CN114134299A - Heat treatment method and system for additive manufacturing of high-temperature alloy and terminal equipment - Google Patents

Heat treatment method and system for additive manufacturing of high-temperature alloy and terminal equipment Download PDF

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CN114134299A
CN114134299A CN202111522629.9A CN202111522629A CN114134299A CN 114134299 A CN114134299 A CN 114134299A CN 202111522629 A CN202111522629 A CN 202111522629A CN 114134299 A CN114134299 A CN 114134299A
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furnace
vacuum furnace
vacuum
heat treatment
temperature
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张英伟
刘斌
李广生
李会敏
关凯
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Xinjinghe Laser Technology Development Beijing Co ltd
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Xinjinghe Laser Technology Development Beijing Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
    • C21D1/773—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material under reduced pressure or vacuum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
    • B22F10/60—Treatment of workpieces or articles after build-up
    • B22F10/64—Treatment of workpieces or articles after build-up by thermal means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
    • B22F12/80—Plants, production lines or modules
    • B22F12/88—Handling of additively manufactured products, e.g. by robots
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y40/00—Auxiliary operations or equipment, e.g. for material handling
    • B33Y40/20—Post-treatment, e.g. curing, coating or polishing
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D11/00—Process control or regulation for heat treatments
    • C21D11/005—Process control or regulation for heat treatments for cooling
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/0062—Heat-treating apparatus with a cooling or quenching zone
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

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  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Robotics (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)

Abstract

The invention discloses a heat treatment method, a heat treatment system and terminal equipment for additive manufacturing of high-temperature alloy, relates to the technical field of additive manufacturing, and is used for reducing the cost and shortening the period of a heat treatment process for additive manufacturing of high-temperature alloy. The heat treatment method for the additive manufacturing of the high-temperature alloy comprises the following steps: and (5) carrying out vacuum-pumping treatment on the vacuum furnace. And respectively carrying out heating treatment and cooling treatment on the vacuum furnace after the vacuumizing treatment. The cooling time of the vacuum furnace was determined. And updating the target temperature or the pressure of the cooling medium filled into the vacuum furnace, and performing a single variable test to obtain the mapping relation between the air furnace heat treatment process of the high-temperature alloy and the vacuum furnace heat treatment process of the high-temperature alloy. The heat treatment method for the additive manufacturing of the high-temperature alloy is applied to a heat treatment system for the additive manufacturing of the high-temperature alloy. The invention provides a heat treatment method, a heat treatment system and terminal equipment for additive manufacturing of a high-temperature alloy, which are used for forming a heat treatment process of a manual vacuum furnace.

Description

Heat treatment method and system for additive manufacturing of high-temperature alloy and terminal equipment
Technical Field
The invention relates to the technical field of additive manufacturing, in particular to a heat treatment method and system for additive manufacturing of a high-temperature alloy and terminal equipment.
Background
The high-temperature alloy is a metal material taking iron, nickel and cobalt as a matrix, has the advantages of high temperature resistance, stable structure, oxidation resistance and the like, is widely applied in the field of aerospace, and is mainly used for manufacturing hot end parts such as guide vanes, flame tubes, heat exchangers, turbine discs and the like. The traditional high-temperature alloy manufacturing process has long flow, the heat treatment is generally carried out in the air atmosphere, the cost is high, the difficulty is high, and the manufacturing period is long. Accordingly, high temperature alloy components are currently manufactured using additive manufacturing techniques.
Because the additive manufacturing is a heat treatment process of near-net high-temperature alloy, the machining allowance is small, and a vacuum heat treatment process is generally adopted for treatment. In addition, because the cooling medium and cooling mechanism of the vacuum heat treatment process are different from those of the air furnace, and the mechanical properties of the high-temperature alloy, such as strength, plasticity, creep deformation and the like, are very sensitive to the cooling speed of the heat treatment process, and the existing manufacturing handbooks can find the air furnace heat treatment process, the heat treatment process of the air furnace needs to be converted into the vacuum heat treatment process which is matched with the characteristics of the vacuum furnace and meets the mechanical property requirements in the prior art. The existing method has the disadvantages of large workload, high research and development cost, long period and low universality. Therefore, how to reduce the workload, the work cycle, the research and development cost and improve the versatility of converting the air furnace heat treatment process into the vacuum heat treatment process which is matched with the characteristics of the vacuum furnace and meets the mechanical property requirements are important issues in front of the additive manufacturing material engineers.
Disclosure of Invention
The invention aims to provide a heat treatment method, a heat treatment system and terminal equipment for additive manufacturing of a high-temperature alloy, which are used for reducing the cost of a heat treatment process for the additive manufacturing of the high-temperature alloy, shortening the period and improving the universality.
In order to achieve the above object, the present invention provides a heat treatment method for additive manufacturing of a superalloy, the heat treatment method for the superalloy being applied to a vacuum heat treatment process of the superalloy, the heat treatment method for the superalloy comprising:
and (3) carrying out vacuum-pumping treatment on the vacuum furnace under the condition that the vacuum furnace used in the vacuum heat treatment process of the high-temperature alloy is filled with standard test materials.
And performing stepped heating treatment on the vacuum furnace after the vacuum-pumping treatment according to the heating requirement of the vacuum furnace. The heating requirement of the vacuum furnace comprises controlling the temperature rise rate V and determining the heating target temperature T1。
And according to the cooling requirement of the vacuum furnace, filling a cooling medium into the vacuum furnace to cool the heated standard test material in the vacuum furnace, so as to obtain the furnace temperature curve of the vacuum furnace. The cooling requirements of the vacuum furnace include that the pressure of the cooling medium filled into the vacuum furnace is positive integral multiple of atmospheric pressure and is less than the maximum cooling medium pressure of the vacuum furnace.
And determining the cooling time of the vacuum furnace according to the furnace temperature curve of the vacuum furnace.
Updating the target temperature T1Or updating the pressure of the cooling medium filled into the vacuum furnace, and performing single variable tests to obtain multiple groups of test results.
And obtaining the mapping relation between the air furnace heat treatment process of the high-temperature alloy and the vacuum furnace heat treatment process of the high-temperature alloy according to the multiple groups of test results.
