Preparation method of high-rust-resistance flux-cored wire

Abstract

The invention relates to the technical field of flux-cored wires, and discloses a high-rust-resistance flux-cored wire preparation method which comprises the following steps of S1, raw material pretreatment, S2, powder adding and forming, S3, surface modification and S4, finished product inspection. Before work is started, a worker prepares raw materials including high-carbon ferrochrome, tungsten carbide, boron carbide, rare-earth metal oxide and ferromolybdenum powder, then grinding equipment is used for grinding the raw materials, then the ground powder is dried for 2-3 hours through equipment at the temperature of 100-150 DEG C, the dryness of the raw materials is guaranteed, and the raw materials are evenly mixed. The method comprises the following steps: firstly, preparing a flux-cored wire, then uniformly stirring by utilizing three-dimensional mixing equipment, and then mixing and proportioning according to different proportions according to a corrosion-resistant flux-cored wire, an acid-base-resistant flux-cored wire and a high-hardness high-temperature-resistant flux-cored wire, so that the welding wires with corresponding properties can be conveniently used according to different environments, and the maximization of the functionality of the welding wire is improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of flux-cored wires, in particular to a preparation method of a high-rust-resistance flux-cored wire. BACKGROUND

[0002] The welding wire is a metal wire material used as a filler metal or for conducting an electric arc during welding, and is melted to form a welding seam to connect workpieces. The flux-cored wire is a welding material filled with a flux material in a tube, and the molten pool is protected by gas and slag combination, and has the characteristics of stable arc, good appearance and high deposition efficiency. The flux provides a stable arc and slag forming function, and forms a gas + molten slag double protective layer, and the tensile strength is better than that of the solid core welding wire. Therefore, the original flux-cored wire with poor filling effect and solid core welding wire, simple and fast manufacturing process, and single filling flux material cannot complete the current high-quality and rapid manufacturing process, which is specifically shown in the following aspects: (1) During the preparation of the flux-cored wire, due to the single material, different working environments cannot be used to manufacture flux-cored wires with different properties, thereby reducing the comprehensiveness of the preparation of the flux-cored wire; (2) During the preparation of the flux-cored wire, only the internal material of the flux-cored wire is considered, the external part is ignored, the external part is easily eroded, and the service life of the flux-cored wire is reduced; (3) After the preparation of the flux-cored wire is completed, only a rough appearance detection is performed on the appearance, the chemical composition, the service life and the weather resistance of the flux-cored wire cannot be comprehensively detected, and the rejection rate of the flux-cored wire is increased. SUMMARY

[0003] The application aims to provide a preparation method of a high-rust-resistance flux-cored wire, so as to solve the problems of the preparation of the flux-cored wire in the background technology, that is, (1) during the preparation of the flux-cored wire, due to the single material, different working environments cannot be used to manufacture flux-cored wires with different properties, thereby reducing the comprehensiveness of the preparation of the flux-cored wire; (2) during the preparation of the flux-cored wire, only the internal material of the flux-cored wire is considered, the external part is ignored, the external part is easily eroded, and the service life of the flux-cored wire is reduced; (3) after the preparation of the flux-cored wire is completed, only a rough appearance detection is performed on the appearance, the chemical composition, the service life and the weather resistance of the flux-cored wire cannot be comprehensively detected, and the rejection rate of the flux-cored wire is increased.

