CN110961630A - Method for regulating dendritic crystal morphology of Al-Si alloy - Google Patents
Method for regulating dendritic crystal morphology of Al-Si alloy Download PDFInfo
- Publication number
- CN110961630A CN110961630A CN201911355558.0A CN201911355558A CN110961630A CN 110961630 A CN110961630 A CN 110961630A CN 201911355558 A CN201911355558 A CN 201911355558A CN 110961630 A CN110961630 A CN 110961630A
- Authority
- CN
- China
- Prior art keywords
- alloy
- laser
- equal
- molten pool
- dendritic crystal
- 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.)
- Granted
Links
Images
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
-
- 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
- B22F10/30—Process control
- B22F10/36—Process control of energy beam parameters
-
- 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
- B22F10/30—Process control
- B22F10/38—Process control to achieve specific product aspects, e.g. surface smoothness, density, porosity or hollow structures
-
- 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
- B22F12/90—Means for process control, e.g. cameras or sensors
-
- 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
- B33Y50/00—Data acquisition or data processing for additive manufacturing
-
- 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
- B22F12/40—Radiation means
- B22F12/41—Radiation means characterised by the type, e.g. laser or electron beam
- B22F12/43—Radiation means characterised by the type, e.g. laser or electron beam pulsed; frequency modulated
-
- 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)
- Automation & Control Theory (AREA)
- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
Abstract
According to the method, the instantaneous temperature of the molten pool in the laser additive forming process of the Al-Si alloy is measured and the curve is analyzed, the average value Tav of the maximum value Tmax, the minimum value Tmin and the difference between the maximum value and the minimum value of the instantaneous temperature change curve of the molten pool and the average cooling rate ξ of the cooling stage of the molten pool in a single pulse period are calculated according to the instantaneous temperature change curve of the molten pool, the laser additive forming parameters of the Al-Si alloy are optimized, and the process parameters for obtaining the columnar dendritic crystal and the process parameters for obtaining the equiaxed dendritic crystal are obtained finally, so that the morphology of the dendritic crystal of the Al-Si alloy is regulated and controlled, and the mechanical property of a formed part can be effectively improved.
Description
Technical Field
The invention belongs to the field of metal additive manufacturing, and particularly relates to a method for regulating and controlling the dendritic crystal morphology of an Al-Si alloy.
Background
The laser additive manufacturing technology is based on the principle of 'dispersion-accumulation', metal powder is melted and rapidly solidified through high-energy beam laser, and direct forming of high-performance complex metal parts is achieved through a way of channel-by-channel tower-by-layer accumulation, so that the laser additive manufacturing technology has extremely wide application prospects in the fields of aerospace, automobiles, biomedical treatment and the like. The aluminum alloy has low density, high specific strength, good plasticity, excellent electrical conductivity, thermal conductivity and corrosion resistance, is a nonferrous metal material which is most widely applied to industry and is widely applied to aviation, aerospace, automobiles, ships and mechanical manufacturing. The laser additive manufacturing technology is adopted to form the small-batch aerospace aluminum alloy complex parts, so that the material utilization rate is effectively improved, the manufacturing period is shortened, and the cost is reduced. In addition, the high cooling rate in the laser additive manufacturing process is beneficial to refining the solidification structure and improving the mechanical property.
Research has shown that laser additive manufacturing of aluminium alloys has the following characteristics: in the forming process, metallurgical defects such as spheroidization, oxidation, non-fusion, pores, microcracks and the like are easily generated; the macro structure is mainly thick columnar crystals grown in an epitaxial way, the micro structure is in a fine columnar dendritic crystal or cell crystal form state, and a precipitated phase is formed between the dendritic crystals along with chain eutectic; due to the effect of cyclic deposition and reheating, the structure is locally coarsened between layers and among tracks, and a layer belt structure along with a scanning track is formed; the as-deposited properties of the formed part are higher than those of conventional die cast parts. Compared with other alloy systems (such as titanium alloy, nickel-based alloy, high-strength steel and the like), the aluminum alloy forming process has the characteristics of narrow window and low maturity, and is mainly related to the characteristics of low melting point, high laser reflectivity, large heat conductivity coefficient, poor powder fluidity, easiness in oxidation and the like of the aluminum alloy.