Compared with the prior art, in the heat treatment method for additive manufacturing of the high-temperature alloy, the debugged vacuum furnace filled with the standard test material is vacuumized, and after the vacuum condition is met, the vacuum furnace after the vacuumizing is subjected to the stepped heating according to the heating requirement of the vacuum furnaceTreating, then filling a cooling medium into the vacuum furnace according to the cooling requirement of the vacuum furnace to cool the heated standard test material in the vacuum furnace to obtain a furnace temperature curve of the vacuum furnace so as to obtain cooling time, and finally updating the target temperature T1Or after updating the pressure of the cooling medium filled into the vacuum furnace, performing a single variable experiment to obtain a plurality of groups of test results, and analyzing the plurality of groups of test results to determine the pressure and the target temperature T of the cooling medium filled into the vacuum furnace1And a cooling time table, thereby obtaining an "instruction manual" of the vacuum furnace. And then, obtaining the mapping relation between the air furnace heat treatment process of the high-temperature alloy and the vacuum furnace heat treatment process of the high-temperature alloy after corresponding to the cooling mode of the air furnace. In practical applications, for example, the high-temperature alloy to be heat-treated is A, an air furnace experiment is performed on A, and after the air furnace heat treatment process of A is determined, the pressure of the cooling medium and the target temperature T of the vacuum furnace heat treatment process of A can be determined according to the mapping relationship between the air furnace heat treatment process of the high-temperature alloy and the vacuum furnace heat treatment process of the high-temperature alloy1And a cooling time. On the basis, because the heat transfer in the vacuum state is not good, the temperature rise speed is reduced by controlling the temperature rise speed and the step-type temperature rise method in the heat treatment method for manufacturing the high-temperature alloy by the additive manufacturing method, so that the temperature in the furnace burden and the temperature on the surface layer are uniform.
In summary, the heat treatment method for additive manufacturing of high-temperature alloy in the invention can form a search-type and manual-type technical data, thereby reducing the search and optimization cost of the vacuum heat treatment method for additive manufacturing of high-temperature alloy, shortening the cycle and having strong universality.
The present invention also provides a terminal device, including: a processor and a communication interface, the communication interface coupled with the processor, the processor configured to execute a computer program or instructions to implement the above-described method of heat treating an additive manufactured superalloy.
Compared with the prior art, the beneficial effects of the terminal device provided by the invention are the same as the beneficial effects of the heat treatment method for the material increase manufacturing of the high-temperature alloy in the technical scheme, and the details are not repeated here.
The invention also provides a heat treatment system for additive manufacturing of a superalloy, comprising:
the terminal device is provided.
A vacuum furnace in communication with the terminal device;
and a cooling medium storage device in communication with the terminal device.
Compared with the prior art, the beneficial effects of the heat treatment system for additive manufacturing of the high-temperature alloy provided by the invention are the same as the beneficial effects of the heat treatment method for additive manufacturing of the high-temperature alloy in the technical scheme, and the details are not repeated here.
The present invention also provides a computer storage medium having instructions stored thereon that, when executed, cause the above-described method of heat treating for additive manufacturing of a superalloy to be performed.
Compared with the prior art, the beneficial effects of the computer storage medium provided by the invention are the same as the beneficial effects of the heat treatment method for the additive manufacturing of the high-temperature alloy in the technical scheme, and the details are not repeated here.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic diagram of a thermal processing system for additive manufacturing a superalloy in an embodiment of the present invention;
FIG. 2 is a block flow diagram of a thermal processing method for additive manufacturing a superalloy in an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a thermal processing control apparatus for additive manufacturing of a superalloy in an embodiment of the present invention;
fig. 4 is a schematic diagram of a hardware structure of a terminal device in the embodiment of the present invention;
fig. 5 is a schematic structural diagram of a chip in an embodiment of the invention.
Detailed Description
In order to facilitate clear description of technical solutions of the embodiments of the present invention, in the embodiments of the present invention, terms such as "first" and "second" are used to distinguish the same items or similar items having substantially the same functions and actions. For example, the first threshold and the second threshold are only used for distinguishing different thresholds, and the sequence order of the thresholds is not limited. Those skilled in the art will appreciate that the terms "first," "second," etc. do not denote any order or quantity, nor do the terms "first," "second," etc. denote any order or importance.
It is to be understood that the terms "exemplary" or "such as" are used herein to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "e.g.," is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.
In the present invention, "at least one" means one or more, "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone, wherein A and B can be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of the singular or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, a and b combination, a and c combination, b and c combination, or a, b and c combination, wherein a, b and c can be single or multiple.
The high-temperature alloy is a metal material taking iron, nickel and cobalt as a matrix, has the advantages of high temperature resistance, stable structure, oxidation resistance and the like, is widely applied in the field of aerospace, and is mainly used for manufacturing hot end parts such as guide vanes, flame tubes, heat exchangers, turbine discs and the like. The traditional manufacturing process comprises smelting, forging, heat treatment and mechanical processing, wherein the heat treatment is generally carried out in air atmosphere, and the process is characterized in that: the method has the advantages of long manufacturing period, high tooling die cost, high manufacturing difficulty of parts with complex structures, low dimensional precision and low qualification rate, and low heat treatment cost but serious oxidation. As a near-net-shape and flexible manufacturing technology, the laser additive manufacturing technology has many advantages, and can realize the die-free manufacturing of parts with complex structures.
At present, laser additive manufacturing processes of high-temperature alloys such as GH4169, GH3625 and GH3536 are mature and industrialized, laser additive manufacturing is a near-net forming process, machining allowance is small, a vacuum heat treatment method is generally adopted, most of the laser additive manufacturing processes which can be found by current manuals are heat treatment methods of an air furnace, and because a cooling medium and a cooling mechanism of the vacuum heat treatment method are different from those of the heat treatment method of the air furnace, mechanical properties such as strength, plasticity, creep and the like of the high-temperature alloys are very sensitive to the cooling speed of the heat treatment process. Therefore, how to convert the heat treatment process of the air furnace into a vacuum heat treatment process which is matched with the characteristics of the vacuum furnace and meets the mechanical property requirements is an important subject in front of an additive manufacturing material engineer. The current common methods are:
the first step is as follows: firstly, a series of air furnace experiments are carried out, and the optimal heat treatment temperature, heat preservation time and cooling mode (cooling speed) are determined by combining metallographic structure and mechanical property;
the second step is that: according to the equipment characteristics of the vacuum furnace, the heat treatment temperature and the heat preservation time are kept unchanged (the air furnace is used), the cooling speed is controlled by adjusting the gas quenching pressure and the fan parameters, and the optimal cooling speed (the gas quenching pressure and the fan parameters) of the vacuum furnace is determined by combining metallographic structure and mechanical properties.
