How is
spring spring manufacturers of heat treatment and maintenance?
Spring protection coating used in heat treatment when heated, heat treatment workpiece protective artifacts and make it not happen oxidation and decarburization.
Heat protection coating general technical requirements in JB/T5072 -
1991 specified in the standard: heat treatment protection coatings on stainless steel, high temperature alloy and titanium alloy has the ability of resistance of alloy elements and as dilution;
For structural steel, die steel has certain ability of preventing decarbonization.
Protection coating should be able to meet the total decarburization layer depth is less than or equal to zero.
075 mm, viscosity of 25 ~ 65 s, the fineness of raw material is not more than 45 um, no agglomerate, and has good wettability, so that the spray and brush.
Uniform coating should be complete, no tumor mark, good adhesion performance, 2 h at room temperature in dry or in 60 ~ 100 degrees temperature range dry within 30 minutes to complete.
Flake coating should have good performance, after quenching water-cooling, area of more than 90% of the coating should be able to fall off on their own;
After oil cooling, more than 80% of the coating should be able to fall off, the residual coating should be easy to remove, peeling coating should not be polluted quenching medium.
In addition, the coating composition cannot contain damage or pollution elements, metal parts should not release harmful gases, or in the process of heating.
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