PURPOSE: To obtain an ingot having good quality even if the difference in m.p. between a core material and insert-casting material is ≥150°C in the stage of producing the low-melting nonferrous clad ingot by controlling the casting temp. of the molten insert- casting material and the rising speed of the molten metal surface in a casting mold according to the m.p. of the core material and liquidus line temp. of the inset-casting material.
CONSTITUTION: The thickness of the solidified shell of the molten metal is smaller as the difference (the degree of overheating of the molten metal) ΔT between the casting temp. of the molten metal of the insert-casting material and the liquids line temp. of the insert-casting material for said material is larger in the case of using an Ni-Cu alloy having 1,340°C m.p. for the core material and a carbon steel having 1,520°C liquidus line temp. for the insert-casting material. The thickness of the above- mentioned shell is smaller as the initial temp. of the core material surface is higher. The initial temp. degreases parabolically with an increase in the rising speed V of the molten metal surface in the casting mold and the core material component leaks to the insert-casting material side at ≥300°C initial temp. The combination of the degree ΔT of overheating of the molten metal and the speed V is controlled in a suitable range in order to prevent the leakage from the above-mentioned result and the range thereof varies with the m.p. of the core material.
| JPS61266153 | PRODUCTION OF CLAD STEEL |
| JPS60152359 | PRODUCTION OF COMPOSITE MATERIAL |
HAIDA OSAMU
KAKIO YASUHIRO
