WO2020139245A2 - Production method of metal matrix composite material by reinforcements containing chromium carbide - Google Patents
Production method of metal matrix composite material by reinforcements containing chromium carbide Download PDFInfo
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- WO2020139245A2 WO2020139245A2 PCT/TR2019/051068 TR2019051068W WO2020139245A2 WO 2020139245 A2 WO2020139245 A2 WO 2020139245A2 TR 2019051068 W TR2019051068 W TR 2019051068W WO 2020139245 A2 WO2020139245 A2 WO 2020139245A2
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- composite material
- matrix
- metal
- metal matrix
- chromium carbide
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- 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
- C22C32/0052—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 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
- B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy
Definitions
- Technical Field Invention relates to a production method providing metal matrix composite material used for preventing wear of two metallic surfaces working face to face or having an extra resistance against wear, with superior surface properties to be provided by supports both reflecting mechanical properties matrix has and containing chromium carbide, in strategically important sectors such as automotive, machine manufacturing, defence, aviation and space industry.
- Composite materials are the materials displaying a single material property but consisting of chemically different two or more compounds and are manufactured by means of dispersing one or more discontinuous phases in one continuous phase. Since discontinuous phase usually has better properties than continuous phase, it is called strengthening or reinforcing materials while continuous phase is called matrix. Function of matrix material is to keep reinforcing materials together and protect integrity form of material. Reinforcing material is used to develop the properties of matrix materials intended to be improved. Because of need for materials capable for use at temperatures that is higher than temperature of present materials and having higher specific resistance feature, metal matrix composite (MMC) materials have been developed. Al and Al alloys are seen as the matrix materials the most commonly used one in MMC production.
- MMC metal matrix composite
- Al is an element found abundantly in nature and easy to process, light, corrosion strength and capable to be reinforced.
- Al alloys are light, can be produced economically by use of various production methods as well as preferable because of high resistance and corrosion strength. It is possible to improve current properties of Al and its alloys by use of reinforcing members, improve their shear resistance, melting temperature, thermal stability and producibility properties. Materials of various forms like fiber, whisker or particulate are used as reinforcing material for MMC production.
- the reinforcing form having the most common use in industrial practices is particulate form because of easier production and use of particulate reinforcing materials than long fibers and not showing variation in obtained composite structure subject to direction.
- the most commonly reinforcing materials used in Al matrix mixed structures is silicon carbide.
- Ceramic particulates used as reinforcing element needs to apply a pre-treatment in order to enable heating by fluid metal and providing penetration into matrix. Since such processes are cost increasing and process complicating processes such as pre heating, electroless nickel plating or plating by use of different plating methods in order to enhance capability of reinforcing members to be heated by liquid aluminium, cost of composite material is increased. When performing composite production with liquid aluminium by casting method, said preliminary processes are almost necessary because of high surface tensile and chemical properties of aluminium. In addition, big and expensive equipment and instruments are also needed during composite material production with liquid aluminium. Another reason of problem is that it is difficult to disperse ceramic particulates used as reinforcing member into metal matrix homogenously and/or caking of ceramic particulates in the matrix.
- TR2016/07371 discloses continuous compressed metal matrix composite (MMC) and a device performing continuous production developed for such production.
- MMC metal matrix composite
- metal matrix is provided with hardening controlled and homogenous dispersion embodiment of continuous, intermittent an powder reinforced materials in atmosphere and heat controlled conditions at moving compressor, under pressure, and continuous production is provided in varying wall thickness and different diameters in plate, cylinder and tube form.
- the system disclosed under the invention provides obtaining flat metal and alloys in compressed structure and particularly mass production of metals difficult to produce, such as magnesium in the stated forms.
- the present invention relates to metal matrix composite material production method reinforced with reinforcing members comprise chromium carbide, meeting above mentioned needs, eliminating all disadvantages and providing additional some advantages.
- Main purpose of the invention is to improve the properties restricting usage area of the aluminium and aluminium alloys such showing inadequate abrasive resistance and not being used at high temperatures, with reinforcements comprising chromium carbide having too high corrosion resistance, resistant against high temperature, resistant against corrosion and oxidization.
- Purpose of invention is to develop a new metal matrix composite both reflecting mechanical properties of matrix and having superior surface properties to be provided by reinforcing members comprising chromium carbide.