[0004] To achieve the above-mentioned purpose, the application provides the following technical scheme: a preparation method of a high-rust-resistance flux-cored wire, which comprises the following steps: S1, raw material pretreatment S1.1, material determination, prepare one kilogram of raw materials, including ① high carbon chromium iron, ② tungsten carbide, ③ boron carbide, ④ rare earth metal oxide, ⑤ molybdenum iron powder, S1.2, pretreatment, ① mechanical grinding, ② drying for 2-3 hours, temperature is 100-150℃, ③ three-dimensional mixing uniform, S1.3, material ratio, ① high carbon chromium iron 67.5-96.5 parts, ② tungsten carbide 0.3-1 part, ③ boron carbide 0.1-0.5 part, ④ rare earth metal oxide 1.1-1.5 part, ⑤ molybdenum iron powder 0.5-2.5 part, S1.4, steel belt treatment, cold-rolled low-carbon steel belt H08A is cut into 8-14mm wide, cleaned and rolled into U-shaped groove; S2, powder adding and forming S2.1, filling powder in the groove, the filling rate is controlled at 45-55%, S2.2, roller closing, ① steel belt method, ② stage drawing, ③ first drawing, the U-shaped steel belt is closed into a pipe after filling powder, ④ second drawing, nano-copper powder is embedded in titanium shell, the diameter is reduced to target diameter 4mm, S2.3, disc round method production line outlet speed is 600m / min, φ1.2mm specification, real-time monitoring of roller parameters is required to cooperate with computer; S3, surface modification S3.1, copper plating treatment, ① basic welding wire surface is plated with nano-copper layer, ② second drawing makes copper powder embedded in the gap between titanium shells, S4, finished product inspection S4.1, chemical analysis, ① sampling, ② spectroscopic analysis method, S4.2, mechanical property detection, ① deposited metal tensile test, ② impact toughness, charpy impact test machine is used to test low temperature impact absorbed energy at-40℃, S4.3, corrosion resistance detection, ① salt spray test, continuous spraying of 5% NaCl solution, service life is required to be ≥480 hours, ② weathering index, through simulating high altitude and high humidity environment, humidity is required to be >85%, weathering index is verified to be >6.5,

[0005] Preferably, the ingredient content of the anti-corrosion flux-cored wire is high carbon chromium iron: tungsten carbide: boron carbide: rare earth metal oxide: molybdenum iron powder = 96.5 parts: 1 part: 0.5 part; 1 part: 1 part.

[0006] Preferably, the ingredient content of the acid and alkali resistant flux-cored wire is high carbon chromium iron: tungsten carbide: boron carbide: rare earth metal oxide: molybdenum iron powder = 94.9 parts: 1 part: 0.5 part; 1.1 parts: 2.5 parts.

[0007] Preferably, the high hardness and high temperature resistance flux-cored wire is prepared from high carbon chromium iron, tungsten carbide, boron carbide, rare earth metal oxide and molybdenum iron powder in a ratio of 96:1:0.5:1.5:1.

[0008] Preferably, the rolling speed formula of the roller is V=πDn / 60, D is the working diameter of the roller, and the unit is m, which needs to be converted from mm, and n is the rotating speed of the roller, and the unit is revolutions per minute.

[0009] Preferably, the loading coefficient calculation formula of the raw material three-dimensional mixed traditional Chinese medicine core is λ=Wf / Vm*ρm*100%.

[0010] Preferably, in the loading coefficient calculation formula of the raw material three-dimensional mixed traditional Chinese medicine core, λ is the loading coefficient, the recommended range is 55-65%, Wf is the total mass of the mixed medicine core at a time, the unit is kg, which is converted into the actual mass according to the weight fraction of each component in the formula, Vm is the effective volume of the mixer, the unit is m³, and ρm is the loose bulk density of the medicine core powder, the unit is kg / m³.

[0011] Preferably, in the arc voltage loss compensation calculation formula in the arc stability detection of the high rust resistance flux-cored wire, U actual =U output -I*Rc.

[0012] Preferably, in the arc voltage loss compensation calculation formula in the arc stability detection of the high rust resistance flux-cored wire, U output is the set voltage of the welding machine, the unit is V, I is the welding current, the unit is A, and Rc is the cable resistance, the unit is Ω, about 0.01 Ω per 10 m cable.

[0013] Compared with the prior art, the present application has the following advantages: 1、The present application prepares high carbon chromium iron, tungsten carbide, boron carbide, rare earth metal oxide and molybdenum iron powder before starting work, then grinds the raw materials using a grinding device, then dries the ground powder in a device with a temperature of 100-150 DEG C for 2-3 hours to ensure the dryness of the raw materials, then uniformly stirs the raw materials using a three-dimensional mixing device, then mixes the anti-corrosion flux-cored wire, acid and alkali resistance flux-cored wire and high hardness and high temperature resistance flux-cored wire according to different proportions, which facilitates the use of corresponding properties of the wire according to different environments, and maximizes the functionality of the wire.

