CN115700155A - Sheath and manufacturing method thereof - Google Patents
Sheath and manufacturing method thereof Download PDFInfo
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- CN115700155A CN115700155A CN202211394297.5A CN202211394297A CN115700155A CN 115700155 A CN115700155 A CN 115700155A CN 202211394297 A CN202211394297 A CN 202211394297A CN 115700155 A CN115700155 A CN 115700155A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The invention provides a sheath and a manufacturing method thereof, wherein the manufacturing method comprises the following steps: after the size of the sheath is determined by computer simulation, the titanium plate is sequentially punched, bent and welded to obtain a primary model sheath; carrying out dressing, sealing and welding and degassing processes on the initial model sheath to obtain a treatment sheath; and carrying out hot isostatic pressing treatment on the treatment sheath to obtain the sheath. The sheath provided by the invention is made of the titanium plate, so that the concave shrinkage of the sheath caused by using a low-carbon steel or stainless steel sheath is avoided, the shrinkage degree of the sheath and the internal powder is uniform, the sheath can be integrally shrunk, the product density is effectively improved, the internal structure of a titanium alloy special-shaped part formed by the sheath is more uniform, and the utilization efficiency of a titanium powder material is greatly improved.
Description
Technical Field
The invention belongs to the technical field of manufacturing of titanium alloy special-shaped parts, and relates to a sheath and a manufacturing method thereof.
Background
The capsule container is a closed container used for placing products, the hot isostatic pressing can be carried out only by vacuumizing the capsule to a certain vacuum degree after welding, and the expansion of the capsule can be caused by air leakage in the production process. Hot isostatic pressing is to place the product in a closed container, apply equal pressure to the product and high temperature, and under the action of high temperature and high pressure, the product is sintered and densified. Hot isostatic pressing of products generally needs to be performed in a capsule.
The sheath commonly used for the titanium alloy product at present is a low-carbon steel sheath, the low-carbon steel can generate interface reaction with the titanium alloy, the reaction is more severe at higher temperature, the sunken shrinkage can be generated generally, the surface of the titanium alloy formed by sintering is not flat, and the interface performance can be influenced, so that the sheath and the manufacturing method thereof need to be designed and developed, the defects of the prior art are overcome, and the requirement of industrial production is met.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the sheath and the manufacturing method thereof, the sheath provided by the invention is made of the titanium plate, the concave shrinkage of the sheath caused by using a low-carbon steel or stainless steel sheath is avoided, the shrinkage degree of the sheath and the internal powder is uniform, the sheath can be integrally shrunk, the product density is effectively improved, the internal structure of the titanium alloy special-shaped part formed by the sheath is more uniform, and the utilization efficiency of the titanium powder material is greatly improved.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the present invention provides a method of manufacturing a jacket, the method comprising:
(1) After the size of the sheath is determined by computer simulation, sequentially punching, bending and welding the titanium plate to obtain a primary model sheath;
(2) Performing dressing, sealing and welding and degassing processes on the initial model sheath in the step (1) to obtain a treatment sheath;
(3) And (3) performing hot isostatic pressing treatment on the treatment capsule in the step (2) to obtain the capsule.
The sheath provided by the invention is made of the titanium plate, so that the concave shrinkage of the sheath caused by using a low-carbon steel or stainless steel sheath is avoided, the shrinkage degree of the sheath and the internal powder is uniform, the sheath can be integrally shrunk, the product density is effectively improved, the internal structure of a titanium alloy special-shaped part formed by the sheath is more uniform, and the utilization efficiency of a titanium powder material is greatly improved.
As a preferred technical solution of the present invention, in the step (3), the sheath is machined to obtain the titanium alloy special-shaped piece.
As a preferable technical scheme of the invention, the titanium plate is a TA2 pure titanium plate.
The titanium plate is limited to be a TA2 pure titanium plate, and the sheath can be integrally shrunk only by matching the material with the specific manufacturing method, so that the product density is effectively improved, the internal structure of the titanium alloy special-shaped part formed by the sheath is more uniform, and the utilization efficiency of the titanium powder material is greatly improved.