The disadvantages of this method are: 1) the vacuum heat treatment experiment workload is large, the research and development cost is high, and the period is long. The cooling speed of the vacuum furnace is unknown, so that multiple groups of experiments are required, the cost of the heat treatment experiment, metallographic analysis and mechanical property test of the vacuum furnace is high, the period is long, and particularly the heat treatment cost of the vacuum furnace is 8-15 times that of the air furnace experiment; 2) the versatility is not strong. When a material is developed, a plurality of groups of vacuum furnace heat treatment experiments are repeatedly carried out, and the universality is not strong.
In order to overcome the problems, the embodiment of the invention provides a heat treatment method for additive manufacturing of high-temperature alloy, which is applicable to heat treatment processes of vacuum furnaces of various high-temperature alloy components. It should be understood that the superalloy components herein may be iron-based wrought superalloy components, nickel-based wrought superalloy components, and cobalt-based superalloy components. The heat treatment method for the additive manufacturing of the high-temperature alloy is applied to a heat treatment system for the additive manufacturing of the high-temperature alloy.
Fig. 1 is a schematic structural diagram of a heat treatment system for additive manufacturing of a superalloy according to an embodiment of the present invention. As shown in fig. 1, the heat treatment system for additive manufacturing of a superalloy comprises: the vacuum furnace 200 and the cooling medium storage device 300 are respectively connected with the terminal equipment 100 in a communication way.
As shown in fig. 1, the terminal device 100 may generate and update the target temperature T1And generating and updating the pressure of the cooling medium charged into the vacuum furnace so that the vacuum furnace 200 follows different target temperatures T under the control of the terminal device 1001Or different pressure conditions of the cooling medium filled into the vacuum furnace are subjected to single variable tests to obtain a plurality of test results, so that automatic control is realized, and the processing period is saved. Meanwhile, the terminal device 100 may control the cooling medium storage device 300 to charge the cooling medium into the vacuum furnace 200 to perform a cooling process on the heated standard test material in the vacuum furnace 200 according to the pressure of the cooling medium charged into the vacuum furnace 200 generated and updated by the terminal device 100, so as to obtain a furnace temperature curve of the vacuum furnace 200. It should be understood that the terminal device 100 herein may be a desktop computer, a notebook computer, a tablet computer, etc. terminal device 100.
In practical applications, the terminal device 100 can control the vacuum furnace 200 to adjust the target temperature T1Or a single variable test is performed at different pressures of the cooling medium charged into the vacuum furnace 200. At this time, it should be noted that the target temperature T is first set1It is possible to perform tests for the variables or to perform tests for different pressure variables of the cooling medium charged into the vacuum furnace 200, and the test sequence has no influence on the result and is not limited herein. For example, here for a target temperature T1The tests were carried out for variable quantities, ensuring constant pressure of the cooling medium charged into the vacuum furnace 200 in each test. At this time, the terminal device 100 transmits a signal for vacuum process to the vacuum furnace 200, and the vacuum extractor in the vacuum furnace 200 receives the signal for vacuum process transmitted from the terminal device 100, and then performs vacuum process on the vacuum furnace 200, and transmits the vacuum result to the terminal device 100. When the terminal device 100 receives the vacuumizing result and determines that the vacuumizing result meets the requirement, the terminal device 100 sends a heating processing signal to the vacuum furnace 200 according to the heating requirement, after the vacuum furnace 200 receives the heating processing signal sent by the terminal device 100, the vacuum furnace 200 after the vacuumizing processing is subjected to the stepped heating processing according to the heating requirement and sends the heating result to the terminal device 100, when the terminal device 100 receives the heating result signal and determines that the heating result meets the requirement, the terminal device 100 sends a cooling processing signal to the cooling medium storage device 300 according to the cooling requirement, after the cooling processing signal sent by the terminal device 100 is received by the cooling medium storage device 300, the cooling medium filled into the vacuum furnace 200 after the heating processing is subjected to the cooling processing according to the cooling requirement, and the standard test material in the vacuum furnace 200 after the heating processing is subjected to the cooling processing, and sending the result of the cooling process to the terminal device 100, and when the terminal device 100 receives the result of the cooling process and determines that the result of the cooling process meets the requirement, the terminal device 100 analyzes the processes of the heating process and the cooling process of the vacuum furnace 200 to obtain the furnace temperature curve of the vacuum furnace 200 in the test. Then, the target temperature T is updated by the terminal device 1001Then, the above steps are repeated until the terminal device 100 determines a plurality of target temperatures T1Having all obtained the test results, the terminal device 100 stops updating the target temperature T1. Next, a test was performed using the pressure of the cooling medium charged into the vacuum furnace 200 as a variable to ensure the target temperature T in each test1Is constant. Heavy loadAfter the furnace temperature curve of the vacuum furnace 200 of the test is obtained, the terminal device 100 updates the pressure of the cooling medium charged into the vacuum furnace 200, and repeats the above steps until the terminal device 100 determines that all the pressures of the cooling medium charged into the vacuum furnace 200 have obtained the test result, and the terminal device 100 stops updating the pressure of the cooling medium charged into the vacuum furnace 200.
The communication connection mode in the embodiment of the invention can be wireless communication or wired communication. The wireless communication may be based on networking technologies such as wifi, zigbee, and the like. Wired communication may implement a communication connection based on a data line or a power line carrier. The communication interface may be a standard communication interface. The standard communication interface may be a serial interface or a parallel interface. For example, the terminal device 100 may use an I2C (Inter-Integrated Circuit) bus communication, and may also use a power line carrier communication technology to implement the communication connection with the vacuum oven 200.
Based on the above heat treatment system for additive manufacturing of high-temperature alloy, embodiments of the present invention also provide a heat treatment method for additive manufacturing of high-temperature alloy, which may be performed by the terminal device 100 or a chip applied to the terminal device 100. The following embodiment is described with the terminal device 100 as the main execution subject.
