A method for preparing a high wear-resistant alloy steel liner

Abstract

The invention relates to the technical field of high-wear-resistant alloys, and specifically discloses a method for preparing a high-wear-resistant alloy steel liner. The preparation method comprises the following steps: S1: placing an alloy steel liner in a plating solution, electroplating, and obtaining an alloy steel liner A having a coating A on the surface; the plating solution comprises the following raw materials: 45-60 g / L of sodium citrate dihydrate, 30-35 g / L of boric acid, 5-8 g / L of ammonium chloride, 80-100 g / L of nickel sulfamate, 180-200 g / L of iron sulfamate, 0.5-0.8 g / L of sodium lauryl sulfate, 2-5 g / L of modified boron nitride, and the remainder being deionized water; S2: taking the alloy steel liner A, plating a transition metal boride layer on the surface by arc ion plating, and obtaining the alloy steel liner B as the coating B; S3: taking the alloy steel liner B, annealing, and then boronizing to obtain the high-wear-resistant alloy steel liner.

Description

Technical Field

[0001] The invention relates to the technical field of high-wear-resistant alloys, and particularly discloses a method for preparing a high-wear-resistant alloy steel liner. Background Art

[0002] Alloy steel liners require high strength, corrosion resistance, and wear resistance. Introducing boron during alloy steel smelting improves strength and wear resistance. However, due to processing difficulties and the impact of other elements during processing, if the boron content is too low, the performance improvement will be minimal. Excessive boron content can increase the brittleness of the steel, leading to cracks and reduced mechanical properties and corrosion resistance. Therefore, existing technologies often use a boriding process to introduce boron.

[0003] Boriding is a method in the field of metal material surface treatment that can improve the surface hardness, wear resistance, corrosion resistance and other properties of the metal. The quality of the boronized layer is affected by the surface state of the metal. If the boronizing process is improper, it will also cause the metal surface to become more brittle, which in turn leads to a decrease in performance. In summary, it is of great significance to study a method for preparing alloy steel liners with good wear resistance and corrosion resistance. Summary of the Invention

[0004] The object of the present invention is to provide a method for preparing a high wear-resistant alloy steel liner to solve the problems raised in the prior art.

[0005] To achieve the above object, the present invention provides the following technical solution: a method for preparing a high-wear-resistant alloy steel liner, comprising the following steps: S1: placing the alloy steel liner in an iron-nickel-boron plating solution and electroplating to obtain an alloy steel liner A having a coating A on the surface;

[0006] S2: Take alloy steel liner A and plate a transition metal boride layer on the surface by arc ion plating, which is used as coating B to obtain alloy steel liner B;

[0007] S3: Take alloy steel liner B, anneal it and then boronize it to obtain a high wear-resistant alloy steel liner.

[0008] More optimally, the iron-nickel-boron plating solution includes the following raw materials: 45-60 g / L of sodium citrate dihydrate, 30-35 g / L of boric acid, 5-8 g / L of ammonium chloride, 80-100 g / L of nickel sulfamate, 180-200 g / L of iron sulfamate, 0.5-0.8 g / L of sodium lauryl sulfate, 2-5 g / L of modified boron nitride, and the rest is deionized water.

[0009] More optimally, the preparation of the modified boron nitride includes the following steps: taking hydroxylated boron nitride, adding N,N-dimethylformamide, dispersing evenly, adding epoxy polyethylene glycol, triaminobenzene, and 2,4-dimercaptophenol, heating to 135-140°C and stirring for 4-6 hours, and removing the solvent to obtain modified boron nitride.

[0010] More optimally, the modified boron nitride includes the following raw materials, calculated by mass: 10 to 12 parts of hydroxylated boron nitride, 60 to 80 parts of N,N-dimethylformamide, 1 to 2 parts of epoxy polyethylene glycol, 0.1 to 0.2 parts of triaminobenzene, and 0.5 to 0.8 parts of 2,4-dimercaptophenol.

[0011] More optimally, the preparation of the hydroxylated boron nitride refers to the existing technology: take 2 to 3 parts of hexagonal boron nitride powder, add 80 to 100 parts of 10% nitric acid solution, heat to 80 to 90 ° C and stir for 5 to 8 hours, centrifuge, wash with water, and dry, add 50 to 60 parts of deionized water, disperse evenly, add 0.02 to 0.03 parts of formic acid and 1 to 1.5 parts of concentrated sulfuric acid, and use 60Co gamma ray irradiation for 24 hours. The absorbed dose rate is 80 to 120 Gy / min (calibrated by ferrous sulfate dosimeter), and the total absorbed dose is greater than or equal to 100 kGy. After the irradiation is completed, take it out, let it stand and settle, remove the upper liquid, wash with water, and dry to obtain hydroxylated boron nitride.

