A kind of metal alloy material and its use

A metal alloy and multi-purpose technology, applied in metal processing equipment, damage protection, pipeline anticorrosion/rust protection, etc., can solve the problems of high brittleness of porous layer, poor corrosion resistance, and failure to meet the performance requirements of pipe materials, etc., and achieve high boiling transmission Excellent thermal coefficient and corrosion resistance

Active Publication Date: 2016-08-24
北京广厦环能科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, according to its current industrial application, the sintered surface porous tube has the following problems: ① When the sintering temperature is too high, it will affect the mechanical properties of the metal substrate; for the copper-nickel tube substrate, it will especially affect the tube The average grain size of itself; these do not meet the performance requirements of the national standard for pipes; ②When the sintering temperature is low, the bonding force between the porous layer and the base pipe is poor, and it is easy to fall off during use, or too much is added to the porous layer to reduce the Alloying elements at the melting point will lead to greater brittleness or poor corrosion resistance of the porous layer, which is very unfavorable for actual working conditions and the life of the heat exchange tube

Method used

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  • A kind of metal alloy material and its use
  • A kind of metal alloy material and its use
  • A kind of metal alloy material and its use

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Example 1 A copper-nickel alloy surface porous tube with a porosity of the inner porous layer of 45% and a thickness of 0.2 mm was prepared.

[0037] (1) a metal alloy material of CuNi10Zn20Sn10, which is prepared into 100~400 mesh copper alloy metal powder by gas atomization;

[0038] (2) The binder that the powder obtained in step (1) is mixed with 17wt% polyvinyl alcohol particles and 83wt% toluene solution is mixed with a volume ratio of 49% to form a uniform paste coating; Cladding to φ32×2, 150mm long copper-nickel tube 1;

[0039] (3) After the highly volatile substances in it are completely removed, place the pipe in the first section of the continuous sintering furnace filled with hydrogen atmosphere and the furnace temperature is stable at 380°C, and keep it warm for about 30 minutes to remove all the bonding Then, it is sent to the second section of the continuous sintering furnace with a furnace temperature of 900°C by a conveyor belt, and it is kept for ab...

Embodiment 2

[0042] Example 2 Prepare a copper-nickel alloy surface porous tube with a porosity of 40% in the outer porous layer and a thickness of 0.3mm

[0043] (1) a metal alloy material of CuNi5Zn15Sn8, which is prepared into 200~500 mesh copper alloy metal powders by gas atomization;

[0044] (2) The binder that the powder obtained in step (1) is mixed with 29wt% polystyrene particles and 71wt% xylene solution is mixed with a volume ratio of 60% to form a uniform paste coating; then at 200 ° C by spraying Coat it on the outer surface of φ32×3, 300mm long copper-nickel tube;

[0045] (3) After the highly volatile substances in it are completely removed, place the pipe in the first section of the continuous sintering furnace filled with hydrogen atmosphere and the furnace temperature is stable at 350°C, and keep it warm for about 40 minutes to remove all the bonding Then, it is sent to the second section of the continuous sintering furnace with a furnace temperature of 870°C by a conve...

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Abstract

A metal alloy material, which contains 2-10wt% of Ni, 10-20wt% of Zn, 5-10wt% of Sn, the balance of Cu and unavoidable impurities. The material provided by the invention can be used to prepare copper-nickel alloy surface porous tubes. The metal alloy material provided by the invention can make the porous layer on the surface of the porous tube achieve metallurgical bonding with the base tube at a suitable temperature, which can not only avoid damage to the performance of the base tube at an excessively high sintering temperature, but also solve the problem of excessively low sintering temperature. Problems such as poor bonding strength of the porous layer, poor corrosion resistance, and short life occur at the sintering temperature.

Description

technical field [0001] The invention belongs to the field of powder metallurgy materials and relates to a metal alloy material which can be used for preparing copper-nickel alloy surface porous tubes. Background technique [0002] The scale-up of industrial devices has put forward higher requirements for the field of heat exchangers, and the increase in heat exchange capacity and heat exchange area has brought great inconvenience to the layout of heat exchange devices. As a new type of high-efficiency heat exchanger, the surface porous tube heat exchanger bears more and more responsibilities in the field of heat exchange. High attention from domain experts. [0003] The sintered surface porous tube is currently the best surface porous tube for enhancing boiling heat transfer, and has been well used in many oil refining, petrochemical and other equipment; it is a layer of metal sintered on the inner or outer surface of the metal tube. Prepared from powder materials. Howeve...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C9/04F16L58/08
CPCF16L58/08C22C9/02C22C9/04C22C9/06B22F3/1021B22F3/1103B22F5/106B22F1/10
Inventor 韩军侯婷婷刘永超王凤林任淑彬
Owner 北京广厦环能科技股份有限公司
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