CN110835844A - Composite fiber cloth for forging of large press and preparation method and application thereof - Google Patents
Composite fiber cloth for forging of large press and preparation method and application thereof Download PDFInfo
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- CN110835844A CN110835844A CN201911133698.3A CN201911133698A CN110835844A CN 110835844 A CN110835844 A CN 110835844A CN 201911133698 A CN201911133698 A CN 201911133698A CN 110835844 A CN110835844 A CN 110835844A
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
- D06M11/73—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with carbon or compounds thereof
- D06M11/74—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with carbon or compounds thereof with carbon or graphite; with carbides; with graphitic acids or their salts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J13/00—Details of machines for forging, pressing, or hammering
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J13/00—Details of machines for forging, pressing, or hammering
- B21J13/02—Dies or mountings therefor
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M2200/00—Functionality of the treatment composition and/or properties imparted to the textile material
- D06M2200/30—Flame or heat resistance, fire retardancy properties
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Abstract
The invention relates to composite fiber cloth for forging of a large press, and a preparation method and application thereof, and belongs to the field of forming and forging of large forgings of presses. The composite fiber cloth for forging the large press is prepared by compounding basalt fiber cloth and graphite powder; wherein, the graphite powder is evenly attached to the two surfaces of the basalt fiber cloth. The composite fiber cloth for forging the large press, which is manufactured by the invention, has the characteristics of small friction coefficient, heat insulation, good lubricating effect, large compressive resistance, good flexibility and the like, and also has larger extensibility at high temperature.
Description
Technical Field
The invention relates to composite fiber cloth for forging of a large press, and a preparation method and application thereof, and belongs to the field of forming and forging of large forgings of presses.
Background
The largest 8-thousand-ton large die forging hydraulic press in the world is used in China in 2013 for double production. At present, 8 ten thousand-ton large press machines have undertaken the matched development tasks of heavy forgings of national key models such as 'C919 large airplane', 'large conveyer', 'engine', 'flue gas turbine' and the like in China. The born large-scale forging belongs to the alloy which is difficult to deform and has large deformation resistance, and is characterized in that the forging has large overall dimension and high quality requirement. The production of forgings directly faces two major problems: firstly, the forging has high forming difficulty due to large deformation resistance; secondly, the stress strain born by the die in unit area is large, so that the surface of a cavity is seriously deformed and failed after the forging die forges several to dozens of forging dies. The quality of the forgings and the service life of the die face great challenges, and the production and manufacturing cost and market competitiveness of the die forgings are seriously influenced. Therefore, finding a fiber cloth which is suitable for the production of a large press, can insulate heat, resist pressure, preserve heat, lubricate and is easy to remove becomes a problem to be solved urgently at present.
There are two types of insulation materials currently used on presses: one is fiber cloth and one is fiber blanket; there are two types of lubricating materials: one is oil-based graphite, one is water-based graphite; the four materials were used independently, each having disadvantages. The fiber cloth has poor ductility, is easy to crush and break, has poor fitting degree of the heat-insulating cotton and the surface of a forging piece, is difficult to arrange materials, is not environment-friendly, has limited adhesive force of graphite on a die, and has poor lubricating effect. Therefore, the research on the application of the novel composite fiber cloth with the combination of heat preservation and lubrication in the forging and forming process to the production of large-scale pressing machines to solve the problems of the forming of large-scale forgings and the abrasion and deformation of dies becomes the key problem which needs to be solved urgently at present.
Chinese patent No. 201711352339.8 discloses a cloth for forging which is made by compounding a fiber cloth and graphite, thereby providing the cloth for forging with heat-insulating and lubricating effects. In order to make the friction coefficient of the composite fiber cloth smaller, the invention selects the glass fiber cloth with small friction coefficient to be compounded with the graphite. However, because the affinity between graphite and glass fiber cloth is poor, after multiple times of forging, the graphite on the glass fiber cloth is easy to fall off, so that the lubrication is uneven, and the surface smoothness of a forged die is poor; in addition, the maximum graphite amount on the glass fiber cloth can only be 1mm, and if the graphite adhesion amount is further increased, the graphite is easy to fall off during forging, and the surface smoothness of the forged grinding tool is also influenced.
