High-temperature-resistant oxidized nano-composite coating applied to hot stamping parts and processing method thereof

Abstract

The invention belongs to the technical field of hot stamping forming and particularly relates to a high-temperature-resistant oxidized nano-composite coating applied to hot stamping parts and a processing method thereof. The coating is prepared from the following raw materials: polyphenylene sulfide, sodium yttrium fluoride nano-particles, 8-hydroxyquinoline, cobalt sesquioxide, 2,6-dimethyl pyridine, pearl mother powder, polycarbosilane, ethyl alcohol and deionized water. Compared with the prior art, the high-temperature-resistant oxidized nano-composite coating has the following advantages: the pearl mother powder, cobalt sesquioxide and the sodium yttrium fluoride nano-particles are added into the coating and cooperate with each other; through combination of the coating and a plasma spraying process, the peeling strength of the coating can be improved; meanwhile, the sodium yttrium fluoride nano-particles and polyphenylene sulfide achieve synergistic action, so that the coating has higher heat stability and impact resistance; the coating is covered at twice and is cured, stacked and cross-linked layer by layer, so that the coating is uniform in inside and outside; the mechanical strength is improved; the formed surface is smooth; the coating is free of shedding after the coating is formed and quenched; the coating is high in conductivity; the service life of the coating is prolonged.

Description

technical field [0001] The invention belongs to the technical field of hot stamping forming, and in particular relates to a high-temperature oxidation-resistant nanocomposite coating for hot stamping parts and a processing method thereof. Background technique [0002] Hot stamping is a technology specially used to manufacture ultra-high-strength steel stamping parts. The parts made by this method have ultra-high strength and good dimensional accuracy. They are widely used in the field of automobile manufacturing and can improve the safety of automobile collisions. , lighten the body, meet the requirements of energy saving and environmental protection, and have received widespread attention in recent years. The oxidation of high-temperature plates is a problem that plagues hot stamping technology. Although the plates are heated in a gas-protected atmosphere, they are transferred from the heating furnace During the process of thermoforming the mold, a layer of oxide skin will ...

AI Technical Summary

Problems solved by technology

[0002] Hot stamping is a technology specially used to manufacture ultra-high-strength steel stamping parts. The parts made by this method have ultra-high strength and good dimensional accuracy. They are widely used in the field of automobile manufacturing and can improve the safety of automobile collisions. , lighten the body, meet the requirements of energy saving and environmental protection, and have received widespread attention in recent years. The oxidation of high-temperature plates is a problem that plagues hot stamping technology. Although the plates are heated in a gas-protected atmosphere, they are transferred from the heating furnace During the process of thermoforming the mold, a layer of oxide skin will be formed on the contact surface of the plate and air at high temperature. The oxide skin is easy to fall off during stamping and adheres to the surface of the mold. It must be removed in time, otherwise it will affect the continuity of production. The scale attached to the surface of the formed part must be removed by shot blasting before spraying and other treatments to improve the corrosion resistance of the part due to the poor bonding of the part matrix, which increases the production cost and prolongs the production cycle. The hardness of the scale is high, which may scratch the surface of the mold; at present, the method of coating a protective layer on the surface of the plate can be applied to the direct hot stamping forming process to produce parts with relatively simple shapes; the coating is to prevent the high temperature oxidation of the plate An economical and effective method, which can avoid the oxidation of steel, and is not limited by the complex shape or size of the formed parts. The process is simple, the operability is strong, the economy is good, and it can avoid the oxidation of steel. High-temperature oxidation-resistant coatings, but in actual use, there will be problems such as poor formability under high temperature conditions, falling off after forming and quenching, or poor electrical conductivity after forming. Therefore, it is necessary to address the above problems for high-strength hot stamping parts. coatings for further research