Preparation method of anti-high-temperature-oxidation crystal whisker modified Ti(C,N) base composite metal ceramic

A high-temperature oxidation-resistant and composite metal technology, which is applied in the field of high-speed cutting tool materials, can solve the problems of poor chemical stability of SiC whiskers and TiC whiskers, reduced tool strength and hardness, etc., to improve high-temperature oxidation resistance , Improve the effect of strength, toughness and dense structure distribution

Inactive Publication Date: 2017-12-29
TAIZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during high-temperature cutting, the chemical stability of SiC whiskers and TiC whiskers is not good, and Fe in the workpiece and O in the air are easy to form at high temperatures. 2 Reaction occurs, resulting in a decrease in the strength and hardness of the tool

Method used

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  • Preparation method of anti-high-temperature-oxidation crystal whisker modified Ti(C,N) base composite metal ceramic
  • Preparation method of anti-high-temperature-oxidation crystal whisker modified Ti(C,N) base composite metal ceramic

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Effect test

Embodiment 1

[0030] A method for preparing a high-temperature oxidation-resistant whisker-modified Ti(C,N)-based composite cermet according to this embodiment includes the following steps:

[0031] (1) Take Ti(C 0.5 N 0.5 ):60g, ZrO 2 Whiskers: 10g, WC: 15g, Co: 5g, Mo 2 C: 5g, Ni: 5g, put in a ball mill jar, add 800g of cemented carbide balls and 100ml of absolute ethanol; control the speed of ball milling on the jar ball mill at 300r / min for 24h, pour it out and place it at 85±5°C Dry in an oven, grind the dried powder, spray granulate, and pass through a 200-mesh sieve for use. The above ZrO 2 Whiskers choose high-strength ZrO 2 Whiskers, the whisker diameter is between 50 and 300nm, and the aspect ratio is between 1:8 and 1:15.

[0032] (2) According to the shape of the tool, take the appropriate amount of powder above, place it in an alloy abrasive tool and dry press it at 200MPa, and then place it in a vacuum hot-press furnace for sintering, with a vacuum degree of ≤1.0Pa. The...

Embodiment 2

[0035] A method for preparing a high-temperature oxidation-resistant whisker-modified Ti(C,N)-based composite cermet according to this embodiment includes the following steps:

[0036] (1) Take Ti(C 0.5 N 0.5 ):55g, ZrO 2 Whiskers: 15g, WC: 10g, Co: 8g, Mo 2 C: 5g, Ni: 7g, put in a ball mill jar, add 800g of cemented carbide balls and 100ml of absolute ethanol; control the speed of ball milling on the jar ball mill at 300r / min for 24h, pour it out and place it in an oven at 85°C After drying, the dried powder is ground, sprayed and granulated, and passed through a 100-mesh sieve for use. The above ZrO 2 Whiskers choose high-strength ZrO 2 Whiskers, the diameter of the whiskers is between 50 and 300nm, and the aspect ratio is between 1:8 and 1:15.

[0037] (2) According to the shape of the tool, take the appropriate amount of powder above, place it in an alloy abrasive tool and dry press it at 200MPa, and then place it in a vacuum hot-press furnace for sintering, with a v...

Embodiment 3

[0040] A method for preparing a high-temperature oxidation-resistant whisker-modified Ti(C,N)-based composite cermet according to this embodiment includes the following steps:

[0041] (1) Take Ti(C 0.5 N 0.5 ):60g, Al 2 o 3 Whiskers: 10g, WC: 15g, Co: 5g, Mo 2 C: 5g, Ni: 5g, put in a ball mill jar, add 800g of cemented carbide balls and 100ml of absolute ethanol; control the speed of ball milling on the jar ball mill at 300 r / min for 24 hours, pour it out and place it in an oven at 85°C Dry in medium temperature, grind the dried powder, spray granulate, and pass through a 100-mesh sieve for later use. Al above 2 o 3 Whiskers select high-strength Al 2 o 3 Whiskers, the diameter of the whiskers is between 50 and 300nm, and the aspect ratio is between 1:8 and 1:15.

[0042] (2) According to the shape of the tool, take the appropriate amount of powder above, place it in an alloy abrasive tool and dry press it at 220MPa, and then place it in a vacuum sintering furnace for...

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Abstract

The invention discloses a preparation method of anti-high-temperature-oxidation crystal whisker modified Ti(C,N) base composite metal ceramic, and belongs to the field of high-speed cutter materials. The preparation method of the crystal whisker modified Ti(C,N) base composite metal ceramic comprises the steps of raw material matching, ball milling and material mixing, material drying, vacuum hot pressed sintering and the like. The crystal whisker modified Ti(C,N) base composite metal ceramic comprises, by weight, 45-60% of Ti(C<0.5>N<0.5>), 10-25% f Al2O3 crystal whisker or ZrO2 crystal whisker, 8-15% of WC, 5-10% of Co, 5-10% of Mo2C and 5-10% of Ni. The Ti(C,N) base composite metal ceramic obtained through the preparation method has excellent compactness, high-strength toughness and high temperature oxidation resistance, and can serve as a (semi) precision-machined cutter material of a special steel material.

Description

technical field [0001] The invention relates to the technical field of high-speed cutting tool materials, in particular to a method for preparing a whisker-modified Ti(C,N)-based composite cermet with high density and high strength and toughness. Background technique [0002] Ti(C,N)-based cermets use titanium carbonitride Ti(C,N) as the hard phase, nickel (Ni), molybdenum (Mo), and tungsten carbide (WC) as the metal binder phase, through powder Press sintered alloy. Ni can improve the strength of the alloy, and Mo can improve the wettability of liquid metal Ni to Ti(C,N). Cermet, as its name expresses, not only has the characteristics of wear resistance, high temperature resistance, high strength, high hardness, oxidation resistance and chemical stability of ceramics, but also has the toughness and plasticity of metals, so it is suitable for manufacturing Cutting tools, molds and wear parts. If a layer of ceramic coating with good air tightness, high melting point and po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/05C22C29/04C22C32/00
CPCC22C1/051C22C29/04C22C32/0005
Inventor 方一航赵先锐张梦贤许辉陈基根张平薛双喜王天乐冯尚申吴建波
Owner TAIZHOU UNIV
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