance of C. A preparation method of the titanium-based powder metallurgy material comprises the following steps of: pre-preparing titanium-based powder with granularity of less than 120nm; under protection of an inert gas, mixing the powder according to the component proportion; performing high-energy ball milling of the mixed powder in a ball milling tank under the protection of the inert gas; and placing the ball-milled powder in a die, and sintering the powder in a hot-press vacuum condition, wherein the vacuum degree is less than 10*10<-3>Pa, the sintering temperature is 850-925 DEG C, the hot-press pressure is 82-92MPa, and the sintering time is 70 minutes. A brake disc made of the titanium-based powder has wear resistance in a high-temperature dry friction condition, and thus the service life of the brake disc is long.
Description
Technical field
The invention belongs to the material technology field for brake flange, especially relate to a kind of powder alloy material for automobile brake disc.
Background technology
Automobile brake disc is the main parts size of automotive disc brake, when braking automobile, overwhelming majority kinetic energy is converted to heat energy, wherein 90% heat is by brake flange bulk absorption, the special automobile of working as travels in the descending section such as plateau, mountain region, brake system non-stop run, brake flange surface temperature can reach 400～600 DEG C, and color is the bolarious condition of high temperature.
At present, along with people's energy-conservation and efficient pursuit to product, advanced design concept often higher taking use temperature, quality is lighter and travelling speed sooner for basic.But the performance of present used common metal material system is through approaching their limit, further develop the material that just needs development of new.Generally believe now, taking intermetallic compound TiAl and Ti3Al, compound as between basic titanium-based metal most possibly meets above-mentioned design requirements, the lightening fire resistant structured material of new generation that has application potential most, be expected to aviation, power station turbine and combustion turbine engine particularly the component such as automobile brake disc in producing, be used widely.The manufacture method of titanium aluminum alloy is generally precision casting or forge hot, use the component of precision casting or hot forging method manufacture to have some performance deficiencies, as brittleness at room temperature and poor forming property (cold and hot working performance and castability), powder metallurgy process can once be made clean shaping prod, solve processing difficulties and improve material use efficiency, but conventional powder metallurgy sintered method is less demanding to powder size, cause organize thick, do not solve titanium-based metal alloy fragility large, be difficult for the problem of processing.
Summary of the invention
The object of the present invention is to provide a kind of titanium base powder metallurgy brake flange material and manufacture method thereof, overcome conventional casting, forging and sintered titanium aluminum alloy organization thick, be difficult to mechanical workout, the defect of close grain titanium base alloy cannot be produced, the wear resistance of brake flange under high temperature DRY SLIDING can be significantly improved.
The percentage composition content of titanium base powder metallurgy material is: Ti 49.1%～52.6%, and Al 43.2%～45.6%, Ni 3.4%～4.7%, all the other are C.
Described powder purity is 99.6%, and the granularity of described Ti and Al is 55 μ m～75 μ m, and Ni granularity is 65 μ m～85 μ m
The manufacture method of this titanium base powder metallurgy comprises the following steps:
(1) prefabricated titanium based powders granularity is < 120nm,
(2) under protection of inert gas, by composition proportion preparation powder,
(3) under protection of inert gas, in ball grinder, the powder preparing is carried out to high-energy ball milling,
(4) ball milling is placed in to mould with the powder becoming in advance
(5) under hot pressing vacuum condition, powder is carried out to sintering, vacuum tightness is < 10 × 10
-3pa, sintering temperature is 850～925 DEG C, and hot pressing pressure is 82～92MPa, and sintering time is 50～70 min.
Such scheme is more preferably:
Described prefabricated titanium based powders granularity is < 100nm.
Described rare gas element is argon gas or helium.
Described drum's speed of rotation is 300～450r/min.
Described ratio of grinding media to material is 14 ﹕ 1.
Vacuum tightness is 8 × 10
-3pa, sintering temperature is 860～920 DEG C, and hot pressing pressure is 85～90MPa, and sintering time is 60 min.
Described Ball-milling Time is 10～15 hours.
Embodiment
Titanium base powder alloy is the TiAl-Ni-TiC alloy taking TiAl as major ingredient.Ni, as matrix metal, increases its content, can put forward heavy alloyed intensity, but can make the lower hardness of alloy.Can improve the wettability of liquid metal to TiC, TiC crystal grain is attenuated.When Ni content one timing (as containing 4%Ni), can put forward heavy alloyed intensity and hardness.
