CN116511534A - Method for preparing molybdenum-rhenium alloy pipe by electron beam selective melting technology - Google Patents
Method for preparing molybdenum-rhenium alloy pipe by electron beam selective melting technology Download PDFInfo
- Publication number
- CN116511534A CN116511534A CN202310566142.3A CN202310566142A CN116511534A CN 116511534 A CN116511534 A CN 116511534A CN 202310566142 A CN202310566142 A CN 202310566142A CN 116511534 A CN116511534 A CN 116511534A
- Authority
- CN
- China
- Prior art keywords
- molybdenum
- rhenium alloy
- rhenium
- electron beam
- beam selective
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- YUSUJSHEOICGOO-UHFFFAOYSA-N molybdenum rhenium Chemical compound [Mo].[Mo].[Re].[Re].[Re] YUSUJSHEOICGOO-UHFFFAOYSA-N 0.000 title claims abstract description 123
- 229910000691 Re alloy Inorganic materials 0.000 title claims abstract description 94
- 238000002844 melting Methods 0.000 title claims abstract description 52
- 230000008018 melting Effects 0.000 title claims abstract description 51
- 238000000034 method Methods 0.000 title claims abstract description 46
- 238000010894 electron beam technology Methods 0.000 title claims abstract description 35
- 238000005516 engineering process Methods 0.000 title claims abstract description 29
- 239000000843 powder Substances 0.000 claims abstract description 32
- 238000010438 heat treatment Methods 0.000 claims abstract description 18
- 238000005098 hot rolling Methods 0.000 claims abstract description 11
- 238000002360 preparation method Methods 0.000 claims abstract description 5
- 239000010410 layer Substances 0.000 claims description 22
- 230000008569 process Effects 0.000 claims description 14
- 238000003892 spreading Methods 0.000 claims description 11
- 230000007480 spreading Effects 0.000 claims description 11
- 239000000758 substrate Substances 0.000 claims description 11
- 238000012216 screening Methods 0.000 claims description 6
- 239000002356 single layer Substances 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 3
- 238000004381 surface treatment Methods 0.000 claims description 3
- 238000000227 grinding Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 18
- 238000012545 processing Methods 0.000 abstract description 12
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 239000000654 additive Substances 0.000 abstract description 4
- 230000000996 additive effect Effects 0.000 abstract description 4
- 239000012535 impurity Substances 0.000 abstract description 4
- 238000003672 processing method Methods 0.000 abstract description 4
- 238000005096 rolling process Methods 0.000 abstract description 4
- 230000006872 improvement Effects 0.000 abstract description 3
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 5
- 229910052750 molybdenum Inorganic materials 0.000 description 4
- 239000011733 molybdenum Substances 0.000 description 4
- 239000000956 alloy Substances 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 238000000746 purification Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 229910001182 Mo alloy Inorganic materials 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 238000000889 atomisation Methods 0.000 description 2
- 238000005253 cladding Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- WUAPFZMCVAUBPE-UHFFFAOYSA-N rhenium atom Chemical compound [Re] WUAPFZMCVAUBPE-UHFFFAOYSA-N 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 241000238367 Mya arenaria Species 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 239000011253 protective coating Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- 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
- B22F10/20—Direct sintering or melting
- B22F10/28—Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM]
-
- 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
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/60—Treatment of workpieces or articles after build-up
- B22F10/66—Treatment of workpieces or articles after build-up by mechanical 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
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/18—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by using pressure rollers
-
- 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
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
- B22F5/10—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of articles with cavities or holes, not otherwise provided for in the preceding subgroups
- B22F5/106—Tube or ring forms
-
- 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
- B33Y10/00—Processes of additive manufacturing
-
- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/16—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon
- C22F1/18—High-melting or refractory metals or alloys based thereon
-
- 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
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/18—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by using pressure rollers
- B22F2003/185—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by using pressure rollers by hot rolling, below sintering temperature
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Plasma & Fusion (AREA)
- Powder Metallurgy (AREA)
Abstract
The invention discloses a method for preparing a molybdenum-rhenium alloy pipe by using an electron beam selective melting technology, which belongs to the field of material science, wherein molybdenum-rhenium alloy powder is prepared from a molybdenum-rhenium section bar, and the preparation of the molybdenum-rhenium alloy pipe is completed by combining the electron beam selective melting technology in an additive manufacturing mode, so that the yield of the molybdenum-rhenium alloy pipe can be effectively improved, the yield of the electron beam selective melting technology is 70% -80%, the index improvement is obvious compared with the index improvement of the traditional processing method, and the recycled material can be recycled; and secondly, repeatedly carrying out heat treatment and hot rolling on the molybdenum-rhenium tube blank obtained by additive manufacturing, improving the rolling processing performance of the tube, integrally forming the molybdenum-rhenium alloy tube by using an electron beam selective melting technology, obviously reducing the impurity content and improving the later processing performance of the tube blank.
