Threaded Studs Comprehensive protection
The six characteristics of hot-dip galvanized fastener are briefly described
Hot galvanizing is mainly for fasteners in the product manufacturing a kind of surface treatment technology, the hot dip galvanized fasteners common types are: electric galvanized, powder zinc impregnation, mechanical galvanized and hot dip galvanized. In daily life, it is mainly based on the different requirements of customers to different hot galvanizing surface treatment.
The main features of hot-dip galvanized fastener are:
1. Good reliability: the zinc coating and steel are metallurgical and a part of the steel surface, so the durability of the coating is reliable.
Comprehensive protection: every part of the plate can be plated with zinc, even in the hollow, sharp corners and hiding places.
3. Low cost: the cost of hot dip galvanizing is lower than that of other paint coatings;
4. Saving time and effort: the process of galvanizing is faster than other coating construction methods, and it can avoid the time required to be painted on the site after installation.
Durable and durable: under the enviroment, the standard hot galvanized anti-rust thickness can be maintained for more than 50 years without repair. In urban or offshore areas, the standard hot-dip galvanizing coating can be kept for 20 years without repair;
6. The coating has a strong toughness: the galvanizing layer forms a special metallurgical structure that can withstand mechanical damage when transported and used. For more specific: high strength bolt connection is simple in construction, mechanical performance is good, removable, fatigue resistance, as well as the advantages of under dynamic load is not loose, is a promising method of connection. The high-strength bolt is made of a special wrench to tighten the nut, causing the bolt to produce a large and controlled pretension, and the same amount of prepressure is generated for the connected parts through the nuts and pads. Under the effect of preloading, along by fitting the friction surface can produce larger, apparently, as long as the axial force is less than the friction force, component will not slip, connection would not be damaged, this is the principle of high strength bolt connection. High strength bolt connection is established by fitting the friction between the contact surface to prevent slip of each other, to make the contact there is enough friction, we must improve the artifacts of clamping force and friction coefficient increase component interface. The clamping force between the members is achieved by applying the pretension to the bolt, so the bolts must be made of high-strength steel, which is what is called a high-strength bolt connection. In high strength bolt connections, the magnitude of friction coefficient has great influence on bearing capacity. The test shows that the friction coefficient is mainly affected by the form and material of the contact surface. In order to increase the friction coefficient of the contact surface, it is often used to process the contact surface of the components in the connection area by using sand blasting and brushing with wire brush. High strength bolts actually have two types: friction and pressure. The criterion of shear strength of the friction type high strength bolt is that the shear force caused by the design load is no more than the friction force. The pressure type high-strength bolts are designed by not being sheared or not crushed by the bar.