CN110218957B - Method for controlling whisker characteristics by titanium-based composite material - Google Patents
Method for controlling whisker characteristics by titanium-based composite material Download PDFInfo
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- C22C49/02—Alloys containing metallic or non-metallic fibres or filaments characterised by the matrix material
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Abstract
The invention belongs to the field of metal material processing, and particularly relates to a method for controlling whisker characteristics by using a titanium-based composite material. The method for controlling the whisker characteristics of the titanium-based composite material comprises the following steps of: 1) preparing preliminary mixed powder, 2) preparing a composite blank, and 3) performing unidirectional forging or multidirectional forging to obtain the titanium-based composite material with different whisker characteristics; the obtained titanium-based composite material: the matrix is pure titanium or titanium alloy, the size of forged crystal grains is thinned to be below 20 mu m, the whisker reinforcement is TiB or TiC, the whisker reinforcement is in a shape of a slender rod, the diameter is about 0.2-4 mu m, the length-diameter ratio is 4-20, and the tensile strength is 1100-1450 MPa; the whisker distribution is characterized in that the whisker is non-uniformly distributed along the space of the edge of the forged matrix particle and is changed along with the change of the matrix form, and the long axis direction of the whisker is related to the deformation process.
Description
Technical Field
The invention belongs to the field of metal material processing, and particularly relates to a method for controlling whisker characteristics by using a titanium-based composite material.
Background
The whisker reinforced metal-based composite material is a composite material which takes metal or alloy as a matrix and is reinforced by various whiskers. Based on the metal or alloy matrix, it can be divided into Al-base, Mg-base, Cu-base, Ti-base, Ni-base, high-temp. alloy base, intermetallic compound and refractory metal base, etc., and the crystal whisker used is SiC or Si3N4、Al2O3·B2O3、K2O·6TiO2、TiB2TiC, ZnO, etc. Such composites have high strength and modulus; the transverse mechanical property is high, the comprehensive mechanical property is good, and the high-temperature performance is good; the heat conduction, the electric conduction and the abrasion resistance are also realized; small thermal expansion coefficient, good dimensional stability, good damping property and the like. The preparation process of the whisker reinforced aluminum-based composite material is mature and forward practicalAnd the titanium-based and intermetallic compound-based high-temperature alloy-based composite materials are difficult to control interfaces and complex in process due to high processing temperature and are not mature enough. The main application objects are the fields of aviation, aerospace and the like.
The titanium-based composite material for controlling the whisker characteristics has a plurality of excellent performances such as high specific strength and the like, so that the titanium-based composite material becomes an important metal structure material and is applied to the fields of aviation, aerospace and weaponry. However, the development and application of the titanium-based composite material for controlling the whisker characteristics are restricted by the problems of room temperature brittleness, difficult subsequent processing and the like of the titanium-based composite material. Therefore, improving plasticity and processability becomes a critical problem in the research of the titanium-based composite material at present.
In recent years, the characteristics and distribution of the reinforcement are considered to be one of effective methods for improving the strength and plasticity of the non-uniform reinforced titanium-based composite material; on the other hand, the thinning of the material matrix structure is also one of effective means for improving the plasticity and the strength, so that the subsequent hot processing of the material is a good choice, and at present, no method capable of effectively controlling the characteristics of the whisker exists.
Disclosure of Invention
The invention aims to provide a method for controlling whisker characteristics of a titanium-based composite material, which solves the technical problem that no method capable of effectively controlling the whisker characteristics of the titanium alloy composite material exists at present, so that the strength and the plasticity of the titanium alloy composite material are regulated and controlled.
The method for controlling the whisker characteristics of the titanium-based composite material comprises the following steps:
1) preparation of preliminary mixed powder
Adhering the reinforcement or the raw material thereof on the surface of the matrix by ball milling to obtain primary mixed powder;
wherein: the matrix is pure titanium or titanium alloy, and the equivalent particle size of the initial particles is 40-200 mu m; the reinforcement or its raw material is pure boron, TiB2Or B4C；
2) Preparation of composite blanks
Sintering the preliminary mixed powder to obtain a composite blank;
3) heating the composite blank, preserving heat, and forging to obtain the titanium-based composite material with different whisker characteristics;
wherein: the forging is one-way forging or multi-stage forging,
the matrix of the obtained titanium-based composite material is titanium alloy, the size of forged crystal grains is thinned to be below 20 mu m, the whisker reinforcement is TiB or TiC, the shape of the whisker reinforcement is a slender rod, the diameter is 0.2-4 mu m, and the length-diameter ratio is 4-20; the whisker distribution is characterized in that the whisker is distributed along the edge of the forged matrix particle in a non-uniform space; the tensile strength is 1100-1450 MPa.
