Parameter design method of green low-cost high-quality descaling technology for cold stainless steel

Abstract

The present application relates to a kind of green low-cost high-quality descaling technology parameter design method suitable for cold stainless steel, it includes by selecting abrasive grain size d, abrasive flow Q, high-pressure water nozzle diameter D, jet pressure P, spray angle θ, spray distance h and the running speed v of strip steel, so that the kinetic energy component E of abrasive particle is perpendicular to the dynamic component E of steel strip surface 10 × 10 ‑3 J, the abrasive mass m consumed per unit area of strip steel descaling area is more than 9.5kg / m 3 , the abrasive mass concentration C in abrasive water jet is not more than 35%, to ensure that high-efficiency abrasive water jet descaling occurs on the surface of stainless steel, wherein the kinetic energy component E, the abrasive mass m consumed per unit area and the abrasive mass concentration C are calculated by the formula provided by the present application. The descaling parameters designed by the design method of the present application can achieve Sa3.0 level of surface cleanliness after descaling, obtain high-quality low-roughness descaling surface, and at the same time avoid energy and resource waste caused by excessive descaling.

Description

Technical Field

[0001] This invention belongs to the field of stainless steel surface treatment technology, and relates to a parameter design method for a green, low-cost, high-quality descaling technology for cold-state stainless steel. Background Technology

[0002] During steel production, the presence of iron oxide scale on the steel surface causes various product defects such as pits, pinholes, and iron oxide indentation. Therefore, it is necessary to completely remove the iron oxide scale; this process is called descaling. During hot rolling and heat treatment, stainless steel simultaneously forms a complex oxide layer structure (iron oxide, chromium oxide, chromium-nickel spinel) and a dechromium layer. This complex surface structure presents a challenge for stainless steel descaling.

[0003] The mainstream descaling methods for stainless steel are chemical pickling and abrasive waterjet descaling. Acid fumes generated during pickling severely impact the working environment, waste acid treatment is costly, and improper handling can easily pollute the environment. Traditional abrasive waterjet descaling using brittle abrasives, such as garnet and steel grit, has an abrasive lifespan of only 2-3 years, making the overall descaling cost higher than chemical pickling. Brittle abrasives cause micro-cutting wear on the stainless steel surface, with some abrasive embedding into the surface, resulting in a relatively high surface roughness after descaling.

[0004] The process for cold-processed stainless steel utilizes a combination of high-speed roller brush coarse descaling and abrasive waterjet fine descaling. This entire process is acid-free and environmentally friendly, employing martensitic stainless steel abrasives with an Irwin life of up to 3000, significantly reducing overall descaling costs. The martensitic stainless steel abrasive particles deform and wear down the stainless steel surface, achieving a high-quality surface roughness of 2-3 μm. Insufficient energy in the martensitic stainless steel particles leads to incomplete descaling in certain areas; excessive energy wastes energy and can cause severe surface hardening, affecting subsequent processing. Therefore, the design of process parameters in the abrasive waterjet fine descaling process directly impacts the final descaling effect.

