Spheroidal graphite cast iron foundation pile pipe and preparation process thereof

A ductile iron and preparation process technology, which is applied in basic structural engineering, manufacturing tools, sheet pile walls, etc., can solve the problems of long construction time and high labor intensity, and achieve the effects of short construction period, low labor intensity and low production cost.

Active Publication Date: 2013-12-25
RAHIM RICE DALIAN TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The labor intensity is high and the construction time is long; the pile pipe foundation is formed by directly pressing the pile pipe below the ground with a pile driver, and then directly installs the pole on the ground

Method used

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  • Spheroidal graphite cast iron foundation pile pipe and preparation process thereof
  • Spheroidal graphite cast iron foundation pile pipe and preparation process thereof

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Embodiment Construction

[0034] A ductile iron foundation pile pipe and a preparation process thereof, comprising the following steps:

[0035] ①Preparation before casting pipe: including molten iron preparation, spheroidizing treatment and spraying paint on the inner wall of the pipe mold;

[0036] The molten iron is prepared by heating the molten iron with an intermediate frequency electric furnace, and the temperature of the molten iron is raised to 1460°C-1500°C. The mass fraction of the main chemical components in the molten iron is as follows:

[0037] C: 2.9-3.2%, Si: 1.4-1.6%, Mn≤0.5%, Ti≤0.04%, P≤0.06%, S≤0.020%;

[0038] The spheroidizing treatment is to spheroidize the molten iron in one of the ways of the flushing method, the wire feeding spheroidization method or the pure magnesium spheroidization method. After the spheroidization, the mass fraction of the main chemical components in the molten iron is as follows:

[0039] C: 3.0-3.3%, Si: 1.9-2.4%, Mn ≤ 0.5%, P ≤ 0.06%, S ≤ 0.02%, Mg: 0...

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Abstract

The invention discloses a spheroidal graphite cast iron foundation pile pipe and a preparation process thereof. The preparation process comprises the following steps: (1) preparing before pipe casting, namely preparing molten iron, spheroidizing and spraying paint onto the inner wall of a pipe mould; (2) carrying out pipe casting, namely carrying out centrifugal casting and pipe drawing; (3) annealing; (4) finishing. The invention further discloses the foundation pile pipe prepared by the process; the foundation pile pipe comprises a pipe body and a flange plate arranged at the end part of the pipe body; the flange plate and the foundation pile pipe are formed by integral casting or welding. According to the spheroidal graphite cast iron foundation pile pipe, the foundation pile pipe is made of spheroidal graphite cast iron instead of Q345 materials in the prior art, and the flange plate and the pipe body are formed by integral casting or welding, so that the overall strength is enhanced; the spheroidal graphite cast iron foundation pile pipe has the advantages of corrosion resistance, long service life, low manufacturing cost, low labor intensity, short construction cycle, suitability for mechanical construction and the like.

Description

technical field [0001] The invention relates to a foundation pile pipe and its casting process, in particular to a nodular cast iron foundation pile pipe and its preparation process. Background technique [0002] The pile pipe is the pipe used for the pile foundation, which is pressed into the ground as the foundation, and its flange is used to connect the column on the ground, usually by bolts. Pile pipes are used to replace traditional reinforced concrete foundations. When constructing the cement foundation, it is necessary to dig a large pit first, bury the steel bars before pouring cement mortar, and then cure it until the specified time before it can be used. The labor intensity is high and the construction time is long; the pile pipe foundation is formed by directly pressing the pile pipe below the ground with a pile driver, and then directly installs the pole on the ground. This process is suitable for mechanized construction, with low labor intensity and short cons...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C37/10B22D13/02E02D5/66
CPCB22D13/02E02D5/66C22C37/10C22C28/00C22C33/08C22C37/04C21D5/00C21D8/105C21D9/08E02D5/285E02D27/12
Inventor 于佩
Owner RAHIM RICE DALIAN TECH
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