CN115475957A

CN115475957A - Method for manufacturing additive through synchronous feeding of silk powder

Info

Publication number: CN115475957A
Application number: CN202211067253.1A
Authority: CN
Inventors: 原思宇; 王旭
Original assignee: Huaqiao University
Current assignee: Huaqiao University
Priority date: 2022-09-01
Filing date: 2022-09-01
Publication date: 2022-12-16

Abstract

The invention relates to the technical field of additive manufacturing, in particular to a method for synchronously feeding and additive manufacturing silk powder, which comprises designing a printing path, wherein the printing path is designed according to a printing model through a computer; providing a wire material to be melted by a melting device to carry out cladding deposition along a printing path; and providing at least one powder feeding nozzle which moves together with the melting device, wherein the powder feeding nozzle is used for blowing powder into a wire molten pool in real time until the cladding deposition is finished to the required shape. Compared with the prior art, the invention combines the advantages of two feeding modes of powder and wire materials, can better control the components and proportion of the reinforced phase of the material and the thickness of a deposition layer in the additive manufacturing process, greatly improves the performance of the material, and can avoid the limitation of wire material preparation. The powder feeding amount and the feeding components can be adjusted in real time through the powder feeding spray heads, and a plurality of powder feeding spray heads are arranged to feed different types of reinforced phase powder materials, so that the waste of raw materials is reduced, and the cost is reduced.

Description

Method for manufacturing additive through synchronous feeding of silk powder

Technical Field

The invention relates to the technical field of additive manufacturing, in particular to a method for manufacturing a wire powder additive by synchronously feeding and adding materials.

Background

Wear consumption is one of the main ways of material loss, and the economic losses due to the wear of industrial machinery and parts thereof are large each year, for example, 6-8 ten thousand tons of steel plates are used each year in a scraper conveyor trough in the coal mine industry. The friction wear, the corrosion wear and the fatigue wear are main wear modes, so the development and the application of the high-strength wear-resistant steel have great significance undoubtedly on the aspect.

With the development of modern industry, the requirements of large-scale engineering machinery on steel materials are higher and higher, wherein the high-strength and wear-resistant low-alloy steel plate is widely applied to the large-scale engineering machinery such as a cement tank truck, mining machinery, a concrete mixer, a crane and the like, and the steel plate with more outstanding wear resistance and longer service life is applied to the key parts of the machinery, so that the working period of the machinery can be greatly prolonged, the industrial cost is reduced, and the requirements of energy conservation and environmental protection are better met. At present, the wear-resistant materials mainly have the following application fields: various basic heavy industrial plants such as thermal power plants, coal mine plants, cement plants, metallurgical plants, etc. The method has the following main application aspects: the spiral case of fan impeller, the funnel welt, burner of burner, coal yard chute inside lining, pusher bottom plate, the interior welt of the discharge chute of cement plant etc.. The steel is required to be used at positions such as lifting, bearings, wheels and the like required by various loading and unloading places.

In recent years, some experts have studied the components of wear-resistant steel and smelting process to improve the wear resistance of metal parts, and have made some progress, but some problems still remain. The invention discloses a high-toughness low-alloy wear-resistant steel thick plate and a manufacturing method thereof, which are disclosed in Chinese patent publication No. CN110846571A (publication), and the invention discloses a wear-resistant steel which comprises the following components: 0.12% -0.20%, si: 0.10-0.30%, mn: 0.80-1.60%, P is less than or equal to 0.012%, S is less than or equal to 0.003%, cr:0.30% -1.00%, mo: 0.20-0.60%, ni:0.80% -1.20%, nb:0.012% -0.045%, V: 0.020% -0.060%, B:0.0008 to 0.0025 percent, less than or equal to 0.0040 percent of N, less than or equal to 0.0025 percent of O, and the balance of Fe and inevitable impurities. The wear-resisting plate mainly comprises bainite and flaky martensite, although the hardness of the wear-resisting plate reaches more than 310HB, the Charpy impact energy at the low temperature of minus 40 ℃ is more than or equal to 30J, and the wear resistance is good, the hardness of the wear-resisting plate can not meet the requirements of turnout switch rails, crushers and the like.

