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Composite material tamping tine and preparation method thereof

A composite material and composite material layer technology, which is applied in the field of composite material stamping and its preparation, can solve problems such as defects in the bonding surface, affecting metal bonding, and poor temperature control, achieving good interface bonding, prolonging service life, and moisturizing good moisture effect

Inactive Publication Date: 2015-09-02
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the body of the tamping pick and the palm of the pick form a metallurgical bond, the temperature is not well controlled during the casting process. If the temperature of the molten metal poured in first is too high or too low, it will affect the bonding of the two metals; There will be impurities on the upper surface of the molten metal in the cavity, and when it contacts with the molten metal after casting, defects will be formed on the bonding surface; when the hammer is working, cracks will be generated at the defects, resulting in fracture
The hardness is HRC68, and the general tamping mileage is about 30-40 kilometers, and it cannot be repaired after failure, and the cost is high

Method used

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  • Composite material tamping tine and preparation method thereof
  • Composite material tamping tine and preparation method thereof
  • Composite material tamping tine and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Such as Figures 1 to 4 As shown, the composite material tamping pick includes a pick body 1 and a pick palm 2, and a layer of ceramic particle-reinforced metal matrix composite material layer 3 is wrapped on the surface of the pick palm 3, and the thickness of the ceramic particle-reinforced metal matrix composite material layer 3 is It is 10mm, and the ceramic particles are WC, and the particle size is 150μm. The volume fraction of ceramic particles in the ceramic particle reinforced metal matrix composite material is 50%, and the rest of the matrix is ​​the same as the material of the pick body, which is high chromium cast iron.

[0031] The preparation method of the composite material stamp pick described in the present embodiment, as image 3 , 4 As shown, the specific steps are as follows:

[0032] (1) A mixed solution of WC particles with a particle size of 150 μm, water glass solution and polyvinyl alcohol solution (the content of the mixed solution is 3% of t...

Embodiment 2

[0037] Such as Figures 1 to 4 As shown, a layer of ceramic particle reinforced metal matrix composite material is wrapped on the surface of the palm of the composite material tamping pick. The thickness of the composite layer is 15mm, and the ceramic particle is B 4 C, the particle size is 380 μm, the volume fraction of ceramic particles in the ceramic particle reinforced metal matrix composite material is 55%, and the remaining matrix is ​​the same as the material of the pick body, which is 40Cr.

[0038] The preparation method of the composite material stamp pick described in the present embodiment, as image 3 , 4 As shown, the specific steps are as follows:

[0039] (1) B with a particle size of 380 μm 4 C particles and aluminum phosphate solution (content is 4% of the mass fraction of ceramic particles) are put into a ball mill tank, uniformly mixed on the ball mill for 60min, and then the uniformly mixed particles are filled into the prefabricated body mold 8. 2 Cal...

Embodiment 3

[0044] Such as Figures 1 to 4 As shown, a layer of ceramic particle reinforced metal matrix composite material is wrapped on the surface of the palm of the composite ramming pick. The thickness of the composite layer is 9mm, and the ceramic particles are Cr 3 C 2 , the particle size is 120μm, the volume fraction of ceramic particles in the ceramic particle reinforced metal matrix composite is 45%, and the rest of the matrix is ​​the same as the material of the pick body, which is 40CrNiMo.

[0045] The preparation method of the composite material stamp pick described in the present embodiment, as image 3 , 4 As shown, the specific steps are as follows:

[0046] (1) Cr with a particle size of 120 μm 3 C 2 The particles and the aluminum dihydrogen phosphate solution (the content is 3.5% of the mass fraction of the ceramic particles) are put into a ball mill tank, uniformly mixed on the ball mill for 90 minutes, and then the uniformly mixed particles are filled into the pr...

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Abstract

The invention discloses a composite material tamping tine and a preparation method thereof, and belongs to the technical field of preparation of components and parts. The composite material tamping tine comprises a tine body and a tine palm, wherein a layer of ceramic particle reinforcement metal matrix composites wraps the peripheral surface of the tine palm, the ceramic particle reinforcement metal matrix composite layer is 5-20mm in thickness, a volume fraction of particles is 20%-80%, the tine body is a metal matrix, the tine palm and the tine body are connected together through welding, and the tine palm of the composite material tamping tine is prepared through a pressure casting method. The composite material tamping tine is high in hardness, has high abrasion resistance and impact performance, comprises a thick abrasion resisting layer which can not fall off, greatly prolongs use life, substantially improves work efficiency of a tamper, is compact and flawless in tissue and good in synthesized mechanical performance by adopting a pressure casting method, and furthermore is simple in technology, low in cost, and capable of obtaining great economic benefit.

Description

technical field [0001] The invention relates to a composite material tamping pick and a preparation method thereof, belonging to the technical field of parts preparation. Background technique [0002] Railway road maintenance machinery plays an important role in the construction and maintenance of the line. The tamping car is mainly used to tamp the ballast on the railway track bed, and the tamping pick is the most important part of the tamping car, and it is also the replacement of the road maintenance machinery. One of the parts with the most frequent parts. In the maintenance of railway lines, the use of tamping picks is large, not only to bear the impact load, but also to resist abrasive wear and impact wear. The failure of tamping picks is mainly manifested in the wear of the pick palm and the fracture of the pick body, while ceramic particle reinforced metal matrix composites have excellent wear resistance and impact resistance, and are low in cost and simple in proce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D19/16B22D18/02E01B27/13
Inventor 卢德宏李海舟包昂赵馨月
Owner KUNMING UNIV OF SCI & TECH
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