Керченский Государственный Морской Технологический Университет
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Priority to UAU201301579UpriorityCriticalpatent/UA83624U/en
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A method for increasing strength of pipes comprises heating the steel sheet to a temperature A+ (30-50) °C for manufacturing the pipe, followed by two-sided cooling at the same rate, providing producing the structures by hardening and tempering. Only one surface of the sheet is cooled. The sheet is bent in the process of pipe producing so that this sheet surface is inner.
UAU201301579U2013-02-112013-02-11Method for increasing strength of pipes
UA83624U
(en)
THIN STEEL SHEET, PLATED STEEL SHEET, METHOD FOR MANUFACTURING HOT ROLLED STEEL SHEET, METHOD FOR MANUFACTURING VERY HARD COLD LAMINATED STEEL SHEET, METHOD FOR MANUFACTURING THIN STEEL SHEET, AND METHOD FOR PRODUCING PLATED STEEL SHEET
A hardening method of a steel pipe, a hardening device of a steel pipe, a manufacturing method of a steel pipe, and production equipment of a steel pipe