Embodiment 1, this titanium base powder metallurgy brake flange material, its composition and atom percentage content are: Ti49.1%, Al43.2%, Ni3.4%, all the other are C.By the method for the brake flange of this component titanium base powder metallurgy manufacture be: (1) prefabricated titanium based powders granularity is < 120nm, preferably powder particle size is < 100nm, (2) under the protection of rare gas element argon gas, by composition proportion preparation powder, (3) under the protection of rare gas element argon gas, in ball grinder, the powder preparing is carried out to high-energy ball milling, drum's speed of rotation is 300～450r/min, along with extending rotating speed, Ball-milling Time increases, but the too fast DeGrain of rotating speed, preferred rotating speed is 400r/min, Ball-milling Time is 10 hours, can utilize motor inverter accurately to reconcile rotating speed.(4) ball milling is placed in to mould with the powder becoming in advance, (5), under hot pressing vacuum condition, carry out sintering to powder, and vacuum tightness is < 10 × 10
-3pa, sintering temperature is 850 DEG C, and hot pressing pressure is 82MPa, and sintering time is 50 min.Thermal sintering rear braking panel surface hardness is HRC=58～65.
Embodiment 2, this titanium base powder metallurgy brake flange material, its composition and atom percentage content are: Ti52.6%, Al43.2%, Ni3.4%, all the other are C.By the method for the brake flange of this component titanium base powder metallurgy manufacture be: (1) prefabricated titanium based powders granularity is < 120nm, preferably powder particle size is < 100nm, (2) under the protection of rare gas element helium, by composition proportion preparation powder, (3) under the protection of rare gas element helium, in ball grinder, the powder preparing is carried out to high-energy ball milling, drum's speed of rotation is 300r/min, along with extending rotating speed, Ball-milling Time increases, but the too fast DeGrain of rotating speed, preferred rotating speed is 450r/min, Ball-milling Time is 15 hours, can utilize motor inverter accurately to reconcile rotating speed.(4) ball milling is placed in to mould with the powder becoming in advance, (5), under hot pressing vacuum condition, carry out sintering to powder, and vacuum tightness is < 8 × 10
-3pa, sintering temperature is 925 DEG C, and hot pressing pressure is 92MPa, and sintering time is 70 min.Thermal sintering rear braking panel surface hardness is HRC=60～65.
Embodiment 3, this titanium base powder metallurgy brake flange material, its composition and atom percentage content are: Ti49.1%, Al45.6%, Ni4.7%, all the other are C.By the method for the brake flange of this component titanium base powder metallurgy manufacture be: (1) prefabricated titanium based powders granularity is < 120nm, preferably powder particle size is < 100nm, (2) under the protection of rare gas element helium, by composition proportion preparation powder, (3) under the protection of rare gas element helium, in ball grinder, the powder preparing is carried out to high-energy ball milling, drum's speed of rotation is 450r/min, Ball-milling Time is 10～15 hours, (4) ball milling is placed in to mould with the powder becoming in advance, (5) under hot pressing vacuum condition, powder is carried out to sintering, vacuum tightness is < 8 × 10
-3pa, sintering temperature is 890 DEG C, and hot pressing pressure is 90MPa, and thermal sintering rear braking panel surface hardness is HRC=60～65.
As nitrogen has also carried out test, hardness is had no significant effect at rare gas element for process in addition.
Embodiment 4, this titanium base powder metallurgy brake flange material, its composition and atom percentage content are: Ti50.3%, Al44.8%, Ni3.5%, all the other are C.By the method for the brake flange of this component titanium base powder metallurgy manufacture be: (1) prefabricated titanium based powders granularity is < 120nm, preferably powder particle size is < 100nm, (2) under the protection of rare gas element helium, by composition proportion preparation powder, (3) under the protection of rare gas element helium, in ball grinder, the powder preparing is carried out to high-energy ball milling, drum's speed of rotation is 430r/min, Ball-milling Time is 12 hours, (4) ball milling is placed in to mould with the powder becoming in advance, (5) under hot pressing vacuum condition, powder is carried out to sintering, vacuum tightness is < 7 × 10
-3pa, sintering temperature is 890 DEG C, and hot pressing pressure is 90MPa, and thermal sintering rear braking panel surface hardness is HRC=60～65.
Compared with the prior art the present invention has following distinguishing feature and positively effect: obtain nanometer-size die by high energy ball mill, then nano level powder is carried out to hot pressing vacuum sintering, obtain the sintering structure of superfine crystal particle, the brake flange same with routine casting, forging method manufacture compared, have fine microstructures densification, surperficial and inherent hardness is high.
