Technology of production of bimetallic and multilayer casts by gravity or spun casting
Technology of production of bimetallic and multilayer casts by gravity or spun casting, at which at least two different metal materials are being gradually cast into the mold, while before casting of the second material there is started feeding of a flame into the mold and the flame is created by stream of aflame inflammable gas. Stream of aflame inflammable gas is created by hydrogen flame.
1. A method of producing bimetallic and multilayer casts by gravity or spun casting, comprising:
providing a mould having a mould cavity;
sequentially casting at least two different metal materials in the mould by pouring in the mould cavity a first molten material and then pouring in the mould cavity a second molten material over the first molten material; and
feeding from a burner a flame of aflame hydrogen gas into the mould cavity at least before the starting of the pouring of the second molten material in the mould cavity, the aflame hydrogen gas passing through the mould cavity to consume all oxygen in the mould and then escaping to further burn in a free space above the mould;
wherein the burner is inserted into the mould cavity and the flame is fed into the mould cavity to consume all the oxygen in the mould cavity, and the flame is continuously fed into the mould cavity after pouring in the first molten material at least until the second molten material is poured into the mould cavity, wherein the second molten material is poured after a time delay to allow for realization of a solidified coating in the first molten material while the flame is fed into the mould, and wherein the burner comprises a tube and the aflame hydrogen is fed through the tube.
2. A method according to claim 1 , wherein feeding of the flame into the mould is started before pouring of the first molten material into the mould.
3. A method according to claim 1 , further comprising finishing the feeding of the flame into the mould when the second molten material covers a whole surface of the first molten material in the mould.
4. A method according to claim 1 , further comprising finishing feeding of the flame into the mould when pouring of the second molten material into the mould is completed.