[0012] More optimally, the preparation of the hydroxylated boron nitride includes the following steps: taking 2 parts of hexagonal boron nitride powder, adding 80 parts of 10wt% nitric acid solution, heating to 80°C and stirring for 5 hours, centrifuging, washing with water, and drying for 24 hours, adding 50 parts of deionized water, dispersing evenly, adding 0.025 parts of formic acid and 1.5 parts of concentrated sulfuric acid, and irradiating with 60Coγ rays for 24 hours, with an absorbed dose rate of 113.4Gy / min (calibrated by a ferrous sulfate dosimeter) and a total absorbed dose of 163.3kGy. After the irradiation is completed, the powder is taken out, allowed to stand and settle, the upper liquid is removed, washed with water, and dried to obtain hydroxylated boron nitride.

[0013] More optimally, the electroplating process is: temperature 55-65°C, constant current DC current density 3-5A / dm 3 Electroplating for 20 to 30 minutes.

[0014] More optimally, the arc ion plating process is as follows: take alloy steel liner A, use transition metal boride Fe2B as a target, and deposit a 200-300nm coating B under the conditions of 0.1-0.2Pa and 600-800V to obtain alloy steel liner B.

[0015] More optimally, the preparation of the transition metal boride Fe2B refers to the existing technology: take 10 to 12 parts of nano-ferric oxide, put it into a fixed bed reactor, program the temperature to 280 to 300 ° C in a pure hydrogen atmosphere, keep the temperature constant for 10 to 12 hours, and then naturally cool to room temperature in an argon atmosphere; wherein, the heating rate is 10 to 15 ° C / min, the pressure is 2 to 2.2 bar, and the flow rate of H2 is 180 to 220 mL / min; the reaction atmosphere is switched to hydrogen and boron trichloride, the temperature is programmed to 480 to 500 ° C, keep the temperature constant for 6 to 8 hours, and then naturally cool to 25 to 28 ° C in a hydrogen atmosphere; wherein the heating rate is 10 to 15 ° C / min, the pressure is 2 to 2.2 bar, the hydrogen flow rate is 900 to 1000 mL / min, and the boron trichloride flow rate is 30 to 40 mL / min. After the treatment, the transition metal boride Fe2B is obtained.

[0016] More optimally, the preparation process of the transition metal boride Fe2B is as follows: take 10 parts of nano-ferric oxide, put them into a fixed bed reactor, program the temperature to 300°C in a pure hydrogen atmosphere, keep the temperature constant for 12 hours, and then naturally cool to room temperature in an argon atmosphere; wherein, the heating rate is 10°C / min, the pressure is 2 bar, and the H2 flow rate is 200 mL / min; the reaction atmosphere is switched to hydrogen and boron trichloride, program the temperature to 480°C, keep the temperature constant for 6 hours, and then naturally cool to 25°C in a hydrogen atmosphere; wherein the heating rate is 10°C / min, the pressure is 2 bar, the hydrogen flow rate is 900 mL / min, and the boron trichloride flow rate is 30 mL / min. After the treatment, the transition metal boride Fe2B is obtained.

[0017] More optimally, the process of boronizing after annealing is as follows: take the alloy steel liner B, put it into a stainless steel container filled with powdered boronizing agent after annealing, seal and dry it; heat the stainless steel container to 900-950°C for 3-4 hours of boronizing, and the boronizing depth is 0.1-0.15mm to obtain a highly wear-resistant alloy steel liner.

[0018] More optimally, the powder boronizing agent is 99% iron-boron-iron alloy powder from Shanghai Gelin Technology Co., Ltd.

[0019] More optimally, the specific process of the annealing is: heating to 800-850°C and then keeping the temperature for 200-220 minutes, then cooling to 550-600°C with the furnace and then air cooling.

