CN112921236A - Metal composition for high-strength welding - Google Patents
Metal composition for high-strength welding Download PDFInfo
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- CN112921236A CN112921236A CN202110045711.0A CN202110045711A CN112921236A CN 112921236 A CN112921236 A CN 112921236A CN 202110045711 A CN202110045711 A CN 202110045711A CN 112921236 A CN112921236 A CN 112921236A
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- 238000003466 welding Methods 0.000 title claims abstract description 88
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 67
- 239000002184 metal Substances 0.000 title claims abstract description 67
- 239000000203 mixture Substances 0.000 title claims abstract description 67
- 239000000463 material Substances 0.000 claims abstract description 28
- 239000012535 impurity Substances 0.000 claims abstract description 18
- 239000000843 powder Substances 0.000 claims description 22
- 238000004519 manufacturing process Methods 0.000 claims description 21
- 239000002245 particle Substances 0.000 claims description 6
- 238000005245 sintering Methods 0.000 claims description 3
- 229910001092 metal group alloy Inorganic materials 0.000 claims 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 28
- 238000010146 3D printing Methods 0.000 abstract description 8
- 229910052742 iron Inorganic materials 0.000 abstract description 8
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 24
- 239000000956 alloy Substances 0.000 description 15
- 239000000654 additive Substances 0.000 description 14
- 230000000996 additive effect Effects 0.000 description 14
- 229910045601 alloy Inorganic materials 0.000 description 14
- 239000011651 chromium Substances 0.000 description 14
- 229910052786 argon Inorganic materials 0.000 description 12
- 238000005516 engineering process Methods 0.000 description 11
- 239000010410 layer Substances 0.000 description 10
- 239000011162 core material Substances 0.000 description 9
- 101100537937 Caenorhabditis elegans arc-1 gene Proteins 0.000 description 6
- 238000010891 electric arc Methods 0.000 description 6
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 6
- 229910052721 tungsten Inorganic materials 0.000 description 6
- 239000010937 tungsten Substances 0.000 description 6
- 229910000851 Alloy steel Inorganic materials 0.000 description 4
- 239000007769 metal material Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 3
- 229910052804 chromium Inorganic materials 0.000 description 3
- 229910052748 manganese Inorganic materials 0.000 description 3
- 229910052750 molybdenum Inorganic materials 0.000 description 3
- 229910052698 phosphorus Inorganic materials 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 238000003892 spreading Methods 0.000 description 3
- 229910052717 sulfur Inorganic materials 0.000 description 3
- 229910052720 vanadium Inorganic materials 0.000 description 3
- 229910001018 Cast iron Inorganic materials 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000011960 computer-aided design Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- 238000000149 argon plasma sintering Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000000788 chromium alloy Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
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Classifications
-
- 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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/34—Laser welding for purposes other than joining
- B23K26/342—Build-up welding
-
- 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
- B33Y70/00—Materials specially adapted for additive manufacturing
-
- 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
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- 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
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
-
- 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
-
- 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
- C22C38/30—Ferrous alloys, e.g. steel alloys containing chromium with cobalt
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Manufacturing & Machinery (AREA)
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Abstract
The invention provides a metal composition for high-strength welding, which comprises the following components in percentage by weight: c: 0.5-1.2%; si: 0.05 to 0.6 percent; mn: 0.1 to 0.6 percent; p: less than or equal to 0.05 percent but not 0 percent; s: less than or equal to 0.05 percent but not 0 percent; cr: 1 to 8 percent; mo: 3 to 7 percent; co: 3 to 8 percent; v: 1 to 5 percent; w: 2 to 10 percent; the balance of Fe and inevitable impurities. The high-strength metal composition for welding provided by the invention has higher hardness, can be used for welding iron base materials, and is particularly used as a 3D printing consumable material.
Description
Technical Field
The present invention relates to a weld metal material, and more particularly, to a metal composition for welding and an alloy obtained from the metal composition.
Background
In the past half century, the fusion of laser technology, computer technology and new material technology has led to a new era of additive manufacturing (3D printing) technology. The additive manufacturing is a direct near-net forming technology without a mold, and is based on computer aided design/manufacturing, materials are solidified and clad layer by layer or stacked layer by layer and connected into an integral structure by block assembly welding, so that a personalized, customized and miniaturized production mode can be realized.