[0005] Abrasive waterjet technology involves multiple parameters, including abrasive material, particle size, shape, ejection velocity, incident angle, and strip running speed. Traditionally, extensive experiments are needed to determine the threshold values ​​for these parameters. Bai Zhenhua et al. published a patent titled "An EPS Parameter Design Method Applicable to Green and Efficient Acid-Free Washing Technology." This patent is applied to the descaling of hot-rolled strip steel, providing an environmentally friendly technology for removing iron oxide scale without acid washing. The design parameters include abrasive material, particle size, shape, ejection velocity, incident angle, and strip running speed. The abrasive material is steel grit with a particle size of 150 mm and a small angular shape. The ejection velocity is 150-250 m / s, the incident angle is 60°-70°, and the strip running speed is 70-90 m / min. By accurately calculating these parameters, the pressure and impulse of the abrasive sprayed onto the strip surface are ensured to be sufficient to remove the oxide layer, while improving production efficiency and reducing costs. Compared with traditional EPS, this technology can significantly improve descaling speed and strip surface roughness, and reduce iron oxide scale residue. However, this method is applied to the removal of the oxide layer of hot-rolled strip steel, without considering the removal of the chromium-free layer of stainless steel. Furthermore, this method uses brittle abrasive steel shot to induce micro-cutting wear on the surface of hot-rolled strip steel. After descaling, an additional roller brush cleaning is required to ensure the surface quality, resulting in high overall descaling costs and a complex process. Liu Jiawei published a paper titled "Research on Abrasive Waterjet Descaling and Surface Integrity of 2205 Duplex Stainless Steel." This paper discusses the wear mechanism of stainless steel particles and garnet sand on stainless steel surfaces, presents the influence of the kinetic energy of a single stainless steel particle on "sheet" wear, and proposes the abrasive particle kinetic energy threshold for "sheet" wear. When using stainless steel shot, the surface of 2205 duplex stainless steel can experience both stainless steel shot deformation wear and stainless steel shot "sheet" wear. With the increase of stainless steel shot particle size and working pressure, the efficiency of stainless steel shot deformation wear significantly increases. When the kinetic energy of the stainless steel shot exceeds 3.49 × 10⁻⁶, the efficiency of stainless steel shot deformation wear increases significantly. -4At time J, "sheet" wear of stainless steel shot begins. When using garnet sand, micro-cutting wear occurs on the surface of 2205 duplex stainless steel. At an impact angle of 80°, "pockmarked" grooves are formed on the surface, and some garnet sand embeds into the material, causing surface contamination. However, this paper only discusses descaling using a single abrasive waterjet, which requires higher energy intake; moreover, the paper describes the threshold for "sheet" wear on the stainless steel surface from the perspective of stainless steel particle energy, which differs significantly from the actual industrial design parameters required. Dong Wenjie published a paper entitled "Simulation and Descaling Mechanism Study of Abrasive Waterjet Descaling Process". This paper studies the simulation and descaling mechanism of the abrasive waterjet descaling process. The flow field distribution of the abrasive waterjet was simulated using Fluent software, and the influence of descaling parameters on the temperature and impact pressure of the strip was analyzed, and the descaling parameters were optimized. Using the Python nonlinear curve fitting method, the impact pressure formula was derived, providing a theoretical basis for controlling the impact pressure and temperature. The fracture effect was simulated using LS-DYNA software, and the initiation and propagation of cracks in iron oxide scale were analyzed. Based on Workbench software, a fluid-thermal-solid coupling method was used to simulate the cooling effect, and the separation of the iron oxide scale interface from the substrate was studied. The scouring effect was simulated using coupled EDEM and Fluent software, and the effectiveness of abrasive water jet scouring of iron oxide scale fragments was analyzed. However, this scheme involves hot carbon steel descaling, uses garnet as an abrasive which may cause surface contamination, and employs numerical simulation for parameter design, making the design process complex. Summary of the Invention

[0006] In view of the above-mentioned problems of the prior art, the purpose of the present invention is to provide a parameter design method for descaling technology applicable to cold stainless steel. Each descaling parameter can be derived by simple theoretical formulas. After descaling using these parameters, a high-quality, low-roughness descaled surface is obtained, while avoiding the waste of energy and resources caused by excessive descaling.

