CN112251622B - Production method of stirrer for rare earth doped smelting metal - Google Patents
Production method of stirrer for rare earth doped smelting metal Download PDFInfo
- Publication number
- CN112251622B CN112251622B CN202010978802.5A CN202010978802A CN112251622B CN 112251622 B CN112251622 B CN 112251622B CN 202010978802 A CN202010978802 A CN 202010978802A CN 112251622 B CN112251622 B CN 112251622B
- Authority
- CN
- China
- Prior art keywords
- rare earth
- powder
- stirrer
- blank
- earth oxide
- 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.)
- Active
Links
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 19
- 239000002184 metal Substances 0.000 title claims abstract description 19
- 229910052761 rare earth metal Inorganic materials 0.000 title claims abstract description 12
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 11
- 238000003723 Smelting Methods 0.000 title claims abstract description 10
- 150000002910 rare earth metals Chemical class 0.000 title claims abstract description 9
- 229910001404 rare earth metal oxide Inorganic materials 0.000 claims abstract description 30
- 239000000843 powder Substances 0.000 claims abstract description 22
- 239000011812 mixed powder Substances 0.000 claims abstract description 12
- 238000005245 sintering Methods 0.000 claims abstract description 11
- 238000003825 pressing Methods 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 9
- 238000002156 mixing Methods 0.000 claims abstract description 9
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 8
- 239000000956 alloy Substances 0.000 claims abstract description 8
- 238000003754 machining Methods 0.000 claims abstract description 8
- 239000000203 mixture Substances 0.000 claims abstract description 7
- 230000008569 process Effects 0.000 claims abstract description 7
- 238000007873 sieving Methods 0.000 claims abstract description 7
- 238000005242 forging Methods 0.000 claims abstract description 6
- 238000012856 packing Methods 0.000 claims abstract description 4
- 238000007789 sealing Methods 0.000 claims abstract description 4
- 238000011049 filling Methods 0.000 claims abstract description 3
- 239000003607 modifier Substances 0.000 claims description 10
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 9
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 9
- 238000002791 soaking Methods 0.000 claims description 8
- 238000001354 calcination Methods 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 4
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 4
- 238000002715 modification method Methods 0.000 claims description 4
- MRELNEQAGSRDBK-UHFFFAOYSA-N lanthanum oxide Inorganic materials [O-2].[O-2].[O-2].[La+3].[La+3] MRELNEQAGSRDBK-UHFFFAOYSA-N 0.000 claims description 3
- 238000004108 freeze drying Methods 0.000 claims description 2
- 238000001953 recrystallisation Methods 0.000 abstract description 5
- 229910001182 Mo alloy Inorganic materials 0.000 abstract description 3
- MGRWKWACZDFZJT-UHFFFAOYSA-N molybdenum tungsten Chemical compound [Mo].[W] MGRWKWACZDFZJT-UHFFFAOYSA-N 0.000 abstract description 3
- 238000003756 stirring Methods 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 3
- 229910052750 molybdenum Inorganic materials 0.000 description 3
- 239000011733 molybdenum Substances 0.000 description 3
- 229910052721 tungsten Inorganic materials 0.000 description 3
- 239000010937 tungsten Substances 0.000 description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/05—Mixtures of metal powder with non-metallic powder
-
- B22F1/0003—
-
- 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
- B22F3/02—Compacting only
- B22F3/04—Compacting only by applying fluid pressure, e.g. by cold isostatic pressing [CIP]
-
- 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
- B22F3/10—Sintering only
- B22F3/1003—Use of special medium during sintering, e.g. sintering aid
- B22F3/1007—Atmosphere
-
- 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
- B22F3/17—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by forging
-
- 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
- B22F3/24—After-treatment of workpieces or articles
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C27/00—Alloys based on rhenium or a refractory metal not mentioned in groups C22C14/00 or C22C16/00
- C22C27/04—Alloys based on tungsten or molybdenum
-
- 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
- B22F3/24—After-treatment of workpieces or articles
- B22F2003/247—Removing material: carving, cleaning, grinding, hobbing, honing, lapping, polishing, milling, shaving, skiving, turning the surface
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Powder Metallurgy (AREA)
Abstract
The invention discloses a production method of a stirrer for rare earth doped smelting metal, which comprises the following steps: step one, mixing metal powder and rare earth oxide powder, and filling the mixture into a mixer for mixing for 36 hours to obtain mixed powder; step two, taking out the mixed powder, and placing the mixed powder on a 200-mesh sieve for sieving treatment to obtain alloy powder which is uniformly mixed and stirred; step three, loosely packing the alloy powder through a rubber sleeve, sealing, and pressing under cold isostatic pressure to obtain a pressed blank; step four, placing the pressed blank into a vacuum sintering furnace for sintering to obtain a sintered blank, and step five, forging the sintered blank; and step six, the forged blank enters a machining workshop, machining is carried out until a finished product is obtained and inspected, the addition of the rare earth element can improve the recrystallization temperature of the tungsten-molybdenum alloy by 200-300 ℃, the service life of the prepared stirrer is prolonged by more than 15%, and the phenomenon of fracture in the stirring process is reduced.
