What are the commonly used precision metal parts?

u200b Precision metal parts can be divided into two categories: steel and non-ferrous metals (or non-ferrous metals). The alloy of iron with a carbon content of 2% to 4.3% is cast iron, and iron with a carbon content of generally 0.03% to 2%. The alloy of steel is steel. In Fe-C alloy, various alloying elements are purposefully added to improve the strength, hardness, wear resistance and corrosion resistance of steel. Commonly used alloying elements are Si, Mn, Cr, Ni, Mo, W, V, Ti, Nb, B, etc., have formed all kinds of alloy cast iron or alloy steel.u200b Non-ferrous alloys can be roughly divided into: light alloys (aluminum alloys, titanium alloys, magnesium alloys, beryllium alloys, etc.), heavy non-ferrous alloys (copper alloys, zinc alloys, manganese alloys, nickel alloys, etc.), low melting point alloys (lead, tin, etc.) , Cadmium, bismuth, indium, gallium, mercury and their alloys), refractory alloys (tungsten alloys, molybdenum alloys, niobium alloys, tantalum alloys, etc.), precious metals (gold, silver, platinum, palladium, etc.) and rare earth metals. Among them, the most widely used is aluminum alloy. According to statistics, 71% of the entire structure of the Concorde supersonic aircraft is made of special aluminum alloys; high-speed trains, automobiles and other transportation vehicles have increasing demand for aluminum profiles; more and more aluminum materials are used for architectural decoration. It is beautiful and corrosion-resistant; the amount of aluminum wires in power systems and household appliances exceeds copper wires; aluminum foil can be used for packaging food and cigarettes; aluminum alloy can also be used as capacitors, etc. The main processing methods of metal parts are: machining, stamping, precision casting, powder metallurgy, metal injection molding. Machining refers to the process of changing the shape or performance of the workpiece through a mechanical device. According to the difference in processing methods, it can be divided into cutting processing and pressure processing. Stamping is a forming and processing method that relies on presses and dies to apply external force to plates, strips, pipes and profiles to cause plastic deformation or separation, so as to obtain the required shape and size of the workpiece (stamping). There are also special machining, laser machining, electric discharge machining, ultrasonic machining, electrochemical machining, particle beam machining and ultra-high-speed machining. Turning, milling, forging, casting, grinding, CNC machining, CNC CNC centers are all machining.u200b