Wear-resistant and corrosion-resistant nuclear power high-temperature chain and preparation process thereof

Abstract

The invention relates to the technical field of alloys, and discloses a wear-resistant and corrosion-resistant nuclear power high-temperature chain and a preparation process thereof. Comprising the following steps that S1, raw materials are sequentially subjected to electric furnace smelting, LF refining, VD degassing and continuous casting, and a casting blank is obtained; slowly cooling the casting blank, heating the casting blank to 1250-1350 DEG C, preserving heat for 4-5 hours, descaling, rolling, slowly cooling, heating the casting blank to 650-750 DEG C, and preserving heat for 6-8 hours to obtain matrix steel; the method comprises the following steps: pretreating matrix steel to obtain pretreated matrix steel, placing the pretreated matrix steel in an electroplating solution for electroplating to obtain primary plated steel, and placing the primary plated steel in a chemical plating solution for chemical plating to obtain secondary plated steel; the secondary plated steel is used as steel for the chain; and S2, ring knitting, welding, heat treatment and pre-stretching are conducted on the steel warp for the chain, and the chain is obtained. And the obtained chain has good wear resistance and corrosion resistance.

Description

Technical Field

[0001] This invention relates to the field of alloy technology and discloses a wear-resistant and corrosion-resistant high-temperature nuclear power chain and its preparation process. Background Technology

[0002] In the nuclear power industry, chains serve as critical transmission and load-bearing components, and their performance directly impacts the overall stability and safety of the equipment. During transmission, chains are constantly in a state of high-frequency meshing and relative sliding, resulting in concentrated contact stress and easy wear on the contact surfaces; therefore, excellent wear resistance is essential. Simultaneously, due to the highly corrosive nature of the working environment, excellent corrosion resistance is also required. Phosphating the metal surface of the chain can significantly improve wear and corrosion resistance; however, the phosphating process is difficult, and existing phosphating technologies cannot meet the wear and corrosion resistance requirements of high-temperature nuclear power chains. Therefore, researching a wear-resistant and corrosion-resistant high-temperature nuclear power chain and its fabrication process is of great significance. Summary of the Invention

[0003] The purpose of this invention is to provide a wear-resistant and corrosion-resistant high-temperature nuclear power chain and its manufacturing process, so as to solve the problems mentioned in the background art.

[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a manufacturing process for a wear-resistant and corrosion-resistant high-temperature nuclear power chain, comprising the following steps: S1: The raw materials are sequentially smelted in an electric furnace, refined by LF, degassed by VD, and continuously cast to obtain a billet; the billet is placed in a slow cooling pit and slow-cooled for 40~70h, then removed from the pit, heated to 1250~1350℃ and held for 4~5h, descaled by high-pressure water and then rolled, with an initial rolling temperature ≥1000℃ and a final rolling temperature ≥800℃. After rolling, it is placed in a pit for slow cooling for 40~70h, then heated to 650~750℃ and held for 6~8h to obtain the base steel; the base steel is used as the steel for the chain; S2: The chain is made by warp knitting steel rings, welding, heat treatment, and pre-stretching.

[0005] More preferably, the base steel comprises the following components: C: 0.3~0.4%, Si: 0.5~1.0%, Mn: 0.5~1.0%, Cr: 0.4~0.9%, Ni: 1.0~2.0%, Mo: 0.1~0.2%, V: 0.01~0.02%, Cu: 0.2~0.3%, Al: 0.03~0.05%, with the balance being Fe and unavoidable impurities.

[0006] In a more optimized manner, the base steel is pretreated and then electroplated in an electroplating solution to obtain a first-coated steel material, and then electroplated in a chemical plating solution to obtain a second-coated steel material; the second-coated steel material is used as the steel for the chain. The electroplating solution comprises the following components: 100-150 g / L nickel sulfate, 15 g / L nickel chloride, 40-45 g / L boric acid, 0.5-1 g / L nano silica, 3-5 g / L silica-modified alumina, 0.1-0.3 g / L sodium dodecyl sulfate, 0.5-1.5 g / L sodium saccharin, and the remainder is water; The electroless plating solution comprises the following components: 30-40 g / L nickel sulfate, 1-2 g / L nano silica, 5-8 g / L silica-modified alumina, 35-40 g / L sodium hypophosphite, 20-25 g / L sodium citrate, 10-12 g / L sodium acetate, 15-18 mL / L lactic acid, 0.1-0.3 g / L sodium dodecyl sulfate, 0.3-0.5 g / L sodium saccharin, and the remainder is water.

