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Title:
PROCESS FOR PREPARING SPHEROIDAL GRAPHITE CAST IRON SCREW PILE AND SPHEROIDAL GRAPHITE CAST IRON SCREW PILE PREPARED USING SAID PROCESS
Document Type and Number:
WIPO Patent Application WO/2018/214782
Kind Code:
A1
Abstract:
A process for preparing a spheroidal graphite cast iron screw pile, comprising the steps of pre-pile-casting preparation, pile casting, heat treatment, and finishing. Further disclosed is a spheroidal graphite cast iron screw pile prepared using the spheroidal graphite cast iron pile preparation process, comprising a guide pipe, the lower end of the guide pipe having a slope apex, and at least two spirally rising rotors being arranged along the axis of the guide pipe, the guide pipe being a straight guide pipe, an inverted cone guide pipe, or a profile guide pipe. The spheroidal graphite cast iron screw pile has tensile strength of not less than 420-500 MPa and elongation of not less than 7-10% and features strong corrosion resistance and long service life.

Inventors:
YU, Yifei (4-1-901, B3 Xinghai Square, Shahekou Distric, Dalian Liaoning 3, 116023, CN)
Application Number:
CN2018/086827
Publication Date:
November 29, 2018
Filing Date:
May 15, 2018
Export Citation:
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Assignee:
SEAMLESS (DALIAN) TECHNOLOGY CO., LTD (4-1-901, B3 Xinghai Square, Shahekou Distric, Dalian Liaoning 3, 116023, CN)
International Classes:
C21C1/10; C22C33/08; E02D5/56
Foreign References:
CN106987761A2017-07-28
CN104087820A2014-10-08
CN201531022U2010-07-21
CN205134308U2016-04-06
CA2542166A12007-10-06
CN201236338Y2009-05-13
JP2013163890A2013-08-22
CN101716666A2010-06-02
Attorney, Agent or Firm:
DALIAN EAST PATENT AGENT LTD. (Room 608, No. 263 Huanghe Road Xigang Distric, Dalian Liaoning 1, 116011, CN)
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