Embedded composite casting method

A compound casting and mosaic technology, applied in the field of casting, can solve the problems of poor wettability of reinforcing materials and base materials, unreachable, unreasonable layout, etc., and achieve the effect of excellent comprehensive mechanical properties

Inactive Publication Date: 2012-01-25
NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the mosaic composite casting method in the prior art is relatively easy to realize when manufacturing components with simple shapes, and there are still many problems when manufacturing some components with more complex shapes. Proportion, appropriate size and reasonable layout can be combined with the base material to make the casting achieve high toughness, strength and wear resistance. However, the existing technology has not been able to meet these performance indicators in this regard.
In addition, although the mosaic composite casting method in the prior art can achieve compounding with ferrous metal as the base material, due to many problems such as poor wettability between the reinforcing material and the base material and unreasonable arrangement, the mosaic composite casting The method can not achieve good composite with non-ferrous metal as the base material, which further limits the application scope of the mosaic composite casting method

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0024] This embodiment is the casting of nodular cast iron wear-resistant inserts.

[0025] Based on the shape of the casting and the distribution of working stress, the reinforcement material is selected as cemented carbide, the specific model is YG20, and then the volume of the reinforcement unit is calculated according to the volume of the casting to be 1 / 10 of the volume of the casting to simulate the protrusion characteristics of the shellfish in the intertidal zone and further Simplified to a bionic model containing a circular unit body, processed into a round rod with a diameter of 4mm, and a boss with a height of 0.5mm on the surface of the round rod. Grind the surface of YG20 cemented carbide with sandpaper, then wash with 7% NaOH solution to remove oil, rinse with hot water at 70°C, and rinse with 20% H 2 SO 4 Pickling to remove scale, hot water at 70°C, and then drying at 200°C. Attach the enhanced unit figure 1 The manner shown shows the arrangement within the m...

Embodiment 2

[0027] This embodiment is the casting of magnesium alloy airtight casting.

[0028] According to the shape of the casting and the distribution of working stress, the reinforcement material is selected as carbon steel, the specific model is Q235 steel, and it is processed into a round bar with a diameter of 2mm. Polish the surface with sandpaper, and after cleaning, silver-plate the surface of the reinforcement with an electroless plating method, and the thickness of the silver-plated layer is about 30 nanometers. According to the volume of the casting, the volume of the reinforcement unit is calculated as 1 / 8 of the volume of the casting, and the bamboo fiber is simulated along the radial distribution of the bamboo stem wall. figure 2 The manner shown shows the arrangement within the mold to form a biomimetic reinforced skeleton. Then place the dried cavity in a medium-frequency induction device to preheat to 450°C, then slowly pour the refined AZ91D magnesium alloy melt (at...

Embodiment 3

[0030] This embodiment is the casting of aluminum alloy sliding guide rail.

[0031] According to the shape of the casting and the distribution of working stress, the embedded reinforcement material is selected as alloy steel, the specific model is H13 steel, and it is processed into a sheet of 40mm×20mm×1.5mm as the reinforcement unit. After quenching and tempering, the reinforcement unit simulates the plant blade. Or dragonflies, butterflies and other insect wing features are combined into a image 3 The biomimetic reinforced skeleton shown, and then the surface was polished with sandpaper, followed by alkaline washing with 7% NaOH solution to degrease, rinsing with hot water at 70°C, and 20% H 2 SO 4 Pickling to remove scale, cleaning with absolute ethanol, and then aluminum plating on the surface, the thickness of the aluminum plating layer is about 60 nanometers. According to the volume of the casting, the volume of the reinforced skeleton is calculated as 1 / 6 of the vo...

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Abstract

The invention discloses an embedded composite casting method, which comprises the following steps: selecting the types of reinforcing materials according to the base materials of metal castings and structures which need to be cast, and processing to form reinforcing unit bodies with certain geometric shapes; carrying out pretreatment on the surfaces of the reinforcing unit bodies; assembling the reinforcing unit bodies into a bionic reinforcing skeleton according to the position requirement of inlay casting and the solidifying contraction characters of the base materials, and then, placing the bionic reinforcing skeleton in a casting mould or directly placing the reinforcing unit bodies in the casting mould according to design position to form the bionic reinforcing skeleton; carrying out preheating on the casting mould provided with the bionic reinforcing skeleton; and injecting the base materials liquefied to be liquid into the preheated casting mould to form an embedded composite casting. By adopting the embedded composite casting method, the interface binding of the base materials and the reinforcing materials is good in the composite process. A construction member manufactured by the method is capable of achieving higher toughness, strength and abrasive resistance. Moreover, the embedded composite casting method is not only suitable for carrying out compositing by taking ferrous metals as the base materials but also is suitable for carrying out compositing by taking non-ferrous metals as the base materials.

Description

technical field [0001] The invention relates to the field of casting technology, in particular to a mosaic composite casting method. Background technique [0002] With the continuous development of technical fields such as transportation, communication equipment and aerospace, the requirements for related materials of components are also getting higher and higher. In addition to requiring the material to have good toughness to resist impact during work and prevent accidental fracture of components, the material is also required to have high strength and good wear resistance to ensure the service life of the component. However, it is very difficult for a material to have high toughness and high hardness at the same time in actual production. Studies have shown that introducing a reinforcing phase into the matrix alloy can greatly improve the specific strength, specific stiffness and elastic modulus of the matrix alloy. And other performance indicators, while endowing the bas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D19/02
Inventor 李继强贾志欣刘立君刘文张学昌吴红兵
Owner NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG
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