Preferably, the unidirectional forging step is as follows: forging one or more steps along the single direction of the titanium-based composite blank until the accumulated equivalent strain is greater than 0.6, and gradually changing the matrix tissue from the broken lamellar tissue into an equiaxed tissue; the matrix particles in the obtained titanium-based composite material are in an oblate ellipsoid shape, the space structure formed by the quasi-continuous whiskers distributed at the edge of the matrix is in an oblate ellipsoid distribution, the oblate rate of the ellipsoid is 0.60-0.95, and the tensile strength of the obtained titanium-based composite material is 1100-1250 MPa.
Preferably, the multidirectional forging step is as follows: in order to forge one or a plurality of steps along a plurality of directions of the titanium-based composite blank, matrix particles in the obtained titanium-based composite material are in an ellipsoid shape, a space structure formed by quasi-continuous whiskers distributed at the edge of the matrix is in an ellipsoid distribution, the ellipticity oblateness is 0.35-0.95, and the tensile strength of the obtained titanium-based composite material is 1150-1450 MPa.
Preferably, the volume ratio of the reinforcing body to the matrix is as follows: reinforcement: the base body = 0-15: 100-85.
Preferably, the forging temperature is 900-1250 ℃.
Preferably, the sintering temperature is 1000-1300 ℃, and the vacuum degree is secondary vacuum or is protected by inert gas; .
Preferably, the sintering pressure is pressureless or 15-50 MPa.
Compared with the prior art, the invention has the following beneficial effects:
(1) the technology realizes the non-uniform distribution regulation and control of the in-situ self-generated reinforcement of the titanium-based composite material. The large-size spherical titanium alloy powder is used as a raw material, the reinforcing body or raw material particles thereof are uniformly adhered to the surface of the large-size titanium alloy powder through ball milling and powder mixing, and then sintering, forging, extruding and other preparation processes are carried out, so that the TiB and/or TiC reinforcing body is in a toughening structure with non-uniform spatial distribution. Compared with the titanium-based composite material with uniformly distributed reinforcing bodies, the technology can solve the application bottleneck of high room temperature brittleness, and can improve the strength level and the service temperature of the titanium-based composite material.
(2) The forging processing technology is flexible and controllable, titanium-based composite materials with different whisker characteristics are prepared by designing reasonable forging parameters, and compared with extrusion and rolling deformation, multidirectional forging is easy to realize the design of blank plastic strain states (tensile strain, compressive strain and plane strain) through loading path and strain quantity control, so that the diversification of TiBw spatial distribution and orientation optimization are realized, and an effective adjusting means is provided for the distribution characteristics of a reinforcement body and the tissue characteristics of a matrix. And the non-uniform reinforced titanium-based composite material with the reinforcement distributed in different characteristics obtained by unidirectional or multidirectional forging often has more excellent comprehensive mechanical properties.
(3) The multidirectional forging process realizes severe plastic deformation through multi-pass continuous deformation, and combines reasonable control of deformation temperature, so that a fine-grained or even ultra-fine-grained matrix structure refining effect is easily obtained, and meanwhile, the existence of three-dimensional compressive stress is beneficial to plastic processing of brittle titanium-based composite materials and can be applied to various composite materials such as aluminum base, magnesium base, titanium base and the like. Detailed Description
Example 1
1) Preparation of preliminary mixed powder
TiB was milled by low energy ball milling2Adhering to the surface of TC4 to obtain TiB2The mass ratio of the amount of TC4 to the amount of TiB2TC4= 2: 98 of preliminary mixed powder; obtaining the titanium-based composite material with the volume ratio of TiB to TC4=3.5 to 96.5 through in-situ self-generated reaction in the subsequent sintering and forging processes; the primary average particle size of the TC4 particles was 40 μm.
