Substrate preheating and heat preservation-free superhard corrosion-resistant laser cladding material as well as preparation method, use equipment and use method of substrate preheating and heat preservation-free superhard corrosion-resistant laser cladding material

Abstract

The invention discloses a superhard corrosion-resistant laser cladding material free of matrix preheating and heat preservation, a preparation method, using equipment and a using method. The material comprises the following components in percentage by weight: 1.8%-1.9% of C, 1.2%-1.32% of Mn, 14.1%-14.5% of Cr, 1.5%-1.8% of Mo, 0.6%-0.8% of V, 1.35%-1.52% of W and the balance of Fe. The preparation method of the material comprises the following steps: mixing according to the ratio, ball-milling and drying. The equipment comprises a cladding spray head, a six-axis mechanical arm, a heating device, a powder feeder and the like. The preparation method of the coating comprises the following steps that a base body is pretreated and fixed, a laser program and cladding parameters are set, protective gas and cladding powder are heated, and after the temperature is stable, a mechanical arm is operated to complete the cladding process. The material disclosed by the invention has remarkable hardness and corrosion resistance; by heating the protective gas and the cladding powder, the molten pool can be subjected to heat preservation, insufficient melting is avoided, the continuous storage time of the molten pool is prolonged, gas in the solidification process fully floats upwards, and the porosity and the cracking tendency can be reduced.

Description

Technical Field

[0001] The invention relates to a super-hard and corrosion-resistant laser cladding material which is free of substrate preheating and heat preservation, a preparation method, use equipment and a use method. Background Art

[0002] Laser cladding is a surface modification technology that uses a high-energy-density laser beam to melt powder materials and rapidly solidify with the substrate surface to form a metallurgically bonded coating. Laser cladding technology has the characteristics of high metallurgical bonding strength between the coating and the substrate and low dilution rate. Due to the fast scanning speed and small heat input, the cladding layer has a low dilution rate, high surface hardness, good wear resistance and a small heat-affected area on the substrate. It is often used for repairing damaged parts, wear-resistant surface modification, creating customized coatings, repairing high-value parts, aerospace and defense applications, and automotive applications.

[0003] In actual industrial applications, laser cladding of superhard materials (hardness greater than 50HRC) is difficult and is prone to cracking during the production process, resulting in a very complicated process. It usually involves auxiliary means such as preheating before and after and ultrasonic assistance, resulting in a long production cycle and high cost for laser cladding of superhard materials.

[0004] The patent specification with the publication number CN119061397A discloses a laser cladding alloy powder for the surface of mold steel, and its components and contents are: C: 0.60-0.64wt.%; W: 1.9-2.1wt.%; Cr: 3.9-4.1wt.%; Nb: 0.75-0.85wt.%; Mn: 0.9-1.1wt.%; V: 0.9-1.0wt.%; Mo: 2.4-2.6wt.%; Ni: 0.08-0.12wt.%; Preparation method: conventionally smelt into a melt according to the raw material ratio and mix evenly; prepare into a cladding powder; dry; naturally cool to room temperature and then standby. Usage method: sieve the cladding powder; add the cladding powder with a particle size of 5-60um into the powder feeding cylinder; set the working parameters of the selective laser melter; clean the surface of the mold substrate to be processed; preheat the mold substrate; start the selective laser melter. The mechanical properties of the laser cladding layer on the mold surface of the present invention are as follows: tensile strength ≥ 1800MPa, yield strength ≥ 1100MPa, elongation at break A ≥ 8%, microhardness ≥ 410HV at room temperature after heat treatment at 620℃, impact energy ≥ 110J, and the service life is nearly twice that of the mold substrate. The patented technology does not take measures to reduce the cooling rate of the molten pool during the laser cladding process. The rapid decrease in the molten pool temperature may lead to insufficient melting of the cladding powder and the occurrence of surface defects such as cracks caused by uneven organizational structure.

[0005] The patent specification with the publication number CN118880315A discloses an ultrasonic-assisted laser cladding device including a frame, a workbench, a laser cladding nozzle, a plane moving mechanism and an ultrasonic vibrator; the workbench is mounted on the frame; the laser cladding nozzle is mounted on the frame, and the laser cladding nozzle is arranged above the workbench; the plane moving mechanism can drive the workbench and the laser cladding nozzle to move relative to each other on a two-dimensional plane; the ultrasonic vibrator is mounted on the workbench to drive the workbench to vibrate. This patented technology can intensify the stirring and flow of liquid inside the melt through ultrasonic-assisted laser cladding, thereby homogenizing the cladding layer structure and reducing the solidification stress generated by different solidification shrinkage between the parts, but this technology cannot slow down the cooling rate of the molten pool, and may cause the problem of insufficient melting of the cladding powder. Summary of the invention

[0006] The present invention provides a super-hard and corrosion-resistant laser cladding material that does not require substrate preheating and heat preservation, a preparation method, use equipment and a use method.