The Al-Si system alloy is a typical cast aluminum alloy. The laser additive manufacturing of Al-Si series alloy is generally concerned by scholars at home and abroad. The Al Si12 alloy was formed by Dydonghua et Al using a laser additive manufacturing technique, and the results showed that the tensile strength, yield strength and elongation of the alloy were 476.3MPa, 315.5MPa and 6.7%, respectively. Takahiro et Al studied the influence of mechanical properties of Al-xSi binary alloy manufactured by Si content laser additive manufacturing, and found that as the Si content increases, more Si obstructs dislocation movement, the tensile strength and yield strength of the alloy increase, and the elongation rate decreases. Wang et Al studied the microstructure and mechanical properties of Al-3.5Cu-1.5Mg-1Si alloy produced by laser additive manufacturing, found that the yield strength, tensile strength and elongation of the alloy sample were 223 + -4 MPa, 366 + -7 MPa and 5.3 + -0.3%, respectively, and after T6 heat treatment, the alloy yield strength and tensile strength were further improved to 368 + -6 MPa and 455 + -10 MPa. Although the researchers mentioned above have conducted a lot of research on Al-Si alloys and provide good insights and theoretical bases for the texture and performance control of Al-Si alloys manufactured by additive manufacturing, there is still no effective method for effectively controlling the dendrite morphology of Al-Si alloys manufactured by laser additive manufacturing, which limits further industrial applications of Al-Si alloys manufactured by laser additive manufacturing.
Disclosure of Invention
The invention provides a method for regulating and controlling dendrite morphology of Al-Si alloy, which can effectively regulate and control dendrite morphology of Al-Si alloy.
In order to achieve the above purpose, the following technical scheme is adopted in the application.
A dendritic crystal morphology regulation method for an Al-Si alloy comprises the following steps:
(1) setting main parameters of a laser additive manufacturing process, wherein the laser peak power P is 700-1000W, the scanning speed V is 6-14 mm/s, and the spot diameter D is 1.0-3.0 mm;
(2) carrying out laser additive forming on the Al-Si alloy by adopting the parameters set in the step (1), and recording the instantaneous temperature change of a molten pool of the Al-Si alloy in the laser additive forming process to obtain an instantaneous temperature change curve of the molten pool;
(3) calculating a maximum value Tmax, a minimum value Tmin, an average value Tav of the difference between the maximum value and the minimum value of the instantaneous temperature change curve of the molten pool and an average cooling rate ξ of the cooling stage of the molten pool in a single pulse period according to the instantaneous temperature change curve of the molten pool obtained in the step (2);
(4) repeating the step (2) and the step (3) for 2 to 3 times, and obtaining a columnar dendritic crystal according to an instantaneous temperature change curve of a molten pool obtained each time, wherein when the Tmax is more than or equal to 2.2Tm and less than or equal to 3.2Tm, the Tav is more than or equal to 600 ℃, and the ξ is more than or equal to 3.5 multiplied by 103 ℃/s, a columnar dendritic crystal is obtained, and when the Tmax is more than or equal to 3.2Tm, the Tav is more than or equal to 400 ℃ and less than or equal to 600 ℃, the Tav is more than or equal to 3.5 multiplied by 103 ℃/s is more than or equal to ξ and less than or equal to 5.;
(5) according to the data information obtained in the step (4), one-step optimization of laser additive forming process parameters is carried out, and the main process parameters for obtaining the morphology of the columnar dendritic crystal are as follows: adopting continuous laser, wherein the laser power is 600-1000W, the laser scanning speed is 6-12 mm/s, and the laser spot diameter is 1-2 mm; the main process parameters for obtaining the equiaxed dendritic crystal morphology are as follows: the laser waveform is square wave, the laser peak power is 750-900W, the pulse frequency is 50 Hz-10 Hz, the duty ratio is 0.5-0.9, the scanning speed is 8-12 mm/s, the powder feeding amount is 10-18 g/min, and the spot diameter is 1.5-2 mm;
(6) and (5) selecting corresponding process parameters in the step (5) according to the dendritic crystal morphology required by the part to perform Al-Si series alloy additive manufacturing.
