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Self-lubricating ceramic cutting bits

A ceramic tool, self-lubricating technology, applied in the field of advanced manufacturing, can solve the problem of no self-lubricating function

Inactive Publication Date: 2005-02-23
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The English literature "Wear" (1999, 225: 267-272) reported that Al 2 o 3 / TiC ceramic tool; Chinese literature "Journal of Shandong Institute of Technology" (1982, (4): 1 ~ 16) reported 2 o 3 / TiC / Mo / Ni ceramic tools, the above Al 2 o 3 / TiC ceramic knives are all prepared by hot pressing sintering process, no solid lubricant is added to the tool material, and there is no self-lubricating function

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Embodiment one: press Al 2 o 3 42.5%, TiC 42.5%, CaF 2 The mass percentage of 15.0% weighs raw materials. Mix the weighed raw materials, and then carry out intensive ball milling, using ethanol as the medium, and the ball milling time is 100 hours. The ball-milled material is placed in a vacuum drying oven to dry, and the dried material is screened in a cabinet with a nitrogen-protected atmosphere. The self-lubricating ceramic tool material was prepared by hot pressing sintering method, the sintering temperature was 1700℃, the pressure was 30MPa, the holding time was 10min, and the sintering atmosphere was nitrogen.

Embodiment 2

[0013] Embodiment two: press Al 2 o 3 45.0%, TiC 45.0%, CaF 2 The mass percentage of 10.0% weighs the raw materials. Mix the weighed raw materials, and then carry out intensive ball milling, using ethanol as the medium, and the ball milling time is 100 hours. The ball-milled material is placed in a vacuum drying oven to dry, and the dried material is screened in a cabinet with a nitrogen-protected atmosphere. The self-lubricating ceramic tool material was prepared by hot pressing sintering method, the sintering temperature was 1720°C, the pressure was 32MPa, the holding time was 12min, and the sintering atmosphere was nitrogen.

Embodiment 3

[0014] Embodiment three: press Al 2 o 3 47.5%, TiC 47.5%, CaF 2 5.0% by mass percentage weighed raw materials. Mix the weighed raw materials, and then carry out intensive ball milling, using ethanol as the medium, and the ball milling time is 100 hours. The ball-milled material is placed in a vacuum drying oven to dry, and the dried material is screened in a cabinet with a nitrogen-protected atmosphere. The self-lubricating ceramic tool material was prepared by hot pressing sintering method, the sintering temperature was 1750°C, the pressure was 35MPa, the holding time was 15min, and the sintering atmosphere was nitrogen.

[0015] Al prepared by the above process 2 o 3 / TiC / CaF 2 Self-lubricating ceramic tool material has self-lubricating function during dry cutting, and the friction coefficient can be reduced by more than 20%. It is suitable for dry cutting and cutting of difficult-to-machine materials.

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Abstract

A self-lubricating ceramic cutting tool is prepared from Al2O3 TiC and CaF2 as solid lubricant, which forms a continuous lubricant film on cutting surfaces at a wide range of working temperature.

Description

technical field [0001] The invention belongs to the field of advanced manufacturing technology, in particular to a self-lubricating ceramic tool material. Background technique [0002] Ceramic materials have the characteristics of high hardness, wear resistance, high temperature resistance and good chemical stability. However, ceramic materials have a high coefficient of friction when rubbed in the absence of a medium. Therefore, how to reduce the friction coefficient becomes the key to its application. Self-lubricating ceramic materials are made by adding solid lubricants as additives to ceramic materials to form ceramic composite materials, forming a solid lubricating film on the friction surface, thereby realizing the self-lubricating function. Al 2 o 3 / TiC ceramic cutting tool is one of the most widely used ceramic cutting tools at home and abroad, mainly used in dry cutting various steel and its alloy materials. However, during dry cutting, due to the lack of lubr...

Claims

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Application Information

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IPC IPC(8): C04B35/10C04B35/56C04B35/622C04B35/64
Inventor 邓建新曹同坤孙军龙艾兴
Owner SHANDONG UNIV
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