Sintering is done by putting your parts through a rather toasty furnace. The sintering process causes the metal particles to bond together so you get a part that does what you need it to do. Melting actually gets the metal hot enough that it changes from solid to liquid. Sintering is different because the heating process is highly controlled. You get the enhanced properties you need without having to melt the metal.
One of the great things about sintering is that you can easily make parts out of metals with high melting points. The last two points are of key importance to the customer. These steps are what produce better properties for your part. Conventional sintering and high-temperature sintering are different shades of the same color. However, the extra cost can produce powdered metal material properties not available in any other way.
One study showed that high-temp sintered parts improved in the following ways:. There are a few potential drawbacks to consider, though:. Today, a select few powder metallurgy suppliers are going beyond the temperatures normally considered to be high-temperature sintering. To learn more about sintering, or how your project could combine the net shaping ability of PM with the strengthening ability of sintering to improve part performance, ask an engineer below.
Or, to keep learning on your own, check out the related resources underneath. Editor's note: This article was originally published in September and was recently updated.
Our internal systems have been inspected for reliability and cost effectiveness, and received the seal of approval. What is Sintering? The Sintering Process in Metallurgy The majority of metals can be sintered. The sintering process in metallurgy has three stages. Initial Stage: The first stage of metal powder sintering involves the materials being heated in the furnace at a temperature rate that induces the creation of martensitic, crystalline structures.
Final Stage: By this powder sintering stage, the original sintering powder materials have now become a mostly solid form.
Sintering Temperature and Liquefaction One of the biggest differences is the liquefaction of the material. Uses of Sintering and Melting While sintering and melting have similarities, they are in fact two different processes that have different applications. Uses of Sintering Sintering has a few different uses. Uses of Melting Melting, on the other hand, has many uses depending on the material being melted and why it's being melted. Sintering and Melting Key Takeaways Key points to remember about sintering and melting include: Sintering combines materials by heat and pressure, without melting involved.
Melting combines particles by heating them till they liquify and combine as one material. Sintering can occur at low temperatures if enough pressure is applied. Sintering is most often used in combining metals with high melting points and for creating custom metal forms with a 3D printer since the sintering temperature is so low. Melting is commonly used for combining metals and for changing the physical characteristics of materials Interested in wire forms for sintering processes? Author: Marlin Steel.
Its industrial material handling containers serve many industries including aerospace, defense, medical and automotive. Request a Quote Today. Subscribe to Our Blog. Translate This Page. X Learn what we can create for you. Depending on materials and techniques, sintering can take anywhere from a few milliseconds to over 24 hours. Material differences that effect how long the process may take include the mobility of the atoms, the self-diffusion coefficients, melting temperature, and level of thermal conductivity.
In addition, field assisted techniques can reduce sintering times while selective laser sintering basically, 3D printing for metals is slower and the traditional oven process is slower still. The addition of a liquid phase will also speed up sintering times.
However, faster sintering times can lead to reduced density and residual porosity. While this process can occur naturally for mineral deposits, it is also widely used by a range of industries to manufacture items from materials including ceramics, metals and plastics. Sintering occurs at heats below the melting point of the materials, making it useful for creating items from metals that have high melting points.
There are a range of different techniques depending on factors such as the use of electrical currents, pressure and heat sources as well as the actual materials being sintered. Direct laser sintering DLS is an advanced, rapid tooling and manufacturing process that enables production of near net-shape metal parts.
Powder bed fusion PBF is an additive manufacturing process and works on the same basic principle in that parts are formed through adding material rather than subtracting it through conventional forming operations such as milling. Additive manufacturing AM or additive layer manufacturing ALM is the industrial production name for 3D printing, a computer controlled process that creates three dimensional objects by depositing materials, usually in layers.
Support for SMEs. Software Products. Go to Technical knowledge Search. Login Login. Members' Portal. A Definitive Guide. What is Sintering? Powder metallurgy is the study of sintering using powder-related processes.
Contents Click the links below to skip to the section in the guide: What is the sintering process? How does it work? Types Advantages Where is it used? FAQs Conclusion. TWI TWI provides support to our Industrial Members in a range of areas including material product testing , welding and joining , manufacturing and production support , hot isostatic pressing , and more. You can find out more by contacting us, below: contactus twi.
What is the Sintering Process? How Does it Work? Types There are several types of sintering, depending on the material being joined or the specific sintering process, as follows: Ceramic Sintering Sintering is used in the manufacture of ceramic objects including pottery.
Metallic Powder Sintering Most metals can be sintered, particularly pure metals in a vacuum where surface contamination cannot occur. Plastic Sintering Plastic items that need specific material porosity are formed by sintering, including for applications such as filtration units and the control of fluid and gas flows. Liquid Phase Sintering This process is used for materials that are difficult to sinter. Permanent Liquid Phase Sintering This process is similar to regular liquid phase sintering, except it promotes capillarity to attract the liquid into open pores leading to grain movement and improved packing.
Spark Plasma Sintering This type of sintering uses pressure and an electric field to enhance the density of ceramic and metallic powder compacts.
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