The surface heat treatment is generally a metal heat treatment process that changes the surface properties by heating and cooling the surface of the steel. The improvement of the performance of the material is inseparable from the heat treatment. The solution treatment in the surface heat treatment is one of the most important steps. Only by knowing more about the solution treatment of surface heat treatment can we better apply it. This article will bring you to understand.
The surface heat treatment generally has a heating temperature of 780-820 ° C for solution treatment and 760-780 ° C for the material used as the elastic component, mainly to prevent grain coarseness from affecting strength. The temperature uniformity of the solution treatment furnace should be strictly controlled at ±5 °C. The holding time can be generally calculated as 1 hour / 25 mm, and when the beryllium bronze is subjected to solution heat treatment in air or an oxidizing atmosphere, an oxide film is formed on the surface. Although it has little effect on the mechanical properties after aging strengthening, it will affect the service life of the tool during cold working.
In order to avoid oxidation, it should be heated in a vacuum furnace or ammonia decomposition, an inert gas, or a reducing atmosphere to obtain a bright surface heat treatment effect. In addition, care should be taken to minimize the transfer time, otherwise it will affect the heat treatment effect after aging. Thin materials should not exceed 3 seconds, and general parts should not exceed 5 seconds. Quenching media generally use water. Of course, parts with complex shapes can also be used to avoid deformation.
Surface heat treatment has been widely used in various industries with the development and progress of the times. The aging temperature of surface heat treatment is related to solution treatment.
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