In terms of the physical concept of machining and manufacturing, welding is a typical example of additive manufacturing, and both a welding rod repair surfacing technology and a numerical control automatic welding technology and additive manufacturing based on a high-energy beam heat source belong to the field of generalized additive manufacturing. The technology basis for the rapid development of the additive manufacturing technology of metal components is the technical progress of taking high-energy beams (electron beams and laser beams) as special welding heat sources, the high-energy beams are very flexible, the energy can be accurately controlled, the high-energy beams are deeply fused with computer-aided design/manufacturing information technology, and metal wires or metal powder is filled into a focusing heating area or paved into the focusing heating area in a vacuum chamber or in an inert gas protection environment, so that the materials are melted and solidified and formed layer by layer.
The additive manufacturing essentially belongs to the field of material processing, commonly used additive manufacturing materials (consumables) comprise engineering plastics, rubber materials, photosensitive resin, metal, ceramic and the like, wherein the 3D printing technology of the metal materials is developed rapidly, and metal powder used in 3D printing generally requires high purity, good sphericity, narrow particle size distribution and low oxygen content. At present, the metal powder materials applied to 3D printing mainly include titanium alloys, cobalt-chromium alloys, stainless steel, aluminum alloy materials, and the like.
At present, the additive manufacturing of China already has some influential enterprises and brands in the fields of equipment, software and the like, but materials mainly depend on import, and the research and development of additive manufacturing materials with independent intellectual property rights have important significance.
Disclosure of Invention
The invention provides a metal material for welding and a composition of the metal material for welding.
In a first aspect of the invention, there is provided a high strength metal composition for welding, in particular an additive manufacturing (3D printing) metal or alloy consumable composition.
In a preferred embodiment of the present invention, the high-strength welding metal composition comprises, by weight, based on the total weight of the high-strength welding metal composition:
C：0.5-1.2％；
Si：0.05-0.6％；
Mn：0.1-0.6％；
p: less than or equal to 0.045 percent but not 0; preferably more than or equal to 0.0001%;
s: less than or equal to 0.05 percent but not 0 percent; preferably more than or equal to 0.0001%;
Cr：1-8％；
Mo：3-7％；
Co：3-8％；
V：1-5％；
W：2-10％；
the balance of Fe and inevitable impurities.
The metal composition for high strength welding according to the present invention more preferably includes, in terms of weight ratio, based on the total weight of the metal composition for high strength welding:
C：0.7-1.1％；
Si：0.1-0.5％；
Mn：0.15-0.45％；
p: less than or equal to 0.03 percent but not 0 percent; preferably more than or equal to 0.0001%;
s: less than or equal to 0.03 percent but not 0 percent; preferably more than or equal to 0.0001%;
Cr：2.5-6％；
Mo：4-6％；
Co：3.5-7％；
V：1.3-3.5％；
W：3.5-8％；
the balance of Fe and inevitable impurities.
The metal composition for high strength welding according to the present invention more preferably includes, in terms of weight ratio, based on the total weight of the metal composition for high strength welding:
C：0.85-0.95％；
Si：0.15-0.4％；
Mn：0.2-0.45％；
p: less than or equal to 0.03 percent but not 0 percent; preferably more than or equal to 0.0001%;
s: less than or equal to 0.03 percent but not 0 percent; preferably more than or equal to 0.0001%;
Cr：3.5-5％；
Mo：4.5-5.5％；
Co：4-6％；
V：1.5-3％；
W：5-7％；
the balance of Fe and inevitable impurities.
The metal composition for high strength welding according to the present invention more preferably includes, in terms of weight ratio, based on the total weight of the metal composition for high strength welding:
C：0.85-0.95％；
Si：0.15-0.4％；
Mn：0.2-0.45％；
p: less than or equal to 0.03 percent but not 0 percent; preferably more than or equal to 0.0001%;
s: less than or equal to 0.03 percent but not 0 percent; preferably more than or equal to 0.0001%;
Cr：3.5-4.5％；
Mo：4.5-5.5％；
Co：4.5-5％；
V：1.5-2.5％；
W：5-7％；
the balance of Fe and inevitable impurities.