[0007] In a more optimized manner, the base steel is pretreated to obtain pretreated base steel. The pretreatment specifically includes the following steps: taking the base steel, immersing it in an alkaline washing solution, cleaning it for 2-5 minutes under the conditions of a current of 2-3A and a voltage of 4-5V, taking it out and rinsing it with water; immersing it in a hydrochloric acid aqueous solution with a volume fraction of 30-35% for 30-40 seconds, taking it out, rinsing it with water, and drying it to obtain the pretreated base steel. The components of the alkaline washing solution are: sodium hydroxide 20~25g / L, sodium silicate 8~10g / L, trisodium phosphate 20~30g / L, sodium carbonate 10~20g / L, and the remainder is water.

[0008] A more optimized electroplating process is as follows: plating temperature 40~50℃, current density 4~6A / dm³. 2 The plating time is 10-15 minutes, and the electroplating pH is 4-5. Chemical plating process; plating temperature 75~85℃, plating time 10~15min, chemical plating pH 4~5.

[0009] In a more optimized manner, the nano-silica is modified with a silane coupling agent, and the nano-silica particle size is 20~50nm.

[0010] In a more optimized manner, the preparation of silica-modified alumina includes the following steps: alumina and hexadecyltrimethylammonium bromide are added to an ethanol aqueous solution and dispersed evenly. Ammonia is added to adjust the pH to 8-9.5. Under the condition of continuous stirring at 30-35℃, an ethanol solution of tetraethyl orthosilicate is added and kept at this temperature for 10-20 hours. A silane coupling agent is added and kept at this temperature for another 2-4 hours. The mixture is then filtered, washed, and dried to obtain silica-modified alumina.

[0011] In a more optimized manner, the silica-modified alumina comprises the following raw materials, by mass parts: 1-2 parts alumina, 0.5-1 parts cetyltrimethylammonium bromide, 1-2 parts tetraethyl orthosilicate, and 4-5 parts silane coupling agent.

[0012] For optimal performance, KH550 is selected as the silane coupling agent.

[0013] Ideally, the alumina particle size is 1~3μm.

[0014] Compared with existing technologies, the beneficial effects achieved by this invention are as follows: After obtaining the base steel, it is subjected to two plating processes: the first plating is electroplating, where the electroplated nickel layer itself has excellent wear resistance and corrosion resistance, and due to its strong adhesion to the steel substrate, it is suitable as a base layer; silica-modified alumina and nano-silica are also added to the electroplating solution. Silica and alumina have high wear resistance and high corrosion resistance. Introducing them into the plating layer not only enhances the performance of the electroplated layer, but also gives the plating layer a certain roughness, enhancing the mechanical bonding force between the subsequent phosphorus plating layer and this layer, and improving the problem of low coating strength when phosphorus plating on smooth surfaces. Among them, coating modified alumina with silica can improve the dispersion uniformity, avoid plating defects, and improve the problem of weak interfacial bonding force between alumina and the metal plating layer when alumina is directly electroplated. Alumina with a particle size of 1~3μm is selected so that it can fully exert its wear and corrosion resistance; the nano-silica has a particle size of 20~50nm, which acts as lubricating particles and optimizes the plating quality. The amount of the two substances mentioned above needs to be controlled. Adding too much will result in uneven particle dispersion in the coating, which will affect the coating quality.

[0015] The second plating is chemical plating, which forms a denser wear-resistant and corrosion-resistant layer. Due to the certain roughness of the previous electroplating layer, the chemically plated phosphorus layer has good adhesion. At the same time, more silica-modified alumina and nano-silica are introduced into this layer to further optimize the corrosion and wear resistance.