[0007] To achieve the above objectives, this invention provides a parameter design method for a green, low-cost, high-quality descaling technology suitable for cold-state stainless steel, comprising the following steps: By selecting the abrasive particle size d, abrasive flow rate Q, high-pressure water nozzle diameter D, jet pressure P, jet angle θ, jet distance h, and strip running speed v, the kinetic energy component E of the abrasive particles perpendicular to the steel strip surface is made to exceed 10 × 10⁻⁶. -3 J. The abrasive mass consumption per unit area (m) in the descaling zone of the steel strip exceeds 9.5 kg / m. 3 The abrasive mass concentration C in the abrasive waterjet does not exceed 35%, thereby ensuring high-efficiency abrasive waterjet descaling on the stainless steel surface; The kinetic energy component E is calculated by the following formula I: In Equation I, V represents the volume of the abrasive particle, in mm. 3 ; ρ is the density of the abrasive particles (g / cm³). 3 ; N is the water jet power, in W; Q 水 The water jet flow rate is kg / min; Q represents the abrasive flow rate, kg / min; θ is the spray angle, in degrees; D is the diameter of the high-pressure water nozzle, in mm; P is the jet pressure, in MPa; The water jet power N mentioned in Equation I is calculated by Equation II: In Equation II, Q 水 The water jet flow rate is kg / min; P is the jet pressure, in MPa; D is the diameter of the high-pressure water nozzle, in mm; The mass of abrasive consumed per unit area, m, in the descaling zone of the steel strip is calculated by the following formula III: In Equation III, v is the running speed of the strip, in m / min; D 除 The diameter of the circular descaling area formed by a single nozzle, in mm; In Formula III, the diameter D of the circular descaling area formed by a single nozzle 除 Calculated by the following formula IV In Equation IV, h is the spray distance, in mm; The abrasive mass concentration C in the abrasive waterjet is calculated by the following formula: In formula V, Q 水 The water jet flow rate is kg / min; Q represents the abrasive flow rate, kg / min; P is the jet pressure, in MPa; D is the diameter of the high-pressure water nozzle, in mm.

[0008] In one possible implementation of the parameter design method of the present invention, the abrasive particles are martensitic stainless steel particles with a short cylindrical shape, and their particle volume V is calculated by the following formula VI: V = 0.25πd 3 (VI) In Formula VI, d represents the particle size of the martensitic stainless steel particles, in mm.

[0009] In one possible implementation of the parameter design method of the present invention, the abrasive particles are martensitic stainless steel particles in the shape of short rods with a Vickers hardness of 440 HV; the abrasive particle size d is 0.6 to 0.8 mm, the abrasive flow rate Q is 60 to 120 kg / min, the high-pressure water nozzle diameter D is 3 to 4 mm, the jet pressure P is 70 to 90 MPa, the jet angle θ is 75° to 85°, the jet distance h is 80 to 100 mm, and the running speed v of the strip is 4 to 7 m / min.

[0010] The parameter design method of this invention, derived through simple theoretical formulas, designs a green, low-cost, high-quality descaling technology for cold-state stainless steel using high-speed roller brush coarse descaling and abrasive water jet fine descaling. This design includes descaling parameters such as abrasive particle size d, abrasive flow rate Q, high-pressure water nozzle diameter D, jet pressure P, jet angle θ, jet distance h, and strip running speed v. The descaling parameters designed using this patented method achieve a surface cleanliness of Sa3.0 after descaling, resulting in a high-quality, low-roughness descaled surface while avoiding the energy and resource waste caused by over-descaling. Furthermore, this invention uses martensitic stainless steel particles as abrasive, combined with other descaling parameters, to induce deformation and wear on the stainless steel surface. Multiple particles repeatedly impact the same location on the surface, causing deformation and wear, effectively avoiding the adverse effects on the descaled surface caused by using other abrasives, such as contamination.

[0011] The above-described content of the present invention will become more apparent from the following description of several embodiments with reference to the accompanying drawings. Attached Figure Description

[0012] The following are accompanying drawings of the present invention. These drawings are provided only to illustrate the invention in a more intuitive form. They are exemplary and are not intended to limit the scope of the invention.

