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Metallographical Cold Mounting

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Good quality Vickers Hardness Testing Machine for sales
Good quality Vickers Hardness Testing Machine for sales
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Metallographical Cold Mounting
Metallographical Cold Mounting

Cold mounting requires no pressure and little heat, and is a means of mounting large numbers of specimens more rapidly than by compression mounting.

 

Materials for cold mounting are classified as polyesters, epoxides and acrylics.
Polyesters are transparent and usually water clear;
Epoxides are almost transparent and straw color;
Acrylics are opaque.

 

Cold mounting materials of all three classifications are two component systems that consist of resin and a hardener; both the resin and the hardener can be liquid, both can be solids, or one can be liquid and the other a solid.

 

Mixing of the resin and the hardener produces exothermic polymerization, and therefore this operation is crytical in producing a satisfactory cure and limiting the temperature to a permissible level. The temperature rise may reduced at the expense of longer curing time.

 

Castable Mounting Resin Properties:

Note EPOXY ACRYLIC POLYCAST Resin
Type Epoxy resin and hardener Acrylic resin and powder Polyester resin and hardener
Peak Temperature 82℉ 80℉ 100℉
Shore D Hardness 82 80 76
Cure Time 6-8 hours 5-8 minutes 6-8 hours
Comments Moderate hardness, low shrinkage, transparent Very fast curt, translucent, some shrinkage Transparent, clear

 

Pub Time : 2017-02-28 10:56:17 >> News list
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