1. Warm congratulations to Harbin peize material technology co., LTD. On successfully staying in binxi economic development zone!
2. Warmly celebrate the successful website construction of Harbin pei-ze material technology co., LTD.
Definition of thermal spraying:
Thermal spraying is a process in which the spraying material is heated to the melting or semi-melting state by the heat source, atomized by the heat source's own power or the external compressed air stream, or pushed into the molten particles into the spray particle beam, and sprayed onto the surface of the pretreated workpiece at a certain speed to form the coating.
Characteristics of thermal spraying:
Thermal spraying technology has two prominent features: one is that the composition of spraying powder is not limited, can be choose according to special requirements;The second is the process of thermal spraying workpiece temperature can be controlled, thus reducing deformation oxidation and phase change, so that the performance of the material itself is not damaged or lost, these characteristics and thermal spraying coating has heat resistance, corrosion resistance, wear resistance, oxidation resistance, insulation, heat insulation and other special functions, thermal spraying technology has been rapidly developed.Should consider when choosing a coating technology economy and technical performance of the coating technology, in the whole system considering the surface coating or other surface modification and processing methods, to know the function of the surface requirements and service environment, base material (alloy, heat treatment, etc.) on the surface of the processing performance, must consider the coating's own technical problems and economy, the service life of coating and advantages, rather than just the production cost of coating.
Application method of thermal spraying:
According to the heat source used in thermal spraying and spraying material state difference.Arc spraying is a method of forming an arc between two metal wires which are connected to the positive pole and the negative pole of the power source respectively and continuously fed. The heated molten part is atomized by compressed air jet and sprayed onto the substrate to form a coating.Since this method is only suitable for spraying wire, it is also called arc wire spraying.
1. Features :(1) the spraying material must be conductive.
(2) the arc temperature is lower than the plasma temperature, but higher than the oxygen acetylene flame temperature.The compressed air pressure of atomized wire can be high, so the spraying layer is relatively dense.
(3) the spraying efficiency is high because two metal wires are sent in at the same time.
2, use: is suitable for large axial, roller coating and a long-lasting protection for large structure.
Thermal spraying is how to heat materials:
1. Thermal spraying is a method of atomizing, spraying and depositing melted or nearly melted particles onto the substrate surface to form a special surface layer by heating the spraying material with a heat source.At present, there are three main heat sources for spraying.One is arc heat source, two is plasma flame heat source, and three is natural gas heat source.The thermal spraying methods can be divided into arc spraying, plasma spraying and flame spraying.
2. Spray welding (or spray welding) is a method that USES a heat source to heat the material, spray it on the surface of the substrate, and then melt it on the surface of the substrate to form a special surface layer.At present, oxyacetylene flame is the main heat source used in spray welding.
