CN115026305B - Additive manufacturing method of 4Cr5Mo2SiV die steel - Google Patents
Additive manufacturing method of 4Cr5Mo2SiV die steel Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
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- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/20—Direct sintering or melting
- B22F10/25—Direct deposition of metal particles, e.g. direct metal deposition [DMD] or laser engineered net shaping [LENS]
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- 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
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- 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
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- 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
- B33Y40/10—Pre-treatment
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- 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
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- 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
- B33Y70/00—Materials specially adapted for additive manufacturing
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- 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
Abstract
The invention discloses an additive manufacturing method of 4Cr5Mo2SiV die steel, which comprises the following steps: 1) Pretreating a region to be deposited of the 4Cr5Mo2SiV die steel; 2) Mixing and drying 4Cr5MoSiV1 die steel powder and W6Mo5Cr4V2 high-speed steel powder to prepare a manufacturing material, determining the mass percentage content, laser power and scanning speed of the W6Mo5Cr4V2 high-speed steel powder in the manufacturing material according to the hardness requirement of a region to be deposited, and performing laser metal deposition on the region to be deposited to form a deposition layer; 3) And milling and grinding the deposited layer. The invention can accurately control the performance of the deposition layer by adjusting the proportion of the 4Cr5MoSiV1 die steel powder and the W6Mo5Cr4V2 high-speed steel powder, and the deposition layer has compact structure, less defects, higher strength and hardness, good additive manufacturing effect and wide application prospect.
Description
Technical Field
The invention relates to the technical field of additive manufacturing, in particular to an additive manufacturing method of 4Cr5Mo2SiV die steel.
Background
When the hot-work die steel is in service, the cycle changes of temperature and mechanical load are usually accompanied, and under the periodic action of alternating stress generated by the load of a heat engine, a plurality of large stress areas on the surface of the die can generate local plastic deformation, and the die can fail after crack initiation and expansion. The large-scale die has long production and manufacturing period and high cost, and the local repair and reinforcement of the die is beneficial to prolonging the service life of the die and improving the utilization rate of materials, thereby having extremely high economic value.
The main functions of Mo element in alloy steel include: 1) Mo has stronger carbide forming capability, and the carbide formed by the Mo is dispersed in a matrix, so that the alloy steel matrix with lower carbon content also has higher hardness and wear resistance; 2) Mo can make the curve of the alloy steel C move to the right, and the hardenability of the alloy steel can be greatly improved; 3) Mo can prevent austenitized grains from being coarse, and can improve the high-temperature strength of the alloy steel; 4) Mo does not segregate to the austenite grain boundary, and simultaneously can prevent Cr and other impurity elements from segregating to the austenite grain boundary, and can prevent or reduce temper brittleness caused by segregation. In conclusion, mo can improve the hardness and strength of alloy steel at normal temperature, can also obviously improve the high-temperature strength of the alloy steel and improve the wear resistance of the alloy steel to a certain extent, so that Mo die steel is widely applied in recent years.
The 4Cr5Mo2SiV die steel is high-quality hot-work die steel which is obtained by increasing the Mo content (from 1.10-1.75% to 2.15-2.40%) and reducing the V content (from 0.80-1.20% to 0.45-0.90%) on the basis of the conventional 4Cr5MoSiV1 steel, has more excellent performances in the aspects of thermal fatigue cracking resistance, thermal shock cracking resistance, thermal wear resistance, plastic deformation resistance and the like, and becomes the best choice for steel for large-scale high-end die casting, hot forging and hot extrusion dies. However, even molds made of 4Cr5Mo2SiV mold steel, which has excellent thermal fatigue cracking resistance, still exhibit local cracks during long-term use, requiring repair, reinforcement or further manufacturing.
At present, the methods for strengthening or repairing the steel containing the die generally comprise arc welding, thermal spraying, brush plating and the like, and the methods generally have the problems of thermal deformation, large residual stress, low efficiency, uneven structure performance and the like, and are difficult to completely meet the requirements of practical application.
Therefore, the development of the additive manufacturing method of the 4Cr5Mo2SiV die steel with good manufacturing effect is of great significance.
Disclosure of Invention
The invention aims to provide an additive manufacturing method of 4Cr5Mo2SiV die steel.