Low-energy ball milling: a planetary ball mill, wherein the ball milling frequency is 25Hz, the ball milling time is 8 hours, and the ball material mass ratio is 5: 1;
2) preparation of composite blanks
Placing the preliminary mixed powder in stoneIn an ink mould, under the condition of secondary vacuum, the pressure is 25MPa, the ink mould is heated to 1200 ℃ within 2 hours, the heat preservation and pressure maintaining are carried out for 45min, the hot-pressing sintering is carried out, the pressure is released, the ink mould is cooled along with a furnace, and the in-situ reaction is carried out:
obtaining a TiB/TC4 composite blank;
3) one-way forging
Coating KOT-01 high-temperature oxidation resistant paint on the TiB/TC4 composite blank, and placing the TiB/TC4 composite blank into a 304 stainless steel container with a KOT-01 high-temperature oxidation resistant coating on the inner wall; heating to 1200 deg.C to obtain cylindrical blank with original size of 60mm × 55mm, maintaining the cylindrical blank with original size of 60mm × 55mm at 1200 deg.C to make the blank core reach the initial forging temperature,
unidirectional forging: respectively forging three times and six times along the height direction of the blank, and accumulating equivalent strain to 0.6 and 2.0;
cylindrical blanks with original dimensions of phi 60mm multiplied by 55mm are respectively forged into dimensions of phi 81.2mm multiplied by 30mm and phi 157.3mm multiplied by 8mm by the process.
Wherein, the space structure of the internal reinforcement is changed from r =40 μm sphere to the axial length ratio of 1: 1.8: 1.8 of round cake shape, the matrix structure is thinned to 20.5 mu m, the oblate ratio of an ellipsoid is 0.6, the size of the reinforcement is 2-4 mu m, the length-diameter ratio is 5-8, the tensile strength of the composite material reaches 1100MPa, and the elongation is 6.5%.
The space structure of an internal reinforcement is changed from a sphere with r =40 mu m into a round cake with the axial length ratio of 1:6.8:6.8 in a round cake forging blank with phi 157.3mm multiplied by 8mm, the matrix structure is thinned to 14.2 mu m, the oblateness of an ellipsoid is 0.9, the size of the reinforcement is 2-4 mu m, the length-diameter ratio of the reinforcement is 5-10, the tensile strength of the composite material reaches 1250MPa, and the elongation is 7.4%.
Example 2
1) Preparation of preliminary mixed powder
B was adhered to the surface of TA15 by low energy ball milling, where: the primary B/TA15 mixed powder with the dosage of B and TA15 in the mass ratio of B to TA15=1:99.08 is subjected to in-situ self-generation reaction in the subsequent hot forging process to obtain TiB to TA15=5:95 in the volume ratio, and the primary average particle size of TA15 particles is 120 mu m;
low-energy ball milling: a planetary ball mill, wherein the ball milling frequency is 25Hz, the ball milling time is 8 hours, and the ball material mass ratio is 5: 1;
2) preparation of composite blanks
Placing the preliminary mixed powder in a graphite die, heating to 1000 ℃ under the protection of inert gas under the pressure of 35MPa for 2 hours, keeping the temperature and the pressure for 45min, carrying out hot-pressing sintering, relieving pressure, cooling along with a furnace, and carrying out in-situ reaction:
obtaining a TiB/TA15 composite blank;
3) multidirectional forging
Coating the TiB/TA15 composite blank with KOT-01 high-temperature oxidation-resistant coating, and placing the coated blank into a low-carbon steel container with a KOT-01 high-temperature oxidation-resistant coating on the inner wall; heating to 1150 deg.C to obtain cubic blank with original size of 80mm × 80mm × 80 mm; in-situ reaction occurs:
preserving the heat of a cubic blank with the original size of 80mm multiplied by 80mm at 1050 ℃ to ensure that the core of the blank reaches the initial forging temperature;
multidirectional forging: 4-5 times of forging is carried out along the three directions of the length, the width and the height of the blank, and the single-time deformation amount is 20-45%;
by this process, a cylindrical billet of a cubic-shaped billet having original dimensions of 80mm × 80mm × 80mm was forged into rectangular billets having dimensions of 60 × 92.4 × 92.4mm and 250 mm × 45.3 mm × 45.3 mm, the cumulative equivalent strains were 2.1 and 2.7, respectively,
wherein, the space structure of the internal reinforcement is changed from a sphere of r =120 μm to a rectangular solid forging stock of 60 × 92.4 × 92.4mm, and the axial length ratio is 14: 5: 25, the matrix structure is thinned to 20.4 mu m, the oblate ratio of an ellipsoid is 0.4, the size of the reinforcement is 0.5-2 mu m, the length-diameter ratio of the reinforcement is 6-12, the tensile strength of the composite material reaches 1320MPa, and the elongation is 5.0%.