In a preferred embodiment of the present invention, the pressing pressure is 0.5 to 1.5t, and may be, for example, 0.5t, 0.6t, 0.7t, 0.8t, 0.9t, 1t, 1.1t, 1.2t, 1.3t, 1.4t, or 1.5t, but is not limited to the above-mentioned values, and other values not listed in the above-mentioned range of values are also applicable.
Preferably, the temperature of the welding is 110 to 130 ℃, for example, 110 ℃, 112 ℃, 114 ℃, 116 ℃, 118 ℃, 120 ℃, 122 ℃, 124 ℃, 126 ℃, 128 ℃ and 130 ℃, but is not limited to the recited values, and other values not recited in the range of the values are also applicable.
As a preferred technical solution of the present invention, an decorating port is reserved at the top of the primary model jacket, and the decorating and sealing of the primary model jacket specifically includes:
the powder is filled from the powder filling port of the primary model sheath, the powder is vibrated once when the powder is filled for each time to fix the quality, the operation is repeated until the powder in the primary model sheath is a certain distance away from the powder filling port, and the degassing pipe is welded while the powder filling port is packaged.
In a preferred embodiment of the present invention, the fixed mass of powder per charge is 5 to 6kg, and may be, for example, 5kg, 5.1kg, 5.2kg, 5.3kg, 5.4kg, 5.5kg, 5.6kg, 5.7kg, 5.8kg, 5.9kg, or 6kg, but is not limited to the above-mentioned values, and other values not listed in the above-mentioned range are also applicable.
Preferably, the certain distance is 1 to 2mm, and may be, for example, 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2mm, but is not limited to the recited values, and other values not recited within the range of values are also applicable.
Preferably, the decorating opening is sealed and welded after being covered by a gasket, graphite paper and a titanium net.
Preferably, the degassing pipe is a pure titanium pipe.
The invention limits the degassing pipe to be a pure titanium pipe because the degassing pipe is made of the same material as the sheath, thereby ensuring the sheath and the degassing pipe to be welded firmly.
As a preferred technical solution of the present invention, the degassing process specifically includes:
and degassing the products subjected to the initial model sheathing assembly and sealing welding, wherein the degassing condition is that the products are subjected to degassing, heating and heat preservation, reheating, cooling and gas sealing operations at normal temperature in sequence to obtain a treatment sheathing.
In a preferred embodiment of the present invention, the temperature of the deaeration at normal temperature is 25 to 35 ℃ and may be, for example, 25 ℃, 26 ℃, 27 ℃, 28 ℃, 29 ℃, 30 ℃, 31 ℃, 32 ℃, 33 ℃, 34 ℃ or 35 ℃, but is not limited to the above-mentioned values, and other values not shown in the above-mentioned range of values are also applicable.
Preferably, the vacuum degree of the product after being degassed at normal temperature is less than or equal to 8 multiplied by 10 -3 Pa, for example, may be 8X 10 -3 Pa、7×10 -3 Pa、6×10 -3 Pa、5×10 -3 Pa, but is not limited to the recited values, and other values within the range are equally applicable.
Preferably, the final temperature of the heat-holding process is 100 to 110 ℃, for example, 100 ℃, 101 ℃, 102 ℃, 103 ℃, 104 ℃, 105 ℃, 106 ℃, 107 ℃, 108 ℃, 109 ℃ and 110 ℃, but is not limited to the values listed, and other values not listed in the range of the values are also applicable.
Preferably, the holding time of the heat holding process is 2 to 2.5 hours, for example, 2 hours, 2.1 hours, 2.2 hours, 2.3 hours, 2.4 hours, 2.5 hours, but not limited to the values listed, and other values not listed in the range of the values are also applicable.
In a preferred embodiment of the present invention, the final temperature of the reheating step is 550 to 560 ℃, and may be, for example, 550 ℃, 551 ℃, 552 ℃, 553 ℃, 554 ℃, 555 ℃, 556 ℃, 557 ℃, 558 ℃, 559 ℃ and 560 ℃, but is not limited to the above-mentioned values, and other values not listed in the above-mentioned range are also applicable.