The invention discloses a wear-resistant steel plate and a manufacturing method thereof in Chinese patent publication No. CN103160742A, wherein the chemical components of the wear-resistant steel plate are as follows: 0.60 to 0.75%, si:0.10 to 0.50%, mn: 0.40-1.20%, P is less than or equal to 0.015%, S is less than or equal to 0.010%, ni:0.50 to 1.50%, cu: 0.10 to 0.50%, al: 0.010-0.080%, more than or equal to 0.0010% and less than or equal to 0.0080% of Ca, less than or equal to 0.0080% of N, less than or equal to 0.0080% of O, less than or equal to 0.0004% of H, and the balance of Fe and inevitable impurities. Although the wear resistance is improved to some extent, the hardness of the steel plate is 250HB, and the steel plate cannot be applied to some fields with high requirements on wear resistance.

The invention discloses a manufacturing method for improving the production stability of thin specifications of hot-rolled wear-resistant steel BH550MC, which is disclosed in Chinese invention patent with publication number CN 114130818A. However, the process is only suitable for large-scale and large-scale manufacturing, devices required by smelting cannot be smelted according to requirements, the manufacturing cost for low-scale and small-scale manufacturing is very high, and finished products cannot be directly manufactured according to requirements.

In addition, in the prior art, a method for additive manufacturing technology generally includes directly cladding a prepared wire or powder, and in some schemes requiring adding a reinforcing phase powder, the welding wire is generally directly clad by filling a reinforcing powder inside the welding wire.

In summary, an object of the present invention is to provide an additive manufacturing method that can improve performance of a reinforcing phase powder.

Disclosure of Invention

In order to solve the defects in the prior art, the invention provides a method for synchronously feeding and additive manufacturing silk powder, which comprises the following steps:

designing a printing path, wherein the printing path is designed according to a printing model through a computer;

providing a wire to be subjected to cladding deposition by a melting device along the printing path;

and providing at least one powder feeding nozzle which moves together with the melting device, wherein the powder feeding nozzle is used for instantly blowing powder into the wire molten pool until the cladding deposition is finished to the required shape.

In some embodiments, the method of designing a print path includes:

establishing the printing model of the part to be printed through three-dimensional modeling software;

and the computer performs slicing and layering processing according to the printing model to obtain the printing path layer by layer.

In some embodiments, the melting device comprises a combination of one or more of a laser heat source, an arc heat source, a laser arc hybrid heat source, an electron beam heat source, or a plasma heat source.

In some embodiments, inert gas or vacuum protection is used in the cladding deposition process;

the inert gas protection comprises introducing inert gas into a powder feeding nozzle, and spraying the inert gas out along with the powder, wherein the temperature of the gas is between 20 and 300 ℃.

In some embodiments, a heat treatment after the finished part is formed is also included.

In some embodiments, the powder comprises one or more of WC, W, siC, or TiB 2.

In some embodiments, the wire has a chemical composition and weight percent of: less than or equal to 0.4 percent of C, less than or equal to 1.8 percent of Si, less than or equal to 2.0 percent of Mn, less than or equal to 0.012 percent of P, less than or equal to 0.012 percent of S, less than or equal to 1.5 percent of Cr, less than or equal to 0.65 percent of Mo, less than or equal to 1.0 percent of Ni, and the balance of Fe;

or the following steps: less than or equal to 0.2 percent of C, less than or equal to 0.9 percent of Si, less than or equal to 1.4 percent of Mn, less than or equal to 0.015 percent of P, less than or equal to 0.015 percent of S, less than or equal to 0.5 percent of Cr, less than or equal to 0.1 percent of Mo, and the balance of Fe;

the powder includes WC.

In some embodiments, wherein the melting device employs a laser heat source, the laser power is between 500-2000W, 2000-6000W, 6000-30000W, and the scanning speed of the laser is between 30-300mm/min, 300-1200mm/min, 1200-6000mm/min.

In some embodiments, the wire has a diameter of 0.6-3.2mm, a wire feed speed of 30-500mm/min, 500-2000mm/min, 2000-10000mm/min, and a powder feed rate of 2-30g/min.

In some embodiments, the powder has a size of 40-300 μm and 750-1200 μm, and the powder accounts for 10-80% of the total mass fraction of the cladding metal.

