What are the specific requirements for the treatment of high strength blackened bolts? Degreasing, derusting and cleaning shall be carried out for high strength blackened bolts before treatment. Incomplete cleaning will affect the blackening effect. It is recommended to use hydrochloric acid of more than 15% concentration for pickling. The treatment of high strength blackened [...]
Advantages of hot dip galvanized hexagon bolts: Low treatment cost: the cost of hot dip galvanizing antirust is lower than that of other coatings; Durable: in suburban environment, the standard thickness of hot-dip galvanizing antirust can be maintained for more than 50 years without repair; Hot dip galvanized bolt is also called hot-dip galvanizing and [...]
Featurers of high strength hot dip galvanized bolts High strength hot dip galvanized bolt is a typical anodic coating, which is mainly used to improve the corrosion resistance of the substrate. Because of its thin coating thickness, it is mainly used for surface anti-corrosion protection under general environmental conditions. After chromate passivation treatment, the corrosion [...]
Specification introduction of outer hexagon bolts Outer hexagon bolts thread M8 × 1～M64 × 4. Hexagon head bolts with fine thread, full thread, performance grade 5.6, 8.8, 10.9, A2-70, a4-70, a2-50, a4-50, Cu2, cu3 and AL4, product grade A and B. Mark example: 1. Thread size d = M12 × 1.5, nominal length L = [...]
Application advantages of high strength hot dip galvanized bolt High strength hot-dip galvanized bolts are widely used. Compared with other paint coatings, the cost of hot-dip galvanized bolts is very low, but they can also play the role of rust prevention and corrosion prevention, so they are welcomed by manufacturers and enterprises. Application advantages of [...]
How to clean high strength galvanized bolts? Generally, when high strength galvanized bolts are cutting and cold heading, there will be cooling oil on the outer surface of the fasteners, and there will be residual oil on the outer surface of the fasteners after quenching in the heat treatment oil, which will be attached on [...]
Characteristics of high strength bolts High strength bolts are made of high strength steel, or bolts that need to be applied with large preload, which can be called high strength bolts. High strength bolts are mostly used to connect bridges, rails, high pressure and ultra-high pressure equipment. The fracture of this kind of bolt is [...]
Application of stainless steel outer hexagon bolt Stainless steel outer hexagon bolt stainless steel usually refers to the steel which has the corrosion resistance to air, water, acid, alkali salt or other media. According to the different composition of the alloy, the stainless and acid resistance are emphasized respectively. Although some steels have rust resistance, [...]
Today, We will introduce the classification of high strength bolts. According to the stress state, high strength bolts can be divided into friction type and pressure bearing type. In fact, there are differences in design and calculation methods. The ultimate bearing capacity of friction type high-strength bolts is the sliding between plates; The bearing capacity [...]
Treatment technology of Dacromet hexagon bolt Dacromet is a kind of inorganic conversion film containing zinc, aluminum and chromium, which is directly immersed in Dacromet treatment solution without electrodeposition, or adhered to the surface of workpiece by brush coating and electrostatic spraying, and then sintered. Dacromet hexagon bolt refers to the Dacromet plating on the [...]
Technology of Hot Dip Galvanized Bolts Hot dip galvanized bolts are special bolts product produced by hot galvanizing treatment, which is widely used in industrial infrastructure construction and machining. Hot dip galvanized hexagon bolt production process: Hot dip galvanized hexagon bolt, also known as hot dip galvanized hexagon bolt, is a method of immersing the [...]
Material of High Strength Stud Bolt High strength stud bolt is used for mechanical fixed link function. Both ends of the stud bolt have threads, and the screw in the middle has thick and thin ones. It is called straight rod or shrinking rod, also called double head screw. Material of high strength stud bolt: [...]
High Strength Blackened Bolt Blackening process is blackening during tempering in heat treatment process. Different blackening process will directly affect the quality of screws. Attention should be paid to the following problems in the treatment process of high strength blackened bolt: Acid and alkali substances are strictly prohibited, which will damage the film-forming function of [...]
Material and application of high strength stud bolt High strength stud bolt is used for mechanical fixed link function. Both ends of the stud bolt have threads, and the screw in the middle has thick and thin ones. It is called straight rod or shrinking rod, also called double head screw. Material of high strength [...]
Advantages and applications of high strength hot dip galvanized bolt The high-strength galvanized bolt is a method of immersing the bolt into the pre heated and melted zinc plating bath to form a layer of zinc coating on the surface of the workpiece after degreasing and derusting. High strength hot-dip galvanized bolt connection has the [...]
Appearance requirements for blackening of high strength bolts: 1. The appearance of blackening treatment is blue black or dark black. 2. The film crystallizes compactly and evenly, and the product has no bottom exposure, obvious color difference, whitening and other abnormal phenomena. If the blackening treatment of high strength blackened bolt is abnormal, the following [...]
Anti loosing method of outer hexagon bolt 1、 Permanent anti loosing method Spot welding, riveting, bonding, etc. This method mostly needs to crush the threaded fasteners during disassembly, which can not be reused. 2、 Friction anti loosing method This is one of the most widely used anti loosing methods. In this method, a positive pressure [...]
Anti rust treatment method of Dacromet hexagon bolt: 1. Rust removal: The derusting process in Dacromet bolt treatment is different from the general pre-treatment method of coating, and acid pickling is used for derusting. This is because most of the parts treated by Dacromet are high-strength bolts, nuts and high-strength stamping parts, which will produce [...]
The processing technology of blackened hexagon bolt is divided into three kinds: low temperature blackening, high temperature blackening and optical extinction blackening. 1. Low temperature blackening The product quality of low temperature blackening process of hexagon bolt is better than that of the same industry, the blackening film of the processed workpiece is firm, the [...]
Application of hot dip galvanized hexagon bolts There are quite a lot of bolts types. Some bolts may only be used in special places, such as hot dip galvanized hexagon bolts are generally suitable for outdoor use. The most used places are bridge barriers, power facilities, power grid structure, etc. of course, the type and [...]