Description
Technical Field
The invention belongs to the field of material science, and relates to a method for preparing a molybdenum-rhenium alloy pipe by using an electron beam selective melting technology.
Background
Molybdenum is a high-melting point silver gray refractory rare metal, is an important raw material in the national defense industry, can be used as a flame guide and a combustion chamber of an aircraft engine, a throat, a nozzle and a valve of an aerospace vehicle liquid rocket engine, a nozzle of a rocket projectile, a satellite and airship skin, a ship wing, a guide plate, a protective coating, an air rudder of a missile, a high-temperature connecting piece, a soft shell bomb liner and the like, and can be used as a candidate material of an accident fault-tolerant fuel cladding in the nuclear industry. However, pure molybdenum in a body-centered cubic structure has poor ductility and toughness at room temperature, which greatly limits the application of the pure molybdenum in a reactor, and the addition of an alloying element, particularly rhenium element, can be considered as one of the most effective methods for improving the low-temperature brittleness of molybdenum metal.
In recent years, based on application requirements of deep space, deep sea exploration, land-based nuclear power supply and the like, a heat pipe reactor is a novel reactor which is focused in the industry. The molybdenum-rhenium alloy has excellent high-temperature strength, low-temperature processability and good compatibility with fuel, so that the molybdenum-rhenium alloy becomes a design material of a fuel cladding tube and a heat pipe in a heat pipe reactor. The reason for limiting the application of the molybdenum-rhenium alloy pipe is mainly that the yield is low. The conventional method for processing the molybdenum-rhenium alloy pipe material generally comprises the steps of carrying out pressure processing on a molten cast ingot and a powder metallurgy ingot to obtain a bar material, carrying out further strengthening and toughening on the bar material through deformation processing to form a high-strength molybdenum-alloy bar material, carrying out mechanical processing on the high-strength molybdenum-alloy bar material to obtain a pipe blank, and finally carrying out processes such as rolling, heat treatment and the like on the pipe blank to obtain the applicable molybdenum-rhenium pipe material. At present, the yield of the processing method is low by about 30%, and the utilization rate of the recycled materials is also at a low level; in order to eliminate the influence of impurity elements in the molybdenum-rhenium alloy on long-term service performance, the molybdenum-rhenium alloy needs to be further purified. There are two methods of purifying molybdenum-rhenium alloys, one is raw material purification, which increases the purity of the molybdenum or rhenium powder to a higher level. But offer limited levels of purity due to existing chemical methods; secondly, electron beam melting is a common method for radial purification of metals, and the purification effect is remarkable. However, the molybdenum-rhenium alloy after electron beam processing has coarse grains, the size reaches millimeter level, and the processing performance is seriously deteriorated. The coating forging or extrusion mode can be used for deformation reinforcement, but the yield is lower, so that the cost of the molybdenum-rhenium alloy pipe material is extremely high, and the application of the molybdenum-rhenium alloy in the pipe material is severely limited.
Disclosure of Invention
Aiming at the problems of low yield, low utilization rate of recycled materials and poor processability of molybdenum-rhenium alloy pipes in the prior art, the invention provides a method for preparing the molybdenum-rhenium alloy pipes by using an electron beam selective melting technology, which solves the problems in the prior art.
The invention is realized by the following technical scheme:
a method for preparing a molybdenum-rhenium alloy pipe by using an electron beam selective melting technology comprises the following steps:
step 1, spreading molybdenum-rhenium alloy powder with set granularity on a substrate layer by layer, and adopting an electron beam selective melting technology to melt layer by layer to obtain a molybdenum-rhenium alloy tube blank;
step 2, performing heat treatment on the obtained molybdenum-rhenium tube blank, and performing hot rolling;
and step 3, repeating the step 2 until the molybdenum-rhenium tube blank reaches the set diameter specification, and obtaining the molybdenum-rhenium alloy tube.