[0013] Figure 1 A schematic diagram showing the direction of movement of the nozzle and the strip during the descaling process of the present invention is shown. Detailed Implementation

[0014] To make the present invention easier to understand, specific embodiments are described below to further illustrate the invention. Unless otherwise specified, the experimental methods described in this invention are conventional methods; the materials described, unless otherwise specified, are commercially available. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. In case of any inconsistency, the meaning as described in this specification or derived from the content described herein shall prevail. Furthermore, the terminology used herein is for the purpose of describing embodiments of the invention only and is not intended to limit the invention.

[0015] In order to accurately describe the technical content of this invention and to accurately understand this invention, the following explanations or definitions of the words and terms used in this specification are given before describing the specific embodiments.

[0016] As used in this specification, the terms "one embodiment" or "implementation" mean that a particular feature, step, or characteristic described in conjunction with that embodiment is included in at least one embodiment of the invention. Therefore, the phrases "in one embodiment" or "in an embodiment" appearing throughout this specification do not necessarily refer to the same embodiment, but may refer to the same embodiment. Furthermore, in one or more embodiments, the particular features, steps, or characteristics can be combined in any suitable manner, as will be apparent to those skilled in the art from this invention.

[0017] The term “chemical pickling descaling of stainless steel” used in the specification and claims is the most widely used descaling method for hot-rolled stainless steel plates. It combines shot blasting and pickling, and the specific process is as follows: (1) First, shot blasting is used to mechanically break the surface oxide layer and remove part of the oxide layer; (2) Then, sulfuric acid or hydrochloric acid is used for pre-pickling; (3) Finally, a mixed solution of nitric acid and hydrofluoric acid is used for final pickling.

[0018] The term "abrasive waterjet" used in the specification and claims refers to a method of processing materials by using a high-speed water jet to propel abrasive particles at high speed. Based on the mixing method of the abrasive particles and water, it is classified into pre-mixing, post-mixing, and external mixing types. Post-mixing abrasive waterjet (hereinafter referred to as: abrasive waterjet) involves mixing high-speed water and abrasive particles in a mixing chamber, which are then sprayed through an abrasive nozzle to form an abrasive waterjet.

[0019] The term "Owen life" used in the specification and claims directly reflects the wear resistance of abrasive particles. A high Owen life signifies high wear resistance and high quality. Generally, abrasives with an Owen life exceeding 2600 are considered high-Owen life abrasives. The martensitic stainless steel particles involved in this invention have an Owen life of approximately 3000, classifying them as high-Owen life abrasives. The 100% substitution method test procedure for Irwin life is as follows: ① Place 100g of abrasive sample into the Irwin life tester; ② Cycle the tester until the sample consumption reaches about 20%, then stop the Irwin life tester; ③ Remove the sample, sieve it with a mesh screen to remove the undersize material, weigh the material remaining on the screen, and record the loss and cumulative loss; ④ Add the original abrasive sample until the material remaining on the screen reaches 100g again, and cycle the tester again; ⑤ Repeat steps ① to ④ until the cumulative loss is ≥100g; ⑥ The formula for calculating the 100% substitution method Irwin life is: Irwin life = total number of cycles (number of tests per cycle / final loss) × (cumulative loss % - 100).

[0020] The term "cold-state stainless steel green low-cost high-quality descaling technology" used in the specification and claims refers to a descaling process of coarse descaling with high-speed roller brushes and fine descaling with abrasive water jets. The high-speed roller brushes remove most of the iron oxide scales on the stainless steel surface (iron oxide scale removal rate ≥90%), while the abrasive water jets remove residual iron oxide scales and the dechromium layer (chromium content is significantly lower than that of the substrate, resulting in poor corrosion resistance, and must be removed) from the stainless steel surface.

