Manufacturing process of cupronickel pipe

Abstract

The invention provides a manufacturing process of a cupronickel pipe. The process comprises the steps: mixing a metal copper raw material, a nickel raw material and other trace alloy elements according to the ratio requirement of the cupronickel material, continuously smelting the mixture in a smelting furnace, continuously feeding the molten alloy liquid into a heat preserving furnace through a connection through hole, continuously upwards casting the molten alloy liquid entering the heat preserving furnace to form a copper-nickel alloy pipe blank after the molten alloy liquid passes through a continuous casting crystallizer, clamping and drawing the continuously-cast alloy pipe blank through the pressure of pair rolls on a vertical casting and drawing machine stander, continuously drawing out the pipe blank upwards , cutting off the drawn-out pipe blank according to a given length, primarily straightening the pipe blank, and drawing the straightened pipe blank in one step or multiple steps to form a finished product after the straightened pipe blank is rolled in one step through a primary cold roll mill and annealed in one step. According to the process, the traditional extruding production process is simplified to a novel production process of one-step continuous casting, one-step continuous cold rolling and one-step or multi-step drawing process. The process is an advanced process which is free from smoke and dust pollution and capable of improving the rate of finished products.

Description

Technical field: [0001] The invention relates to a manufacturing process for white copper tubes, in particular to a manufacturing process for producing white copper tubes by one-time continuous casting, one-time continuous cold rolling, and one-time or a few-pass drawing. Background technique: [0002] At present, the production of white copper tubes is produced by high-power extrusion machines at home and abroad. The process is: batching-smelting-ingot-casting-ingot secondary heating-extrusion-rolling (or direct drawing)- Multiple annealing - multiple drawing - finished product. Its shortcoming is that (1) the finished product rate is low, and the finished product rate of almost all factory production processes is only 40%-50%, seriously restricting the development of the white copper tube industry; (2) the investment scale is large. At present, it needs at least 100 million yuan to build a regular white copper pipe production enterprise in China; (3) The pollution is seri...

AI Technical Summary

Problems solved by technology

Its disadvantage is that (1) the finished product rate is low, and the finished product rate of almost all factories is only 40%-50%, which seriously restricts the development of the white copper tube industry; (2) the investment scale is large

At present, it needs at least 100 million yuan to build a regular white copper pipe production enterprise in China; (3) The pollution is serious. Any pipe extrusion process at home and abroad is at the expense of the environment, and the smoke pollution in the production process is difficult to control; (4) High energy consumption, the production of single-ton white copper tubes in general enterprises consumes up to 5000 kWh of electricity, resulting in excessive consumption of electric energy in production costs;