Preferably, the preparation method of the molybdenum-rhenium alloy powder with the particle size set in the step 1 comprises the following steps:
and (3) carrying out powdering treatment on the molybdenum-rhenium alloy section bar, and then screening the obtained molybdenum-rhenium alloy powder to obtain molybdenum-rhenium alloy powder with set granularity.
Preferably, the set granularity of the molybdenum-rhenium alloy powder is 45-105 mu m.
Preferably, the method for preparing the molybdenum-rhenium tube blank by adopting the electron beam selective melting technology in the step 1 comprises the following steps:
spreading a layer of molybdenum-rhenium alloy powder on a preheated substrate, preheating and melting, forming a molybdenum-rhenium alloy tube blank with a certain height on the substrate, spreading a layer of molybdenum-rhenium alloy powder on the obtained molybdenum-rhenium alloy tube blank again, preheating and melting, and repeating the process until the molybdenum-rhenium alloy tube blank reaches a preset height, thus obtaining the molybdenum-rhenium alloy tube blank.
Preferably, the preheating current is 11-15 mA, the preheating scanning speed is 10-20 m/s, the preheating scanning times are 15-25 times, the melting current is 11-15 mA, the melting scanning speed is 0.6-0.9 m/s, and the included angle of the plane scanning directions of the adjacent layers is 80-100 degrees.
Preferably, the thickness of the spread monolayer is 40-60 μm.
Preferably, the heat treatment temperature in the step 2 is 900-1000 degrees and the time is 30-50 min.
Preferably, the hot rolling temperature in step 2 is 750 to 850 °.
Preferably, the temperature of the repeated heat treatment in the step 3 is 850-950 ℃ and the time is 30-40 min.
Preferably, the following process is further included after the step 3:
and (3) carrying out surface treatment on the molybdenum-rhenium alloy pipe obtained in the step (3) to obtain a molybdenum-rhenium finished pipe.
Compared with the prior art, the invention has the following beneficial technical effects:
according to the method for preparing the molybdenum-rhenium alloy pipe by using the electron beam selective melting technology, provided by the invention, the preparation process of the traditional molybdenum-rhenium alloy pipe is changed, the molybdenum-rhenium alloy material is prepared into molybdenum-rhenium alloy powder, and the preparation of the molybdenum-rhenium alloy pipe is completed by combining the electron beam selective melting technology in an additive manufacturing mode, so that the yield of the molybdenum-rhenium alloy pipe can be effectively improved, the yield of the electron beam selective melting technology is 70% -80%, the improvement is obvious compared with the traditional processing method, and the recycled material can be recycled; and secondly, repeatedly carrying out heat treatment and hot rolling on the molybdenum-rhenium tube blank obtained by additive manufacturing, improving the rolling processing performance of the tube, integrally forming the molybdenum-rhenium alloy tube by using an electron beam selective melting technology, obviously reducing the impurity content and improving the later processing performance of the tube blank.
Drawings
FIG. 1 is a flow chart of a method for preparing a molybdenum-rhenium alloy pipe by using an electron beam selective melting technology according to the invention;
Detailed Description
The invention will now be described in further detail with reference to the accompanying drawings, which illustrate but do not limit the invention.
Referring to fig. 1, a method for preparing a molybdenum-rhenium alloy pipe by using an electron beam selective melting technology comprises the following steps:
s1, preparing molybdenum-rhenium alloy powder with uniform components;
the specific implementation process is as follows: the molybdenum-rhenium alloy powder with uniform components is prepared by using a plasma/arc rotary electrode atomization process, the alloy component of the raw material bar is molybdenum-rhenium, the diameter is 30mm, the length is 150mm, and the bar is required to be compact without gaps or serious inclusions. The current of the plasma rotary electrode atomization process is 1000-1200A, the rotating speed is 20000-35000 rpm, the feeding speed is 2-3 mm/s, and the granularity of the obtained molybdenum-rhenium alloy powder is 15-200 mu m;
and S2, screening the molybdenum-rhenium alloy powder obtained in the step S1 to obtain molybdenum-rhenium alloy powder with set granularity.