A rectangular parallelepiped forged blank of 250 mm × 45.3 mm × 45.3 mm, the internal reinforcement space structure also changed from a spherical shape of r =120 μm to an axial length ratio of 31: 6:6, the matrix structure is thinned to 18.5 mu m, the oblate ratio of the ellipsoid is 0.8, the size of the reinforcement is 0.5-2 mu m, the length-diameter ratio of the reinforcement is 6-12, the tensile strength of the composite material reaches 1380MPa, and the elongation is 6.2%.
Example 3
1) Preparation of preliminary mixed powder
B is prepared by low-energy ball milling4C adhered to the surface of TC4 to obtain B4The mass ratio of the C to the TC4 is B4The initial mixed powder of TC4=2.4:97.6 is subjected to subsequent deformation to obtain a composite material with the volume ratio of TiB + TiC to TC4 being 8:92, and the initial average particle size of TC4 particles is 80 μm;
low-energy ball milling: a planetary ball mill, wherein the ball milling frequency is 15Hz, the ball milling time is 8 hours, and the ball material mass ratio is 5: 1;
2) preparation of composite blanks
Placing the preliminary mixed powder in a sheath, placing the sheath in a press die, compacting the powder under a pressure of 200MPa to obtain B4C/TC4 composite powder blank;
3) multidirectional forging
B is to be4Coating KOT-01 high-temperature oxidation resistant paint on the C/TC4 composite blank, and placing the C/TC4 composite blank into a low-carbon steel container with a KOT-01 high-temperature oxidation resistant coating on the inner wall; heating to 1050 ℃, by in situ reaction:
、
obtaining a composite material cuboid blank with the original size of 120mm multiplied by 120 mm; the rectangular blank with the original size of 120mm multiplied by 120mm is insulated at 1300 ℃ to ensure that the core part of the blank reaches the initial forging temperature,
multidirectional forging: and 7-pass forging is carried out along the three directions of the length, the width and the height of the blank, and the single-pass deformation is 30-50%.
By this process, a rectangular parallelepiped billet having an original size of 120mm × 120mm × 120mm is forged into a rectangular parallelepiped billet having a size of 90mm × 100mm × 138.6mm, the cumulative equivalent strains are respectively 3.5, and the internal reinforcement space structure is also changed from a spherical shape of r =80 μm to an axial length ratio of 2: 2:3, the matrix structure is refined to 12.8 mu m, the oblate ratio of the ellipsoid is 0.4, the size of the reinforcement is 2-4 mu m, the length-diameter ratio of the reinforcement is 4-8, the tensile strength of the composite material reaches 1450MPa, and the elongation is 5.4%.
Example 4
1) Preparation of preliminary mixed powder
Adhering TiB to the surface of TC4 by low-energy ball milling to obtain TiB: the volume ratio of TC4 to the TiB/TC4 composite material mixed powder is 10: 90; the primary average particle size of the TC4 particles was 40 μm.
Low-energy ball milling: and (3) a planetary ball mill, wherein the ball milling frequency is 15Hz, the ball milling time is 8 hours, and the ball-material mass ratio is 5: 1.