- Purpose of the invention is to provide production without need for additional heating and cost inputs by eliminating preliminary process required in conventional casting processes for heating reinforcing member by aluminium and alloys. Thus, great gaining is provided in cost and time.
- Purpose of the invention is to produce composite material without need for temperatures required for liquid metal. Thus, saving in cost is provided as heating inputs required for melting procedure is not needed.
- a Purpose of the invention is to eliminate pelletizing issue of reinforcing members added into liquid metal due to random dispersion thereof. By means of the method disclosed under the invention, reinforcing members are added in a controlled manner and pelletizing issue is not encountered.
- a further purpose of the invention is to increase matrix hardness to 300 - 500 % in new generation composite material.
- Hardness of the developed new generation composite material is watered, that is martensitic steel hardness (e.g. 50-55 HRC) is achieved.
- Another purpose of the invention is to provide a working time period longer than working time periods of metal matrix composites in comparison of the material with other aluminium and alloys at about maximum working temperature of 270 C in aluminium with relative thermal barrier provided on surface by reinforcing members comprising chromium carbide. Mechanical properties and shape of composite material developed in this way is kept stable for a while without any change.
- Another purpose of the invention is to produce metal matrix composite wherein both metal shaping and plating aluminium alloy surface with reinforcement comprising chromium carbide are made in one same process step by use of semi-solid casting method. With this method wherein shaping and composite material production are made at the same time, saving in time and cost is provided and a new material having superior mechanical properties is produced.
- Another purpose of the invention is to provide resistance against deformation or change in shape in a hot ambience at a level similar to matrix since metal matrix composites contributed by reinforcements comprising chromium carbide have thermal conductivity close to matrix material. Thus, it provides a striking superiority in terms of material life and potential to undergo damage when compared to other metal matrix composites.
- the invention relates to a production method of metal matrix composite material used for preventing wear of two metallic surfaces working face to face or having an extra resistance against wear in strategically important sectors such as automotive, machine manufacturing, defence, aviation and space industry, characterized in comprising following process steps of
- Figure 1 is an illustrative detailed view of metal matrix composite material obtained by method of the invention.
- Figure 2 is a cross-section view of metal matrix composite material obtained by method of the invention.
- the invention relates to a production method providing improvement the properties restricting usage area of the aluminium and aluminium alloys such showing inadequate abrasive resistance and not being used at high temperatures, with reinforcements comprising chromium carbide having too high corrosion resistance, resistant against high temperature, resistant against corrosion and oxidization.
- the invention particularly relates to production of a new metal matrix composite material (10) both reflecting mechanical properties of matrix (14) and having superior surface properties to be provided by reinforcing members comprising chromium carbide.
- said powder mixture constitutes reinforcement member defined as ceramic particulate (1 1 ) and providing wear resistance to composite and other surface properties.
- the obtained ceramic particulates (1 1 ) are dispersed into metal mould and then are baked together with aluminium alloy raw material to be used as saddle.
- Alignium raw material is the part defined as matrix (14) and constituting most part of composite material.
- Ceramic particulates (1 1 ) and matrix (14) are heated up to semi-solid temperature at which the metal is liquid at certain level and solid at certain level and shows thixotropic property (liquid when there is physical effect, solid when physical effect is over).
- Ceramic particulates (1 1 ) and matrix (14) are removed from oven and pressed onto metal moulding by hydraulic press.
- Composite material (10) is removed from mould and cooled down in air to room temperature.
- the first process of preparing reinforcements comprising chromium carbide is the production of chromium carbide by mechanical alloying. Then, reinforcements are added into chromium carbide and blended in grinder.
- Figure 1 shows an illustrative detailed view of metal matrix composite material (10) obtained by method of the invention.
- the steps occurring after stage of removal of powder mixture (1 1 ) and aluminium saddle (14) from furnace and pressing by hydraulic press on metal mould are as follows: aluminium saddle (14) of thixostropic structure starts to flow like liquid under physical effect, and fills in the moulding space, after moulding space is filled, pressure increases and penetration of aluminium acting like liquid into spaces in powder mixture between aluminium (14) and moulding occurs too fast under pressure effect and thus the area defined as metal leaked in between particulates (12) is formed. Although drawn in big size in Figure 1 , this area is actually very small (for instance micron).