[0021] This invention provides a parameter design method for a green, low-cost, high-quality descaling technology suitable for cold-state stainless steel, comprising the following steps: By selecting the abrasive particle size d, abrasive flow rate Q, high-pressure water nozzle diameter D, jet pressure P, jet angle θ, jet distance h, and strip running speed v, the kinetic energy component E of the abrasive particles perpendicular to the steel strip surface is made to exceed 10 × 10⁻⁶. -3 J. The abrasive mass consumption per unit area (m) in the descaling zone of the steel strip exceeds 9.5 kg / m. 3 The abrasive mass concentration C in the abrasive waterjet does not exceed 35%, thereby ensuring high-efficiency abrasive waterjet descaling on the stainless steel surface; The kinetic energy component E is calculated by the following formula I: In Equation I, V represents the volume of the abrasive particle, in mm. 3 ; ρ is the density of the abrasive particles (g / cm³). 3 ; N is the water jet power, in W; Q 水 The water jet flow rate is kg / min; Q represents the abrasive flow rate, kg / min; θ is the spray angle, in degrees; D is the diameter of the high-pressure water nozzle, in mm; P is the jet pressure, in MPa; The water jet power N mentioned in Equation I is calculated by Equation II: In Equation II, Q 水 The water jet flow rate is kg / min; P is the jet pressure, in MPa; D is the diameter of the high-pressure water nozzle, in mm; The mass of abrasive consumed per unit area, m, in the descaling zone of the steel strip is calculated by the following formula III: In Equation III, v is the running speed of the strip, in m / min; D 除 The diameter of the circular descaling area formed by a single nozzle, in mm; In Formula III, the diameter D of the circular descaling area formed by a single nozzle 除 Calculated by the following formula IV In Equation IV, h is the spray distance, in mm; The abrasive mass concentration C in the abrasive waterjet is calculated by the following formula: In formula V, Q 水 The water jet flow rate is kg / min; Q represents the abrasive flow rate, kg / min; P is the jet pressure, in MPa; D is the diameter of the high-pressure water nozzle, in mm.

[0022] To enable those skilled in the art to more easily understand and implement the technical solutions of the present invention, exemplary embodiments of the present invention are provided below.

[0023] Example 1

[0024] The abrasive is made of martensitic stainless steel particles with a particle size of 0.6 mm. The abrasive flow rate is 65 kg / min. The high-pressure water nozzle has a diameter of 3.2 mm, a jet pressure of 75 MPa, a jet angle of 80°, a jet distance of 85 mm, and a strip running speed of 4 m / min.

[0025] abrasive volume is V = 0.25πd 3 =0.17mm 3 Water jet power is N = 35.1D 2 P 1.5 =233452W When the abrasive particles reach the steel belt, their kinetic energy perpendicular to the steel belt direction is: The spray distance is 85mm, and the diameter of the circular descaling area formed by a single nozzle is 25mm. Mass of abrasive consumed per unit area in the descaling zone of steel strip Abrasive mass concentration in abrasive waterjet

[0026] In summary, the kinetic energy of the abrasive particles perpendicular to the steel belt when they reach the steel belt is 10.89 × 10⁻⁶. -3 J is 10 × 10⁻⁶ above the critical value. -3 J; Abrasive flow rate per unit area of ​​strip steel: 10.83 kg / m 3 It is higher than the critical value of 9.5 kg / m 3 The abrasive concentration was 30.92%, lower than the critical value of 35%, and the surface cleanliness after descaling reached Sa3 level, with the oxide layer and dechromium layer completely removed. Therefore, the process parameters designed in this group meet the requirements for cold-state stainless steel.

[0027] Example 2

[0028] The abrasive is made of martensitic stainless steel particles with a particle size of 0.8 mm. The abrasive flow rate is 120 kg / min. The high-pressure water nozzle has a diameter of 4 mm, a jet pressure of 90 MPa, a jet angle of 75°, a jet distance of 100 mm, and a strip running speed of 7 m / min.