The specific implementation process is as follows: screening the molybdenum-rhenium alloy powder with uniform components by using a powder screen with 40-325 meshes, and fully screening to obtain molybdenum-rhenium alloy powder meeting the use standard of the next process, wherein the granularity of the molybdenum-rhenium alloy powder is 45-105 mu m;
s3, preheating a substrate of the electron beam selective melting manufacturing equipment in a vacuum environment;
the specific implementation process is as follows: the preheating current is 20-30 mA, the scanning speed of preheating is 10-20 m/s, the target preheating temperature is 800-1000 ℃, and the preheating is carried outArea is 175mm x 175mm 2 。
And S4, spreading a layer of molybdenum-rhenium alloy powder obtained in the step S2 on the preheated substrate, preheating and melting the molybdenum-rhenium alloy powder, and forming an end surface bottom layer of the molybdenum-rhenium alloy pipe on the substrate.
The specific implementation process is as follows: the preheating current is 11-15 mA; the preheating scanning speed is 10-20 m/s, the preheating scanning times are 15-25 times, the melting current is 11-15 mA, the melting scanning speed is 0.6-0.9 m/s, the bottom layer of the melting end face is of an annular structure, the outer diameter of the tube is 25.4mm, the inner diameter of the tube is 19.4mm, the thickness of the single layer is 40-60 mu m, and the spreading area is 175mm multiplied by 175mm 2 ；
And S5, spreading a layer of molybdenum-rhenium alloy powder obtained in the step S2 on the upper surface of the end surface bottom layer, and repeating the step S4 until the set height is reached to obtain the molybdenum-rhenium tube blank.
The specific implementation process is as follows: the thickness of the single layer is 40-60 mu m, the preheating current is 11-15 mA, the preheating scanning speed is 10-20 m/s, the preheating scanning times are 15-25 times, the melting current is 11-15 mA, the melting scanning speed is 0.6-0.9 m/s, the melting area is the cross section area of the pipe with the outer diameter of 25.4mm and the inner diameter of 19.4mm, the included angle of the adjacent layers in the alloy component in the plane scanning direction is 80-100 degrees, and the total height is 300mm.
S6, performing heat treatment on the molybdenum-rhenium tube blank obtained in the step S5, wherein the heat treatment temperature is 900-1000 ℃ and the time is 30-50 min.
And S7, hot rolling the molybdenum-rhenium tube blank after the heat treatment.
The specific implementation process is as follows: and (3) carrying out hot rolling on the molybdenum-rhenium tube blank subjected to the heat treatment on a two-roll or multi-roll mill, wherein the rolling temperature is 750-850 ℃.
S8, carrying out heat treatment on the molybdenum-rhenium tube blank after hot rolling again, wherein the heat treatment temperature is 850-950 ℃ and the time is 30-40 min, then carrying out hot rolling again, and repeating the steps until the molybdenum-rhenium tube blank reaches the set specification, thus obtaining the molybdenum-rhenium tube.
The number of repetitions of step S8 depends on the diameter of the molybdenum-rhenium tubing required to be obtained, the finer the diameter of the molybdenum-rhenium tubing, the greater the number of repetitions.
Step S9: and carrying out surface treatment on the obtained molybdenum-rhenium pipe to obtain a molybdenum-rhenium finished pipe.
The specific implementation process is as follows: and (3) acid-alkali washing the inner and outer surfaces of the molybdenum-rhenium pipe, and carrying out surface processing on the two ends of the molybdenum-rhenium pipe to obtain a molybdenum-rhenium finished pipe.
The invention discloses a method for preparing a molybdenum-rhenium alloy pipe by using electron beam selective melting technology. Comprising the following steps: preparing molybdenum-rhenium alloy powder with uniform components; screening molybdenum-rhenium alloy powder with set particle size; preheating a substrate of electron beam selective melting manufacturing equipment in a vacuum environment; spreading molybdenum-rhenium alloy powder on the preheated substrate, and preheating and melting to obtain a bottom layer; repeatedly spreading, preheating and melting molybdenum-rhenium alloy powder on the upper surface of the bottom layer to obtain a molybdenum-rhenium tube blank or a tube material; performing heat treatment on the molybdenum-rhenium alloy tube blank or the tube; carrying out hot rolling on the tube blank subjected to the heat treatment on a two-roll or multi-roll mill; carrying out heat treatment on the rolled pipe; acid-alkali washing and end and surface processing are carried out on the tube to obtain a molybdenum-rhenium finished tube; the method can be used for preparing the molybdenum-rhenium alloy pipe. The result is reliable, the repeatability is strong, and the implementation is easy.