Fig. 2 is a schematic diagram illustrating a heat treatment method for additive manufacturing of a high-temperature alloy according to an embodiment of the present invention, which is applied to the heat treatment system for additive manufacturing of a high-temperature alloy shown in fig. 1. As shown in fig. 2, the heat treatment method for additive manufacturing of a superalloy according to the embodiment of the present invention is applied to a vacuum heat treatment process of a superalloy, and it should be understood that the vacuum heat treatment process of a superalloy may be selected according to actual situations, for example, the vacuum heat treatment process may be a vacuum solution heat treatment of a superalloy, a vacuum homogenization treatment of a superalloy, or a vacuum stress relief heat treatment process of a superalloy. Specifically, the heat treatment method of the high-temperature alloy comprises the following steps:
s110: and (3) the terminal equipment carries out vacuum-pumping treatment on the vacuum furnace under the condition that the vacuum furnace used in the vacuum heat treatment process of the high-temperature alloy is determined to be filled with standard test materials. It should be understood that the vacuum furnace is a vacuum high-pressure gas quenching furnace, and a cooling fan is arranged inside a furnace body of the vacuum high-pressure gas quenching furnace. The standard test material loading standard is as follows: the total weight of the standard test material is 30-70% of the maximum charging amount of the vacuum furnace. The standard test material is made of one of iron-based wrought superalloy, nickel-based wrought superalloy and cobalt-based superalloy. For example, the material of the test material may be an iron-based wrought superalloy, a nickel-based wrought superalloy, or a cobalt-based superalloy. In general, the material of the common standard test material can be selected from common high-temperature alloy materials such as GH3625, GH4169 or GH 3536. Meanwhile, in order to facilitate heat treatment, improve the heat treatment effect and improve the accuracy of the test result, the standard test material can be a plate with the thickness of 20-30 mm or a bar with the diameter of 20-30 mm. It should be noted here that the adjacent standard test materials are spaced apart from each other and cannot be stacked, so that there is almost no difference in the heating rate and the cooling rate between the standard test materials during the heating and cooling processes, thereby reducing the influence on the test results.
In practical application, under the condition that the terminal equipment determines that a standard test material is filled in a vacuum furnace used in the vacuum heat treatment process of the high-temperature alloy, the terminal equipment controls a vacuum pump set of the vacuum furnace to start, and the vacuum furnace is vacuumized, so that the pressure in the vacuum furnace is lower than 0.1 Pa.
S120: and the terminal equipment performs stepped heating treatment on the vacuum furnace after the vacuum-pumping treatment according to the heating requirement of the vacuum furnace. The heating requirement of the vacuum furnace comprises controlling the temperature rise rate V and determining the heating target temperature T1. Wherein the heating rate V is less than or equal to 10 ℃/min, and the target temperature T1The range of T is more than or equal to 900 DEG C11300 ℃ or less, and different target temperatures T for facilitating analysis of the relationship between the pressure of the cooling medium charged into the vacuum furnace and the target temperature1The difference between them is the same. For example, the target temperature T1Can take the values of 900 ℃, 1000 ℃ and 110 DEG C0 ℃ and 1200 ℃; the temperature may be 950 ℃, 1050 ℃, 1150 ℃, 1250 ℃, etc., but is not limited thereto.
As a possible implementation manner, the step-type heating treatment of the vacuum furnace after the vacuum-pumping treatment according to the heating requirement of the vacuum furnace specifically includes: according to the heating requirement of the vacuum furnace, the temperature of the vacuum furnace after vacuumization is increased from room temperature to 400-600 ℃, and then the temperature is kept for 20-40 min; continuously heating to 700-900 ℃, preserving the heat for 20-40 min, and then continuously heating to the target temperature T1And keeping the temperature for 100-140 min. Because the heat transfer in the vacuum state is not good, in the heat treatment method for manufacturing the high-temperature alloy in the additive mode, the temperature rise speed can be reduced by adopting the step-type temperature rise method, so that the internal temperature and the surface temperature of the standard test material in the furnace burden are more uniform, and the test result is more accurate.
S130: and the terminal equipment fills a cooling medium into the vacuum furnace according to the cooling requirement of the vacuum furnace to carry out cooling treatment on the standard test material in the vacuum furnace after heating treatment, so as to obtain the furnace temperature curve of the vacuum furnace. The cooling medium here may be an inert gas or nitrogen. The cooling requirements of the vacuum furnace include that the pressure of the cooling medium filled into the vacuum furnace is positive integral multiple of atmospheric pressure and is less than or equal to the maximum cooling medium pressure of the vacuum furnace.
In practical application, the terminal equipment can control the cooling medium storage device to charge the cooling medium into the vacuum furnace according to the cooling requirement of the vacuum furnace to carry out cooling treatment on the standard test material in the vacuum furnace after heating treatment, so as to obtain the furnace temperature curve of the vacuum furnace. It is to be understood that the cooling medium storage means here are means which are present independently of the vacuum furnace.
As a possible implementation mode, in order to improve the cooling effect and the working efficiency, the cooling requirement of the vacuum furnace also comprises the control of the starting of a cooling fan. Specifically, the terminal device 100 may control the cooling medium storage device to fill cooling gas into the vacuum furnace according to the cooling requirement of the vacuum furnace, and control the cooling fan to start up, and perform forced circulation until the temperature in the vacuum furnace is lower than the cooling temperature.
S140: and the terminal equipment determines the cooling time of the vacuum furnace according to the furnace temperature curve of the vacuum furnace.
As a possible implementation manner, the determining the cooling time of the vacuum furnace according to the furnace temperature curve of the vacuum furnace specifically includes: determining that the temperature of the vacuum furnace is less than or equal to the cooling temperature T2In the case of (3), the terminal device determines the cooling time of the vacuum furnace based on the furnace temperature curve of the vacuum furnace. Wherein the cooling temperature T2The temperature was 80 ℃.
S150: updating target temperature T of terminal equipment1Or the pressure of the cooling medium filled into the vacuum furnace is used for carrying out single variable tests to obtain a plurality of groups of test results. It is to be noted here that the target temperature T1The temperature is traversed between 900 ℃ and 1300 ℃ and an arithmetic progression is formed. For example, the target temperature T1The temperature may be 900 deg.C, 1000 deg.C, 1100 deg.C, 1200 deg.C, 950 deg.C, 1050 deg.C, 1150 deg.C, 1250 deg.C, etc., but is not limited thereto. Meanwhile, in order to improve the safety of the operation and the accuracy of the result, the pressure of the cooling medium charged into the vacuum furnace should go through 1atm to [ Q ]]All positive integers of [ Q ]]Representing the maximum cooling medium pressure (in atm) of the furnace. For example, when Q is 5atm, the pressure of the cooling medium charged into the vacuum furnace may be 1atm, 2atm, 3atm, 4atm, 5 atm.
S160: and the terminal equipment obtains the mapping relation between the air furnace heat treatment process of the high-temperature alloy and the vacuum furnace heat treatment process of the high-temperature alloy according to the multiple groups of test results.