[0020] More optimally, the alloy steel lining includes the following chemical components, in percentage by mass: carbon 0.7-1.0%, silicon 0.3-0.8%, manganese 0.5-1.0%, chromium 4.0-7.0%, vanadium 0.01-0.02%, molybdenum 0.1-0.5%, copper 0.05-0.1%, nickel 0.08-0.1%, nitrogen 0.01-0.03%, aluminum 0.02-0.05%, cobalt 0.01-0.03%, phosphorus ≤0.035%, sulfur ≤0.03%, and the balance is iron and unavoidable impurities.

[0021] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: (1) first plating the coating A and the coating B and then boronizing; the coating A is an iron-nickel-boron layer, and the presence of iron-nickel makes the layer have good bonding with the alloy steel, and the boron nitride contained in the plating solution provides good wear resistance and corrosion resistance; this layer, as a base layer, requires good flatness and uniformity, so the added boron nitride surface is grafted with epoxy polyethylene glycol, triaminobenzene, and 2,4-dimercaptophenol; polyethylene glycol is used as a wetting agent to reduce surface tension and improve the dispersibility and wettability of the electroplating solution on the substrate surface; triaminobenzene, on the one hand, acts as a branching agent to increase the branch chain and improve the bonding force with the metal surface, and on the other hand, the molecular planarity of the benzene ring structure thereof contributes to the orderly adsorption of the coating, which can improve the quality of the coating; 2,4-dimercaptophenol is used as a leveling agent to further improve the flatness of the coating, and a high-quality base layer is conducive to further plating and boronizing in subsequent steps;

[0022] Coating B is a transition metal boride layer deposited by arc ion plating, which has the advantages of good adhesion, good wear resistance, and good corrosion resistance. In addition, the pre-plating of transition metal boride facilitates the subsequent boronization step. The boron element in coating B also serves as a diffusion starting point, accelerating the boronization speed. At the same time, the boron element in coating B is evenly distributed, which facilitates uniform boronization, improves surface defects, and enhances the bonding strength of the boronized layer.

[0023] After applying two layers of coating, annealing is carried out to refine the grains and reduce internal stress, effectively reducing deformation or cracking that may be caused by subsequent boronizing. In summary, this process forms a gradient multi-layer structure on the surface of the alloy steel. On the one hand, the multi-layer structure can reduce crack propagation, and on the other hand, it promotes boronizing, accelerates the diffusion of boron, reduces surface defects, improves uniformity, and obtains products with high wear resistance and high corrosion resistance. DETAILED DESCRIPTION

[0024] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0025] The following parts are by mass unless otherwise specified;

[0026] Example 1: S1: Take 12 parts of hydroxylated boron nitride, add 60 parts of N,N-dimethylformamide, disperse evenly, add 2 parts of epoxy polyethylene glycol, 0.15 parts of triaminobenzene, and 0.6 parts of 2,4-dimercaptophenol, heat to 140°C and stir for 6 hours, remove the solvent, and obtain modified boron nitride;

[0027] S2: Prepare the plating solution: 60g / L sodium citrate dihydrate, 30g / L boric acid, 6g / L ammonium chloride, 80g / L nickel sulfamate, 200g / L iron sulfamate, 0.5g / L sodium lauryl sulfate, 4g / L modified boron nitride, and the rest is deionized water;

[0028] S3: Place the alloy steel liner in the iron-nickel-boron plating solution, set the temperature to 60 ° C, and operate at a constant current DC current density of 4A / dm 3 Under the condition of 400 nm, electroplating was performed for 25 minutes to obtain an alloy steel lining plate A having a coating A on the surface;

[0029] The alloy steel liner comprises the following chemical composition, in percentage by mass: 0.90% C, 0.55% Si, 0.60% Mn, 0.03% P, 0.02% S, 5.5% Cr, 0.097% Ni, 0.084% Cu, 0.26% Mo, 0.015% V, 0.04% Al, 0.02% Co and 0.02% N, with the remainder being iron and unavoidable impurities;

[0030] S4: Take alloy steel liner A and plate coating B using arc ion plating composite coating equipment: using transition metal boride as a target, deposit 250nm of coating B under the conditions of 0.1Pa, 600V; obtain alloy steel liner B;

[0031] S5: Take alloy steel liner B and anneal it: heat it to 850℃ and keep it warm for 200 minutes, then cool it to 600℃ with the furnace and air-cool it. Put it into a stainless steel container filled with powdered boronizing agent, seal it and dry it. Place the stainless steel container in a box-type resistance furnace, heat it to 900℃ with the furnace and perform boronizing for 4 hours. The boronizing depth is 0.1mm. A high wear-resistant alloy steel liner is obtained.

