Title: Manufacturing technique of heavy caliber alloy seamless steel pipe
Application Number: 200610041523 Application Date: 2006.09.11
Publication Number: 1919530 Publication Date: 2007.02.28
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: B23P23/04;B21B19/04;B21B19/08;B21B19/10;B21B37/00;C21D9/08
Applicant(s) Name: He Long Address:
Inventor(s) Name: He Long
Attorney & Agent:
Abstract:
    The invention discloses a manufacturing technology of large-aperture alloy seamless steel pipe, which comprises the following steps: 1. preparing materials, 2. heating pipe mould, rolling inclinedly, piercing, 3. trimming capillary tube, 4. deforming to change aperture through heat expansion, 5. disposing through heat, 6. flattening, 7. grinding internally, 8. correcting, 9. grinding externally, 10. detecting flaw, 11. trimming finely, detecting finally, packing.
Time: 14