書誌事項
- タイトル別名
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- Prediction and Prevention of Liquid Zinc Induced Cracking in Tubular Structures of 590MPa Steel Based on Elastic-Plastic-Thermal Stress Analysis
- 590MPaキュウ コウカン コウゾウブツ ノ ヨウユウ アエンメッキゼイ カ ワレ ニ タイスル ダン ソセイ ネツ オウリョク カイセキ ニ モトヅク ヨソク ト ボウシ タイサク
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説明
This paper describes a prediction method for liquid zinc induced cracking at the toe of fillet weld between thin tube of 590MPa steel and thick ring-plate during hot-dip galvanizing. Design conditions to prevent cracking in such structures are also suggested. To investigate the cracking mechanism in the above structures, elastic-plastic-thermal stress analyses (FEM) were performed at three processes of galvanizing : dipping into molten zinc, air-cooling and water-cooling. The results are summarized as follows. (1)The strain under tensile stressing is accumulated at the toe of fillet weld, by the deformation of the tube due to the temperature difference between the tube and ring-plate during galvanizing. (2)The final accumulated strain (εfa) and the critical strain for crack initiation (εca) could be estimated by the three parameters of tubular structures : thickness ratio of the ring-plate to the steel tube (tr⁄tp), stress concentration factor of fillet weld (kt) and carbon equivalent for zinc induced cracking (CEZ) . (3)The hypothesis that a crack might be initiated when εfa exceeds εca is validated by reviewing the results of the experiments conducted before under variuos conditions. (4)To prevent a crack initiation, tr⁄tp should be kept less than 2. 5 under the appropriate quality control of materials and welding procedures.
収録刊行物
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- 圧力技術
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圧力技術 41 (1), 17-27, 2003
一般社団法人 日本高圧力技術協会
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キーワード
詳細情報 詳細情報について
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- CRID
- 1390001204617281664
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- NII論文ID
- 80015773535
- 130004446696
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- NII書誌ID
- AN00011762
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- ISSN
- 13479598
- 03870154
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- NDL書誌ID
- 6456845
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDL
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可