Process for effectively controlling core deformation of light titanium alloy plate-fin heat exchanger

A finned heat exchanger, titanium alloy plate technology, applied in the direction of manufacturing tools, metal processing equipment, welding equipment, etc., to achieve the effect of preventing deformation

Inactive Publication Date: 2020-07-28
WUXI POWER HEAT EXCHANGER MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problems existing in the existing process of effectively controlling the deformation of the core of the light-weight titanium alloy plate-fin heat exchanger, the present invention provides a process for effectively controlling the deformation of the core of the light-weight titanium alloy plate-fin heat exchanger

Method used

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  • Process for effectively controlling core deformation of light titanium alloy plate-fin heat exchanger

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Experimental program
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Effect test

Embodiment 1

[0031] The invention provides a process for effectively controlling the core body deformation of a light titanium alloy plate-fin heat exchanger, which includes the following steps:

[0032] 1) fin forming;

[0033] 2) Core assembly: place the assembly core on the shaping fixture plate;

[0034] 3) Vacuum brazing: Put the workpiece into the furnace to evacuate, gradually raise the temperature of the furnace slowly, and keep it warm for 10 minutes. The solder is circulated at low temperature, and then the furnace temperature is slowly lowered to let the solder cool down;

[0035] The height of the fins is 0.04mm higher than the height of the seals, leaving a certain deformation space for the fins, so that it has enough support; the material of the fins is titanium alloy, and the thickness is 0.08mm; the temperature of the low-temperature flow of solder is 880°C.

[0036] Wherein, by weight, the solder includes the following components:

[0037] Ni 35.0; Cr 3.0; B 2.0; Mn 8.0;...

Embodiment 2

[0039] The invention provides a process for effectively controlling the core body deformation of a light titanium alloy plate-fin heat exchanger, which includes the following steps:

[0040] 1) fin forming;

[0041] 2) Core assembly: place the assembly core on the shaping fixture plate;

[0042] 3) Vacuum brazing: Put the workpiece into the furnace to evacuate, gradually raise the temperature of the furnace slowly, and keep it warm for 20 minutes. The solder is circulated at low temperature, and then the furnace temperature is slowly lowered to cool the solder;

[0043] The height of the fins is 0.06mm higher than the height of the seal; leave a certain deformation space for the fins so that it has enough support; the material of the fins is titanium alloy, and the thickness is 0.09mm; the temperature of the low-temperature flow of solder is 890°C.

[0044] In parts by weight, the solder includes the following components:

[0045] Ni 39.0; Cr 5.0; B 3.0; Mn 6.0; Si 8.0; Cu 4...

Embodiment 3

[0047] The invention provides a process for effectively controlling the core body deformation of a light titanium alloy plate-fin heat exchanger, which includes the following steps:

[0048] 1) fin forming;

[0049] 2) Core assembly: place the assembly core on the shaping fixture plate;

[0050] 3) Vacuum brazing: put the workpiece into the furnace to evacuate, gradually raise the temperature of the furnace slowly, and keep it warm for 30 minutes. The solder is circulated at low temperature. The temperature of the solder is 895°C, and then slowly lower the furnace temperature to let the solder cool ;The height of the fins is 0.08mm higher than the height of the seal, leaving a certain deformation space for the fins, so that it has enough support; the material of the fins is titanium alloy, and the thickness is 0.1mm;

[0051] Wherein, by weight, the solder includes the following components:

[0052] Ni 40.0; Cr 6.0; B 4.0; Mn 5.0; Si 10.0; Cu 3.0; Fe 25.0; Mo 3.0; W 2.0; Ta2...

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Abstract

The invention discloses a process for effectively controlling core deformation of a light titanium alloy plate-fin heat exchanger. The process comprises the following steps that 1) fin forming is conducted; (2) core body assembling is conducted, specifically, an assembling core body is placed on a shaping clamp plate; and (3) vacuum brazing is conducted, specifically, a workpiece is put into a furnace to be vacuumized, the furnace temperature is gradually and slowly increased, heat preservation is conducted, low-temperature circulation is conducted on welding flux, and then the furnace temperature is slowly reduced to cool the welding flux. According to the process for effectively controlling the core deformation of the light titanium alloy plate-fin heat exchanger, the height of formed fins is increased, the fin supporting strength in the brazing process is facilitated, and meanwhile, the metal phase change process of a titanium alloy material is reduced through low-temperature brazing, the problems of material deformation and embrittlement are prevented, and the material can keep the properties of the material.

Description

technical field [0001] The invention relates to the field of welding technology, in particular to a process for effectively controlling the core body deformation of a light titanium alloy plate-fin heat exchanger. Background technique [0002] Light-weight titanium alloys are generally used in the aviation field with very strict weight requirements, so the selection of materials is particularly strict, because titanium alloy materials are resistant to high temperature, corrosion resistance, and high strength, but aluminum materials have a lower material strength at a high temperature of 200 °C. The loss is large, so for the heat exchange of high-temperature gas (200-600°C), titanium alloy materials are selected. At the same time, in order to reduce weight, the thickness of conventional titanium alloy fin material will be 0.2mm / 0.17mm / 0.15mm / 0.12mm, but the material thickness of light titanium alloy is 0.1mm / 0.08mm, the thinner the material, the better the supporting force of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K1/008
CPCB23K1/008
Inventor 许旭峰刘政陈飞
Owner WUXI POWER HEAT EXCHANGER MFG
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