In practical application, the terminal device can draw a table of the pressure, the target temperature and the cooling time of the cooling medium filled into the vacuum furnace according to the cooling time in the plurality of groups of test results. Then, it was confirmed by the analysis of the skilled person that if at least 75% of the data of the cooling time at the target temperature of 900 to 1300 ℃ falls within (0, 30] min, if at least 75% of the data of the cooling time at the target temperature of 900-1300 ℃ falls within (30, 45) min under the pressure of the cooling medium charged into the vacuum furnace, if at least 75% of the data of the cooling time at the target temperature of 900-1300 ℃ falls within (45, 120] min, the corresponding cooling mode of the air furnace is furnace cooling, and thus, a mapping relation between the heat treatment process of the air furnace and the heat treatment process of the vacuum furnace is established.
The heat treatment method for additive manufacturing of the superalloy in the embodiment of the present invention is further described below with reference to examples.
Example 1
In this example, the maximum cooling medium pressure of the vacuum high-pressure gas quenching furnace used was 6atm, and the maximum charging amount was 500 kg. The cooling medium used was argon gas, and the standard test material used was GH4169, which was a sheet-like material having a thickness of 20 mm. The target temperature is 900 deg.C, 1000 deg.C, 1100 deg.C, 1200 deg.C, and the pressure of the cooling medium (i.e. gas quenching pressure) charged into the vacuum furnace is 1atm, 2atm, 3atm, 4atm, 5atm, and 6 atm. The specific implementation process of the heat treatment method for the additive manufacturing of the high-temperature alloy provided by the embodiment of the invention is as follows:
the method comprises the following steps: according to the maximum charging amount, 150kg of GH4169 standard test materials with the thickness of 20mm are charged into the furnace, and gaps are left among the standard test materials, so that the test materials cannot be stacked.
Step two: and closing the furnace door, starting a vacuum pump set, and vacuumizing the vacuum high-pressure gas quenching furnace to enable the pressure in the furnace to be lower than 0.1 Pa.
Step three: and carrying out stepped heating treatment on the vacuum high-pressure gas quenching furnace after the vacuumizing treatment. Specifically, the temperature is increased from room temperature to 500 ℃, the temperature is kept at 500 ℃ for 30min, the temperature is continuously increased to 800 ℃, the temperature is kept for 30min, the temperature is continuously increased to the target temperature of 900 ℃, and the temperature is kept for 120 min. Wherein the temperature rise rate V is less than or equal to 10 ℃/min.
Step four: argon gas of 1atm is filled into the furnace, and a fan is started to carry out forced circulation until the temperature in the furnace is lower than 80 ℃.
Step five: and calculating the time for cooling from the target temperature to 80 ℃ according to the furnace temperature curve of the vacuum furnace.
Step six: and repeating the first step to the fifth step, respectively changing the value of the target temperature and the value of the pressure of the cooling medium filled into the vacuum furnace, and performing a single variable test.
Step seven: according to the test results, a table of the pressure of the cooling medium charged into the vacuum furnace, the target temperature and the cooling time is drawn, if at least 75% of the data of the cooling time of the target temperature of 900 to 1300 ℃ falls within (0, 30] min under the pressure of the cooling medium charged into a certain vacuum furnace, the corresponding cooling manner of the air furnace is water cooling, if at least 75% of the data of the cooling time of the target temperature of 900 to 1300 ℃ falls within (30, 45] min under the pressure of the cooling medium charged into a certain vacuum furnace, the corresponding cooling manner of the air furnace is air cooling, if at least 75% of the data of the cooling time of the target temperature of 900 to 1300 ℃ falls within (45, 120] min under the pressure of the cooling medium charged into a certain vacuum furnace, the corresponding cooling manner of the air furnace is furnace cooling, and thus, a mapping relationship between the heat treatment process of the air furnace and the heat treatment process of the vacuum furnace is established, as shown in table 1.
TABLE 1 map
Figure BDA0003408317520000121
As can be seen from table 1, the cooling effect in which the pressure of the cooling medium charged into the vacuum furnace (i.e., the gas quenching pressure) is 1atm is equivalent to the furnace cooling effect of the high-temperature alloy, the cooling effect in which the pressure of the cooling medium charged into the vacuum furnace (i.e., the gas quenching pressure) is 2atm is equivalent to the air cooling effect of the high-temperature alloy, and the cooling effect in which the pressure of the cooling medium charged into the vacuum furnace (i.e., the gas quenching pressure) is greater than 2atm is equivalent to the water cooling effect of the high-temperature alloy. On the contrary, the heat treatment process parameters of the corresponding vacuum furnace can be rapidly determined according to the experimental results of the air furnace by comparing with the table 1.
Example 2
In this example, the maximum cooling medium pressure of the vacuum high-pressure gas quenching furnace used was 6atm, and the maximum charging amount was 500 kg. The adopted cooling medium is nitrogen, and the adopted standard test material is GH3625 standard test material with the thickness of 25mm plate shape. The target temperature is 950 ℃, 1050 ℃, 1150 ℃ and 1250 ℃, and the pressure (namely gas quenching pressure) of the cooling medium filled into the vacuum furnace is 1atm, 2atm, 3atm, 4atm, 5atm and 6 atm. The specific implementation process of the heat treatment method for the additive manufacturing of the high-temperature alloy provided by the embodiment of the invention is as follows:
the method comprises the following steps: according to the maximum charging amount, 150kg of GH3625 standard test materials with the thickness of 25mm are charged into the furnace, and gaps are left among the standard test materials, so that the test materials cannot be stacked.
Step two: and closing the furnace door, starting a vacuum pump set, and vacuumizing the vacuum high-pressure gas quenching furnace to enable the pressure in the furnace to be lower than 0.1 Pa.
Step three: and carrying out stepped heating treatment on the vacuum high-pressure gas quenching furnace after the vacuumizing treatment. Specifically, the temperature is increased from room temperature to 400 ℃, the temperature is kept at 400 ℃ for 40min, the temperature is continuously increased to 700 ℃, the temperature is kept for 40min, the temperature is continuously increased to a target temperature of 950 ℃, and the temperature is kept for 140 min. Wherein the temperature rise rate V is less than or equal to 10 ℃/min.
Step four: 1atm nitrogen is filled into the furnace, and a fan is started to perform forced circulation until the temperature in the furnace is lower than 80 ℃.
Step five: and calculating the time for cooling from the target temperature to 80 ℃ according to the furnace temperature curve of the vacuum furnace.
Step six: and repeating the first step to the fifth step, respectively changing the value of the target temperature and the value of the pressure of the cooling medium filled into the vacuum furnace, and performing a single variable test.