The technical scheme adopted by the invention is as follows:
the additive manufacturing method of the 4Cr5Mo2SiV die steel comprises the following steps:
1) Pretreating a region to be deposited of the 4Cr5Mo2SiV die steel;
2) Mixing and drying 4Cr5MoSiV1 die steel powder and W6Mo5Cr4V2 high-speed steel powder to prepare a manufacturing material, determining the mass percentage content, laser power and scanning speed of the W6Mo5Cr4V2 high-speed steel powder in the manufacturing material according to the hardness requirement of a region to be deposited, and performing laser metal deposition on the region to be deposited to form a deposition layer;
3) And milling and grinding the deposition layer.
Preferably, the operation of the pretreatment in step 1) includes: and (3) polishing the area to be deposited by using sand paper until the surface roughness Ra value is more than or equal to 3.2, and then cleaning.
Preferably, the sanding is performed by 400# to 800# sandpaper.
Preferably, the cleaning is performed by using absolute ethyl alcohol.
Preferably, the mixing in the step 2) is carried out under the condition that the rotating speed of a mixer is 40 rpm-100 rpm, and the mixing time is 2 h-8 h.
Preferably, the drying in the step 2) is carried out at 60-100 ℃, and the drying time is 2-4 h.
Preferably, the mass percentage content, the laser power and the scanning speed of the W6Mo5Cr4V2 high-speed steel powder in the manufacturing material in the step 2) are calculated by a fitting formula as follows:
H＝7588-2.178×P-17×S-258.833×M+0.005142×P×S+0.089×P×M+0.5852×S×M+0.001972×P 2 -0.000203×P×S×M，
in which H is the hardness required for the area to be deposited and has the unit HV 0.3 ；
P is laser power in W;
s is scanning speed, and the unit is mm/min;
m is the mass percentage content of W6Mo5Cr4V2 high-speed steel powder in the manufacturing material.
Preferably, the laser power in step 2) is 1800W-3200W.
Preferably, the scanning speed in the step 2) is 300 mm/min-800 mm/min.
Preferably, the hardness of the region to be deposited in the step 2) is divided into three grades:
first order hardness of 420HV 0.3 ～520HV 0.3 The mass percentage content of W6Mo5Cr4V2 high-speed steel powder in the corresponding manufacturing material is 0-15%;
secondary hardness of 520HV 0.3 ～630HV 0.3 The mass percentage content of the W6Mo5Cr4V2 high-speed steel powder in the corresponding manufacturing material is 15-25%;
the third-order hardness is 630HV 0.3 ～710HV 0.3 The mass percentage content of the W6Mo5Cr4V2 high-speed steel powder in the corresponding manufacturing material is 25-45%.
Note: when determining the mass percentage of the W6Mo5Cr4V2 high-speed steel powder in the manufacturing material according to the hardness grade of the area to be deposited, the mass percentage of the W6Mo5Cr4V2 high-speed steel powder is preferably selected to be an intermediate value, and integers are taken, for example: third-order hardness of 630HV 0.3 ～710HV 0.3 And the mass percentage of the W6Mo5Cr4V2 high-speed steel powder in the corresponding manufacturing material is 35 percent.
Preferably, the 4Cr5MoSiV1 die steel powder in the step 2) is prepared by an air-spraying method, and the particle size is 50-150 microns.
Preferably, the 4Cr5MoSiV1 die steel powder in the step 2) comprises the following components in percentage by mass:
C：0.32％～0.45％；
V：0.80％～1.20％；
Cr：4.75％～5.50％；
Mo：1.10％～1.75％；
Mn：0.20％～0.50％；
Si：0.80％～1.20％；
S：≤0.03％；
P：≤0.03％；
fe: and (4) the balance.
Preferably, the W6Mo5Cr4V2 high-speed steel powder in the step 2) is prepared by an air-spraying method, and the particle size is 30-120 microns.
Preferably, the W6Mo5Cr4V2 high-speed steel powder in the step 2) comprises the following components in percentage by mass:
C：0.80％～0.90％；
W：5.50％～6.75％；
Mo：4.50％～5.50％；
Cr：3.80％～4.40％；
V：1.75％～2.20％；
Mn：0.15％～0.40％；
Si：0.20％～0.45％；
S：≤0.03％；
P：≤0.03％；
fe: and (4) the balance.
Preferably, the specific operations of milling and grinding in step 3) are as follows: an oxide layer on the surface of the deposition layer and the deposition metal with a certain thickness are removed through milling, and then polishing is carried out, so that the shape, the size and the roughness of the 4Cr5Mo2SiV die steel workpiece can meet the use requirements.
The invention has the beneficial effects that: the invention can accurately control the performance of the deposition layer by adjusting the proportion of the 4Cr5MoSiV1 die steel powder and the W6Mo5Cr4V2 high-speed steel powder, and the deposition layer has compact structure, less defects, higher strength and hardness, good additive manufacturing effect and wide application prospect.
