Which neutral elements do not form carbides?

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• Tauseef Ahmed Shaikh Mukhtar   -Posted on 18 Apr 17
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• Sravanthi   -Posted on 21 Nov 15
  - Alloys steels are obtained when elements such as nickel, chromium, manganese, vanadium, etc. are added to carbon steels.
  
  - These elements impart fine grain size to steel, to improve casehardening properties and elasticity, etc.
  
  - These alloying elements are classified as:
  
  1) Carbide forming elements: Alloy carbides are hard and increases abrasion resistance. Carbides such as chromium and vanadium have maximum hardness during tempering of high alloy tool steels.
  
  2) Neutral elements: The element which neither forms carbides nor causes graphitization is Cobalt. Cobalt refines graphite and pearlite and also improves heat resistance. It contributes to red-hardness by hardening ferrite and improves mechanical properties like tensile strength, fatigue strength and hardness.
  
  3) Graphitizing elements: These elements are used to decompose carbides into graphite.
  

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