[0032] Example 2: S1: Take 10 parts of hydroxylated boron nitride, add 60 parts of N,N-dimethylformamide, disperse evenly, add 1 part of epoxy polyethylene glycol, 0.1 part of triaminobenzene, and 0.5 part of 2,4-dimercaptophenol, heat to 135°C and stir for 6 hours, remove the solvent, and obtain modified boron nitride;

[0033] S2: Prepare the plating solution: 60g / L sodium citrate dihydrate, 35g / L boric acid, 8g / L ammonium chloride, 100g / L nickel sulfamate, 180g / L iron sulfamate, 0.5g / L sodium lauryl sulfate, 3g / L modified boron nitride, and the rest is deionized water;

[0034] S3: Place the alloy steel liner in the iron-nickel-boron plating solution, set the temperature to 55°C, and operate at a constant current of 5A / dm 3 Electroplating was performed for 30 minutes to obtain an alloy steel lining plate A having a coating A on the surface;

[0035] The alloy steel liner comprises the following chemical composition, in percentage by mass: 0.90% C, 0.55% Si, 0.60% Mn, 0.03% P, 0.02% S, 5.5% Cr, 0.097% Ni, 0.084% Cu, 0.26% Mo, 0.015% V, 0.04% Al, 0.02% Co and 0.02% N, with the remainder being iron and unavoidable impurities;

[0036] S4: Take alloy steel liner A and plate coating B by arc ion plating composite coating equipment: using transition metal boride as target, deposit 300nm coating B under the conditions of 0.1Pa, 600V; obtain alloy steel liner B;

[0037] S5: Take alloy steel liner B and anneal it: heat it to 850℃ and keep it warm for 200 minutes, then cool it to 600℃ with the furnace and air-cool it. Put it into a stainless steel container filled with powdered boronizing agent, seal it and dry it; place the stainless steel container in a box-type resistance furnace, heat it to 900℃ with the furnace and perform boronizing for 3 hours. The boronizing depth is 0.1mm. A high-wear-resistant alloy steel liner is obtained.

[0038] Example 3: S1: Take 12 parts of hydroxylated boron nitride, add 80 parts of N,N-dimethylformamide, disperse evenly, add 2 parts of epoxy polyethylene glycol, 0.2 parts of triaminobenzene, and 0.8 parts of 2,4-dimercaptophenol, heat to 140°C and stir for 4 hours, remove the solvent, and obtain modified boron nitride;

[0039] S2: Prepare the plating solution: 45g / L sodium citrate dihydrate, 35g / L boric acid, 8g / L ammonium chloride, 100g / L nickel sulfamate, 180g / L iron sulfamate, 0.8g / L sodium lauryl sulfate, 5g / L modified boron nitride, and the rest is deionized water;

[0040] S3: Place the alloy steel liner in the iron-nickel-boron plating solution, set the temperature to 65 ° C, and operate at a constant current DC current density of 5A / dm 3 Electroplating was performed for 20 minutes to obtain an alloy steel lining plate A having a coating A on the surface;

[0041] The alloy steel liner comprises the following chemical composition, in percentage by mass: 0.90% C, 0.55% Si, 0.60% Mn, 0.03% P, 0.02% S, 5.5% Cr, 0.097% Ni, 0.084% Cu, 0.26% Mo, 0.015% V, 0.04% Al, 0.02% Co and 0.02% N, with the remainder being iron and unavoidable impurities;

[0042] S4: Take alloy steel liner A and plate coating B by arc ion plating composite coating equipment: using transition metal boride as target, deposit 200nm coating B under 0.1Pa, 600V conditions; obtain alloy steel liner B;

[0043] S5: Take alloy steel liner B and anneal it: heat it to 850℃ and keep it warm for 200 minutes, then cool it to 600℃ with the furnace and air-cool it. Put it into a stainless steel container filled with powdered boronizing agent, seal it and dry it. Place the stainless steel container in a box-type resistance furnace, heat it to 900℃ with the furnace and perform boronizing for 4 hours. The boronizing depth is 0.1mm. A high wear-resistant alloy steel liner is obtained.