[0014] 2、The application protects the surface of the welding wire by plating a nano-copper layer on the surface of the base welding wire after drawing forming, then embedding copper powder into the gap between the titanium shell through secondary drawing, forming a uniform protective film through electrostatic adsorption, then adding fluorite and aluminum-magnesium alloy to realize gasless welding weather resistance, then annealing to control toughness, using oxygen-free annealing to eliminate drawing stress, refine grains, prevent chromium / nickel oxidation, maintain the activity of the passivation film, and reduce the risk of core wire moisture absorption, thereby prolonging the service life of the flux-cored wire.

[0015] 3、The application monitors whether the component content of the flux-cored wire meets the standard by using spectral analysis after the preparation of the flux-cored wire is completed, then detects the tensile force by using a deposited metal tensile test, then tests the impact absorption energy at a low temperature of-40℃ by using a charpy impact tester to detect the impact resistance of the welding wire, then continuously sprays 5% NaCl solution, requires service life ≥480 hours, then verifies the weathering index >6.5 by simulating high-altitude high-humidity environment, requires humidity >85%, finally tests the welding current / voltage adaptability, observes the formation state of the molten hole, requires uniform molten hole size, no oxidation on the back weld, and detects the arc stability of the welding wire, through the detection of various physical and chemical properties, the success rate of welding wire preparation and production is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 The preparation flow chart of the high-rust-resistant flux-cored wire of the application; Figure 2 The component content diagram of the high-rust-resistant flux-cored wire of the application; Figure 3 The operation logic code diagram of the three-dimensional mixing equipment in the preparation of the high-rust-resistant flux-cored wire of the application; Figure 4 The operation logic code implementation diagram of the arc stability detection in the preparation of the high-rust-resistant flux-cored wire of the application. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the application.

