It is necessary to prevent the breakage of the outer hexagonal galvanized bolts

Bolt may be a kind of product that looks very inconspicuous, the style is not good-looking, and the color is not good-looking, but hexagonal galvanized bolts are indeed something that is used in most fields. However, there will be a problem that cannot be ignored in the whole process of using standard bolts, that is, the breakage of bolts will cause a lot of inconvenience and even safety hazards. In order to effectively prevent and prevent the fracture of hexagonal galvanized bolts, the following countermeasures can be adopted during the heat treatment process and galvanizing process. Today we are committed to mastering the heat treatment method of hexagonal galvanized bolts, which is also an important factor affecting its fracture. (1) Under the condition of ensuring the main parameters of the heat treatment process, select the appropriate tempering temperature to remove the internal stress and thermal stress of the mechanism to the greatest extent. In the absence of a continuous heat treatment electric furnace, select a scientific and reasonable reading method based on the output of the bolts to ensure that each bolt is fully tempered. (2) Before quenching, the salt bath furnace should be deaminated and slag removed to avoid air oxidation and carburization of the surface of the component. After quenching, the strength test should be carefully carried out, and the false hardness caused by surface carburization should be paid close attention to. It is better to adjust the intensity value at the technical limit. (3) Before quenching, be sure to carefully clean up the oil stains and rust adhered to the surface of the parts, so as to avoid the surface of the parts from being sintered into oil stains, carbon black and scale after quenching and tempering. After quenching, the bolts should be carefully cleaned to avoid corrosion of the base material caused by CSP residues on the bolts. Hexagonal galvanized bolts are very common and very important products. It is required that our manufacturers must strictly implement his national standards to produce and produce accurate, high-quality products for market demand.