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Plunger pump return stroke disk

A technology of return plate and plunger pump, which is applied in the direction of coating, furnace type, furnace, etc., can solve the problems of excessive return plate, non-wear resistance, and low hardness of plunger pumps, so as to ensure machining accuracy and improve wear resistance , the effect of less deformation

Inactive Publication Date: 2018-05-08
NINGBO HONGBO MACHINERY MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In terms of processing technology and material selection, it is found that the return plate of the plunger pump has excessive wear and insufficient hardness during use, especially after long-term use, this wear phenomenon is more serious
[0005] In view of the shortcomings of traditional alloy steel such as low hardness and non-wear resistance, Publication No. 106801165A discloses a method to improve the strength, hardness and melting point of the product by adding elements such as bismuth, manganese, copper, tungsten, and tellurium.
However, simply adding some elements cannot solve the problems of strength, toughness, corrosion resistance and wear resistance of the alloy.

Method used

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  • Plunger pump return stroke disk

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Ingredients: Weigh the raw materials according to the composition and mass percentage of the return plate of the plunger pump, including Nb: 0.03%, Al: 0.3%, C: 0.2%, Cr: 0.3%, Mo: 0.2%, Ti: 0.08%, Rare earth: 0.03%, N: 0.009%, the balance is Fe and impurities, wherein rare earth is one or more of Y, Sm, Ho, and impurities include P<0.004%, S<0.004%, O<0.002%. The raw materials except Al, N, Ti and rare earth are melted to form alloy liquid.

[0038] Self-deoxidation: The aluminum is ground into aluminum powder with a particle size of 400nm. First, half of the aluminum powder is added to the alloy solution for pre-deoxidation, and then the remaining aluminum powder is added for re-deoxidation.

[0039] Pulverizing: First, nitrogen and titanium are directly reacted at high temperature to obtain titanium nitride, and titanium nitride and rare earth are air-milled into powder with a particle size of 400 nm and mixed into powder.

[0040] Pouring: first spread the mixed po...

Embodiment 2

[0044] Ingredients: Weigh the raw materials according to the composition and mass percentage of the return plate of the plunger pump, including Nb: 0.02%, Al: 0.2%, C: 0.1%, Cr: 0.2%, Mo: 0.1%, Ti: 0.06%, Rare earth: 0.01%, N: 0.008%, the balance is Fe and impurities, wherein rare earth is one or more of Y, Sm, Ho, and impurities include P<0.004%, S<0.004%, O<0.002%. The raw materials except Al, N, Ti and rare earth are melted to form alloy liquid.

[0045] Self-deoxidation: The aluminum is ground into aluminum powder with a particle size of 400nm. First, half of the aluminum powder is added to the alloy solution for pre-deoxidation, and then the remaining aluminum powder is added for re-deoxidation.

[0046] Pulverizing: First, nitrogen and titanium are directly reacted at high temperature to obtain titanium nitride, and titanium nitride and rare earth are air-milled into powder with a particle size of 400 nm and mixed into powder.

[0047] Pouring: first spread the mixed po...

Embodiment 3

[0051] Ingredients: Weigh the raw materials according to the composition of the plunger pump return plate and its mass percentage, including Nb: 0.04%, Al: 0.4%, C: 0.3%, Cr: 0.4%, Mo: 0.3%, Ti: 0.1%, Rare earth: 0.05%, N: 0.01%, the balance is Fe and impurities, wherein rare earth is one or more of Y, Sm, Ho, and impurities include P<0.004%, S<0.004%, O<0.002%. The raw materials except Al, N, Ti and rare earth are melted to form alloy liquid.

[0052] Self-deoxidation: The aluminum is ground into aluminum powder with a particle size of 400nm. First, half of the aluminum powder is added to the alloy solution for pre-deoxidation, and then the remaining aluminum powder is added for re-deoxidation.

[0053] Pulverizing: First, nitrogen and titanium are directly reacted at high temperature to obtain titanium nitride, and titanium nitride and rare earth are air-milled into powder with a particle size of 400 nm and mixed into powder.

[0054] Pouring: first spread the mixed powder ...

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Abstract

The invention discloses a plunger pump return stroke disk and belongs to the technical field of metal materials. The plunger pump return stroke disk comprises raw material components including 0.02%-0.04% of Nb, 0.2%-0.4% of Al, 0.1%-0.3% of C, 0.2%-0.4% of Cr, 0.1%-0.3% of Mo, 0.06%-0.1% of Ti, 0.01%-0.05% of rare earth, 0.008%-0.01% of N and the balance Fe and impurities. The niobium in the rawmaterials can play a role in grain refining, crystal form intensifying, precipitation strengthening, phase change strengthening and the like in steel, the performance loss of the steel after vanadiumis removed can be made up, the content of the niobium is slightly increased so that the effect of the vanadium can be replaced, and the cost can be remarkably reduced. The rare earth is added, grainscan be refined, and the overall performance of the alloy steel is improved. Meanwhile, by changing the adding sequence of the aluminum and adjusting the addition amount of the aluminum, the oxygen content in the steel is reduced in a secondary oxygen removing manner. Metal nitride can be formed through surface nitriding, and the abrasion resisting performance and the corrosion resisting performance of the product surface are greatly improved.

Description

technical field [0001] The invention relates to a return disc of a plunger pump, which belongs to the field of metal materials. Background technique [0002] With the rapid development of the domestic construction machinery industry, the reliability control of construction machinery is becoming more and more strict. In order to improve the reliability of construction machinery, the stability of the plunger pump as the core component of construction machinery is also required to be higher and higher, and the stability of the plunger pump depends on the accuracy of the return disc of the main transmission part in the plunger pump. . The material of the return plate basically determines its comprehensive performance. At present, the material of the return plate is mostly ordinary steel. [0003] Alloy steel is an alloy system based on steel, adding a certain amount of carbon, molybdenum, manganese and other elements and controlling the content of the added elements. Alloy st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/26C22C38/06C22C38/22C22C38/28C21C7/06C21D1/18C21D9/00C23C8/34C23C8/38
CPCC22C38/001C21C7/06C21D1/18C21D9/0068C22C38/005C22C38/06C22C38/22C22C38/26C22C38/28C23C8/34C23C8/38
Inventor 施红飞王巧洪若冰夏吉显侯卫兵
Owner NINGBO HONGBO MACHINERY MFG
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