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Cobalt-nickel-iron-chromium-based hard alloy material and preparation method thereof

A hard alloy, iron-chromium technology, applied in the field of cobalt-nickel-iron-chromium-based hard alloy materials and their preparation, can solve problems such as unproposed solutions, achieve rich mineral deposits, improve fracture toughness, improve oxidation resistance and resistance corrosive effect

Pending Publication Date: 2021-10-01
CENT SOUTH UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] For the above problems, no effective solution has been proposed

Method used

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  • Cobalt-nickel-iron-chromium-based hard alloy material and preparation method thereof
  • Cobalt-nickel-iron-chromium-based hard alloy material and preparation method thereof
  • Cobalt-nickel-iron-chromium-based hard alloy material and preparation method thereof

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Experimental program
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Embodiment 1

[0037] In an optional embodiment, this embodiment provides a cobalt-nickel-iron-chromium-based hard alloy material, which is composed of the following alloy components in weight percentage: Co powder: 10%, Ni powder: 8%, Fe powder: 1 %, Cr 2 C 3 Powder: 1.15%, W powder: 1.1%, VC powder: 0.15%, NbC powder: 0.3%, TaC powder: 0.3%, WC powder: 78%, the average particle size of WC is 1.94um, the average particle size of Co powder 1.52um, the average particle size of Ni powder is 2.5um, the average particle size of Fe powder is 2.65um, Cr 2 C 3 The average particle size of the powder is 3.0um, the average particle size of the W powder is 1.0um, and the average particle size of the VC, NbC, TaC powder is 0.8um.

[0038] The preparation method of above-mentioned cobalt-nickel-iron-chromium-based hard alloy material comprises the following steps:

[0039] Step S1, each raw material is weighed according to the following mass percentage: Co powder: 10%, Ni powder: 8%, Fe powder: 1%, ...

Embodiment 2

[0046] In another optional embodiment, this embodiment provides a cobalt-nickel-iron-chromium-based hard alloy material, which is composed of the following alloy components in weight percentage: Co powder: 10%, Ni powder: 7%, Fe powder: 2%, Cr 2 C 3 Powder: 1.15%, W powder: 1.35%, VC powder: 0.1%, NbC powder: 0.35%, TaC powder: 0.25%, WC powder: 77.8%, the average particle size of WC is 1.94um, the average particle size of Co powder 1.52um, the average particle size of Ni powder is 2.5um, the average particle size of Fe powder is 2.65um, Cr 2 C 3 The average particle size of the powder is 3.0um, the average particle size of the W powder is 1.0um, and the average particle size of the VC, NbC, TaC powder is 0.8um.

[0047] The preparation method of above-mentioned cobalt-nickel-iron-chromium-based hard alloy material comprises the following steps:

[0048] Step S1, each raw material is weighed according to the following mass percentage: Co powder: 10%, Ni powder: 7%, Fe powd...

Embodiment 3

[0057] In an optional embodiment, this embodiment provides a cobalt-nickel-iron-chromium-based hard alloy material, which is composed of the following alloy components in weight percentage: Co powder: 10.5%, Ni powder: 7.5%, Fe powder: 2 %, Cr 2 C 3 Powder: 1.25%, W powder: 1%, VC powder: 0.15%, NbC powder: 0.3%, TaC powder: 0.3%, WC powder: 77%, the average particle size of WC is 1.94um, the average particle size of Co powder 1.52um, the average particle size of Ni powder is 2.5um, the average particle size of Fe powder is 2.65um, Cr 2 C 3 The average particle size of the powder is 3.0um, the average particle size of the W powder is 1.0um, and the average particle size of the VC, NbC, TaC powder is 0.8um.

[0058] The preparation method of above-mentioned cobalt-nickel-iron-chromium-based hard alloy material comprises the following steps:

[0059] Step S1, each raw material is weighed according to the following mass percentage: Co powder: 10.5%, Ni powder: 7.5%, Fe powder...

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Abstract

The invention discloses a cobalt-nickel-iron-chromium-based hard alloy material and a preparation method thereof. Co, Ni, Fe and Cr are used as binder phases, W, V, Nb, Ta and the like are used as trace alloy elements, and Co, Ni, Fe, Cr or Cr3C2 powder, the alloy elements and carbide powder are subjected to mixing, ball milling, drying granulation, press forming, dewaxing and sintering to prepare a series of novel binder hard alloys which are low in cost and high in performance. The high-quality cobalt-nickel-iron-chromium-based hard alloy is obtained by adopting the tungsten carbide powder with the average particle size of 1.5-2.5 [mu]m, the particle size distribution of 0.7-4.2 [mu]m and the content of 65-95% (weight ratio) and carrying out low-pressure sintering for 0.5-2 hours at the temperature of 1350-1480 DEG C and the pressure of 5-10 MPa. The hardness of the cobalt-nickel-iron-chromium-based hard alloy material prepared by the method reaches the level of a hard alloy with Co as a binder phase, the bending strength and the fracture toughness are improved by 10-20% compared with those of a pure cobalt hard alloy, and industrial requirements are met. The application range of the product can cover hard alloy cutters, mining tools, shield products and PCB micro drills.

Description

technical field [0001] The present application relates to the technical field of powder metallurgy, in particular to a cobalt-nickel-iron-chromium-based hard alloy material and a preparation method thereof. Background technique [0002] Cemented carbide usually uses refractory carbide as the matrix, and soft and ductile metal as the binder phase. Cemented carbide combines the advantages of high hardness refractory metal carbide and good ductility bonding metal, with high strength and hardness, good wear resistance, good red hardness, small thermal expansion coefficient, high elastic modulus and chemical With a series of excellent properties such as good stability, it is widely used in cutting tools, mining tools, wear-resistant parts and other fields. [0003] Metal Co has been widely used in the production of cemented carbide due to its excellent wettability, good yield strength and work hardening properties. However, Co, as a key and scarce strategic metal, is expensive ...

Claims

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Application Information

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IPC IPC(8): C22C29/08C22C1/05
CPCC22C29/08C22C29/067C22C1/051
Inventor 刘咏钱铖李昆成会朝张伟申梦光
Owner CENT SOUTH UNIV
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