Step seven: according to the test results, a table of the pressure of the cooling medium charged into the vacuum furnace, the target temperature and the cooling time is drawn, if at least 75% of the data of the cooling time of the target temperature of 900 to 1300 ℃ falls within (0, 30] min under the pressure of the cooling medium charged into a certain vacuum furnace, the corresponding cooling manner of the air furnace is water cooling, if at least 75% of the data of the cooling time of the target temperature of 900 to 1300 ℃ falls within (30, 45] min under the pressure of the cooling medium charged into a certain vacuum furnace, the corresponding cooling manner of the air furnace is air cooling, if at least 75% of the data of the cooling time of the target temperature of 900 to 1300 ℃ falls within (45, 120] min under the pressure of the cooling medium charged into a certain vacuum furnace, the corresponding cooling manner of the air furnace is furnace cooling, and thus, a mapping relationship between the heat treatment process of the air furnace and the heat treatment process of the vacuum furnace is established, as shown in table 2.
TABLE 2 map
Figure BDA0003408317520000131
As can be seen from table 2, the cooling effect in which the pressure of the cooling medium charged into the vacuum furnace (i.e., the gas quenching pressure) is 1atm is equivalent to the furnace cooling effect of the high-temperature alloy, the cooling effect in which the pressure of the cooling medium charged into the vacuum furnace (i.e., the gas quenching pressure) is 2atm is equivalent to the air cooling effect of the high-temperature alloy, and the cooling effect in which the pressure of the cooling medium charged into the vacuum furnace (i.e., the gas quenching pressure) is greater than 2atm is equivalent to the water cooling effect of the high-temperature alloy. On the contrary, the heat treatment process parameters of the corresponding vacuum furnace can be rapidly determined according to the experimental results of the air furnace by comparing with the table 2.
Example 3
In this example, the maximum cooling medium pressure of the vacuum high-pressure gas quenching furnace used was 6atm, and the maximum charging amount was 500 kg. The cooling medium adopted is argon, and the adopted standard test material is GH3536 standard test material with the thickness of 30mm in a bar shape. The target temperature is 970 deg.C, 1070 deg.C, 1170 deg.C, 1270 deg.C, and the pressure (i.e. gas quenching pressure) of the cooling medium charged into the vacuum furnace is 1atm, 2atm, 3atm, 4atm, 5atm, 6 atm. The specific implementation process of the heat treatment method for the additive manufacturing of the high-temperature alloy provided by the embodiment of the invention is as follows:
the method comprises the following steps: according to the maximum charging amount, 150kg of bar-shaped GH3536 standard test materials with the thickness of 30mm are charged into the furnace, and gaps are left among the standard test materials, so that the test materials cannot be stacked.
Step two: and closing the furnace door, starting a vacuum pump set, and vacuumizing the vacuum high-pressure gas quenching furnace to enable the pressure in the furnace to be lower than 0.1 Pa.
Step three: and carrying out stepped heating treatment on the vacuum high-pressure gas quenching furnace after the vacuumizing treatment. Specifically, the temperature is increased from room temperature to 600 ℃, the temperature is kept at 600 ℃ for 20min, the temperature is continuously increased to 900 ℃, the temperature is kept for 20min, the temperature is continuously increased to a target temperature of 970 ℃, and the temperature is kept for 100 min. Wherein the temperature rise rate V is less than or equal to 10 ℃/min.
Step four: argon gas of 1atm is filled into the furnace, and a fan is started to carry out forced circulation until the temperature in the furnace is lower than 80 ℃.
Step five: and calculating the time for cooling from the target temperature to 80 ℃ according to the furnace temperature curve of the vacuum furnace.
Step six: and repeating the first step to the fifth step, respectively changing the value of the target temperature and the value of the pressure of the cooling medium filled into the vacuum furnace, and performing a single variable test.
Step seven: according to the test results, a table of the pressure of the cooling medium charged into the vacuum furnace, the target temperature and the cooling time is drawn, if at least 75% of the data of the cooling time of the target temperature of 900 to 1300 ℃ falls within (0, 30] min under the pressure of the cooling medium charged into a certain vacuum furnace, the corresponding cooling manner of the air furnace is water cooling, if at least 75% of the data of the cooling time of the target temperature of 900 to 1300 ℃ falls within (30, 45] min under the pressure of the cooling medium charged into a certain vacuum furnace, the corresponding cooling manner of the air furnace is air cooling, if at least 75% of the data of the cooling time of the target temperature of 900 to 1300 ℃ falls within (45, 120] min under the pressure of the cooling medium charged into a certain vacuum furnace, the corresponding cooling manner of the air furnace is furnace cooling, and thus, a mapping relationship between the heat treatment process of the air furnace and the heat treatment process of the vacuum furnace is established, as shown in table 3.
TABLE 3 map
Figure BDA0003408317520000151
As can be seen from table 3, the cooling effect in which the pressure of the cooling medium charged into the vacuum furnace (i.e., the gas quenching pressure) was 1atm was equivalent to the furnace cooling effect of the high-temperature alloy, the cooling effect in which the pressure of the cooling medium charged into the vacuum furnace (i.e., the gas quenching pressure) was 2atm was equivalent to the air cooling effect of the high-temperature alloy, and the cooling effect in which the pressure of the cooling medium charged into the vacuum furnace (i.e., the gas quenching pressure) was more than 2atm was equivalent to the water cooling effect of the high-temperature alloy. On the contrary, the heat treatment process parameters of the corresponding vacuum furnace can be rapidly determined according to the experimental results of the air furnace and by comparing with the table 3.
In summary, in the heat treatment method for additive manufacturing of high-temperature alloy provided by the invention, the debugged vacuum furnace filled with the standard test material is vacuumized to reach the vacuum condition, the vacuum furnace after the vacuumization is subjected to the step-type heating treatment according to the heating requirement of the vacuum furnace, then the cooling medium is filled into the vacuum furnace according to the cooling requirement of the vacuum furnace to cool the standard test material in the vacuum furnace after the heating treatment, so that the furnace temperature curve of the vacuum furnace is obtained, the cooling time is obtained, and finally, the target temperature T is updated to obtain the target temperature T1Or after the pressure of the cooling medium filled into the vacuum furnace, performing a single variable experiment to obtain a plurality of groups of test results, and analyzing the plurality of groups of test results to determine the pressure and the target temperature T of the cooling medium filled into the vacuum furnace1And a cooling time table, thereby obtaining an "instruction manual" of the vacuum furnace. And then, obtaining the mapping relation between the air furnace heat treatment process of the high-temperature alloy and the vacuum furnace heat treatment process of the high-temperature alloy after corresponding to the cooling mode of the air furnace. In practical application, for example, the high-temperature alloy to be heat-treated is A, an air furnace experiment is carried out on A, and after the air furnace heat treatment process of A is determined, the pressure and the target temperature T of the cooling medium of the vacuum furnace heat treatment process of A can be determined correspondingly1And a cooling time. On the basis, because the heat transfer in the vacuum state is not good, the temperature rise speed is reduced by controlling the temperature rise speed and the step-type temperature rise method in the heat treatment method for manufacturing the high-temperature alloy by the additive manufacturing method, so that the temperature in the furnace burden and the temperature on the surface layer are uniform.
