書誌事項
- タイトル別名
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- Improvement in Microstructure and Toughness of Large Heat-Input Weld Bond Due to Addition of Rare Earth Metals and Boron in High Strength Steel
- キドルイ ゲンソ ト B テンカ ニヨル コウチョウリョク コウ ノ ダイニュ
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For the purpose to improve the weld bond toughness through ferrite grain refinement in 40-60kg/mmmm2 tensile strength steels, the effects of various alloying elements on the grain structure and notch toughness in the weld bond were investigated. Of the alloying elements investigated, small additions of both rare earth metal (REM) and boron (B) were found to accelerate the formation of fine ferrite grains inside prior austenite grains, resulting in a remarkable improvement weld bond thoughnss.<BR>The main results obtained are summarized as follows:<BR>(1) The optimum concentration range of REM and B are 0.020-0.040% and 0.0020-0.0035%, respectively.<BR>(2) With an increase of BN content, the number of fine ferrite grains increases remarkably.<BR>(3) The amount of BN re-precipitated during welding thermal cycle is larger in REM-B steel than in B steel.<BR>(4) Spherical inclusions are frequently observed in the center of ferrite grains or adjacent to them and many of them identified as Ce2O2S and BN.<BR>(5) According to the observation by IMMA, the location of B+-images is in good accordance with that of both Ce+-and N+-images.<BR>By the use of commercial heats of REM-B steel, brittle fracture tests were conducted and good results were obtained.
収録刊行物
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- 鉄と鋼
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鉄と鋼 63 (2), 303-312, 1977
一般社団法人 日本鉄鋼協会
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詳細情報 詳細情報について
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- CRID
- 1390282680130384000
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- NII論文ID
- 110001870229
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- NII書誌ID
- AN00151251
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- ISSN
- 18832954
- 00211575
- http://id.crossref.org/issn/00211575
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- NDL書誌ID
- 1810644
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- データソース種別
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可