Preferably, the vacuum degree of the product after the reheating process is less than or equal to 3 x 10 -3 Pa, for example, may be 3X 10 -3 Pa、2.9×10 -3 Pa、2×10 -3 Pa、1×10 -3 Pa, but is not limited to the recited values, and other values within the range are equally applicable.
Preferably, the reheating process has a heating rate of 5 to 6 ℃/min, for example, 5 ℃/min, 5.1 ℃/min, 5.2 ℃/min, 5.3 ℃/min, 5.4 ℃/min, 5.5 ℃/min, 5.6 ℃/min, 5.7 ℃/min, 5.8 ℃/min, 5.9 ℃/min, 6 ℃/min, but is not limited to the recited values, and other values not recited within the range of values are also applicable.
The degassing process and the specific operating parameters thereof are limited in the invention because the requirement of the vacuum degree of the sheath and the oxygen element content of the product are ensured, but the vacuum degree in the sheath is difficult to meet the requirement and the oxygen element content of the product is increased if the degassing process is not specifically limited in the invention.
In a preferred embodiment of the present invention, the hot isostatic pressing temperature is 1100 to 1400 ℃, and may be 1100 ℃, 1120 ℃, 1150 ℃, 1180 ℃, 1200 ℃, 1250 ℃, 1300 ℃, 1330 ℃, 1350 ℃, 1380 ℃ and 1400 ℃, for example, but is not limited to the values listed, and other values not listed in the range of values are also applicable.
Preferably, the hot isostatic pressing treatment is performed at a temperature increase rate of 3 to 5 ℃/min, for example, 3 ℃/min, 3.2 ℃/min, 3.4 ℃/min, 3.6 ℃/min, 3.8 ℃/min, 4 ℃/min, 4.2 ℃/min, 4.4 ℃/min, 4.6 ℃/min, 4.8 ℃/min, 5 ℃/min, but not limited to the values listed, and other values not listed within the range of values are also applicable.
Preferably, the holding pressure time of the hot isostatic pressing treatment is 2 to 3 hours, for example, 2 hours, 2.1 hours, 2.2 hours, 2.3 hours, 2.4 hours, 2.5 hours, 2.6 hours, 2.7 hours, 2.8 hours, 2.9 hours, and 3 hours, but is not limited to the recited values, and other values not recited in the range of the values are also applicable.
The hot isostatic pressing process and the specific operating parameters thereof are defined in the present invention because it is necessary to ensure the grain size of the titanium alloy, which would otherwise result in abnormal grain size of the titanium alloy.
The sheath prepared by the manufacturing method provided by the invention is used in the field of hot isostatic pressing of titanium alloy target materials and titanium alloy powder so as to form titanium alloy special-shaped pieces.
The recitation of numerical ranges herein includes not only the above-recited numerical values, but also any numerical values between non-recited numerical ranges, and is not intended to be exhaustive or to limit the invention to the precise numerical values encompassed within the range for brevity and clarity.
Compared with the prior art, the invention has the following beneficial effects:
the sheath provided by the invention is made of the titanium plate, so that the concave shrinkage of the sheath caused by using a low-carbon steel or stainless steel sheath is avoided, the shrinkage degree of the sheath and the internal powder is uniform, the sheath can be integrally shrunk, the product density is effectively improved, the internal structure of a titanium alloy special-shaped part formed by the sheath is more uniform, and the utilization efficiency of a titanium powder material is greatly improved.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments.
In one embodiment, the present invention provides a method of manufacturing a capsule, the method comprising:
(1) After the size of the sheath is determined by computer simulation, the titanium plate is sequentially punched, bent and welded to obtain a primary model sheath;
(2) Performing assembly, sealing and welding and degassing processes on the initial model sheath in the step (1) to obtain a treatment sheath;
(3) And (3) carrying out hot isostatic pressing treatment on the treatment sheath obtained in the step (2) to obtain the sheath.
The sheath provided by the invention is made of the titanium plate, so that the concave shrinkage of the sheath caused by using a low-carbon steel or stainless steel sheath is avoided, the shrinkage degree of the sheath and the internal powder is uniform, the sheath can shrink integrally, the density of the product is effectively improved, the internal structure of a titanium alloy special-shaped part formed by the sheath is more uniform, and the utilization efficiency of a titanium powder material is greatly improved.
