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Ductile iron casting technology

A casting process, the technology of nodular iron, which is applied in the field of nodular iron casting technology, can solve the problems of low absorption rate of nodularizer, pollution of the operating environment, large amount of nodulizer usage, etc., to improve the working environment, increase the absorption rate, flash and smoke removal effect

Active Publication Date: 2014-02-19
WUJIANG HYDRAULIC COMPONENTS FOUNDRY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing ductile iron casting process has a low absorption rate of the nodulizer due to unstable nodularization reaction, and the molten iron splashes out the nodulizer, resulting in a large amount of nodulizer usage, and at the same time, the operating environment is polluted by flashes and dense smoke during nodularization

Method used

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  • Ductile iron casting technology

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Embodiment Construction

[0034] In order to enable those skilled in the art to better understand the solution of the present invention, and to make the above-mentioned purpose, features and advantages of the present invention more obvious and comprehensible, the present invention will be further described in detail below in conjunction with examples.

[0035] The ductile iron that model is QT500-7 is manufactured by this process now, and this manufacturing process comprises the following steps:

[0036] (1) Spheroidization package preparation:

[0037] a. If figure 1 As shown, the spheroidizing bag includes a spheroidizing bag body 2 for placing molten iron, and a bag cover 4 arranged above the bag body 2. The bag cover 4 is provided with a groove cavity 6, and one end of the bag body 2 bottom is provided with a In the pit 8 of the spheroidization reaction, the other end of the cover 4 located at the pit 8 is provided with a casting liquid inlet 10, which is respectively connected with the cavity mo...

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Abstract

The invention provides a ductile iron casting technology. The technology comprises the following steps: 1, preparation of a nodularization packet comprising a packet body and a packet cover: sequentially casting a nodulizer, an inoculant and a covering agent into the depression in the packet body, and hoisting the packet cover to cover the nodularization packet body; and 2, smelting casting: (1), preparation of a casting liquid comprising 4.2-4.6% of C, 0.95-1.15% of Si, 0.12-0.18% of Mn, 0.034% of P, 0.024% of S, and the balance Fe: heating above raw materials in an electric furnace to a smelting temperature for fully melting alloys to form molten iron, dumping the molten iron into the slot cavity on the packet cover, continuously thrusting the molten iron into the nodularization packet body positioned at the other end of the depression from the inlet of the casting liquid, and carrying out nodularization and inoculation treatment in the nodularization packet to form the casting liquid; and (2), casting the casting liquid into the cavity, and solidifying to form a casting. The casting technology can improve the absorptivity of the nodulizer, reduce the consumption of the nodulizer, reduce the casting cost and realize environment improvement.

Description

technical field [0001] The invention relates to a casting process, in particular to a ductile iron casting process, which belongs to the technical field of casting. Background technique [0002] Ductile iron is one of the most widely used cast iron materials at present. It has the characteristics of high strength, high elongation, strong fatigue resistance and excellent wear resistance. Shipbuilding, metallurgy, chemical industry and other departments. The existing ductile iron casting process has a low absorption rate of the nodulizer due to unstable nodularization reaction, and the molten iron splashes out the nodulizer, resulting in a large amount of nodulizer usage, and at the same time, the operating environment is polluted by flashes and dense smoke during nodularization . Contents of the invention [0003] In order to solve the deficiencies in the background technology, the purpose of the present invention is to overcome the defects of the background technology, p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C37/04C22C33/08C22C37/10B22D1/00
Inventor 浦傲天
Owner WUJIANG HYDRAULIC COMPONENTS FOUNDRY
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