- Composite area depth (A) can also be defined as reinforcing depth and is the layer formed on surface and is resistant against wear. In a preferred embodiment of the invention, composite area depth (A) is 2-3 mm.
- Composite width (B) is the area exposed to corrosion and other surface effects. In a preferred embodiment of the invention, composite width (B) is 10 mm.
- Composite area depth (A) and composite width (B) are of nature variable in line with values allowed by the moulding used therein. In addition, said values can also be reduced and increased by means of various moulting geometries.
- Ceramic particulates (1 1 ) display resistance against corrosion thanks to high harness and prevents penetration of high temperature to matrix (14) for a specific time period thanks to its bond structure it contains.
- Intermediate surface (13) prevents breaking of matrix (14) under load of reinforcing member under working conditions (for example corrosion) and thus prevents damage to material.
- Matrix (14) is saddle material and base of all composites are based on this phase.
- Hardness of the developed new generation composite material (10) of the matrix (14) is increased to 300 - 500 % and watered that is martensitic steel hardness (e.g. 50-55 HRC) is achieved.
- a working time period longer than working time periods of metal matrix composites is provided in comparison of the material with other aluminium and alloys at about maximum working temperature of 270 C in aluminium with relative thermal barrier provided on surface by reinforcing members comprising chromium carbide. Mechanical properties and shape of composite material (10) developed in this way is kept for a while without any change.
- Metal matrix composite (10) is produced wherein both metal shaping and plating aluminium alloy surface with reinforcement comprising chromium carbide are made in one same process step by use of semi-solid casting method. With this method wherein shaping and composite material production are made at the same time, saving in time and cost is provided and a new material having superior mechanical properties is produced.
- Metal matrix composite material (M) obtained by method of the invention can be used particularly in engineering applications (gear, spindle, spindle bearing etc.) requiring high rate of corrosive resistance. It is good for use in cases where no corrosion of two metal working face to face is desired or where extra resistance against corrosion is required. Most systems comprising moving parts can move by help of parts such as gearing, spindles etc. In addition to proper design of such parts to transmit the motion in the most efficient way, the materials from which such parts are produced must be met some main criteria. For instance, the most important factor determining life of a gearing is the resistance it has against wear. In other words, the higher the corrosion resistance of gear is the longer the life is and naturally, maintenance costs will be lower too.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Powder Metallurgy (AREA)
- Manufacture Of Alloys Or Alloy Compounds (AREA)
Abstract
Production method of metal matrix composite material by reinforcements containing chromium carbide Invention relates to a production method of metal matrix composite material (10) used for preventing wear of two metallic surfaces working face to face or having an extra resistance against wear to provide metal matrix composite material (10) has superior surface properties both reflecting mechanical properties of the matrix (14) and comprising chromium carbide reinforcements in strategically important sectors such as automotive, machine manufacturing, defence, aviation and space industry.
Description
Production method of metal matrix composite material by reinforcements containing chromium carbide
Technical Field Invention relates to a production method providing metal matrix composite material used for preventing wear of two metallic surfaces working face to face or having an extra resistance against wear, with superior surface properties to be provided by supports both reflecting mechanical properties matrix has and containing chromium carbide, in strategically important sectors such as automotive, machine manufacturing, defence, aviation and space industry.
Present State of the Art
Composite materials are the materials displaying a single material property but consisting of chemically different two or more compounds and are manufactured by means of dispersing one or more discontinuous phases in one continuous phase. Since discontinuous phase usually has better properties than continuous phase, it is called strengthening or reinforcing materials while continuous phase is called matrix. Function of matrix material is to keep reinforcing materials together and protect integrity form of material. Reinforcing material is used to develop the properties of matrix materials intended to be improved. Because of need for materials capable for use at temperatures that is higher than temperature of present materials and having higher specific resistance feature, metal matrix composite (MMC) materials have been developed. Al and Al alloys are seen as the matrix materials the most commonly used one in MMC production. Al is an element found abundantly in nature and easy to process, light, corrosion strength and capable to be reinforced. Al alloys are light, can be produced economically by use of various production methods as well as preferable because of high resistance and corrosion strength. It is possible to improve current properties of Al and its alloys by use of reinforcing members, improve their shear resistance, melting temperature, thermal stability and producibility properties.