Further, in the step (2), a colorimetric pyrometer is adopted to record the instantaneous temperature change of the molten pool of the Al-Si series alloy in the laser additive forming process.
Further, the emissivity of the colorimetric pyrometer used was 1.05, the spot size was 1.0mm, and the single data acquisition time was 1 ms.
Further, in the step (6), corresponding process parameters in the step (5) are selected according to the dendritic crystal morphology required by the part, and an Al-Si series alloy additive manufacturing is performed by adopting a unidirectional scanning path.
The method has the beneficial effects that through measurement and curve analysis of the instantaneous temperature of the molten pool in the laser additive forming process of the Al-Si alloy, the average value Tav of the maximum value Tmax, the minimum value Tmin, the difference between the maximum value and the minimum value of the instantaneous temperature change curve of the molten pool and the average cooling rate ξ of the cooling stage of the molten pool in a single pulse period are calculated according to the instantaneous temperature change curve of the molten pool, the laser additive forming parameters of the Al-Si alloy are optimized, and the process parameters for obtaining the columnar dendritic crystal and the process parameters for obtaining the equiaxed dendritic crystal are finally obtained, so that the regulation and control of the morphology of the dendritic crystal of the Al-Si alloy are realized, and the mechanical property of a formed part can be effectively improved.
Drawings
FIG. 1 is a metallographic image of a laser additive manufacturing sample of the Al-Si alloy obtained in example 1;
fig. 2 is a gold phase diagram of an Al — Si alloy laser additive manufacturing sample obtained by a conventional method.
Detailed Description
Example 1
A dendritic crystal morphology regulation method for an Al-Si alloy comprises the following steps:
(1) setting main parameters of a laser additive manufacturing process, wherein the laser peak power P is 700-1000W, the scanning speed V is 6-14 mm/s, and the spot diameter D is 1.0-3.0 mm;
(2) carrying out laser additive forming on the Al-Si alloy by adopting the parameters set in the step (1), and recording the instantaneous temperature change of a molten pool of the Al-Si alloy in the laser additive forming process to obtain an instantaneous temperature change curve of the molten pool;
(3) calculating a maximum value Tmax, a minimum value Tmin, an average value Tav of the difference between the maximum value and the minimum value of the instantaneous temperature change curve of the molten pool and an average cooling rate ξ of the cooling stage of the molten pool in a single pulse period according to the instantaneous temperature change curve of the molten pool obtained in the step (2);
(4) repeating the step (2) and the step (3) for 2 to 3 times, and obtaining a columnar dendritic crystal according to an instantaneous temperature change curve of a molten pool obtained each time, wherein when the Tmax is more than or equal to 2.2Tm and less than or equal to 3.2Tm, the Tav is more than or equal to 600 ℃, and the ξ is more than or equal to 3.5 multiplied by 103 ℃/s, a columnar dendritic crystal is obtained, and when the Tmax is more than or equal to 3.2Tm, the Tav is more than or equal to 400 ℃ and less than or equal to 600 ℃, the Tav is more than or equal to 3.5 multiplied by 103 ℃/s is more than or equal to ξ and less than or equal to 5.;
(5) according to the data information obtained in the step (4), one-step optimization of laser additive forming process parameters is carried out, and the main process parameters for obtaining the morphology of the columnar dendritic crystal are as follows: adopting continuous laser, wherein the laser power is 600-1000W, the laser scanning speed is 6-12 mm/s, and the laser spot diameter is 1-2 mm; the main process parameters for obtaining the equiaxed dendritic crystal morphology are as follows: the laser waveform is square wave, the laser peak power is 750-900W, the pulse frequency is 50 Hz-10 Hz, the duty ratio is 0.5-0.9, the scanning speed is 8-12 mm/s, the powder feeding amount is 10-18 g/min, and the spot diameter is 1.5-2 mm;
(6) and (5) selecting corresponding process parameters in the step (5) according to the dendritic crystal morphology required by the part to perform Al-Si series alloy additive manufacturing.