[0007] The technical solution adopted by the present invention to solve the above technical problems is:

[0008] A superhard corrosion-resistant laser cladding material without substrate preheating and heat preservation, the components and contents of which are: C: 1.8%-1.9%, Mn: 1.2%-1.32%, Cr: 14.1%-14.5%, Mo: 1.5%-1.8%, V: 0.6%-0.8%, W: 1.35%-1.52%, and the balance is Fe.

[0009] A method for preparing a superhard and corrosion-resistant laser cladding material without substrate preheating and heat preservation, comprising the following steps:

[0010] S1. Prepare cladding powder according to the composition and content ratio of C: 1.8% to 1.9%, Mn: 1.2% to 1.32%, Cr: 14.1% to 14.5%, Mo: 1.5% to 1.8%, V: 0.6% to 0.8%, W: 1.35% to 1.52%, and the balance is Fe;

[0011] S2, placing the obtained cladding powder into a ball mill for ball milling;

[0012] S3, drying the cladding powder obtained in step S2.

[0013] Preferably, in step S3, the drying temperature is controlled at 75° C. to 85° C., and the drying time is not less than 1.5 h.

[0014] A use equipment of super-hard corrosion-resistant laser cladding materials without substrate preheating and heat preservation, comprising a workbench, a six-axis robot arm adjacent to the workbench, a gas source, a heating device and a powder feeder, the six-axis robot arm is provided with a cladding nozzle, and the cladding nozzle is operated by a robot controller; the heating device comprises three air inlets and three air outlets, the powder feeder comprises one inlet and two outlets, the gas source is divided into two paths, one of which is connected to the powder feeder as powder feeding gas, and the other is connected to one of the air inlets of the heating device as protective gas; after the powder feeding gas enters the powder feeder, the powder feeder outlet is split into two paths of cladding powder entering the heating device, and at the same time, one path of pure protective gas enters the heating device, after heating, the cladding powder is split into four paths of cladding powder flow connected to the cladding nozzle, and a cladding powder flow is formed after passing through the cladding nozzle, and the heated protective gas vertically enters the cladding nozzle.

[0015] Preferably, a thermocouple temperature controller is provided in the heating device; and the gas-conducting metal tube of the heating device is spirally coiled.

[0016] Preferably, the laser beam emitted by the cladding nozzle is a flat-top beam.

[0017] A method for using a super-hard and corrosion-resistant laser cladding material without substrate preheating and heat preservation, using equipment for using the super-hard and corrosion-resistant laser cladding material without substrate preheating and heat preservation, comprising the following steps:

[0018] S1. Sandblast the surface of the base material, clean it with ethanol, blow it dry with an air gun, and finally fix the base material on the laser cladding workbench;

[0019] S2, set the laser program, determine the cladding line and the starting and ending points of the cladding process, calibrate the cladding line, and determine whether the base material is parallel to the laser line;

[0020] S3, adding cladding powder into the powder feeder and setting the powder feeding rate;

[0021] S4, open the valve of the shielding gas source and set the gas pressure, open the powder feeder, and introduce shielding gas and powder feeding gas mixed with cladding powder into the heating device;

[0022] S5. After the airflow is stable, turn on the heating device and set the temperature controller to the target temperature;

[0023] S6. After the heating temperature is stabilized, the heated protective gas and cladding powder flow out from the gas outlet of the heating device, and the robot arm controller is operated to complete the laser cladding process.

[0024] Preferably, in step S2, the cladding line overlap rate is set to 80%.

[0025] Preferably, in step S3, the powder feeder has a powder feeding amount of 6 to 13 g / min, the protective gas is helium, nitrogen or argon, and the gas pressure is 0.2 to 1 MPa.

[0026] Preferably, in step S5, the heating range of the protective gas and the powder feeding gas by the heating device is 200-800°C; and in step S6, the laser power of the laser beam is 2000W-4000W.

