熔接用諸鋼材の連続冷却変態図(第1報)

• 関口 春次郎

  名古屋大学工学部

• 稲垣 道夫

  名古屋大学工学部

書誌事項

タイトル別名

• Continous Cooling Transformation Diagrams of Various Steels Submitted to Welding (Report 1)
• On 46 and 49kg/mm<SUP>2</SUP> mild steels
• 46および49kg/mm<SUP>2</SUP>軟鋼材について

抄録

In this report, the continuous cooling transformation diagrams in case of maximum heating temperature 1350°C, being convenient to estimate the strurture and hardness of the heat-affected zone near the fusion line by welding, were constructed for two kinds of steels of which ultimate tensile strengths are 46 and 49kg/mm². The continuous heating austenitization diagrams of those steels were also constructed. And, the following results were obtained;<BR>1. For the steel having ultimate tensile strenght of 46kg/mm², of which A₃-transformation-point is 829°C and A₁- point 720°C, critical cooling times, from A₃-point to 500°C, are determined as follows ;<BR>C_z'=1.25sec, C_f'=2.3sec, C_p'=9.0sec & C_e'=275sec, and the cooling time corresponding to 50% martensite is 3.8sec.<BR>2. For the steel having ultimate tensile strength of 49kg./mm², of which A₃-point is 824°C and A₁-point 702°C, critical cooling times are determined as follows ;<BR>C_z'=1.35sec, C_f'=3.2sec, C_p'=19sec & C_e'=280sec, and the cooling time corresponding to 50% martensite is 7.5sec.<BR>That is, concerning to the examples in this report, the values of critical cooling times of the steel having higher ultimate tensile strength are larger than those of the one having lower ultimate tensile strength.

収録刊行物

• 溶接学会誌

  溶接学会誌 27 (6), 340-346, 1958

  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: 1390282681478303488
• NII論文ID: 130003762743
• DOI: 10.2207/qjjws1943.27.340
• ISSN: 18837204
• 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