A preparation method of aluminum-stainless steel composite pipe for thermal control of space vehicle

Abstract

The invention belongs to the technical field of a preparation method for a metal composite material and particularly relates to a preparation method for an aluminum-stainless steel composite pipe for thermal control on a spacecraft. According to the method disclosed by the invention, a stress relief metal layer is prepared by adopting a hot isostatic pressing process, and the aluminum-stainless steel composite pipe is prepared by adopting a method of hot-pressing soldering and then hot isostatic pressing treatment. The method disclosed by the invention comprises the following steps: (1) performing modified treatment on the outer surface of a stainless steel pipe; (2) manufacturing the stress relief metal layer; (3) preparing a brazing material; (4) assembling the stainless steel pipe coated with the stress relief layer, an aluminum pipe and the brazing material; (5) performing hot-pressing brazing; (6) performing contour processing and vacuum canning on a brazed part; (7) performing hot isostatic pressing treatment; (8) performing canning removal and contour processing. The aluminum-stainless steel composite pipe manufactured by the method disclosed by the invention has the characteristics of being high in straightness, light, vibration-proof, high in heat-transfer capability and the like, and the thermal environment adaptability and the mechanical vibration mechanics adaptability of the aluminum-stainless steel composite pipe meet the operating requirements of thermal control systems, such as spacecraft flexible heat pipes, single-phase and two-phase liquid heat-transfer loops and expandable thermal radiators.

Description

technical field [0001] The invention belongs to the technical field of preparation methods of metal composite materials, and in particular relates to a preparation method of an aluminum-stainless steel composite pipe for thermal control of space vehicles. Background technique [0002] For the flexible heat pipes, single-phase and two-phase liquid heat transfer circuits, expandable heat radiators and other thermal control systems used in space vehicles, the working medium circulation pipelines and storage containers are made of stainless steel based on considerations of strength and corrosion resistance. material. At the same time, in the area of ​​heat collection (evaporation of heat transfer medium) and heat dissipation (condensation of heat transfer medium), based on the consideration of heat transfer performance and weight, the aluminum material expansion box with light weight, good heat transfer performance and large specific heat capacity is selected in the design. hot...

AI Technical Summary

Problems solved by technology

The disadvantage of this process is that the fixed and constrained aluminum tube and the drawn stainless steel tube cannot produce large deformation, and the large deformation has a great impact on the dimensions and tolerances of the stainless steel tube, such as wall thickness, inner hole roundness, and inner hole coaxiality. have a serious impact

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