[0018] Embodiment one: Please refer to Figures 1-4 A preparation method of a high-rust-resistant flux-cored wire, the preparation method comprising the following steps: S1, raw material pretreatment S1.1, material determination, prepare one kilogram of raw materials, including ① high carbon chromium iron, ② tungsten carbide, ③ boron carbide, ④ rare earth metal oxide, ⑤ molybdenum iron powder, S1.2, pretreatment, ① mechanical grinding, ② drying for 2-3 hours, temperature 100-150℃, ③ three-dimensional mixing uniform, S1.3, material ratio, ① high carbon chromium iron 67.5-96.5 parts, ② tungsten carbide 0.3-1 parts, ③ boron carbide 0.1-0.5 parts, ④ rare earth metal oxide 1.1-1.5 parts, ⑤ molybdenum iron powder 0.5-2.5 parts, S1.4, steel belt treatment, cold rolling low carbon steel belt H08A cut into 8-14mm wide, clean and roll into U-shaped groove, before starting work, the staff prepares raw materials high carbon chromium iron, tungsten carbide, boron carbide, rare earth metal oxide and molybdenum iron powder, then use grinding equipment to grind raw materials, then dry the ground powder with a temperature of 100-150℃ for 2-3 hours to ensure the dryness of the raw materials, then use three-dimensional mixing equipment for uniform stirring, then mix according to different proportions of corrosion-resistant flux-cored wire, acid and alkali-resistant flux-cored wire and high-hardness high-temperature-resistant flux-cored wire, so that the corresponding attribute wire can be used according to different environments, and the functionality of the wire is maximized; S2, powder adding and forming S2.1, filling powder in the groove, filling rate control at 45-55%, S2.2, roller closing, ① steel belt method, ② stage drawing, ③ first drawing, U-shaped steel belt filled with powder is closed into a tube, ④ second drawing, nano copper powder embedded with titanium shell, reducing diameter to target diameter 4mm, S2.3, disc round production line outlet speed 600m / min, φ1.2mm specification, need to cooperate with computer real-time monitoring of roller parameters, by adding mixed powder in the rolling groove, its filling rate is controlled at 45-55%, too high will lead to drawing cracking, too low will affect the welding performance, then through the first drawing, the U-shaped steel belt filled with powder is closed into a tube, the core and the shell are preliminarily combined, then through the second drawing, the nano copper powder is embedded with titanium shell, the conductivity and rust prevention ability are enhanced, the diameter is reduced to the target diameter 4mm; S3, surface modification S3.1, copper plating treatment, ① base welding wire surface plated with nano copper layer, ② secondary drawing to make copper powder embedded in titanium shell gap, S3.2, annealing toughness control, adopt oxygen-free annealing, S3.3, surface modifier, ① nano copper powder electrostatic adsorption on the surface of titanium shell, ② add sodium fluoride, after the welding wire is drawn into shape, then the base welding wire surface is plated with nano copper layer, then the secondary drawing makes the copper powder embedded in the titanium shell gap, a uniform protective film is formed by electrostatic adsorption, the surface of the welding wire is protected, then the use of fluorite and aluminum magnesium alloy realizes the weather resistance of gasless welding, then it is annealed to control toughness, oxygen-free annealing is adopted to eliminate drawing stress, refine grains, and prevent chromium / nickel oxidation, maintain the activity of passivation film, then reduce the risk of core wire moisture absorption, thereby improving the service life of the flux-cored wire; S4, finished product inspection S4.1, chemical analysis, ① sampling, ② spectroscopic analysis method, S4.2, mechanical property detection, ① deposited metal tensile test, ② impact toughness, using charpy impact tester to test the impact absorbed energy at low temperature of-40℃, S4.3, corrosion resistance detection, ① salt spray test, continuous spraying of 5% NaCl solution, the service life is required to be≥480 hours, ② weathering index, by simulating high altitude and high humidity environment, the humidity is required to be >85%, the weathering index is verified to be >6.5, S4.4, surface defect detection, ① X-ray detection, ② welding verification, the diffusible hydrogen content of the deposited metal needs to be <5ml / 100g, the welding wire for pressure vessels needs to be forced to detect, ③ arc stability detection, practical operation test welding current / voltage adaptability, observe the formation state of the molten hole, the molten hole size is required to be uniform, and the back weld is required to be non-oxidized, after the preparation of the flux-cored wire is completed, the sample is cut off, then the spectroscopic analysis method is used to monitor whether the composition content of the flux-cored wire meets the standard, then the tensile force is detected by using the deposited metal tensile test, then the impact resistance of the welding wire is detected by using the charpy impact tester to test the impact absorbed energy at low temperature of-40℃, then the service life is required to be≥480 hours by continuous spraying of 5% NaCl solution, then the weathering index is verified to be >6.5 by simulating high altitude and high humidity environment, the humidity is required to be >85%, finally the arc stability of the welding wire is detected by practical operation test welding current / voltage adaptability, observe the formation state of the molten hole, the molten hole size is required to be uniform, and the back weld is required to be non-oxidized, through the detection of various physical and chemical properties, the success rate of welding wire preparation and production is improved.

[0019] In this embodiment: the composition content of the anti-corrosion flux-cored wire is high-carbon chromium iron: tungsten carbide: boron carbide: rare earth metal oxide: molybdenum iron powder = 96.5 parts: 1 part: 0.5 part; 1 part: 1 part.

[0020] In this embodiment: the composition content of the acid and alkali resistant flux-cored wire is high-carbon chromium iron: tungsten carbide: boron carbide: rare earth metal oxide: molybdenum iron powder = 94.9 parts: 1 part: 0.5 part; 1.1 parts: 2.5 parts.

[0021] In this embodiment: the ingredient content of the high hardness and high temperature resistance flux-cored wire is high carbon chromium iron: tungsten carbide: boron carbide: rare earth metal oxide: molybdenum iron powder = 96 parts: 1 part: 0.5 part: 1.5 part: 1 part.

[0022] In this embodiment: the roll rolling speed formula V = πDn / 60, D is the working diameter of the roll, the unit is m, which needs to be converted from mm, n is the rolling speed, the unit is revolutions per minute.

[0023] In this embodiment: the loading coefficient calculation formula of the raw material three-dimensional mixed traditional Chinese medicine core is λ = Wf / Vm*ρm*100%.