[0029] abrasive volume is V = 0.25πd 3 =0.4mm 3 Water jet power is N = 35.1D 2 P 1.5 =606870W The kinetic energy of the abrasive particles when they reach the steel belt is The spraying distance is 100mm, and the diameter of the circular descaling area formed by a single nozzle is 30mm. Mass of abrasive consumed per unit area in the descaling zone of steel strip Abrasive mass concentration in abrasive waterjet

[0030] In summary, the kinetic energy of the abrasive particles perpendicular to the steel belt when they reach the steel belt is 31.59 × 10⁻⁶. -3 J is 10 × 10⁻⁶ above the critical value. -3 J; Abrasive flow rate per unit area of ​​strip steel: 9.52 kg / m 3 It is higher than the critical value of 9.5 kg / m 3 The abrasive concentration was 29.75%, lower than the critical value of 35%. After descaling, the surface cleanliness reached Sa3 level, and the oxide layer and dechromium layer were completely removed. Therefore, the process parameters designed in this group meet the requirements for cold-state stainless steel.

[0031] Comparative Example 1

[0032] The abrasive is made of martensitic stainless steel particles with a particle size of 0.5 mm. The abrasive flow rate is 60 kg / min. The high-pressure water nozzle has a diameter of 3.4 mm, a jet pressure of 80 MPa, a jet angle of 85°, a jet distance of 80 mm, and a strip running speed of 4 m / min.

[0033] abrasive volume is V = 0.25πd 3 =0.1mm 3 Water jet power is N = 35.1D 2 P 1.5 =290335W The kinetic energy of the abrasive particles when they reach the steel belt is The spray distance is 80mm, and the diameter of the circular descaling area formed by a single nozzle is 25mm. abrasive flow rate per unit area of ​​strip steel Abrasive mass concentration in abrasive waterjet

[0034] In summary, the kinetic energy of the abrasive particles perpendicular to the steel belt when they reach the steel belt is 7.19 × 10⁻⁶. -3 J is below the critical value of 10 × 10 -3 J; Abrasive flow rate per unit area of ​​strip steel: 10 kg / m 3 It is higher than the critical value of 9.5 kg / m 3 The abrasive concentration was 19.96%, lower than the critical value of 35%, leaving a residual chromium-depleted layer on the surface after descaling. Therefore, the process parameters designed in this group do not meet the requirements for cold-state stainless steel.

[0035] Comparative Example 2

[0036] The abrasive is made of martensitic stainless steel particles with a particle size of 0.6 mm. The abrasive flow rate is 56 kg / min. The high-pressure water nozzle has a diameter of 3.2 mm, a jet pressure of 75 MPa, a jet angle of 80°, a jet distance of 88 mm, and a strip running speed of 4 m / min.

[0037] abrasive volume is V = 0.25πd 3 =0.17mm 3 Water jet power is N = 35.1D 2 P 1.5 =233452W The kinetic energy of the abrasive particles when they reach the steel belt is The spray distance is 88mm, and the diameter of the circular descaling area formed by a single nozzle is 26mm. abrasive flow rate per unit area of ​​strip steel Abrasive mass concentration in abrasive waterjet

[0038] In summary, the kinetic energy of the abrasive particles perpendicular to the steel belt when they reach the steel belt is 11.29 × 10⁻⁶. -3 J is 10 × 10⁻⁶ above the critical value. -3 J; Abrasive flow rate per unit area of ​​strip steel: 8.97 kg / m 3 It is below the critical value of 9.5 kg / m 3 The abrasive concentration is 30.07%, which is below the critical value of 35%, leaving a residual chromium-depleted layer on the surface after descaling. Therefore, the process parameters designed in this group do not meet the requirements for cold-state stainless steel.

[0039] Comparative Example 3

[0040] The abrasive is made of martensitic stainless steel particles with a particle size of 0.7 mm. The abrasive flow rate is 90 kg / min. The high-pressure water nozzle diameter is 3.5 mm, the jet pressure is 80 MPa, the jet angle is 80°, the jet distance is 90 mm, and the running speed of the strip is 6 m / min.

