Metallurgical basic knowledge and terminology

1 sintering sintering
The heat treatment of powders or green compacts at a temperature lower than the melting point of the main component aims to increase their strength through metallurgical bonding between the particles.

2 , filler packingmaterial

In the pre-firing or sintering process in order to separate and protect the role of embedding a compact in a material.

3, pre-burning presintering

Heat treatment of compacts at temperatures below the final sintering temperature.

4, pressure sintering pressure

A uniaxial pressure sintering process is applied at the same time as sintering.

5, loose-sintering loose-powdersintering,gravitysintering

The powder is sintered directly without pressing.

6, liquid-phase sintering liquid-phasesintering

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

7 over burning oversintering

Sintering in which the sintering temperature is too high and/or the sintering time is too long to deteriorate the final performance of the product.

8, under-fired undersintering

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

9, Infiltration

Process for the filling of voids in unsintered or sintered articles in a molten state using 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 heat.

11, mesh belt furnace meshbeltfurnace

In general, the mesh belts protected by muffle will realize the parts to achieve continuous furnace sintering furnace.

12 , Walking beam furnace walking-beamfurnace

The stepping beam system is used to transfer the parts placed in the sintering tray to the sintering furnace in the furnace.

13, pusher furnace pushhfurnace

The parts are loaded into the boat and the parts are conveyed in the furnace through the propulsion system.

14, sintered neck forming neckformation

A neck-like bond is formed between the particles during sintering.

15 , blistering blistering

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

16, Sweating sweating

5. Liquid phase exudation during compaction heating.

17, sintered shell sinterskin

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

18 , relative density relativedensity

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

19, radial crushing density radialcrushingstrength

The fracture strength of a sintered cylinder specimen as measured by the application of 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

One kind of component material caused by the Kirkendall effect diffuses into the pore formed in another component element.

22, pore size distribution ponesizedistribution

Percentage of pores at all levels in the material, in terms of volume or volume.

23, apparent hardness apparenthardness

The hardness of the sintered material is measured under specified conditions and it 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 excludes the influence of pores.

25, bubble pressure bubble-pointpressure

Force the gas through the liquid impregnated article to produce the minimum pressure required for the first bubble.

26, fluid permeability fluidpermeability

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