Sintering | Powder Compaction, Heating & Cooling

For more information, please visit haoyuefurnace.

sintering, the welding together of small particles of metal by applying heat below the melting point. The process may be used in steel manufacturing&#;to form complex shapes, to produce alloys, or to work in metals with very high melting points. In a steel-sintering plant a bed of powdered iron ore, mixed with coke or anthracite, is ignited by a gas burner and then moved along a traveling grate. Air is drawn down through the grate to produce downdraft combustion. As the bed moves forward, a very high heat (1,325°&#;1,500° C [2,400°&#;2,700° F]) is generated that converts the tiny particles into lumps about 2.5 cm (1 inch) in diameter suitable for burning in the blast furnace to convert them to steel. Sintering is also used in the preliminary molding of ceramic or glass powders into forms that can then be permanently fixed by firing.

The driving force in sintering is decreasing surface energy; as the sintering proceeds, adjacent particles partially coalesce owing to viscous flow (as in glass) or to diffusion processes (as in crystalline materials), and consequently the total surface area decreases. The result is improved mechanical and physical properties of the material. See also powder metallurgy.

When we are manufacturing tungsten carbide products, we applied the powder metallurgy method, so sintering is a necessary process. Sintering is a process of heat treatment during which the tungsten carbide powder will be sintered into a solid and stiff tungsten carbide product under high temperature and high pressure. And the temperature is required to increase gradually and just below the melting temperature of tungsten carbide.

The sintering point is the heat and pressure which are enough to reduce porous spaces between the tungsten carbide particles. Different materials have different sintering points. 

If you want to learn more, please visit our website High Temperature Sintering Equipment Supply.

Sintering can increase the properties of tungsten carbide, including thermal conductivity, electrical conductivity, material strength, integrity, and translucency. 

During the sintering, there are four stages. They are the removal of the molding agent and pre-burning stage, solid-phase sintering stage, liquid-phase sintering stage, and cooling stage.

Sintering has many advantages. It requires a high level of purity and uniformity in starting materials. It can also keep the purity of tungsten carbide, because of the simpler subsequent fabrication process that it will make. Sintering can maintain the stabilization of the details of repetitive operations by controlling grain size during the input stages. During this, there is no binding contract between segregated tungsten carbide powder, and also no inclusions, which often occurs in the melting process. Sintering requires no deformation to produce directional elongation of grains. Sintering can be used to produce materials of controlled, uniform porosity, nearly net-shaped objects, and materials that can&#;t be produced by any other technology, as well as high-strength materials like turbine blades. What&#;s more, sintering can improve mechanical strength.

For more information and details, you can follow ZZBETTER and visit: www.zzbetter.com

Are you interested in learning more about High Temperature Sintering Equipment Company? Contact us today to secure an expert consultation!