Non-magnetic Ti(C, N) base cermet with gradient structure and preparation method thereof

Abstract

The invention provides a non-magnetic Ti(C, N) base cermet with a gradient structure and a preparation method thereof, belonging to Ti(C, N) base cermets and solving the problem of contradictions between strong toughness and no magnetism of existing Ti(C, N) base cermets, so that the Ti(C, N) base cermet simultaneously has strong toughness and no magnetism. The non-magnetic Ti(C, N) base cermet with the gradient structure is prepared by using TiC, TiN, Ni, Mo2C, WC and Cr3C2 powder as the raw materials and carrying out ball-milling and mixing, die forming, vacuum degreasing, vacuum sintering and hot isostatic pressing surface nitriding. The non-magnetic Ti(C, N) base cermet has good wear resistance, red hardness, impact resistance and chemical stability, has low coefficients of friction with the materials such as iron and steel, silicon carbide and the like, has bending strength not less than 1800MPa, core matrix hardness of 86.0-92.5HRA and surface hardening layer Vickers microhardness of 1800-2050kg / mm<2>, is especially suitable for manufacturing non-magnetic cutting tools, non-magnetic dies and non-magnetic wear-resistant parts, has widened application range and has good popularization and application prospects in the industries such as tools and dies, national defences, military projects and the like.

Description

technical field [0001] The invention belongs to Ti(C,N)-based cermets, in particular to a Ti(C,N)-based cermet with a non-magnetic gradient structure and a preparation method thereof. Background technique [0002] With the rapid development of industries such as aerospace, national defense and military industry, communications, machinery, and energy equipment, the performance requirements for magnetic components are constantly improving. Using non-magnetic, wear-resistant molds for molding or tool cutting processing, forming resistance, The cutting resistance is small, which can ensure the consistency of the electromagnetic characteristics of the magnetic components and the processing quality and efficiency. Another example is that if wear-resistant parts such as mechanical seal rings on ships and other equipment are non-magnetic, the lightning protection performance of the equipment can be improved, which is conducive to magnetic stealth. [0003] The non-magnetic material...

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Problems solved by technology

[0005] The invention provides a Ti(C,N)-based cermet with a non-magnetic gradient structure and a preparation method thereof, which solves the contradiction between the strength, toughness and non-magnetism existing in the existing Ti(C,N)-based cermet , so that Ti(C,N)-based cermets have high strength and toughness while being non-magnetic

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