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Ti(c,n)-based cermet reinforced and toughened by strip-shaped ternary boride and preparation method thereof

A ternary boride, strengthening and toughening technology, applied in the field of metal matrix composite materials, to achieve the effect of low raw material cost, improved service life and high cost performance

Active Publication Date: 2016-12-07
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The invention aims at the defects of existing Ti(C,N)-based cermets, and provides a low-cost, high-strength and tough Ti(C,N)-based cermet and a preparation method thereof

Method used

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  • Ti(c,n)-based cermet reinforced and toughened by strip-shaped ternary boride and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] When preparing the mixture, Ti, C, and N are mainly introduced from titanium carbonitride solid solution; Ni and Mo are respectively introduced from nickel powder and molybdenum powder; W is introduced from tungsten carbide powder; Fe and B are introduced from ferroboron powder, of which 1 # and 2 # 0.5 part of C in the composition is introduced by graphite powder, 3 # and 4 # 1.0 part of C in the composition is introduced by graphite powder;

[0030] The mixing process is carried out in a planetary ball mill, the speed of the ball mill is 200rpm, and the time is 30h;

[0031] The addition amount of molding agent polyvinyl alcohol aqueous solution is 3wt%, and the pressure used for compression molding is 200MPa;

[0032] The degreasing process is carried out under the condition that the degree of vacuum is higher than 10Pa, and the heating rate between 200 and 400°C is 0.3°C / min;

[0033] The vacuum degree of vacuum sintering is higher than 1.0×10 -2 Pa. Vacuum si...

Embodiment 2

[0038] When preparing the mixture, Ti, C, and N are mainly introduced from titanium carbonitride solid solution; Ni and Mo are respectively introduced from nickel powder and molybdenum powder; W is introduced from tungsten carbide powder; Fe and B are introduced from ferroboron powder, of which 1 # and 2 # 0.5 part of C in the composition is introduced by graphite powder, 3 # and 4 # 1.0 part of C in the composition is introduced by graphite powder;

[0039] The mixing process is carried out in a planetary ball mill, the speed of the ball mill is 220rpm, and the time is 28h;

[0040] The addition amount of forming agent polyvinyl alcohol aqueous solution is 4wt%, and the pressure used for compression molding is 230MPa;

[0041] The degreasing process is carried out under the condition that the degree of vacuum is higher than 10Pa, and the heating rate between 200 and 400°C is 0.4°C / min;

[0042] The vacuum degree of vacuum sintering is higher than 1.0×10 -2 Pa. Vacuum si...

Embodiment 3

[0047] When preparing the mixture, Ti, C, and N are mainly introduced from titanium carbonitride solid solution; Ni and Mo are respectively introduced from nickel powder and molybdenum powder; W is introduced from tungsten carbide powder; Fe and B are introduced from ferroboron powder, of which 1 # and 2 # 0.5 part of C in the composition is introduced by graphite powder, 3 # and 4 # 1.0 part of C in the composition is introduced by graphite powder;

[0048] The mixing process is carried out in a planetary ball mill, the speed of the ball mill is 260rpm, and the time is 24h;

[0049] The addition amount of forming agent polyvinyl alcohol aqueous solution is 4wt%, and the pressure used for compression molding is 260MPa;

[0050] The degreasing process is carried out under the condition that the degree of vacuum is higher than 10Pa, and the heating rate between 200 and 400°C is 0.4°C / min;

[0051] The vacuum degree of vacuum sintering is higher than 1.0×10 -2 Pa. Vacuum si...

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Abstract

The invention provides a stripe type ternary boride reinforced and toughened Ti(C, N)-based metal ceramic and a preparation method thereof. The metal ceramic is prepared from the following components in parts by mass: 30.0-39.0 parts of Ti, 5.3-6.4 parts of C, 3.9-4.9 parts of N, 28-34 parts of Ni, 12-16 parts of Mo, 6.2-9.8 parts of W, 0.5-2.9 parts of Fe and 0.1-0.6 part of B. The preparation method is characterized by comprising the following steps: directly adding ferro-boron powder into a mixed material during dosing; and then finally obtaining metal ceramic sintered body sequentially through material mixing, forming and degreasing and by using a special combined vacuum sintering method. The Ti(C, N)-based metal ceramic provided by the invention is low in cost, not only has relatively high hardness, but also has relatively high bending strength and breaking tenacity, is simple in preparation method and suitable for industrial production on large scale, and has an extremely high cost performance and a wide application prospect.

Description

technical field [0001] The invention belongs to the field of metal-based composite materials, and relates to a Ti(C,N)-based cermet reinforced and toughened by a strip-shaped ternary boride and a preparation method thereof. Background technique [0002] Ti(C,N)-based cermets have the advantages of good red hardness, high wear resistance, high temperature creep resistance and oxidation resistance, and low friction coefficient with metals. If used as a tool material, compared with commonly used carbide tools, it has obvious advantages in the following aspects: it can allow higher cutting speed and larger feed rate, higher resistance to crater wear, The processed workpiece has a very good surface quality. In countries such as Europe, America and Japan, the development of Ti(C,N)-based cermets is very rapid. At present, it has been successfully applied in the fields of finishing, semi-finishing, and even roughing, and its share in the tool market is increasing year by year. In...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C29/04C22C1/05
Inventor 郑勇周伟赵毅杰张家杰马遗萍
Owner SHAREATE TOOLS
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