[0041] abrasive volume is V = 0.25πd 3 =0.27mm 3 Water jet power is N = 35.1D2 P 1.5 =307665W The kinetic energy of the abrasive particles when they reach the steel belt is The spray distance is 90mm, and the diameter of the circular descaling area formed by a single nozzle is 26mm. abrasive flow rate per unit area of ​​strip steel Abrasive mass concentration in abrasive waterjet

[0042] In summary, the kinetic energy of the abrasive particles perpendicular to the steel belt when they reach the steel belt is 17.89 × 10⁻⁶. -3 J is 10 × 10⁻⁶ above the critical value. -3 J; Abrasive flow rate per unit area of ​​strip steel: 9.62 kg / m 3 It is higher than the critical value of 9.5 kg / m 3 The abrasive concentration was 39.11%, lower than the critical value of 35%, leaving a residual chromium-depleted layer on the surface after descaling. Therefore, the process parameters designed in this group do not meet the requirements for cold-state stainless steel.

[0043] The above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, all of which fall within the scope of protection of the present invention.

Claims

1. A parameter design method for a green, low-cost, high-quality descaling technology suitable for cold-state stainless steel, characterized in that, By selecting the abrasive particle size d, abrasive flow rate Q, high-pressure water nozzle diameter D, jet pressure P, jet angle θ, jet distance h, and strip running speed v, the kinetic energy component E of the abrasive particles perpendicular to the steel strip surface is made to exceed 10 × 10⁻⁶. -3 J. The abrasive mass consumption per unit area (m) in the descaling zone of the steel strip exceeds 9.5 kg / m. 3 The abrasive mass concentration C in the abrasive waterjet does not exceed 35%, thereby ensuring high-efficiency abrasive waterjet descaling on the stainless steel surface; The kinetic energy component E is calculated by the following formula I: In Equation I, V represents the volume of the abrasive particle, in mm. 3 ; ρ is the density of the abrasive particles (g / cm³). 3 ; N is the water jet power, in W; Q 水 The water jet flow rate is kg / min; Q represents the abrasive flow rate, kg / min; θ is the injection angle, in degrees; D is the diameter of the high-pressure water nozzle, in mm; P is the jet pressure, in MPa; The water jet power N mentioned in Equation I is calculated by Equation II: In Equation II, Q 水 The water jet flow rate is kg / min; P is the jet pressure, in MPa; D is the diameter of the high-pressure water nozzle, in mm; The mass of abrasive consumed per unit area, m, in the descaling zone of the steel strip is calculated by the following formula III: In Equation III, v is the running speed of the strip, in m / min; D 除 The diameter of the circular descaling area formed by a single nozzle, in mm; In Formula III, the diameter D of the circular descaling area formed by a single nozzle 除 Calculated by the following formula IV: In Equation IV, h is the spray distance, in mm; The abrasive mass concentration C in the abrasive waterjet is calculated by the following formula: In formula V, Q 水 The water jet flow rate is kg / min; Q represents the abrasive flow rate, kg / min; P is the jet pressure, in MPa; D is the diameter of the high-pressure water nozzle, in mm.

2. The parameter design method according to claim 1, characterized in that, The abrasive particles are martensitic stainless steel particles, and their shape is short cylindrical. The particle volume V is calculated by the following formula VI: V=0.25πd 3 (VI) In Formula VI, d represents the particle size of the martensitic stainless steel particles, in mm.

3. The parameter design method according to claim 1, characterized in that, The abrasive particles are martensitic stainless steel particles in the shape of short rods, with a Vickers hardness of 440 HV; the abrasive particle size d is 0.6 to 0.8 mm, the abrasive flow rate Q is 60 to 120 kg / min, the high-pressure water nozzle diameter D is 3 to 4 mm, the jet pressure P is 70 to 90 MPa, the jet angle θ is 75° to 85°, the jet distance h is 80 to 100 mm, and the running speed v of the strip is 4 to 7 m / min.

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