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Decarburization in Heat Treatment of Hot-dip Galvanized Hexagon Bolts

Jan 26, 2022 View: 836

The process of processing and manufacturing hot-dip galvanized hexagon bolts is complicated. After multiple processes, the hot-dip galvanized hexagon bolts of each process can be strictly regarded as the basic standard. In order to meet the specifications of the actual pre-designed scheme, a large number of strict inspections are required, and effective warehousing logistics, transportation and proper installation are required. Finally, the true effect of a hot-dip galvanized hexagon bolt can be fully exerted. In order to improve the standard parts The comprehensive physical properties of hot-dip galvanized hexagon bolts have a process, that is, heat treatment process. This process has a very important influence on the essential quality of hot-dip galvanized hexagon bolts and other standard parts, especially hot-dip galvanized hexagon bolts.

With the development trend of the times, the continuous heat treatment production line with maintenance function after the 1990s has already dominated. In addition to the excellent sealing performance of the furnace, the temperature of the heat treatment line and the selection of main process parameters are very accurate, and the computer operation is very accurate, and the functions of mechanical fault alarm and display information are also readily available. During the whole process of quenching and tempering heat treatment, some air oxidation steam will be generated outside the furnace. According to a series of chemical reactions and the rust reaction on the surface of the hot-dip galvanized hexagon bolt, the decarburization of the hot-dip galvanized hexagon bolt material will be promoted.

According to scientific research by professional technicians, the decarburization level of medium carbon aluminum alloy steel is more serious than that of carbon steel, and the decarburization temperature is between 700-800 degrees Celsius. The key is that the blocks attached to the surface of the stainless steel wire break down chemicals very quickly under certain standards. If the furnace gas operation of the continuous mesh belt furnace is not good, it will lead to the decarburization deviation of the bolt. When the hot-dip galvanized hexagon bolt adopts the cold heading forming process, the decarburized layer of the initial raw material quenching not only still exists, but also is extruded to the hot-dip galvanizing process. Top of zinc hex bolt male thread. At this time, the surface of the hot-dip galvanized hexagon bolt that must be heat treated has lost the strength requirements of the pre-designed plan, and the physical properties of the high-toughness hexagon bolt will be greatly reduced.

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