Production method of large-coil-weight white copper alloy coil pipe

Abstract

The invention provides a production method capable of producing a large-coil-weight white copper alloy coil pipe with the weight being more than 300kg and high rate of finished products, and the method comprises the following steps of (1) smelting a white copper alloy material, and adopting a horizontal continuous casting technology of a composite electromagnetic stirring technology to produce a white copper alloy hollow casting blank; (2) rolling the white copper alloy hollow casting blank which is face milled, and utilizing a duplex pulling device to stretch a rolled pipe; (3) washing the inner wall and the outer wall of the white copper duplex stretched coil pipe, and adopting a passing-type sensing annealing device to continuously anneal the white copper duplex stretched coil pipe; (4) stretching the annealed duplex stretched coil pipe; (5) conducting eddy current test on the white copper stretched coil pipe, and simultaneously horizontally winding the copper pipe to form the large-coil-weight white copper alloy coil pipe; and (6) annealing the large-coil-weight white copper alloy coil pipe needing to be annealed. Due to the adoption of the production method of the large-coil-weight white copper alloy coil pipe, the large-coil-weight white copper alloy coil pipe with single coil weight being more than 300kg can be produced.

Description

technical field [0001] The invention relates to a production method of a coiled tube, in particular to a production method of a large heavy white copper alloy coiled tube. Background technique [0002] At present, the main production method of white copper alloy discs at home and abroad is the traditional process of "semi-continuous casting-extrusion-cold rolling-drawing", which has the disadvantages of long process flow, low yield, and high energy consumption. The characteristics of the process are limited, the finished product rate is less than 50%, and it is impossible to provide qualified extruded white copper tube blanks with a single weight of more than 300kg, and it is also impossible to produce heavy and super long white copper alloy coils. [0003] The existing method of "horizontal continuous casting + planetary rolling" to produce white copper tubes has the following disadvantages: first, the quality of the slab is not high, the grains are coarse, the structure is...

AI Technical Summary

Problems solved by technology

[0002] At present, the main production method of white copper alloy discs at home and abroad is the traditional process of "semi-continuous casting-extrusion-cold rolling-drawing", which has the disadvantages of long process flow, low yield, and high energy consumption. The characteristics of the process are limited, the finished product rate is less than 50%, and it is impossible to provide qualified extruded white copper tube blanks with a single weight of more than 300kg, and it is also impossible to produce heavy and super long white copper alloy coils

[0003] The existing method of "horizontal continuous casting + planetary rolling" to produce white copper tubes has the following disadvantages: first, the quality of the slab is not high, the grains are coarse, the structure is uneven, and heat treatment is required before rolling; Second, the rolling process is unreasonable, the rolling temperature rise is small, and the protective atmosphere is unreasonable, resulting in cracks, oxidation and other defects in the rolled tube, reducing the yield; third, the intermediate annealing process of the white copper coil is limited, and the bell furnace is due to The size is small, which determines that the annealing coil is a small coil, and the coil weight is small, so it cannot produce large coils and heavy coils.