Specifically, the method comprises the following steps:
1) According to the invention, the ratio of the 4Cr5MoSiV1 die steel powder to the W6Mo5Cr4V2 high-speed steel powder is adjusted, and the laser power and the scanning speed matched with the powder are combined, so that the accurate control of the performance of a deposition layer can be realized (the W6Mo5Cr4V2 high-speed steel powder contains 4.50-5.50% of Mo, which can increase the Mo content of the deposition layer, thereby increasing the strength and the hardness of the deposition layer, the W6Mo5Cr4V2 high-speed steel powder also contains 5.50-6.75% of W element, the W and Mo have the same action, which is also beneficial to the improvement of the performance of the deposition layer, the C content in the W6Mo5Cr4V2 high-speed steel powder is 0.80-0.90%, which is higher than that of the 4Cr5Mo2SiV die steel, C is dissolved in the 4Cr5Mo2SiV die steel in a solid solution, and the hardness and the strength of the 4Cr5Mo2SiV die steel can be improved);
2) The deposited layer formed in the area to be deposited of the 4Cr5Mo2SiV die steel has compact structure, less defects, higher strength and hardness (the tensile strength is 1400-2000 MPa, the yield strength is 800-1200 MPa, and the Vickers hardness of the surface layer is 470HV 0.3 ～710HV 0.3 ) Additive manufacturing (including repair, reinforcement or further manufacturing) is effective.
Drawings
FIG. 1 is a scanning electron micrograph of the 4Cr5MoSiV1 die steel powder of examples 1 and 2.
FIG. 2 is a scanning electron micrograph of the W6Mo5Cr4V2 high speed steel powder of examples 1 and 2.
Fig. 3 is a gold phase diagram of a cross section of the deposited layer in step 2).
FIG. 4 is a scanning electron microscope image of the bonding part of the deposition layer and the 4Cr5Mo2SiV die steel matrix in the step 2).
FIG. 5 is a tensile curve of the 4Cr5Mo2SiV mold steel substrate and the deposited layer of example 1.
FIG. 6 is a tensile curve of the 4Cr5Mo2SiV die steel substrate and the deposited layer of example 2.
Detailed Description
The invention will be further explained and illustrated with reference to specific examples.
The 4Cr5MoSiV1 die steel powder (shown in a scanning electron microscope picture as figure 1) in the embodiment 1 and the embodiment 2 is prepared by an aerosol method, the particle size is 50-150 μm, the median particle size is 100 μm, and the mass percentages of the components are as follows: c:0.35 percent; v:1.00 percent; cr:5.05 percent; mo:1.35 percent; mn:0.32 percent; si:0.95 percent; s: less than or equal to 0.03 percent; p: less than or equal to 0.03 percent; fe: and (4) the balance.
The W6Mo5Cr4V2 high-speed steel powder (shown in a scanning electron microscope picture as figure 2) in the embodiment 1 and the embodiment 2 is prepared by an aerosol method, the particle size is 30-120 μm, the median particle size is 75 μm, and the mass percentage of each component is as follows: c:0.85 percent; w:6.55 percent; mo:5.02 percent; cr:4.28 percent; v:1.87 percent; mn:0.33 percent; si:0.24 percent; s: less than or equal to 0.03 percent; p: less than or equal to 0.03 percent; fe: and (4) the balance.
Example 1:
an additive manufacturing method of 4Cr5Mo2SiV die steel (for strengthening the 4Cr5Mo2SiV die steel, the thickness of a deposition layer is required to reach 3mm, and the hardness reaches 670HV 0.3 ～700HV 0.3 ) Which comprises the following steps:
1) Polishing a to-be-deposited area on the surface of 4Cr5Mo2SiV die steel (flat plate) by using 400# abrasive paper until the surface roughness Ra value is 3.2, and cleaning by using absolute ethyl alcohol;
2) Adding 4Cr5MoSiV1 die steel powder and W6Mo5Cr4V2 high-speed steel powder into a rotary drum powder mixer according to a mass ratio of 65; the mass percentage content of the 4Cr5MoSiV1 die steel powder in the manufacturing material is 35%, the laser power is 3000W (taking an integer), and the scanning speed is 400mm/min according to the following fitting formula:
H＝7588-2.178×P-17×S-258.833×M+0.005142×P×S+0.089×P×M+0.5852×S×M+0.001972×P 2 0.000203 XP S M, where H is the hardness required by the area to be deposited, in HV 0.3 (ii) a P is laser power in W; s is scanning speed, and the unit is mm/min; m is the mass percentage content of W6Mo5Cr4V2 high-speed steel powder in the manufacturing material;
3) And after the 4Cr5Mo2SiV die steel is cooled to room temperature, removing an oxide layer on the surface of the deposited layer and deposited metal with a certain thickness by milling, and polishing to ensure that the shape, the size and the roughness of the 4Cr5Mo2SiV die steel workpiece meet the use requirements.
