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Hydraulic hammer head and preparation method thereof

A technology of hydraulic breaker and cermet, which is applied in the directions of additive manufacturing, mechanically driven excavators/dredgers, earthmovers/shovels, etc. Poor anti-corrosion performance and other problems, to achieve the effect of reducing early scrap, improving process performance, and high bonding strength

Inactive Publication Date: 2016-12-21
四川中久红宇科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of the practical applicability of the hydraulic crushing hammer, the physical performance requirements of the hydraulic crushing hammer are also relatively high, such as its wear resistance, toughness and corrosion resistance are important indicators that need to be investigated in the actual use process, but now hydraulic crushing Hammers generally have poor anti-corrosion performance. Due to the corrosion of oxides and acid gases during application, the actual service life of hydraulic crushing hammers will be shortened. Other physical properties of hydraulic crushing hammers, such as toughness and strength, are not ideal. The value of its application is indirectly limited, and the scope of use will be limited accordingly

Method used

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  • Hydraulic hammer head and preparation method thereof
  • Hydraulic hammer head and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The preparation method of the hydraulic breaking hammer head is as follows:

[0033] Mix 10g of chromium, 5g of silicon, 30g of iron, 5g of carbon, 30g of nickel, 1g of molybdenum, and 1g of tungsten to make a cermet mixed powder with a mesh size of 200 mesh or more, and use a 3D printer to generate high-energy particle beams to achieve cermet mixing Powder fusion with an energy density of 90J / mm for the high-energy particle beam 2 , the laser melting time is 2 minutes. After the melting is completed, the cermet is sprayed on the steel surface of the hydraulic crushing hammer base with a 3D printer to form a dense cermet layer. It is integrally formed without splicing gaps and has stronger stability.

Embodiment 2

[0035] The preparation method of the hydraulic breaking hammer head is as follows:

[0036] Mix 30g of chromium, 12g of silicon, 40g of iron, 13g of carbon, 40g of nickel, 2g of molybdenum, and 2g of tungsten to make a cermet mixed powder with a mesh size of 300 mesh. The mixing rate is controlled at 300rad / min, and a 3D printer is used to produce high-energy particles. The beam realizes the melting of metal-ceramic mixed powder, and the energy density of the high-energy particle beam is 100J / mm 2 , the time of laser melting is 3min. After the melting is completed, the cermet is sprayed on the steel surface of the hydraulic crushing hammer base with a 3D printer to form a dense cermet layer. The thickness of the cermet layer is 1.6mm. The hammer head base is composed of three layers: metal layer, metal-ceramic composite layer, and ceramic layer from inside to outside. It is integrally formed, without splicing gaps, and has stronger stability.

Embodiment 3

[0038] The preparation method of the hydraulic breaking hammer head is as follows:

[0039] Mix 15g of chromium, 7g of silicon, 32g of iron, 6g of carbon, 30g of nickel, 1.2g of molybdenum, and 1.2g of tungsten to make a cermet mixed powder with a mesh size of 200 mesh. The mixing rate is controlled at 100rad / min, and it is produced by a 3D printer. The high-energy particle beam realizes the melting of metal-ceramic mixed powder, and the energy density of the high-energy particle beam is 120J / mm 2 , the laser melting time is 2.5min. After the melting is completed, the cermet is sprayed on the steel surface of the hydraulic crushing hammer base with a 3D printer to form a dense cermet layer. The thickness of the cermet layer is 1.7mm. The base of the crushing hammer is composed of three layers: ceramic layer, metal-ceramic composite layer and metal layer from the inside to the outside. It is integrally formed without splicing gaps and has stronger stability.

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Abstract

The invention provides a hydraulic hammer head. The hydraulic hammer head comprises a hydraulic hammer head body. A metal ceramic layer with a gradient structure is covered on the surface of the hydraulic hammer head body. The metal ceramic layer is formed by painting through a 3D printer and comprises, by weight, 10-30 parts of chromium, 5-12 parts of silicon, 30-40 parts of iron, 5-13 parts of carbon, 30-40 parts of nickel, 1-2 parts of molybdenum and 1-2 parts of wolfram. The preparation method of the hydraulic hammer head body comprises the steps that (A) all raw materials forming the metal ceramic layer are mixed and stirred evenly to prepare mixed powder; and (B) the mixed powder is laser-melted by a high-energy beam of particles generated by the 3D printer, and is painted to the surface of the hydraulic hammer head body by the 3D printer. The hydraulic hammer head is largely improved in physical performance such as corrosion resistance, toughness and rigidity and good in stability.

Description

technical field [0001] The invention relates to the field of hydraulic crushing hammer processing, in particular to a hydraulic crushing hammer and a preparation method thereof. Background technique [0002] The hydraulic breaker is referred to as "breaker" or "breaker". The power source of the hydraulic breaker is the pressure provided by the excavator, loader or pump station. It can break stones and rocks more effectively during engineering construction, and improve work efficiency. The principle of choosing a hydraulic breaker is to choose the most suitable hydraulic breaker according to the model of the excavator and the working environment. It can be seen that the application of hydraulic breaker is very extensive, and its practical application value is relatively high. The hydraulic breaker hammer head is the core component of the breaker, and its performance directly affects the application value of the breaker. [0003] In view of the practical applicability of th...

Claims

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Application Information

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IPC IPC(8): B22F7/02B22F3/105B33Y10/00B33Y80/00E02F3/96
CPCE02F3/966B22F7/02B33Y10/00B33Y80/00B22F10/00B22F10/36B22F10/22B22F10/34Y02P10/25
Inventor 李信鲁伟员杨义乐
Owner 四川中久红宇科技有限公司
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