[0044] Comparative Example 1 (changing the plating solution composition, the remaining method steps are consistent with Example 1): S1: Take 2 parts of epoxy polyethylene glycol, 0.15 parts of triaminobenzene, and 0.6 parts of 2,4-dimercaptophenol, and stir them evenly to obtain a modifier;

[0045] S2: Prepare the plating solution: 60g / L sodium citrate dihydrate, 30g / L boric acid, 6g / L ammonium chloride, 80g / L nickel sulfamate, 200g / L iron sulfamate, 0.5g / L sodium lauryl sulfate, 4g / L boron nitride, 4g / L additives, and the rest is deionized water;

[0046] S3: Place the alloy steel liner in the iron-nickel-boron plating solution, set the temperature to 60 ° C, and operate at a constant current DC current density of 4A / dm 3 Under the condition of 400 nm, electroplating was performed for 25 minutes to obtain an alloy steel lining plate A having a coating A on the surface;

[0047] The alloy steel liner comprises the following chemical composition, in percentage by mass: 0.90% C, 0.55% Si, 0.60% Mn, 0.03% P, 0.02% S, 5.5% Cr, 0.097% Ni, 0.084% Cu, 0.26% Mo, 0.015% V, 0.04% Al, 0.02% Co and 0.02% N, with the remainder being iron and unavoidable impurities;

[0048] S4: Take alloy steel liner A and plate coating B using arc ion plating composite coating equipment: using transition metal boride as a target, deposit 250nm of coating B under the conditions of 0.1Pa, 600V; obtain alloy steel liner B;

[0049] S5: Take alloy steel liner B and anneal it: heat it to 850℃ and keep it warm for 200 minutes, then cool it to 600℃ with the furnace and air-cool it. Put it into a stainless steel container filled with powdered boronizing agent, seal it and dry it. Place the stainless steel container in a box-type resistance furnace, heat it to 900℃ with the furnace and perform boronizing for 4 hours. The boronizing depth is 0.1mm. A high wear-resistant alloy steel liner is obtained.

[0050] Comparative Example 2 (no transition metal boride coating, other method steps are consistent with Example 1): S1: Take 12 parts of hydroxylated boron nitride, add 60 parts of N,N-dimethylformamide, disperse evenly, add 2 parts of epoxy polyethylene glycol, 0.15 parts of triaminobenzene, and 0.6 parts of 2,4-dimercaptophenol, heat to 140°C and stir for 6 hours, remove the solvent to obtain modified boron nitride;

[0051] S2: Prepare the plating solution: 60g / L sodium citrate dihydrate, 30g / L boric acid, 6g / L ammonium chloride, 80g / L nickel sulfamate, 200g / L iron sulfamate, 0.5g / L sodium lauryl sulfate, 4g / L modified boron nitride, and the rest is deionized water;

[0052] S3: Place the alloy steel liner in the iron-nickel-boron plating solution, set the temperature to 60 ° C, and operate at a constant current DC current density of 4A / dm 3 Under the condition of 400 nm, electroplating was performed for 25 minutes to obtain an alloy steel lining plate A having a coating A on the surface;

[0053] The alloy steel liner comprises the following chemical composition, in percentage by mass: 0.90% C, 0.55% Si, 0.60% Mn, 0.03% P, 0.02% S, 5.5% Cr, 0.097% Ni, 0.084% Cu, 0.26% Mo, 0.015% V, 0.04% Al, 0.02% Co and 0.02% N, with the remainder being iron and unavoidable impurities;

[0054] S4: Take alloy steel liner A and anneal it: heat it to 850℃ and keep it warm for 200 minutes, then cool it to 600℃ with the furnace and air-cool it. Put it into a stainless steel container filled with powdered boronizing agent, seal it and dry it; place the stainless steel container in a box-type resistance furnace, heat it to 900℃ with the furnace and perform boronizing for 4 hours. The boronizing depth is 0.1mm. A high-wear-resistant alloy steel liner is obtained.

[0055] Comparative Example 3 (coating A is not applied, and the remaining steps are the same as those in Example 1): S1: An alloy steel liner is plated with coating B using an arc ion plating composite coating device: a transition metal boride is used as a target, and a 250 nm coating B is deposited at 0.1 Pa and 600 V to obtain an alloy steel liner B;

[0056] The alloy steel liner comprises the following chemical composition, in percentage by mass: 0.90% C, 0.55% Si, 0.60% Mn, 0.03% P, 0.02% S, 5.5% Cr, 0.097% Ni, 0.084% Cu, 0.26% Mo, 0.015% V, 0.04% Al, 0.02% Co and 0.02% N, with the remainder being iron and unavoidable impurities;

[0057] S2: Take alloy steel liner B and anneal it: heat it to 850℃ and keep it warm for 200 minutes, then cool it to 600℃ in the furnace and air-cool it. Place it in a stainless steel container filled with powdered boronizing agent, seal it and dry it. Place the stainless steel container in a box-type resistance furnace and heat it to 900℃ in the furnace for 4 hours to boronize it. The boronizing depth is 0.1mm. A high-wear-resistant alloy steel liner is obtained.