In order to further improve the quality of the forging and the service life of the die, the problem to be solved urgently is to prepare another fiber cloth with smaller friction coefficient and longer service life.
Disclosure of Invention
The invention provides a composite fiber cloth with a smaller friction coefficient.
The composite fiber cloth is prepared by compounding basalt fiber cloth and graphite powder; wherein, the graphite powder is evenly attached to the two surfaces of the basalt fiber cloth. Preferably, the weight of the graphite layers attached to both sides of the basalt fiber cloth is equal.
Preferably, the thickness of the basalt fiber cloth is 0.25-0.45 mm; more preferably, the thickness of the basalt fiber cloth layer is 0.34 mm.
Preferably, the weight of the attached graphite powder on each square meter of basalt fiber cloth is 110-150 g; preferably, the attached graphite powder weighs 150 grams.
Preferably, the elongation of the basalt fiber cloth is 12.8% -13.9%; more preferably, the basalt fiber cloth has an elongation of 13.63%.
Preferably, the elongation of the composite fiber cloth is 18.0% -18.9%, the heat conductivity coefficient of the composite fiber cloth is 0.015-0.02, and the friction coefficient of the composite fiber cloth is 0.165-0.19; more preferably, the composite fiber cloth has an elongation of 18.6% and a friction coefficient of 0.175.
The second technical problem to be solved by the invention is to provide a preparation method of the composite fiber cloth.
The preparation method of the composite fiber cloth comprises the following steps:
a. taking basalt fiber cloth and graphite powder; wherein the amount of the graphite powder is calculated according to the requirement of 110-150 g of graphite powder for each square meter of basalt fiber cloth;
b. b, adding water into the graphite powder obtained in the step a, and uniformly mixing to obtain a graphite emulsion; wherein the weight ratio of the graphite powder to the water is 1: 15-1: 20;
c. and (c) uniformly attaching the graphite emulsion prepared in the step (b) to the surface of the basalt fiber cloth in the step (a), and drying to obtain the composite fiber cloth.
Preferably, in the step c, the method for uniformly attaching the graphite emulsion to the surface of the basalt fiber cloth comprises the following steps: soaking the basalt fiber cloth in the graphite emulsion, and then taking out the basalt fiber cloth; or spraying the graphite emulsion on both sides of the basalt fiber cloth.
The invention also provides an application method of the composite fiber cloth.
The application of the composite fiber cloth, wherein the composite fiber cloth is used as fiber cloth for forging; preferably, the fiber cloth for forging is a forged fiber cloth for a large die forging hydraulic press or a forged fiber cloth for an oil press; the large die forging hydraulic machine is a large die forging hydraulic machine with the weight of more than 2 ten thousand tons; the nominal pressure of the oil press is more than or equal to 50 MN.
Preferably, the use method is as follows: and (3) laying the composite fiber cloth in the lower die cavity to ensure that the structural shape in the die cavity can be clearly distinguished, then putting the hot forging blank into the die cavity lined with the composite fiber cloth, and covering the composite fiber cloth on the upper surface of the forging blank for forging and forming.
The invention has the beneficial effects that:
1. the friction coefficient of the graphite composite basalt fiber cloth is smaller, and the graphite powder can be attached to the basalt fiber cloth more stably, so that the service life of the composite fiber cloth can be prolonged, and the quality of a forged piece and the service life of a die can be further prolonged.
2. The elongation percentage of the basalt fiber cloth is larger than that of the glass fiber cloth, so that the elongation percentage of the composite fiber cloth is larger than that of the graphite/glass fiber cloth composite cloth, the thickness of the prepared composite cloth is thinner, and the precision of a forging piece can be further improved.
3. The fiber cloth manufactured by the invention has the characteristics of good heat insulation and lubrication effects, large pressure resistance, good flexibility and the like, and also has larger extensibility at high temperature.
4. The researched novel composite fiber cloth is nontoxic, harmless and pollution-free to human bodies and environment in the manufacturing and using processes. After production and use, the cleaning is more convenient, and no dust is raised in the cleaning process.
5. Generally, glass fibers begin to soften at 650 ℃, basalt fibers have a higher softening point and begin to soften at 960 ℃. Under the general condition of below 1000 ℃, the basalt fiber can not be softened and adhered with other objects, and is easy to fall off, so the composite fiber cloth has the advantage of strong heat resistance.
