Керченский Государственный Морской Технологический Университет
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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)
Method for producing steel product or steel component having excellent mechanical properties, steel product produced by the method and use of steel pipe made of strain hardened steel
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