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Production process of brass strip low in earing ratio

A production process, the technology of brass strip, is applied in the field of production process of brass strip with low earing rate, which can solve the problems of earing of blanks, etc., increase the number of hot rolling processing passes, excellent quality, and eliminate earing at the edge The effect of the phenomenon

Inactive Publication Date: 2019-06-07
JIANGXI KAIAN INTELLIGENT LTD BY SHARE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the H62 brass strip is produced by the traditional process, the edge of the billet is prone to earing phenomenon when the billet is opened in the blooming mill. Therefore, the present invention proposes an application for this problem.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A kind of production technology of brass strip with low lug rate, comprises the following steps:

[0037] S1: Ingot heating: smelt electrolytic copper and 30% zinc ingots with a mass percentage of 70% respectively, and then cast them to obtain brass ingots. Put the brass ingots into a walking furnace for heating. The heating method adopts two Stage heating, first stage: 650°C, heat preservation for 2 hours, second stage: 750°C, heat preservation for 2 hours, to obtain ingot;

[0038] S2: hot rolling; use a hot rolling mill to carry out billet hot rolling on the heated ingot, and then mill the strip after hot rolling. The milling surface is processed by double-sided milling. The processing thickness is 14.5mm, and the thickness tolerance is ±0.1mm.

[0039] S3: cold rolling; use the rough rolling mill to cold-roll the strip blank after face milling, the cold-rolled blank adopts 6 passes of rolling, and the final rolling thickness of 6 passes is in order: 14.5mm~10.9mm~8...

Embodiment 2

[0046] A kind of production technology of brass strip with low lug rate, comprises the following steps:

[0047] S1: Ingot heating: Melt electrolytic copper and 20% zinc ingots with a mass percentage of 80% respectively, and then cast them to obtain brass ingots. Put the brass ingots into a walking furnace for heating. The heating method adopts two methods: Stage heating, first stage: 650°C, heat preservation for 2 hours, second stage: 750°C, heat preservation for 2 hours, to obtain ingot;

[0048] S2: hot rolling; use a hot rolling mill to carry out billet hot rolling on the heated ingot, and then mill the hot-rolled billet. The milling surface is processed by double-sided milling. The processing thickness is 14.5mm, and the thickness tolerance is ±0.1mm.

[0049] S3: cold rolling; use the rough rolling mill to cold-roll the strip blank after face milling, the cold-rolled blank is rolled by 5 passes, and the final rolling thickness of the 5 passes is sequentially: 14.5mm~11....

Embodiment 3

[0056] A kind of production technology of brass strip with low lug rate, comprises the following steps:

[0057] Step S0: pretreatment, soaking the electrolytic copper in 6% weak acid solution for 1-3 hours, washing with water, and then preheating, the preheating temperature is 280-330°C.

[0058] S1: Ingot heating: smelt electrolytic copper and 30% zinc ingots with a mass percentage of 70% respectively, and then cast them to obtain brass ingots. Put the brass ingots into a walking furnace for heating. The heating method adopts two Stage heating, first stage: 650°C, heat preservation for 2 hours, second stage: 750°C, heat preservation for 2 hours, to obtain ingot;

[0059] S2: hot rolling; use a hot rolling mill to carry out billet hot rolling on the heated ingot, and then mill the strip after hot rolling. The milling surface is processed by double-sided milling. The processing thickness is 14.5mm, and the thickness tolerance is ±0.1mm.

[0060] S3: cold rolling; use the rou...

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Abstract

The invention discloses a production process of a brass strip low in earing ratio, and relates to the technical field of brass material processing. The production process comprises the following processing steps of ingot casting heating, hot rolling, cold rolling, annealing, cleaning, finish rolling and shear forming. According to the production process, the sintering temperature of a stepping furnace is reduced, the hot rolling and cold rolling processing pass is increased, and the edge earing phenomenon during cogging of a blooming mill can be completely eradicated; and the method is simple,and the product quality is high.

Description

technical field [0001] The invention relates to the technical field of copper material processing, in particular to a production process of a brass strip with a low lug rate. Background technique [0002] Brass strip is an alloy composed of copper and zinc. It can be used in electrical appliances, steam construction and chemical industry, especially terminal printed electrical circuit boards, copper strips for wire shielding, air cushions, and busbar terminals. Electromagnetic switch, pen holder, roof board, etc. There are many grades of brass, including H59, H62, H65, H68 brass strips, etc. Among them, H62 brass has good mechanical properties, good plasticity in hot state, plasticity in cold state, good machinability, and easy brazing Welding and welding, corrosion resistance, but prone to corrosion cracking. In addition, the price is cheap, and it is a common brass variety used by repeat offenders. Used in all kinds of deep drawing and bending manufacturing gift parts, ...

Claims

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Application Information

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IPC IPC(8): C22C1/02C22C9/04C22F1/08B21C37/04
Inventor 李泽关仿叶梓建江荣水
Owner JIANGXI KAIAN INTELLIGENT LTD BY SHARE CO LTD
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