Further, in the step (2), a colorimetric pyrometer is adopted to record the instantaneous temperature change of the molten pool of the Al-Si series alloy in the laser additive forming process.
Further, the emissivity of the colorimetric pyrometer used was 1.05, the spot size was 1.0mm, and the single data acquisition time was 1 ms.
Further, in the step (6), corresponding process parameters in the step (5) are selected according to the dendritic crystal morphology required by the part, and an Al-Si series alloy additive manufacturing is performed by adopting a unidirectional scanning path.
When the laser waveform is square wave, on one hand, the heat input of the molten pool is reduced, the cooling rate of the molten pool is improved (ξ can reach 105-106 ℃/s), the supercooling degree and the nucleation rate of the molten pool are improved, and the size of dendrite is further refined.
The method is mainly characterized in that under the action of continuous laser, a molten pool is in a quasi-steady state translational solidification mode along with the movement of laser, the molten pool has high temperature gradient, and the cooling rate is relatively slow (ξ is in the order of 103 ℃/s), so that relatively coarse columnar dendrites are formed.
By comparison, the method can effectively refine the dendritic crystal size, obtain a fine equiaxial dendritic crystal structure and improve the mechanical property of the Al-Si alloy.
Claims (4)
1. A dendritic crystal morphology regulation method for an Al-Si alloy is characterized by comprising the following steps:
(1) setting main parameters of a laser additive manufacturing process, wherein the laser peak power P is 700-1000W, the scanning speed V is 6-14 mm/s, and the spot diameter D is 1.0-3.0 mm;
(2) carrying out laser additive forming on the Al-Si alloy by adopting the parameters set in the step (1), and recording the instantaneous temperature change of a molten pool of the Al-Si alloy in the laser additive forming process to obtain an instantaneous temperature change curve of the molten pool;
(3) calculating a maximum value Tmax, a minimum value Tmin, an average value Tav of the difference between the maximum value and the minimum value of the instantaneous temperature change curve of the molten pool and an average cooling rate ξ of the cooling stage of the molten pool in a single pulse period according to the instantaneous temperature change curve of the molten pool obtained in the step (2);
(4) repeating the step (2) and the step (3) for 2 to 3 times, and obtaining a columnar dendritic crystal according to an instantaneous temperature change curve of a molten pool obtained each time, wherein when the Tmax is more than or equal to 2.2Tm and less than or equal to 3.2Tm, the Tav is more than or equal to 600 ℃, and the ξ is more than or equal to 3.5 multiplied by 103 ℃/s, a columnar dendritic crystal is obtained, and when the Tmax is more than or equal to 3.2Tm, the Tav is more than or equal to 400 ℃ and less than or equal to 600 ℃, the Tav is more than or equal to 3.5 multiplied by 103 ℃/s is more than or equal to ξ and less than or equal to 5.;
(5) according to the data information obtained in the step (4), one-step optimization of laser additive forming process parameters is carried out, and the main process parameters for obtaining the morphology of the columnar dendritic crystal are as follows: adopting continuous laser, wherein the laser power is 600-1000W, the laser scanning speed is 6-12 mm/s, and the laser spot diameter is 1-2 mm; the main process parameters for obtaining the equiaxed dendritic crystal morphology are as follows: the laser waveform is square wave, the laser peak power is 750-900W, the pulse frequency is 50 Hz-10 Hz, the duty ratio is 0.5-0.9, the scanning speed is 8-12 mm/s, the powder feeding amount is 10-18 g/min, and the spot diameter is 1.5-2 mm;
(6) and (5) selecting corresponding process parameters in the step (5) according to the dendritic crystal morphology required by the part to perform Al-Si series alloy additive manufacturing.
