Preparation method of high-wear-resistance alloy steel lining plate

Abstract

The invention relates to the technical field of high-wear-resistance alloys, and particularly discloses a preparation method of a high-wear-resistance alloy steel lining plate. The preparation method comprises the following steps that S1, an alloy steel lining plate is placed in a plating solution to be electroplated, and an alloy steel lining plate A with a plating layer A on the surface is obtained; the plating solution comprises the following raw materials: 45-60 g / L of sodium citrate dehydrate, 30-35 g / L of boric acid, 5-8 g / L of ammonium chloride, 80-100 g / L of nickel aminosulfonate, 180-200 g / L of iron aminosulfonate, 0.5-0.8 g / L of lauryl sodium sulfate, 2-5 g / L of modified boron nitride and the balance of deionized water. S2, an alloy steel lining plate A is taken, the surface of the alloy steel lining plate A is plated with a transition metal boride layer through arc ion plating, the transition metal boride layer serves as a plating layer B, and an alloy steel lining plate B is obtained; and S3, the alloy steel lining plate B is taken, boronizing is conducted after annealing, and the high-wear-resistance alloy steel lining plate is obtained.

Description

Technical Field

[0001] 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. Background Art

[0002] Alloy steel linings need to have high strength, corrosion resistance and wear resistance. The introduction of boron during alloy steel smelting can improve strength and wear resistance, but considering the difficulty of processing and the influence of other elements during processing, if the boron content directly introduced is too low, the performance improvement will not be obvious, and if the content is too high, it may increase the brittleness of the steel, cause cracks, and reduce mechanical properties and corrosion resistance. Therefore, the existing technology often uses the boronization process to introduce boron.

[0003] Boriding is a method in the field of metal material surface treatment. It can improve the surface hardness of the metal, improve wear resistance and corrosion resistance. The quality of the borided layer is affected by the surface state of the metal. If the boriding process is improper, it will also cause the brittleness of the metal surface to increase, which will lead to a decrease in performance. In summary, it is of great significance to study a method for preparing an alloy steel liner 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 highly wear-resistant alloy steel liner, comprising the following steps: S1: placing the alloy steel liner in an iron-nickel-boron plating solution, electroplating, and obtaining 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 dodecyl 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, removing the solvent, and obtaining 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 prior art: 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, 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, use 60Coγ-ray irradiation for 24 hours, the absorbed dose rate is 80 to 120Gy / min (calibrated by ferrous sulfate dosimeter), the total absorbed dose is greater than or equal to 100kGy, take out after the irradiation, 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 5h, centrifuging, washing with water, and drying for 24h, 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 24h, with an absorbed dose rate of 113.4Gy / min (calibrated by ferrous sulfate dosimeter), and a total absorbed dose of 163.3kGy. After the irradiation is completed, it 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 process of arc ion plating is: take alloy steel liner A, use transition metal boride Fe2B as target, deposit 200-300nm coating B under 0.1-0.2Pa, 600-800V conditions, and obtain alloy steel liner B.

[0015] More optimally, the preparation of the transition metal boride Fe2B refers to the prior art: take 10 to 12 parts of nano-iron trioxide, 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; switch the reaction atmosphere to hydrogen and boron trichloride, program the temperature 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, and the transition metal boride Fe2B is obtained after the treatment is completed.

[0016] More optimally, the preparation process of the transition metal boride Fe2B is as follows: take 10 parts of nano-iron trioxide, put it 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 down to room temperature in an argon atmosphere; wherein the heating rate is 10°C / min, the pressure is 2 bar, and the flow rate of H2 is 200 mL / min; switch the reaction atmosphere to hydrogen and boron trichloride, program the temperature to 480°C, keep the temperature constant for 6 hours, and then naturally cool down 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, and the transition metal boride Fe2B is obtained after the treatment is completed.

[0017] More optimally, the process of boronizing after annealing is: 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, the boronizing depth is 0.1-0.15mm, and a high wear-resistant alloy steel liner is obtained.

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

[0019] More optimally, the specific process of 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 air cooling out of the furnace.

[0020] More optimally, the alloy steel lining includes the following chemical components, by mass percentage: 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) firstly 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; the layer is used as a base layer, which 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 the surface tension and improve the dispersibility and wettability of the electroplating solution on the surface of the substrate; triaminobenzene is used 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 is conducive 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] The coating B is a transition metal boride layer plated by arc ion plating, which has the advantages of good adhesion, good wear resistance and good corrosion resistance. The pre-plating of transition metal boride is helpful for the subsequent boronization. The boron element in the coating B can also be used as a diffusion starting point to accelerate the boronization speed. At the same time, the boron element in the coating B is evenly distributed, which is helpful for uniform boronization, improving surface defects and improving the bonding strength of the boronized layer.

