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a tio 2 Cermet cutting tool material and preparation method thereof

A tool material and cermet technology, applied in the field of cermet, can solve the problems of unfavorable cermet performance optimization, reduced tool wear resistance, poor toughness and chipping resistance, etc., to improve cutting stability and overall performance. , the effect of inhibiting grain growth

Active Publication Date: 2022-04-08
ZHUZHOU HUARUI PRECISION CUTTINGS TOOLS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, cermet tools have the characteristics of poor toughness and chipping resistance, and there are abnormal tool fractures. If the content of binder phase is simply increased, the toughness can be improved, but at the same time, the wear resistance of the tool will be greatly reduced. , the ability to resist plasticity will also decrease, and the final tool life will be poor
In addition, in cermets, the carbon balance two-phase region is relatively wide, and being on the low-carbon side or high-carbon side is not conducive to the optimization of the performance of cermets. How to find the optimal value of carbon balance is also a problem worth exploring

Method used

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  • a tio <sub>2</sub> Cermet cutting tool material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Weigh Ti(C 0.5 ,N 0.5 ), (Ti 39.8 W 46.9 ) C, Mo 2 C, TaC, Cr 2 C, Co, Ni and TiO 2 , the ratio of raw materials is shown in Table 1.

[0025] Each raw material content in the embodiment 1 of table 1

[0026] raw material Ti(C 0.5 ,N 0.5 )

(Ti 39.8 W 46.9 )C

Mo 2 C

TaC Cr 2 C 3

co Ni TiO 2

mass percentage 40％ 25.5％ 10％ 7％ 1％ 9％ 6％ 1.5％

[0027] Pour the above-mentioned prepared raw materials into a ball mill, and add polyethylene glycol accounting for 3.5% of the total mass of the raw materials, the ratio of ball to material is 10:1, the amount of alcohol added is 0.75L / kg of raw materials, the speed of the ball mill is 37r / min, and the ball mill The time is 40h, and the alloy powder mixture is prepared. The mixed material is pressed into a green body of a certain size and shape under a pressing pressure of 80-120 MPa. The green body obtained above is placed in a nitrogen atmosphere for sinter...

Embodiment 2

[0030] Weigh Ti(C 0.5 ,N 0.5 ), (Ti 39.8 W 46.9 ) C, Mo 2 C, TaC, Cr 2 C, Co, Ni and TiO 2 , the ratio of raw materials is shown in Table 2.

[0031] Each raw material content in the embodiment 2 of table 2

[0032] raw material Ti(C 0.5 ,N 0.5 )

(Ti 39.8 W 46.9 )C

Mo 2 C

TaC Cr 2 C 3

co Ni TiO 2

mass percentage 39.5％ 26.5％ 10％ 6％ 1％ 8％ 7％ 2％

[0033]Pour the above-mentioned prepared mixed raw materials into a ball mill, and add 3.5% polyethylene glycol of the total weight of raw materials, the ratio of ball to material is 8:1, the amount of alcohol added is 0.75L / kg, the ball mill time is 40h, and the ball mill speed is 37r / min, the alloy powder mixture was prepared. The mixed material is pressed into a green body of a certain size and shape at a pressing pressure of 80-120 MPa. Put the compact obtained above into a nitrogen atmosphere for sintering, the sintering temperature is 1480°C, keep it warm...

Embodiment 3

[0036] Weigh Ti(C 0.5 ,N 0.5 ), (Ti 39.8 W 46.9 ) C, Mo 2 C, TaC, Cr 2 C, Co, Ni and TiO 2 , the ratio of raw materials is shown in Table 3.

[0037] Each raw material content in the embodiment 3 of table 3

[0038] raw material Ti(C 0.5 ,N 0.5 )

(Ti 39.8 W 46.9 )C

Mo 2 C

TaC Cr 2 C 3

co Ni TiO 2

mass percentage 43.5％ 22.5％ 10％ 6％ 1％ 8.5％ 6.5％ 3％

[0039] Pour the above-mentioned prepared raw materials into a ball mill, and add polyethylene glycol accounting for 3.5% of the total mass of the raw materials, the ratio of ball to material is 8:1, the amount of alcohol added is 0.75L / kg of raw materials, the speed of the ball mill is 37r / min, and the ball mill The time is 40h, and the alloy powder mixture is prepared. The mixed material is pressed into a green body of a certain size and shape under a pressing pressure of 80-120 MPa. The green body obtained above is placed in a nitrogen atmosphere for sin...

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Abstract

The present invention provides a kind of TiO containing 2 The cermet tool material and preparation method thereof, the material comprises the following raw materials by mass percentage, Ti(C 0.5 , N 0.5 ): 35~45%, (Ti 39.8 , W 46.9 )C: 20~30%, Mo 2 C: 5 to 15%, TaC: 5 to 10%, Cr 2 C 3 : 0.5~1.5%, Co+Ni: 12~18%, TiO 2 : 1 to 3%. Weigh each raw material according to the proportion, add polyethylene glycol forming agent and alcohol, after ball milling and drying, press into green body; the obtained green body is sintered and rapidly cooled to obtain TiO containing TiO 2 This method can greatly improve the bending strength and fracture toughness of the cermet, so as to achieve a good match of hardness and toughness, and improve the cutting stability and service life of the cermet.

Description

technical field [0001] The invention relates to the field of cermets, in particular to a TiO-containing 2 Metal-ceramic cutting tool material and its preparation method. Background technique [0002] As a new type of hard material, cermet has excellent characteristics such as high hardness, high wear resistance and chemical stability, so it is widely used as tool material, mold material and heat-resistant and wear-resistant parts. In particular, as cutting tools, cermets have the characteristics of high temperature resistance, small friction coefficient, and good metal adhesion resistance. Quality alloy knives. However, cermet tools have the characteristics of poor toughness and chipping resistance, and there are abnormal tool fractures. If the content of binder phase is simply increased, the toughness can be improved, but at the same time, the wear resistance of the tool will be greatly reduced. , the ability to resist plasticity will also decrease, and the final tool li...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C29/02C22C1/05C23C8/24
CPCC22C29/02C22C29/005C22C1/051C23C8/24
Inventor 彭欣高荣根杨慧肖旭凯
Owner ZHUZHOU HUARUI PRECISION CUTTINGS TOOLS CO LTD