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A Production Process for Reducing Surface Milling of Horizontal Continuous Casting High SN Bronze Strip

A horizontal continuous casting and production process technology, applied in the field of non-ferrous metal pressure processing, can solve the problems of high production cost, energy consumption, milling equipment wear, low product yield, surface quality, size and thickness accuracy, etc., to optimize the production process and ensure Surface quality and dimensional accuracy, and the effect of reducing production and operation costs

Active Publication Date: 2019-09-03
CHINA NON-FERROUS METALS PROCESSING TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This leads to higher and higher production costs, energy consumption and wear of milling equipment, as well as lower and lower product yields, surface quality, dimensional thickness accuracy, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Taking copper alloy QSn8-0.3 as an example, the strip size is 15.5×650×70000mm, and the target product size is 14.8×650×70000mm.

[0020] The present invention reduces the production technology of horizontal continuous casting high Sn bronze strip blank surface milling amount, and it comprises the following concrete steps:

[0021] Step 1. Preheat and dry the covering agent charcoal at 800°C for 6 hours, put the preheated dry covering agent into the melting furnace, the thickness of the covering agent is 20mm, and the lumpiness is 10mm, then heat the melting furnace to 550°C, Add pure zinc ingots with a content of 99.92%, recycled materials, and pure T2 copper ingots with a content of 99.95%, and then raise the temperature to 750°C for the second time, add the intermediate alloy phosphor copper, and then add pure tin with a content of 99.93%, and lead with a content of 99.92% in sequence , heated up to 1180°C, and then stood still for 5 minutes, ready to start casting; ...

Embodiment 2

[0026] Take copper alloy QSn7.0-0.2, strip blank size 18.5×650×80000mm, and target product size 14.9×650×80000mm as an example.

[0027] The present invention reduces the production technology of horizontal continuous casting high Sn bronze strip blank surface milling amount, and it comprises the following concrete steps:

[0028] Step 1. Preheat and dry the covering agent charcoal at 850°C for 5 hours. Put the preheated dry covering agent into the melting furnace. The thickness of the covering agent is 25mm and the lumpiness is 20mm. Then the melting furnace is heated to 580°C. Add pure zinc ingots with a content of 99.93%, recycled materials, and pure T2 copper ingots with a content of 99.96%, then heat up to 780°C for the second time, add the intermediate alloy phosphor copper, and then add pure tin with a content of 99.92%, and lead with a content of 99.95% in sequence , heated up to 1210°C, and then stood still for 7.5 minutes, ready to start casting;

[0029] Step 2. Wh...

Embodiment 3

[0033] Take copper alloy QSn6.5-0.1, strip blank size 16.5×700×70000mm, and target product size 15.7×700×70000mm as an example.

[0034] The present invention reduces the production technology of horizontal continuous casting high Sn bronze strip blank surface milling amount, and it comprises the following concrete steps:

[0035] Step 1. Preheat and dry the covering agent charcoal at a temperature of 900°C for 4 hours. Put the preheated dry covering agent into the melting furnace. The thickness of the covering agent is 30mm and the block degree is 30mm. Then the melting furnace is heated to 600°C. Add pure zinc ingots with a content of 99.96%, recycled materials, and pure T2 copper ingots with a content of 99.92%, then heat up to 800°C for the second time, add the intermediate alloy phosphor copper, and then add pure tin with a content of 99.97%, and lead with a content of 99.96% in sequence , heated up to 1240°C, and then stood still for 10 minutes, ready to start casting; ...

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PUM

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Abstract

The invention discloses a production technology of reducing horizontal continuous casting high Zn bronze strip billet surface milling capacity. The production technology comprises the following stepsof putting a preheated drying covering agent into a melting furnace, then heating the melting furnace to 550-600 DEG C, and sequentially adding zinc and red copper, and secondarily heating up to 750-800 DEG C; then adding phosphor copper intermediate alloy, then sequentially adding tin and lead, and heating up to 1180-1240 DEG C, and making the alloy stand for 5-10min; and using high voltage and low current electromagnetic oscillation for assisting casting with the alternating current magnetic field frequency being 5-10MHz to make a strip billet solidified shell contact with a crystallizer graphite die wall in a separating manner; and finally annealing by heated air circulation severe convection and keeping the temperature. By means of the production technology, the surface defective layerthickness such as segregation, gas holes, cracks and the like of a high Zn bronze strip billet can be effectively reduced, the surface machinery milling capacity can be reduced, the rate of finishedproducts can be improved, the production cost can be lowered and the energy conservation, consumption reduction and environmental protection can be realized.

Description

technical field [0001] The invention belongs to the technical field of pressure processing of non-ferrous metals, and in particular relates to a production process for reducing the amount of milling on the surface of a horizontal continuous casting high-Sn bronze strip blank. Background technique [0002] In the field of copper strip production technology, the upper and lower surfaces of the horizontal continuous casting strip need to be mechanically milled before the bronze strip blank is cold-rolled to remove defects such as segregation, pores, and cracks on the surface of the strip blank during the horizontal continuous casting process layer. The formation of the segregation layer is mainly due to the fact that the maximum solubility of Sn in copper is only about 6%, the diffusion speed is slow, and it is also affected by the denser Pb element, which is easy to form density segregation of Sn during the solidification process; the formation of pores is mainly in the Durin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D11/111B22D11/115C22F1/08C22C9/02
Inventor 陈启峰刘小玲王景新李鹏辉李志刚黄其邓可
Owner CHINA NON-FERROUS METALS PROCESSING TECH CO LTD