[0023] After plating 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, and improves uniformity, thereby obtaining a product with high wear resistance and high corrosion resistance. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work 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, 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 dodecyl 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 place the plate under constant current at a DC current density of 4A / dm 3 Under the condition of 25 minutes of electroplating, an alloy steel lining plate A with a coating A on the surface is obtained;

[0029] The alloy steel liner comprises the following chemical compositions, by mass percentage: 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, the remainder being iron and unavoidable impurities;

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

[0031] S5: Take alloy steel lining plate B, anneal: heat to 850℃ and keep warm for 200min, then cool to 600℃ with the furnace and air-cool out of the furnace, put it into a stainless steel container filled with powdered boronizing agent, seal and dry; place the stainless steel container in a box-type resistance furnace, heat to 900℃ with the furnace and perform boronizing for 4 hours, with a boronizing depth of 0.1mm; obtain a high wear-resistant alloy steel lining plate.

[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, 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 dodecyl 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 place the constant current at a DC current density of 5A / dm 3 Under the condition of electroplating for 30 minutes, an alloy steel lining plate A with a coating A on the surface is obtained;

[0035] The alloy steel liner comprises the following chemical compositions, by mass percentage: 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, 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: take transition metal boride as target, and deposit 300nm coating B under 0.1Pa, 600V conditions; obtain alloy steel liner B;

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

[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, 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 dodecyl 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 place the constant current at a DC current density of 5A / dm 3 Under the condition of electroplating for 20 minutes, an alloy steel lining plate A with a coating A on the surface is obtained;

[0041] The alloy steel liner comprises the following chemical compositions, by mass percentage: 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, 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: take transition metal boride as target, and deposit 200nm coating B under 0.1Pa, 600V conditions; obtain alloy steel liner B;

[0043] S5: Take alloy steel lining plate B, anneal: heat to 850℃ and keep warm for 200min, then cool to 600℃ with the furnace and air-cool out of the furnace, put it into a stainless steel container filled with powdered boronizing agent, seal and dry; place the stainless steel container in a box-type resistance furnace, heat to 900℃ with the furnace and perform boronizing for 4 hours, with a boronizing depth of 0.1mm; obtain a high wear-resistant alloy steel lining plate.

[0044] Comparative Example 1 (changing the composition of the plating solution, and the remaining steps are consistent with those of 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 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 dodecyl 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 place the plate under constant current at a DC current density of 4A / dm 3 Under the condition of 25 minutes of electroplating, an alloy steel lining plate A with a coating A on the surface is obtained;

[0047] The alloy steel liner comprises the following chemical compositions, by mass percentage: 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, the remainder being iron and unavoidable impurities;

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

[0049] S5: Take alloy steel lining plate B, anneal: heat to 850℃ and keep warm for 200min, then cool to 600℃ with the furnace and air-cool out of the furnace, put it into a stainless steel container filled with powdered boronizing agent, seal and dry; place the stainless steel container in a box-type resistance furnace, heat to 900℃ with the furnace and perform boronizing for 4 hours, with a boronizing depth of 0.1mm; obtain a high wear-resistant alloy steel lining plate.

[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, 0.6 parts of 2,4-dimercaptophenol, heat to 140°C and stir for 6 hours, remove the solvent, and 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 dodecyl 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 place the plate under constant current at a DC current density of 4A / dm 3 Under the condition of 25 minutes of electroplating, an alloy steel lining plate A with a coating A on the surface is obtained;

[0053] The alloy steel liner comprises the following chemical compositions, by mass percentage: 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, the remainder being iron and unavoidable impurities;

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

[0055] Comparative Example 3 (coating A is not plated, and the remaining steps are consistent with those of Example 1): S1: Take an alloy steel liner and plate a coating B by arc ion plating composite coating equipment: using transition metal boride as a target, deposit a 250nm coating B under 0.1Pa, 600V conditions; obtain an alloy steel liner B;

[0056] The alloy steel liner comprises the following chemical compositions, by mass percentage: 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, the remainder being iron and unavoidable impurities;

[0057] S2: Take alloy steel lining B, anneal: heat to 850℃ and keep warm for 200min, then cool to 600℃ with the furnace and air-cool, put into a stainless steel container filled with powdered boronizing agent, seal and dry; place the stainless steel container in a box-type resistance furnace, heat to 900℃ with the furnace and perform boronizing for 4 hours, with a boronizing depth of 0.1mm; obtain a high wear-resistant alloy steel lining.

