A kind of hard alloy material for valve ball and preparation method thereof

Abstract

The invention discloses a cemented carbide material for a valve ball and a preparation method thereof, wherein the cemented carbide material is prepared from the following components in weight percent: 40-85% tungsten carbide, 0-38% chromium carbide, 12 -19% nickel and 1-3% copper. The cemented carbide material of the present invention can adjust the density of the cemented carbide material between 9-14g / cm3 by changing the weight percentage of tungsten carbide and chromium carbide on the basis of hardness, flexural strength and wear resistance. In addition, the cemented carbide material of the present invention also has characteristics such as weak magnetic field, corrosion resistance, and long life. The check valve ball made of this alloy can improve oil recovery efficiency by 3-5% in the test of crude oil wells with different viscosities. %, in ordinary heavy oil well tests, the oil recovery rate can be increased by 19.65%, and the service life is more than one year, which can achieve good economic benefits.

Description

technical field

[0001] The invention relates to a cemented carbide material, in particular to a cemented carbide material for a valve ball, belonging to the technical field of cemented carbide. Background technique

[0002] At present, the vast majority of oil wells in our country use oil pumping to produce oil. The check valve ball is the heart part of the downhole oil pump, and it is also a vulnerable part in the oil pump. Its working state and life directly affect the pumping of the oil pump. Oil efficiency and maintenance intervals. If the service life is short, the pump will be stopped frequently, which will not only increase the labor load, but more importantly, affect the crude oil production. According to the relevant domestic statistics, the maintenance of stopping the pump due to the damage of the ball of the check valve accounts for about 30% of the total number of oil well pump maintenance, and the direct economic loss of each maintenance is more than 10,000 yua...

Examples

Embodiment 1

[0023] The cemented carbide material of this embodiment is prepared from the following components by weight percentage: 40% tungsten carbide, 38% chromium carbide, 19% nickel and 3% copper. The preparation method of this cemented carbide material comprises the following steps:

[0024] (1) Take tungsten carbide powder, chromium carbide powder, nickel powder, copper powder and an appropriate amount of absolute ethanol according to the above ratio, and add them to a drum-type ball mill for mixing. The ball-to-material ratio is 2:1, and the mixing time is 24 hours. , and then spray-dried to obtain the mixture;

[0025] (2) Adopt hydraulic press to press the mixture into shape, the pressure of pressing is 80MPa, obtains the molding blank;

[0026] (3) The formed blank was sintered in a vacuum carbon tube furnace at 1350° C. for 1 hour to obtain a cemented carbide material.

Embodiment 2

[0028] The cemented carbide material of this embodiment is prepared from the following components by weight percentage: 45% tungsten carbide, 36% chromium carbide, 17% nickel and 2% copper. The preparation method of the cemented carbide material is the same as in Example 1, except that the sintering temperature is 1360° C. and the sintering time is 1.5 hours.

Embodiment 3

[0030] The cemented carbide material of this embodiment is prepared from the following components by weight percentage: 50% tungsten carbide, 34% chromium carbide, 15% nickel and 1% copper. The preparation method of the cemented carbide material is the same as in Example 1, the sintering temperature is 1370° C., and the sintering time is 2 hours.

technical field

[0001] The invention relates to a cemented carbide material, in particular to a cemented carbide material for a valve ball, belonging to the technical field of cemented carbide. Background technique

[0002] At present, the vast majority of oil wells in our country use oil pumping to produce oil. The check valve ball is the heart part of the downhole oil pump, and it is also a vulnerable part in the oil pump. Its working state and life directly affect the pumping of the oil pump. Oil efficiency and maintenance intervals. If the service life is short, the pump will be stopped frequently, which will not only increase the labor load, but more importantly, affect the crude oil production. According to the relevant domestic statistics, the maintenance of stopping the pump due to the damage of the ball of the check valve accounts for about 30% of the total number of oil well pump maintenance, and the direct economic loss of each maintenance is more than 10,000 yua...

Examples

Embodiment 1

[0023] The cemented carbide material of this embodiment is prepared from the following components by weight percentage: 40% tungsten carbide, 38% chromium carbide, 19% nickel and 3% copper. The preparation method of this cemented carbide material comprises the following steps:

[0024] (1) Take tungsten carbide powder, chromium carbide powder, nickel powder, copper powder and an appropriate amount of absolute ethanol according to the above ratio, and add them to a drum-type ball mill for mixing. The ball-to-material ratio is 2:1, and the mixing time is 24 hours. , and then spray-dried to obtain the mixture;

[0025] (2) Adopt hydraulic press to press the mixture into shape, the pressure of pressing is 80MPa, obtains the molding blank;

[0026] (3) The formed blank was sintered in a vacuum carbon tube furnace at 1350° C. for 1 hour to obtain a cemented carbide material.

Embodiment 2

[0028] The cemented carbide material of this embodiment is prepared from the following components by weight percentage: 45% tungsten carbide, 36% chromium carbide, 17% nickel and 2% copper. The preparation method of the cemented carbide material is the same as in Example 1, except that the sintering temperature is 1360° C. and the sintering time is 1.5 hours.

Embodiment 3

[0030] The cemented carbide material of this embodiment is prepared from the following components by weight percentage: 50% tungsten carbide, 34% chromium carbide, 15% nickel and 1% copper. The preparation method of the cemented carbide material is the same as in Example 1, the sintering temperature is 1370° C., and the sintering time is 2 hours.

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