鋼溶接部の結晶粒微細化におよぼすＴｉおよびＮｂの影響について

• 迎 静雄

  九州工業大学

• 加藤 光昭

  九州工業大学

• 西尾 一政

  九州工業大学

書誌事項

タイトル別名

• Grain Refining Effect of Ti and Nb in Carbon Steel Welds

抄録

The suppression effects of the fine precipitate dispersions of micro-alloy elements, such as Ti and Nb, to the grain growth in carbon steel weld zone have been investigated using both methods of the isothermal heating experiment and the metallographic observations of TIG welds. The results obtained are as follows.<BR>1) Austenite grain diameter, D_x(T, t), in steel, which contains X% of micro-alloy element, isothermally heated at T°C for t sec is expressed by following equation<BR>D_x(T, t)=D_x=0(T, t)exp(-mX)<BR>where D_x=0(T, t) is austenite grain diameter of steel without micro-element. Designating exp(-mX) by P, parameter P would express quantitatively suppression effect of microalloy elements to austenite grain growth. Additions of Zr and Ti make P value considerably small comparing with Nb addition.<BR>2) Time exponent, n, in isothermal grain growth, D=ktⁿ, becomes remarkably small value as increasing Ti and Zr contents; at Ti 0.08 % and Zr 0.05 %, n value would be less than 0.1 and comes to show very weak temperature dependence. Also, addition of small amount of Ti or Zr considerably increases the activation energy for austenite grain growth.<BR>3) Both sizes of celluler substructure and maximum grain in HAZ rapidly decrease as adding of Ti or Zr; linear relationship exists between both sizes.

収録刊行物

• 溶接学会誌

  溶接学会誌 48 (5), 266-271, 1979

  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: 1390282681478698368
• NII論文ID: 130003763494
• DOI: 10.2207/qjjws1943.48.266
• 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