The second aspect of the invention provides a high-strength welding alloy, which comprises the following components in percentage by weight based on the total weight of the alloy:
C：0.5-1.2％；
Si：0.05-0.6％；
Mn：0.1-0.6％；
p: less than or equal to 0.045 percent but not 0; preferably more than or equal to 0.0001%;
s: less than or equal to 0.05 percent but not 0 percent; preferably more than or equal to 0.0001%;
Cr：1-8％；
Mo：3-7％；
Co：3-8％；
V：1-5％；
W：2-10％；
the balance of Fe and inevitable impurities.
In the high-strength welding alloy of the present invention, the composition, based on the total weight of the high-strength welding alloy, more preferably includes, in terms of weight ratio:
C：0.7-1.1％；
Si：0.1-0.5％；
Mn：0.15-0.5％；
p: less than or equal to 0.03 percent but not 0 percent; preferably more than or equal to 0.0001%;
s: less than or equal to 0.03 percent but not 0 percent; preferably more than or equal to 0.0001%;
Cr：2.5-6％；
Mo：4-6％；
Co：3.5-7％；
V：1.3-3.5％；
W：3.5-8％；
the balance of Fe and inevitable impurities.
In the high-strength welding alloy of the present invention, the composition, based on the total weight of the high-strength welding alloy, more preferably includes, in terms of weight ratio:
C：0.85-0.95％；
Si：0.15-0.4％；
Mn：0.2-0.45％；
p: less than or equal to 0.03 percent but not 0 percent; preferably more than or equal to 0.0001%;
s: less than or equal to 0.03 percent but not 0 percent; preferably more than or equal to 0.0001%;
Cr：3.5-5％；
Mo：4.5-5.5％；
Co：4-6％；
V：1.5-3％；
W：5-7％；
the balance of Fe and inevitable impurities.
In the high-strength welding alloy of the present invention, the composition, based on the total weight of the high-strength welding alloy, more preferably includes, in terms of weight ratio:
C：0.85-0.95％；
Si：0.15-0.4％；
Mn：0.2-0.45％；
p: less than or equal to 0.03 percent but not 0 percent; preferably more than or equal to 0.0001%;
s: less than or equal to 0.03 percent but not 0 percent; preferably more than or equal to 0.0001%;
Cr：3.5-4.5％；
Mo：4.5-5.5％；
Co：4.5-5％；
V：1.5-2.5％；
W：5-7％；
the balance of Fe and inevitable impurities.
The high strength welding metal composition or alloy of the present invention preferably includes a powder. Preferably, the powder is entirely elemental powder, or at least comprises elemental powder.
In a preferred embodiment, the particle size of the elemental powder is preferably 50 to 250 mesh, more preferably 60 to 200 mesh.
More preferably, the elemental powder described herein may be present in such a manner that a part of the powder has a particle diameter outside the above mesh number range, but the powder weight ratio outside this range cannot exceed 10%.
In a preferred embodiment, the particle size of any two elemental powders may be the same or different.
The metal composition or alloy for high-strength welding of the present invention is preferably a welding wire. More preferably, the welding wire skin is iron, and other components are used as core materials and are wrapped by the skin. More preferably, the core material is the powder.
In the above-described metal composition or alloy for high-strength welding, the iron may be present in part in the core material or may be present in the skin.
In a third aspect, the present invention provides a method for manufacturing a 3D printed product, including the steps of laying the high-strength metal composition for welding according to the first aspect on a substrate surface layer by layer, and sintering the high-strength metal composition for welding during or after laying each layer of the high-strength metal composition for welding.
In a preferred embodiment, in the method for manufacturing a 3D printed product, the high-strength metal composition for welding is laid on the surface of the substrate in the form of the welding wire.
Wherein the sintering may preferably be laser sintering.
The high-strength welding metal composition and the alloy prepared from the high-strength welding metal composition have high hardness, can be used for welding forged iron base materials, rolled steel materials and cast iron base materials, and can be particularly used as metal consumable materials for 3D printing (additive manufacturing).
Drawings
Fig. 1 is a schematic structural view of a high-strength welding metal composition additive manufacturing apparatus.
Illustration of the drawings:
1. a laser beam; 2. a metal composition for welding; 3. a molten pool; 4. and (5) a workpiece.
