What Are Powdered Metal Parts ?

The definition of powdered metal parts
Powdered metal parts are metal components manufactured from metal powder (or a mixture of metal and non-metal powders) through processes such as material mixing, pressing and molding, sintering and densification, followed by subsequent finishing, oil impregnation, and heat treatment. Essentially, this is a manufacturing technique that "uses powder as the raw material to produce metal parts through a process akin to firing ceramics.".

Core manufacturing process
• Powder preparation: Metal powders are produced through processes such as atomization and reduction, with the composition, particle size, and shape of the powder adjustable according to requirements .
• Ingredient Mixing: Mix powders of different components in proportion to ensure uniform distribution of ingredients .
• Press forming: The powder is pressed into the desired shape of a blank in a mold under high pressure, at which point the blank possesses certain strength but contains numerous pores .
• Sintering: The blank is heated in a high-temperature furnace under a protective atmosphere, where powder particles bond through diffusion, melting, and welding, thereby imparting sufficient strength and hardness to the component .
• Post-processing: Perform finishing, oil impregnation, heat treatment, surface treatment, and other processes as required to further enhance the precision and performance of the parts .

Main advantages

• High material utilization rate: almost no cutting processing, material utilization rate can reach over 95%, significantly reducing costs .
• Can manufacture complex structures: capable of forming parts with complex internal cavities, tooth shapes, and steps in one go, avoiding subsequent complex processing .
• Strong controllability of performance: By adjusting the powder composition and process parameters, materials with special properties can be manufactured, such as porous materials and composite materials .
• Batch production advantages: suitable for large-scale production, good product consistency, high production efficiency .

Common application scenarios
• Automotive industry: engine valve seats, connecting rod bushings, gears, filter parts, etc .
• Mechanical manufacturing: various types of gears, bearings, camshafts, friction plates, etc .
• Home appliance industry: air conditioning compressor parts, washing machine clutch parts, etc .
• Electronic communication: mobile phone antenna bracket, connector parts, etc .
• Medical devices: artificial joints, surgical instrument parts, etc .