Manufacturing process of large diameter copper tube

Abstract

The present invention discloses a large diameter copper pipe production process, which comprises: 1, forging and stamping, wherein a furnace temperature is increased to 800-900 DEG C, a cooper ingot is forged and stamped into a copper rod, and thermal insulation is performed for 2-3 h; 2, reverse extrusion, wherein the copper ingot is subjected to position limitation by using an outer mold, the cooper rod is subjected to reverse extrusion through an inner mold to form a cooper pipe having the bottom, and the extruded cooper pipe is subjected to thermal insulation for 0.5 h and then is cooled to achieve a room temperature, wherein electric heating is performed on the inner mold and the outer mold during reverse extrusion, such that it is ensured that the temperatures of the inner mold and the outer mold are maintained at 400-450 DEG C; and 3, cold extrusion, wherein the cooper pipe is subjected to cold extrusion to stretch so as to achieve the required size, and thermal insulation is performed for 3-4 h. According to the present invention, the manufacturing process is clear, the temperature and other parameters are reasonably controlled, and particularly the molds are electrically heated during reverse extrusion, such that it is ensured that the cooper rod hardness is moderate and cracking does not occur during the reverse extrusion process so as to ensure manufacture success and quality.

Description

technical field [0001] The invention relates to a manufacturing process of a crystallizer copper tube, in particular to a manufacturing process of a large-diameter copper tube. Background technique [0002] The continuous casting process is the process of injecting molten steel into the crystallizer to continuously obtain casting slabs. It is an intermediate link connecting steelmaking and steel rolling, and is an important part of steelmaking production. The mold is an important part of the continuous casting machine in the smelter, and the copper tube of the mold is an important part of the mold. Since the high-temperature molten steel flows directly through the mold copper tube, in order to stabilize the continuous casting process and ensure the safety of equipment and operators, the mold copper tube is required to have good high temperature resistance, wear resistance and corrosion resistance. With the development of science and technology, there is more and more demand...

AI Technical Summary

Problems solved by technology

With the development of science and technology, there is more and more demand for large-diameter copper tubes (copper tubes with an inner hole diameter greater than or equal to 1000 mm). It takes a long time, and it often does not meet the requirements for the end of back extrusion. The copper rod has been cooled and has a high hardness. Once the back extrusion is performed, it is prone to cracking and will be scrapped.