And (3) performance testing:
1) The gold phase diagram of the section of the deposition layer in the step 2) is shown as 3, and the Scanning Electron Microscope (SEM) diagram of the combination part of the deposition layer and the 4Cr5Mo2SiV die steel matrix is shown as 4.
As can be seen from fig. 3 and 4: the deposited layer has no obvious holes and cracks, the heat affected zone is small, and good metallurgical bonding is formed between the deposited layer and the matrix.
2) The tensile curves of the 4Cr5Mo2SiV die steel substrate and the deposited Layer (LMD) in this example are shown in fig. 5.
As can be seen from fig. 5: the deposited layer has higher strength and hardness, the tensile strength and the yield strength respectively reach 1925MPa and 1193MPa, and are improved by 32 percent and 23 percent compared with a 4Cr5Mo2SiV die steel matrix.
In addition, through testing, the Vickers hardness of the surface layer of the settled layer reaches 696HV 0.3 Compared with a 4Cr5Mo2SiV die steel matrix, the hardness value of the steel matrix is increased by 46 percent and is 670HV 0.3 ～700HV 0.3 Within.
Example 2:
additive manufacturing method of 4Cr5Mo2SiV die steel (for repairing 4Cr5Mo2SiV die steel, the thickness of a deposition layer is required to reach 6mm, and the hardness reaches 640HV 0.3 ～660HV 0.3 ) Which comprises the following steps:
1) Removing 4Cr5Mo2SiV die steel 2mm below the bottom of a 4Cr5Mo2SiV die steel die (with cracks on the surface) and 3mm outside the center by milling, determining a milling area as an area to be deposited, polishing the milling area by 400# abrasive paper until the surface roughness Ra value is 3.2, and cleaning the milling area by absolute ethyl alcohol;
2) Adding 4Cr5MoSiV1 die steel powder and W6Mo5Cr4V2 high-speed steel powder into a rotary drum powder mixer according to a mass ratio of 70; the mass percentage content of the 4Cr5MoSiV1 die steel powder in the manufacturing material is 30%, the laser power is 2800W (taking an integer), and the scanning speed is 400mm/min according to the following fitting formula:
H＝7588-2.178×P-17×S-258.833×M+0.005142×P×S+0.089×P×M+0.5852×S×M+0.001972×P 2 0.000203 XP S M, where H is the hardness required by the area to be deposited, in HV 0.3 (ii) a P is laser power in W; s is scanning speed, and the unit is mm/min; m is the mass percentage content of W6Mo5Cr4V2 high-speed steel powder in the manufacturing material;
3) And after the 4Cr5Mo2SiV die steel die is cooled to room temperature, removing an oxide layer on the surface of the deposition layer and deposited metal with a certain thickness by milling, and polishing to ensure that the shape, the size and the roughness of the 4Cr5Mo2SiV die steel workpiece meet the use requirements.
And (3) performance testing:
the tensile curves of the 4Cr5Mo2SiV die steel substrate and the deposited Layer (LMD) in this example are shown in fig. 6.
As can be seen from fig. 6: the deposited layer has higher strength and hardness, the tensile strength and the yield strength reach 1821MPa and 1140MPa respectively, and are improved by 24 percent and 18 percent compared with a 4Cr5Mo2SiV die steel matrix.