Materials of various forms like fiber, whisker or particulate are used as reinforcing material for MMC production. The reinforcing form having the most common use in industrial practices is particulate form because of easier production and use of particulate reinforcing materials than long fibers and not showing variation in obtained composite structure subject to direction. The most commonly reinforcing materials used in Al matrix mixed structures is silicon carbide.
Ceramic particulates used as reinforcing element needs to apply a pre-treatment in order to enable heating by fluid metal and providing penetration into matrix. Since such processes are cost increasing and process complicating processes such as pre heating, electroless nickel plating or plating by use of different plating methods in order to enhance capability of reinforcing members to be heated by liquid aluminium, cost of composite material is increased. When performing composite production with liquid aluminium by casting method, said preliminary processes are almost necessary because of high surface tensile and chemical properties of aluminium. In addition, big and expensive equipment and instruments are also needed during composite material production with liquid aluminium. Another reason of problem is that it is difficult to disperse ceramic particulates used as reinforcing member into metal matrix homogenously and/or caking of ceramic particulates in the matrix. Another important issue is deformation of chemical composition of reinforcing as a result of occurrence of different compositions other than metal because of reactions that the added reinforcing member’s potentiality to go into as soon as contacting liquid aluminium. Thus, the efficiency of reinforcing member decreases and physical, chemical and mechanical properties expected from reinforcing are not met.
When surface conditions of ceramic particulate composites used in present applications are examined, it is seen that such surface properties are mostly close to properties of material used in the matrix. In application, 10% to 20% of proportional rate of reinforcing member is mostly dispersed and added in matrix homogenously to produce composite material. Therefore, surface and centre of composite material show similar physical, chemical and mechanical properties. In particular, such composite structure fails to meet the specific requirements, such as wear. For instance, in the literature it has been observed that 3750 Vickers reinforcing member and a composite having 1 16 Vickers matrix hardness can be increased to 166 Vickers at most.
Since composite material displays properties close to matrix material properties, maximum working temperature of material is limited to 270 Ό which is maximum temperature allowed by matrix (aluminium). It is seen that corrosion resistance decreases due to occurrence of galvanic cell. There is big thermal expansion difference between reinforcing member in metal matrix composite material and material constituting matrix. For that reason, when material heats up, inner tension of the material increases, which in the end causes shorter life of material and increase of damage potential.
In the literature an application numbered US6547850B1 is seen related to the subject. Said application discloses a method for mixing particles in a liquid or semi-liquid medium for the production of stir-cast metal matrix composite (MMC) materials. Said application uses silicon carbide or aluminium oxide as ceramic particle.
Application numbered TR2016/07371 discloses continuous compressed metal matrix composite (MMC) and a device performing continuous production developed for such production. In the developed system, metal matrix is provided with hardening controlled and homogenous dispersion embodiment of continuous, intermittent an powder reinforced materials in atmosphere and heat controlled conditions at moving compressor, under pressure, and continuous production is provided in varying wall thickness and different diameters in plate, cylinder and tube form. The system disclosed under the invention provides obtaining flat metal and alloys in compressed structure and particularly mass production of metals difficult to produce, such as magnesium in the stated forms.
In conclusion, due to above mentioned negativities and deficiencies, it is needed to make novelty in the prior art. Brief Description of the Invention
The present invention relates to metal matrix composite material production method reinforced with reinforcing members comprise chromium carbide, meeting above mentioned needs, eliminating all disadvantages and providing additional some advantages.
Main purpose of the invention is to improve the properties restricting usage area of the aluminium and aluminium alloys such showing inadequate abrasive resistance and not being used at high temperatures, with reinforcements comprising chromium carbide having too high corrosion resistance, resistant against high temperature, resistant against corrosion and oxidization.
Purpose of invention is to develop a new metal matrix composite both reflecting mechanical properties of matrix and having superior surface properties to be provided by reinforcing members comprising chromium carbide.
Purpose of the invention is to provide production without need for additional heating and cost inputs by eliminating preliminary process required in conventional casting processes for heating reinforcing member by aluminium and alloys. Thus, great gaining is provided in cost and time.
Purpose of the invention is to produce composite material without need for temperatures required for liquid metal. Thus, saving in cost is provided as heating inputs required for melting procedure is not needed.
A Purpose of the invention is to eliminate pelletizing issue of reinforcing members added into liquid metal due to random dispersion thereof. By means of the method disclosed under the invention, reinforcing members are added in a controlled manner and pelletizing issue is not encountered.