2. The method for regulating the dendritic morphology of the Al-Si system alloy according to claim 1, wherein in the step (2), a colorimetric pyrometer is used for recording the instantaneous temperature change of a molten pool of the Al-Si system alloy in the laser additive forming process.
3. The method for regulating the dendritic morphology of the Al-Si system alloy according to claim 2, wherein the emissivity of a colorimetric pyrometer is 1.05, the spot size is 1.0mm, and the single data acquisition time is 1 ms.
4. The method for regulating the dendritic morphology of the Al-Si alloy according to claim 1, wherein in the step (6), corresponding process parameters in the step (5) are selected according to the dendritic morphology required by the part, and an Al-Si alloy additive manufacturing process is performed by adopting a unidirectional scanning path.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911355558.0A CN110961630B (en) | 2019-12-25 | 2019-12-25 | Method for regulating dendritic crystal morphology of Al-Si alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911355558.0A CN110961630B (en) | 2019-12-25 | 2019-12-25 | Method for regulating dendritic crystal morphology of Al-Si alloy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110961630A true CN110961630A (en) | 2020-04-07 |
| CN110961630B CN110961630B (en) | 2021-11-09 |
Family
ID=70036411
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911355558.0A Active CN110961630B (en) | 2019-12-25 | 2019-12-25 | Method for regulating dendritic crystal morphology of Al-Si alloy |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110961630B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111965171A (en) * | 2020-07-22 | 2020-11-20 | 江苏大学 | Method for preparing functionally graded material based on closed-loop joint measurement and control system |
| CN112658281A (en) * | 2020-12-23 | 2021-04-16 | 湖南大学 | Method for improving internal quality of high-entropy alloy manufactured by laser additive manufacturing |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016013495A1 (en) * | 2014-07-23 | 2016-01-28 | 株式会社日立製作所 | Alloy structure and manufacturing method of alloy structure |
| CN106077647A (en) * | 2016-07-27 | 2016-11-09 | 湖南大学 | A kind of laser gain material controls the method for fragility Laves phase during manufacturing nickel base superalloy |
| CN107790717A (en) * | 2017-11-05 | 2018-03-13 | 湖南大学 | A kind of quasi-continuous lasing metal 3D printing method for realizing the regulation and control of nickel-base alloy crystallographic texture |
| CN107876762A (en) * | 2017-11-05 | 2018-04-06 | 湖南大学 | A kind of laser metal 3D printing method for realizing Ni-based function part local solidification tissue customization |
| CN108480640A (en) * | 2018-06-15 | 2018-09-04 | 长沙理工大学 | A method of realizing laser gain material manufacture titanium alloy beta crystal grain regulation and control |
| CN108754373A (en) * | 2018-06-15 | 2018-11-06 | 湖南大学 | A kind of pulse laser surface melting method for realizing the regulation and control of titanium alloy surface grain form |
| CN109261964A (en) * | 2018-10-30 | 2019-01-25 | 首都航天机械有限公司 | A kind of titanium alloy structure part and its Laser Melting Deposition manufacturing process |
| CN110076418A (en) * | 2019-05-22 | 2019-08-02 | 河北科技大学 | A kind of tissue crystal fining method carrying out electric arc increasing material manufacturing using alusil alloy |
-
2019
- 2019-12-25 CN CN201911355558.0A patent/CN110961630B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016013495A1 (en) * | 2014-07-23 | 2016-01-28 | 株式会社日立製作所 | Alloy structure and manufacturing method of alloy structure |
| CN106077647A (en) * | 2016-07-27 | 2016-11-09 | 湖南大学 | A kind of laser gain material controls the method for fragility Laves phase during manufacturing nickel base superalloy |
| CN107790717A (en) * | 2017-11-05 | 2018-03-13 | 湖南大学 | A kind of quasi-continuous lasing metal 3D printing method for realizing the regulation and control of nickel-base alloy crystallographic texture |
| CN107876762A (en) * | 2017-11-05 | 2018-04-06 | 湖南大学 | A kind of laser metal 3D printing method for realizing Ni-based function part local solidification tissue customization |
