SVIBOR - Project code: 2-08-013

MINISTRY OF SCIENCE AND TECHNOLOGY

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Project code: 2-08-013

STRENGTHENING OF STEEL WELDING JOINTS, STEEL CASTINGS AND OTHER STEEL PRODUCTIONS BY THERMAL CYCLING TREATMEN

Main researcher: SMOLJAN, BOŽO (108601)

Assistants

JURKOVIĆ, MILAN (205935)

Type of research: applied
Duration from: 01/01/91. to 12/31/95.

Papers on project (total): 21

Institution name: Tehnički fakultet, Rijeka (69)
Department/Institute: Department of Technology and Organization
Address: N. ustnka 58
City: 51000 - Rijeka, Croatia

Communication: Phone: 385 (0)51 32 844

Summary: The possibility of strengthening of steel productions - welding joints, steel casting and other steel productions by thermal cycling treatment has been investigated. The dependence of constructive strength and the behaviour of steel on occasion of quenching, on structure of steel, and particularly, on prior austenitic grain size has been analysed. The microstructure modifications rising in steel during the thermal cycling treatment with combination of diffusion and non-diffusion transformations of steel, have been investigated. Based on steel, welding joints and steel casting properties and the analysis of existing possibilities of the thermal cycling treatment, the basic thermal cycling treatments of steel productions have been established. The optimization of the steel strengthening by thermal cycling treatment has been done. The role of particular parts of the thermal cycling treatment on steel strengthening has been investigated, and optimization of the parameters of the mentioned heat treatment has also been done as well. Concrete thermal cycling treatments have been established on the basis on experimental and theoretical investigations.

Keywords: Steel, Heat Treatment, Thermal Cycling Treatment, Welding Joints, Steel Castings, Steel for Quenching and Tempering, Yield Strength, Fracture Toughness, Toughness

Research goals: The Goals are: To establish a basic thermal cycling treatments, To improve a thermal cycling treatments, Based on analysis of steel productions properties to establish some new thermal cycling treatments, To evaluate a possibility of steel strengthening by thermal cycling treatment, To widen application of the thermal cycling treatments in technics.

Other information about the project.


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