Based on the above, compared with the prior art, the synchronous feeding additive manufacturing method of the wire powder and the wear-resistant material provided by the invention combine the advantages of two feeding modes of the powder and the wire, so that the components and proportion of the material reinforcing phase and the thickness of a deposition layer can be better controlled in the additive manufacturing process, the performance of the material is greatly improved, and the limitation of wire preparation can be avoided. The powder feeding amount and the feeding components can be adjusted in real time through the powder feeding spray heads, and a plurality of powder feeding spray heads are arranged to feed different types of reinforced phase powder materials, so that the waste of raw materials is reduced, and the cost is reduced.

Benefits of the present invention also include improved utilization of the fines. According to the invention, powder is not directly utilized for cladding, the traditional additive manufacturing powder needs to be laid in advance, the cladding process is easy to blow away and splash, and the utilization rate is low, the powder is blown into a molten pool, the molten pool has a strong adsorption effect on the powder, the powder is not easy to escape, and the utilization rate of the powder is close to 100%.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts; in the following description, the drawings are illustrated in a schematic view, and the drawings are not intended to limit the present invention.

Fig. 1 is a schematic view of an embodiment of a method for manufacturing a silk powder synchronously feeding and additive manufacturing.

Reference numerals are as follows:

powder feeding nozzle of 1 wire 2 melting device 3

1a molten pool

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments; the technical features designed in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other; all other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.

In the description of the present invention, "a plurality" means two or more unless otherwise specified. In addition, the term "comprises" and any variations thereof mean "including at least".

In order to achieve at least one of advantages or other advantages, the invention provides a method for manufacturing additive materials by synchronously feeding silk powder, which comprises the following steps:

providing a wire 1 to be subjected to cladding deposition by a melting device along the printing path;

as shown in FIG. 1, at least one powder feeding nozzle 3 is provided to move together with the melting device, and the powder feeding nozzle 3 is used for instantly blowing powder into the wire material molten pool 1a until the cladding deposition is finished to a desired shape.

In some embodiments, wherein the method of designing a print path comprises:

The melting device 2 comprises a laser heat source or an electric arc heat source, the laser heat source and the electric arc heat source are commonly used in the existing additive manufacturing technology, the electric arc heat source is manufactured by electric arc additive manufacturing by adopting a consumable electrode electric arc power supply with the maximum current of 500A, an electric arc welding gun and a substrate are placed in a pure Ar airtight closed box body, the whole melting deposition forming process is carried out under the protection of inert gas (the oxygen content is less than or equal to 80 ppm), and the electric arc welding gun carries out melting deposition according to a planned path.

In some implementations, the additive manufacturing process may be performed without a gas shield, or with an inert gas or vacuum shield. Wherein the inert gas and the vacuum protection can be inert gas or vacuum atmosphere for manufacturing the additive. The invention is not limited to the above, the inert gas may also be introduced into the powder feeding mechanism, the powder feeding is realized while the atmosphere protection is realized for the molten pool, the cost is not high, the closed gas atmosphere is not required to be built, and in some embodiments, the temperature of the inert gas is controlled to be 20-300 ℃.

Preferably, in some embodiments, after the cladding deposition is completed to obtain the workpiece shape by the method, the method further comprises performing heat treatment, wherein the heat treatment comprises heat preservation at 820-960 ℃ for 1.25-1.45min/mm, post quenching, heat preservation at 220-280 ℃ for 3.7-4.5min/mm, and air cooling.

Preferably, in some embodiments, the powder composition may be modified to other reinforcing phase particles, such as SiC, tiB2, etc., depending on the application field performance requirements. Preferably, the powder feeding nozzle 3 can be added according to the requirements of the application field, and the newly added powder feeding nozzle 3 and the original powder feeding nozzle 3 both blow reinforcing phase particles into the molten pool. For example, a powder feeding nozzle 3 is added beside the original powder feeding nozzle 3, and two reinforcing phases of WC and SiC are added in the additive manufacturing process. In addition, the particle size of the powder material in each powder feeding spray head can be automatically adjusted according to the requirement.

The invention combines the advantages of two feeding modes of powder and wire, can better control the components and proportion of the steel reinforcing phase and the thickness of a deposition layer in the additive manufacturing process, greatly improves the performance of the material, and simultaneously can avoid the pollution of the powder and the limitation of the wire preparation.

