Experimental and Numerical Analysis of Deep Cryogenically Treated Weldox700 Steel Used Hatch Opening Crane Hooks

ŞENGÜL Ö., Kam M.

JOURNAL OF THE CHINESE SOCIETY OF MECHANICAL ENGINEERS, cilt.47, sa.2, ss.157-164, 2026 (SCI-Expanded)

Özet

In this study, a special hook for hatch opening cranes, which provide the opening and closing of the hatches in the hold areas of ships, has been designed. The static analysis of the modelled special crane hook was carried out using the Finite Element Method (FEM) to determine the negative effects on the hook under static loading conditions. High strength Weldox700 steel was used for the hook material. To improve the mechanical properties of the hook, Conventional Heat Treatment (CHT), complementary by Deep Cryogenic Treatment (DCT), Deep Cryogenic Treatment and Tempering (DCTT) were applied. After these heat treatments, some mechanical properties of the test samples were analysed for the improvement of the material strength of the hook and the sample with optimum improvement was selected. As a result of the study, experimental data were analysed using the ANSYS 2019 R2 analysis program with the FEM analysis to determine the safety factor of the yield strength of the hook under the loading conditions of the hook. After the heat treatment of the test samples, there was an improvement of 59.71% in yield strength and 33.58% in tensile strength. Under the loading conditions of the hook, it has shown 6.37 times safety factor after DCT process.