[0027] Compared with the prior art, the device and method for using the ultra-hard and corrosion-resistant laser cladding material without substrate preheating and heat preservation of the present invention can further insulate the molten pool by heating the protective gas to 200-800°C, prolong the molten pool duration, make the gas in the solidification process fully float, reduce the porosity, improve the uniformity of the organizational structure, and reduce the tendency to crack; at the same time, the cladding powder coming out of the powder feeder is heated so that after it enters the cladding nozzle, the cladding powder has a high temperature after heating, and after entering the molten pool, it can avoid insufficient melting caused by the lowering of the molten pool temperature. At the same time, the molten pool duration is extended, the gas in the solidification process is fully floated, the porosity is reduced, the uniformity of the organizational structure is improved, the cracking tendency is reduced, the substrate preheating and the insulation after cladding are avoided, the insulation and heat treatment equipment are reduced, the overall processing time is reduced, and the lower laser power can be used by heating the cladding powder, which is energy-saving and environmentally friendly; the internal microstructure of the formed coating is uniformly distributed, the hardness can reach 721HV, the corrosion potential (Ecorr) can reach -0.36V, and the self-corrosion current density (jcorr) can reach 7.28×10 -7 A / cm -2 . BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 The present invention is a three-dimensional schematic diagram of equipment for using the ultra-hard, corrosion-resistant laser cladding material without substrate preheating and heat preservation.

[0029] Figure 2 This is a microstructure diagram of the coating of Example 1 of the present invention.

[0030] Among them: 1. Cladding powder flow; 2. Laser beam; 3. Cladding nozzle; 4. Heating device; 5. Workbench; 6. Powder feeder; 7. Gas source; 8. Six-axis robotic arm. DETAILED DESCRIPTION

[0031] The present invention is further described in detail below with reference to the accompanying drawings.

[0032] A superhard corrosion-resistant laser cladding material without substrate preheating and heat preservation, the components and contents of which are: C: 1.8%-1.9%, Mn: 1.2%-1.32%, Cr: 14.1%-14.5%, Mo: 1.5%-1.8%, V: 0.6%-0.8%, W: 1.35%-1.52%, and the balance is Fe.

[0033] A method for preparing a superhard and corrosion-resistant laser cladding material without substrate preheating and heat preservation, comprising the following steps:

[0034] S1. Prepare cladding powder according to the composition and content ratio of C: 1.8% to 1.9%, Mn: 1.2% to 1.32%, Cr: 14.1% to 14.5%, Mo: 1.5% to 1.8%, V: 0.6% to 0.8%, W: 1.35% to 1.52%, and the balance is Fe;

[0035] S2, placing the obtained cladding powder into a ball mill for ball milling;

[0036] S3. Dry the cladding powder obtained in step S2, control the drying temperature to be between 75° C. and 85° C., and the drying time to be not less than 1.5 h.

[0037] like Figure 1 to Figure 2 As shown, a super-hard corrosion-resistant laser cladding material using equipment without substrate preheating and heat preservation includes a workbench 5, a six-axis robot 8 adjacent to the workbench 5, a gas source 7, a heating device 4 and a powder feeder 6, the six-axis robot 8 is provided with a cladding nozzle 3, and the cladding nozzle 3 is operated by a robot controller; the heating device 4 includes three air inlets and three air outlets, the powder feeder 6 includes one inlet and two outlets, the gas source 7 is divided into two paths, one of which is connected to the powder feeder 6 as powder feeding gas, and the other is directly connected to one of the air inlets of the heating device 4 as protective gas; after the powder feeding gas enters the powder feeder 6, the outlet of the powder feeder 6 is split into two paths of cladding powder entering the heating device 4, and at the same time, a pure protective gas enters the heating device 4, after heating, the cladding powder is split into four paths of cladding powder flow connected to the cladding nozzle 3, and a cladding powder flow 1 is formed after passing through the cladding nozzle 3, and the cladding powder flow 1 is directed toward the substrate surface, and the heated protective gas vertically enters the cladding head and is sprayed onto the substrate surface.

[0038] The laser beam 2 emitted by the cladding nozzle 3 is a flat-top beam. The heating device 4 can control the start and stop of the heating component through a thermocouple temperature controller to achieve precise temperature control, and the gas temperature control range can reach 200°C to 800°C. The gas-conducting metal pipe of the heating device 4 is spirally coiled to increase the heating stroke while reducing the volume of the device. The stroke length ensures that the particle temperature range can reach 200°C to 800°C; the gas-conducting metal pipe material is a high-temperature resistant metal material, which can be a nickel-based high-temperature alloy, an iron-based high-temperature alloy, etc.