A further purpose of the invention is to increase matrix hardness to 300 - 500 % in new generation composite material. Hardness of the developed new generation composite material is watered, that is martensitic steel hardness (e.g. 50-55 HRC) is achieved.
Another purpose of the invention is to provide a working time period longer than working time periods of metal matrix composites in comparison of the material with other aluminium and alloys at about maximum working temperature of 270 C in aluminium with relative thermal barrier provided on surface by reinforcing members comprising chromium carbide. Mechanical properties and shape of composite material developed in this way is kept stable for a while without any change.
Another purpose of the invention is to produce metal matrix composite wherein both metal shaping and plating aluminium alloy surface with reinforcement comprising
chromium carbide are made in one same process step by use of semi-solid casting method. With this method wherein shaping and composite material production are made at the same time, saving in time and cost is provided and a new material having superior mechanical properties is produced. Another purpose of the invention is to provide resistance against deformation or change in shape in a hot ambience at a level similar to matrix since metal matrix composites contributed by reinforcements comprising chromium carbide have thermal conductivity close to matrix material. Thus, it provides a striking superiority in terms of material life and potential to undergo damage when compared to other metal matrix composites.
In order to achieve above mentioned purposes, the invention relates to a production method of metal matrix composite material used for preventing wear of two metallic surfaces working face to face or having an extra resistance against wear in strategically important sectors such as automotive, machine manufacturing, defence, aviation and space industry, characterized in comprising following process steps of
• preparation of ceramic particles comprising chromium carbide and mixing homogenously,
• spreading obtained ceramic particulates into metal mould and then baking together with raw material (matrix) of aluminium alloy to be used as saddle, · heating ceramic particulates and matrix up to semi-solid temperature where metal is liquid at a certain level and is solid at a certain level and shows thixostropic property,
• removal of ceramic particulates and matrix from furnace and pressing onto metal mould by hydraulic press to provide metal matrix composite material has superior surface properties both reflecting mechanical properties of the matrix and comprising chromium carbide reinforcements.
The structural and characteristic properties and all advantages of the invention will be understood better in the figures given below and the detailed description by reference
to the figures. Therefore, the assessment should be made based on the figures and taking into account the detailed descriptions.
Brief Description of the Drawings
Figure 1 is an illustrative detailed view of metal matrix composite material obtained by method of the invention.
Figure 2 is a cross-section view of metal matrix composite material obtained by method of the invention.
The drawings are not necessarily to be scaled and the details not necessary for understanding the present invention might have been neglected. In addition, the components which are equivalent to great extent at least or have equivalent functions at least have been assigned the same number.
Description of Part References
10. Metal matrix composite material
11. Ceramic particulate 12. Metal leaked in between particulates
13. Intermediate surface
14. Matrix
A. Composite area depth
B. Composite width Detailed Description of the Invention
In this detailed description, production method providing metal matrix composite material (10) reinforced by reinforcing members comprising chromium carbide, used in cases where it is desired to prevent wear of two metallic surfaces working face to face or have an extra resistance against wear, in strategically important sectors such as automotive, machine manufacturing, defense, aviation and space industry has been
described in a manner not forming any restrictive effect and only for purpose of better understanding of the matter.
The invention relates to a production method providing improvement the properties restricting usage area of the aluminium and aluminium alloys such showing inadequate abrasive resistance and not being used at high temperatures, with reinforcements comprising chromium carbide having too high corrosion resistance, resistant against high temperature, resistant against corrosion and oxidization. The invention particularly relates to production of a new metal matrix composite material (10) both reflecting mechanical properties of matrix (14) and having superior surface properties to be provided by reinforcing members comprising chromium carbide.
• Reinforcements comprising chromium carbide (powder blending) are prepared and mixed homogenously.
(said powder mixture constitutes reinforcement member defined as ceramic particulate (1 1 ) and providing wear resistance to composite and other surface properties.)
• The obtained ceramic particulates (1 1 ) are dispersed into metal mould and then are baked together with aluminium alloy raw material to be used as saddle.
(Aluminium raw material is the part defined as matrix (14) and constituting most part of composite material.)
• Ceramic particulates (1 1 ) and matrix (14) are heated up to semi-solid temperature at which the metal is liquid at certain level and solid at certain level and shows thixotropic property (liquid when there is physical effect, solid when physical effect is over).