The method for preparing the molybdenum-rhenium alloy pipe by using the electron beam selective melting technology improves the yield of the molybdenum-rhenium alloy pipe, compared with the traditional processing method, the method has the advantages that the indexes are obviously improved, the recycled materials can be recycled, the molybdenum-rhenium alloy pipe can be integrally formed, the impurity content of the pipe is low, and the post-processing performance of the molybdenum-rhenium alloy pipe is improved. Therefore, the method has important application prospect for large-scale manufacturing of molybdenum-rhenium alloy.
The above is only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited by this, and any modification made on the basis of the technical scheme according to the technical idea of the present invention falls within the protection scope of the claims of the present invention.
Claims (10)
1. The method for preparing the molybdenum-rhenium alloy pipe by using the electron beam selective melting technology is characterized by comprising the following steps of:
step 1, spreading molybdenum-rhenium alloy powder with set granularity on a substrate layer by layer, and adopting an electron beam selective melting technology to melt layer by layer to obtain a molybdenum-rhenium alloy tube blank;
step 2, performing heat treatment on the obtained molybdenum-rhenium tube blank, and performing hot rolling;
and step 3, repeating the step 2 until the molybdenum-rhenium tube blank reaches the set diameter specification, and obtaining the molybdenum-rhenium alloy tube.
2. The method for preparing the molybdenum-rhenium alloy pipe by using the electron beam selective melting technology as defined in claim 1, wherein the preparation method of the molybdenum-rhenium alloy powder with the particle size set in the step 1 is as follows:
and (3) carrying out powdering treatment on the molybdenum-rhenium alloy section bar, and then screening the obtained molybdenum-rhenium alloy powder to obtain molybdenum-rhenium alloy powder with set granularity.
3. The method for preparing the molybdenum-rhenium alloy pipe by using the electron beam selective melting technology as defined in claim 1, wherein the set granularity of the molybdenum-rhenium alloy powder is 45-105 μm.
4. The method for preparing the molybdenum-rhenium alloy pipe by adopting the electron beam selective melting technology as claimed in claim 1, wherein the method for preparing the molybdenum-rhenium pipe blank by adopting the electron beam selective melting technology in the step 1 is as follows:
spreading a layer of molybdenum-rhenium alloy powder on a preheated substrate, preheating and melting, forming a molybdenum-rhenium alloy tube blank with a certain height on the substrate, spreading a layer of molybdenum-rhenium alloy powder on the obtained molybdenum-rhenium alloy tube blank again, preheating and melting, and repeating the process until the molybdenum-rhenium alloy tube blank reaches a preset height, thus obtaining the molybdenum-rhenium alloy tube blank.
5. The method for preparing molybdenum-rhenium alloy pipe by electron beam selective melting technology according to claim 4, wherein the preheating current is 11-15 mA, the preheating scanning speed is 10-20 m/s, the preheating scanning times are 15-25 times, the melting current is 11-15 mA, the melting scanning speed is 0.6-0.9 m/s, and the included angle of the plane scanning direction of the adjacent layers is 80-100 degrees.
6. A method of preparing a molybdenum-rhenium alloy tube by electron beam selective melting according to claim 1, characterized in that the spread monolayer has a thickness of 40-60 μm.
7. The method for preparing the molybdenum-rhenium alloy pipe by using the electron beam selective melting technology as defined in claim 1, wherein the heat treatment temperature in the step 2 is 900-1000 degrees and the time is 30-50 min.
8. The method for preparing a molybdenum-rhenium alloy pipe by using an electron beam selective melting technique according to claim 1, wherein the hot rolling temperature in the step 2 is 750-850 °.
9. The method for preparing the molybdenum-rhenium alloy pipe by using the electron beam selective melting technology as defined in claim 1, wherein the temperature of the repeated heat treatment in the step 3 is 850-950 ℃ and the time is 30-40 min.