Therefore, the heat treatment method for manufacturing the high-temperature alloy by the additive has the advantages of strong universality and high engineering degree, can form search-type and manual-type technical data, reduces the experiment times of vacuum heat treatment in a limited way, reduces the production cost, shortens the period, and is particularly friendly to the research and development of new materials.
The above description mainly introduces the scheme provided by the embodiment of the present invention from the perspective of the terminal device 100. It is understood that the terminal device 100 includes corresponding hardware structures and/or software modules for performing the respective functions in order to implement the above-described functions. Those of skill in the art will readily appreciate that the present invention can be implemented in hardware or a combination of hardware and computer software, with the exemplary elements and algorithm steps described in connection with the embodiments disclosed herein. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The terminal device 100 according to the above method example may perform functional module division, for example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. It should be noted that, the division of the modules in the embodiment of the present invention is schematic, and is only a logic function division, and there may be another division manner in actual implementation.
Fig. 3 shows a block diagram of a thermal processing control apparatus 300 for additive manufacturing of a superalloy according to an embodiment of the present invention, in a case where a corresponding integrated unit is used. The heat treatment control device 300 for additive manufacturing of the superalloy may be the terminal device 100 shown in fig. 1, or may be a chip applied to the terminal device 100 shown in fig. 1.
As shown in fig. 3, the apparatus 300 for controlling heat treatment for additive manufacturing of a superalloy includes: a communication unit 301 and a processing unit 302. Optionally, the apparatus 300 for controlling heat treatment of additive manufacturing superalloy may further comprise a storage unit 303 for storing program codes and data of the apparatus 300 for controlling heat treatment of additive manufacturing superalloy.
In one example, as shown in fig. 3, the heat treatment control apparatus 300 for supporting additive manufacturing of a superalloy, which is described above, performs steps 110-160, which are performed by the terminal device 100 shown in fig. 1 in the above-described embodiment.
The Processing Unit 302 may be a Processor or a controller, and may be, for example, a Central Processing Unit (CPU), a general purpose Processor, a Digital Signal Processor (DSP), an Application-Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, a transistor logic device, a hardware component, or any combination thereof. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. A processor may also be a combination of computing functions, e.g., comprising one or more microprocessors, a DSP and a microprocessor, or the like. The communication unit 301 may be a transceiver, a transceiving circuit or a communication interface, etc. The storage unit 303 may be a memory.
When the processing unit 302 is a processor, the communication unit 301 is a transceiver, and the storage unit 303 is a memory, the thermal processing apparatus 300 for additive manufacturing high temperature alloy according to the embodiment of the present invention may be a schematic hardware configuration diagram of the terminal device shown in fig. 4.
Fig. 4 is a schematic diagram illustrating a hardware structure of the terminal device 100 according to an embodiment of the present invention. As shown in fig. 4, the terminal device 100 includes a processor 110 and a communication interface 130.
As shown in fig. 4, the processor 110 may be a general processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more ics for controlling the execution of programs according to the present invention. The number of the communication interfaces may be one or more. The communication interface 130 may use any transceiver or the like for communicating with other devices or communication networks.
As shown in fig. 4, the terminal device 100 may further include a communication line 140. Communication link 140 may include a path for transmitting information between the aforementioned components.
Optionally, as shown in fig. 4, the terminal device 100 may further include a memory 120. The memory 120 is used to store computer-executable instructions for performing aspects of the present invention and is controlled for execution by the processor 110. The processor 110 is configured to execute computer-executable instructions stored in the memory 120 to implement the methods provided by the embodiments of the present invention.
As shown in fig. 4, the memory 120 may be a read-only memory (ROM) or other types of static storage devices that can store static information and instructions, a Random Access Memory (RAM) or other types of dynamic storage devices that can store information and instructions, an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compact disc, laser disc, optical disc, digital versatile disc, blu-ray disc, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited to such. The memory 120 may be separate and coupled to the processor 110 via a communication link 140. The memory 120 may also be integrated with the processor.
Optionally, the computer-executable instructions in the embodiment of the present invention may also be referred to as application program codes, which is not specifically limited in this embodiment of the present invention.
In particular implementations, as one embodiment, processor 110 may include one or more CPUs, such as CPU0 and CPU1 in fig. 4, as shown in fig. 4.
In one embodiment, as shown in fig. 4, terminal device 100 may include a plurality of processors, such as processor 110 and processor 150 in fig. 4. Each of these processors may be a single core processor or a multi-core processor.
Fig. 5 is a schematic structural diagram of a chip 700 according to an embodiment of the present invention. As shown in fig. 5, the chip 700 includes one or more (including two) processors 710 and a communication interface 720.
Optionally, as shown in fig. 5, the chip 700 further includes a memory 730, and the memory 730 may include a read only memory 730 and a random access memory 730, and provides operating instructions and data to the processor 710. The portion of memory may also include non-volatile random access memory (NVRAM).
In some embodiments, as shown in FIG. 5, memory 730 stores elements, execution modules or data structures, or a subset thereof, or an expanded set thereof.
In the embodiment of the present invention, as shown in fig. 5, by calling an operation instruction stored in the memory 730 (the operation instruction may be stored in an operating system), a corresponding operation is performed.
As shown in fig. 5, the processor 710 controls processing operations of any one of the terminal devices 100, and the processor 710 may also be referred to as a Central Processing Unit (CPU).
As shown in fig. 5, memory 730 may include both read-only memory and random access memory, and provides instructions and data to processor 710. A portion of the memory 730 may also include NVRAM. For example, in-application memory 730, communication interface 720, and memory 730 are coupled together by a bus system that may include a power bus, a control bus, a status signal bus, etc., in addition to a data bus. For clarity of illustration, however, the various buses are labeled as bus system 740 in fig. 5.
As shown in fig. 5, the method disclosed in the above embodiments of the present invention may be applied to the processor 710, or implemented by the processor 710. The processor 710 may be an integrated circuit chip 700 having signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware or instructions in the form of software in the processor 710. The processor 710 may be a general purpose processor, a Digital Signal Processor (DSP), an ASIC, an off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, or discrete hardware components. The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 730, and the processor 710 reads the information in the memory 730 and performs the steps of the above method in combination with the hardware thereof.