Detailed Description
The steel alloy for a welding material and the composition of the steel alloy according to the present invention will be described below by way of example with reference to specific examples.
Example 1
In this example, as shown in fig. 1, the metal composition for welding 2 was a welding wire, the skin was iron, and the remaining components were powder core materials. Uniformly spreading the metal composition 2 for welding on the surface of the base material 1, wherein an argon nozzle 5 with a tungsten electrode 6 is arranged above the base material, the argon nozzle 5 sprays argon 7, the tungsten electrode 6 forms an electric arc 1, the electric arc 1 heats a workpiece 4 into a molten pool 3 under the argon environment, and the metal composition 2 for welding is cladded and accumulated in the molten pool 3 to form a Hank joint 8, so that a formed part is manufactured.
The core material of the welding metal composition 2 includes C, Si, Mn, P, S, Cr, Mo, Co, V, and W, and it is understood that inevitable impurities may be included in the welding metal composition 2. Specifically, the proportions of the respective components of the metal composition for welding 2 to the total weight of the metal composition for welding 2 are as follows:
C：0.85％；
Si：0.15％；
Mn：0.25％；
P：0.01％；
S：0.01％；
Cr：3.8％；
Mo：4.5％；
Co：4.5％；
V：1.5％；
W：5.5％；
the balance being Fe.
Example 2
In this example, as shown in fig. 1, the metal composition for welding 2 was a welding wire, the skin was iron, and the remaining components were powder core materials. Uniformly spreading the metal composition 2 for welding on the surface of the base material 1, wherein an argon nozzle 5 with a tungsten electrode 6 is arranged above the base material, the argon nozzle 5 sprays argon 7, the tungsten electrode 6 forms an electric arc 1, the electric arc 1 heats a workpiece 4 into a molten pool 3 under the argon environment, and the metal composition 2 for welding is cladded and accumulated in the molten pool 3 to form a Hank joint 8, so that a formed part is manufactured.
The core material of the welding metal composition 2 includes C, Si, Mn, P, S, Cr, Mo, Co, V, and W, and it is understood that inevitable impurities may be included in the welding metal composition 2. Specifically, the proportions of the respective components of the metal composition for welding 2 to the total weight of the metal composition for welding 2 are as follows:
C：0.95％；
Si：0.4％；
Mn：0.35％；
P：0.01％；
S：0.01％；
Cr：4％；
Mo：5％；
Co：5％；
V：1.8％；
W：6％；
the balance being Fe.
Example 3
In this example, as shown in fig. 1, the metal composition for welding 2 was a welding wire, the skin was iron, and the remaining components were powder core materials. Uniformly spreading the metal composition 2 for welding on the surface of the base material 1, wherein an argon nozzle 5 with a tungsten electrode 6 is arranged above the base material, the argon nozzle 5 sprays argon 7, the tungsten electrode 6 forms an electric arc 1, the electric arc 1 heats a workpiece 4 into a molten pool 3 under the argon environment, and the metal composition 2 for welding is cladded and accumulated in the molten pool 3 to form a Hank joint 8, so that a formed part is manufactured.
The core material of the welding metal composition 2 includes C, Si, Mn, P, S, Cr, Mo, Co, V, and W, and it is understood that inevitable impurities may be included in the welding metal composition 2. Specifically, the proportions of the respective components of the metal composition for welding 2 to the total weight of the metal composition for welding 2 are as follows:
C：0.85％；
Si：0.25％；
Mn：0.45％；
P：0.01％；
S：0.01％；
Cr：4.4％；
Mo：5.5％；
Co：5％；
V：2.1％；
W：6.5％；
the balance being Fe.
The steel alloy for the welding material according to the above embodiment of the present invention can be used for welding forged iron base materials, rolled steel materials, and cast iron base materials. The post-welding hardness in the non-tempered and pre-heated condition is shown in table 1, wherein the welding method employs a 3D printing (additive manufacturing) method with a thickness of 0.5mm per layer.