Further, in the step (3), the sheath is machined to obtain the titanium alloy special-shaped piece.
Further, the titanium plate is a TA2 pure titanium plate. The titanium plate is limited to be a TA2 pure titanium plate, and the sheath can be integrally shrunk only by matching the material with the specific manufacturing method disclosed by the invention, so that the density of the product is effectively improved, the internal structure of the titanium alloy special-shaped part formed by the sheath is more uniform, and the utilization efficiency of the titanium powder material is greatly improved.
Furthermore, the stamping pressure is 0.5-1.5 t, and the welding temperature is 110-130 ℃.
The top reservation of the initial model canning has the mouth of decorating, and the initial model canning is decorated and is sealed welded and specifically includes:
the powder is filled from the powder filling port of the primary model sheath, the powder with the fixed mass is vibrated once every time, the operation is repeated, and the powder filling port is packaged until the powder in the primary model sheath is at a certain distance away from the powder filling port, and a degassing pipe is welded.
The fixed mass of powder per charge of powder is 5 to 6kg, and may be, for example, 5kg, 5.1kg, 5.2kg, 5.3kg, 5.4kg, 5.5kg, 5.6kg, 5.7kg, 5.8kg, 5.9kg, or 6kg, but is not limited to the values listed, and other values not listed in the numerical range are also applicable.
The distance is 1 to 2mm, and may be, for example, 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, or 2mm, but is not limited to the values listed, and other values not listed in the numerical range are also applicable.
And the decorating port is packaged, a gasket, graphite paper and a titanium net are adopted for covering, then sealing welding is carried out, and the degassing pipe is a pure titanium pipe. The invention limits the degassing pipe to be a pure titanium pipe because the degassing pipe is made of the same material as the sheath, thereby ensuring the sheath and the degassing pipe to be welded firmly.
The degassing process specifically comprises:
and degassing the products subjected to the initial model sheathing assembly and sealing welding, wherein the degassing condition is that the products are subjected to degassing, heating and heat preservation, reheating, cooling and gas sealing operations at normal temperature in sequence to obtain a treatment sheathing. The temperature of the degassing at room temperature is 25 to 35 ℃, for example, 25 ℃, 26 ℃, 27 ℃, 28 ℃, 29 ℃, 30 ℃, 31 ℃, 32 ℃, 33 ℃, 34 ℃, 35 ℃, but is not limited to the values listed, and other values not listed in the range of the values are also applicable. The vacuum degree of the product degassed at normal temperature is less than or equal to 8 multiplied by 10 -3 Pa, for example, may be 8X 10 -3 Pa、7×10 -3 Pa、6×10 -3 Pa、5×10 -3 Pa, but is not limited to the recited values, and other values within the range are equally applicable.
The final temperature of the heat-retaining step is 100 to 110 ℃ and may be, for example, 100 ℃, 101 ℃, 102 ℃, 103 ℃, 104 ℃, 105 ℃, 106 ℃, 107 ℃, 108 ℃, 109 ℃ and 110 ℃, but is not limited to the values listed, and other values not listed in the range of the values are also applicable. The holding time in the heat holding step is 2 to 2.5 hours, and may be, for example, 2 hours, 2.1 hours, 2.2 hours, 2.3 hours, 2.4 hours, or 2.5 hours, but is not limited to the values listed, and other values not listed in the range of the values are also applicable.
The final temperature of the reheating step is 550 to 560 ℃ and may be, for example, 550 ℃, 551 ℃, 552 ℃, 553 ℃, 554 ℃, 555 ℃, 556 ℃, 557 ℃, 558 ℃, 559 ℃ and 560 ℃, but is not limited to the values listed, and other values not listed in the range of the values are also applicable. The vacuum degree of the product after reheating process is less than or equal to 3 multiplied by 10 -3 Pa, for example, may be 3X 10 - 3 Pa、2.9×10 -3 Pa、2×10 -3 Pa、1×10 -3 Pa, but is not limited to the recited values, and other unrecited values within the range of values are equally applicable. The heating rate in the reheating step is 5 to 6 ℃/min, and examples thereof include 5 ℃/min, 5.1 ℃/min, 5.2 ℃/min, 5.3 ℃/min, 5.4 ℃/min, 5.5 ℃/min, 5.6 ℃/min, 5.7 ℃/min, 5.8 ℃/min, 5.9 ℃/min, and 6 ℃/min, but are not limited to the values listed, and other values not listed in the range of the values are also applicable.