[0016] In summary, a highly wear-resistant and corrosion-resistant surface coating is obtained through a two-stage plating process. Detailed Implementation

[0017] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] It should be noted that there are no special restrictions on the manufacturers of the raw materials involved in this invention. Exemplary examples include: alumina (1μm); nano-silica (ML-SiO2-N22, which is a spherical silica with a particle size of 20nm modified by KH550). Example 1: S1: Take the base steel, immerse it in alkaline cleaning solution, clean it for 3 minutes under the conditions of current of 2A and voltage of 5V, take it out and wash it with water; immerse it in a 35% hydrochloric acid aqueous solution for 30 seconds; obtain the pretreated base steel; The alkaline washing solution consists of: 20 g / L sodium hydroxide, 10 g / L sodium silicate, 30 g / L trisodium phosphate, 20 g / L sodium carbonate, and the remainder is water. S2: Take the pretreated base steel, place it in the electroplating solution, and perform electroplating to obtain a one-time coated steel. Electroplating solution: 120 g / L nickel sulfate, 15 g / L nickel chloride, 40 g / L boric acid, 4 g / L silica-modified alumina, 0.2 g / L sodium dodecyl sulfate, 0.8 g / L nano silica, 1 g / L sodium saccharin; Electroplating process: Temperature 45℃, Current density 4A / dm 2 Time: 15 min; pH: 4.5; Preparation of silica-modified alumina: Take 100 parts of 75wt% ethanol aqueous solution, 1 part of alumina, and 0.5 parts of hexadecyltrimethylammonium bromide, ultrasonically disperse for 1 hour, add ammonia water to adjust the pH to 9, and under continuous stirring at 30℃, add 15 parts of ethanol solution of tetraethyl orthosilicate (containing 2 parts of tetraethyl orthosilicate) dropwise over 2 hours, keep warm for 15 hours, add 4 parts of silane coupling agent KH550, continue to keep warm for 4 hours, filter, wash, and dry to obtain silica-modified alumina; S3: Take the steel material that has been plated once, place it in a chemical plating solution, and perform chemical plating to obtain steel material that has been plated twice. This steel material is used for the chain. Chemical plating solution: 35 g / L nickel sulfate, 6 g / L silica-modified alumina, 40 g / L sodium hypophosphite, 20 g / L sodium citrate, 10 g / L sodium acetate, 15 mL / L lactic acid, 1 g / L nano silica, 0.2 g / L sodium dodecyl sulfate, 0.5 g / L sodium saccharin; Chemical plating process: temperature 80℃, plating time 15min; pH 4.5.

[0019] Example 2: S1: Take the base steel, immerse it in alkaline cleaning solution, clean it for 3 minutes under the conditions of current of 2A and voltage of 5V, take it out and wash it with water; immerse it in a 35% hydrochloric acid aqueous solution for 30 seconds; obtain the pretreated base steel; The alkaline washing solution consists of: 20 g / L sodium hydroxide, 10 g / L sodium silicate, 30 g / L trisodium phosphate, 20 g / L sodium carbonate, and the remainder is water. S2: Take the pretreated base steel, place it in the electroplating solution, and perform electroplating to obtain a one-time coated steel. Electroplating solution: 100g / L nickel sulfate, 15g / L nickel chloride, 40g / L boric acid, 5g / L silica-modified alumina, 0.1g / L sodium dodecyl sulfate, 1g / L nano silica, 1g / L sodium saccharin; Electroplating process: Temperature 50℃, Current density 6A / dm 2 Time: 10 min; pH: 4.5; Preparation of silica-modified alumina: Take 100 parts of 75wt% ethanol aqueous solution, 1 part of alumina, and 0.5 parts of cetyltrimethylammonium bromide, ultrasonically disperse for 1 hour, add ammonia water to adjust the pH to 9, and under continuous stirring at 30℃, add 15 parts of ethanol solution of tetraethyl orthosilicate (containing 2 parts of tetraethyl orthosilicate) dropwise over 2 hours, keep warm for 15 hours, add 4 parts of KH550, continue to keep warm for 4 hours, filter, wash, and dry to obtain silica-modified alumina; S3: Take the steel material that has been plated once, place it in a chemical plating solution, and perform chemical plating to obtain steel material that has been plated twice. This steel material is used for the chain. Chemical plating solution: 40 g / L nickel sulfate, 5 g / L silica-modified alumina, 40 g / L sodium hypophosphite, 25 g / L sodium citrate, 12 g / L sodium acetate, 18 mL / L lactic acid, 1 g / L nano silica, 0.1 g / L sodium dodecyl sulfate, 0.5 g / L sodium saccharin; Chemical plating process: temperature 75℃, plating time 15min; pH 4.5.

[0020] Example 3: S1: Take the base steel, immerse it in alkaline cleaning solution, clean it for 3 minutes under the conditions of current of 2A and voltage of 5V, take it out and wash it with water; immerse it in a 35% hydrochloric acid aqueous solution for 30 seconds; obtain the pretreated base steel; The alkaline washing solution consists of: 20 g / L sodium hydroxide, 10 g / L sodium silicate, 30 g / L trisodium phosphate, 20 g / L sodium carbonate, and the remainder is water. S2: Take the pretreated base steel, place it in the electroplating solution, and perform electroplating to obtain a one-time coated steel. Electroplating solution: 150g / L nickel sulfate, 15g / L nickel chloride, 45g / L boric acid, 4g / L silica-modified alumina, 0.1g / L sodium dodecyl sulfate, 1g / L nano silica, 1.5g / L sodium saccharin; Electroplating process: Temperature 45℃, Current density 5A / dm 2 Time: 15 min; pH: 4.5; Preparation of silica-modified alumina: Take 100 parts of 75wt% ethanol aqueous solution, 1 part of alumina, and 0.5 parts of hexadecyltrimethylammonium bromide, ultrasonically disperse for 1 hour, add ammonia water to adjust the pH to 9, and under continuous stirring at 30℃, add 15 parts of ethanol solution of tetraethyl orthosilicate (containing 1 part of tetraethyl orthosilicate) dropwise over 2 hours, keep warm for 15 hours, add 4 parts of KH550, continue to keep warm for 4 hours, filter, wash, and dry to obtain silica-modified alumina; S3: Take the steel material that has been plated once, place it in a chemical plating solution, and perform chemical plating to obtain steel material that has been plated twice. This steel material is used for the chain. Chemical plating solution: 35 g / L nickel sulfate, 8 g / L silica-modified alumina, 40 g / L sodium hypophosphite, 25 g / L sodium citrate, 12 g / L sodium acetate, 18 mL / L lactic acid, 1 g / L nano silica, 0.3 g / L sodium dodecyl sulfate, 0.5 g / L sodium saccharin; Chemical plating process: temperature 85℃, plating time 12min; pH 4.5.

[0021] Comparative Example 1 (no silica-modified alumina was added to the electroplating solution, and the other steps were the same as in Example 1): S1: Take the base steel, immerse it in the alkaline washing solution, and clean it for 3 minutes under the conditions of 2A current and 5V voltage. Take it out and wash it with water; immerse it in a 35% hydrochloric acid aqueous solution for 30 seconds; and obtain the pretreated base steel. The alkaline washing solution consists of: 20 g / L sodium hydroxide, 10 g / L sodium silicate, 30 g / L trisodium phosphate, 20 g / L sodium carbonate, and the remainder is water. S2: Take the pretreated base steel, place it in the electroplating solution, and perform electroplating to obtain a one-time coated steel. Electroplating solution: 120 g / L nickel sulfate, 15 g / L nickel chloride, 40 g / L boric acid, 0.2 g / L sodium dodecyl sulfate, 0.8 g / L nano silica, 1 g / L sodium saccharin; Electroplating process: Temperature 45℃, Current density 4A / dm 2 Time: 15 min; pH: 4.5; Preparation of silica-modified alumina: Take 100 parts of 75wt% ethanol aqueous solution, 1 part of alumina, and 0.5 parts of hexadecyltrimethylammonium bromide, ultrasonically disperse for 1 hour, add ammonia water to adjust the pH to 9, and under continuous stirring at 30℃, add 15 parts of ethanol solution of tetraethyl orthosilicate (containing 2 parts of tetraethyl orthosilicate) dropwise over 2 hours, keep warm for 15 hours, add 4 parts of silane coupling agent KH550, continue to keep warm for 4 hours, filter, wash, and dry to obtain silica-modified alumina; S3: Take the steel material that has been plated once, place it in a chemical plating solution, and perform chemical plating to obtain steel material that has been plated twice. This steel material is used for the chain. Chemical plating solution: 35 g / L nickel sulfate, 6 g / L silica-modified alumina, 40 g / L sodium hypophosphite, 20 g / L sodium citrate, 10 g / L sodium acetate, 15 mL / L lactic acid, 1 g / L nano silica, 0.2 g / L sodium dodecyl sulfate, 0.5 g / L sodium saccharin; Chemical plating process: temperature 80℃, plating time 15min; pH 4.5.

[0022] Comparative Example 2 (increase the amount of silica-modified alumina in the electroplating solution, and the rest of the methods and steps are the same as in Example 1): S1: Take the base steel, immerse it in the alkaline washing solution, clean it for 3 minutes under the conditions of current of 2A and voltage of 5V, take it out and wash it with water; immerse it in a 35% hydrochloric acid aqueous solution for 30 seconds; obtain the pretreated base steel; The alkaline washing solution consists of: 20 g / L sodium hydroxide, 10 g / L sodium silicate, 30 g / L trisodium phosphate, 20 g / L sodium carbonate, and the remainder is water. S2: Take the pretreated base steel, place it in the electroplating solution, and perform electroplating to obtain a one-time coated steel. Electroplating solution: 120 g / L nickel sulfate, 15 g / L nickel chloride, 40 g / L boric acid, 8 g / L silica-modified alumina, 0.2 g / L sodium dodecyl sulfate, 0.8 g / L nano silica, 1 g / L sodium saccharin; Electroplating process: Temperature 45℃, Current density 4A / dm 2 Time: 15 min; pH: 4.5; Preparation of silica-modified alumina: Take 100 parts of 75wt% ethanol aqueous solution, 1 part of alumina, and 0.5 parts of hexadecyltrimethylammonium bromide, ultrasonically disperse for 1 hour, add ammonia water to adjust the pH to 9, and under continuous stirring at 30℃, add 15 parts of ethanol solution of tetraethyl orthosilicate (containing 2 parts of tetraethyl orthosilicate) dropwise over 2 hours, keep warm for 15 hours, add 4 parts of silane coupling agent KH550, continue to keep warm for 4 hours, filter, wash, and dry to obtain silica-modified alumina; S3: Take the steel material that has been plated once, place it in a chemical plating solution, and perform chemical plating to obtain steel material that has been plated twice. This steel material is used for the chain. Chemical plating solution: 35 g / L nickel sulfate, 6 g / L silica-modified alumina, 40 g / L sodium hypophosphite, 20 g / L sodium citrate, 10 g / L sodium acetate, 15 mL / L lactic acid, 1 g / L nano silica, 0.2 g / L sodium dodecyl sulfate, 0.5 g / L sodium saccharin; Chemical plating process: temperature 80℃, plating time 15min; pH 4.5.

[0023] Comparative Example 3 (using modified alumina instead of silica-modified alumina, with the remaining steps being the same as in Example 1): S1: Take the base steel, immerse it in alkaline washing solution, and clean it for 3 minutes under the conditions of 2A current and 5V voltage, then take it out and wash it with water; immerse it in a 35% hydrochloric acid aqueous solution for 30 seconds; obtain the pretreated base steel; The alkaline washing solution consists of: 20 g / L sodium hydroxide, 10 g / L sodium silicate, 30 g / L trisodium phosphate, 20 g / L sodium carbonate, and the remainder is water. S2: Take the pretreated base steel, place it in the electroplating solution, and perform electroplating to obtain a one-time coated steel. Electroplating solution: 120 g / L nickel sulfate, 15 g / L nickel chloride, 40 g / L boric acid, 4 g / L modified alumina, 0.2 g / L sodium dodecyl sulfate, 0.8 g / L nano silica, 1 g / L sodium saccharin; Electroplating process: Temperature 45℃, Current density 4A / dm 2 Time: 15 min; pH: 4.5; Preparation of the modified alumina: Take 100 parts of 75wt% ethanol aqueous solution and 10 parts of alumina, mix them evenly, adjust the pH to 5, add 1 part of silane coupling agent KH550, keep warm at 50℃ for 4h, filter, wash and dry to obtain modified alumina. S3: Take the steel material that has been plated once, place it in a chemical plating solution, and perform chemical plating to obtain steel material that has been plated twice. This steel material is used for the chain. Chemical plating solution: 35 g / L nickel sulfate, 6 g / L modified alumina, 40 g / L sodium hypophosphite, 20 g / L sodium citrate, 10 g / L sodium acetate, 15 mL / L lactic acid, 1 g / L nano silica, 0.2 g / L sodium dodecyl sulfate, 0.5 g / L sodium saccharin; Chemical plating process: temperature 80℃, plating time 15min; pH 4.5.

[0024] Comparative Example 4 (using 1μm silica instead of nano silica, the remaining methods and steps are the same as in the example): S1: Take the base steel, immerse it in alkaline washing solution, clean it for 3 minutes under the conditions of current of 2A and voltage of 5V, take it out and wash it with water; immerse it in a 35% hydrochloric acid aqueous solution for 30 seconds; obtain the pretreated base steel; The alkaline washing solution consists of: 20 g / L sodium hydroxide, 10 g / L sodium silicate, 30 g / L trisodium phosphate, 20 g / L sodium carbonate, and the remainder is water. S2: Take the pretreated base steel, place it in the electroplating solution, and perform electroplating to obtain a one-time coated steel. Electroplating solution: 120 g / L nickel sulfate, 15 g / L nickel chloride, 40 g / L boric acid, 4 g / L silica-modified alumina, 0.2 g / L sodium dodecyl sulfate, 0.8 g / L 1 μm silica, 1 g / L sodium saccharin; Electroplating process: Temperature 45℃, Current density 4A / dm 2 Time: 15 min; pH: 4.5; Preparation of silica-modified alumina: Take 100 parts of 75wt% ethanol aqueous solution, 1 part of alumina, and 0.5 parts of hexadecyltrimethylammonium bromide, ultrasonically disperse for 1 hour, add ammonia water to pH 9, and under continuous stirring at 30℃, add 15 parts of ethanol solution of tetraethyl orthosilicate (containing 2 parts of tetraethyl orthosilicate) dropwise over 2 hours, keep warm for 15 hours, add 4 parts of silane coupling agent KH550, continue to keep warm for 4 hours, filter, wash, and dry to obtain silica-modified alumina; S3: Take the steel material that has been plated once, place it in a chemical plating solution, and perform chemical plating to obtain steel material that has been plated twice. This steel material is used for the chain. Chemical plating solution: 35 g / L nickel sulfate, 6 g / L silica-modified alumina, 40 g / L sodium hypophosphite, 20 g / L sodium citrate, 10 g / L sodium acetate, 15 mL / L lactic acid, 1 g / L 1 μm silica, 0.2 g / L sodium dodecyl sulfate, 0.5 g / L sodium saccharin; Chemical plating process: temperature 80℃, plating time 15min; pH 4.5.

[0025] Performance Test 1: Chain steel prepared in Examples 1-3 and Comparative Examples 1-4 was used; (1) Salt spray test according to ASTM-B117-2011 was performed using 5wt% sodium chloride solution at 35°C for 720 hours, and the corrosion rate was calculated in g / cm³. 2 ·h; (2) Calculate the wear amount, in units of 10 -3 g / (N·m); Experimental conditions: load 400g, rotation speed 250rpm, friction 30min; see Table 1 for details; Table 1:

[0026] In Comparative Example 1, the electroplating solution without added silica-modified alumina showed a significant performance decrease. Comparative Example 2 increased the amount of silica-modified alumina in the electroplating solution, while Comparative Example 3 used modified alumina instead of silica-modified alumina (i.e., no silica coating). Due to uneven dispersion, the performance was also inferior to the examples. This demonstrates that the preparation process and dosage of silica-modified alumina must be controlled to achieve excellent technical results. Comparative Example 4 used 1μm silica instead of nano-silica; the change in particle size altered dispersibility and reduced lubrication, leading to performance degradation. Therefore, particle size also needs to be controlled. In summary, the chain steel prepared using this method exhibits excellent wear resistance and corrosion resistance.

[0027] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A manufacturing process for a wear-resistant and corrosion-resistant high-temperature nuclear power chain, characterized in that: Includes the following steps: S1: The raw materials are successively smelted in an electric furnace, refined by LF, degassed by VD, and continuously cast to obtain a billet; the billet is slowly cooled, heated to 1250~1350℃ and held for 4~5 hours, descaled, rolled, slowly cooled, heated to 650~750℃ and held for 6~8 hours to obtain the base steel; the base steel is used as the steel for the chain; S2: The chain is made by warp knitting steel rings, welding, heat treatment, and pre-stretching.