• Ceramic particulates (1 1 ) and matrix (14) are removed from oven and pressed onto metal moulding by hydraulic press.
• Composite material (10) is removed from mould and cooled down in air to room temperature.
The first process of preparing reinforcements comprising chromium carbide is the production of chromium carbide by mechanical alloying. Then, reinforcements are added into chromium carbide and blended in grinder.
Figure 1 shows an illustrative detailed view of metal matrix composite material (10) obtained by method of the invention. The steps occurring after stage of removal of powder mixture (1 1 ) and aluminium saddle (14) from furnace and pressing by hydraulic press on metal mould are as follows: aluminium saddle (14) of thixostropic structure starts to flow like liquid under physical effect, and fills in the moulding space, after moulding space is filled, pressure increases and penetration of aluminium acting like liquid into spaces in powder mixture between aluminium (14) and moulding occurs too fast under pressure effect and thus the area defined as metal leaked in between particulates (12) is formed. Although drawn in big size in Figure 1 , this area is actually very small (for instance micron). Following penetration of metal in between particulates, reactions causing formation of intermediate face (13) under effect of temperature and pressure between ceramic particulates (1 1 ) and liquid aluminium (14) and between ceramic particulates (1 1 ). Thanks to these events occurring in the area which is the depth the metal penetrates and is defined as composite area (A), materials (10) defined as composite can be produced. Total thickness (B) of composite equals to depth of the moulding. Composite area depth/ distance (A) varies in proportion to quantity of applied pressure and semi-solid temperature. Connection of composite area depth (A) to aluminium saddle (14) is performed as a result of formation of mechanical and chemical bonds between ceramic particulates (1 1 ) and matrix (14) by effect of chemical reactions occurring in the area defined as intermediate surface (13) and pressure. Figure 2 shows cross-sectional view of metal matrix composite material (10) obtained by method of the invention.
Composite area depth (A) can also be defined as reinforcing depth and is the layer formed on surface and is resistant against wear. In a preferred embodiment of the invention, composite area depth (A) is 2-3 mm.
Composite width (B) is the area exposed to corrosion and other surface effects. In a preferred embodiment of the invention, composite width (B) is 10 mm.
Composite area depth (A) and composite width (B) are of nature variable in line with values allowed by the moulding used therein. In addition, said values can also be reduced and increased by means of various moulting geometries.
Ceramic particulates (1 1 ) display resistance against corrosion thanks to high harness and prevents penetration of high temperature to matrix (14) for a specific time period thanks to its bond structure it contains.
Metal leaked in between particulates (12) provides keeping reinforcing members and matrix (14) together.
Intermediate surface (13) prevents breaking of matrix (14) under load of reinforcing member under working conditions (for example corrosion) and thus prevents damage to material.
Matrix (14) is saddle material and base of all composites are based on this phase.
the invention;
• Preliminary heating need required in conventional processes for watering reinforcing members of aluminium and alloys is eliminated and thus production is provided without need for additional heating and cost inputs. Thus, great gaining is provided in cost and time.
• Composite material is produced without need for heating up to temperatures needed for liquid material and thus saving in cost is provided as heating inputs required for melting procedure is not needed.
• Reinforcing members are added in a controlled manner and as a result pelletizing issue is not encountered.
• Hardness of the developed new generation composite material (10) of the matrix (14) is increased to 300 - 500 % and watered that is martensitic steel hardness (e.g. 50-55 HRC) is achieved.
• A working time period longer than working time periods of metal matrix composites is provided in comparison of the material with other aluminium and alloys at about maximum working temperature of 270 C in aluminium with relative thermal barrier provided on surface by reinforcing members comprising chromium carbide. Mechanical properties and shape of composite material (10) developed in this way is kept for a while without any change.
• Metal matrix composite (10) is produced wherein both metal shaping and plating aluminium alloy surface with reinforcement comprising chromium carbide are made in one same process step by use of semi-solid casting method. With this method wherein shaping and composite material production are made at the same time, saving in time and cost is provided and a new material having superior mechanical properties is produced.
• Resistance against deformation or change in shape in a hot ambience is provided at a level similar to matrix (14) since metal matrix composites (10) contributed by reinforcements comprising chromium carbide have thermal conductivity close to matrix material. Thus, it provides a striking superiority in terms of material life and potential to undergo damage when compared to other metal matrix composites.