Description
Technical Field
The invention relates to the technical field of stirrer manufacturing, in particular to a production method of a stirrer for rare earth doped smelting metal.
Background
The stirrer is mainly used for smelting zinc and other elements, but in the preparation process of smelting zinc and other elements, solid-liquid mixing and stirring are basically realized in a high-acid and high-corrosion environment, so the quality problem of the stirrer is particularly important, and long-term statistics shows that most of the damage modes of the stirrer are broken because the stirrer is used for a long time, the internal recrystallization phenomenon occurs, the mechanical properties of tungsten and molybdenum materials are poor after recrystallization, and the breakage phenomenon can occur under the action of slight stress.
Disclosure of Invention
In order to solve the problems, the invention provides a production method of a stirrer for rare earth doped smelting metal.
The invention is realized by the following technical scheme:
a production method of a stirrer for rare earth doped smelting metal comprises the following steps:
step one, mixing the selected metal powder and the rare earth oxide powder, and filling the mixture into a mixer for mixing for 36 hours to obtain mixed powder;
step two, taking out the mixed powder, and placing the mixed powder on a 200-mesh sieve for sieving treatment, wherein the sieving times are 5-10 times, so as to obtain alloy powder which is uniformly mixed and stirred;
step three, loosely packing the alloy powder through a rubber sleeve, sealing, and pressing under cold isostatic pressure, wherein the pressing pressure is 200Mpa, the pressing time is 30min, and the pressure is maintained for 30min to obtain a pressed blank;
step four, placing the pressed blank into a vacuum sintering furnace, sintering at 2500 ℃ and preserving heat for 8 hours to obtain a sintered blank, wherein the vacuum degree in the sintering process is 1.0E-3pa；
Step five, forging the sintered blank, wherein the preheating temperature is 1300 ℃;
and step six, enabling the forged blank to enter a machining workshop, and performing machining treatment until a finished product is obtained and is inspected.
Further, in the first step, the metal powder is any one of 99.3-99.6 parts of tungsten powder, molybdenum powder and a mixture of tungsten powder and molybdenum powder.
Further, in the step one, the rare earth oxide is 0.5-0.7 parts of La2O3Or 0.4 to 2 parts of Y2O3And (3) powder.
Further, the rare earth oxide is a modified rare earth oxide, and the modification method comprises the following steps: calcining the rare earth oxide at 450-540 ℃ for 30-35 min, adding the calcined rare earth oxide into a modifier, soaking for 4-5 h, cleaning and drying after soaking, wherein the modifier is prepared from a silane coupling agent and absolute ethyl alcohol.
Further, the drying is freeze drying.
Further, the blender mixer is a V-shaped blender mixer.
The invention has the beneficial effects that:
(1) the addition of rare earth elements into the prepared stirrer can improve the recrystallization temperature of the tungsten-molybdenum alloy by 200-300 ℃, prolong the service life by more than 15 percent and save rare metal resources;
(2) the rare earth oxide is modified, and the modification method comprises the following steps: calcining the rare earth oxide at 450-540 ℃ for 30-35 min, adding the calcined rare earth oxide into a modifier, soaking for 4-5 h, cleaning and drying, wherein the modifier is prepared from a silane coupling agent and absolute ethyl alcohol, calcining the rare earth oxide to remove impurities in the rare earth oxide, and adding the calcined rare earth oxide into the modifier for soaking, so that the particle size of the rare earth oxide is reduced, and the surface activity of the rare earth oxide is improved;
(3) the process method is simple, does not need additional investment in equipment, and saves the cost.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below.
