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The problems of welding stainless steel 1.4541
Šmarda, Vladimír ; Sigmund, Marian (referee) ; Kubíček, Jaroslav (advisor)
This thesis focuses on austenitic steel welding in the upper part of a steam generator at the nuclear power station Dukovany, and the suitable technology when replacing this part. Part of this thesis is dedicated to the progressive methods TIG, such as the use of hot wire or orbital welding of pipe parts. The experiment in this thesis project tests the optimal parameters setup when welding while using a modified TIG method; a motor-fed hot wire with a welding source from EWM manufacturer was used in this project. Number of NDT tests, along with destructive tests including metallographic tests, demonstrated and verified that the methods, the additional materials and the way the experiment was carried out were chosen correctly and proved effective. These tests also included the hardness of the welding point and TOO locations. The experiment assessment part summarizes the experiment execution, describes the results of the tests, and recommends further continuation in the process toward WPQR
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Welding of steel austenitic
Šmarda, Vladimír ; Mrňa, Libor (referee) ; Kubíček, Jaroslav (advisor)
This thesis deals with welding of austenitic steel, which used in pipelines for liquids in the Dukovany Nuclear Power Station, and suitable technology for welding of joints. Firstly, there is introduced the distinction between the types of stainless steel. Concerning the austenitic steel there are stated their features and defects during welding. Secondly, the bachelor thesis deals with commonly used welding method: MMA, MIG/MAG and TIG, which is most frequently used for weld joints in the Dukovany Nuclear Power Station. A part of the chapter is devoted to progressive TIG methods, such as: use of hot wire and orbital welding of pipelines. In the experimental part, there is solved a proposal for a method and a technique for weld joint between two chambers of tubular cooler. The dimension of the pipeline flange is according to DN 400. It is a butt weld in V-shape with permanent pad on the inside of the pipe, which is welded with TIG method. On the basis of the NDT verification test and also destructive testing, there was proved that the chosen method, technology and additional material were optimal. In the part of experiment evaluation, there were summarized all the results of the tests. Eventually, the suggested weld joint was recommended for realization.
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The problems of welding stainless steel 1.4541
Šmarda, Vladimír ; Sigmund, Marian (referee) ; Kubíček, Jaroslav (advisor)
This thesis focuses on austenitic steel welding in the upper part of a steam generator at the nuclear power station Dukovany, and the suitable technology when replacing this part. Part of this thesis is dedicated to the progressive methods TIG, such as the use of hot wire or orbital welding of pipe parts. The experiment in this thesis project tests the optimal parameters setup when welding while using a modified TIG method; a motor-fed hot wire with a welding source from EWM manufacturer was used in this project. Number of NDT tests, along with destructive tests including metallographic tests, demonstrated and verified that the methods, the additional materials and the way the experiment was carried out were chosen correctly and proved effective. These tests also included the hardness of the welding point and TOO locations. The experiment assessment part summarizes the experiment execution, describes the results of the tests, and recommends further continuation in the process toward WPQR
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Welding of steel austenitic
Šmarda, Vladimír ; Mrňa, Libor (referee) ; Kubíček, Jaroslav (advisor)
This thesis deals with welding of austenitic steel, which used in pipelines for liquids in the Dukovany Nuclear Power Station, and suitable technology for welding of joints. Firstly, there is introduced the distinction between the types of stainless steel. Concerning the austenitic steel there are stated their features and defects during welding. Secondly, the bachelor thesis deals with commonly used welding method: MMA, MIG/MAG and TIG, which is most frequently used for weld joints in the Dukovany Nuclear Power Station. A part of the chapter is devoted to progressive TIG methods, such as: use of hot wire and orbital welding of pipelines. In the experimental part, there is solved a proposal for a method and a technique for weld joint between two chambers of tubular cooler. The dimension of the pipeline flange is according to DN 400. It is a butt weld in V-shape with permanent pad on the inside of the pipe, which is welded with TIG method. On the basis of the NDT verification test and also destructive testing, there was proved that the chosen method, technology and additional material were optimal. In the part of experiment evaluation, there were summarized all the results of the tests. Eventually, the suggested weld joint was recommended for realization.
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