[0039] A method for using a superhard, corrosion-resistant laser cladding material without substrate preheating and heat preservation comprises the following steps:

[0040] S1. The surface of the base material is sandblasted, then cleaned with ethanol and dried with an air gun, and finally the base material is fixed on the laser cladding workbench 5. The specific composition of the base material can be at least one of iron, titanium, nickel, copper, magnesium, and an alloy, and the alloy contains one or more of iron, titanium, nickel, copper, and magnesium;

[0041] S2. Set the laser program, determine the cladding line and the starting and ending points of the cladding process, calibrate the cladding line, and determine whether the base material is parallel to the laser line; set the cladding line overlap rate to 80%.

[0042] S3. Add the cladding powder into the powder feeder 6 and set the powder feeding rate; the powder feeding amount of the powder feeder 6 is 6-13 g / min, the protective gas is helium, nitrogen or argon, and the gas pressure is 0.2-1 MPa.

[0043] S4, open the valve of the protective gas source 7 and set the gas pressure, open the powder feeder 6, and introduce the protective gas and the powder feeding gas mixed with the cladding powder into the heating device 4;

[0044] S5. After the airflow is stable, turn on the heating device 4 and set the temperature controller to the target temperature; the heating range of the heating device 4 for the protective gas and the powder feeding gas is 200-800°C.

[0045] S6. After the heating temperature is stabilized, the heated protective gas and cladding powder flow out from the outlet of the heating device 4. The robot arm controller is operated to complete the laser cladding process. The laser power of the laser beam is 2000W~4000W. After being irradiated by the laser beam 2 of the cladding nozzle 3, it becomes a molten state and is clad on the surface of the substrate. After cooling, the desired coating is formed on the substrate material. After the substrate material cools to room temperature, the substrate material is removed.

[0046] Sand blasting can remove the oxide layer on the surface of the substrate, increase the surface roughness and create good mechanical biting conditions.

[0047] The device and method for using the ultra-hard and corrosion-resistant laser cladding material without substrate preheating and heat preservation of the present invention can further keep the molten pool warm, prolong the molten pool duration, make the gas in the solidification process fully float, reduce porosity, improve the uniformity of the organizational structure, and reduce the tendency to crack; at the same time, the cladding powder coming out of the powder feeder 6 is heated so that it acts on the molten pool after entering the cladding nozzle 3. After heating, the cladding powder has a high temperature. After entering the molten pool, it can avoid insufficient melting caused by the lowering of the molten pool temperature. The molten pool duration is extended to allow the gas to fully float during the solidification process, reduce porosity, improve the uniformity of the organizational structure, reduce the tendency to crack, avoid preheating of the substrate before cladding and insulation after cladding, reduce insulation and heat treatment equipment, and reduce the overall processing time. By heating the cladding powder, a lower laser power can be used, which plays a role in energy saving and environmental protection. The internal microstructure of the formed coating is uniformly distributed, the hardness can reach 721HV, the corrosion potential (Ecorr) can reach -0.36V, and the self-corrosion current density (jcorr) can reach 7.28×10 -7 A / cm -2 .

[0048] Example 1

[0049] According to the method for using the above-mentioned super-hard corrosion-resistant laser cladding material without substrate preheating and insulation, the protective gas and cladding powder are heated to 200°C, the gas pressure is set to 0.5MPa, the defocus is 1mm, and the laser power is set to 3000W; the substrate material is Q235 steel, and the cladding material is the material described in the present invention.

[0050] Comparative Example 1

[0051] The operation was carried out according to the implementation process of traditional laser cladding. The shielding gas and the cladding powder were not heated, that is, the shielding gas and the cladding powder were at room temperature. The cladding material was 440C stainless steel. Other parameters were consistent with those in Example 1. The microstructure morphology and mechanical properties of the coatings in Example 1 and Comparative Example 1 are shown in Table 1.

[0052] Table 1

[0053]

[0054]

[0055] The experimental results show that the hardness of the coating prepared by the material of the present invention can reach 721HV, while the hardness of the coating prepared by 440C stainless steel is only 580HV. The results show that the material of the present invention has significant hardness; and the microstructure of the coating is evenly distributed, which is mainly attributed to the high temperature of the cladding powder after heating. After entering the molten pool, it can avoid insufficient melting caused by the decrease in the molten pool temperature, extend the molten pool existence time, improve the uniformity of the organizational structure, and reduce the tendency to crack; when the microstructure morphology is observed using an optical microscope, no cracks appear compared to comparative example 1, because the heated gas covers the molten pool, keeps the molten pool warm, can reduce the cooling rate of the molten pool, extend the molten pool existence time, make the gas in the solidification process float up, reduce the porosity, and improve the uniformity of the organizational structure, and reduce the tendency to crack.

