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Processing technique for corrosion resistant brass alloy material for plate heat exchanger

A plate heat exchanger and processing technology, applied in the field of non-ferrous metal processing, can solve the problems of high cost, difficult processing, high chloride ion corrosion resistance, etc., and achieve low cost, good deep drawing performance, and easy to control the processing process. Effect

Active Publication Date: 2009-02-25
中铝洛阳铜加工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Most of the alloy materials used before are stainless steel, pure titanium, nickel and nickel alloy materials, all of which have defects such as high cost, difficult processing, and resistance to high chloride ion corrosion

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1: Corrosion-resistant brass alloy coils for plate heat exchangers of 0.4×300×500mm

[0031] Using power frequency cored induction furnace for smelting, the ingredients are proportioned according to weight percentage: Cu79%, Al3.5%, Ni1.5%, B0.015%, As0.1%, the balance of Zn, the total amount of impurities 0.3% And rare earth additive Ce0.05%. Feeding sequence: adding Zn ingot, Al ingot, Cu—Ni, Cu—B, Cu—As and other master alloys and rare earth additive Ce, melting temperature: 1050°C. Casting adopts vertical semi-continuous casting, casting speed: 3.5m / h, crystallizer cooling water pressure: 0.05MPa; heating: use walking heating furnace for ingot heating, heating temperature: 750℃, heating time 3 hours; annealing Divided into: intermediate annealing and finished product annealing, heating temperature used in intermediate annealing: 400°C, holding time: 4 hours; heating temperature used in finished annealing: 500°C, holding time: 3 hours; pre-finishing rolling,...

Embodiment 2

[0032] Example 2: 8.5×1000×3000mm corrosion-resistant brass alloy strip for plate heat exchanger

[0033] Using power frequency cored induction furnace for smelting, ingredients are proportioned according to weight percentage: Cu: 76%, Al: 1.0%, Ni: 0.3%, B: 0.002%, As: 0.01%, balance: Zn, total impurities Quantity: 0.3%, feeding order: add Zn ingot, Al ingot, Cu—Ni, Cu—B, Cu—As and other intermediate alloys, melting temperature: 1250°C. Casting adopts vertical semi-continuous casting, casting speed: 6m / h, crystallizer cooling water pressure: 0.35MPa; heating: use walking heating furnace for ingot heating, heating temperature: 950℃, heating time 6 hours; For: intermediate annealing and finished product annealing, heating temperature used in intermediate annealing: 650°C, holding time: 10 hours; heating temperature used in finished product annealing: 750°C, holding time: 6 hours; pre-finishing rolling, finishing rolling: adopted processing rate : 70%.

[0034] To sum up: Hot ...

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Abstract

A corrosion-proof brass band for plate heat exchanger and its production are both disclosed herewith. It contains (wt%): Cn 76-79, Al 1.0-3.5, Ni 0.3-1.5, B 0.002-0.015, As 0.01-0.1, Ce 0.05-0.2, and balanced with Zn, and with impurity not more than 0.3. It is produced by: weighing, smelting, casting, hot rolling, end-surface milling, primary rolling, inter-annealing, cold rolling, inter-annealing, edge cutting, pre-rolling, inter-rolling, fine rolling, final annealing, surface treating, cutting, and packing. It is of size (0.4-8.5mm)X(300-1000mm)X(500-3000mm), performance of Rm not less than 410MPa, A11.3 not less than 40%, Hv1 not less than 90, grain 0.010-0.030mm, and Ra larger than 0.2um without scratches.

Description

technical field [0001] The invention belongs to the technical field of nonferrous metal processing, and in particular relates to a processing technology of corrosion-resistant brass alloy materials for plate heat exchangers. Background technique [0002] At present, the plate heat exchanger (PHE) has become an efficient and compact heat exchange equipment, and is widely used in industrial heat exchange fields, such as seawater desalination, coastal aquaculture, geothermal, urban sewage treatment, etc. In addition, due to the harsh working environment of the washing machine, the key internal materials are required to have good corrosion resistance while maintaining a certain strength and wear resistance. Most of the alloy materials used before are stainless steel, pure titanium, nickel and nickel alloy materials, all of which have defects such as high cost, difficult processing, and resistance to high chloride ion corrosion. Contents of the invention [0003] In order to s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C9/04C22C1/02C22C1/06B22D21/00C22F1/08
Inventor 娄花芬马可定黄国兴叶成效高双玲路俊攀蒋长乐陈少华刘富良韩卫光
Owner 中铝洛阳铜加工有限公司
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