Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Effect of heat input on the mechanical properties of butt-welded steel joints : Tensile and hardness test
The purpose of this Bachelor thesis was to study the effects of heat input on the mechanical properties of butt welded steel joints. The effects of heat during the cooling period on the microstructure of the steel have not been extensively researched. The aim of this research was to provide information that can be used as a resource for further research and also to give recommendations on how to optimize and preserve the strength of steel during butt welding. Four steel types were chosen (S420, S500, S700 and S960). They were welded with varied heat input and different numbers of weld runs. The temperature and cooling time of the HAZ (Heat affected zone) were recorded through an infrared camera. A reference model was made with thermocouple and infrared camera to accurately calculate the cooling time of each specimen. After the correlation between the temperature recorded through infrared camera and thermocouple was established, the steel plates were welded. Tensile and hardness tests were conducted on the welded specimens. The results showed the effects of heat input and cooling time on the mechanical properties of the welded joints. Different heat input has a direct correlation on the reduction of the strength of the HAZ. It also showed that improper welding technique can affect the strength of the specimens. The research gives a recommendation on how the setting up of the future researches should be done and identifies the areas that need further study.
Effect of heat input on the mechanical properties of butt-welded steel joints : Tensile and hardness test
The purpose of this Bachelor thesis was to study the effects of heat input on the mechanical properties of butt welded steel joints. The effects of heat during the cooling period on the microstructure of the steel have not been extensively researched. The aim of this research was to provide information that can be used as a resource for further research and also to give recommendations on how to optimize and preserve the strength of steel during butt welding. Four steel types were chosen (S420, S500, S700 and S960). They were welded with varied heat input and different numbers of weld runs. The temperature and cooling time of the HAZ (Heat affected zone) were recorded through an infrared camera. A reference model was made with thermocouple and infrared camera to accurately calculate the cooling time of each specimen. After the correlation between the temperature recorded through infrared camera and thermocouple was established, the steel plates were welded. Tensile and hardness tests were conducted on the welded specimens. The results showed the effects of heat input and cooling time on the mechanical properties of the welded joints. Different heat input has a direct correlation on the reduction of the strength of the HAZ. It also showed that improper welding technique can affect the strength of the specimens. The research gives a recommendation on how the setting up of the future researches should be done and identifies the areas that need further study.
Effect of heat input on the mechanical properties of butt-welded steel joints : Tensile and hardness test
Pham Nguyen, Vu (Autor:in) / Hämeen ammattikorkeakoulu
01.01.2018
10024/1771
Hochschulschrift
Elektronische Ressource
Englisch
DDC:
690
Fatigue properties of titanium-clad bimetallic steel butt-welded joints
| Elsevier | 2024
| British Library Online Contents | 2011