[0024] In this embodiment: the loading coefficient calculation formula of the raw material three-dimensional mixed traditional Chinese medicine core is λ = Wf / Vm*ρm*100%.

[0025] In this embodiment: the arc voltage loss compensation calculation formula in the arc stability detection in the high rust resistance flux-cored wire is U actual = U output - I*Rc.

[0026] In this embodiment: the arc voltage loss compensation calculation formula in the arc stability detection in the high rust resistance flux-cored wire is U actual = U output - I*Rc.

[0027] Example two: As shown in the figure, unlike example one, the preparation method of a high rust resistance flux-cored wire in this embodiment includes the following steps: S1, raw material pretreatment S1.1, material determination, prepare one kilogram of raw materials, including ① high carbon chromium iron, ② tungsten carbide, ③ boron carbide, ④ rare earth metal oxide, ⑤ molybdenum iron powder, S1.2, proportioning materials, ① high carbon chromium iron 67.5-96.5 parts, ② tungsten carbide 0.3-1 part, ③ boron carbide 0.1-0.5 part, ④ rare earth metal oxide 1.1-1.5 part, ⑤ molybdenum iron powder 0.5-2.5 part, S1.4, steel belt treatment, cold rolling low carbon steel belt H08A is cut into 8-14 mm wide, and is rolled into U-shaped groove after cleaning.

[0028] S2, powder adding and forming S2.1, filling powder in the groove, filling rate control at 45-55%, S2.2, roller closing, ① steel strip method, ② stage drawing, ③ first drawing, U-shaped steel strip filled with powder is closed into a tube, ④ secondary drawing, nano-copper powder is embedded with titanium shell, and the diameter is reduced to the target diameter of 4mm, S2.3, disc round method production line outlet speed is 600m / min, φ1.2mm specification, real-time monitoring of roller parameters is required to cooperate with the computer.

[0029] S3, surface modification S3.1, copper plating treatment, ① nano-copper layer is plated on the surface of the base welding wire, ② secondary drawing makes copper powder embedded in the gap of titanium shell, S3.2, annealing toughness control, oxygen-free annealing is adopted.

[0030] S4, finished product inspection S4.1, chemical analysis, ① sampling, ② spectroscopic analysis method, S4.2, mechanical property detection.

[0031] In summary: compared with example two, before starting work, the staff prepares high-carbon chromium iron, tungsten carbide, boron carbide, rare earth metal oxide and molybdenum iron powder as raw materials, then grinds the raw materials with grinding equipment, then dries the ground powder with equipment at a temperature of 100-150℃ for 2-3 hours to ensure the dryness of the raw materials, then uniformly stirs with three-dimensional mixing equipment, then mixes and matches according to different proportions of anti-corrosion flux-cored wire, acid and alkali resistant flux-cored wire and high hardness high temperature resistant flux-cored wire, so as to facilitate the use of corresponding property welding wire according to different environments, and maximize the functionality of the welding wire.