The hot isostatic pressing temperature is 1100 to 1400 ℃, and may be 1100 ℃, 1120 ℃, 1150 ℃, 1180 ℃, 1200 ℃, 1250 ℃, 1300 ℃, 1330 ℃, 1350 ℃, 1380 ℃ and 1400 ℃, for example, but is not limited to the values listed, and other values not listed in the numerical range are also applicable. The rate of temperature rise in the hot isostatic pressing treatment is 3 to 5 ℃/min, and examples thereof include 3 ℃/min, 3.2 ℃/min, 3.4 ℃/min, 3.6 ℃/min, 3.8 ℃/min, 4 ℃/min, 4.2 ℃/min, 4.4 ℃/min, 4.6 ℃/min, 4.8 ℃/min, and 5 ℃/min, but the temperature rise is not limited to the values listed, and other values not listed in the range of values are also applicable. The holding time and pressure for the hot isostatic pressing treatment is 2 to 3 hours, and may be, for example, 2 hours, 2.1 hours, 2.2 hours, 2.3 hours, 2.4 hours, 2.5 hours, 2.6 hours, 2.7 hours, 2.8 hours, 2.9 hours, or 3 hours, but is not limited to the values listed, and other values not listed in the range of the values are also applicable.
Example 1
The embodiment provides a method for manufacturing a jacket, which specifically comprises the following steps:
(1) After the size of the sheath is determined by computer simulation, the titanium plate is sequentially punched, bent and welded to obtain a primary model sheath;
(2) Performing assembly, sealing and welding and degassing processes on the initial model sheath in the step (1) to obtain a treatment sheath;
(3) And (3) carrying out hot isostatic pressing treatment on the treatment sheath obtained in the step (2) to obtain the sheath.
Further, in the step (3), the sheath is machined to obtain the titanium alloy special-shaped piece.
Furthermore, the titanium plate is a TA2 pure titanium plate, the stamping pressure is 0.5t, and the welding temperature is 110 ℃.
The top reservation of the initial model canning has the mouth of decorating, and the initial model canning is decorated and is sealed welded and specifically includes:
the powder is filled from the powder filling port of the primary model sheath, the powder is vibrated once when the powder is filled for each time to fix the quality, the operation is repeated until the powder in the primary model sheath is a certain distance away from the powder filling port, and the degassing pipe is welded while the powder filling port is packaged. Every powder charge is 5kg of powder with fixed mass, the certain distance is 1mm, a dressing opening is packaged, a gasket, graphite paper and a titanium net are adopted for covering, sealing and welding are carried out, and a degassing pipe is a pure titanium pipe.
The degassing process specifically comprises: degassing the products subjected to the initial model wrapping, dressing and sealing welding, wherein the degassing condition is that the products are subjected to degassing, heating and heat preservation, reheating, cooling and gas sealing operation at normal temperature in sequence to obtain a treatment wrapping. Degassing at 25 deg.C, and degassing to obtain product with vacuum degree of 8 × 10 -3 Pa, the final temperature of the heating and heat preservation process is 110 ℃, the heat preservation time of the heating and heat preservation process is 2h, the final temperature of the reheating process is 550 ℃, and the vacuum degree of the product after the reheating process is 3 multiplied by 10 -3 Pa, and the heating rate in the reheating process is 5 ℃/min.
The temperature of the hot isostatic pressing treatment is 1100 ℃, the heating rate of the hot isostatic pressing treatment is 3 ℃/min, and the heat preservation and pressure maintaining time of the hot isostatic pressing treatment is 2h.
Example 2
The embodiment provides a method for manufacturing a jacket, which specifically comprises the following steps:
(1) After the size of the sheath is determined by computer simulation, the titanium plate is sequentially punched, bent and welded to obtain a primary model sheath;
(2) Performing assembly, sealing and welding and degassing processes on the initial model sheath in the step (1) to obtain a treatment sheath;
(3) And (3) carrying out hot isostatic pressing treatment on the treatment sheath obtained in the step (2) to obtain the sheath.
