榶心vlog

Under primitive methods of making wrought-iron it is quite possible to carburize the iron sufficiently to make steel direct from ore.

The hardness of the fleam metal indicated that it was carburized sufficiently to be made of steel.

In some cases of cyanide carburizing, the piece is heated in cyanide to the desired temperature and then quenched.

Under such conditions, carbon is absorbed by the steel surfaces, and a carburized case is produced capable of responding to ordinary hardening and tempering operations, the core meanwhile retaining its original softness and toughness.

It must be packed so that each piece is separate from the others and does not touch the box, with a sufficient amount of carburizing material surrounding each.