[0032] It should be noted that, in the present document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0033] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and changes can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A method of making a high rust resistant flux cored welding wire characterized by: The preparation method comprises the following steps: S1, raw material pretreatment S1.1, material determination, prepare one kilogram of raw materials, including ① high carbon chromium iron, ② tungsten carbide, ③ boron carbide, ④ rare earth metal oxide, and ⑤ molybdenum iron powder, S1.2, pretreatment, ① mechanical grinding, ② drying for 2-3 hours, the temperature is 100-150℃, ③ three-dimensional mixing uniform, S1.3, material proportioning, ① high carbon chromium iron 67.5-96.5 parts, ② tungsten carbide 0.3-1 part, ③ boron carbide 0.1-0.5 part, ④ rare earth metal oxide 1.1-1.5 part, and ⑤ molybdenum iron powder 0.5-2.5 part, S1.4, steel belt treatment, cut the low-carbon steel belt H08A into 8-14 mm wide, and clean and roll into a U-shaped groove after cleaning; S2, powder adding and forming S2.1, groove powder filling, the filling rate is controlled to be 45-55%, S2.2, roll closing, ① steel belt method, ② stage drawing, ③ first drawing, the U-shaped steel belt is closed into a pipe after filling powder, ④ second drawing, the nano-copper powder is embedded into the titanium shell, and the diameter is reduced to the target diameter 4 mm, S2.3, disc round production line outlet speed is 600 m / min, φ1.2 mm specification, and computer real-time monitoring roll parameters are needed. S3, surface modification S3.1, copper plating treatment, ① nano-copper layer is plated on the surface of the base welding wire, ② the copper powder is embedded into the gap between the titanium shells through secondary drawing, S3.2, annealing toughness control, oxygen-free annealing is adopted, S3.3, surface modifier, ① nano-copper powder is electrostatically adsorbed on the surface of the titanium shell, and ② sodium fluoride is added. S4, finished product inspection S4.1, chemical analysis, ① sampling, ② spectroscopic analysis method, S4.2, mechanical property detection, ① deposited metal tensile test, ② impact toughness, the Charpy impact test machine is used to test the impact absorbed energy at-40℃, S4.3, corrosion resistance detection, ① salt spray test, continuously spraying 5% NaCl solution, the service life is required to be greater than or equal to 480 hours, ② weathering index, through the simulation of high-altitude and high-humidity environment, the humidity is required to be greater than 85%, and the weathering index is verified to be greater than 6.5, S4.4, surface defect detection, ① X-ray detection, ② welding verification, the diffusible hydrogen content of the deposited metal is required to be less than 5 ml / 100 g, the welding wire for pressure vessels needs to be detected compulsorily, ③ arc stability detection, the welding current / voltage adaptability is tested in actual operation, the formation state of the molten hole is observed, the molten hole size is required to be uniform, and the back weld is required to be free of oxidation.

2. The method of making a high rust resistant flux cored welding wire according to claim 1, characterized in that: The component content of the anti-corrosion flux-cored wire is high-carbon chromium iron: tungsten carbide: boron carbide: rare earth metal oxide: molybdenum iron powder = 96.5 parts: 1 part: 0.5 part; 1 part: 1 part.

3. The method of making a high rust resistant flux cored welding wire as claimed in claim 1, wherein: The component content of the acid and alkali resistant flux-cored wire is high-carbon chromium iron: tungsten carbide: boron carbide: rare earth metal oxide: molybdenum iron powder = 94.9 parts: 1 part: 0.5 part; 1.1 parts: 2.5 parts. The component content of the high-hardness and high-temperature resistant flux-cored wire is high-carbon chromium iron: tungsten carbide: boron carbide: rare earth metal oxide: molybdenum iron powder = 96 parts: 1 part: 0.5 part; 1.5 parts: 1 part.

4. The method of making a high rust resistant flux cored welding wire of claim 1, wherein: The roll rolling speed formula V = πDn / 60, D is the working diameter of the roll, the unit is m, which needs to be converted from mm, and n is the rolling speed, the unit is revolutions per minute. ​ 5. The method of making a high rust resistant flux cored welding wire of claim 1, wherein: ​ 6. The method of making a high rust resistant flux cored welding wire of claim 1, wherein: The raw material three-dimensional mixed traditional Chinese medicine core loading coefficient calculation formula λ=Wf / Vm*ρm*100%.

7. The method of making a high rust resistant flux cored welding wire of claim 6, wherein: In the raw material three-dimensional mixed traditional Chinese medicine core loading coefficient calculation formula, λ is a loading coefficient, the recommended range is 55-65%, Wf is the total mass of the single mixed medicine core, the unit is kg, which is converted into the actual mass according to the weight fraction of each component in the formula, Vm is the effective volume of the mixer, the unit is m³, and ρm is the bulk density of the medicine core powder, the unit is kg / m³.

8. The method of making a high rust resistant flux cored welding wire of claim 1, wherein: In the high-rust-resistance flux-cored wire, the arc voltage loss compensation calculation formula in the arc stability detection is U actual =U output -I*Rc.

9. The method of making a high rust resistant flux cored welding wire of claim 8, wherein: In the high-rust-resistance flux-cored wire, the arc voltage loss compensation calculation formula in the arc stability detection is U actual =U output -I*Rc.

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