A kind of copper alloy vacuum continuous melting and casting method

Abstract

The invention discloses a vacuum continuous melting casting method for a copper alloy, which adopts a vacuum continuous melting casting device for the copper alloy. The device comprises a vacuum melting chamber, a continuous vacuum feeding chamber, a vacuum casting chamber, an up-flow groove, a down-flow groove, a crystallizer, a dummy bar head and a traction machine; a melting cavity is formed inthe vacuum melting chamber; a melting crucible which can be inclined and returned is arranged in the vacuum melting chamber; an induction coil is arranged on the melting crucible; a casting cavity isformed in the vacuum casting chamber; a casting crucible is arranged in the vacuum casting chamber; a heating element is arranged on the outer side surface of the casting crucible; through cooperatedutilization of the vacuum melting chamber, the continuous vacuum feeding chamber, the vacuum casting chamber, the up-flow groove, the down-flow groove, the crystallizer, the dummy bar head and the traction machine, the vacuum continuous feeding, continuous melting and continuous casting are realized; a metal which is easy to oxidize can be molten; the stability of alloy components is ensured; degassing defining can be performed on a melt by adjusting the vacuum degree; and the service lives of the products, such as the crucibles and the flow grooves, can be prolonged.

Description

technical field [0001] The invention relates to the technology in the field of copper alloy casting, in particular to a copper alloy vacuum continuous melting and casting method. Background technique [0002] At present, the ingot production methods of copper and copper alloys are mainly up-drawing, horizontal continuous casting and vertical down-drawing casting under atmospheric smelting. Since this type of production method is under non-vacuum atmospheric conditions, it is easy to realize uninterrupted feeding. , smelting and casting to achieve continuous preparation of ingots. However, because it is a non-vacuum system, when some refractory and easy-to-oxidize copper alloys are processed, due to reasons such as oxidation, gas absorption, and large amount of slag, it will cause a large amount of burning loss of elements and deterioration of casting conditions, which cannot guarantee alloy melting. Due to the stability of the body composition, qualified ingots cannot be pr...

AI Technical Summary

Problems solved by technology

This design is suitable for the production of pure metals, but not for the production of alloys, because the smelting of alloys requires a sufficient homogenization process, sufficient mixing of alloying elements, and sufficient standing time. The method of casting while feeding is obviously difficult to achieve uniformity

2. Due to the large impact of the added cold material on the temperature of the melt during feeding, it will have a great impact on the casting process, and the stability of the quality of the cast rod cannot be guaranteed

3. The feeding design from top to bottom makes it difficult to install thermocouples in the melting chamber for temperature measurement, which brings great inconvenience to the casting process

4. Due to length limitation, it is difficult for the vertical drawing design to realize the continuous receiving of large-sized metal blanks

Therefore, the design is also difficult to adapt to high-quality vacuum continuous ingot casting of copper alloys

[0006] Chinese invention patent application CN201710394134.X proposes an integrated device and method for smelting plus acoustic-magnetic coupling continuous casting under vacuum conditions. For casting, the cast rod needs to be vacuumed before it can be taken out, which requires a very large second vacuum chamber and cannot be used for continuous production

In addition, the horizontal continuous casting in the medium frequency induction furnace of this invention has the disadvantages of large temperature fluctuations, unclean metal casting (more residues), etc.

[0007] In addition, the Chinese utility model patent ZL201020527636.9 proposes a vacuum smelting aluminum casting furnace, which also cannot achieve continuous feeding, and can only be produced one furnace at a time, and cannot achieve continuous feeding, continuous smelting, and continuous casting.

And it has only one heating furnace, and there is no temperature supply in the casting process, which is difficult to realize in actual production

Images