10. The method for preparing the molybdenum-rhenium alloy pipe by using the electron beam selective melting technology as defined in claim 1, wherein the method further comprises the following steps of:
and (3) carrying out surface treatment on the molybdenum-rhenium alloy pipe obtained in the step (3) to obtain a molybdenum-rhenium finished pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310566142.3A CN116511534A (en) | 2023-05-18 | 2023-05-18 | Method for preparing molybdenum-rhenium alloy pipe by electron beam selective melting technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310566142.3A CN116511534A (en) | 2023-05-18 | 2023-05-18 | Method for preparing molybdenum-rhenium alloy pipe by electron beam selective melting technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116511534A true CN116511534A (en) | 2023-08-01 |
Family
ID=87408212
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310566142.3A Pending CN116511534A (en) | 2023-05-18 | 2023-05-18 | Method for preparing molybdenum-rhenium alloy pipe by electron beam selective melting technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116511534A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118046005A (en) * | 2024-04-16 | 2024-05-17 | 北京清研智束科技有限公司 | Molding method of EBSM based molybdenum material |
-
2023
- 2023-05-18 CN CN202310566142.3A patent/CN116511534A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118046005A (en) * | 2024-04-16 | 2024-05-17 | 北京清研智束科技有限公司 | Molding method of EBSM based molybdenum material |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109234601B (en) | High-entropy alloy solid wire for arc cladding and preparation method thereof | |
| US11598008B2 (en) | Methods for manufacturing nanostructured and compositionally-tailored tubes and components by low temperature, solid-state cold spray powder deposition | |
| CN106363187A (en) | Preparation method of high-temperature alloy powder for 3D printing | |
| CN106756717B (en) | Preparation method of high-strength wear-resistant copper-nickel-tin alloy coating | |
| CN102423806A (en) | Preparation method of fine-particle-size cobalt-based alloy powder | |
| CN109971989B (en) | Preparation method of high-conductivity high-temperature-resistant copper alloy | |
| CN111334742B (en) | Method for preparing ceramic composite coating of refractory transition metal compound | |
| CN111235456B (en) | Ternary boride and carbide reinforced metal ceramic powder for laser cladding additive manufacturing, and preparation and application thereof | |
| CN112191857B (en) | Method for preparing iron-based powder by using high-energy-density plasma rotating electrode | |
| CN116511534A (en) | Method for preparing molybdenum-rhenium alloy pipe by electron beam selective melting technology | |
| CN105401116A (en) | Preparation method for titanium alloy TiAl3-Al composite coating | |
| CN114480893A (en) | Method for reducing additive manufacturing cracks of nickel-based superalloy and nickel-based superalloy | |
| CN105803285A (en) | Ultra-fine grain Sc2O3 doped W-based composite material and preparation method thereof | |
| CN112981180B (en) | Preparation method of medium-density ultrahigh-plasticity nickel-tungsten alloy shaped charge liner material | |
| CN111926284B (en) | Steam turbine high-medium pressure inner cylinder steam oxidation resistant coating and preparation method thereof | |
| CN101928909A (en) | Method for preparing niobium titanium aluminum alloy coating by utilizing detonation spraying | |
| CN114990542B (en) | High-entropy alloy-based gradient composite ceramic wear-resistant coating and high-speed laser cladding in-situ preparation method thereof | |
| CN110904446A (en) | Preparation method of titanium-aluminum part | |
| CN113828793B (en) | Rocket engine thrust chamber double-wall structure and manufacturing method thereof | |
| CN115094294A (en) | Self-fluxing high-entropy alloy powder and preparation and application methods thereof | |
| CN114645268A (en) | Method for preparing metal molybdenum coating based on cold spraying high-speed deposition technology | |
| CN113061832A (en) | Nuclear radiation-resistant structural material and preparation method thereof | |
| CN107988508B (en) | Metallurgical method for improving yield of nickel-based metal centrifugal atomization fine powder | |
| CN113102753A (en) | Indirect 3D printing tungsten-based alloy part degreasing sintering method | |
| Jaffee et al. | Fabrication of Tungsten for Solid-propellant Rocket Nozzles |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |