Production process of novel high-wear-resistance oil seal chain

Abstract

This invention discloses a novel high-wear-resistant oil seal chain manufacturing process, belonging to the field of chain manufacturing technology. The process includes the following steps: Pre-treated chain parts are placed in a carburizing furnace at 530-540℃ with an ammonia flow rate of 2.0 L / min and a mixed liquid flow rate of 0.2 L / min for 9 hours to obtain carburized parts; quenching and tempering: the carburized parts are quenched in a heat treatment device at 880-930℃ for 15-30 minutes, followed by tempering at 220-300℃ for 45-60 minutes to obtain intermediate product 1; blackening: intermediate product 1 is held at 300℃ for 1 hour, then immersed in a blackening solution for 15-30 seconds, and removed to obtain intermediate product 2; shot peening followed by assembly yields the novel high-wear-resistant oil seal chain. This oil seal chain not only has good wear resistance but also excellent corrosion resistance.

Description

Technical Field

[0001] This invention belongs to the field of chain manufacturing technology, specifically relating to a new type of high wear-resistant oil seal chain manufacturing process. Background Technology

[0002] An oil-sealed chain has an oil seal at both ends of the axle at each link of the chain. A certain amount of lubricating oil is sealed inside the axle and bushing of each link. The oil seal prevents lubricating oil leakage and protects against the corrosion of sand, dirt, water, and dust from the axle and bushing of each link. Therefore, a high-quality oil-sealed chain is durable, with a lifespan at least three times that of a regular, thickened chain of the same specifications. The disadvantage is that because each link has an oil seal, it feels very tight and stiff, unlike a regular chain, and it is also heavier than regular and thickened chains, consuming relatively more engine power.

[0003] In general, oil seal chains are widely used due to their longer service life compared to ordinary chains. The manufacturing process includes the following steps: heat treatment, where auxiliary media are used at high temperatures to improve the microstructure of the parts, followed by carburizing, quenching, tempering, blackening, shot peening, phosphating, etc. As described in a chain manufacturing process disclosed in Chinese Patent CN110055543B, a high-molecular organic polymerization principle is used to form a black film using the residual heat of tempering during the heat treatment process. However, the specific high-molecular organic polymer used is not disclosed. Considering the current problem of poor wear resistance of oil seal chains, it is necessary to provide a new manufacturing process for high-wear-resistant oil seal chains. Summary of the Invention

[0004] The purpose of this invention is to provide a new manufacturing process for high wear-resistant oil seal chains to solve the problems in the background art.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] A novel manufacturing process for high wear-resistant oil seal chains includes the following steps:

[0007] Step S1: Alkali washing and acid washing are performed on qualified chain parts to obtain pre-treated chain parts;

[0008] Step S2: Place the pretreated chain parts in a carburizing furnace and maintain the temperature at 530-540℃ with an ammonia flow rate of 2.0L / min and a mixed liquid flow rate of 0.2L / min for 9 hours to obtain carburized parts.

[0009] In the above steps, the carbon element provided in the mixed liquid can form carbonitriding, which improves the surface hardness and penetration depth of the chain parts; the oxygen element provided can generate oxides that slow down corrosion on the surface of the chain parts; and the sulfur element provided can form a loose and porous sulfide layer on the surface of the chain parts, which is beneficial for grease storage, reduces the coefficient of friction, and improves the wear resistance of the chain parts.

[0010] Step S3, Quenching and Tempering: Quench the infiltration treated parts in a heat treatment equipment at a quenching temperature of 880-930℃ for 15-30 min, and then temper them at a temperature of 220-300℃ for 45-60 min to obtain intermediate product 1.

[0011] Step S4, Blackening: Incubate intermediate product 1 at 300℃ for 1 hour, then place it in blackening solution for 15-30 seconds, remove it, and obtain intermediate product 2.

[0012] Step S5, shot peening: Use a shot peening machine to spray steel shot onto intermediate product 2 to improve the surface fatigue strength of intermediate product 2. Then assemble intermediate product 2, install oil seal rubber ring and lubricating oil to obtain a new type of high wear-resistant oil seal chain.

[0013] As a further technical solution of the present invention, the chain parts in step S1 include inner and outer chain plates, pins, sleeves and rollers, all of which are made of 45# steel and / or A3 steel.

[0014] As a further technical solution of the present invention, the alkaline washing step in step S1 is as follows: degreasing in a 10-25wt% sodium hydroxide aqueous solution at a temperature of 40-80℃ for 5-15 minutes, followed by water washing and drying.

[0015] As a further technical solution of the present invention, the pickling step in step S1 is as follows: remove rust in a 5-20wt% hydrochloric acid aqueous solution at a temperature of 40-60℃ for 5-15 minutes, followed by water washing and drying.

[0016] As a further technical solution of the present invention, the mixed liquid in step S2 is composed of ethanol and carbon disulfide in a volume ratio of 4:1.

[0017] As a further technical solution of the present invention, in step S5, the diameter of the shot used in the shot peening process is 0.2-2.5mm, the compressed air is 0.2-0.6MPa, and the angle between the jet and the surface is 30-90°.

[0018] As a further technical solution of the present invention, the blackening liquid is prepared through the following steps:

[0019] Prepare the following raw materials by weight: 30-40 parts water-based epoxy acrylic resin, 3-5 parts methyl etherified amino resin, 5-8 parts modified silicon carbide, 2-4 parts water-based color paste, 0.3-0.5 parts corrosion inhibitor, 1 part coupling agent, 1 part leveling agent, 0.2 parts bactericide, and 0.2 parts defoamer. Mix the above raw materials evenly according to the proportions to obtain the blackening solution.

[0020] As a further technical solution of the present invention, modified silicon carbide is prepared by the following steps:

[0021] Step A1: Add SiC powder to 1wt% hydrochloric acid solution and mix. Stir and react for 4-5 hours. Centrifuge, precipitate and dry to obtain pretreated SiC powder.

[0022] Step A2: Add the pretreated SiC powder to a three-necked flask containing anhydrous ethanol, a thermometer, and a reflux device. Add coupling agent KH-560 and stir the reaction at 80°C for 3-4 hours. Filter the mixture, wash the filter cake with anhydrous ethanol, and dry it at 80°C to obtain surface-modified SiC powder.

[0023] Step A3: Surface-modified SiC powder, anhydrous ethanol and acrylamide are stirred and reacted at 50°C for 6-8 hours. After the reaction is completed, the mixture is filtered, the filter cake is washed with anhydrous ethanol and dried at 80°C to obtain modified silicon carbide.

[0024] In step S1, the ratio of SiC powder to 1wt% hydrochloric acid solution is 100g:800-1000mL. In step S2, the ratio of pretreated SiC powder, anhydrous ethanol, and coupling agent KH-560 is 10g:150mL:2-3g. In step S3, the ratio of modified SiC powder, anhydrous ethanol, and acrylamide is 10g:100-120mL:2.5-3.5g. First, impurities in the SiC powder are removed using 1wt% hydrochloric acid solution. Then, the SiC powder is modified using coupling agent KH-560 to introduce epoxy groups on the surface of the SiC powder. Finally, acrylamide is grafted onto the surface of the SiC powder through chemical bonds using the ring-opening reaction between amino and epoxy groups to obtain modified silicon carbide.

[0025] As a further technical solution of the present invention, the waterborne epoxy acrylic resin is GS-330, purchased from Changzhou Guangshu Chemical Technology Co., Ltd.; the amino resin is CYMEL303 or CYMEL325, purchased from Cytec Chemical Co., Ltd.; the slow-release agent is one or more of the following: corrosion inhibitor CP-1000 (purchased from Shanghai Pengpan Trading Co., Ltd.), corrosion inhibitor Halox515 (Shanghai Jinhui Chemical Co., Ltd.), and corrosion inhibitor F862 (Shenzhen Rongqiang Technology Co., Ltd.); the color paste is TSEL360W or SIP3070, purchased from Kunshan Shiming Technology Co., Ltd.; the coupling agent is NXH-311W and NXH-410, purchased from Nanjing Xuanhao New Material Technology Co., Ltd.; the leveling agent is Tego WET270 and Tego 655, purchased from German company Tego; the bactericide is BIT20 or IPBC30, purchased from Shanghai Zhenwei Chemical Co., Ltd.; and the defoamer Foamex810 is purchased from German company Tego.

[0026] The beneficial effects of this invention are:

[0027] To address the poor wear resistance of existing oil seal chains, this invention provides a novel manufacturing process for high-wear-resistant oil seal chains. The oil seal chain parts undergo pickling, alkali washing, and then carburizing. During carburizing, a composite carburizing medium is used, including ammonia and a mixture (ethanol and carbon disulfide). The carbon element provided by the mixture forms carbonitriding, increasing the surface hardness and depth of the carburized layer. The oxygen element generates corrosion-resistant oxides on the chain part surface, and the sulfur element forms a loose, porous sulfide layer, which facilitates grease storage, reduces the coefficient of friction, and improves the wear resistance of the chain parts. Subsequent processes include quenching, tempering, blackening, and shot peening, with the blackening process being particularly important. This invention employs a blackening agent composed of water-based epoxy acrylic resin, methylated amino resin, modified silicon carbide, water-based colorant, and other additives to blacken chain components. Utilizing the inherent heat of the chain components during low-temperature tempering, the blackening agent deposits on the surface of the chain components to form a dense black film. This black film improves the appearance of the chain components, isolates them from corrosive environments, and forms a sealed layer. Furthermore, this invention introduces self-made modified silicon carbide into the blackening agent. Through modification, it not only exhibits good dispersibility in the blackening agent but also forms a high-hardness, wear-resistant film on the chain components, imparting excellent wear resistance. After assembly, a high-wear-resistant oil-sealed chain is obtained. Detailed Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. 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 of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0029] Example 1

[0030] A blackening liquid is made through the following steps:

[0031] Prepare the following raw materials by weight: 30 parts water-based epoxy acrylic resin, 3 parts methyl etherified amino resin, 5 parts modified silicon carbide, 2 parts water-based color paste, 0.3 parts corrosion inhibitor, 1 part coupling agent, 1 part leveling agent, 0.2 parts bactericide, and 0.2 parts defoamer. Mix the above raw materials evenly according to the proportions.

[0032] The modified silicon carbide is prepared by the following steps:

[0033] Step A1: Add 100g of SiC powder to 800mL of 1wt% hydrochloric acid solution, mix, stir and react for 4h, centrifuge, precipitate and dry to obtain pretreated SiC powder;

[0034] Step A2: Add 10g of pretreated SiC powder to a three-necked flask containing 150mL of anhydrous ethanol, a thermometer and a reflux device, add 2g of coupling agent KH-560, stir and react at 80℃ for 3h, filter, wash the filter cake with anhydrous ethanol, dry at 80℃ to obtain surface-modified SiC powder.

[0035] Step A3: 10g of surface-modified SiC powder, 100mL of anhydrous ethanol and 2.5g of acrylamide were stirred at 50℃ for 6h. After the reaction was completed, the mixture was filtered, the filter cake was washed with anhydrous ethanol and dried at 80℃ to obtain modified silicon carbide.

[0036] Among them, the waterborne epoxy acrylic resin is GS-330, purchased from Changzhou Guangshu Chemical Technology Co., Ltd.; the amino resin is CYMEL303, purchased from Cytec Chemical Co., Ltd.; the slow-release agent is corrosion inhibitor CP-1000 (purchased from Shanghai Pengpan Trading Co., Ltd.); the color paste is color paste TSEL360W, purchased from Kunshan Shiming Technology Co., Ltd.; the coupling agent is coupling agent NXH-311W, purchased from Nanjing Xuanhao New Material Technology Co., Ltd.; the leveling agent is Tego WET270, purchased from German company Tego; the bactericide is BIT20, purchased from Shanghai Zhenwei Chemical Co., Ltd.; and the defoamer Foamex810 was purchased from German company Tego.

[0037] Example 2

[0038] A blackening liquid is made through the following steps:

[0039] Prepare the following raw materials by weight: 40 parts water-based epoxy acrylic resin, 5 parts methyl etherified amino resin, 8 parts modified silicon carbide, 4 parts water-based color paste, 0.5 parts corrosion inhibitor, 1 part coupling agent, 1 part leveling agent, 0.2 parts bactericide, and 0.2 parts defoamer. Mix the above raw materials evenly according to the proportions.

[0040] The modified silicon carbide is prepared by the following steps:

[0041] Step A1: Add 100g of SiC powder to 1000mL of 1wt% hydrochloric acid solution, mix, stir and react for 5h, centrifuge, precipitate and dry to obtain pretreated SiC powder;

[0042] Step A2: Add 10g of pretreated SiC powder to a three-necked flask containing 150mL of anhydrous ethanol, a thermometer and a reflux device, add 3g of coupling agent KH-560, stir and react at 80℃ for 4h, filter, wash the filter cake with anhydrous ethanol, dry at 80℃ to obtain surface-modified SiC powder.

[0043] Step A3: 10g of surface-modified SiC powder, 120mL of anhydrous ethanol and 3.5g of acrylamide were stirred at 50℃ for 8h. After the reaction was completed, the mixture was filtered, the filter cake was washed with anhydrous ethanol and dried at 80℃ to obtain modified silicon carbide.

[0044] Among them, the waterborne epoxy acrylic resin is GS-330, purchased from Changzhou Guangshu Chemical Technology Co., Ltd.; the amino resin is CYMEL325, purchased from Cytec Chemical Co., Ltd. (USA); the slow-release agent is corrosion inhibitor Halox515 (Shanghai Jinhui Chemical Co., Ltd.); the color paste is SIP3070, purchased from Kunshan Shiming Technology Co., Ltd.; the coupling agent is coupling agent NXH-410, purchased from Nanjing Xuanhao New Material Technology Co., Ltd.; the leveling agent is Tego 655, purchased from German company DIGIC; the bactericide is IPBC30, purchased from Shanghai Zhenwei Chemical Co., Ltd.; and the defoamer Foamex810 was purchased from German company DIGIC.

[0045] Comparative Example 1

[0046] This embodiment provides a blackening solution. Compared with Example 2, the modified silicon carbide in Example 2 is removed, while the remaining raw materials and preparation process are the same as in Example 2.

[0047] Example 3

[0048] A novel manufacturing process for high wear-resistant oil seal chains includes the following steps:

[0049] Step S1: The qualified chain parts are subjected to alkaline washing and acid washing to obtain pre-treated chain parts. The chain parts include inner and outer chain plates, pins, bushings and rollers, all made of 45# steel.

[0050] Step S2: Place the pretreated chain parts in a carburizing furnace, and keep them at 530°C with an ammonia flow rate of 2.0 L / min and a mixed liquid flow rate of 0.2 L / min for 9 hours. The mixed liquid consists of ethanol and carbon disulfide in a volume ratio of 4:1 to obtain the carburized parts.

[0051] Step S3, Quenching and Tempering: Quench the infiltration treated parts in a heat treatment equipment at a quenching temperature of 880℃ for 30 minutes, and then temper them at 220℃ for 60 minutes to obtain intermediate product 1.

[0052] Step S4, Blackening: The intermediate product 1 is kept at 300°C for 1 hour, then placed in the blackening solution of Example 1 for 15 seconds, and then taken out to obtain the intermediate product 2.

[0053] Step S5, shot peening: Steel shot is sprayed onto intermediate product 2 using a shot peening machine. During the shot peening process in step S5, the diameter of the shot is 0.2mm, the compressed air is 0.2MPa, and the angle between the jet and the surface is 30° to improve the surface fatigue strength of intermediate product 2. After that, intermediate product 2 is assembled, and oil seal rings and lubricating oil are installed to obtain a new type of high wear-resistant oil seal chain.

[0054] In step S1, the alkaline washing step is as follows: degreasing in a 10wt% sodium hydroxide aqueous solution at a temperature of 40℃ for 15 minutes, followed by water washing and drying. The acid washing step is as follows: removing rust in a 5wt% hydrochloric acid aqueous solution at a temperature of 40℃ for 15 minutes, followed by water washing and drying.

[0055] Example 4

[0056] A novel manufacturing process for high wear-resistant oil seal chains includes the following steps:

[0057] Step S1: The qualified chain parts are subjected to alkaline washing and acid washing to obtain pre-treated chain parts. The chain parts include inner and outer chain plates, pins, bushings and rollers, all made of 45# steel.

[0058] Step S2: Place the pretreated chain parts in a carburizing furnace and maintain the temperature at 535℃ for 9 hours with an ammonia flow rate of 2.0 L / min and a mixed liquid flow rate of 0.2 L / min. The mixed liquid consists of ethanol and carbon disulfide in a volume ratio of 4:1 to obtain the carburized parts.

[0059] Step S3, Quenching and Tempering: Quench the infiltration treated parts in a heat treatment equipment at a quenching temperature of 890℃ for 20 minutes, and then temper them at 260℃ for 50 minutes to obtain intermediate product 1.

[0060] Step S4, Blackening: The intermediate product 1 is kept at 300°C for 1 hour, then placed in the blackening solution of Example 2 for 20 seconds, and then taken out to obtain intermediate product 2.

[0061] Step S5, shot peening: Steel shot is blasted onto intermediate product 2 using a shot peening machine. During the shot peening process in step S5, the diameter of the shot is 0.5mm, the compressed air is 0.4MPa, and the angle between the jet and the surface is 50° to improve the surface fatigue strength of intermediate product 2. After that, intermediate product 2 is assembled, and oil seal rings and lubricating oil are installed to obtain a new type of high wear-resistant oil seal chain.

[0062] In step S1, the alkaline washing step is as follows: degreasing in a 15wt% sodium hydroxide aqueous solution at a temperature of 60℃ for 10 minutes, followed by water washing and drying. The acid washing step is as follows: removing rust in a 10wt% hydrochloric acid aqueous solution at a temperature of 50℃ for 10 minutes, followed by water washing and drying.

[0063] Example 5

[0064] A novel manufacturing process for high wear-resistant oil seal chains includes the following steps:

[0065] Step S1: The qualified chain parts are subjected to alkaline washing and acid washing to obtain pre-treated chain parts. The chain parts include inner and outer chain plates, pins, bushings and rollers, all made of 45# steel.

[0066] Step S2: Place the pretreated chain parts in a carburizing furnace, and keep them at 540°C with an ammonia flow rate of 2.0 L / min and a mixed liquid flow rate of 0.2 L / min for 9 hours. The mixed liquid consists of ethanol and carbon disulfide in a volume ratio of 4:1 to obtain the carburized parts.

[0067] Step S3, Quenching and Tempering: Quench the infiltration treated parts in a heat treatment equipment at a quenching temperature of 930℃ for 15 minutes, and then temper them at 300℃ for 45 minutes to obtain intermediate product 1.

[0068] Step S4, Blackening: The intermediate product 1 is kept at 300°C for 1 hour, then placed in the blackening solution of Example 1 for 30 seconds, and then taken out to obtain the intermediate product 2.

[0069] Step S5, shot peening: Steel shot is sprayed onto intermediate product 2 using a shot peening machine. During the shot peening process in step S5, the diameter of the shot is 2.5mm, the compressed air is 0.6MPa, and the angle between the jet and the surface is 90° to improve the surface fatigue strength of intermediate product 2. After that, intermediate product 2 is assembled, and oil seal rings and lubricating oil are installed to obtain a new type of high wear-resistant oil seal chain.

[0070] In step S1, the alkaline washing step is as follows: degreasing in a 25wt% sodium hydroxide aqueous solution at 80℃ for 5 minutes, followed by water washing and drying. The acid washing step is as follows: removing rust in a 20wt% hydrochloric acid aqueous solution at 60℃ for 5 minutes, followed by water washing and drying.

[0071] Comparative Example 2

[0072] Compared with Example 3, the blackening solution in Example 3 was replaced with the substance in Comparative Example 1, while the other raw materials and preparation process were the same as in Example 3.

[0073] The performance of the oil seal chains obtained in Examples 3-5 and Comparative Example 2 was tested, and the test process is as follows:

[0074] (1) Corrosion resistance: Neutral salt spray test was conducted in accordance with the national standard GB / T 10125-2012. This method is also applicable to parts that have been soaked in oil or painted. All reagents used were chemically pure sodium chloride dissolved in distilled water or deionized water with a conductivity of no more than 20 uS / cm at a temperature of 25℃±2℃. The solution was prepared with a solubility of 50g / L±5g / L and a density of 1.029-1.036 at 25℃. The pH was adjusted to 6.5-7.2 with hydrochloric acid and sodium hydroxide. The surface corrosion of each group of samples was observed after 12 hours.

[0075] (2) Wear resistance: The wear test was conducted on an MPX-2000 disc pin type wear tester. The test load for the friction pair was dry grinding (load 50N). The rotation speed during the test was 1102r / min. After 10 hours of wear, the wear mass was weighed using an analytical balance (accuracy 0.1mg).

[0076] The results are shown in Table 1:

[0077] Table 1

[0078] project Example 4 Example 5 Example 6 Comparative Example 2 Corrosion resistance No rust No rust No rust Rust Wear mass (g) 0.01 0.008 0.005 0.1

[0079] As can be seen from Table 1, compared with Comparative Example 2, the oil seal chains obtained in Examples 4, 5 and 6 have better corrosion resistance and wear resistance.

[0080] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0081] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A process for the production of a new high wear resistant oil seal chain, characterized by, Includes the following steps: Step S1: Alkali washing and acid washing are performed on qualified chain parts to obtain pre-treated chain parts; Step S2: Place the pretreated chain parts in a carburizing furnace and maintain the temperature at 530-540℃ with an ammonia flow rate of 2.0L / min and a mixed liquid flow rate of 0.2L / min for 9 hours to obtain carburized parts. Step S3, Quenching and Tempering: Quench the infiltration treated parts in a heat treatment equipment at a quenching temperature of 880-930℃ for 15-30 min, and then temper them at a temperature of 220-300℃ for 45-60 min to obtain intermediate product 1. Step S4, Blackening: Incubate intermediate product 1 at 300℃ for 1 hour, then place it in blackening solution for 15-30 seconds, remove it, and obtain intermediate product 2; Step S5, shot peening: Use a shot peening machine to spray steel shot onto intermediate product 2, then assemble intermediate product 2, install oil seal rubber ring and lubricating oil to obtain a new type of high wear-resistant oil seal chain. Blackening solution is made through the following steps: Prepare the following raw materials by weight: 30-40 parts water-based epoxy acrylic resin, 3-5 parts methyl etherified amino resin, 5-8 parts modified silicon carbide, 2-4 parts water-based color paste, 0.3-0.5 parts corrosion inhibitor, 1 part coupling agent, 1 part leveling agent, 0.2 parts bactericide, and 0.2 parts defoamer. Mix the above raw materials evenly according to the proportion to obtain the blackening solution. Modified silicon carbide is prepared through the following steps: Step A1: Add SiC powder to 1wt% hydrochloric acid solution and mix. Stir and react for 4-5 hours. Centrifuge, precipitate and dry to obtain pretreated SiC powder. Step A2: Add the pretreated SiC powder to a three-necked flask containing anhydrous ethanol, add coupling agent KH-560, stir and react at 80℃ for 3-4 hours, filter, wash the filter cake with anhydrous ethanol, and dry at 80℃ to obtain surface-modified SiC powder. Step A3: Surface-modified SiC powder, anhydrous ethanol and acrylamide are stirred and reacted at 50°C for 6-8 hours. After the reaction is completed, the mixture is filtered, the filter cake is washed with anhydrous ethanol and dried at 80°C to obtain modified silicon carbide. In step S2, the mixed liquid consists of ethanol and carbon disulfide in a volume ratio of 4:

1.

2. A process for producing a novel high wear resistant oil seal chain as claimed in claim 1, wherein, The chain components in step S1 include inner and outer chain plates, pins, bushings, and rollers, all made of 45# steel and / or A3 steel.

3. A process for producing a new high wear resistant oil seal chain as claimed in claim 1, wherein, In step S5, during shot peening, the shot diameter is 0.2-2.5 mm, the compressed air pressure is 0.2-0.6 MPa, and the angle between the jet and the surface is 30-90°.

4. A process for producing a new high wear resistant oil seal chain as claimed in claim 1, wherein, In step A1, the ratio of SiC powder to 1wt% hydrochloric acid solution is 100g: 800-1000mL.

5. A process for producing a new high wear resistant oil seal chain as claimed in claim 1, wherein, In step A2, the ratio of the amount of pretreated SiC powder, anhydrous ethanol and coupling agent KH-560 is 10g:150mL:2-3g.

6. A process for producing a new high wear resistant oil seal chain as claimed in claim 1, wherein, In step A3, the ratio of modified SiC powder, anhydrous ethanol, and acrylamide is 10g: 100-120mL: 2.5-3.5g.