[0056] Example 2

[0057] The sample obtained in Example 1 was placed in a 3.5 wt. % NaCl solution at room temperature for electrochemical experiments.

[0058] Comparative Example 2

[0059] The sample obtained in Comparative Example 1 was placed in a 3.5 wt.% NaCl solution at room temperature for electrochemical experiments. The relevant parameters of Example 2 and Comparative Example 2 were obtained by analyzing the potentiodynamic polarization curves as shown in Table 2.

[0060] Table 2

[0061]

[0062] The corrosion potential (Ecorr) reflects the ease with which the metal surface loses electrons in the presence of an electrolyte, while the corrosion current density (jcorr) is related to the flow of electrons during the corrosion process. According to electrochemical theory, the smaller the self-corrosion current density (jcorr), the stronger the corrosion resistance of the material; the more positive the corrosion potential (Ecorr), the smaller the corrosion tendency of the material and the better the corrosion resistance; conversely, the worse the corrosion resistance. The experimental results show that the material described in the present invention has a corrosion potential (Ecorr) of -0.36V and -0.48V respectively, compared with the 440C stainless steel coating, the more positive the corrosion potential (Ecorr), the smaller the corrosion tendency of the material and the better the corrosion resistance; the self-corrosion current density (jcorr) is 7.28×10 -7 A / cm -2 and 1.26×10 -6 A / cm -2 , the smaller the self-corrosion current density (jcorr), the stronger the corrosion resistance of the material. In summary, it can be found that the corrosion resistance of the coating prepared by the present material is greatly improved compared with the 440C stainless steel coating, indicating that the laser cladding coating prepared by the material of the present invention has significant corrosion resistance.

[0063] Example 3

[0064] According to the method of using the above-mentioned ultra-hard corrosion-resistant laser cladding material that does not require substrate preheating and insulation, the protective gas and cladding powder are heated to 200°C, the gas pressure is set to 0.5MPa, the defocus is 1mm, the laser power is set to 1000W, the substrate material is Q235 steel, and the cladding powder is the material described in the present invention.

[0065] Comparative Example 3

[0066] The shielding gas and the cladding powder are not heated, the gas pressure is set to 0.5 MPa, the defocus is 1 mm, the laser power is set to 1000 W, the substrate material is Q235 steel, and the cladding powder is the material described in the present invention. Other parameters are consistent with Example 3. The microstructure and mechanical properties of the coating of Example 3 Comparative Example 3 are shown in Table 3.

[0067] Table 3

[0068]

[0069] The experimental results show that under the condition of lower laser power, the coating hardness is increased from 523HV to 635HV compared with that of comparative example 3. It can be found that the hardness of the coating has been greatly improved. By observing the surface morphology of the coating, it is found that the surface of the coating prepared by the protective gas and cladding powder after heating is smooth, and no obvious unmelted powder is seen. The surface quality of the coating of comparative example 3 without heating is poor, and spherical protrusions are produced due to incomplete melting of the powder. It can be concluded that the temperature of the cladding particles is high after heating. After entering the molten pool, it can avoid incomplete melting caused by the decrease of the molten pool temperature and prolong the molten pool existence. time, improve the uniformity of the organizational structure, reduce the tendency to crack, and at the same time, avoid preheating of the substrate before cladding and insulation after cladding, reduce insulation and heat treatment equipment, and reduce the overall processing time. The experimental results show that a lower laser power can be used by heating the cladding powder, which plays a role in energy saving and environmental protection and provides a new method for the preparation of coatings of materials with limited laser power; in addition, the heated gas covers the molten pool, so that the molten pool is kept warm, which can reduce the cooling rate of the molten pool, extend the survival time of the molten pool, make the gas float in the solidification process, reduce the porosity, and improve the uniformity of the organizational structure and reduce the tendency to crack.

[0070] Finally, it should be noted that the above embodiments only illustrate the technical solutions of the present invention, rather than limiting it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A super-hard and corrosion-resistant laser cladding material without substrate preheating and heat preservation, characterized in that: Its components and contents are: C: 1.8%-1.9%, Mn: 1.2%-1.32%, Cr: 14.1%-14.5%, Mo: 1.5%-1.8%, V: 0.6-0.8%, W: 1.35%-1.52%, and the balance is Fe.

