What Is Powder Metallurgy? Introducing The Advantages and Disadvantages of Powder Metallurgy!
Knowledge

What Is Powder Metallurgy? Introducing The Advantages and Disadvantages of Powder Metallurgy!

Powder metallurgy uses metal powder as raw material, and forms it into a desired shape using a special processing technology. This processing technology is very similar to that used in the production of ceramics, so powder metallurgy techniques can also be used for the preparation and production of ceramic materials. This article will introduce the relevant technology of the powder metallurgy process in detail, and help the reader understand the advantages and disadvantages of the powder metallurgy process.
Published: Jun 06, 2022
What Is Powder Metallurgy? Introducing The Advantages and Disadvantages of Powder Metallurgy!

What Is Powder Metallurgy?

Powder metallurgy is a form of manufacturing that uses metal powder, and sometimes small amounts of non-metal powders, as raw materials to manufacture materials or products through mixing, forming, pressing, and sintering processes. It is a mass production method with little or no cutting, which can produce structural parts with complex shapes and high structural strength at a low cost. It is presently the main method used for the mass production of bearings and self-lubricating parts.

Powder metallurgy can ensure uniformity of production at low cost, with little need for subsequent mechanical processing. It can greatly save on the amount of metal needed for production, when compared to general melting and casting methods, further reducing the cost of the product. Some refractory metals and their compounds, oxide dispersion strengthened alloys, porous materials, ceramic materials, and cemented carbides can only be manufactured by powder metallurgy methods.

Advantages of the Powder Metallurgy Process

  1. Special materials can be processed.

    Material powder metallurgy can manufacture refractory metals as well as compounds, pseudo-alloys, and porous materials.

  2. Saves metal and reduces costs.
  3. Because powder metallurgy can be pressed to final size, no mechanical processing is required. The loss of metal produced by this method is only 1-5%, while general processing methods can consume as much as 80% of the metal.

  4. Preparation of high-purity materials.
  5. The powder metallurgy process does not melt the material during the material production process, so it will not mix impurities brought by other substances. Sintering is carried out in a vacuum and a chemically reducing atmosphere so oxidation and will not contaminate the material. Therefore, product purity is relatively high.

  6. Correctness of material distribution.

    The powder metallurgy method can ensure the correct composition and uniform proportioning of the material being used.

  7. Mass production reduces costs.
  8. Powder metallurgy is suitable for the production of products with a large number of uniform shapes, such as gears and other products, greatly reducing production costs.

Disadvantages of the Powder Metallurgy Process

  1. The strength and toughness of powder metallurgy products are poor.

    Due to the compaction formed by powder, the internal pores cannot be completely eliminated. Therefore, the strength and toughness of powder metallurgy products are worse than those of castings and forgings with corresponding components.

  2. Powder metallurgy cannot be made into large products.

    Since the fluidity of metal powder is worse than that of molten metal, its shape and size will be limited to a certain extent. Generally, products cannot exceed a weight of 10 kg.

  3. The cost of compression molding is high.

    Due to the high cost of stamping, it is only suitable for mass production.

Development of Powder Metallurgy Products

  1. High-quality structural parts.

    Powder metallurgy is effective for the processing of iron-based alloys, which can be used to form large-volume precision products and high-quality structural parts.

  2. High-performance alloys.
  3. Powder metallurgy can be used in the manufacturing of difficult to process, high-performance, alloy products with uniform dense microstructures.

  4. Mixed-phase special alloys.
  5. Powder metallurgy uses an enhanced densification process to manufacture special alloys that generally contain mixed-phase compositions.

  6. Composite parts.

    Unique processing methods can be used to manufacture composite parts, with unique forms or compositions, that cannot be manufactured with other methods.

Published by Jun 06, 2022 Source :kknews, Source :kknews

Further reading

You might also be interested in ...

Headline
Knowledge
What Exactly is a Planning Machine?
In recent years, various industrially advanced countries have used machines to replace manpower for bench work, making the application of machine tools more extensive and important. Although the processing precision of milling machines and grinding machines is superior to that of planers, the price is more expensive than planers. Generally, small and medium-sized factories still use planers for many initial processing tasks in order to take into account equipment investment costs. So what exactly is a planer? Let's take a look together.
Headline
Knowledge
Simultaneous Tapping Control Structure and Adjustment Technology
With the rapid development of 3C products and the aerospace components industry, the technology of CNC machine tool rigid tapping is more widely used.
Headline
Knowledge
What is a Turbocharger?
Turbochargers are often used to increase the intake air volume of an internal combustion engine, thereby increasing horsepower output.
Headline
Knowledge
What are Turbine Blades?
Turbine blades are an important component of the turbine section in a gas turbine engine. The high-speed rotating blades are responsible for drawing high-temperature and high-pressure air into the burner to maintain the engine's work.
Headline
Knowledge
What are EMRs and EHRs? Indispensable Medical and Health Data Systems in Smart Healthcare
EMR (Electronic medical record) is focused medical data, mainly used by clinicians for diagnosis and treatment. EHR (Electronic health record) focuses on personal health data, which includes the state of physical, mental, or mental health. EHR has a wider range than EMR.
Headline
Knowledge
High-Speed Transmission Technology - Universal Serial Bus 4
The demand for high-speed transmission is increasing day by day, which has promoted the rapid development of USB (Universal Serial Bus) technology in recent years. The introduction of a central processing unit (CPU) that supports USB4 symbolizes that USB technology has entered a new era.
Headline
Knowledge
What are the Classifications of Abrasives?
Abrasives are a general term for abrasives and abrasive tools, including abrasive products and abrasive products.
Headline
Knowledge
What is Power Machinery?
The manufacture, operation, and maintenance of land, sea, and air vehicles are all covered in the power machinery industry.
Headline
Knowledge
Tech to Wear: Technical Textiles
One of the simplest ways of classification is to classify textiles other than general clothing and home decoration textiles as technical textiles. Let’s see what are so called Technical Textiles.
Headline
Knowledge
What is the Textile Industry?
The upstream of the textile industry chain is the petrochemical raw material. After being manufactured into nylon fiber, polyester fiber, rayon fiber, carbon fiber and other human fiber products, it is spun into yarn, then woven into cloth, and then bleached, dyed, printed, Dyeing and finishing procedures such as coating, finishing, tailoring and sewing into garment products or other related textile products. The textile manufacturing process can be divided into four stages: fiber, textile, dyeing and finishing, ready-to-wear/home textiles, among which textiles can be further divided into two steps: spinning and weaving: spinning is the transformation of roving into spun yarn. After being sent to the factory, the yarn is inserted into the operation axis of the textile machine table, and the textile machine table pulls the yarn upward and sends it to the textile machine; the next step is the weaving step, at this stage, the shuttle is used in the textile machine. It shuttles back and forth continuously, and finally weaves it into a piece of cloth. After finishing the cloth fabric (including cotton, wool, synthetic fiber, etc.) into a box, it can be sent to downstream manufacturers for post-processing to form a textile industry chain.
Headline
Knowledge
The Automatic Detection Method of Total Hydrocarbons in Air
Total petroleum hydrocarbons are a mixture of many different compounds. People can be exposed to total petroleum hydrocarbons in several ways, including fuel pumps, oil spilled on the road, and chemical use at work or home. Certain total petroleum hydrocarbons can affect the nervous system, causing headaches and dizziness.
Headline
Knowledge
Underwater Robotics - Science and Technology for Subsea Exploration
Underwater robotics is not only used in rescue and search, it has already been used in marine resource exploration, seabed topographic mapping, and the construction and maintenance of marine engineering structures.
Agree