Advantages of Thermal Spray Technology

       ①Due to the wide temperature range of thermal spraying heat sources, the coating materials that can be sprayed include almost all solid engineering materials, such as metals, alloys, ceramics, cermets, plastics, non-metallic minerals and their composites, etc. Thermal spraying can endow the substrate with various functions (such as wear resistance, friction reduction, corrosion resistance, high temperature resistance, oxidation resistance, insulation, electrical conductivity, catalysis, radiation, radiation protection, anti-interference, superconductivity, amorphous state, heat insulation, surfaces that are biocompatible, IR absorbing, etc.).

    ② During the spraying process, the surface of the substrate is heated to a small extent and can be controlled, so it can be sprayed on various materials, either metal or non-metal (such as ceramics, glass, cloth, paper, plastic, etc.), and It has little effect on the structure and properties of the substrate, and the deformation of the workpiece is small.

    ③The thermal spraying process is flexible and adaptable, and is not limited by the size of the workpiece. It can not only spray human-shaped structural parts such as iron towers and steel bridges, but also small precision parts; it can be carried out between the spraying parts, and it can be applied in the field. And most thermal spraying production efficiency is high, generally up to several kilograms per hour, and some methods even reach tens of kilograms.

    ④ Thermal spraying can not only protect and strengthen the surface of the material. It can also repair the waste parts, and the time is short, the effect is good, and it can have higher performance and service life than the new parts.

    ⑤The thermal spraying operation has fewer procedures, shorter construction time and higher efficiency. relatively economical. For example, when chrome plating on aluminum alloy substrates, degreasing, corrosion, zincate and other treatments are required, copper impact plating, and sometimes nickel plating and other pretreatments are required, while thermal spraying requires only degreasing and Sandblasting, another example, when plating hard chrome, the application speed is 0.0023mm/(h m2), while the application speed of several materials that can replace hard chrome plating by plasma spraying method is 0.14-0.58mm/(h m2) m2).

    ⑥ The size range of the parts to be sprayed is wide, which can be sprayed on a large area or a local spray on large components. The coating thickness can be changed in a wide range, the coating thickness can be from tens of microns to several millimeters, the surface is smooth, and the processing amount is small. When spraying with extra fine powder, it can be used without grinding. In contrast, electroplating and hot dip are limited by the capacity of plating tanks, heating equipment, etc. Therefore, thermal spraying of large parts is not only convenient, but also more economical.

    ⑦ The properties of the base metal do not change. In addition to the flame spray melting process, the heating temperature of the base metal during coating construction is low, the performance of the base metal does not change, and the deformation of the workpiece is small. Therefore thermal spraying is also called "cold process". For example, the heating degree of oxygen-acetylene flame spraying, plasma spraying or explosive spraying workpiece does not exceed 2500 ℃, the workpiece will not be distorted, and the metallographic structure of the workpiece will not be changed.

    ⑧ It can endow common materials with special surface properties. For example, the ductile residual material can be compounded with plastic or hard and brittle ceramic material to form a surface Alloy material.

    ⑨On the premise of meeting the strength requirements, common materials can be used for the base of the workpiece instead of precious materials, and only high-quality materials are used for the coating, so that "good steel is used on the blade".