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Hard alloy wear part and preparation method and application thereof.

A technology of hard alloy and wear-resistant parts, applied in the field of hard alloy wear-resistant parts and its preparation, can solve the problems of poor wear resistance of hard alloy wear-resistant parts, scrapping of TC bearing products, and low toughness of hard alloy, etc. Achieve the effects of increased hardness and flexural strength, good inhibition effect, improved flexural strength and toughness

Inactive Publication Date: 2019-03-15
株洲金韦硬质合金有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, due to fluctuations in the production process and raw materials, the existing hard alloy wear-resistant parts often have low hardness or low bending strength. The low hardness makes the wear resistance of hard alloy wear-resistant parts poor. Low and uneven bending strength will result in low toughness of cemented carbide. During use, it is easy to cause cracks on the gauge strips bonded to the surface of TC bearings, and many cracks or even breaks on the surface, which will eventually cause TC bearings to be scrapped.
Moreover, TaC is usually used as an inhibitor in the existing hard alloy wear-resistant parts. Since the inhibitor TaC is very expensive in the market, the production cost of hard alloy wear-resistant parts using TaC as an inhibitor is relatively high.

Method used

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  • Hard alloy wear part and preparation method and application thereof.
  • Hard alloy wear part and preparation method and application thereof.
  • Hard alloy wear part and preparation method and application thereof.

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] This embodiment provides a hard alloy wear-resistant part, which is composed of the following alloy components in weight percentage: Co powder: 6%, rare earth element: 0.1%, inhibitor: 0.3%, and the balance is WC, all of the above alloy components The sum is 100%; among them, the rare earth element is Ce, with Ce(NO 3 ) 3 ·6H 2 Added in the form of O; the inhibitor is Cr 3 C 2 ; The particle size of WC is 1.3 μm.

[0058] The preparation method of the above-mentioned cemented carbide wear-resistant parts comprises the following steps:

[0059] S1. Add Cr 3 C 2 Pre-grind for 2 hours, add 50mL of alcohol to pre-grind at the same time, the ball-to-material ratio is 3:1;

[0060] S2. WC, Co powder, Ce(NO 3 ) 3 ·6H 2 O and Cr from S1 3 C 2 Carry out batching according to above-mentioned weight percentage, add the paraffin wax and oleic acid after pre-grinding treatment, the paraffin addition amount is 2% of batching weight, the oleic acid addition amount is 2‰ of...

Embodiment 2

[0066] This embodiment provides a hard alloy wear-resistant part, which is composed of the following alloy components in weight percentage: Co powder: 15%, rare earth elements: 0.15%, inhibitor: 0.3%, and the balance is WC, all of the above alloy components The sum is 100%; among them, the rare earth element is Ce, with Ce(NO 3 ) 3 ·6H 2 Added in the form of O; the inhibitor is Cr 3 C 2 ; The particle size of WC is 1.4 μm.

[0067] For the preparation method of the above hard alloy wear-resistant parts, refer to the operation steps of Example 1, the main difference is: step S2, the wet grinding process parameters are: the ball-to-material ratio is 8:1, the ball-milling medium is alcohol, and the alcohol coefficient is 0.5 mL / kg, ball milling time 40h, rotating speed 63r / min.

Embodiment 3

[0069] This embodiment provides a hard alloy wear-resistant part, which is composed of the following alloy components in weight percentage: Co powder: 7.8%, rare earth elements: 0.2%, inhibitor: 0.3%, and the balance is WC, all of the above alloy components The sum is 100%; among them, the rare earth element is Ce, with Ce(NO 3 ) 3 ·6H 2 Added in the form of O; the inhibitor is Cr 3 C 2 ; The particle size of WC is 1.2 μm.

[0070] For the preparation method of the above hard alloy wear-resistant parts, refer to the operation steps of Example 1, the main difference is: step S2, the wet grinding process parameters are: the ball-to-material ratio is 6:1, the ball-milling medium is alcohol, and the alcohol coefficient is 0.3 mL / kg, ball milling time 50h, rotating speed 63r / min.

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Abstract

The invention belongs to the technical field of processing of hard alloy wear parts, and discloses a hard alloy wear part and a preparation method and application thereof. The hard alloy wear part iscomposed of the following alloy components of percentage by weight: 6-15% of Co powder; 0.05-0.4% of rare earth element; 0.1-0.6% of an inhibitor; and the balance WC; and the sum of all the alloy components is 100%. The invention adopts Cr3C2 as an inhibitor in the hard alloy wear part, and the inhibition effect is good, and the addition of the rare earth element can further strengthen the inhibition effect, and can also strengthen the toughness effect of Co, and through the synergistic action of the Cr3C2 and the rare earth element, the hardness and bending strength of the hard alloy wear part are significantly improved, and the service life of the hard alloy wear part is prolonged.

Description

technical field [0001] The invention belongs to the technical field of hard alloy wear-resistant parts processing, and more specifically relates to a hard alloy wear-resistant part and its preparation method and application. Background technique [0002] Carbide wear-resistant parts are widely used in screw drilling tools and other drilling rigs, as well as professional manufacturers of TC bearings and centralizers. Their function is to increase the wear resistance and toughness of TC bearings and improve the service life of products. Therefore, in the actual use process, the quality of the wear-resistant material itself is very important, and the hardness and bending strength of the hard alloy wear-resistant parts are important indicators to measure its quality. In general, the hardness HRA of hard alloy wear parts must be greater than 91.0, and the bending strength must be greater than 2800N / mm 2 In order to meet the basic requirements of use. [0003] However, due to fl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C29/08C22C1/05E21B4/00E21B17/10
CPCB22F2998/10C22C1/051C22C29/08E21B4/003E21B17/10B22F2009/043B22F3/02B22F3/14
Inventor 庞其凤
Owner 株洲金韦硬质合金有限公司
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