Rapid forming method of internal channel part

Abstract

The invention provides a rapid forming method of an internal channel part, belongs to the field of material forming and manufacture, and can solve the problem of difficulty in forming of the internalchannel part with a complicated structure. The method mainly comprises steps as follows: selection and preparation of early-stage raw materials, powder sintering, hot isostatic pressing and later finishing. The method is an advanced technology which is improved on the basis of the hot isostatic pressing, comprises steps of first powder sintering for blank preparation and later hot isostatic pressing densification, and has the characteristic of rapid formation. The method realizes powder sintering and diffusion bonding simultaneously, has the multiple advantages as follows: formed parts are high in strength and precision, excellent in performance, good in joint interface, short in forming cycle, high in material utilization rate and low in cost, various requirements of the internal channelpart can be met very well, and the method has obvious advantages when applied to formation of the internal channel part with the complicated structure. The method has higher applicability due to designability, can be popularized to other parts with internal characteristics and has good application prospects.

Description

technical field [0001] The invention belongs to the field of material forming and manufacturing, in particular relates to the forming of inner channel parts, and can also be extended and applied to other parts with internal features. Background technique [0002] In the field of aerospace micro-satellite thrusters, due to the integration of pipelines, there is an urgent demand for inner channel parts with highly integrated and complex structures. The inner channel part is a kind of part with complex internal flow channel structure, high strength and precision requirements, and inner channel smoothness, cleanliness, airtightness and other performance requirements. The forming process of material connection after the channel has brought great difficulties to the existing forming technology: the inner channel structure is complex, contained inside the part, its size is small and deep, and conventional machining methods cannot be formed; The method of manufacturing and diffusio...

AI Technical Summary

Problems solved by technology

The inner channel part is a kind of part with complex internal flow channel structure, high strength and precision requirements, and inner channel smoothness, cleanliness, airtightness and other performance requirements. The forming process of material connection after the channel has brought great difficulties to the existing forming technology: the inner channel structure is complex, contained inside the part, its size is small and deep, and conventional machining methods cannot be formed; The method of manufacturing and diffusion welding connection is not only cumbersome in machining, complex in process, and low in precision, but also has air leakage problems due to butt joint errors, which cannot meet the airtightness requirements; there are inevitably powder particles in the inner channel of 3D printed parts, Cannot meet cleanliness requirements, and its cost is high

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