A brazing connection method of rhenium-carbon/carbon composite material and niobium

A carbon composite material and connection method technology, which is applied in the direction of welding/cutting media/materials, welding/welding/cutting items, welding equipment, etc., can solve the problem that solder cannot realize brazing connection of rhenium and niobium, is prone to cracking, and has low bonding strength Low-level problems, to achieve the effect of improving high-temperature mechanical properties, high miscibility, and high tensile strength

Active Publication Date: 2021-08-10
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Among them, the connection between carbon / carbon composite materials and metal niobium is generally adopted by brazing, and the brazing material is usually a mixture of Ti and Ni. The bonding strength of metal niobium and carbon / carbon composites after welding is low, and this Solder cannot realize the brazing connection of rhenium and niobium; at present, electron beam welding and other fusion welding methods are generally used for rhenium and niobium connection. Due to the existence of a large number of brittle phases in the joint after welding, many cracks appear after welding, which is very easy to crack. Makes electron beam welding of rhenium and niobium very problematic

Method used

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  • A brazing connection method of rhenium-carbon/carbon composite material and niobium
  • A brazing connection method of rhenium-carbon/carbon composite material and niobium
  • A brazing connection method of rhenium-carbon/carbon composite material and niobium

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Embodiment 1

[0051] like figure 1 As shown, the embodiment of the present invention provides a brazing connection method of rhenium-carbon / carbon composite material and niobium, wherein the matrix is ​​formed by pairing carbon / carbon composite material block and rhenium metal block, and the method specifically includes the following step:

[0052] 1. Brazing material configuration

[0053] Weigh the metal powder according to the following atomic mole fraction, and the particle size of the powder is 300 mesh:

[0054] Ti45%, Ni45%, Nb10%;

[0055] Pour the weighed powder into a ball mill jar equipped with agate balls, place the ball mill jar on a ball mill for ball milling for 2-3 hours; obtain the brazing filler metal for use;

[0056] 2. Brazing

[0057] Place the niobium metal plate horizontally, lay a layer of brazing material with a thickness of 0.3mm on its upper surface, and then place the carbon / carbon composite material block and the rhenium metal block on the brazing material ...

Embodiment 2

[0062] The embodiment of the present invention provides a brazing connection method of rhenium-carbon / carbon composite material and niobium, which specifically includes the following steps:

[0063] 1. Brazing material configuration

[0064] Polish the Ti foil, Ni foil and Nb foil with a thickness of 100 μm through 600-mesh sandpaper to remove the surface oxide film;

[0065] The metal foil after removing the surface oxide film is taken according to the following atomic mole fraction, and the initial thickness of the foil is 100 μm:

[0066] Ti 25%, Ni 45%, Nb 30%; finally take the Ti1 layer, Ni 2 layer, Nb2 layer, stack each foil in the order of Ti-Ni-Nb-Ni-Nb, and press it to 0.3 at 80°C mm thick, and then cut it to be consistent with the shape of the butt joint surface to obtain the brazing material to be laid;

[0067] 2. Brazing

[0068] placing the niobium metal plate horizontally, laying the solder to be laid on its upper surface, and then laying the carbon / carbon co...

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Abstract

The invention relates to a brazing connection method of rhenium-carbon / carbon composite material and niobium, which belongs to the field of welding technology. The method uses a ternary solder to braze the substrate and the niobium material, the ternary solder is formed by mixing Ti, Ni, and Nb, wherein the atomic mole fraction of Nb is ≤30%, and the The welding surface of the matrix includes rhenium material and carbon / carbon composite material. The invention improves the high-temperature mechanical properties of the welded joint and avoids the generation of Re-Nb brittle phase, thereby obtaining the tensile strength at room temperature and high temperature (1200°C) environment High, high temperature resistant and not easy to crack welded joints.

Description

technical field [0001] The invention relates to a brazing connection method of rhenium-carbon / carbon composite material and niobium, which belongs to the field of welding technology. Background technique [0002] Rhenium iridium-carbon / carbon composite engine thrust chamber, carbon / carbon composite material as base material, rhenium as inner lining, iridium as coating, among which refractory metal rhenium has good high-temperature mechanical properties, suitable for ultra-high temperature and strong thermal shock environmental use. Niobium and niobium alloys are commonly used high-temperature matrix structure materials, and the working temperature is not higher than 1500°C. They are used as tail nozzle materials or nested transition ring materials in rhenium-iridium engines. When applying, it is necessary to combine the rhenium-carbon-carbon composite material matrix with niobium alloy for welding. [0003] Among them, the connection between carbon / carbon composite materia...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K1/00B23K1/20B23K35/32B23K35/30B23K103/18
CPCB23K1/0008B23K1/20B23K35/3033B23K35/325B23K2103/18
Inventor 李夏明徐方涛闫旭波张绪虎
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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