Mosaic compound casting method

A compound casting and mosaic technology, which is applied in the field of casting, can solve the problems of poor wettability of reinforcing materials and substrates, failure to achieve, limit the application range of mosaic compound casting methods, etc., and achieve the effect of excellent comprehensive mechanical properties

Inactive Publication Date: 2019-06-14
合肥四维铸造有限公司
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  • Abstract
  • Description
  • Claims
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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
Comparison scheme
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, wash with hot water at 70°C, pickle with 20% H2SO4 to remove scale, hot water at 70°C, and then dry at 200°C. Attach the enhanced unit figure 1 The manner shown shows the arrangement within the mould. Dry the mold c...

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 polished the surface with sandpaper, followed by alkaline washing with 7% NaOH solution to degrease, rinsing with hot water at 70°C, pickling with 20% H2SO4 to remove scale, cleaning with absolute ethanol, and then aluminum plating on the surface, The aluminum layer is about 60 nanometers thick. According to the volume of the casting, the volume of the reinforced skeleton is calculated as 1 / 6 of the volume of the casting, and t...

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Abstract

The invention provides a mosaic compound casting method. The mosaic compound casting method comprises the steps that a type of a reinforcing material is selected according to a base material and a to-be-casted structure of a metal casting part, and a reinforcing unit body in a certain geometric shape is machined and molded; the surface of the reinforcing unit body is pretreated; according to position requirements of mosaic casting and the solidification contraction characteristic of the base material, the reinforcing unit body is assembled into a bionic reinforcing skeleton and then placed ina mold, or the reinforcing unit body is directly placed in the mold according to a designed position to form a bionic reinforcing skeleton; the mold with the bionic reinforcing skeleton is preheated;and the base material liquidized into a liquid state is injected into the preheated mold to form a mosaic composite casting part. According to the mosaic compound casting method, the interface betweenthe base material and the reinforcing material is well combined in the compounding process, and a member manufactured by the method mosaic compound casting method can achieve high toughness, strength, and wear resistance; and the mosaic compound casting method is suitable for compounding with ferrous metal as the base material and compounding with non-ferrous metal as the base material.

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): B22D19/16B22D19/02
Inventor 罗海洋
Owner 合肥四维铸造有限公司
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