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Cupronickel condensation tube production process using disk stretch

A process method and technology of condensing tubes, which are applied in the field of making cupronickel condensing tubes by coil drawing, can solve the problems of increased number of stretching passes, tedious process, unsatisfactory and other problems, so as to reduce the process of process, reduce production cost and improve production efficiency Effect

Inactive Publication Date: 2006-04-05
LUOYANG COPPER PROCESSING GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing production process is relatively complicated
Extrusion uses no water seal extrusion, and pickling must be used after extrusion to remove the scale generated on the surface of the tube billet. In addition, after rolling, due to the limitation of subsequent equipment, the rolled material must be cut to length for supply. Straight stretching machine stretches, and in the stretching process, each straight strip and each pass needs to repeat the head and stretch, that is, after each stretch to a standard straight strip, it needs to be headed again, Stretching to the next standard straight strip, especially the small-diameter cupronickel condenser tube, the process is more complicated due to the increase in the number of stretching passes, and only straight condenser tubes ≤ 18M can be produced, and the handling is increased Therefore, the efficiency of the existing production process is extremely low, and it is far from meeting the market's development needs for longer length and higher precision for white copper condenser tubes.

Method used

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  • Cupronickel condensation tube production process using disk stretch

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A soft-state B 10-axis roll-shaped nickel-copper condenser tube, specification: φ10×0.6mm, average outer diameter allowable deviation ±0.05mm, wall thickness allowable deviation ±0.05mm, Rp 0.2: 90~105Mpa, Rm≥290Mpa, A≥ 30%, the coil weight is 80-120Kg / roll, and the defect points are less than 5 points per roll.

[0018] 1. Melting and casting: casting into ingots with a specification of φ245mm. Use a coreless induction furnace for melting, casting temperature: 1250°C, casting speed: 2.5m / h, and its chemical composition complies with GB5234-2001.

[0019] 2. Extrusion: Extruded into a tube blank of φ80×10mm. Extrusion is carried out with an extruder and a matching mandrel, and the water seal peeling method is adopted in the extrusion process; the heated ingot is pushed into the extrusion barrel of the extruder, and the extruded ingot is extruded by the extrusion shaft and flows out through the mold outlet, and the mold The outlet is connected to a water tank full of w...

Embodiment 2

[0028] A hard B 10 straight white copper condenser tube, specification φ6.35×0.51mm, tolerance tolerance of outer diameter ±0.051mm, tolerance tolerance of wall thickness ±0.038mm, Rp0.5>240Mpa, Rm>310Mpa, straight Degree <12mm / 3000mm.

[0029] 1. Melting and casting: casting into ingots with a specification of φ245mm. Use a coreless induction furnace for melting, casting temperature: 1285°C, casting speed: 3m / h, and its chemical composition complies with GB5234-2001.

[0030]2. Extrusion: Extruded into a tube blank of φ80×10mm. Use extruder and supporting mandrel to extrude, adopt the mode of water seal peeling in the extruding process, with embodiment 1. The heating temperature of the extrusion process: 960°C, the extrusion speed: 42mm / s, the extrusion ratio: 21, and the excess thickness: 32mm.

[0031] 3. Sawing: Use a sawing machine to cut off the head and tail.

[0032] 4. Straightening: Use horizontal straightening to straighten.

[0033] 5. Rolling: use a pipe roll...

Embodiment 3

[0038] A soft-state B 10 mosquito-repellent coil-shaped cupronickel condenser tube, specification φ6.35×0.51mm, tolerance tolerance of outer diameter ±0.051mm, tolerance tolerance of wall thickness ±0.038mm, Rp0.2: 90~105Mpa, Rm>290Mpa, A≥30%, the length of the mosquito coil is 15mm, and the allowable deviation of the length is 0-300mm.

[0039] 1. Melting and casting: casting into ingots with a specification of φ245mm. Use a coreless induction furnace for melting, casting temperature: 1320°C, casting speed: 3.5m / h, and its chemical composition complies with GB5234-2001.

[0040] 2. Extrusion: Extruded into a tube blank of φ80×10mm. Use extruder and supporting mandrel to extrude, adopt the mode of water seal peeling in the extruding process, with embodiment 1. Heating temperature of the extrusion process: 1000°C, extrusion speed: 50mm / s, extrusion ratio: 21, excess thickness: 40mm.

[0041] 3. Sawing: Use a sawing machine to cut off the head and tail.

[0042] 4. Straighte...

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Abstract

This invention provides one process method by use of disc for ambrose alloy cold-finger, which comprises the following steps: melting to cutting to crushing to cutting to correction to grinding or rolling again to annealing to packing, wherein, the pulling process adopts multiple channel disc with pulling parameters in 1.30-1.45 and in and out mode oil moving viscosity of 400-900mm2 / s(40 DEG C) m wherein, Pulling mode angle of 9 degree-12 degree; motive core tamper degree of 6 degree -9 degree; pulling mode and motive core angle difference of 1 degree-3 degree.This invention adopts disc pulling process method to realize the continuous pulling to improve production rate to satisfy the market length need.

Description

Technical field [0001] The invention relates to the technical field of non-ferrous metal material processing, and mainly proposes a process method for making a cupronickel condenser tube by coil drawing. Background technique [0002] The white copper condenser product is a copper-nickel alloy, which is called white copper because of its white color. Because of its good corrosion resistance and seawater resistance, and stable chemical composition, it is widely used in heat exchangers for thermal power and atomic power generation and marine condensers, water supply heaters, distillers, oil coolers, and distilled water devices. The market prospect is very broad, and the supply of products is in short supply. [0003] The usual production process of the existing copper-nickel condensing tube adopts: melting and casting → sawing → extrusion → sawing → pickling → rolling → sawing to length → straight stretching (middle pass) → length → sawing → Eddy current flaw detection→anneal...

Claims

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Application Information

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IPC IPC(8): B23P13/00
Inventor 李宏磊聂小戈余晓刚苗国伟刘建民熊晓明温正陈炬王强杜宏伟帖建华符振东涂海波
Owner LUOYANG COPPER PROCESSING GROUP
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