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The investigations described in the paper were related to the determination of the characteristics of a cylinder in the heat treatment to the temperature of 550 °C. The paper describes the design and principle of operation of the test stand. When preparing the experimental research, the authors included different forms of heat flow and their influence on the uneven cylinder heating. A forced flow of gas has been analyzed along with its impact on the heat flow in the tested cylinder. The investigations discussed in this paper aimed at finding the cross-section of the cylinder in which the heat conductance could be limited to radial direction. Distribution of temperatures has been analyzed during the heating process on the entire length of the cylinder. The results obtained in the experimental research will constitute a basis for the calculations of temperature distribution inside the cylinder during the heat treatment with the use of the inverse problem method.

Rolling path squeezes and rolling residual stresses of large diameter circular saw body for wood, generated by rolling pressure from 10 up to 120 bar were examined. X-ray diffraction, Barkhausen noise (BN) and Full Width of the peak at a Half Maximum (FWHM) ( o ) methods for evaluation of residual stresses were used. Dependencies of a tangential rolling residual stresses inside rolling paths upon rolling pressure p (bar) and rolling area A (mm 2 ) were evaluated. The rolling pressure, as large as 60 bar, resulting in the rolling squeeze as high as 0.04 mm 2 , and, tangential residual compression stresses inside a rolling path, as large as  TI = −822 MPa, was considered to be the largest for the practical application.

This paper shows a method of programming the NiTinol springs by heating them up in the furnace chamber filled with technical nitrogen. A fully specified methodology, which consists of preparing the spring forms, the numerical analysis of the heating time and the description of the heating process are presented in this article. The effectiveness of the following method is confirmed using research of shape retention after a series of duty cycles performed by an activated NiTinol spring.