| CN108480640A (en) * | 2018-06-15 | 2018-09-04 | 长沙理工大学 | A method of realizing laser gain material manufacture titanium alloy beta crystal grain regulation and control |
| CN108754373A (en) * | 2018-06-15 | 2018-11-06 | 湖南大学 | A kind of pulse laser surface melting method for realizing the regulation and control of titanium alloy surface grain form |
| CN109261964A (en) * | 2018-10-30 | 2019-01-25 | 首都航天机械有限公司 | A kind of titanium alloy structure part and its Laser Melting Deposition manufacturing process |
| CN110076418A (en) * | 2019-05-22 | 2019-08-02 | 河北科技大学 | A kind of tissue crystal fining method carrying out electric arc increasing material manufacturing using alusil alloy |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111965171A (en) * | 2020-07-22 | 2020-11-20 | 江苏大学 | Method for preparing functionally graded material based on closed-loop joint measurement and control system |
| CN112658281A (en) * | 2020-12-23 | 2021-04-16 | 湖南大学 | Method for improving internal quality of high-entropy alloy manufactured by laser additive manufacturing |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110961630B (en) | 2021-11-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108754373B (en) | Method for realizing regulation and control of crystal grain form on surface of titanium alloy | |
| Li et al. | Reducing arc heat input and obtaining equiaxed grains by hot-wire method during arc additive manufacturing titanium alloy | |
| CN110681869B (en) | Method for preparing high-strength and high-toughness magnesium rare earth alloy by selective laser melting additive manufacturing technology | |
| CN110961630B (en) | Method for regulating dendritic crystal morphology of Al-Si alloy | |
| CN108994267B (en) | 6XXX series aluminum rolled plate preparation method capable of improving processing formability and aging strengthening effect | |
| CN101798649B (en) | Compound 6013-type aluminum alloy microalloyed by zirconium and strontium and preparation method thereof | |
| CN110935877B (en) | Method for forming Inconel625 alloy dendritic crystal morphology | |
| CN112391563B (en) | Preparation method of layered nano heterogeneous aluminum magnesium alloy block material | |
| CN104178670A (en) | Ultrahigh strength aluminium alloy material and preparation method thereof | |
| CN111014675B (en) | Method for obtaining superfine acicular alpha phase of laser 3D printing double-phase titanium alloy | |
| CN111519057A (en) | Method for prolonging service life of die for preparing aluminum alloy | |
| CN103805989B (en) | A kind of method of copper alloy crystallizer surface laser cladding gradient coating | |
| CN114717458B (en) | Rare earth magnesium alloy wire suitable for electric arc additive manufacturing and preparation method thereof | |
| RU2305022C1 (en) | Method for producing foil blank of aluminum-iron-silicon alloy | |
| CN114952075A (en) | High-surface-tension 5xxx aluminum alloy welding wire for electric arc additive manufacturing and preparation method thereof | |
| CN111681714B (en) | Method for growing atypical tertiary dendrites in directional solidification peritectic alloy | |
| Göken et al. | New development in magnesium technology for light weight structures in transportation industries | |
| CN115044788A (en) | Preparation method of non-ferrous metal material | |
| CN112813310B (en) | High-strength Al-Fe-Sc alloy capable of being used for laser additive manufacturing | |
| CN114717452A (en) | High-surface-tension 4 xxx-series aluminum alloy welding wire and preparation method and application thereof | |
| CN114769535A (en) | Method for reducing carbon steel segregation range in round billet by high-frequency pulse current and tail end electromagnetic stirring composite technology | |
| CN105525176A (en) | Preparation and treatment process of Mg-Gd-Y-Zr alloy | |
| CN104498785A (en) | Al-Mg-Er-Zr heat-resistant aluminum alloy and preparation technology thereof | |
| CN109986061B (en) | Preparation method of multi-scale precipitated lamellar structure magnesium alloy | |
| CN110976868B (en) | Method for dendritic crystal morphology of CoCrMo alloy |
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 |