2) Preparation of composite blanks
Placing the preliminary mixed powder in a sheath, placing the sheath in a press die, compacting the powder under the pressure of 200MPa to obtain a TiB/TC4 composite powder blank;
3) multidirectional forging
Coating the TiB/TC4 composite blank with KOT-01 high-temperature oxidation-resistant coating, and placing the coated blank into a low-carbon steel container with a KOT-01 high-temperature oxidation-resistant coating on the inner wall; heating to 1250 ℃ to obtain a cuboid blank with the original size of 110mm multiplied by 110 mm; the method comprises the steps of preserving heat of a rectangular blank with the original size of 110mm multiplied by 110mm to ensure that the center of the blank reaches the initial forging temperature,
multidirectional forging: 8-pass forging is carried out along the three directions of the length, the width and the height of the blank, and the single-pass deformation is 30-50%.
The process forges a rectangular blank with the original size of 110mm multiplied by 110mm into a rectangular forging blank with the size of 220mm multiplied by 200mm multiplied by 77.8mm, the accumulated equivalent strain is respectively 3.8, the space structure of the internal reinforcement is changed from a sphere with r =40 mu m into an ellipsoid with the axial length ratio of 20:18:7, the matrix structure is thinned to 14.4 mu m, the oblateness of the ellipsoid is 0.6, the size of the reinforcement is 1-3 mu m, the length-diameter ratio of the reinforcement is 4-10, the tensile strength of the composite material reaches 1390MPa, and the elongation is 5.0%.
Example 5
1) Preparation of preliminary mixed powder
B is prepared by low-energy ball milling4C is adhered toPure Ti surface to obtain B4The mass ratio of the C to the pure Ti is B4Mixed powder of C, Ti =7.5, 92.5, through in-situ self-generation reaction
Obtaining the volume ratio of the reinforcement body of B4C: Ti =10: 90; the pure Ti particles had an initial average particle size of 60 μm.
Low-energy ball milling: a planetary ball mill, wherein the ball milling frequency is 15Hz, the ball milling time is 8 hours, and the ball material mass ratio is 5: 1;
2) preparation of composite blanks
Placing the preliminary mixed powder in a graphite mold, heating to 1300 ℃ in a second-stage vacuum degree for 2 hours, keeping the temperature and the pressure at 15MPa for 45min, carrying out hot-pressing sintering, relieving the pressure and cooling along with a furnace to obtain a TiB + TiC/Ti composite blank;
3) multidirectional forging
Coating KOT-01 high-temperature oxidation resistant coating on the TiB + TiC/Ti composite blank, and placing the blank into a low-carbon steel container with a KOT-01 high-temperature oxidation resistant coating on the inner wall; heating to 900 ℃ to obtain a cuboid blank with the original size of 100mm multiplied by 100 mm; keeping the temperature of a cuboid blank with the original size of 100mm multiplied by 100mm at 1000 ℃ to ensure that the center of the blank reaches the initial forging temperature;
multidirectional forging: and (3) forging 10 times along the three directions of the length, the width and the height of the blank, wherein the single-pass deformation is 30-50%.
The process is used for forging the rectangular blank with the original size of 100mm multiplied by 100mm into a rectangular forging blank with the size of 50mm multiplied by 55.6mm multiplied by 360mm, the accumulated equivalent strain is respectively 4.8, the space structure of the internal reinforcement is changed from a sphere with r =60 mu m into an ellipsoid with the axial length ratio of 36:6:5, the matrix structure is thinned to 14 mu m, the oblateness of the ellipsoid is 0.8, the size of the reinforcement is 0.5-3 mu m, the length-diameter ratio of the reinforcement is 6-18, the tensile strength of the composite material reaches 1188MPa, and the elongation is 8.7%.
Example 6
1) Preparation of preliminary mixed powder
TiB was milled by low energy ball milling2Adhering to the surface of pure Ti to obtain TiB2And the mass ratio of the pure Ti dosage is 8.8:91.2, and further carrying out in-situ reaction to obtain a composite material with the volume ratio of TiB to Ti =15: 85; the average particle size of pure Ti was 40 μm.
Low-energy ball milling: and (3) a planetary ball mill, wherein the ball milling frequency is 15Hz, the ball milling time is 8 hours, and the ball-material mass ratio is 5: 1.