Further, in the step (3), the sheath is machined to obtain the titanium alloy special-shaped piece.
Further, the titanium plate is a TA2 pure titanium plate, the stamping pressure is 1t, and the welding temperature is 120 ℃.
The top of primary model canning is reserved has the mouth of decorating, and the primary model canning is decorated and is sealed the welding and specifically include:
the powder is filled from the powder filling port of the primary model sheath, the powder with the fixed mass is vibrated once every time, the operation is repeated, and after the powder in the primary model sheath is at a certain distance from the powder filling port, the degassing pipe is welded while the powder filling port is packaged. Each package of powder has a fixed mass of 5.5kg and a certain distance of 1.5mm, a dressing opening is packaged, covered by a gasket, graphite paper and a titanium net and then sealed and welded, and a degassing pipe is a pure titanium pipe.
The degassing process specifically comprises: degassing the products subjected to the decorating, sealing and welding of the initial model sheath, wherein the degassing condition is that the products are sequentially subjected to degassing at normal temperature, heating and heat preservation, reheating, cooling and gas sealing to obtain a treatment sheath. The degassing temperature at normal temperature is 30 ℃, and the vacuum degree of the product after degassing at normal temperature is 6 multiplied by 10 -3 Pa, the final temperature of the heating and heat-preserving process is 105 ℃, the heat-preserving time of the heating and heat-preserving process is 2.2h, the final temperature of the reheating process is 555 ℃, and the vacuum degree of the product after the reheating process is 2 multiplied by 10 -3 Pa, and the heating rate in the reheating process is 5.5 ℃/min.
The temperature of the hot isostatic pressing treatment is 1250 ℃, the heating rate of the hot isostatic pressing treatment is 4 ℃/min, and the heat preservation and pressure maintaining time of the hot isostatic pressing treatment is 2.5h.
Example 3
The embodiment provides a method for manufacturing a jacket, which specifically comprises the following steps:
(1) After the size of the sheath is determined by computer simulation, the titanium plate is sequentially punched, bent and welded to obtain a primary model sheath;
(2) Performing dressing, sealing and welding and degassing processes on the initial model sheath in the step (1) to obtain a treatment sheath;
(3) And (3) carrying out hot isostatic pressing treatment on the treatment sheath obtained in the step (2) to obtain the sheath.
Further, in the step (3), the sheath is machined to obtain the titanium alloy special-shaped piece.
Further, the titanium plate was a TA2 pure titanium plate, the pressing pressure was 1.5t, and the welding temperature was 130 ℃.
The top of primary model canning is reserved has the mouth of decorating, and the primary model canning is decorated and is sealed the welding and specifically include:
the powder is filled from the powder filling port of the primary model sheath, the powder with the fixed mass is vibrated once every time, the operation is repeated, and after the powder in the primary model sheath is at a certain distance from the powder filling port, the degassing pipe is welded while the powder filling port is packaged. Every powder charge is 6kg of powder with fixed mass, the certain distance is 2mm, a dressing opening is packaged, a gasket, graphite paper and a titanium net are adopted for covering, sealing and welding are carried out, and a degassing pipe is a pure titanium pipe.
The degassing process specifically comprises: degassing the products subjected to the decorating, sealing and welding of the initial model sheath, wherein the degassing condition is that the products are sequentially subjected to degassing at normal temperature, heating and heat preservation, reheating, cooling and gas sealing to obtain a treatment sheath. The degassing temperature at normal temperature is 35 ℃, and the vacuum degree of the product after degassing at normal temperature is 4 multiplied by 10 -3 Pa, the final temperature of the heating and heat-preserving process is 100 ℃, the heat-preserving time of the heating and heat-preserving process is 2.5h, the final temperature of the reheating process is 560 ℃, and the vacuum degree of the product after the reheating process is 2 multiplied by 10 -3 Pa, and the heating rate in the reheating process is 6 ℃/min.