Drawings
Fig. 1 is a schematic structural diagram of a composite fiber cloth: wherein, the graphite layer is 1-a basalt fiber layer, the basalt fiber layer is 2-a graphite layer;
FIG. 2 is a dimensional diagram of blank deformation during measurement of friction coefficient and elongation by Deform simulation software; wherein a-1 and a-2 are schematic diagrams of original blanks; b-1 is a schematic diagram of the blank deformed in the scheme 1; b-2 is a schematic diagram of the blank deformed in the scheme 2; c-1 is a top view of the deformed blank in the scheme 1, wherein x is the diameter of the outer ring in the first direction, y is the diameter of the outer ring in the second direction, the directions of x and y are mutually vertical, and z is the height of the deformed blank; c-2 is a top view of the deformed blank in the scheme 2, wherein x is the diameter of the outer ring in the first direction, y is the diameter of the outer ring in the second direction, the directions of x and y are mutually vertical, and z is the height of the deformed blank; d-1 is the front view of the blank deformed in the scheme 1, and Y is the diameter of the bottom of the blank; d-2 is the front view of the blank after the deformation of the scheme 2, and Y is the diameter of the bottom of the blank.
Detailed Description
The invention provides a composite fiber cloth for forging with a smaller friction coefficient.
The composite fiber cloth is prepared by compounding basalt fiber cloth and graphite powder; wherein, the graphite powder is evenly attached to the two surfaces of the basalt fiber cloth.
Preferably, the thickness of the basalt fiber cloth is 0.25-0.45 mm; more preferably, the thickness of the basalt fiber cloth layer is 0.34 mm.
Preferably, the weight of the attached graphite powder on each square meter of basalt fiber cloth is 110-150 g; the attached graphite is too much, so that the graphite is easy to fall off during forging, the thickness of the composite fiber cloth is influenced, and the size precision of the forging is reduced; the graphite is too little, and the lubrication degree of the composite fiber cloth is not enough. Preferably, the weight of the attached graphite powder is 150g, and when the weight of the graphite powder is 150g, the friction coefficient is minimum and the forging quality is not affected.
Preferably, the elongation of the basalt fiber cloth is 12.8% -13.9%; more preferably, the basalt fiber cloth has an elongation of 13.63%.
Preferably, the elongation of the composite fiber cloth is 18.0% -18.9%, the heat conductivity coefficient of the composite fiber cloth is 0.015-0.02, and the friction coefficient of the composite fiber cloth is 0.165-0.19; more preferably, the composite fiber cloth has an elongation of 18.6% and a friction coefficient of 0.175.
The second technical problem to be solved by the invention is to provide a preparation method of the composite fiber cloth.
The preparation method of the composite fiber cloth comprises the following steps:
a. taking basalt fiber cloth and graphite powder; wherein the amount of the graphite powder is calculated according to the requirement of 110-150 g of graphite powder for each square meter of basalt fiber cloth;
b. b, adding water into the graphite powder obtained in the step a, and uniformly mixing to obtain a graphite emulsion; wherein the weight ratio of the graphite powder to the water is 1: 15-1: 20; if the concentration of the graphite emulsion is too high, the adhesion is reduced, and the graphite is not easy to be uniformly coated on the surface of the fiber cloth; the concentration is too low, the graphite is not easy to coat on the surface of the fiber cloth, and the adhesion amount does not meet the requirement.
c. And (c) uniformly attaching the graphite emulsion prepared in the step (b) to the surface of the basalt fiber cloth in the step (a), and drying to obtain the composite fiber cloth.
Wherein the drying is any one of air drying, baking and sun drying.
Preferably, in the step c, the method for uniformly attaching the graphite emulsion to the surface of the basalt fiber cloth comprises the following steps: soaking the basalt fiber cloth in the graphite emulsion, and then taking out the basalt fiber cloth; or spraying the graphite emulsion on both sides of the basalt fiber cloth.
Preferably, the specific operation method comprises the following steps: soaking the prepared basalt fiber cloth in the graphite emulsion, then taking out the basalt fiber cloth, and then slightly rotating the basalt fiber cloth to ensure that the graphite is uniformly adhered to the basalt fiber cloth. And then clamping one end of the basalt fiber cloth to enable the basalt fiber cloth to be vertical to the horizontal plane, and airing the basalt fiber cloth with the graphite emulsion (preventing the basalt fiber cloth from shaking to cause uneven graphite adhesion in the airing process).
