Material Conditions

The material condition is the form, heat treatment, temper, etc. of the material. Some common forms of heat treatment include:

Aging

Keeping an alloy at an elevated temperature for a long period of time to allow precipitation to take place. See also precipitation hardening.

Annealing

Heating to and holding at a specific temperature and then cooling at a specific rate. Generally used to soften material for cold working. improve machinability, or alter/improve physical and sometimes chemical

Normalizing

Austenitizing a ferrous alloy (heating above the transformation range) and subsequently cooling it in open air to relieve internal stress and provide uniform composition and grain size. Results in a harder, stronger steel than annealing.

Precipitation Hardening

Keeping an alloy at an elevated temperature for a long period of time (see aging) to allow the controlled release of constituents (alloying elements) to form precipitate (fine particles separated from the solid solution) clusters which increase the yield strength of the alloy.

Quenching

Rapidly cooling a metal after heating it above the critical temperature. Usually produces a harder metal in ferrous alloy, while most non-ferrous alloys become softer.

Tempering

Heating to a temperature below the transformation range for a specific time and then allowing it to cool in open air. Usually performed after hardening to reduce excess hardness and increase toughness (ability to absorb energy and plastically deform without breaking).

print

0 replies

Comment on this FAQ

Want to join the discussion?
Feel free to contribute!

Comment on this FAQ

Your email address will not be published. Required fields are marked *