Vanadium-containing non-magnetic Ti(C, N)-based metal ceramic and preparation method thereof

Abstract

The invention provides vanadium-containing non-magnetic Ti(C, N)-based metal ceramic and a preparation method thereof, and belongs to metal ceramic and preparation methods. The vanadium-containing non-magnetic Ti(C, N)-based metal ceramic comprises a hard phase and a binding phase, and raw materials are powder and comprise, by weight, 42.11%-53.48% of TiC, 7.91%-9.99% of TiN, 27.78%-32.82% of Ni, 9.30%-15.16% of Mo and 0.50%-1.99% of VC. The metal ceramic is prepared by mixing, wet grinding, drying, compression molding, degreasing and vacuum sintering. The preparation method of the metal ceramic sequentially includes the steps of mixing, wet grinding, drying, compression molding, degreasing and vacuum sintering. The preparation method is simple, low in cost and suitable for industrial production. The prepared metal ceramic is simple in composition and does not contain scarce strategic resource W, the hardness can reach 89 HRA, the bending strength can reach 2673 MPa, the metal ceramic has no magnetism at the room temperature, the relative permeability is not higher than 1.003, the abrasion resistance and the chemical stability are good, and the friction coefficient with materials such as steel is small; and the metal ceramic has good application prospects in the aspects of molding tools and molds for magnetic elements and wear-resistant parts of electronic products and automobile instruments.

Description

technical field [0001] The invention belongs to cermets and a preparation method thereof, in particular to a vanadium-containing nonmagnetic Ti(C, N)-based cermet and a preparation method thereof. Background technique [0002] Since the 1970s, Ti(C,N)-based cermets have excellent properties such as high hardness, low coefficient of friction with metals, good wear resistance and good chemical stability, and have been used in the production of molding tools and wear-resistant parts. It is an ideal material and is widely used as a cutting tool. [0003] Ti(C,N)-based cermets often use Ni, Co or their combination as the metal binder. However, since Ni and Co are ferromagnetic elements, the Ti(C,N)-based cermet tools and molds produced under normal conditions tend to be ferromagnetic at room temperature. However, the existence of ferromagnetism is unfavorable for forming tools and molds in the magnetic material production industry and materials for wear-resistant parts in the e...

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Problems solved by technology

[0004] Publication No. CN 101890476 A, a Chinese patent titled "a non-magnetic cermet mold and its preparation method", discloses a (W,Ti,Ta,Nb)(C,N) solid solution powder, Ni powder, W powder , Cr powder and Mo powder are non-magnetic cermets. Although the non-magnetic cermet has the advantages of hardness and high bending strength, it needs to use high-energy ball milling to pre-solutionize Ni powder, W powder, Cr powder and Mo powder. , high-energy ball milling is easy to introduce impurities such as iron and oxygen, and the amount of pre-solid solution is not easy to control

[0005] Publication number CN 103710603 A, Chinese patent titled "Ti(C,N)-based cermet with non-magnetic gradient structure and its preparation method", discloses a kind of TiC, TiN, Ni, Mo 2 C, WC and Cr 3 C 2 It is a non-magnetic cermet prepared by adding TaC or NbC through ball milling, molding, vacuum degreasing, vacuum sintering and high-temperature isostatic surface nitriding treatment. Although the non-magnetic cermet has excellent wear resistance and impact resistance, but the preparation method is cumbersome and the cost is relatively high