The invention also provides an application method of the composite fiber cloth.
The application of the composite fiber cloth, wherein the composite fiber cloth is used as fiber cloth for forging; preferably, the fiber cloth for forging is a forged fiber cloth for a large die forging hydraulic press or a forged fiber cloth for an oil press; the large die forging hydraulic machine is a large die forging hydraulic machine with the weight of more than 2 ten thousand tons; the nominal pressure of the oil press is more than or equal to 50 MN.
Preferably, the use method is as follows: and (3) laying the composite fiber cloth in the lower die cavity to ensure that the structural shape in the die cavity can be clearly distinguished, then putting the hot forging blank into the die cavity lined with the composite fiber cloth, and covering the composite fiber cloth on the upper surface of the forging blank for forging and forming.
The following examples are provided to further illustrate the embodiments of the present invention and are not intended to limit the scope of the present invention.
Example 1
Taking basalt fiber cloth, wherein the thickness of the basalt fiber cloth is 0.34mm, and the size of the basalt fiber cloth is based on 100 percent of the surface area of the covered die cavity; preparing graphite emulsion by adopting clear water and graphite, wherein the weight ratio of graphite powder to water is 1: 15; the prepared graphite emulsion is uniformly attached to two sides of basalt fiber cloth, so that the weight of the attached graphite powder is 150g per square meter of basalt fiber cloth; and drying in the sun to obtain the graphite composite basalt fiber cloth.
Comparative example 1
The same basalt fiber cloth as in example 1 was used.
Test example 1
The basalt fiber cloth of comparative example 1 and the graphite composite basalt fiber cloth of example 1 were tested for elongation and friction coefficient.
The test is carried out by adopting a steel square block high-temperature upsetting experiment, and basalt fiber cloth and graphite composite basalt fiber cloth are respectively padded on the steel square block, wherein the upsetting deformation is 14%. The experimental data obtained by the upset test are shown in table 1.
The method comprises the following steps of setting different friction coefficients by using Deform simulation software to repeatedly simulate the upsetting experiment, wherein the specific process of measuring the friction coefficients and the elongation by using the Deform simulation software is shown in the following table 1 and fig. 2; wherein, the scheme 1 refers to the test carried out by adopting the basalt fiber cloth of the comparative example 1; scheme 2 refers to the test performed using the graphite composite basalt fiber cloth of example 1.
TABLE 1
Finally, the friction coefficient of the basalt fiber cloth is 0.475, and the friction coefficient of the graphite composite basalt fiber cloth is 0.175, as shown in table 1. Therefore, the lubricating effect of the graphite composite basalt fiber cloth is very good. The elongation of the basalt fiber cloth is only 13.63% at the high temperature of 800 ℃, the elongation of the graphite composite basalt fiber cloth is 18.6%, the graphite composite basalt fiber cloth can be tightly attached to the surface of a forged piece in forging, and the graphite composite basalt fiber cloth can automatically adapt to the shape of the forged piece along with the deformation of the forged piece, so that the composite basalt fiber cloth has the characteristics of high pressure resistance and good flexibility.
Test example 2
The heat conductivity coefficient of the graphite composite basalt fiber cloth prepared in the embodiment 1 is tested, the heat conductivity coefficient of the basalt fiber is 0.031-0.038, and the heat conductivity coefficient of the graphite composite basalt fiber cloth is 0.015-0.02, so that the graphite composite basalt fiber cloth is poor in heat conductivity and has a good heat preservation effect.
Example 2
Taking basalt fiber cloth, wherein the thickness of the basalt fiber cloth is 0.34mm, and the size of the basalt fiber cloth is based on 100 percent of the surface area of the covered die cavity; preparing graphite emulsion by adopting clear water and graphite, wherein the weight ratio of graphite powder to water is 1: 15; the prepared graphite emulsion is uniformly attached to two sides of basalt fiber cloth, so that the weight of the attached graphite powder on each square meter of basalt fiber cloth is 130 g; and drying in the sun to obtain the graphite composite basalt fiber cloth.