[0058] Comparative Example 4 (changing the electroplating process and the thickness of the coating B, and the 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, 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 dodecyl 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 place the plate under constant current at a DC current density of 4A / dm 3 Under the condition of 15 minutes of electroplating, an alloy steel lining plate A with a coating A on the surface is obtained;

[0061] The alloy steel liner comprises the following chemical compositions, by mass percentage: 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, 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: take transition metal boride as target, and deposit 400nm coating B under 0.1Pa, 600V conditions; obtain alloy steel liner B;

[0063] S5: Take alloy steel lining plate B, anneal: heat to 850℃ and keep warm for 200min, then cool to 600℃ with the furnace and air-cool out of the furnace, put it into a stainless steel container filled with powdered boronizing agent, seal and dry; place the stainless steel container in a box-type resistance furnace, heat to 900℃ with the furnace and perform boronizing for 4 hours, with a boronizing depth of 0.1mm; obtain a high wear-resistant alloy steel lining plate.

[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 sources of the raw materials 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); ferric sulfamate (CAS: 14017-39-1); sodium dodecyl sulfate (CAS: 151-21-3); nano-iron trioxide (Fe2O3-BC50, Yumu Nano).

[0065] Experiment: Take the high wear-resistant alloy steel lining prepared in Examples 1 to 3 and Comparative Examples 1 to 4; (1) Cut into Φ30mm×5mm 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, and the friction time is 30min; (2) Place in a salt spray test box, treat with 5wt% sodium chloride, at a temperature of 35°C and a salt spray deposition of 2mL / h for 72h, and calculate the corrosion rate; Specific data are shown in the following table:

[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: In Comparative Example 1, the composition of the plating solution is changed, and the boron nitride is not modified. The epoxy polyethylene glycol, triaminobenzene and 2,4-dimercaptophenol are mixed and directly added into the plating solution, and the performance is not as good as that in the embodiment; in Comparative Example 2, transition metal boride is not plated, in Comparative Example 3, coating A is not plated, and in Comparative Example 4, the coating thickness is changed, and the obtained performances are all decreased. 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 excellent 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 present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

Claims

1. A method for preparing a high wear-resistant alloy steel liner, characterized in that: The following steps are involved: S1: placing the alloy steel lining plate in an iron-nickel-boron plating solution for electroplating to obtain an alloy steel lining plate 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 is used 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.

2. The method for preparing a high wear-resistant alloy steel liner according to claim 1, characterized in that: The iron-nickel-boron 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 dodecyl sulfate, 2-5 g / L of modified boron nitride, and the rest is deionized water.

3. The method for preparing a high wear-resistant alloy steel liner according to claim 1, characterized in that: The preparation of the modified boron nitride comprises the following steps: Take hydroxylated boron nitride, add N,N-dimethylformamide, disperse evenly, add epoxy polyethylene glycol, triaminobenzene, 2,4-dimercaptophenol, heat to 135-140°C and stir for 4-6 hours, remove the solvent, and obtain modified boron nitride.

4. The method for preparing a high wear-resistant alloy steel liner according to claim 3, characterized in that: 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.

5. The method for preparing a high wear-resistant alloy steel liner according to claim 1, characterized in that: The electroplating process is as follows: the temperature is 55-65°C, the constant current DC current density is 3-5A / dm 3 Electroplating for 20 to 30 minutes.

6. The method for preparing a high wear-resistant alloy steel liner according to claim 1, characterized in that: The process of arc ion plating is as follows: take alloy steel liner A, use transition metal boride Fe2B as target, deposit 200-300nm coating B under the conditions of 0.1-0.2Pa and 600-800V, and obtain alloy steel liner B.

7. The method for preparing a high wear-resistant alloy steel liner according to claim 1, characterized in that: 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; heat the stainless steel container to 900-950° C. for 3-4 hours of boronizing, the boronizing depth is 0.1-0.15 mm, and a high wear-resistant alloy steel liner is obtained.

8. The method for preparing a high wear-resistant alloy steel liner according to claim 1, characterized in that: 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 air cooling out of the furnace.

9. The method for preparing a high wear-resistant alloy steel liner according to claim 1, characterized in that: The alloy steel lining includes the following chemical components, by mass percentage: 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.