What are the effects of heat treatment on high strength bolts

High strength bolt is the most typical high strength fastener. High strength bolts are made of high-strength steel or bolts that require greater preload. High strength bolts are mainly used to connect bridges, railways, high-pressure and ultra-high-pressure equipment. The fracture of the bolt is brittle. In order to ensure the tightness of the vessel, it is necessary to pre stress the high strength bolts used in ultra-high pressure equipment. Today, we use high strength bolt as an example to describe the heat treatment of high strength fasteners.
In the 1990s, continuous heat treatment production line has been in a leading position. It is especially suitable for heat treatment and tempering of small and medium sized fasteners
High strength bolts must be quenched according to relevant technical requirements. Quenching heat treatment is to improve the mechanical properties of fasteners, so as to meet the requirements of tensile strength greater than the predetermined value and product qualification rate.

Heat treatment process has a crucial impact on the internal quality of high strength fasteners. Therefore, in order to produce high quality and high strength fasteners, it is necessary to have advanced heat treatment technology and equipment. Due to the mass production of high strength bolts, low price, fine thread and precise structure, the heat treatment equipment must have large production capacity and high automation.
The quality of heat treatment is good. The cleaning, heating, quenching, cleaning, tempering, decoloration and coloring of the high strength fasteners are automatically controlled, which effectively ensures the quality of heat treatment. Threaded fasteners may cause decarburization. When they do not meet the mechanical performance requirements, they will trip first, which will lead to the failure of threaded fasteners and shorten their service life. Due to the decarburization of raw materials, the decarburization layer of raw materials will be deepened if the annealing is improper. In the process of heat treatment and tempering heat treatment, some oxidation gas is usually introduced from outside the furnace.
The company's main business: high strength bolt, high strength nut, steel structure bolt, steel structure nut, grid sealing plate, grid bolt, etc.