2) Preparation of composite blanks
And (3) placing the preliminary mixed powder in a graphite die, heating to 1150 ℃ for 2 hours under the condition of secondary vacuum, keeping the temperature and the pressure at 50MPa for 45min, carrying out hot-pressing sintering, relieving the pressure and cooling along with a furnace to obtain the TiB/Ti composite blank.
3) Multidirectional forging
Coating the TiB/TC4 composite blank with KOT-01 high-temperature oxidation-resistant coating, and placing the coated blank into a low-carbon steel container with a KOT-01 high-temperature oxidation-resistant coating on the inner wall; heating to 950 ℃ to obtain a cuboid blank with the original size of 120mm multiplied by 120 mm; keeping the temperature of a cuboid blank with the original size of 100mm multiplied by 100mm at 900 ℃ to ensure that the center of the blank reaches the initial forging temperature;
multidirectional forging: and 6-pass forging is carried out along the three directions of the length, the width and the height of the blank, and the single-pass deformation is 30-50%.
The process forges a rectangular blank with the original size of 100mm multiplied by 100mm into a rectangular forging blank with the size of 300mm multiplied by 144mm multiplied by 40mm, the accumulated equivalent strain is respectively 3.2, the space structure of an internal reinforcement is changed from a sphere with r =40 mu m into an ellipsoid with the axial length ratio of 25:12:3, the matrix structure is thinned to 9.5 mu m, the oblateness of the ellipsoid is 0.9, the size of the reinforcement is 0.5 to 2.5 mu m, the length-diameter ratio of the reinforcement is 8 to 20, the tensile strength of the composite material reaches 1202MPa, and the elongation is 7.7%.
Example 7
1) Preparation of preliminary mixed powder
TiB was milled by low energy ball milling2Adhered to the surface of TB8 to obtain TiB2And the mass ratio of the TB8 dosage is 1.5: 98.5, and further obtaining a composite material with the volume ratio of TiB to TB8 of TiB: TA15=2.0:98 in the sintering and forging processes to obtain TiB2The primary mixed powder of/TB 8; the average particle size of TB8 particles was 200. mu.m.
Low-energy ball milling: a planetary ball mill, wherein the ball milling frequency is 15Hz, the ball milling time is 8 hours, and the ball material mass ratio is 5: 1;
2) preparation of composite blanks
Placing the preliminary mixed powder in a graphite mould, heating to 1050 ℃ under the pressure of 50MPa for 2 hours under the condition of secondary vacuum, preserving heat and pressure for 45min, carrying out hot-pressing sintering, relieving pressure and cooling along with a furnace to obtain a TiB/TB8 composite blank;
3) multidirectional forging
Coating the TiB/TB8 composite blank with KOT-01 high-temperature oxidation-resistant coating, and placing the coated blank into a low-carbon steel container with a KOT-01 high-temperature oxidation-resistant coating on the inner wall; heating to 1000 ℃ to obtain a cuboid blank with the original size of 80mm multiplied by 80 mm; keeping the temperature of a cuboid blank with the original size of 80mm multiplied by 80mm to ensure that the center of the blank reaches the initial forging temperature;
multidirectional forging: 4-pass forging is carried out along the three directions of the length, the width and the height of the blank, and the single-pass deformation is 40-60%.
The process forges a rectangular blank with the original size of 100mm multiplied by 100mm into a rectangular forging blank with the size of 180mm multiplied by 100mm multiplied by 28.4mm, the accumulated equivalent strain is respectively 2.4, the space structure of an internal reinforcement body is changed from a sphere with r =200 mu m into an ellipsoid with the axial length ratio of 23:13:4, the matrix structure is thinned to 19.5 mu m, the oblateness of the ellipsoid is 0.8, the size of the reinforcement body is 0.5-2.5 mu m, the length-diameter ratio of the reinforcement body is 6-16, the tensile strength of the composite material reaches 1150MPa, and the elongation is 6.2%.