The invention has simple component control, can adjust the powder feeding amount and the feeding components in real time according to the actual situation, thereby changing the composition of the metal matrix, greatly improving the strength and the wear resistance of the metal device, better prolonging the service performance of the metal device, reducing the waste of raw materials and lowering the cost.

The invention not only can directly manufacture a design model through additive manufacturing, but also can carry out laser surface cladding on an additive manufacturing device and carry out a heat treatment process, thereby greatly improving the performance of the additive manufacturing device. Besides the directly manufactured additive manufacturing device, the laser surface cladding can also be directly carried out on the metal device, the service performance of the metal device is enhanced, and the application range is wide.

Compared with the prior art, the wear-resistant material obtained by optimizing the element proportion has good performance, can be used for manufacturing devices with different wear-resistant properties according to requirements, is flexible to manufacture, has low production cost and little pollution when being used for small-batch and small-scale production, and is suitable for popularization.

The invention also provides a wear-resistant material prepared by adopting the silk powder synchronous feeding additive manufacturing method,

wherein, in some embodiments, the chemical composition and weight percent of the wire may be: less than or equal to 0.4 percent of C, less than or equal to 1.8 percent of Si, less than or equal to 2.0 percent of Mn, less than or equal to 0.012 percent of P, less than or equal to 0.012 percent of S, less than or equal to 1.5 percent of Cr, less than or equal to 0.65 percent of Mo, less than or equal to 1.0 percent of Ni, and the balance of Fe;

in other embodiments, the wire may have a chemical composition and weight percent of: less than or equal to 0.2 percent of C, less than or equal to 0.9 percent of Si, less than or equal to 1.4 percent of Mn, less than or equal to 0.015 percent of P, less than or equal to 0.015 percent of S, less than or equal to 0.5 percent of Cr, less than or equal to 0.1 percent of Mo, and the balance of Fe; but not limited thereto, the invention aims to make the reinforcing phase better combined with the base material by the synchronous feeding of the wire powder, and the wire material suitable for the invention can be applied to other alloy steels besides the iron-based wear-resistant steel and the common iron-based steel.

The powder material comprises WC, and the tungsten carbide powder material can be pure tungsten carbide powder or tungsten carbide powder with the purity of more than 99%.

Tungsten carbide has a relative molecular mass of 195.86. Relative density 15.6 (18/4 ℃), melting point 2600 ℃, boiling point 6000 ℃, mohs hardness 9. The wetting angle of WC and iron-based metal is 0, the WC is well metallurgically bonded with the metal matrix, and compared with other carbides, the WC is easy to obtain and has low economic cost. WC is therefore selected as the reinforcing phase in this embodiment.

In some embodiments, the melting device adopts a laser heat source, the laser power is 500-2000W, 2000-6000W or 6000-30000W, and the scanning speed of the laser can be 30-300mm/min, 300-1200mm/min, 1200-6000mm/min according to the actual requirement and the applicable power can be selected. The diameter of the wire is 0.6-3.2mm, the wire feeding speed of the wire is 30-500mm/min, 500-2000mm/min and 2000-10000mm/min, the size of the powder is 40-300 mu m and 750-1200 mu m, and the powder accounts for not more than 80% of the whole mass fraction of the cladding metal.

The wear-resistant material provided by the invention is further illustrated by the following specific examples.

The first embodiment is as follows:

the manufacturing method of the wear-resistant steel material of the embodiment includes the following steps:

the first step is as follows: modeling is carried out in a computer, and machining allowance and deformation allowance are reserved according to model requirements.

The second step: the prepared wire comprises the following components: 0.25%, si:1.0%, mn:1.3%, cr:0.5%, ni:0.2%, al:0.015%, P:0.01%, S:0.005%, and the balance Fe. In order to reduce the laser loss, some elements were slightly higher than the target content, and the wire diameter was 1.2mm.

The third step: and (4) preparing WC powder. The size range of the WC powder is 150-300 mu m.

The fourth step: and (3) performing additive manufacturing, blowing WC powder into a molten pool, and adopting nitrogen protection in the printing process, wherein the laser power is 3000W, the scanning speed is 420mm/min, the wire feeding speed is 2500mm/min, and the powder feeding rate is 100g/min.