A production method of a stirrer for rare earth doped smelting metal comprises the following steps:
step one, mixing the selected metal powder and the rare earth oxide powder, and putting the mixture into a V-shaped mixer for mixing for 36 hours to obtain mixed powder; the metal powder is tungsten powder or molybdenum powder or a mixture of tungsten powder and molybdenum powder, and the rare earth oxide is La2O3Or Y2O3Powder, when 99.3-99.5 parts of tungsten or molybdenum is selected, 0.5-0.7 part of La is selected2O3When 98-99.6% of tungsten or molybdenum is selected, 0.4-2 parts of Y is selected2O3；
Step two, taking out the mixed powder, and placing the mixed powder on a 200-mesh sieve for sieving treatment, wherein the sieving times are 5-10 times, so as to obtain alloy powder which is uniformly mixed and stirred;
step three, loosely packing the alloy powder through a rubber sleeve, sealing, and pressing under cold isostatic pressure, wherein the pressing pressure is 200Mpa, the pressing time is 30min, and the pressure is maintained for 30min to obtain a pressed blank;
step four, placing the pressed blank into a vacuum sintering furnace, sintering at 2500 ℃ and preserving heat for 8 hours to obtain a sintered blank, wherein the vacuum degree in the sintering process is 1.0E-3pa；
Fifthly, forging the sintered blank at the preheating temperature of 1300 ℃, wherein in the forging process, the metallographic structure in the forged material needs to be controlled by improving the forging deformation amount so as to obtain a stable material;
and step six, enabling the forged blank to enter a machining workshop, and performing machining treatment until a finished product is obtained and is inspected.
The rare earth oxide is modified, and the modification method comprises the following steps: calcining the rare earth oxide at 450-540 ℃ for 30-35 min, adding the calcined rare earth oxide into a modifier, soaking for 4-5 h, cleaning, freezing and drying, wherein the modifier is prepared from a silane coupling agent and absolute ethyl alcohol, calcining the rare earth oxide to remove impurities in the rare earth oxide, and adding the calcined rare earth oxide into the modifier for soaking, so that the particle size of the rare earth oxide is reduced, and the surface activity of the rare earth oxide is improved;
according to the invention, the addition of rare earth elements can improve the recrystallization temperature of the tungsten-molybdenum alloy by 200-300 ℃, the service life of the prepared stirrer is prolonged by more than 15%, the phenomenon of fracture in the stirring process is reduced, and meanwhile, rare metal resources are saved.
While there have been shown and described what are at present considered the fundamental principles of the invention, its essential features and advantages, it will be understood by those skilled in the art that the invention is not limited by the embodiments described above, which are merely illustrative of the principles of the invention, but various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents.
Claims (3)
1. A production method of a stirrer for rare earth doping smelting metal is characterized by comprising the following steps: the method comprises the following steps:
step one, mixing the selected metal powder and the rare earth oxide powder, and filling the mixture into a mixer for mixing for 36 hours to obtain mixed powder; the rare earth oxide is modified, and the modification method comprises the following steps: calcining the rare earth oxide at 450-540 ℃ for 30-35 min, adding the calcined rare earth oxide into a modifier, soaking for 4-5 h, cleaning and drying after soaking, thereby obtaining the rare earth oxideThe modifier is prepared from a silane coupling agent and absolute ethyl alcohol, the metal powder is any one of 99.3-99.6 parts of tungsten powder, molybdenum powder and a mixture of tungsten powder and molybdenum powder, and the rare earth oxide is 0.5-0.7 part of La2O3Or 0.4 to 2 parts of Y2O3Powder;
step two, taking out the mixed powder, and placing the mixed powder on a 200-mesh sieve for sieving treatment, wherein the sieving times are 5-10 times, so as to obtain alloy powder which is uniformly mixed and stirred;
step three, loosely packing the alloy powder through a rubber sleeve, sealing, and pressing under cold isostatic pressure, wherein the pressing pressure is 200Mpa, the pressing time is 30min, and the pressure is maintained for 30min to obtain a pressed blank;
step four, placing the pressed blank into a vacuum sintering furnace, sintering at 2500 ℃ and preserving heat for 8 hours to obtain a sintered blank, wherein the vacuum degree in the sintering process is 1.0E-3pa；
Step five, forging the sintered blank, wherein the preheating temperature is 1300 ℃;
and step six, enabling the forged blank to enter a machining workshop, and performing machining treatment until a finished product is obtained and is inspected.
2. The method for producing a stirrer for rare earth-doped metallurgical metal according to claim 1, wherein: the drying is freeze drying.