Claims (2)
1. A method for controlling whisker characteristics in a titanium-based composite material, comprising the steps of:
1) preparation of preliminary mixed powder
B is prepared by low-energy ball milling4C adhered to the surface of TC4 to obtain B4The mass ratio of the C to the TC4 is B4The initial mixed powder of TC 4-2.4: 97.6 is further subjected to subsequent deformation to obtain a composite material with the volume ratio of TiB + TiC to TC4 being 8:92, and the initial average particle size of TC4 particles is 80 microns;
low-energy ball milling: a planetary ball mill, wherein the ball milling frequency is 15Hz, the ball milling time is 8 hours, and the ball material mass ratio is 5: 1;
2) preparation of composite blanks
Placing the preliminary mixed powder in a sheath, placing the sheath in a press die, compacting the powder under a pressure of 200MPa to obtain B4C/TC4 composite powder blank;
3) multidirectional forging
B is to be4Coating KOT-01 high-temperature oxidation resistant paint on the C/TC4 composite blank, and placing the C/TC4 composite blank into a low-carbon steel container with a KOT-01 high-temperature oxidation resistant coating on the inner wall; heating to 1050 ℃, by in situ reaction: b is4C+3Ti＝2TiB2+TiC、TiB2Obtaining a composite material cuboid blank with the original size of 120mm multiplied by 2 TiB; the rectangular blank with the original size of 120mm multiplied by 120mm is insulated at 1300 ℃ to ensure that the core part of the blank reaches the initial forging temperature,
multidirectional forging: and 7-pass forging is carried out along the three directions of the length, the width and the height of the blank, and the single-pass deformation is 30-50%.
2. A method for controlling whisker characteristics in a titanium-based composite material, comprising the steps of:
1) preparation of preliminary mixed powder
Adhering TiB to the surface of TC4 by low-energy ball milling to obtain TiB: the volume ratio of TC4 to the TiB/TC4 composite material mixed powder is 10: 90; the primary average particle size of TC4 particles was 40 μm;
low-energy ball milling: a planetary ball mill, wherein the ball milling frequency is 15Hz, the ball milling time is 8 hours, and the ball material mass ratio is 5: 1;
2) preparation of composite blanks
Placing the preliminary mixed powder in a sheath, placing the sheath in a press die, compacting the powder under the pressure of 200MPa to obtain a TiB/TC4 composite powder blank;
3) multidirectional forging
Coating the TiB/TC4 composite blank with KOT-01 high-temperature oxidation-resistant coating, and placing the coated blank into a low-carbon steel container with a KOT-01 high-temperature oxidation-resistant coating on the inner wall; heating to 1250 ℃ to obtain a cuboid blank with the original size of 110mm multiplied by 110 mm; the method comprises the steps of preserving heat of a rectangular blank with the original size of 110mm multiplied by 110mm to ensure that the center of the blank reaches the initial forging temperature,
multidirectional forging: 8-pass forging is carried out along the three directions of the length, the width and the height of the blank, and the single-pass deformation is 30-50%.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008048343A2 (en) * | 2006-02-14 | 2008-04-24 | Dynamet Technology, Inc. | Homogeneous titanium tungsten alloys produced by powder metal technology |
| CN102304643A (en) * | 2011-09-16 | 2012-01-04 | 哈尔滨工业大学 | Method for preparing TiC and TiB hybrid reinforced Ti-Al-Sn-Zr-Mo-Si-based composite board |
| CN108342667A (en) * | 2017-01-22 | 2018-07-31 | 宝山钢铁股份有限公司 | A kind of titanium boride nano whisker enhancing titanium matrix composite and preparation method thereof |
-
2019
- 2019-05-15 CN CN201910402565.5A patent/CN110218957B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008048343A2 (en) * | 2006-02-14 | 2008-04-24 | Dynamet Technology, Inc. | Homogeneous titanium tungsten alloys produced by powder metal technology |
| CN102304643A (en) * | 2011-09-16 | 2012-01-04 | 哈尔滨工业大学 | Method for preparing TiC and TiB hybrid reinforced Ti-Al-Sn-Zr-Mo-Si-based composite board |
| CN108342667A (en) * | 2017-01-22 | 2018-07-31 | 宝山钢铁股份有限公司 | A kind of titanium boride nano whisker enhancing titanium matrix composite and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| Effect of multi-directional forging on the microstructure and mechanical properties of TiBw/TA15 composite with network architecture;Rui Zhang et al;《Materials and Design》;20170830;第134卷;1-7 * |
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