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35CrMo Centrigugel Casting Cold Mill Steel Core

One of Machining process,Centrifugal casting is the casting method of pouring liquid metal into rotating casting, filling and solidifying into casting by centrifugal force. The metal retraction are good, the casting is dense and the mechanical properties are good.Centrifugal casting can ensure...
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One of Machining process,Centrifugal casting is the casting method of pouring liquid metal into rotating casting, filling and solidifying into casting by centrifugal force. The metal retraction are good, the casting is dense and the mechanical properties are good.Centrifugal casting can ensure chemical composition of the steel core, achieving its  reliability and accuracy. Ther will not be crack,scum stoma and sandstone in its inner and outer surface.




Heat treatment of steel core:

Heat treatment is putting products after rough machining  in a certain medium to change the surface or internal micro structure, and control the performance of a product by  heating, heat preservation, cooling. Basic process of heat treatment: annealing, normalizing and tempering.

1. Annealing

 Annealing is to heat the steel core to the appropriate temperature and then slowly cool the steel core to achieve or close to the equilibrium state.

2. Normalizing 

Normalizing is making steel core cool after it reaches suitable temperature, the effect of normalizing  is similar to annealing, commonly used to improve the cutting performance of material, also sometimes used for low requirements for some parts as the final heat treatment.

3. Quenching

 Quenching is the rapid cooling process in the quenching medium of water, oil or other organic salts and organic water, after the heating of work piece. The steel is hardened after quenching, but it is brittle at the same time.

4.Tempering 

Tempering is in order to reduce the brittleness of steel core. Place the steelcore which is after quenching in higher than the room temperature and under 650 ℃  for a long time of heat preservation,  cooling again , this process is called tempering.

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