Nitrogen-containing hard alloy based on multi-element composite titanium carbonitride solid solution and preparation method for nitrogen-containing hard alloy

A cemented carbide, multi-component composite technology, applied in the field of cemented carbide, can solve the problem of low strength and hardness of cemented carbide, achieve the effect of improving hardness and toughness, strengthening the bonding phase, and realizing the effect of hardness and toughness

Active Publication Date: 2012-07-04
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the functional characteristics of the surface gradient structure of this type of cemented carbide can realize the combination of hardness and toughness of the cemented carbide material, the overa

Method used

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  • Nitrogen-containing hard alloy based on multi-element composite titanium carbonitride solid solution and preparation method for nitrogen-containing hard alloy
  • Nitrogen-containing hard alloy based on multi-element composite titanium carbonitride solid solution and preparation method for nitrogen-containing hard alloy

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Experimental program
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Effect test

Embodiment 1

[0030] The raw materials used in this embodiment and the processing steps are as follows:

[0031] Weigh 82g WC powder, 8g Co powder and 10g (Ti, 15W, 5Mo, 0.2V) (C 0.7 , N 0.3 ) solid solution powder, then put it into a ball mill tank, put into balls according to the ball-to-material ratio of 6:1, pour 100ml of alcohol, and ball mill for 72 hours to obtain a mixed wet material, which is dried in an oven at 70°C for 1.5 hour, according to 0.5% of the weight of the dried mixture, add molding agent paraffin and mix evenly, and then pass the 800-mesh sieve after drying the mixture added with paraffin in an oven at 70°C for 1 hour, and sieve the mixed powder Granulate through a granulator to form a granular mixture;

[0032] Weigh 10 parts of 8.4g granular mixture, put it into the cavity of the mold successively, press it into 10 cemented carbide product blanks, then put the cemented carbide blanks into a low-pressure sintering furnace for sintering, and the sintering The proce...

Embodiment 2

[0035] The raw materials used in this embodiment and the processing steps are as follows:

[0036] Weigh 74g of WC powder, 6g of Co powder and 20g of (Ti, 15W, 5Mo) (C0.5, N0.5) solid solution powder respectively, and then put them into a ball mill jar, put them into balls according to the ball-to-material ratio of 8:1, and ball mill Add 85ml of alcohol, ball mill for 24 hours to get the mixed wet material, dry the mixed wet material in an oven at 60°C for 2 hours, add molding agent rubber according to 1% of the weight of the dried mixture and mix evenly, then add the rubber The mixed material is dried in an oven at 80°C for 1 hour and passed through a 300-mesh sieve, and the sieved mixed powder is granulated by a granulator to form a granular mixed material;

[0037] Weigh 2 parts of 35.8g granular mixture, put it into the cavity of the mold successively, press it into 2 cemented carbide product blanks, then put the cemented carbide blanks into a low-pressure sintering furnac...

Embodiment 3

[0040] The raw materials used in this embodiment and the processing steps are as follows:

[0041] Weigh 60g WC powder, 10g Co powder and 30g (Ti, 5Nb, 5Mo, 0.2Cr, 0.5Y, 0.5Nd) (C 0.9 , N 0.1 ) solid solution powder, then put it into a ball mill tank, put into balls according to the ball-to-material ratio of 4:1, and pour 115ml of alcohol into it, and ball mill it for 36 hours to obtain a mixed wet material, and dry the mixed wet material in an oven at 80°C for 1 hour, according to 2wt% of the weight of the dried mixture, add forming agent polyethylene glycol and mix uniformly, then the mixture added with polyethylene glycol is passed through a 600-mesh sieve after being dried at 80°C for 1 hour in an oven, and the sieved The divided mixed powder is granulated by a granulator to form a granular mixture;

[0042] Weigh 2 parts of granular mixture of 49.5g, put it into the cavity of the mold successively, press it into 2 cemented carbide product blanks, then put the cemented c...

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Abstract

The invention discloses a nitrogen-containing hard alloy based on a multi-element composite titanium carbonitride solid solution. A hard phase of the alloy is WC and a solid solution (Ti, M) (Cx, N1-x); a binding phase is Co and/or Ni; the hard phase and the binding phase are uniformly distributed in the hard alloy; raw materials of the hard alloy are Co and/or Ni powder, WC powder and solid solution (Ti, M) (Cx, N1-x) powder, and the nitrogen element in the hard alloy is introduced through the solid solution (Ti, M) (Cx, N1-x) powder; and in the solid solution (Ti, M) (Cx, N1-x), x is more than 0 and less than 1, and a component M is at least two of W, Mo, Ta, Nb, V, Cr, Zr, Hf, Y and lanthanides. A preparation method for the hard alloy comprises the following steps of: (1) mixing the raw materials and granulating; (2) molding; and (3) sintering under low pressure.

Description

technical field [0001] The invention belongs to the field of hard alloys, and relates to a hard alloy containing multi-component composite titanium carbonitride solid solution and a preparation method thereof. Background technique [0002] Because of its high strength and good toughness, WC-Co cemented carbide is used to make cutting tools and is widely used in modern manufacturing, but its hardness and wear resistance need to be further improved, otherwise, its application will be limited. Subsequently, people used Ti(C,N) with higher hardness than WC as the hard phase, Co or Ni as the binder phase, and added Mo 2 The second type of carbides such as C and WC are used to improve the poor wettability between Ti(C,N) and Co and Ni, and prepare Ti(C,N)-based cermets with excellent properties such as oxidation resistance, thermal conductivity and electrical conductivity. material, and it is used in the field of high-speed cutting. Although the problem of wear resistance of the ...

Claims

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Application Information

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IPC IPC(8): C22C29/08C22C1/04
Inventor 刘颖叶金文俞海军
Owner SICHUAN UNIV
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