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Double-fluid composite iron-based bimetal casting method

A bimetallic and iron-based technology, which is applied in casting molding equipment, metal processing equipment, casting molds, etc., can solve the problems of large amount of double-liquid composite fusion and high rejection rate of bimetallic composite, and achieves the expansion of the range of process parameters and facilitates industrialization High-production, easy-to-control effects

Inactive Publication Date: 2017-05-10
邢振国
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Problems solved by technology

[0005] In order to solve the problem that the double-liquid composite fusion amount is too large, resulting in a high rejection rate of bimetallic composites, the present invention provides a method for cold iron fast cooling double-liquid casting composite iron-based bimetallic materials

Method used

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Embodiment

[0014] Example: 500×500×50mm composite wear-resistant plate

[0015] The bimetal composite wear plate is made of low carbon cast steel and high chromium cast iron, and its composition is shown in the table below. The finished product requires high chromium cast iron layer thickness 25-35mm, hardness requirement ≥55HRC, low carbon cast steel thickness 15-25mm, impact toughness not less than 50J.

[0016]

[0017] Process analysis: Comparing the composition of low-carbon cast steel and high-chromium cast iron in the above table, it can be seen that the composition of Si, Mn, P and S after fusion has little change, mainly due to the change of C, Ni and Cr. In terms of the physical properties of the two, the thermal conductivity of low-carbon cast steel is higher than that of high-chromium cast iron. High-chromium cast iron, so low-carbon cast steel with a high melting point is used as the first layer of metal, and high-chromium cast iron with a low melting point is used as th...

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Abstract

The invention discloses a double-fluid composite iron-based bimetal casting method. The melting point of metal of a first layer is not lower than that of metal of a second layer; after the metal of the first layer is poured, a low-carbon steel chiller is used for fast cooling; after cooling is conducted to obtain a certain temperature, the metal of the second layer is poured, and the pouring temperature of the metal of the second layer is not lower than the melting point of the metal of the first layer; and fusion of the metal of the two layers is ensured. Due to the fact that the chiller fast cooling method is adopted, the fusion amount of the metal of the first layer is reduced, components of the metal of the second layer are ensured, and a bimetal composite workpiece with metallurgical bonding is obtained. According to the technological method, the fusion amount of the metal of the first layer is reduced, the components obtained after fusion of the metal of the second layer are ensured, the double-fluid composite qualification rate is increased, and industrial mass production is facilitated.

Description

technical field [0001] The invention relates to a manufacturing method of a bimetal composite material, specifically a method for liquid-liquid composite iron-based bimetal. Background technique [0002] Cast iron-based bimetallic composite materials mostly use solid-liquid composite and liquid-liquid composite, liquid-liquid composite is mostly used for centrifugal casting of bimetallic composite pipes, and solid-liquid composite is mostly used for bimetallic composite workpieces of various shapes. Each has its flaws and advantages. [0003] Solid-liquid compounding is suitable for bimetallic workpieces with irregular composite surfaces, but since the metal liquid can hardly melt the iron-based solid metal, the composition of the bimetallic material, especially the composition of the second layer of iron-based metal, is guaranteed, but this method produces The binding force of the iron-based bimetal workpiece is very weak, and the composite structure is often relied on to ...

Claims

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Application Information

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IPC IPC(8): B22D19/16B22D15/00B22D27/04B22C9/08
CPCB22C9/082B22D15/00B22D19/16B22D27/04
Inventor 邢振国齐自新常连波郭继伟梁顺星
Owner 邢振国
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