In addition, the Vickers hardness of the surface layer of the deposited layer reaches 657HV after testing 0.3 Compared with a 4Cr5Mo2SiV die steel matrix, the hardness value is increased by 38 percent and is in a required range of 640HV 0.3 ～660HV 0.3 Within.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (9)
1. The additive manufacturing method of the 4Cr5Mo2SiV die steel is characterized by comprising the following steps of:
1) Pretreating a region to be deposited of the 4Cr5Mo2SiV die steel;
2) Mixing and drying 4Cr5MoSiV1 die steel powder and W6Mo5Cr4V2 high-speed steel powder to prepare a manufacturing material, determining the mass percentage content, the laser power and the scanning speed of the W6Mo5Cr4V2 high-speed steel powder in the manufacturing material according to the hardness requirement of a region to be deposited, and then performing laser metal deposition on the region to be deposited to form a deposition layer;
3) Milling and polishing the deposition layer;
the mass percentage content, the laser power and the scanning speed of the W6Mo5Cr4V2 high-speed steel powder in the manufacturing material in the step 2) are calculated by a fitting formula shown as follows:
H＝7588-2.178×P-17×S-258.833×M+0.005142×P×S+0.089×P×M+0.5852×S×M+0.001972×P 2
-0.000203×P×S×M，
in which H is the hardness required for the area to be deposited and has the unit HV 0.3 ；
P is laser power in W;
s is scanning speed with unit of mm/min;
m is the mass percentage content of W6Mo5Cr4V2 high-speed steel powder in the manufacturing material.
2. The additive manufacturing method of 4Cr5Mo2SiV die steel according to claim 1, wherein: the pretreatment operation of the step 1) comprises the following steps: and (3) polishing the area to be deposited by using sand paper until the surface roughness Ra value is more than or equal to 3.2, and then cleaning.
3. The additive manufacturing method of 4Cr5Mo2SiV die steel according to claim 1, wherein: the mixing in the step 2) is carried out under the condition that the rotating speed of a mixing machine is 40 rpm-100 rpm, and the mixing time is 2 h-8 h; the drying in the step 2) is carried out at the temperature of 60-100 ℃, and the drying time is 2-4 h.
4. The method for additive manufacturing of 4Cr5Mo2SiV die steel according to any one of claims 1 to 3, wherein: step 2) the hardness of the area to be deposited is divided into three levels:
first order hardness of 420HV 0.3 ～520HV 0.3 The mass percentage content of W6Mo5Cr4V2 high-speed steel powder in the corresponding manufacturing material is 0-15%;
secondary hardness of 520HV 0.3 ～630HV 0.3 The mass percentage content of the W6Mo5Cr4V2 high-speed steel powder in the corresponding manufacturing material is 15-25%;
third-order hardness of 630HV 0.3 ～710HV 0.3 The corresponding weight percentage content of the W6Mo5Cr4V2 high-speed steel powder in the manufacturing material is 25-45%.
5. The method for additive manufacturing of 4Cr5Mo2SiV die steel according to any one of claims 1 to 3, wherein: the 4Cr5MoSiV1 die steel powder in the step 2) is prepared by an air-atomizing method, and the particle size is 50-150 mu m.
6. The additive manufacturing method of 4Cr5Mo2SiV die steel according to claim 5, wherein: the 4Cr5MoSiV1 die steel powder in the step 2) comprises the following components in percentage by mass:
C：0.32％～0.45％；
V：0.80％～1.20％；
Cr：4.75％～5.50％；
Mo：1.10％～1.75％；
Mn：0.20％～0.50％；
Si：0.80％～1.20％；
S：≤0.03％；
P：≤0.03％；
fe: and (4) the balance.
7. The method for additive manufacturing of 4Cr5Mo2SiV die steel according to any one of claims 1 to 3, wherein: and 2) preparing the W6Mo5Cr4V2 high-speed steel powder by an air-atomization method, wherein the particle size is 30-120 microns.
8. The additive manufacturing method of 4Cr5Mo2SiV die steel according to claim 7, wherein: step 2) the W6Mo5Cr4V2 high-speed steel powder comprises the following components in percentage by mass:
C：0.80％～0.90％；
W：5.50％～6.75％；
Mo：4.50％～5.50％；
Cr：3.80％～4.40％；
V：1.75％～2.20％；
Mn：0.15％～0.40％；
Si：0.20％～0.45％；
S：≤0.03％；
P：≤0.03％；
fe: and (4) the balance.
9. The method for additive manufacturing of 4Cr5Mo2SiV die steel according to any one of claims 1 to 3, wherein: and 3), the specific operations of milling and polishing are as follows: an oxide layer on the surface of the deposition layer and the deposition metal with a certain thickness are removed through milling, and then polishing is carried out, so that the shape, the size and the roughness of the 4Cr5Mo2SiV die steel workpiece can meet the use requirements.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210549348.0A CN115026305B (en) | 2022-05-20 | 2022-05-20 | Additive manufacturing method of 4Cr5Mo2SiV die steel |
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| CN202210549348.0A CN115026305B (en) | 2022-05-20 | 2022-05-20 | Additive manufacturing method of 4Cr5Mo2SiV die steel |
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