3. The method for producing a stirrer for rare earth-doped metallurgical metal according to claim 1, wherein: the blendor is V type blendor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010978802.5A CN112251622B (en) | 2020-09-17 | 2020-09-17 | Production method of stirrer for rare earth doped smelting metal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010978802.5A CN112251622B (en) | 2020-09-17 | 2020-09-17 | Production method of stirrer for rare earth doped smelting metal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112251622A CN112251622A (en) | 2021-01-22 |
| CN112251622B true CN112251622B (en) | 2022-03-18 |
Family
ID=74231622
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010978802.5A Active CN112251622B (en) | 2020-09-17 | 2020-09-17 | Production method of stirrer for rare earth doped smelting metal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112251622B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114231775B (en) * | 2021-12-21 | 2022-06-28 | 厦门欧斯拓科技有限公司 | Preparation method of rare earth composite material |
| CN114657481B (en) * | 2022-03-08 | 2023-03-24 | 厦门欧斯拓科技有限公司 | Preparation method of rare earth composite material |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0754092A (en) * | 1993-08-11 | 1995-02-28 | Tokyo Tungsten Co Ltd | Electrode for heating and pressure welding |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3472882B2 (en) * | 1993-06-10 | 2003-12-02 | 株式会社アライドマテリアル | Oxide dispersion type alloy and method for producing the same |
| JPH08104942A (en) * | 1994-10-06 | 1996-04-23 | Toshiba Corp | High strength and high corrosion resistance material |
| CN102605228A (en) * | 2012-03-23 | 2012-07-25 | 德州市华业钨钼材料有限公司 | Novel high-consumption resistant multi-element rare earth tungsten electrode and preparation method thereof |
| CN105518169B (en) * | 2014-10-20 | 2017-09-12 | 中南大学 | A kind of preparation method of rare earth oxide dispersion-strengtherning fine grain tungsten material |
| CN107009093B (en) * | 2017-01-12 | 2019-01-29 | 厦门虹鹭钨钼工业有限公司 | A kind of production method of rear-earth-doped tungsten pipe |
| CN111041314B (en) * | 2019-11-27 | 2021-05-11 | 洛阳爱科麦钨钼科技股份有限公司 | High-strength molybdenum alloy rod and preparation method thereof |
-
2020
- 2020-09-17 CN CN202010978802.5A patent/CN112251622B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0754092A (en) * | 1993-08-11 | 1995-02-28 | Tokyo Tungsten Co Ltd | Electrode for heating and pressure welding |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112251622A (en) | 2021-01-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112251622B (en) | Production method of stirrer for rare earth doped smelting metal | |
| CN110106418B (en) | Rare earth molybdenum tungsten alloy for cutting wire and preparation method thereof | |
| CN113735568A (en) | Preparation method of ITO ceramic target material | |
| JP3917208B2 (en) | Tungsten-molybdenum alloy crucible and method for producing the same | |
| CN110788318B (en) | Preparation method of high-density rare earth tungsten electrode | |
| CN114029484B (en) | Preparation method of tantalum-titanium alloy target | |
| CN109940158B (en) | Rapid preparation process of fine-grain molybdenum plate | |
| CN114790524A (en) | High-fracture toughness Ti 2 Preparation process of AlNb-based alloy forged piece | |
| CN112981265A (en) | Carbon-free high-speed steel and preparation method thereof | |
| CN106222478A (en) | A kind of ternary-alloy sealing material and preparation method thereof | |
| CN112620641A (en) | Silver tin oxide electric contact material and manufacturing method thereof | |
| CN111560551B (en) | Preparation method of high-compactness special-shaped molybdenum-based composite material part | |
| CN110066952B (en) | Preparation method of zirconium oxide reinforced molybdenum alloy bar | |
| CN116813342A (en) | Preparation method of high-density molybdenum tantalum oxide target | |
| CN107914016B (en) | Production method of molybdenum strip | |
| CN110777343A (en) | Preparation method of molybdenum planar sputtering target | |
| CN113773083B (en) | Bismuth telluride-based material with high strength and high thermoelectric property and preparation method thereof | |
| KR101500657B1 (en) | Method of preparing the Nickel-Aluminum alloy powder in low temperature | |
| CN112279518A (en) | Low-temperature sintered microcrystalline glass bonding agent for diamond grinding wheel and preparation method and application thereof | |
| CN113045295A (en) | High-strength ceramic sectional material and preparation method thereof | |
| CN112404427A (en) | Method for directly forging and forming thick plate blank by TiAl alloy powder at high temperature | |
| CN112144023A (en) | Preparation method of high-density osmium target material | |
| CN115652127B (en) | Nearly equiaxial grain Mo 2 FeB 2 Preparation method of base metal ceramic | |
| CN110253460B (en) | High-temperature-resistant grinding wear-resistant diamond grinding block and preparation method thereof | |
| CN113857400B (en) | Coating for TC18 titanium alloy hot die forging, heat-insulating composite material and preparation method thereof |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |