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a nbc-ni-mo 2 c high temperature cemented carbide and preparation method thereof

A cemented carbide and high-temperature technology, applied in the field of NbC-Ni-Mo2C high-temperature cemented carbide and its preparation, can solve problems affecting processing quality and tool life, crater wear, workpiece damage, etc., and achieve easy operation and fracture toughness And hardness enhancement, good red hardness effect

Active Publication Date: 2020-09-29
ZHUZHOU SANXIN HARD ALLOY PRODN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the existing cemented carbide, the performance begins to decline in the working environment above 800°C, and it will cause crater wear when processing iron-based workpieces, which will cause damage to the workpiece and affect the processing quality and tool life.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A kind of NbC-Ni-Mo 2 The preparation method of C high-temperature cemented carbide, the concrete preparation steps are:

[0026] S1. Dosing according to the weight ratio, wherein the NbC powder content is 88wt%, the Ni powder content is 8wt%, Mo 2 The C powder content is 4wt%, and the mixed material after configuration is 1Kg altogether. Add the mixture into a 2L ball mill cylinder, add 3Kg of cemented carbide grinding rods, add industrial alcohol with a water content of 5wt% as a wet grinding medium, and wet mill for 30 hours to obtain a slurry.

[0027] S2. Dry the slurry obtained in step S1, mix the dried material powder with glue, then press and shape it, then degumming and sintering at 1480°C, and keep it warm for 1h to obtain NbC-Ni-Mo 2 C high temperature cemented carbide.

[0028] Prepared NbC-Ni-Mo 2 The specification of the C high-temperature cemented carbide sample strip is 5.25mm×6.5mm×20mm, and the obtained sample strip is tested for hardness and fract...

Embodiment 2

[0030] This embodiment refers to the preparation method of Example 1, and the difference from Example 1 is that the proportion of the mixture is: the content of NbC powder is 86wt%, the content of Ni powder is 8wt%, and the content of Mo 2 The C powder content is 6wt%, and the prepared mixture is 1Kg in total; the wet grinding time is 20h, the degumming and sintering temperature is 1400°C, and the holding time is 2h.

Embodiment 3

[0032] This embodiment refers to the preparation method of Example 1, and the difference from Example 1 is that the proportion of the mixture is: the content of NbC powder is 84wt%, the content of Ni powder is 8wt%, Mo 2 The content of C powder is 8wt%, and the prepared mixture is 1Kg in total; the wet grinding time is 40h, the degumming and sintering temperature is 1600°C, and the holding time is 3h.

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PUM

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Abstract

The invention relates to the technical field of hard alloy materials and discloses novel NbC-Ni-Mo2C high temperature hard alloy and a preparation method thereof. The NbC-Ni-Mo2C high temperature hardalloy has better high temperature performance and can effectively reduce crater wear generated during material processing of an iron-based workpiece when the iron-based workpiece is processed. AfterMo2C is added on the basis of NbC-8Ni, the high temperature performance of the material is effectively improved, and it is shown in physical performance detection data that the hardness and the fracture toughness are also obviously improved.

Description

technical field [0001] The present invention relates to the technical field of cemented carbide materials, more specifically, relates to a kind of NbC-Ni-Mo 2 C high temperature cemented carbide and its preparation method. Background technique [0002] Cemented carbide is an alloy material made of hard compounds of refractory metals and bonding metals through powder metallurgy. Cemented carbide has a series of excellent properties such as high hardness, wear resistance, good strength and toughness, heat resistance and corrosion resistance, especially its high hardness and wear resistance, which basically remain unchanged even at a temperature of 500°C , It still has high hardness at 1000 °C. Cemented carbide is widely used as tool material, and it can also be used to cut difficult-to-machine materials such as heat-resistant steel, stainless steel, high manganese steel, and tool steel. [0003] Cemented carbide has high hardness, strength, wear resistance and corrosion res...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C29/06C22C1/05C22C1/10
CPCC22C1/051C22C29/005C22C29/067
Inventor 张可夫
Owner ZHUZHOU SANXIN HARD ALLOY PRODN CO LTD