Why Grey CI Castings Exporters Carry Out Heat Treatment for Grey Iron

Cast Iron (CI) is an alloy of iron that contains silicon and carbon content. Grey iron is a ferrous CI metal that contains 2.5% to 4% Carbon, manganese, and 1% to 3% silicon. It is the oldest and most widely accepted cast iron form that is used by manufacturers to fabricate CI castings in their foundries under supervision of professionals. Gray CI castings are known for their brittleness and are used for making tough and complex casting designs using sand casting process. Exporters of CI castings supply components to various industrial clients in India and across the world.

 
How graphite impacts on the strength of gray CI castings?

The graphite and iron mixture makes gray iron casting softest and weakest. Manufacturers and exporters of CI castings enhance the strength and sturdiness by including carbon content in the mixture. Silicon enhance the fluidity of grey cast iron and thus, engineers working in foundry often use silicon and carbon during solidification of gray ferrous cast iron.

The heat treatment of grey ferrous cast iron

CI Castings Exporters usually carry out stress relieving treatment for grey iron in the foundry. Gray cast iron generally consist residual stresses due to different rates of cooling procedures throughout several casting sections. These residual stresses are responsible for lowering the strength and increasing the distortion rate and at times cause cracking.

To treat these stresses, manufacturers attempt heat treatment or annealing process to enhance the machinability. CI Castings Exporters carry out heat treatment processes to make grey ferrous cast iron hard and temper. Once grey iron achieved its machinability, it can be used for producing different casting shapes and models. These shapes will have good wear resistance property and can be used as diesel cylinder liners, gears, sewer covers, motor frames, etc.