Basic knowledge of metallurgy and terminology

1, sintering sintering

The heat treatment of the powder or compact at a temperature lower than the melting point of the main component aims to increase its strength through metallurgical bonding between the particles.

2, filler packingmaterial

A material in which green compacts are embedded during precalcining or sintering for separation and protection.

3, pre-burning presintering

The green compact is heated at a temperature lower than the final sintering temperature.

4, pressure sintering pressure

A sintering process that applies uniaxial pressure while sintering.

5, loose sintering loose-powdersintering,gravitysintering

The powder was sintered directly without pressing.

6, liquid-phase sintering liquid-phasesintering

Powders or compacts having at least two components are sintered in the state of forming a liquid phase.

7, over burning oversintering

Sintering occurs when the sintering temperature is too high and/or the sintering time is too long, causing the product to deteriorate compared to the final performance.

8, under-fired undersintering

Sintering occurs when the sintering temperature is too low and/or the sintering time is too short so that the product does not achieve the desired properties.

9. Infiltration

Process for filling voids in unsintered or sintered articles in a molten state with a metal or alloy having a lower melting point than the melting point of the article.

10, dewaxing dewaxing, burn-off

The organic additives (binder or lubricant) in the compact are discharged with heating.

11, mesh belt furnace meshbeltfurnace

In general, the mesh belts protected by Muffle will realize the parts in a continuous furnace in the furnace.

12, Walking beam furnace walking-beamfurnace

The sintering furnace in which the parts placed in the sintering tray are conveyed in the furnace by a walking beam system.

13 pusher furnace pushhfurnace

The parts are placed in a boat and the furnace is transported by the propulsion system to convey the parts in the furnace.

14, sintered neck forming neckformation

Upon sintering, a neck-like bond is formed between the particles.

15. Blistering

Due to the violent discharge of gas, blisters form on the surface of the sintered part.

16, sweating sweating

The phenomenon of exudation of liquid phase during the compaction heating treatment.

17, sintered shell sinterskin

In the sintering, a surface layer formed on the sintered part is different from the inside of the product.

18 Relative density relativedensity

The ratio of the density of the porous body to the density of the same constituent material in the non-porous state is expressed as a percentage.

19, radial crushing density radialcrushingstrength

Rupture strength of a sintered cylinder specimen determined by applying radial pressure.

20, porosity porosity

The ratio of the volume of all pores in the porous body to the total volume.

21, diffuse pore diffusionporosity

Due to the Kirkendal effect, one component material diffuses into pores formed in another component.

22, aperture distribution polesizedistribution

Percentages of pore sizes at the various levels present in the material, in number or volume.

23, apparent hardness apparenthardness

The hardness of the sintered material, measured under specified conditions, includes the effect of pores.

24, solid hardness solidhardness

The hardness of a certain phase or particle or region of a sintered material measured under specified conditions, which excludes the influence of pores.

25, bubble pressure bubble-pointpressure

Forcing the gas through the liquid impregnated article produces less pressure for the front air bubbles.

26, Fluid Permeability fluidpermeability

The amount of liquid or gas passing through the porous body per unit of time measured under specified conditions.

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