The fifth step: the quenching and tempering heat treatment process comprises the steps of heating to 910 ℃ and keeping the temperature for 1.3min/mm, then cooling with water, and heating to 220 ℃ and keeping the temperature for 4min/mm, and then cooling with air.

And a sixth step: and carrying out subsequent processing according to the target workpiece.

Experiment example two:

The second step is that: the prepared wire comprises the following components: 0.20%, si:0.35%, mn:1.35%, cr:0.35%, ti:0.027%, B:0.0012%, al:0.035%, P is less than or equal to 0.020%, S is less than or equal to 0.003%, and the balance is Fe. In order to reduce the laser loss, some elements were slightly higher than the target content, and the wire diameter was 1.2mm.

The third step: and (4) preparing WC powder. The particle size of the WC powder is 300 meshes.

The fourth step: during the printing and cladding process, adopting argon protection, blowing WC powder into a molten pool, wherein the laser power is 1500W, the scanning speed is 300mm/min, the wire feeding speed is 1.2m/min, and the powder feeding rate is 15g/min.

The fifth step: the heat treatment process is carried out by water cooling after quenching at 940 ℃ for 1.4min/mm, tempering at 250 ℃ for 4.2min/mm and air cooling.

And a sixth step: and cutting and polishing according to the model.

Experiment example three:

The second step: the prepared wire comprises the following components: 0.23%, si:0.35%, mn:1.50%, cr:0.37%, ti:0.035%, B:0.0020%, al:0.045%, P is less than or equal to 0.018%, S is less than or equal to 0.003%, and the balance is Fe. In order to reduce the laser loss, some elements were slightly higher than the target content, and the wire diameter was 1.2mm.

The third step: and preparing WC powder. The particle size of the WC powder is 200 meshes.

The fourth step: and in the printing and cladding process, adopting vacuum protection, blowing WC powder into a molten pool, wherein the laser power is 3000W, the scanning speed is 400mm/min, the wire feeding speed is 1.8m/min, and the powder feeding rate is 20g/min.

The fifth step: the heat treatment process is adopted, wherein the heat treatment process comprises water cooling after quenching at 880 ℃ for 1.45min/mm and air cooling after tempering at 280 ℃ for 4.5 min/mm.

And a sixth step: and cutting and polishing according to the model.

Example four:

the embodiment can also directly adopt a laser cladding technology to form a new composite coating on the surface of a finished device in an accumulation way so as to enhance the hardness, tensile strength and wear resistance of the device. The following description will be made by taking a Q235 steel sheet as an example.

The first step is as follows: preparing the wire components. The composition of the wire is C:0.195%, si:0.37%, mn:1.47%, cr:0.27%, ti:0.033%, B:0.0022%, al:0.044 percent, P is less than or equal to 0.018 percent, S is less than or equal to 0.003 percent, and the balance is Fe, and the diameter of the wire is 1.2mm.

The second step: preparing powder components. The powder material comprises WC with a particle size of 230 meshes.

The third step: the Q235 steel plate is subjected to surface treatment to remove impurities.

The fourth step: performing laser cladding, and blowing WC powder into the molten pool. The laser power is 2300W, the scanning speed is 300mm/min, the wire feeding speed is 1.4m/min, and the powder feeding rate is 25g/min.

The products of the above examples 1 to 4 were tested by a friction and wear test method in reference to GB/T39254-2020, "general rules for evaluating mechanical properties of metal parts for additive manufacturing", and a UMT-3 friction and wear tester was used to perform the friction and wear test under room temperature conditions, wherein the test conditions are as follows: the load is 10kg, the abrasion time is 30min, the abrasion frequency is 10HAZ, and the grinding material is GCr15 steel balls (55 HRC). The test results are shown in Table 1.