Comparative example 2
Taking basalt fiber cloth, wherein the thickness of the basalt fiber cloth is 0.34mm, and the size of the basalt fiber cloth is based on 100 percent of the surface area of the covered die cavity; preparing graphite emulsion by adopting clear water and graphite, wherein the weight ratio of graphite powder to water is 1: 15; the prepared graphite emulsion is uniformly attached to two sides of basalt fiber cloth, so that the weight of the attached graphite powder is 160 g per square meter of basalt fiber cloth; and drying in the sun to obtain the graphite composite basalt fiber cloth.
Comparative example 3
Taking glass fiber cloth, wherein the thickness of the glass fiber cloth is 2mm, and the size is based on 100 percent of the surface area of a covered die cavity; preparing graphite emulsion by adopting clear water and graphite, wherein the weight ratio of graphite powder to water is 1: 15; uniformly attaching the prepared graphite emulsion to two surfaces of glass fiber cloth, wherein the weight of attached graphite powder is 130 g per square meter of glass fiber cloth; and drying in the sun to obtain the composite fiber cloth.
Comparative example 4
Taking glass fiber cloth, wherein the thickness of the glass fiber cloth is 2mm, and the size of the glass fiber cloth is based on that 100% of the glass fiber cloth completely covers the surface area of a mold cavity; preparing graphite emulsion by adopting clear water and graphite, wherein the weight ratio of graphite powder to water is 1: 15; uniformly attaching the prepared graphite emulsion to two surfaces of glass fiber cloth, wherein the weight of the attached graphite powder is 160 g per square meter of the glass fiber cloth; and drying in the sun to obtain the composite fiber cloth.
Test example 3
The friction coefficients of example 2 and comparative examples 2 to 4 measured by the test method of test example 1 are shown in table 2.
TABLE 2
| Example 2 | Comparative example 2 | Comparative example 3 | Comparative example 4 | |
| Coefficient of friction | 0.19 | 0.215 | 0.442 | 0.47 |
Test example 4
The composite fiber cloth prepared in the embodiments 1-2 and the comparative examples 2-4 is used for forging the outer cylinder of the landing gear of the airplane, namely a large forging with a special-shaped high-package complex structure, and the pressure in the forging process is 700MN and the underpressure is 8 mm.
The composite fiber cloths prepared in examples 1-2 and comparative examples 2-4 were respectively laid in the lower mold cavity to ensure that the structural shape in the mold cavity could be clearly distinguished. And then, putting the hot forging blank into a die cavity lined with composite fiber cloth, and covering novel composite fiber cloth on the upper surface of the forging blank for forging and forming.
After the forging is finished, the die cavities of the embodiments 1-2 and the comparative example 3 are smooth and clean; comparative examples 2 and 4 had poor mold finishes. The reason for the poor finish of the dies of comparative examples 2 and 4 is that the fiber cloth cannot carry such a large amount of graphite powder, and graphite falls off during the forging process, resulting in uneven distribution of graphite and poor finish of the dies.
After 5 times of repeated forging, the surface of the die of the embodiment 1 and the embodiment 2 is still smooth and fresh, and the filling and forming of the forge piece achieve the expected effect. The abrasion occurred in comparative example 3 because the graphite powder could be better loaded on the basalt fiber cloth, and after repeated forging for 5 times, the graphite powder on the glass fiber cloth began to fall off, causing the abrasion of the mold.
Claims (9)
1. The composite fiber cloth for forging the large press is characterized by being prepared by compounding basalt fiber cloth and graphite powder; the graphite powder is uniformly attached to the two surfaces of the basalt fiber cloth, and the weight of the graphite powder attached to the two surfaces of the basalt fiber cloth is equal; the weight of the graphite powder attached to each square meter of basalt fiber cloth is 110-150 g.
2. The large press forging composite fiber cloth according to claim 1, wherein the thickness of the basalt fiber cloth is 0.25-0.45 mm; the thickness of the basalt fiber cloth layer is preferably 0.34 mm.
3. The large press forging conjugate fiber cloth according to claim 1 or 2, wherein the weight of the graphite powder attached to each square meter of the basalt fiber cloth is 150 g.
4. The large press forging composite fiber cloth according to claim 1, wherein the elongation of the basalt fiber cloth is 12.8% -13.9%; preferably, the basalt fiber cloth has an elongation of 13.63%.