2. The manufacturing process of a wear-resistant and corrosion-resistant high-temperature nuclear power chain according to claim 1, characterized in that: The composition of the base steel by mass percentage is as follows: C: 0.3~0.4%, Si: 0.5~1.0%, Mn: 0.5~1.0%, Cr: 0.4~0.9%, Ni: 1.0~2.0%, Mo: 0.1~0.2%, V: 0.01~0.02%, Cu: 0.2~0.3%, Al: 0.03~0.05%, with the balance being Fe and unavoidable impurities.

3. The manufacturing process of a wear-resistant and corrosion-resistant high-temperature nuclear power chain according to claim 1, characterized in that: The base steel is pretreated to obtain pretreated base steel, which is then electroplated in an electroplating solution to obtain a first-coated steel, and then electroplated in a chemical plating solution to obtain a second-coated steel; the second-coated steel is used as the steel for the chain. The electroplating solution comprises the following components: 100-150 g / L nickel sulfate, 15 g / L nickel chloride, 40-45 g / L boric acid, 0.5-1 g / L nano silica, 3-5 g / L silica-modified alumina, 0.1-0.3 g / L sodium dodecyl sulfate, 0.5-1.5 g / L sodium saccharin, and the remainder is water; The electroless plating solution comprises the following components: 30-40 g / L nickel sulfate, 1-2 g / L nano silica, 5-8 g / L silica-modified alumina, 35-40 g / L sodium hypophosphite, 20-25 g / L sodium citrate, 10-12 g / L sodium acetate, 15-18 mL / L lactic acid, 0.1-0.3 g / L sodium dodecyl sulfate, 0.3-0.5 g / L sodium saccharin, and the remainder is water.

4. The manufacturing process of a wear-resistant and corrosion-resistant high-temperature nuclear power chain according to claim 3, characterized in that: Electroplating process: Plating temperature 40~50℃, current density 4~6A / dm 2 The plating time is 10-15 minutes, and the electroplating pH is 4-5. Chemical plating process; plating temperature 75~85℃, plating time 10~15min, chemical plating pH 4~5.

5. The manufacturing process of a wear-resistant and corrosion-resistant high-temperature nuclear power chain according to claim 3, characterized in that: The nano-silica is modified with a silane coupling agent, and the nano-silica particle size is 20~50nm.

6. The manufacturing process of a wear-resistant and corrosion-resistant high-temperature nuclear power chain according to claim 3, characterized in that: The preparation of silica-modified alumina includes the following steps: Alumina and hexadecyltrimethylammonium bromide were added to an ethanol aqueous solution and dispersed evenly. Ammonia was added to adjust the pH to 8-9.

5. Under the condition of continuous stirring at 30-35℃, an ethanol solution of tetraethyl orthosilicate was added and kept at this temperature for 10-20 hours. A silane coupling agent was added and kept at this temperature for another 2-4 hours. The mixture was then filtered, washed, and dried to obtain silica-modified alumina.

7. The manufacturing process of a wear-resistant and corrosion-resistant high-temperature nuclear power chain according to claim 6, characterized in that: The silica-modified alumina comprises the following raw materials, by mass: 1-2 parts alumina, 0.5-1 parts cetyltrimethylammonium bromide, 1-2 parts tetraethyl orthosilicate, and 4-5 parts silane coupling agent.

8. The manufacturing process of a wear-resistant and corrosion-resistant high-temperature nuclear power chain according to claim 6, characterized in that: The alumina particle size is 1~3μm.

9. The manufacturing process of a wear-resistant and corrosion-resistant high-temperature nuclear power chain according to claim 3, characterized in that: The pretreatment of the base steel includes the following steps: take the base steel, immerse it in an alkaline washing solution for cleaning, take it out and wash it with water; soak it in a hydrochloric acid aqueous solution, take it out, wash it with water and dry it.

10. The chain prepared by the manufacturing process of a wear-resistant and corrosion-resistant high-temperature nuclear power chain according to any one of claims 1 to 9.

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