Metal matrix composite material (M) obtained by method of the invention can be used particularly in engineering applications (gear, spindle, spindle bearing etc.) requiring high rate of corrosive resistance. It is good for use in cases where no corrosion of two metal working face to face is desired or where extra resistance against corrosion is required. Most systems comprising moving parts can move by help of parts such as gearing, spindles etc. In addition to proper design of such parts to transmit the motion in the most efficient way, the materials from which such parts are produced must be met some main criteria. For instance, the most important factor determining life of a gearing is the resistance it has against wear. In other words, the higher the corrosion resistance of gear is the longer the life is and naturally, maintenance costs will be lower too.
When the metal matrix composite material (M) obtained by method of the invention is used in an application like gear example, the gear life will be longer and gear efficiency
will be increased. Field of application is not only limited to gear, and it has potential of use where corrosion is a problem for part. Among examples for application fields are: connecting rod exposed to stress mechanically the most in engine, cylinder sleeve where maximum corrosion resistance is desired and heat transmission is sensitive and intensive, hand tools (keys) where weight is essential in terms of ergonomics and corrosion determines use life, brake disks where high corrosion resistance and heat distribution and friction coefficient are of critical values (eg. 0,35 - 0,60). Corrosion resistance is improved by help of layer comprising chromium carbide providing corrosion resistance and where level is adjustable by help of our manufacturing method in mm on the surface.
Claims
1. A production method of metal matrix composite material (10) used for preventing wear of two metallic surfaces working face to face or having an extra resistance against wear in strategically important sectors such as automotive, machine manufacturing, defence, aviation and space industry, characterized in comprising following process steps of
• preparation of ceramic particles (1 1 ) comprising chromium carbide and mixing homogenously,
• spreading obtained ceramic particulates (11 ) into metal mould and then baking together with raw material (matrix) (14) of aluminium alloy to be used as saddle,
• heating ceramic particulates (1 1 ) and matrix (14) up to semi-solid temperature where metal is liquid at a certain level and is solid at a certain level and shows thixotropic property,
• removal of ceramic particulates (1 1 ) and matrix (14) from furnace and pressing onto metal mould by hydraulic press to provide metal matrix composite material (10) has superior surface properties both reflecting mechanical properties of the matrix (14) and comprising chromium carbide reinforcements.
2. A metal matrix composite material (10) obtained by use of method of claim 1 , characterized in that composite area depth (A) is 2-3 mm.
3. A metal matrix composite material (10) obtained by use of method of claim 1 , characterized in that composite width (B) is 10 mm.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TR2018/21000 | 2018-12-28 | ||
| TR2018/21000A TR201821000A2 (en) | 2018-12-28 | 2018-12-28 | Production method of metal matrix composite material doped with chromium carbide reinforcements |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO2020139245A2 true WO2020139245A2 (en) | 2020-07-02 |
| WO2020139245A3 WO2020139245A3 (en) | 2020-10-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/TR2019/051068 WO2020139245A2 (en) | 2018-12-28 | 2019-12-12 | Production method of metal matrix composite material by reinforcements containing chromium carbide |
Country Status (2)
| Country | Link |
|---|---|
| TR (1) | TR201821000A2 (en) |
| WO (1) | WO2020139245A2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112872351A (en) * | 2021-01-13 | 2021-06-01 | 太原理工大学 | Preparation method of hybrid synergistic reinforced iron-based wear-resistant material |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5616167A (en) * | 1993-07-13 | 1997-04-01 | Eckert; C. Edward | Method for fluxing molten metal |
| SE528376C2 (en) * | 2004-12-10 | 2006-10-31 | Magnus Wessen | Method and apparatus for producing a liquid-solid metal composition |
| US11338360B2 (en) * | 2016-02-04 | 2022-05-24 | Intellectual Property Holdings, Llc | Device and method for forming a metal matrix composite vehicle component |
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2018
- 2018-12-28 TR TR2018/21000A patent/TR201821000A2/en unknown
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2019
- 2019-12-12 WO PCT/TR2019/051068 patent/WO2020139245A2/en active Application Filing
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| CN112872351A (en) * | 2021-01-13 | 2021-06-01 | 太原理工大学 | Preparation method of hybrid synergistic reinforced iron-based wear-resistant material |
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