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Wear- and corrosion- proof metal ceramic knife edge material

A technology of corrosion-resistant metals and blades, applied in the field of plastic pelletizing knives, can solve problems such as difficult control, affecting material properties, and deterioration of material properties, achieving durability and service life, good oxidation resistance, and low manufacturing costs Effect

Inactive Publication Date: 2006-06-21
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still many problems in Ti(C,N)-based cermets. For example, Ti(C,N) has poor wettability and is easy to decompose during high-temperature sintering in vacuum, resulting in voids in the prepared cermets, making the material Performance deterioration; the equilibrium nitrogen partial pressure during vacuum sintering is affected by many factors, and it is difficult to control, and there is a certain proportional relationship between the content of C and N in Ti(C, N), and the poor control of N content will easily cause free C to appear , affecting the material properties
[0004] At present, most of the knives used in domestic and foreign petrochemical polyethylene, polypropylene and polyester synthetic resin pellets are made of steel knives or steel-bonded carbide as a whole, and must be quenched before use. The lifespan cannot meet the requirements

Method used

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  • Wear- and corrosion- proof metal ceramic knife edge material
  • Wear- and corrosion- proof metal ceramic knife edge material
  • Wear- and corrosion- proof metal ceramic knife edge material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1: Preparation of wear-resistant and corrosion-resistant cermet blade material:

[0027] 40.0wt.% of Ni powder, 10.0wt.% of Cr powder, 1.0wt% of Al powder, 2.0wt% of Ti powder, and the balance of TiC particles with an average diameter of 3.5μm are mechanically mixed, and after granulation, they are cold-pressed at 120MPa , the vacuum sintering temperature is 1370°C, and the holding time is 30min.

Embodiment 2

[0028] Embodiment 2: Preparation of wear-resistant and corrosion-resistant cermet blade material:

[0029] 40wt.% of Ni powder, 10.0wt% of Cr powder, 1.0wt% of Al powder, 2.0wt% of Ti powder, 0.5wt.% of Mo powder, and the balance is mechanically mixed with TiC particles with an average diameter of 3.5 μm. Formed under cold pressure at 120MPa, vacuum sintering temperature is 1375°C, and holding time is 30min.

Embodiment 3

[0030] Embodiment 3: Preparation of wear-resistant and corrosion-resistant cermet blade material:

[0031] 30wt.% of Ni powder, 6.0wt% of Cr powder, 0.8wt% of Al powder, 1.8wt% of Ti powder, and the balance of TiC particles with an average diameter of 3.5μm are used for mechanical mixing. The sintering temperature is 1375°C, and the holding time is 25 minutes.

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Abstract

Disclosed is an abrasion-proof anticorrosion ceramic metal cutting edge material, which comprises TiC particles as the base stock, Ni powder 25.0-40.0 wt%, Cr powder 6.0-10.0 wt%, a small amount of Al and Ti powder with a total content of no less than 3.0 wt%. The material ahs good wearing resistance, corrosion stability, oxidation resistance and high hot hardness and strength.

Description

Technical field: [0001] The invention relates to cutting tool preparation technology, and in particular provides a preparation technology of wear-resistant and corrosion-resistant cermet blade material, and a plastic pelletizing knife made of the corrosion-resistant and wear-resistant cermet blade material. Background technique: [0002] Compared with WC-Co cemented carbide, TiC-based cermets use TiC particles instead of WC particles as the hard phase, and Ni or NiCr alloys instead of Co as the binder phase. Because the melting point of TiC (3250°C) is higher than that of WC (2630°C), the oxidation resistance of TiC-based cermet is better than that of WC-Co cemented carbide, and the density of TiC is only 1 / 3 of that of WC. Wear-resistant and corrosion-resistant metal-ceramic composite materials are prepared by utilizing their high-temperature properties such as good oxidation resistance, high-temperature strength and wear resistance. In particular, a small amount of Al and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C29/10C22C1/04C22C29/02
Inventor 刘越王全兆毕敬关德慧裴红川
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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