Brass machining material is one of the most common metals in our lives. In this article, we will discuss the application of brass, workability, surface finish and brass machining parts skills.
Characteristics of brass machined parts
1. Brass has strong wear resistance
2. High strength, high hardness, strong chemical resistance (special brass)
3. Easy to process
4. Low cost.
Types and applications of brass machining parts
Conventional brass applications: ordinary brass has a wide range of uses, such as water tank belts, water supply and drainage pipes, medals, bellows, serpentine tubes, condenser tubes, bullet casings and various complex shaped punching products, small hardware parts, etc. As the zinc content increases from H63 to H59, they can withstand hot processing well, and are mostly used in various parts of machinery and electrical appliances, stamping parts and musical instruments.
Application of H65 brass: H65 brass has sufficient mechanical properties and process properties, good cold and hot pressure performance, golden color, and is mostly used in various hardware products, lighting, pipe fittings, zippers, plaques, rivets, springs, and settlement filters Wait.
Application of H68 brass: It has good plasticity and high strength, good machinability, easy welding, corrosion resistance, and good cold and hot workability. Generally used in various cold-drawn parts and deep-drawn parts, radiator shells, bellows, waveguides, doors, lamps, etc.
Uses of H70 brass: It can be used for various deep-drawn and bending-manufactured stressed parts, such as radiator shells, ducts, bellows, bullet shells, gaskets, etc. It has good mechanical properties, good plasticity in hot state, acceptable plasticity in cold state, good machinability, easy fiber welding and welding, and corrosion resistance. It is a widely used brass variety.
Application of nickel brass: The tensile strength of nickel brass alloy in soft state is 400MPa, and the elongation rate is 65%. It can be processed into tubes, plates, strips and wires by cold and hot pressure, and has good machinability. The weldability. Used in the manufacture of metal coins, pressure gauge tubes, paper nets, marine condenser tubes and other corrosion- and pressure-resistant pipe fittings.
Application of lead brass: Lead brass is an extremely important and most widely used complex brass. It has excellent cutting performance, wear resistance and high strength. It is mainly used for various connectors, valves, and valves in mechanical engineering. In the maintenance of valve stem bearings, hot forging valve blanks, lock industry, and watch industry are three important markets. The low cost of lead brass is an important prerequisite for its wide application. Its alloy composition can contain a variety of alloying elements, and the content The requirements are relatively loose, which has laid the foundation for the comprehensive utilization of copper alloy raw materials.
Application of HPb59-3 lead brass: HPb59-3 lead brass has good cold and hot workability and excellent machinability. It is usually used to make various pins, screws, washers, hardware, pipe fittings, bearing retainers, etc.
Application of H59-1 lead brass: It is a widely used lead brass. It is characterized by good machinability, good mechanical properties, can withstand cold and hot pressure processing, easy welding, and good fiber welding. , It has good stability to general corrosion, but has a tendency to corrode and crack. It is mainly used for air-conditioning valves, hardware machinery, etc.
Application of manganese brass: Manganese brass is widely used in ships and marine engineering due to its excellent strength and cold and hot workability. It can also be used as a wear-resistant material for friction pairs of high-pressure pumps and automotive synchronous gear rings.
Application of HMn58-2 manganese brass: HMn58-2 manganese brass has high corrosion resistance in seawater, superheated steam and chloride, but has a tendency to corrode and crack; good mechanical properties, low thermal conductivity and electrical conductivity, easy to be in hot state Under pressure processing under cold conditions, the pressure workability is acceptable, and it is a widely used brass variety. HMn58-2 manganese brass is used for important parts working under corrosive conditions and low-current industrial parts.
Application of HMn58-2 manganese brass: HMn58-2 manganese brass has high corrosion resistance in seawater, superheated steam and chloride, but has a tendency to corrode and crack; good mechanical properties, low thermal conductivity and electrical conductivity, easy to be in hot state Under pressure processing under cold conditions, the pressure workability is acceptable, and it is a widely used brass variety. HMn58-2 manganese brass is used for important parts working under corrosive conditions and low-current industrial parts.
Application of HAl60-1-1 aluminum brass: HA160-0-1 aluminum brass has high ground strength, good corrosion resistance in the atmosphere, fresh water and sea water, but is sensitive to corrosion cracking, and has good pressure workability under hot conditions. Low plasticity under cold conditions. HA160-0-1 aluminum brass is used for structural parts requiring corrosion resistance, such as gears, worm gears, bushes, shafts, etc.
Application of tin brass: tin brass generally has high strength and hardness. The biggest feature is excellent seawater corrosion resistance. Therefore, it is widely used in marine industry and can be used to make terminals, instrument clips, spring washers, Spring bushings for vehicles, high-strength corrosion-resistant condensers for ships and thermal power plants, welding rods for marine structures, parts, etc.
Application of silicon brass: silicon brass has good mechanical properties, high corrosion resistance, no tendency to corrode and crack, and wear resistance. It has good pressure workability in cold and hot conditions, and is easy to weld, braze, and cut Good sex. Thermal conductivity is the lowest among brass. Mainly used for ship parts, steam pipes and water pipe fittings, etc.
Application of iron brass: Iron brass has high strength, toughness, good anti-friction properties, high corrosion resistance in the atmosphere and sea water, but has a tendency to corrode and crack, and has good plasticity under hot conditions. Iron brass is used to make structural parts that work under friction and corrosion by seawater.
Common problems of surface treatment of brass machined parts
What surface treatment can be used for brass machining parts?
1. Can brass machining parts be anodized?
Anodizing is the process of forming an oxide film under chemical action. Because copper and brass cannot be effectively carried out in anodizing, the only thing that can be done at present is copper-aluminum alloy.
2. Can brass machined parts be sprayed with powder?
Powder coating is actually a process of applying a dry coating on the surface of a metal. Generally, several ingredients are mixed together and granulated into fine particles. So brass can be powdered.
3. Can brass machined parts be polished?
Grinding or abrasive processing is the process of using a grinding wheel to remove irregularities on the metal surface. So it can be polished.
4. Can brass machined parts be chrome plated?
Due to the need to improve the decorative effect of brass, improve durability and higher impact resistance and corrosion resistance, brass can be plated. The most common is chrome plating and nickel plating on CNC brass parts.
When choosing a surface treatment, we need to understand the characteristics of the material, so that we can choose the corresponding surface treatment according to the application scenario.
Brass machining parts skills
Using the right tools, equipment, parameters and conditions can improve the efficiency of cutting high-speed brass machining parts.
1. Programming is another important aspect of brass cutting. Use the correct G code to set the spindle speed and operation according to your needs.
2. Spindle bushings can be used in your machining shop to protect equipment, workpieces and operators. It can also reduce gaps to suppress vibration and eliminate bar swing to help speed up processing and ensure the quality of brass turned and milled parts.
3. The use of cemented carbide tools or tools with cemented carbide inserts will increase the material removal rate and extend the tool life, and also allow the milling cutter to run at a higher speed.