An embodiment of the present invention further provides a computer-readable storage medium, where instructions are stored in the computer-readable storage medium, and when the instructions are executed, the functions performed by the terminal device 100 in the foregoing embodiments are implemented.
In one aspect, a chip 700 is provided, where the chip 700 is applied to a terminal device 100, the chip 700 includes at least one processor 710 and a communication interface 720, the communication interface 720 is coupled to the at least one processor 710, and the processor 710 is configured to execute instructions to implement the functions performed by the terminal device 100 in the foregoing embodiments.
In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer programs or instructions. The procedures or functions of the embodiments of the invention are performed in whole or in part when the computer program or instructions are loaded and executed on a computer. The computer may be a general purpose computer, a special purpose computer, a computer network, a terminal, user equipment, or other programmable device. The computer program or instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer program or instructions may be transmitted from one website site, computer, server, or data center to another website site, computer, server, or data center by wire or wirelessly. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that integrates one or more available media. The available media may be magnetic media, such as floppy disks, hard disks, magnetic tape; or optical media such as Digital Video Disks (DVDs); it may also be a semiconductor medium, such as a Solid State Drive (SSD).
While the invention has been described in connection with various embodiments, other variations to the disclosed embodiments can be understood and effected by those skilled in the art in practicing the claimed invention, from a review of the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other elements or steps, and the word "a" or "an" does not exclude a plurality. A single processor or other unit may fulfill the functions of several items recited in the claims. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage.
While the invention has been described in conjunction with specific features and embodiments thereof, it will be evident that various modifications and combinations can be made thereto without departing from the spirit and scope of the invention. Accordingly, the specification and figures are merely exemplary of the invention as defined in the appended claims and are intended to cover any and all modifications, variations, combinations, or equivalents within the scope of the invention. It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (10)

1. A heat treatment method for additive manufacturing of a high-temperature alloy is applied to a vacuum heat treatment process of the high-temperature alloy, and comprises the following steps:
carrying out vacuum-pumping treatment on the vacuum furnace under the condition that a standard test material is filled in the vacuum furnace used in the vacuum heat treatment process of the high-temperature alloy;
performing stepped heating treatment on the vacuum furnace after the vacuumizing treatment according to the heating requirement of the vacuum furnace; the heating requirement of the vacuum furnace comprises controlling the temperature rise rate V and determining the heating target temperature T1；
According to the cooling requirement of the vacuum furnace, filling a cooling medium into the vacuum furnace to cool the heated standard test material in the vacuum furnace, so as to obtain a furnace temperature curve of the vacuum furnace; the cooling requirement of the vacuum furnace comprises that the pressure of a cooling medium filled into the vacuum furnace is positive integral multiple of atmospheric pressure and is less than or equal to the maximum cooling medium pressure of the vacuum furnace;
determining the cooling time of the vacuum furnace according to the furnace temperature curve of the vacuum furnace;
updating the target temperature T1Or updating the pressure of the cooling medium filled into the vacuum furnace, and performing a single variable test to obtain a plurality of groups of test results;
and obtaining a mapping relation between the air furnace heat treatment process of the high-temperature alloy and the vacuum furnace heat treatment process of the high-temperature alloy according to the plurality of groups of test results.
2. The heat treatment method for additive manufacturing of high temperature alloy according to claim 1, wherein the total weight of the standard test material is 30-70% of the maximum charging amount of the vacuum furnace; and/or the presence of a gas in the gas,
the standard test material is made of one of an iron-based wrought superalloy, a nickel-based wrought superalloy and a cobalt-based superalloy; and/or the presence of a gas in the gas,
the shape of the standard test material is a plate with the thickness of 20 mm-30 mm or a bar with the diameter of 20 mm-30 mm; and/or the presence of a gas in the gas,
gaps are left between the standard test materials.
3. The thermal treatment method for additive manufacturing of high temperature alloy according to claim 1, wherein the temperature rise rate V is less than or equal to 10 ℃/min, and the target temperature T is1The range of T is more than or equal to 900 DEG C11300 ℃ or less and different target temperatures T1The difference between them is the same.
4. The heat treatment method for additive manufacturing of high-temperature alloy according to claim 1, wherein the step-wise heating treatment of the vacuumized vacuum furnace according to the heating requirement of the vacuum furnace comprises:
according to the heating requirement of the vacuum furnace, the temperature of the vacuum furnace after the vacuum-pumping treatment is increased from room temperature to 400-600 ℃, and then the temperature is kept for 20-40 min; continuously heating to 700-900 ℃, preserving the heat for 20-40 min, and then continuously heating to the target temperature T1And keeping the temperature for 100-140 min.
5. The thermal treatment method for additive manufacturing of high temperature alloy according to claim 1, wherein the determining the cooling time of the vacuum furnace according to the furnace temperature profile of the vacuum furnace comprises:
determining that the temperature of the vacuum furnace is less than or equal to a cooling temperature T2In the case of (3), the cooling time of the vacuum furnace is determined based on a furnace temperature curve of the vacuum furnace.
6. An additive manufactured superalloy as in claim 5Method for heat treatment, characterised in that the cooling temperature T2The temperature was 80 ℃.
7. The heat treatment method for the additive manufacturing of the high-temperature alloy according to any one of claims 1 to 6, wherein the vacuum furnace is a vacuum high-pressure gas quenching furnace, and a cooling fan is arranged inside a furnace body of the vacuum high-pressure gas quenching furnace; the cooling requirement of the vacuum furnace also comprises controlling the start of a cooling fan;
and/or the presence of a gas in the gas,
the vacuum heat treatment process of the high-temperature alloy comprises vacuum solid solution heat treatment of the high-temperature alloy, vacuum homogenization treatment of the high-temperature alloy or vacuum destressing heat treatment of the high-temperature alloy; and/or the presence of a gas in the gas,
the cooling medium is inert gas or nitrogen.
8. A terminal device, comprising: a processor and a communication interface, the communication interface coupled with the processor, the processor configured to execute a computer program or instructions to implement the method of heat treating an additive manufactured superalloy as claimed in any of claims 1-7.
9. A heat treatment system for additive manufacturing a superalloy, comprising:
the terminal device of claim 8;
a vacuum oven in communication with the terminal device;
and a cooling medium storage device in communication with the terminal device.
10. A computer storage medium having stored therein instructions that, when executed, cause a method of heat treatment for additive manufacturing a superalloy as in any of claims 1-7 to be performed.
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