TABLE 1

	Relative wear resistance at room temperature
		Example one	Relative NM450 is 2.5 times
Example two	Relative NM450 is 2.1 times
		EXAMPLE III	Relative NM450 is 2 times
Example four	Relative NM450 is 1.2 times

In a conventional method for manufacturing a tungsten carbide wear-resistant material or a tungsten carbide wear-resistant layer, tungsten carbide powder is generally laid on a surface to be strengthened, and then high-temperature sintering is performed to form a wear-resistant material layer. However, this method has a problem that tungsten carbide and an iron-based material cannot be well bonded. In some application occasions with low requirements on wear resistance, cost is unnecessarily wasted due to the use of pure tungsten carbide wear-resistant materials. By adopting the method provided by the invention, the content of the tungsten carbide in the wear-resistant material can be controlled according to the actual requirement of the wear-resistant performance, so that the wear-resistant material with the most suitable content of the tungsten carbide can be obtained through experiments, and the optimal solution can be achieved on the requirements of cost and performance so as to control the material cost.

In summary, compared with the prior art, the synchronous feeding additive manufacturing method of the wire powder and the wear-resistant material provided by the invention combine the advantages of two feeding modes of the powder and the wire material, the components and the proportion of the material reinforcing phase and the thickness of the deposition layer can be better controlled in the additive manufacturing process, the performance of the material is greatly improved, and the limitation of wire material preparation can be avoided. The powder feeding amount and the feeding components can be adjusted in real time through the powder feeding spray heads, and a plurality of powder feeding spray heads are arranged to feed different types of reinforced phase powder materials, so that the waste of raw materials is reduced, and the cost is reduced.

In addition, it will be appreciated by those skilled in the art that, although there may be many problems with the prior art, each embodiment or aspect of the present invention may be improved only in one or several respects, without necessarily simultaneously solving all the technical problems listed in the prior art or in the background. It will be understood by those skilled in the art that nothing in a claim should be taken as a limitation on that claim.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and these modifications or substitutions do not depart from the spirit of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. The method for manufacturing the additive through synchronous feeding of the silk powder is characterized by comprising the following steps of:

2. The method for manufacturing the additive by synchronously feeding the silk powder according to claim 1, wherein the method comprises the following steps: the method of designing a print path includes:

3. The method for manufacturing the additive by synchronously feeding the silk powder according to claim 1, wherein the method comprises the following steps: the melting device comprises one or more of a laser heat source, an electric arc heat source, a laser electric arc composite heat source, an electron beam heat source or a plasma heat source.

4. The method for manufacturing the additive by synchronously feeding the silk powder according to claim 1, wherein the method comprises the following steps: inert gas or vacuum protection is adopted in the cladding deposition process;

5. The method for manufacturing the additive by synchronously feeding the silk powder and the additive according to claim 1, wherein the method comprises the following steps: and also comprises heat treatment after the finished product is formed.

6. The method for manufacturing the additive by synchronously feeding the silk powder according to claim 1, wherein the method comprises the following steps: the powder comprises one or more of WC, W, siC or TiB 2.

7. The method for manufacturing the additive by synchronously feeding the silk powder according to claim 1, wherein the method comprises the following steps: the wire comprises the following chemical components in percentage by weight: less than or equal to 0.4 percent of C, less than or equal to 1.8 percent of Si, less than or equal to 2.0 percent of Mn, less than or equal to 0.012 percent of P, less than or equal to 0.012 percent of S, less than or equal to 1.5 percent of Cr, less than or equal to 0.65 percent of Mo, less than or equal to 1.0 percent of Ni, and the balance of Fe;

the powder includes WC.

8. The method for manufacturing the additive by synchronously feeding the silk powder according to claim 1, wherein the method comprises the following steps: the melting device adopts a laser heat source, the laser power is 500-2000W, 2000-6000W and 6000-30000W, and the scanning speed of the laser is 30-300mm/min, 300-1200mm/min and 1200-6000mm/min.

9. The method for manufacturing the additive by synchronously feeding the silk powder according to claim 1, wherein the method comprises the following steps: the diameter of the wire is between 0.6 and 3.2mm, the wire feeding speed of the wire is between 30 and 500mm/min, 500 and 2000mm/min and 2000 and 10000mm/min, and the powder feeding rate of the powder is between 2 and 30g/min.

10. The method for manufacturing the additive by synchronously feeding the silk powder according to claim 1, wherein the method comprises the following steps: the size of the powder is between 40 and 300 mu m and between 750 and 1200 mu m, and the mass fraction of the powder in the whole metal after cladding is between 10 and 80 percent.