CN1107762A

CN1107762A - Method and equipment for exciting solidification of metal

Info

Publication number: CN1107762A
Application number: CN 94102097
Authority: CN
Inventors: 陈代富
Original assignee: CHONGQING IRON AND STEEL DESIGN INST MIN MI
Current assignee: CHONGQING IRON AND STEEL DESIGN INST MIN MI
Priority date: 1994-03-01
Filing date: 1994-03-01
Publication date: 1995-09-06

Abstract

The exciting solidifying method for casting metal features that pneumatic or electric exciter is used to change the static solidification of molten metal into dynamic cooling, crystallization and solidification, resulting in easy removal of gas and impurities in molten metal, uniform crystal structure and thus high product quality and finished product rate.

Description

Method and equipment for exciting solidification of metal

The present invention relates to a kind of clotting method and equipment of cast metal, production method and equipment during particularly cast tube is produced.

Existing various casting technique, liquid metal are at casting mold or continuously, cooling in the crystallizer of semi-continuous casting, crystallization, the process of solidifying generally all be in a kind of relatively tranquiler state.Such process of setting (abbreviation static freezing) is present in gas in the liquid metal, is mingled with and is difficult for getting rid of; Tissue after solidifying, its grain size is inhomogeneous, and grain shape is undesirable; Therefore various defectives such as the organization center after solidifying is partly loose have influenced the yield rate and the mechanical performance of casting.

Task of the present invention is to use impeller, and the static freezing of liquid metal is become cooling, crystallization under the affective state, solidifies.

The present invention can realize in two ways: the liquid metal that the activation energy that one produces impeller is directly passed in the crystallizer makes it exciting; It two makes impeller that activation energy is passed to cooling medium, and cooling medium passes to casting mold or crystallizer wall with activation energy, and casting mold or crystallizer wall pass to liquid metal with activation energy again, and liquid metal is got excited, thereby realizes exciting solidification.

Because liquid metal becomes exciting solidification by static freezing, be present in gas in the liquid metal, be mingled with etc. got rid of easily; Tissue after solidifying, its homogeneous grain size, thereby improved product quality and yield rate, and improved mechanical performance of products, reduced product cost.

The present invention is easy to realize that on particularly thin or thin tubulose, tabular strand, the cast tube machine, effect is more remarkable on the continuous or semicontinuous casting machine of various coloured, ferrous metal.As on existing semi-continuous pipe casting machine, using, can improve the common grey iron pipe of being produced, the quality of ductile iron pipe, withstand voltage and mechanical performance.Also can utilize the present invention to produce the tubulose base of high-quality other materials,, or directly produce the production tube of other materials with the minimizing rolling pass.

Below in conjunction with accompanying drawing embodiments of the invention are described in further detail.

Fig. 1 is the crystallizer installation diagram of exciting solidification type cast tube machine

Fig. 2 is vertical D.C.casting ingot crystal device profile

Fig. 3 is that vapour can the impeller profile

Fig. 4 is the A-A sectional drawing of Fig. 3

Fig. 5 is an electric energy impeller profile

Fig. 6 is that the B of Fig. 5 is to view

Part 1 is the cooling water inlet pipe of interior crystallizer among Fig. 1, part 2 is drainpipes of intercrystalline, part 3 is that metal waters prosperous mouthful, part 4 is impellers, part 5 is metal mold cavities, and part 6 is intercrystalline walls, and part 7 is outer crystallizer inwalls, part 8 is the bellmouth cores that form bell-and-spigot pipe female end inwall, and part 9 is skirt dishes of elevating mechanism.The process that realizes exciting solidification is as follows: inject before the liquid of cast metal in metal mold cavity 5, continuously supply with cooling water by cooling water inlet pipe 1 to inside and outside crystallizer, impeller 4 passes to intercrystalline wall 6 with activation energy by cooling water.Then molten metal is continuously injected metal mold cavity 5 by watering prosperous mouthful 3, molten metal quilt in die cavity 5 is exciting, and cooling, crystallization in excitement, solidify, the pipe of coagulation forming is successively drawn metal mold cavity 5 by skirt dish 9, till the pipe range of drawing meets the requirements of length, at this moment stop to inject molten metal to watering prosperous mouthful 3.

One or more impellers 4 are installed in the metal mold cavity 5 among Fig. 2, and when injecting cast metal liquid in metal mold cavity 5, impeller 4 directly passes to molten metal with activation energy, and molten metal by excitement, and cooling, crystallization in excitement, solidifies die cavity 5 in.

Part 10 is steam pipes among Fig. 3, and part 11 is insulating tubes, and part 12 is location-plates.Part 1 is the interior crystallizer water inlet pipe among Fig. 4.

The course of work of vapour energy impeller is as follows:

Pressure is the steam of 0.1～1.0MPa, and for example the steam of 0.5MPa is spurted into by steam pipe 10 in the cooling water of interior crystallizer, and in utmost point expansion rapidly in the short time, make the cooling water pressurized, do not have and become water, the cooling water pressure is disappeared thereupon the water logging that is cooled rapidly again.The cooling water of supercharging, decompression constantly acts on crystallizer wall 6, and crystallizer wall 6 is given liquid metal in the golden type die cavity 5 with force transmission, thereby makes liquid metal cooling, crystallization under affective state, solidify.

Part 13 is vibration resistance, heat-resisting insulation tube among Fig. 5, and part 14 is copper rod electrodes, and part 15 is location-plates, and part 16 is earth electrodes.Part 1 is the interior crystallizer water inlet pipe among Figure 16.

The course of work of electric energy impeller is as follows: (positive and negative electrode of 10kV～70kV) is connected on respectively on copper rod electrode 14 and the earth electrode 16 with high-pressure pulse direct current, make the water generates shock wave by the pulsed discharge between two torches, and pass to crystallizer wall 6, thereby make the liquid metal excitement.

The exciting energy size of two kinds of impeller generations and the exciting time number average of each second can be regulated.

Claims

1, a kind of method of exciting solidification of metal, it is characterized in that the activation energy that impeller produces is passed to cooling medium, cooling medium passes to crystallizer wall with activation energy, crystallizer wall passes to liquid metal with activation energy again, liquid metal is got excited, thereby realize liquid metal cooling, crystallization in excitement, solidify.

2, by the described exciting solidification of metal method of claim 1, it is characterized in that the activation energy that impeller produces is directly passed to liquid metal in the crystallization, liquid metal is got excited, thereby realize liquid metal cooling, crystallization in excitement, solidify.

3, a kind of vapour energy impeller is made up of metal tube and insulating tube, it is characterized in that metal tube is enclosed within the insulating tube, and combine closely between the two, location-plate at one end is installed, pressure is that the steam of 0.1～1.0MPa links to each other with metal tube one end, send in the cooling water, produce activation energy.

4, a kind of electric energy impeller, form by copper rod electrode and earth electrode, it is characterized in that the copper rod electrode has vibration resistance, heat-resisting insulating materials outward, with location-plate earth electrode is fixed on outside the insulating barrier, (10kV～70kV) positive and negative electrode is connected on respectively on copper rod electrode and the earth electrode with high-pressure pulse direct current.

5, by claim 3 or 4 described impellers, it is characterized in that exciting energy size and the exciting number of times of each second that two kinds of impellers produce, all can regulate.