5. The composite fiber cloth for forging in a large press according to any one of claims 1 to 4, wherein the elongation of the composite fiber cloth is 18.0 to 18.9%, the thermal conductivity of the composite fiber cloth is 0.015 to 0.02, and the friction coefficient of the composite fiber cloth is 0.165 to 0.19; preferably, the composite fiber cloth has an elongation of 18.6% and a friction coefficient of 0.175.
6. The preparation method of the composite fiber cloth for forging the large press as recited in any one of claims 1 to 5, characterized by comprising the steps of:
a. taking basalt fiber cloth and graphite powder; wherein the amount of the graphite powder is calculated according to the requirement of 110-150 g of graphite powder for each square meter of basalt fiber cloth;
b. b, adding water into the graphite powder obtained in the step a, and uniformly mixing to obtain a graphite emulsion; wherein the weight ratio of the graphite powder to the water is 1: 15-1: 20;
c. and (c) uniformly attaching the graphite emulsion prepared in the step (b) to the surface of the basalt fiber cloth in the step (a), and drying to obtain the composite fiber cloth.
7. The method for preparing the composite fiber cloth for forging in the large press according to claim 6, wherein in the step c, the method for uniformly attaching the graphite emulsion on the surface of the basalt fiber cloth comprises the following steps: soaking the basalt fiber cloth in the graphite emulsion, and then taking out the basalt fiber cloth; or spraying the graphite emulsion on both sides of the basalt fiber cloth.
8. The use of the large press forging composite fiber cloth according to any one of claims 1 to 5, wherein the composite fiber cloth is used as a forging fiber cloth; preferably, the fiber cloth for forging is a forged fiber cloth for a large die forging hydraulic press or a forged fiber cloth for an oil press; the large die forging hydraulic machine is a large die forging hydraulic machine with the weight of more than 2 ten thousand tons; the nominal pressure of the oil press is more than or equal to 50 MN.
9. The application of the composite fiber cloth for forging the large press as recited in claim 8, is characterized in that the application method is as follows: and (3) laying the composite fiber cloth in the lower die cavity to ensure that the structural shape in the die cavity can be clearly distinguished, then putting the hot forging blank into the die cavity lined with the composite fiber cloth, and covering the composite fiber cloth on the upper surface of the forging blank for forging and forming.
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| CN111441177A (en) * | 2020-04-02 | 2020-07-24 | 四川万润海纳科技有限公司 | Graphite coating fiber cloth composite material and preparation method thereof |
| CN112893722A (en) * | 2021-01-15 | 2021-06-04 | 中国第二重型机械集团德阳万航模锻有限责任公司 | Rapid forming method for GH4720Li high-temperature alloy forging |
| CN113369428A (en) * | 2021-07-07 | 2021-09-10 | 中国航发北京航空材料研究院 | Preparation method of large-size TC17 titanium alloy beta-forged blisk forging |
| CN113500160A (en) * | 2021-08-06 | 2021-10-15 | 湖南大学 | Forging cloth capable of improving uniformity of titanium alloy surface structure and preparation method thereof |
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| CN111441177A (en) * | 2020-04-02 | 2020-07-24 | 四川万润海纳科技有限公司 | Graphite coating fiber cloth composite material and preparation method thereof |
| CN112893722A (en) * | 2021-01-15 | 2021-06-04 | 中国第二重型机械集团德阳万航模锻有限责任公司 | Rapid forming method for GH4720Li high-temperature alloy forging |
| CN112893722B (en) * | 2021-01-15 | 2023-02-10 | 中国第二重型机械集团德阳万航模锻有限责任公司 | Rapid forming method for GH4720Li high-temperature alloy forging |
| CN113369428A (en) * | 2021-07-07 | 2021-09-10 | 中国航发北京航空材料研究院 | Preparation method of large-size TC17 titanium alloy beta-forged blisk forging |
| CN113500160A (en) * | 2021-08-06 | 2021-10-15 | 湖南大学 | Forging cloth capable of improving uniformity of titanium alloy surface structure and preparation method thereof |
| CN113500160B (en) * | 2021-08-06 | 2022-07-19 | 湖南大学 | Forging cloth capable of improving uniformity of titanium alloy surface structure and preparation method thereof |
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