Hot-cold combined casting mould horizontal continuous casting equipment of cupronickel tubing and technology thereof

Abstract

The invention provides hot-cold combined casting mould horizontal continuous casting equipment of cupronickel tubing and a technology thereof. The equipment comprises a smelting system for melting metal, a heat insulation system for storing molten metal, a horizontal continuous casting system for casting and shaping and an auxiliary system, wherein in the continuous casting system, the front end of a cold shaping section is provided with a hot shaping section so as to effectively control the solid-liquid interface of a tube billet to be located near the juncture of a cold section and a hot section; a shorter water-cooling copper bush and electromagnetic induction heating are adopted to reasonably design coil structure and the power and the frequency of a heating power supply, reduce electromagnetic constraint force to balance the hydrostatic pressure of a metal fusant, reduce friction between a primary kish and the casting mould, improve the surface quality of the tube billet and prolong the service life of the casting mould. Thus, the inner surface and the outer surface of the tube billet manufactured by the invention have good quality and no defects of orange peel, wrinkles, cracks and the like, net shape continuous casting is realized, the production efficiency and the metal yield are improved and the production cost is obviously lowered.

Description

technical field [0001] The invention belongs to the technical field of material preparation, and in particular provides a hot-cold combination casting mold horizontal continuous casting equipment for white copper pipes and a process thereof. Background technique [0002] Cupronickel alloy has high strength and excellent corrosion resistance. It is a good heat exchange material and structural material in the fields of thermal power, ships, and seawater desalination. Its pipe products are widely used as condensation pipes and heat exchanger pipes. Highly demanding occasions. Among them, BFe10-1-1 and BFe30-1-1 (respectively referred to as B10 and B30) are two representative white copper alloys, and the market demand for their pipes is relatively large. [0003] At present, the production of white copper alloy pipes at home and abroad mainly adopts the pipe-making process of "semi-continuous casting solid ingot-hot extrusion tube billet-semi-finished product drawing (or cold r...

AI Technical Summary

Problems solved by technology

The main problems of this process are: (1) The process flow is long, the process is complicated, the energy consumption is high, the finished product rate is low, and the cost is high; Serious metal oxidation, eccentric scrapping of tube blanks and other problems affect the metal yield and yield; (3) Due to the high nickel content of the alloy and the high viscosity at high temperature, the extrusion die, perforating needle, extrusion cylinder, etc. are easily damaged Copper sticking causes serious defects such as heavy skin, interlayer and deep groove on the surface of the tube billet, which reduces the yield of the extruded tube billet; The geometric loss at the head and tail is relatively large, which reduces the geometric yield of the pipe; (5) Because the tube blank is produced by the extrusion method, the length of the tube blank is limited, so it is not suitable for the production of large coil weight and long size white copper pipe

[0012](1) Only small diameter (Ф30-50mm or less) and thin-walled (3-5mm or less) pipes can be continuously casted, and the casting speed is relatively slow , low production efficiency, lack of competitiveness in mass production, etc.;

[0013](2) Since the solid-liquid interface is near the outlet of the mold, the process control is difficult, and leakage accidents are prone to occur

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