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Production process for lead brass bars

A production process and lead-brass technology, which is applied to the production process of lead-brass bars, can solve problems such as incompatibility with high-speed and precision lathe processing requirements, and achieve the effect of satisfying processing requirements and improving cutting performance.

Active Publication Date: 2016-08-03
安徽鑫科铜业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Ф2.0~6.0mm small size lead brass rod production process: ingot casting-extrusion-disc drawing-well furnace annealing-pickling-combined drawing, although the lead brass rod produced by this process can It meets the processing requirements of medium and low speed automatic lathes. However, with the continuous development of mechanical cutting processing towards automation, high speed and precision, higher requirements are placed on the machinability of materials. In some special processing fields, the products produced by this process Lead brass rods are no longer suitable for the processing requirements of high-speed and precision lathes

Method used

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  • Production process for lead brass bars
  • Production process for lead brass bars
  • Production process for lead brass bars

Examples

Experimental program
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Effect test

Embodiment 1

[0029] A production process of a lead brass bar, the model of the lead brass bar is C3604Φ5mm, and the production process comprises the following steps:

[0030] (1) batching is carried out according to the composition of the C3604 lead brass bar, and the batching is added to the induction furnace for smelting in batches.

[0031] (2) Horizontal continuous casting: copper water is drawn horizontally and continuously from the holding furnace by the mold, the ingot size is Φ120mm, and the pulling speed is 6×10 4 μm / s, traction stroke 7×10 4 μm, stop time 50ms, reverse speed 6×10 4 μm / s, reverse stroke 1×10 4 μm, the stop time is 20ms, the ingot is sawed on a semi-automatic horizontal metal band sawing machine, and the sawing length is 500mm;

[0032] (3) Ingot heating: The ingot is heated at a charging speed of 11 pieces / hour in an intermediate frequency induction heating furnace, heated to a temperature of 620°C, and kept for 0.8 hours;

[0033] (4) Extrusion: The heated in...

Embodiment 2

[0040] A production process of a lead brass bar, the model of the lead brass bar is HPb59-1Φ4.2mm, and the production process comprises the following steps:

[0041] (1) Carry out batching according to the composition of the HPb59-1 lead brass bar, add the batching batches to the induction furnace for smelting, the smelting temperature is 1045 ℃, pour into the holding furnace after all the metal is melted and let stand for 10 minutes;

[0042] (2) Horizontal continuous casting: copper water is continuously drawn horizontally from the holding furnace by the mold, the ingot size is Φ160mm, and the pulling speed is 10×10 4 μm / s, traction stroke 10×10 4 μm, stop time 100ms, reverse speed 10×10 4 μm / s, reverse stroke 5×10 4 μm, the withdrawal time is 80ms, the ingot is sawed on a semi-automatic horizontal metal band sawing machine, and the sawing length is 500mm;

[0043] (3) Ingot heating: The ingot is heated at a charging speed of 10 pieces / hour in an intermediate frequency in...

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Abstract

The invention provides a production process for lead brass bars. According to the production process, the lead brass bars are obtained through the steps of ingot casting, extrusion, jiggering and skin planing, continuous drawing and continuous annealing, and united drawing. Recrystallized grains of the lead brass bars obtained through the production process are fine, alpha phases are divided into relatively isolated small massive structures by numerous fine granular beta phases, and the cutting performance of the lead brass bars is improved.

Description

technical field [0001] The invention relates to a production process of a lead brass rod. Background technique [0002] The reason why lead brass has excellent cutting performance is mainly because the Pb element exists in the form of soft dots in the structure, which cuts off the continuity of the brass matrix, making it easy to break the lead brass bar when it is processed on the lathe. [0003] Ф2.0~6.0mm small size lead brass bar production process: ingot-extrusion-disk drawing-well furnace annealing-pickling-joint drawing, although the lead-brass bar produced by this process can It meets the processing requirements of medium and low-speed automatic lathes, but with the continuous development of mechanical cutting in the direction of automation, high-speed and precision, higher requirements are placed on the machinability of materials. Lead-brass bars are no longer suitable for the processing requirements of high-speed and precision lathes. [0004] The main reason is ...

Claims

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Application Information

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IPC IPC(8): C22F1/08B21C37/04
CPCB21C37/04C22F1/08
Inventor 叶东皇罗继华
Owner 安徽鑫科铜业有限公司