Preparation method of h-BN added titanium boride-based self-lubricating ceramic cutter material

A technology of hexagonal boron nitride and ceramic cutting tools, which is applied in the field of preparation of ceramic cutting tool materials, can solve problems such as the full play of performance advantages, and achieve the effects of inhibiting grain growth, reducing friction coefficient, and good self-lubricating properties

Inactive Publication Date: 2013-02-13
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for TiB 2 There are few studies on self-lubricating ceramic materials based on TiB 2 The performance advantages of self-lubricating ceramic materials have not been fully utilized in the field of cutting tools

Method used

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  • Preparation method of h-BN added titanium boride-based self-lubricating ceramic cutter material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Add hexagonal boron nitride titanium boride-based self-lubricating ceramic tool material, the volume percentage of raw material components is:

[0037] micron titanium diboride (TiB 2 ) 65%, micron tungsten carbide (WC) 25%, micron hexagonal boron nitride (h-BN) 5%, micron molybdenum (Mo) 2%, micron nickel (Ni) 3%.

[0038] The preparation method is as follows:

[0039] Weigh TiB in proportion 2 Powder, with an appropriate amount of absolute ethanol as the dispersion medium, made into TiB 2 Suspension, fully stirred with a stirrer, ultrasonically dispersed for 20 minutes; WC powder and h-BN powder were weighed in proportion, added with absolute ethanol to make a mixed suspension, fully stirred, ultrasonically dispersed for 20 minutes; the obtained TiB 2 , WC and h-BN suspensions were mixed to obtain a multi-phase suspension, and then sintering aids Mo and Ni were added in proportion, after ultrasonic dispersion for 20 minutes, and mixed evenly; the mixture was poured...

Embodiment 2

[0043] Titanium boride-based self-lubricating ceramic tool material with hexagonal boron nitride added, the volume percentage of raw material components is: 70%TiB 2 , 18%WC, 8%h-BN, 2%Mo, 2%Ni. The preparation method is as follows:

[0044] Weigh TiB in proportion 2 Powder, with an appropriate amount of absolute ethanol as the dispersion medium, made into TiB 2 Suspension, fully stirred with a stirrer, and ultrasonically dispersed for 25 minutes; the obtained WC powder and h-BN powder were weighed in proportion, and anhydrous ethanol was added to make a mixed suspension, fully stirred, and ultrasonically dispersed for 25 minutes; the obtained TiB 2 , WC and h-BN suspensions were mixed to obtain a multi-phase suspension, and then sintering aids Mo and Ni were added in proportion, after ultrasonic dispersion for 30 minutes, and mixed uniformly; the mixture was poured into a ball mill jar, and nitrogen was used as a protective atmosphere to Anhydrous ethanol is used as the me...

Embodiment 3

[0047] The preparation method of titanium boride-based self-lubricating ceramic tool material with hexagonal boron nitride added, the volume percentage of raw material components is: micron titanium diboride 60%, micron tungsten carbide 30%, micron hexagonal boron nitride 5%, micron Molybdenum 2%, micron nickel 3%. Operation steps and process condition are with embodiment 1.

[0048] The obtained ceramic tool material was processed by wire cutting, rough grinding, fine grinding, grinding, and polishing to prepare test samples, and its mechanical performance parameters were measured: bending strength 627MPa, fracture toughness 5.1MPa m 1 / 2 , Vickers hardness 14.7GPa. The coefficient of friction is 0.34.

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Abstract

The invention relates to a preparation method of an h-BN (hexagonal Boron Nitride) added titanium boride-based self-lubricating ceramic cutter material. According to the method, the material is formed in such a way that TiB2 as a base body, added micron WC (Wolfram Carbide) as a reinforced phase, the micron h-BN as a solid lubricant, and micron Mo and micron Ni as sintering additives are sintered. The preparation method comprises the following steps: respectively dispersing the micron TiB2 powder, the micron WC powder and the micron h-BN powder, and carrying out ball milling and drying so as to obtain powders, and finally, sintering the powders through a hot pressing method. The method has the advantages of simplicity, convenience in operation and the like. The self-lubricating ceramic cutter material has an excellent comprehensive mechanical property and an anti-friction wear-resisting property, and can be used for fabricating cutting tools, dies and other friction-resistant corrosion-resistant parts.

Description

technical field [0001] The invention relates to a preparation method of a ceramic cutting tool material, in particular to a preparation method of a titanium boride-based self-lubricating ceramic cutting tool material added with hexagonal boron nitride. Background technique [0002] Green manufacturing has become the development trend of the machinery manufacturing industry in the 21st century. With the improvement of social sustainable development awareness and the deepening of research, the negative effects brought by the use of cutting fluid are becoming more and more obvious. The most effective way to eliminate the negative effects of cutting fluid is to cancel the use of cutting fluid and perform dry cutting. However, dry cutting puts forward stricter requirements on the cutting tool. The friction in the high-speed dry cutting process is very serious, the wear of the cutting tool increases sharply, and the durability of the cutting tool is low. [0003] CN1114103A (CN94...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/58C04B35/622
Inventor 许崇海徐秀国方斌王春林李明
Owner QILU UNIV OF TECH
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