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Cermet material for high-strength mold and preparation method of cermet material

A cermet, high-strength technology, applied in the field of cermet materials, can solve problems such as poor high-temperature fluidity, reduced strength of pure metal, and high brittleness, and achieve the effect of improving compressive and impact resistance, compressive strength and impact toughness

Inactive Publication Date: 2016-07-06
SUZHOU NETABHAPE COMPOSITE MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Pure metals are easily oxidized at high temperatures and their strength is greatly reduced
Ceramics can withstand high temperature and corrosion, but are brittle, have low electrical conductivity, and poor fluidity at high temperatures.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Weigh 13 parts by weight of magnesium oxide, 12 parts of tungsten boride, 16 parts of molybdenum boride, 6 parts of nickel silicide, 10 parts of titanium silicide, 8 parts of silicon nitride, 7 parts of cobalt silicide, ferrochromium nitride 2 parts, 6 parts of nickel, 5 parts of vanadium, and 2 parts of iron are mixed in a large mixing tank, and the rotation speed of the mixing tank is 150rpm;

[0039] (2) Mill the mixed material in a ball mill for 3 hours, and the ratio of ball to material in the ball mill is 35:1;

[0040] (3) Take the cermet material out of the ball mill, then heat up and sinter in the sintering furnace, raise the temperature to 940°C at a rate of 80°C / min, keep it warm for 2 hours, and then keep the heating rate constant and raise the temperature to 1350°C ℃, keep it warm for 2 hours, and lower it to room temperature. It is a cermet material for high-strength molds.

Embodiment 2

[0042] (1) Weigh 5 parts by weight of magnesium oxide, 20 parts of tungsten boride, 10 parts of molybdenum boride, 15 parts of nickel silicide, 5 parts of titanium silicide, 4 parts of silicon nitride, 3 parts of cobalt silicide, ferrochromium nitride 5 parts, 2 parts of nickel, 2 parts of vanadium, 4 parts of iron, mixed in a large mixing tank, the speed of the mixing tank is 50rpm;

[0043] (2) Mill the mixed material in a ball mill for 1 hour, and the ball-to-material ratio in the ball mill is 20:1;

[0044] (3) Take the cermet material out of the ball mill, then heat up and sinter in the sintering furnace, raise the temperature to 880°C at a rate of 40°C / min, keep it warm for 1 hour, and then keep the heating rate constant and raise the temperature to 1250°C ℃, keep it warm for 3 hours, and lower it to room temperature. It is a cermet material for high-strength molds.

Embodiment 3

[0046] (1) Weigh 11 parts of magnesium oxide, 18 parts of tungsten boride, 15 parts of molybdenum boride, 8 parts of nickel silicide, 9 parts of titanium silicide, 5 parts of silicon nitride, 4 parts of cobalt silicide, ferrochrome nitride 4 parts, 3 parts of nickel, 4 parts of vanadium, and 3 parts of iron are mixed in a large mixing tank, and the rotation speed of the mixing tank is 150rpm;

[0047] (2) Mill the mixed material in a ball mill for 3 hours, and the ratio of ball to material in the ball mill is 35:1;

[0048] (3) Take the cermet material out of the ball mill, then heat up and sinter in the sintering furnace, raise the temperature to 940°C at a rate of 80°C / min, keep it warm for 2 hours, and then keep the heating rate constant and raise the temperature to 1350°C ℃, keep it warm for 2 hours, and lower it to room temperature. It is a cermet material for high-strength molds.

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Abstract

The invention discloses a cermet material for a high-strength mold and a preparation method of the cermet material. The cermet material is prepared from the following materials in parts by weight: 5-13 parts of magnesium oxide, 12-20 parts of tungsten boride, 10-16 parts of molybdenum boride, 6-15 parts of nickel silicide, 5-10 parts of titanium silicide, 4-8 parts of silicon nitride, 3-7 parts of cobalt silicide, 2-5 parts of nitridedferrochrome, 2-6 parts of nickel, 2-5 parts of vanadium and 2-4 parts of iron. The preparation method comprises the following steps: (1) weighing according to the weight parts, and mixing in a large mixing and stirring tank; (2) ball milling the materials after being mixed in a ball mill for 1-3h, wherein the ratio of grinding media to material in the ball mill is 20: (1-35): 1; and (3) taking the cermet material out of the ball mill, and sintering in a sintering furnace by raising the temperature to prepare the cermet material for the high-strength mold. The prepared cermet material is good in compression and shock resistances.

Description

technical field [0001] The invention belongs to the field of cermet materials, and relates to a cermet material for high-strength molds and a preparation method thereof. Background technique [0002] Cermets can be classified into oxide-based cermets, carbide-based cermets, nitride-based cermets, and boride-based cermets. Since the tiny ceramic particles are evenly distributed in the continuous metal phase, a continuous film is formed to wrap the dispersed and uniformly distributed ceramic particles, resulting in the cermet having both the characteristics of metal and ceramic, both through the excellent plasticity of metal , The thermal conductivity improves the ability of the material to withstand mechanical and thermal stress, and the ceramic phase strengthens the metal matrix to obtain higher strength and hardness of the material. Pure metals are easily oxidized at high temperatures and their strength is greatly reduced. Ceramics are resistant to high temperature and co...

Claims

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Application Information

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IPC IPC(8): C22C29/00C22C1/05
CPCC22C1/051C22C29/00
Inventor 刘莉王爽邱晶
Owner SUZHOU NETABHAPE COMPOSITE MATERIALS
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