TABLE 1 results of the Performance test of the Steel alloys for welding materials
| Example 1 | Example 2 | Example 3 | |
| HRC hardness (Single layer) | 50-55 | 50-55 | 50-55 |
| HRC hardness (two layers) | 55-60 | 55-60 | 55-60 |
| Surface smoothness | Is substantially smooth | Is substantially smooth | Is substantially smooth |
The embodiments of the present invention have been described in detail, but the embodiments are merely examples, and the present invention is not limited to the embodiments described above. Any equivalent modifications and substitutions to those skilled in the art are also within the scope of the present invention. Accordingly, equivalent changes and modifications made without departing from the spirit and scope of the present invention should be covered by the present invention.
Claims (10)
1. A metal composition for high-strength welding, comprising, in weight proportions based on the total weight of the metal composition for high-strength welding:
C：0.5-1.2％；
Si：0.05-0.6％；
Mn：0.1-0.6％；
p: less than or equal to 0.05 percent but not 0 percent;
s: less than or equal to 0.05 percent but not 0 percent;
Cr：1-8％；
Mo：3-7％；
Co：3-8％；
V：1-5％；
W：2-10％；
the balance of Fe and inevitable impurities.
2. The high-strength welding metal composition according to claim 1, comprising, in weight proportions based on the total weight of the high-strength welding metal composition:
C：0.7-1.1％；
Si：0.1-0.5％；
Mn：0.15-0.5％；
p: less than or equal to 0.03 percent but not 0 percent;
s: less than or equal to 0.03 percent but not 0 percent;
Cr：2.5-6％；
Mo：4-6％；
Co：3.5-7％；
V：1.3-3.5％；
W：3.5-8％；
the balance of Fe and inevitable impurities.
3. The high-strength welding metal composition according to claim 1 or 2, comprising, in weight proportions based on the total weight of the high-strength welding metal composition: c: 0.85 to 0.95 percent;
Si：0.15-0.4％；
Mn：0.2-0.45％；
p: less than or equal to 0.03 percent but not 0 percent;
s: less than or equal to 0.03 percent but not 0 percent;
Cr：3.5-4.5％；
Mo：4.5-5.5％；
Co：4.5-5％；
V：1.5-2.5％；
W：5-7％；
the balance of Fe and inevitable impurities.
4. The high-strength welding metal composition according to claim 1, wherein the high-strength welding metal composition includes a powder, and the powder is an elemental powder entirely or at least includes an elemental powder.
5. The high-strength metal composition for welding according to claim 4, wherein the particle diameters of any two elemental powders are the same or different.
6. The high-strength metal composition for welding according to claim 5, wherein the elemental powder has a particle size of 50 to 250 mesh.
7. The high-strength welding metal alloy is characterized by comprising the following components in percentage by weight based on the total weight of the high-strength welding metal alloy:
C：0.5-1.2％；
Si：0.05-0.6％；
Mn：0.1-0.6％；
p: less than or equal to 0.05 percent but not 0 percent;
s: less than or equal to 0.05 percent but not 0 percent;
Cr：1-8％；
Mo：3-7％；
Co：3-8％；
V：1-5％；
W：2-10％；
the balance of Fe and inevitable impurities.
8. The high strength welding-use metal alloy as set forth in claim 7, wherein the composition comprises, in terms of weight ratio, based on the total weight of the high strength welding-use metal alloy:
C：0.85-0.95％；
Si：0.15-0.4％；
Mn：0.2-0.45％；
p: less than or equal to 0.03 percent but not 0 percent;
s: less than or equal to 0.03 percent but not 0 percent;
Cr：3.5-5％；
Mo：4.5-5.5％；
Co：4-6％；
V：1.5-3％；
W：5-7％；
the balance of Fe and inevitable impurities.
9. The high strength welding-use metal alloy as set forth in claim 7, wherein the composition comprises, in terms of weight ratio, based on the total weight of the high strength welding-use metal alloy:
C：0.85-0.95％；
Si：0.15-0.4％；
Mn：0.2-0.45％；
p: less than or equal to 0.03 percent but not 0 percent;
s: less than or equal to 0.03 percent but not 0 percent;
Cr：3.5-4.5％；
Mo：4.5-5.5％；
Co：4.5-5％；
V：1.5-2.5％；
W：5-7％；
the balance of Fe and inevitable impurities.
10. A method of manufacturing a 3D printed product, comprising:
laying the high-strength welding metal composition of claim 1 on the surface of a base material layer by layer, and sintering each layer of the high-strength welding metal composition during or after laying.
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