What is a high-grade steel nut?
What is a high-grade steel nut?
High-grade steel nuts are mainly reflected in their technical requirements, and thickened nuts are generally used.
High-strength nuts are made of high-strength steel, or nuts that require a relatively large force to lock can be called high-strength nuts. They are used in the connection of bridges and rails or in the connection of some high-pressure and ultra-high-pressure equipment. A lot of high-strength nuts are used.
High-grade steel nuts
Are high-grade steel nuts safe for equipment?
The fracture mode of high-grade steel nuts is generally a brittle fracture. Generally, when installing high-pressure equipment, to ensure the sealing of the container, a large prestress is required.
Using high-strength steel nuts Today, many power generation equipment and vehicles such as aircraft, cars, trains, and ships are developing rapidly.
Therefore, locking components like our nuts also need to follow the trend and develop rapidly to keep up with the pace of development.
High-strength bolts are mainly used for the connection of some important mechanical equipment, especially repeated disassembly and assembly and various assembly methods that place extremely high requirements on nuts.
High strength steel nut
Surface finish of high-strength steel nuts
The surface condition and accuracy of the threads will affect the use and safety of the equipment. Usually in order to adjust the friction coefficient and prevent rust and sticking during use, we generally require the surface to be plated with a layer of nickel and phosphorus.
The coating thickness is generally controlled within the range of 0.02~0.03mm, and the coating should be uniform, dense, and free of pinholes.
The nickel-phosphorus plating process for high-strength nuts consists of three parts.
The first is pre-plating treatment, which mainly includes precision and appearance inspection of high-strength nuts before plating to see if there are cracks or defects. Oil stains can be removed manually, or by soaking or pickling, and then the nuts are activated with electricity. , rapid nickel plating;
Then the electroless nickel plating process is carried out, and a series of chemical methods are used to plate nickel on the nut;
The last step is the post-processing process, which generally includes hydrogen heat removal, polishing, and finished product inspection.
High grade steel nuts
Some points that should be paid attention to in high-strength nuts
Some issues need to be paid attention to when using high-strength nuts. Firstly, the quality needs to be paid attention to and surface cleaning needs to be thorough. Secondly, the friction coefficient must meet the technical requirements. The installation needs to be carried out in an anhydrous state and timely maintenance and correction must be paid attention to.
Standard high-strength nuts The use of high-strength nuts has gradually been widely used, generally including two strength levels: grade 8 nuts and grade 10 nuts, of which grade 10 nuts are the most common.
High-strength nuts transmit external force through friction and applied force. High-strength nuts are more practical than ordinary nuts. With the advancement of technology and life, the application of high-strength nuts has gradually become more and more widespread. Now it is in the industry Application and status are irreplaceable.