The temperature of hot isostatic pressing treatment is 1400 ℃, the heating rate of hot isostatic pressing treatment is 5 ℃/min, and the heat preservation and pressure maintaining time of hot isostatic pressing treatment is 3h.
Example 4
This example provides a method for producing a jacket, which is different from example 1 in that the final temperature of the heat-insulating process is 95 ℃, and other parameters and methods are the same as those of example 1.
Example 5
This example provides a method for producing a jacket, which is different from example 1 in that the final temperature of the heat-insulating process was 115 ℃, and other parameters and methods were the same as those of example 1.
Example 6
The embodiment provides a method for manufacturing a sheath, which is different from the embodiment 1 in that the heat preservation time in the heating and heat preservation process is 1.8h, and other parameters and methods are the same as those in the embodiment 1.
Example 7
The embodiment provides a method for manufacturing a sheath, which is different from the embodiment 1 in that the heat preservation time in the heating and heat preservation process is 2.6h, and other parameters and methods are the same as those in the embodiment 1.
Example 8
This example provides a method of manufacturing a capsule in which, unlike example 1, the hot isostatic pressing treatment temperature was 1000 ℃, and other parameters and methods were the same as those of example 1.
Example 9
This example provides a method of making a capsule in which the hot isostatic pressing treatment temperature was 1450 ℃, unlike example 1, and the other parameters and methods were the same as example 1.
Example 10
This example provides a method of producing a capsule in which the hot isostatic pressing treatment was carried out for a dwell time of 1.8 hours, which is different from that of example 1, and the other parameters and methods were the same as those of example 1.
Example 11
This example provides a method of producing a capsule, in which the holding time and pressure retention time of the hot isostatic pressing treatment was 3.2 hours, which is different from example 1, and other parameters and methods were the same as those of example 1.
Comparative example 1
The comparative example provides a method for manufacturing a sheath, wherein a stainless steel plate is sequentially punched, bent and welded to obtain an initial model sheath, and other parameters and methods are the same as those of the sheath in example 1.
Comparative example 2
The comparative example provides a method for manufacturing a sheath, wherein a copper plate is sequentially punched, bent and welded to obtain a primary model sheath, and other parameters and methods are the same as those of the sheath in example 1, which is different from those of example 1.
The density test, specifically, the density measurement using the drainage method on a small sample, which is well known to those skilled in the art, was performed on the jacket obtained in the above example, and the test results are shown in table 1 below:
TABLE 1
| Examples | Product compactness |
| Example 1 | 98.2％ |
| Example 2 | 98.9％ |
| Example 3 | 99.4％ |
| Example 4 | 97.8％ |
| Example 5 | 98.1％ |
| Example 6 | 98.0％ |
| Example 7 | 98.1％ |
| Example 8 | 96.7％ |
| Example 9 | 97.3％ |
| Example 10 | 96.3％ |
| Example 11 | 97.3％ |
| Comparative example 1 | 95.3％ |
| Comparative example 2 | 96.1％ |
From table 1 above, it can be seen that:
according to the comparison results of the examples 1 to 3 and the examples 4 and 5, the final temperature of the heating and heat preservation process is limited to 100-110 ℃, so that water vapor in the sheath is completely removed, and if the final temperature is not within the limited range of the application, the water vapor residue in the sheath can influence the density of the product.
According to the comparison results of the examples 1-3 and the examples 6 and 7, the heat preservation time of the heating and heat preservation process is limited to 2-2.5 hours, so that the effect of removing water vapor from the sheath is good.
According to the comparison results of the examples 1-3 and the examples 8 and 9, the temperature of the hot isostatic pressing treatment is limited to be 1100-1400 ℃, so that the compactness of the sheath is good, the reduction of the compactness of the product cannot reach the standard below the given temperature, and the grain growth of the product cannot meet the requirement above the given temperature.
From the comparison results of examples 1-3 and examples 10 and 11, it can be seen that the hot isostatic pressing treatment is limited to 2-3 h, so that the product is dense, and if the hot isostatic pressing treatment is not within the limited range of the application, the product density is not satisfactory because sufficient hot holding time is required to mold the product.