Full-scale brake flange to above-mentioned three kinds of embodiment manufactures has carried out inertia force bench testing,
Test conditions: press MIL-W-5013K
Testing installation: large-scale electrical analogy inertia momentum test platform
Concrete outcome is as follows:
Claims (10)
1. a titanium base powder metallurgy brake flange material, is characterized in that: the percentage composition content of its metallurgical powder material is: Ti 49.1%～52.6%, and Al 43.2%～45.6%, Ni 3.4%～4.7%, all the other are C.
2. titanium base powder metallurgy brake flange material according to claim 1, is characterized in that: described powder purity is 99.6%, and the granularity of described Ti and Al is 55 μ m～75 μ m, and Ni granularity is 65 μ m～85 μ m.
3. the manufacture method of a kind of titanium base powder metallurgy brake flange material according to claim 1, is characterized in that:
Prefabricated titanium based powders granularity is < 120nm,
Under protection of inert gas, by composition proportion preparation powder,
Under protection of inert gas, in ball grinder, the powder preparing is carried out to high-energy ball milling,
Ball milling is placed in to mould with the powder becoming in advance,
Under hot pressing vacuum condition, powder is carried out to sintering, vacuum tightness is < 10 × 10
-3pa, sintering temperature is 850～925 DEG C, and hot pressing pressure is 82～92MPa, and sintering time is 50～70 min.
4. the manufacture method of a kind of titanium base powder metallurgy brake flange material according to claim 3, is characterized in that: described prefabricated titanium based powders granularity is < 100nm.
5. the manufacture method of a kind of titanium base powder metallurgy brake flange material according to claim 3, is characterized in that: described rare gas element is argon gas or helium.
6. according to the manufacture method of a kind of titanium base powder metallurgy brake flange material described in claim 3 to 5 any one, it is characterized in that: described drum's speed of rotation is 300～450r/min.
7. according to the manufacture method of a kind of titanium base powder metallurgy brake flange material described in claim 3 to 5 any one, it is characterized in that: the ratio of grinding media to material of described high-energy ball milling is 14 ﹕ 1.
8. according to the manufacture method of a kind of titanium base powder metallurgy brake flange material described in claim 3 to 5 any one, it is characterized in that: vacuum tightness is 8 × 10
-3pa, sintering temperature is 860～920 DEG C, and hot pressing pressure is 85～90MPa, and sintering time is 60 min.
9. the manufacture method of a kind of titanium base powder metallurgy brake flange material according to claim 6, is characterized in that: the Ball-milling Time of described high-energy ball milling is 10～15 hours.
10. the manufacture method of a kind of titanium base powder metallurgy brake flange material according to claim 7, is characterized in that: the Ball-milling Time of described high-energy ball milling is 10～15 hours.
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| CN201310073743.7A CN103122426B (en) | 2013-03-08 | 2013-03-08 | Titanium-based powder metallurgy brake disc material and preparation method thereof |
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| CN201310073743.7A CN103122426B (en) | 2013-03-08 | 2013-03-08 | Titanium-based powder metallurgy brake disc material and preparation method thereof |
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| CN104674038B (en) * | 2015-02-13 | 2017-01-25 | 华南理工大学 | Alloy material with high strength as well as ductility and semi-solid state sintering preparation method and application of alloy material |
| CN115401198B (en) * | 2022-10-31 | 2023-03-24 | 中国航发沈阳黎明航空发动机有限责任公司 | Preparation method of brazing wear-resistant alloy preform |
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| CA2057373A1 (en) * | 1991-05-06 | 1992-11-07 | Donald E. Larsen, Jr. | Tia1 intermetallic articles and method of making same |
| JP3388965B2 (en) * | 1995-11-15 | 2003-03-24 | 三菱重工業株式会社 | TiAl intermetallic compound based alloy |
| JP4287991B2 (en) * | 2000-02-23 | 2009-07-01 | 三菱重工業株式会社 | TiAl-based alloy, method for producing the same, and moving blade using the same |
| CN100537802C (en) * | 2007-02-05 | 2009-09-09 | 中南大学 | A kind of method for preparing high dense TiAl-base alloy |
| CN101701305B (en) * | 2009-12-03 | 2011-06-08 | 陕西科技大学 | TiAl intermetallic compound composite material and preparation method thereof |
| CN102181748B (en) * | 2011-05-26 | 2013-01-02 | 洛阳双瑞精铸钛业有限公司 | Titanium-aluminum base alloy with excellent room temperature ductility and casting fluidity and preparation method of titanium-aluminum base alloy |
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