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Usage of bolt flat washer Usage
1. The function and characteristics of flat mats
Flat gasket, also known as flat gasket or flat gasket, is a type of gasket with the shape of a flat plate, commonly used as a gasket at the connection of fasteners. Its function is to disperse the tightening force of connectors, increase the contact area, and reduce loosening or fatigue damage caused by hydrophobicity, while effectively preventing water, gas, and oil leakage. The material of flat pads is generally metal or rubber, which has the characteristics of withstanding high temperature, high pressure, and wear resistance.
2. Usage scenarios and precautions for products
Flat gaskets are usually used to connect fasteners such as impellers, pipes, elbows, flanges, etc. to ensure tightness and sealing between the connectors. When using, it is necessary to choose the appropriate material and thickness based on the pressure, temperature, and other parameters of the equipment to ensure its normal use.
3. Installation and Tightness Requirements
When using, corresponding installation and usage requirements should be followed, and it should not be too tight or too loose to avoid mechanical damage or loosening, which may cause danger.
In summary: Flat washers and washers are two commonly used gaskets in mechanical component connections, and their different shapes and sizes give them their unique usage scenarios and characteristics. When selecting and using, scientific and reasonable selection and use should be made based on the actual situation.
Surface treatment process process
1. Electro-galvanizing
Electro-galvanizing, also known as cold galvanizing in the industry, is the process of using electrolysis to form a uniform, dense and well-bonded metal or alloy deposition layer on the surface of the workpiece. Compared with other metals, zinc is a relatively inexpensive and easy to coat metal, which is a low-value anti-corrosion electroplating layer, which is widely used to protect steel parts, especially against atmospheric corrosion, and for decoration. Plating technologies include channel plating (or hang plating), barrel plating (for small parts), blue plating, automatic plating, and continuous plating (for wire, strip). Electrogalvanizing is the most commonly used coating for commercial fasteners. It is cheaper and has a better appearance, and can be available in black or army green. However, its anti-corrosion performance is average, and its anti-corrosion performance is the lowest among the zinc plating (coating) layers. Generally, the neutral salt spray test of electrogalvanizing is within 72 hours, and special sealing agents are also used to make the neutral salt spray test reach more than 200 hours, but the price is expensive, which is 5-8 times that of general galvanizing. Fasteners for structural parts generally have color zinc and white zinc, such as 8.8 and other commercial-grade bolts.
2. Chrome plating
Chrome plating is mainly to improve surface hardness, beautiful and rust-proof. Chromium plating has good chemical stability and does not act in alkalis, sulfides, nitric acid and most organic acids, but is soluble in hydrohalic acid (such as hydrochloric acid) and hot sulfuric acid. Because chromium does not change color, it can maintain its reflective ability for a long time when used, and is better than silver and nickel.
3. Nickel plating
Nickel plating is mainly divided into wear-resistant, anti-corrosion, anti-rust, and generally thin process.
Frequently Asked Questions (FAQ)
What is the primary function of a flat washer?
Its primary function is to disperse the tightening force of connectors, increase the contact area, and reduce loosening or fatigue damage caused by hydrophobicity, while effectively preventing water, gas, and oil leakage.
What materials are flat gaskets usually made of?
Flat pads are generally made of metal or rubber, which allows them to withstand high temperature, high pressure, and resist wear.
How should I select and install flat gaskets?
You should select the appropriate material and thickness based on parameters like equipment pressure and temperature. During installation, follow specific requirements to ensure it is not too tight or too loose to prevent mechanical damage or loosening.
What is the difference between electro-galvanizing and other plating options?
Electro-galvanizing (cold galvanizing) is inexpensive and offers a good appearance, but its anti-corrosion performance is relatively low compared to other zinc layers. Chrome plating is used to improve hardness and rust resistance, while nickel plating focuses on wear resistance, anti-corrosion, and anti-rust in a thin process.
Why is chrome plating highly valued for surface treatment?
Chrome plating improves surface hardness and provides excellent chemical stability. It does not react with alkalis, sulfides, nitric acid, and most organic acids, and maintains its reflective ability for a long time without changing color.