1. 
   Case hardening
   Case hardening or surface hardening is the process of hardening the surface of a metal, often a low carbon steel, by infusing elements into the material`s surface, forming a thin layer of a harder alloy. Case hardening is usually done after the part in question has been formed into its final shape,...
   Found op http://en.wikipedia.org/wiki/Case_hardening
   
   
2. 
   Case Hardening
   Hardening a ferrous alloy so that the outer portion, or case, is made substantially harder than theinner portion, or core. Typical processes used for case hardening are carburizing, cyaniding, carbonitriding,nitriding, induction hardening and flame hardening. See also: Nitrating.
   Found op http://www.diracdelta.co.uk/science/source/c/a/case%20hardening/source.html
   
   
3. 
   case hardening
   A generic term covering several processes applicable to steel that change the chemical composition of the surface layer by absorption of carbon, nitrogen, or a mixture of the two and, by diffusion, create a concentration gradient. The outer portion, or case, is made substantially harder than the inn...
   Found op http://www.encyclo.co.uk/local/20742
   
   
4. 
   case hardening
   (from the article `ocean`) ...sea level, they are subjected to subaerial erosion. Surface slope, or gradient, determines the amount of runoff and is a prime factor in this ...
   Found op http://www.britannica.com/eb/a-z/c/31
   
   
5. 
   case hardening
   A drying defect characterised by the presence of compression stresses in the outer zone and tensile stresses in the core. It occurs when rapid drying has caused permanent set of the outer zones of a piece of wood
   Found op http://oak.arch.utas.edu.au/glossary/view_glossarylist.html?term=c
   
   
6. 
   case hardening
   A generic term covering several processes applicable to steel that change the chemical composition of the surface layer by absorption of carbon, nitrogen, or a mixture of the two and, by diffusion, create a concentration gradient. The outer portion, or case, is made substantially harder than the inn...
   Found op http://www.encyclo.co.uk/local/21115
   
   
7. 
   Case Hardening
   A defect in the lumber caused by improper drying. Case Hardening is caused when a board is dried too fast. The outer layers in a case hardened board are compressed while the inner layers are in tension.
   Found op http://www.kooturlumber.com/glossary.shtml
   
   
8. 
   Case hardening
   Hardening the surface of steel without affecting the core metal.
   Found op http://www.metalbulletin.com/Glossary.html
   
   
9. 
   Case-hardening
   See Carburising
   Found op http://www.poeton.co.uk/w1/glossary.htm
   
   
10. 
    Case-Hardening
    Case-hardening is a process whereby iron objects have their outside layer converted to steel. The object is put in a box containing carbon and is heated until red hot. Then it is immersed in cold water where upon a layer of steel forms on the object.
    Found op http://www.probertencyclopaedia.com/browse/GC.HTM
    
    
11. 
    Casehardening
    Case'hard`en·ing noun The act or process of converting the surface of iron into steel. Ure. » Casehardening is now commonly effected by cementation with charcoal or other carbonizing material, the depth and degree of hardening (carbo...
    Found op http://www.encyclo.co.uk/webster/C/31
    
    
12. 
    Casehardening
    • (n.) The act or process of converting the surface of iron into steel.
    Found op http://thinkexist.com/dictionary/meaning/casehardening/
    
    
13. 
    casehardening
    casehardening: see hardening.
    Found op http://www.infoplease.com/ce6/sci/A0911492.html
    
    

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