According to the comparison results of the examples 1-3 and the comparative examples 1 and 2, the application limits the use of the titanium plate, so that the sheath can shrink in an all-around equal proportion, and if the titanium plate is not used, the sheath can be subjected to abnormal phenomena such as dent, crack, bulge and the like, because the sheath material and the internal product have different shrinkage performances.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
The present invention is illustrated in detail by the examples, but the present invention is not limited to the details, i.e., it is not meant to imply that the present invention must be practiced by the details. It should be understood by those skilled in the art that any modifications of the present invention, equivalent substitutions of the raw materials of the product of the present invention, and the addition of auxiliary components, selection of specific modes, etc., are within the scope and disclosure of the present invention.
Claims (10)
1. A method of making a jacket, comprising:
(1) After the size of the sheath is determined by computer simulation, the titanium plate is sequentially punched, bent and welded to obtain a primary model sheath;
(2) Performing dressing, sealing and welding and degassing processes on the initial model sheath in the step (1) to obtain a treatment sheath;
(3) And (3) carrying out hot isostatic pressing treatment on the treatment sheath obtained in the step (2) to obtain the sheath.
2. The manufacturing method according to claim 1, characterized in that in step (3), the capsule is machined to obtain a titanium alloy profile.
3. The manufacturing method according to claim 1 or 2, wherein the titanium plate is a TA2 pure titanium plate.
4. A manufacturing method according to any one of claims 1 to 3, characterized in that the pressing pressure is 0.5 to 1.5t.
Preferably, the temperature of the welding is 110 to 130 ℃.
5. The manufacturing method according to any one of claims 1 to 4, wherein a dressing opening is reserved at the top of the prototype jacket, and the dressing and sealing of the prototype jacket specifically comprises:
the powder is filled from the powder filling port of the primary model sheath, the powder is vibrated once when the powder is filled for each time to fix the quality, the operation is repeated until the powder in the primary model sheath is a certain distance away from the powder filling port, and the degassing pipe is welded while the powder filling port is packaged.
6. The manufacturing method according to claim 5, wherein the fixed mass of powder per charge is 5 to 6kg;
preferably, the certain distance is 1-2 mm;
preferably, the decorating opening is packaged, covered by a gasket, graphite paper and a titanium net and then sealed and welded;
preferably, the degassing pipe is a pure titanium pipe.
7. The manufacturing method according to any one of claims 1 to 6, characterized in that the degassing process comprises in particular:
and degassing the products subjected to the decorating and sealing welding of the initial model sheath, wherein the degassing condition is that the products are sequentially subjected to degassing at normal temperature, heating and heat preservation, reheating, cooling and gas sealing operations to obtain a treatment sheath.
8. The method for manufacturing a resin composition according to claim 7, wherein the temperature for degassing at normal temperature is 25 to 35 ℃;
preferably, the vacuum degree of the product degassed at normal temperature is less than or equal to 8 x 10 -3 Pa；
Preferably, the final temperature of the heating and heat preservation process is 100-110 ℃;
preferably, the heat preservation time in the heating and heat preservation process is 2-2.5 h.
9. The manufacturing method according to claim 7, wherein a final temperature of the reheating process is 550 to 560 ℃;
preferably, the vacuum degree of the product after the reheating process is less than or equal to 3 x 10 -3 Pa；
Preferably, the temperature rise rate of the reheating process is 5 to 6 ℃/min.
10. The manufacturing method according to any one of claims 1 to 8, wherein the temperature of the hot isostatic pressing treatment is 1100 to 1400 ℃;
preferably, the heating rate of the hot isostatic pressing treatment is 3-5 ℃/min;
preferably, the holding and pressure maintaining time of the hot isostatic pressing treatment is 2-3 h.
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| CN202211394297.5A CN115700155A (en) | 2022-11-08 | 2022-11-08 | Sheath and manufacturing method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118122924A (en) * | 2024-01-25 | 2024-06-04 | 西安欧中材料科技股份有限公司 | Forging method for near-net forming of powder superalloy turbine disc |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118122924A (en) * | 2024-01-25 | 2024-06-04 | 西安欧中材料科技股份有限公司 | Forging method for near-net forming of powder superalloy turbine disc |
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