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Nodular cast iron foundation pile pipe and a method for preparing same

a technology of nodular cast iron and pile pipe, which is applied in the direction of furnaces, heat treatment equipment, manufacturing tools, etc., can solve the problems of long construction time and high labor intensity, and achieve the effects of high strength, effective improvement of mechanical properties of cast iron, and high strength

Inactive Publication Date: 2015-08-20
YU PEI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention uses nodular cast iron as the material of the pile pipe, which results in improved mechanical properties, including plasticity and toughness, and higher strength than carbon steel. This makes it suitable for components that bear complicated forces and require high strength, toughness, and abrasion resistance. By integrating the flange and foundation pile pipe, the overall strength is enhanced. The invention also has advantages such as corrosion resistance, long service life, low manufacturing cost, low labor intensity, short construction period, and being suitable for mechanized construction and scale production.

Problems solved by technology

The technical problem addressed in this patent text is the need for a faster and more efficient way to construct reinforced concrete foundations, as the traditional method requires a lot of labor and time. The solution proposed is the use of a pile pipe, which can be directly mounted to a pole on the ground, eliminating the need for a big hole and pre-buried reinforcing steel bars. The connection between the pile pipe and the flange is made through welding, using a specific material and process.

Method used

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  • Nodular cast iron foundation pile pipe and a method for preparing same
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Embodiment Construction

[0032]A nodular cast iron foundation pile pipe and a technology for preparing same, the technology comprises following steps:

[0033](1) preparation before pipe casting: including molten iron preparation, spheroidization and coating spraying on an inner wall of a pipe mold,

[0034]wherein the molten iron preparation includes heating the molten iron with medium frequency furnace to a temperature of 1460° C.-1500° C., and mass fractions of main chemical compositions in the molten iron are:

[0035]C: 2.9-3.2%, Si: 1.4-1.6%, Mn≦0.5%, Ti≦0.04%, P≦0.06%, S≦0.020%; the spheroidization includes using any of pour-over method, wire feeding spheroidizing method or pure magnesium spheroidizing method to spherize the molten iron, mass fractions of main chemical compositions in the spheroidized molten iron are:

[0036]C: 3.0-3.3%, Si: 1.9-2.4%, Mn≦0.5%, P≦0.06%, S≦0.02%, Mg: 0.03-0.06%, Ti≦0.04%; and the spheroidized molten iron is set aside for later use after slag removal;

[0037]the pipe mold is a die u...

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Abstract

The present invention provides a nodular cast iron foundation pile pipe and a method for preparing same, including following steps: (1) preparation before pipe casting: including molten iron preparation, spheroidization and coating spraying on an inner wall of a pipe mold; (2) pipe casting process: including centrifugal casting and pipe drawing; (3) annealing process; (4) finishing process. The present invention further provides the foundation pile pipe manufactured with the above-mentioned method wherein the flange and the foundation pile pipe are integrally cast or welded. In the present invention, the nodular cast iron is used as the material of the foundation pile pipe instead of Q345 steel used in the prior art. As a result, the overall strength is enhanced. The present invention possesses advantages such as corrosion resistance, long service life, low manufacturing cost, low labor intensity, short construction period and being suitable for mechanized construction.

Description

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Claims

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Application Information

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Owner YU PEI
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