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High-strength high-wear-resistance metal ceramic and preparation method thereof

A cermet, high wear-resistant technology, applied in metal processing equipment, transportation and packaging, etc., can solve the problems of poor composition uniformity, low density, poor mechanical properties, etc., achieve long service life, reduce volatilization, strength and the effect of improving the wear resistance

Active Publication Date: 2019-08-09
ZHUZHOU XINRONGLI IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for preparing high-strength and high-wear-resistant cermets, aiming to solve the technical problems of low density, poor composition uniformity and poor mechanical properties in the sintering process of TiC-based cermet materials in the prior art

Method used

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  • High-strength high-wear-resistance metal ceramic and preparation method thereof
  • High-strength high-wear-resistance metal ceramic and preparation method thereof
  • High-strength high-wear-resistance metal ceramic and preparation method thereof

Examples

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Embodiment 1

[0044] This embodiment provides a method for preparing a high-strength and high-wear-resistant cermet, comprising the following steps:

[0045] S1. Ball milling treatment: Accurately weigh 980g of TiC-based ceramic powder and 20g of PVB, add absolute ethanol as a ball milling medium, and use a planetary ball mill to mix the raw materials evenly to obtain a mixture; wherein, the process parameters of ball milling treatment are: the speed is 80r / min, ball milling time is 24h;

[0046] S2. Granulation: use the spray granulation method to granulate the mixture obtained in step S1. During the granulation process, the temperature at the inlet is 180°C, the temperature at the outlet is 50°C, and the rotation speed of the atomizer is 5500r / min , to obtain a granulated material with a particle size of 20 μm;

[0047] S3. The first sintering treatment: put the granulated material in step S2 into a graphite mold with a diameter of 100mm, and place it in an oscillating hot-pressing sint...

Embodiment 2

[0051] This example provides a method for preparing high-strength and high-wear-resistant cermets. Referring to the operation steps of Example 1, the difference from Example 1 is that in step S1, 950 g of TiC-based ceramic powder and 50 g of PVB are accurately weighed. ; Among them, the particle size of the TiC-based ceramic powder is 0.5 μm, including the following mass fractions of each element: Ti: 40wt.%, C: 25wt.%, W: 15wt.%, Co: 10wt.%, Nb: 1wt. %, Ni: 8wt.%, Ta: 1wt.%, the molecular weight of PVB is 100,000; the process parameters of ball milling treatment are: the rotating speed is 100r / min, and the ball milling time is 12h.

Embodiment 3

[0053] This embodiment provides a method for preparing high-strength and high-wear-resistant cermets. Referring to the operation steps of Example 1, the difference from Example 1 is that in step S1, 960 g of TiC-based ceramic powder and 40 g of PVB are accurately weighed. ; Among them, the particle size of TiC-based ceramic powder is 1 μm, including the following elements in mass fraction: Ti: 45wt.%, C: 25wt.%, W: 14wt.%, Co: 5wt.%, Nb: 4wt.% , Ni: 5wt.%, Ta: 2wt.%, the molecular weight of PVB is 50000; the technological parameters of ball milling treatment are: rotating speed is 60r / min, ball milling time is 20h.

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Abstract

The invention provides a preparation method of high-strength high-wear-resistance metal ceramic. The preparation method comprises the following steps of S1, ball-milling treatment; S2, granulation; S3, first-time sintering treatment; and S4, secondary sintering treatment, wherein in the first sintering treatment process, a traditional vacuum sintering technology is combined with an oscillating hot-pressing sintering technology for treatment. According to the method, powder is pre-sintered at lower temperature by adopting an oscillating pressure sintering technology, the oscillation pressure can promote particle rearrangement and viscous flow of a high-viscosity binding phase, pressure is applied during a sintering process, the sintering temperature adopted is low, the viscosity of a liquidphase is large, so that the liquid phase can be effectively prevented from being extruded from a sample; and the strength of the pre-sintered blank body which is obtained by adopting the method and tight in particle stacking is low, so that the blink body is convenient to process into a specific shape.

Description

technical field [0001] The invention belongs to the technical field of high-performance ceramic preparation, and in particular relates to a high-strength and high-wear-resistant cermet and a preparation method thereof. Background technique [0002] TiC-based cermet materials have the characteristics of high strength, high hardness, and good wear resistance. The knives made of cermets are not easy to stick to the knife during cutting, which can ensure the processing quality of the workpiece and have broad application prospects in the industrial field. However, as a strong covalent bond compound, TiC faces the characteristics of high sintering temperature and poor toughness. In order to improve the above properties, metal cobalt and metal nickel are usually added to the TiC cermet as a binder phase to reduce the sintering temperature, and Mo 2 C, WC, TaC, NbC, VC and other carbides improve wetting, refine grains and improve performance. [0003] At present, the traditional s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00B22F9/04B22F9/08B22F3/14C22C29/10C22C1/04C22C1/10
CPCB22F9/04B22F9/082B22F3/14C22C29/067C22C29/10C22C1/10B22F2009/043B22F2999/00B22F1/10B22F2201/20
Inventor 盛利文安迪谢志鹏戴金宁盛建华
Owner ZHUZHOU XINRONGLI IND
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