2. A method for preparing a superhard and corrosion-resistant laser cladding material without substrate preheating and heat preservation, characterized in that: The following steps are involved: S1. Prepare cladding powder according to the composition and content ratio of C: 1.8% to 1.9%, Mn: 1.2% to 1.32%, Cr: 14.1% to 14.5%, Mo: 1.5% to 1.8%, V: 0.6% to 0.8%, W: 1.35% to 1.52%, and the balance is Fe; S2, placing the obtained cladding powder into a ball mill for ball milling; S3, drying the cladding powder obtained in step S2.

3. The method for preparing a superhard and corrosion-resistant laser cladding material without substrate preheating and heat preservation according to claim 2, characterized in that: In step S3, the drying temperature is controlled at 75° C. to 85° C., and the drying time is not less than 1.5 h.

4. An equipment for using ultra-hard and corrosion-resistant laser cladding materials without substrate preheating and heat preservation, characterized in that: The invention comprises a workbench (5), a six-axis robot arm (8) adjacent to the workbench (5), an air source (7), a heating device (4) and a powder feeder (6); the six-axis robot arm (8) is provided with a cladding nozzle (3), and the cladding nozzle (3) is operated by a robot controller; the heating device (4) comprises three air inlets and three air outlets, the powder feeder (6) comprises one inlet and two outlets, the air source (7) is divided into two paths, one of which is connected to the powder feeder (6) for The powder feeding gas is another path connected to one of the air inlets of the heating device (4) as the protective gas; after the protective gas enters the powder feeder (6), the outlet of the powder feeder (6) is split into two paths of cladding powder entering the heating device (4), and at the same time, one path of pure protective gas enters the heating device (4); after heating, the cladding powder is split into four paths of cladding powder flow connected to the cladding nozzle (3), and after passing through the cladding nozzle (3), a cladding powder flow (1) is formed, and the heated protective gas vertically enters the cladding nozzle.

5. The equipment for using the superhard corrosion-resistant laser cladding material without substrate preheating and heat preservation according to claim 4 is characterized in that: A thermocouple temperature controller is arranged in the heating device (4); and the gas-conducting metal tube of the heating device (4) is spirally coiled.

6. The equipment for using the superhard corrosion-resistant laser cladding material without substrate preheating and heat preservation according to claim 4 is characterized in that: The laser beam (2) emitted by the cladding nozzle (3) is a flat-top beam.

7. A method for using a super-hard and corrosion-resistant laser cladding material without substrate preheating and heat preservation, using the equipment for using the super-hard and corrosion-resistant laser cladding material without substrate preheating and heat preservation as claimed in any one of claims 4 to 6, characterized in that: The following steps are involved: S1, sandblasting the surface of the base material, then cleaning it with ethanol and drying it with an air gun, and finally fixing the base material on the laser cladding workbench (5); S2, set the laser program, determine the cladding line and the starting and ending points of the cladding process, calibrate the cladding line, and determine whether the base material is parallel to the laser line; S3, adding the cladding powder into the powder feeder (6) and setting the powder feeding rate; S4, opening the valve of the protective gas source (7) and setting the gas pressure, opening the powder feeder (6), and introducing the protective gas and the powder feeding gas mixed with the cladding powder into the heating device (4); S5. After the airflow is stable, turn on the heating device (4) and set the temperature controller to the target temperature; S6. After the heating temperature is stabilized, the heated protective gas and cladding powder flow out from the gas outlet of the heating device (4), and the robot arm controller is operated to complete the laser cladding process.

8. The method for using the superhard corrosion-resistant laser cladding material without substrate preheating and heat preservation according to claim 7, characterized in that: In step S2, the cladding line overlap rate is set to 80%.

9. The method for using the superhard corrosion-resistant laser cladding material without substrate preheating and heat preservation according to claim 7, characterized in that: In step S3, the powder feeding amount of the powder feeder (6) is 6-13 g / min, the protective gas is helium, nitrogen or argon, and the gas pressure is 0.2-1 MPa.

10. The method for using the superhard corrosion-resistant laser cladding material without substrate preheating and heat preservation according to claim 7, characterized in that: In step S5, the heating range of the protective gas and the powder feeding gas heated by the heating device (4) is 200-800°C; in step S6, the laser power of the laser beam is 2000W-4000W.

Images