4. Whiteheart Malleable Cast Iron
White cast iron (white cast Iron) are in good working order is placed in cans where they are surrounded by a mixture of the useless and the particles are useful as haematite ore (haematite ore), tin is an organization which will then be incorporated into the kitchen, then heated slowly up to 9500C. Once deposited in the kitchen is then removed and cooled slowly and removed from the cans and cleaned and ready for macining process.
This process gives the opposite effect of carburising process for surface hardening, where the carbon element will move as a whole only from thin sections. The core part of the thick material will consist of two elements namely the elements of pearlite and some elements of the carbon in the form of nodules. microstruktur of malleable cast iron is shown in the following figure.
Whiteheart malleable cast iron are included in the list of british standards, contained in two classes according to the tensile stress and strain. whereas the hardness numbers depending on the thickness and distance from the surface, for the flimsy material and the surface is thick and can reach 120 HB to 220 HB increased.
Whiteheart malleable cast iron is used for the manufacture of motorcycles socket frame, steering column housings, wheel hubs, farm machinery, fork (fork), brakes (brake), steering screw (thread guides), textile machines and others.