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Method for producing red brass pipe

A red brass, manufacturing method technology, applied in the direction of pipes, rigid pipes, pipes/pipe joints/pipe fittings, etc., can solve the problems of small aspect ratio, small size, unsuitability, etc., and achieve uniform and good material properties The effect of uniform support and performance

Inactive Publication Date: 2007-09-26
中铝洛阳铜业有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, in the demand for pipes in the US market, red copper pipes occupy an absolute advantage, and copper water pipes reach 85%, which has a good market prospect; the surface made of this kind has a color similar to copper, and the surface is shiny, non-oxidizing, and uniform in material properties. For red brass pipes with high performance requirements, it is feasible to use industrial electrochemical methods, but this method can only be used for products with small dimensions or small aspect ratios. For pipes with a length of more than 6000mm and an annual output of thousands of For industrialized large-scale production of more than 1 ton, this method is obviously not suitable and economical

Method used

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  • Method for producing red brass pipe
  • Method for producing red brass pipe

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Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0025] Produce a red brass tube with φ88.9×5.56 and H58 state.

[0026] Ingot casting: use a melting furnace to cast an ingot.

[0027] Heating: Use a heating furnace for heating, the heating temperature is 860°C, and the heating time is 2.5 hours.

[0028] Extrusion: Use hydraulic press to extrude and preheat the supporting extrusion cylinder, perforated needle, extrusion pad and extrusion die. The preheating temperature of the extrusion cylinder is 450℃ and the preheating time is 2.5 hours; the preheating temperature of the perforation needle, the extrusion pad and the extrusion die is 400℃, the preheating time is 2.5 hours, the extrusion die is φ115mm, and the perforation needle It is φ100mm; the extrusion temperature is 860°C, the extrusion speed is 30mm / min, and the extrusion ratio is 16.28. Extruded into a tube blank of φ115×7.5mm.

[0029] Sawing: Use a circular saw to cut the head and tail.

[0030] Pickling: Pickling the pipe in the pickling tank. The sulfuric acid concen...

specific Embodiment approach 2

[0039] Produce a red brass tube of φ21.33×2.72mm and O61 state.

[0040] Ingot casting: use a melting furnace to cast an ingot.

[0041] Heating: Use a heating furnace for heating, the heating temperature is 800°C, and the heating time is 1.5 hours.

[0042] Extrusion: Use a hydraulic press to extrude and preheat the matching extrusion cylinder, perforation needle, extrusion pad and extrusion die. The preheating temperature of the extrusion cylinder is 350℃ and the preheating time is 3 hours; the preheating temperature of the perforation needle, the extrusion pad and the extrusion die is 300℃, the preheating time is 3 hours, the extrusion die is φ80mm, and the perforation needle It is φ60mm; the extrusion temperature is 800°C, the extrusion speed is 20mm / min, and the extrusion ratio is 21. It is extruded into a tube blank of φ80×60mm.

[0043] Sawing: Use a circular saw to cut the head and tail.

[0044] Pickling: Pickling the pipe in the pickling tank. The sulfuric acid concentra...

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Abstract

The production process of red brass pipe includes the steps of: fusion casting, heating, extruding, finishing, acid pickling, inspection, rolling, cutting to required size, inspection, annealing, acid pickling, forming head, drawing, finishing, inspection, deoiling, and product annealing. The present invention features that in common pressure processing apparatus, with common brass as material and through extrusion to generate red, acid pickling to increase color, drawing to decrease color, further acid pickling to increase color and annealing to maintain color, red brass pipe with high anticorrosion and homogeneous performance may be produced in low cost.

Description

Technical field: [0001] The invention belongs to non-ferrous metal pressure processing technology. More specifically, it is a method of making red brass tubes. Background technique: [0002] At present, red brass pipes are very popular in the international market. For example, in the pipeline demand of the US market, red copper pipes have an absolute advantage, and copper water pipes reach 85%, which has a good market prospect; the surface of this kind of production has a color similar to copper and the surface is shiny, non-oxidized, and uniform in material properties. For red brass pipes with high performance requirements, industrial electrochemical methods are feasible, but this method can only be used for products with small dimensions or small aspect ratios. For pipes with a length of more than 6000mm and an annual output of 1,000 For large-scale industrial production of more than tons, this method is obviously unsuitable and uneconomical. [0003] At present, the production...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16L9/02B21C23/02C23F14/02C22F1/08
Inventor 王欣太严加伦郭慧稳熊晓明孙德华卢燕陈浩李建涛李振山赵万花秦勇史欣杨海丽雷雨才毅
Owner 中铝洛阳铜业有限责任公司
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