[0058] Comparative Example 4 (changing the electroplating process and the thickness of the coating B, and the remaining steps are consistent with Example 1): S1: Take 12 parts of hydroxylated boron nitride, add 60 parts of N,N-dimethylformamide, disperse evenly, add 2 parts of epoxy polyethylene glycol, 0.15 parts of triaminobenzene, and 0.6 parts of 2,4-dimercaptophenol, heat to 140°C and stir for 6 hours, remove the solvent, and obtain modified boron nitride;

[0059] S2: Prepare the plating solution: 60g / L sodium citrate dihydrate, 30g / L boric acid, 6g / L ammonium chloride, 80g / L nickel sulfamate, 200g / L iron sulfamate, 0.5g / L sodium lauryl sulfate, 4g / L modified boron nitride, and the rest is deionized water;

[0060] S3: Place the alloy steel liner in the iron-nickel-boron plating solution, set the temperature to 60 ° C, and operate at a constant current DC current density of 4A / dm 3 Electroplating was performed for 15 minutes to obtain an alloy steel lining plate A having a coating A on the surface;

[0061] The alloy steel liner comprises the following chemical composition, in percentage by mass: 0.90% C, 0.55% Si, 0.60% Mn, 0.03% P, 0.02% S, 5.5% Cr, 0.097% Ni, 0.084% Cu, 0.26% Mo, 0.015% V, 0.04% Al, 0.02% Co and 0.02% N, with the remainder being iron and unavoidable impurities;

[0062] S4: Take alloy steel liner A and plate coating B by arc ion plating composite coating equipment: using transition metal boride as target, deposit 400nm coating B under the conditions of 0.1Pa, 600V; obtain alloy steel liner B;

[0063] S5: Take alloy steel liner B and anneal it: heat it to 850℃ and keep it warm for 200 minutes, then cool it to 600℃ with the furnace and air-cool it. Put it into a stainless steel container filled with powdered boronizing agent, seal it and dry it. Place the stainless steel container in a box-type resistance furnace, heat it to 900℃ with the furnace and perform boronizing for 4 hours. The boronizing depth is 0.1mm. A high wear-resistant alloy steel liner is obtained.

[0064] In the above examples, the test methods used are conventional methods unless otherwise specified; the raw materials used are commercially available unless otherwise specified, and the raw material sources are as follows: hexagonal boron nitride powder (BN-100N, Yumu Nano); formic acid (purity 85%, CAS: 64-18-6); concentrated sulfuric acid (C0680152923, Nanjing Reagent); N,N-dimethylformamide (CAS: 68-12-2); epoxy polyethylene glycol (epoxy-polyethylene glycol 1000-epoxy, Shaanxi Xinyan Bomei Biotechnology Co., Ltd.); triaminobenzene ( CAS: 108-72-5); 2,4-dimercaptophenol (CAS: 152993-55-0); sodium citrate dihydrate (S11110, Shanghai Yuanye); boric acid (boric acid GR99.5%, Nanjing Reagent); ammonium chloride (02245, Hunan Jianghai Environmental Protection Industry Co., Ltd.); nickel sulfamate (CAS: 13770-89-3); iron sulfamate (CAS: 14017-39-1); sodium lauryl sulfate (CAS: 151-21-3); nano-ferric oxide (Fe2O3-BC50, Yumu Nano).

