engleski

Investigation of the influence of improvement on the effect of strain hardening of 34CrMo4 in the production of seamless steel pressure vessels from pipes

This paper analyzes the process of making a seamless pressure vessel Ø229 mm on a spinning machine. The pressure vessels are exposed to high operating pressure when in use (up to 200 bar). Therefore, the material of the pressure vessels must meet specific requirements to prevent cases of disaster and damage. It is required to pass a burst test on one out of the 200 pressure vessels. If the burst test meets the requierements and demands, a pressure vessel is randomly selected from the same batch, and is used to make the test samples for testing the mechanical properties. Only if these results meet the standard prescribed limits, the pressure vessels can be delivered to the user. The purpose these tests, by controlling the mechanical properties of samples made from the finished pressure vessels before and after heat treatment by improving 34CrMo4 steel, and comparing them with the required standard values, is to assess the technological parameters and possible approaches in future research that could contribute to the reliability of pressure vessels in use.

seamless pressure vessel

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