３０８系溶接金属の硬さ・組織に及ぼす溶接熱サイクルの影響

• 財前 孝

  新日本製鉄(株)製品技術研究所

• 青木 司郎

  新日本製鉄(株)製品技術研究所

• 鈴木 克巳

  新日本製鉄(株)製品技術研究所

• 板東 誠志郎

  新日本製鉄(株)製品技術研究所

書誌事項

タイトル別名

• Effects of the Welding Heat Cycles on the Hardness and Microstructures of 308 Type Stainless Steel Weld Metal

抄録

Changes of the metallurgical and mechanical properties, in the root pass weld metals accompanied with the repeated welding heat cycles of the multi-layer submerged arc welding, are studied. The obtained results are as follows.<BR>1) The first and the second time welding heat cycle do not increase the hardness for the root pass weld-metal, and the hardnesses increase from Hv150 to Hv190 between the third and the sixth time welding heat cycle.<BR>2) Cooling rates down to 500°C for the first time and the second welding heat cycle are 24°C/s and 5.9°C/s, cooling rate decreases till 1.5°C/s for the sixth welding heat cycle.<BR>3) Precipitates are formed in the S ferrite along d ferrite-austenite boundaries, and the precipitates grow up to about 1000th in size.<BR>4) Fine precipitates, which diameter are hundreds A, are formed in the austenite matrix, and the disloca-tions in the austenite matrix are fixed by these fine precipitates.<BR>5) Dislocation densities in the austemte matrix are increased from 108/cm² to 2×109/cm² by the released strain accompanied with the six times repeated welding heat cycles.

収録刊行物

• 溶接学会誌

  溶接学会誌 52 (1), 37-45, 1983

  一般社団法人 溶接学会

キーワード

• Metals and Alloys
• Surfaces, Coatings and Films
• Mechanical Engineering
• Mechanics of Materials

詳細情報

• CRID: 1390001206497916416
• NII論文ID: 130003763667
• DOI: 10.2207/qjjws1943.52.37
• ISSN: 18837204
• ISSN: 00214787
• ISSN: http://id.crossref.org/issn/00214787
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可