[0065] Experiment: Take the high wear-resistant alloy steel liner prepared in Examples 1 to 3 and Comparative Examples 1 to 4; (1) Cut into 30mm × 5mm size specimens, and measure the mass before and after wear using a CFT-I friction and wear tester to calculate the wear mass. The loading load is 60N, the friction mode is ball-disc reciprocating friction, the reciprocating friction stroke is 12mm, the friction speed is 500r / min, and the grinding material is a 5mm spherical new ceramic material Si3N4. The friction time is 30min; (2) Place in a salt spray test chamber, treat with 5wt% sodium chloride at a temperature of 35℃ and a salt spray deposition of 2mL / h for 72h, and calculate the corrosion rate; Specific data are shown in the table below:

[0066] Wear amount (mg) <![CDATA[Corrosion rate (g / cm 2 .h)]]> Example 1 5.82 0.101 Example 2 5.84 0.103 Example 3 5.84 0.102 Comparative Example 1 6.10 0.115 Comparative Example 2 6.99 0.124 Comparative Example 3 6.95 0.120 Comparative Example 4 6.91 0.117

[0067] Conclusion: Comparative Example 1 changes the plating solution composition, does not modify boron nitride, mixes epoxy polyethylene glycol, triaminobenzene, and 2,4-dimercaptophenol and directly adds them to the plating solution, and the performance is not as good as that of the embodiment; Comparative Example 2 does not plate transition metal boride, Comparative Example 3 does not plate coating A, and Comparative Example 4 changes the coating thickness, and the resulting performance all decreases. It can be seen that the coatings and their thicknesses arranged in sequence are of great significance; in summary, the high wear-resistant alloy steel liner prepared by the present invention has good wear resistance and corrosion resistance.

[0068] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations that come within the meaning and range of equivalents of the claims be embraced therein.

Claims

1. A method for preparing a high wear-resistant alloy steel liner, characterized in that: The method comprises the following steps: S1: placing an alloy steel liner in an iron-nickel-boron plating solution and electroplating to obtain an alloy steel liner A having a plating layer A on the surface; S2: Take alloy steel liner A and plate a transition metal boride layer on the surface by arc ion plating, which serves as coating B, to obtain alloy steel liner B; S3: Take alloy steel liner B, anneal it and then boronize it to obtain a high wear-resistant alloy steel liner; The iron-nickel-boron plating solution comprises the following raw materials: 45-60 g / L sodium citrate dihydrate, 30-35 g / L boric acid, 5-8 g / L ammonium chloride, 80-100 g / L nickel sulfamate, 180-200 g / L iron sulfamate, 0.5-0.8 g / L sodium lauryl sulfate, 2-5 g / L modified boron nitride, and the remainder is deionized water; The preparation of the modified boron nitride comprises the following steps: taking hydroxylated boron nitride, adding N,N-dimethylformamide, dispersing uniformly, adding epoxy polyethylene glycol, triaminobenzene, and 2,4-dimercaptophenol, heating to 135-140° C., stirring for 4-6 hours, and removing the solvent to obtain the modified boron nitride; The modified boron nitride comprises the following raw materials, calculated by mass: 10-12 parts of hydroxylated boron nitride, 60-80 parts of N,N-dimethylformamide, 1-2 parts of epoxy polyethylene glycol, 0.1-0.2 parts of triaminobenzene, and 0.5-0.8 parts of 2,4-dimercaptophenol; The electroplating process is as follows: temperature 55-65°C, constant current DC current density 3-5A / dm 3 Electroplating for 20-30 minutes; The arc ion plating process is as follows: take alloy steel liner A, use transition metal boride Fe2B as target, and deposit 200-300nm of coating B under the conditions of 0.1-0.2Pa and 600-800V to obtain alloy steel liner B; The process of boronizing after annealing is as follows: taking the alloy steel liner B, annealing it and placing it in a stainless steel container filled with a powdered boronizing agent, sealing and drying it; heating the stainless steel container to 900-950° C. and performing boronizing for 3-4 hours, with a boronizing depth of 0.1-0.15 mm, to obtain a highly wear-resistant alloy steel liner; The specific annealing process is: heating to 800-850°C and then keeping the temperature for 200-220 minutes, then cooling to 550-600°C with the furnace and then air cooling.

2. The method for preparing a high wear-resistant alloy steel liner according to claim 1, characterized in that: The alloy steel lining plate includes the following chemical components, in percentage by mass: carbon 0.7-1.0%, silicon 0.3-0.8%, manganese 0.5-1.0%, chromium 4.0-7.0%, vanadium 0.01-0.02%, molybdenum 0.1-0.5%, copper 0.05-0.1%, nickel 0.08-0.1%, nitrogen 0.01-0.03%, aluminum 0.02-0.05%, cobalt 0.01-0.03%, phosphorus ≤0.035%, sulfur ≤0.03%, and the balance is iron and unavoidable impurities.