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Hot-dip galvanizing, also known as hot dip galvanizing, melts the zinc ingot at high temperatures, puts some auxiliary materials, and then immerses the metal structural member in a galvanizing bath to attach a layer of zinc to the metal member. The advantage of hot-dip galvanizing is that it has strong anti-corrosion ability, and the adhesion and hardness of the galvanized layer are good.
"Cold plating" means "electroplating", that is, the zinc salt solution is electrolyzed, and the plating part is plated. Generally, there is no heating, and the amount of zinc is small, and it is easy to fall off in a humid environment.
Galvanizing is directed to steel grid plates, and manufacturers are strongly advised to use hot-dip galvanizing.
Hot-dip galvanizing is a chemical treatment and belongs to an electrochemical reaction.
Cold galvanizing is a physical treatment, except that a layer of zinc is applied to the surface, so the zinc layer is easy to fall off. Hot-dip galvanizing is often used in construction.
Continuous hot-dip galvanizing process: steel → heating → cooling to galvanizing temperature → galvanizing → cooling
Cold galvanizing is electroplating zinc, only 10-50g/m2, and its corrosion resistance is much worse than hot dip galvanizing. The price of electroplating is relatively cheaper.
Hot-dip galvanizing is the galvanization of the surface of the steel body under hot-dip conditions. Its adhesion is very strong and it is not easy to fall off. Although the hot-dip galvanized pipe also has rust phenomenon, it can meet the technology and hygiene in a long period. Claim.
1.cylindrical milling cutter
Used for processing flat surfaces on horizontal milling machines. Cutter teeth are distributed on the circumference of the milling cutter, and are divided into straight teeth and spiral teeth according to tooth shape. According to the number of teeth and coarse teeth and two kinds of fine teeth. The helical tooth rough tooth milling cutter has fewer teeth, high tooth strength and large chip space, which is suitable for rough machining. Fine-tooth milling cutters are suitable for finishing.
2. face milling cutter
Also known as disc milling cutter, used for vertical milling machine, end milling machine or gantry milling machine processing plane, end face and circumference have cutter teeth, also have coarse teeth and fine teeth. The structure has three kinds: integral type, insert type and transferable type.
3. End milling cutter
Used for processing grooves and step surface, knife teeth in the circumference and end face, can not work along the axial feed. When the end mill has end teeth through the center, axial feed can be provided.
4. Three-side edge milling cutter
Used for processing all kinds of grooves and steps, its two sides and circumference are provided with cutter teeth.
5. Angle milling cutter
For milling grooves at a certain Angle, there are two kinds of single Angle and double Angle milling cutters.
6.Saw Blade milling cutter
Used for machining deep grooves and cutting off workpieces, there are more cutter teeth on the circumference. In order to reduce the friction during milling, there are 15 '~1° auxiliary Angle on both sides of the cutter teeth. In addition, there are keyway milling cutters, dovetail slot milling cutters, T - shaped slot milling cutters and various forms of milling cutters.
End Mill,Roughing End Mill,Carbide Square Drill Bit,Coating Machine Tools
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