低合金強靱鋼の熔接の研究(第5報)

• 伊藤 慶典

  防衛庁技術研究本部

• 加茂 正美

  防衛庁技術研究本部

• 荒城 義郎

  三菱日本重工業KK東京自動車製作所

• 宮長 文吾

  三菱日本重工業KK東京自動車製作所

• 仁熊 賢次

  三菱日本重工業KK東京自動車製作所

書誌事項

タイトル別名

• Study on Welding of Low Alloy High Strength Steel (Report 5)
• Oxy-Acetylene Gas Cutting
• 酸素アセチレンガス切断について

抄録

In the study of oxy-acetylene gas cutting of low alloy high strength steel, the relation between crack sensitivity of heat affected zone and following subjects are researched applying bending tests.<BR>Gas cutting speed<BR>Pre-heating temperature<BR>Post-heating temperature<BR>Hardness of mother steel<BR>Condition of cutting surface<BR>Composition of steel<BR>etc.<BR>Experiments are made in this study, in order to know the metallergical nature of heat affected zone and its effect for weldability of mother steel. Following results are shown by these experiments.<BR>1. Increase of bending angle in bending test and decrease of maximum hardness at heat affected zone show that 100°C pre-heating gives remarkable effect to improve the crack sensitivity of steel.<BR>2. 200°C or over 400°C post-heating gives effect for the decreasing of crack sensitivity value, through 100°C pre-heating gives better effect.<BR>300°C post-heating which belongs to the range of temper brittleness should be avoidable.<BR>3. Less cutting speed gives better bending effect generally.<BR>4. Less hardness by high tempering temperature gives better bending effect to mother steel, just same as the effect of post-heating temperature. 300°C tempering gives less bending effect.<BR>5. Removing of cutting carf makes bending effect a little better, despite removing of heat affected zone gives remarkable effect.<BR>6. Value of bending test of rolled steel is far higher than cast steel.<BR>7. X-ray spectrochemical analysis and michro-structure proof the increase of Ni, Cu, Mo content and the decrease of C, Cr, Mn content on the gas cutting surface.<BR>8. It is suposed that the cementite zone and the high carboned zone inside made by carbon defusion out of mother steel.<BR>9. It became clear that the application of suitable gas cutting is quite effective for the welding edge of low alloy high strength steel.

収録刊行物

• 溶接学会誌

  溶接学会誌 28 (12), 881-889, 1959

  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: 1390001206501646208
• NII論文ID: 130003762766
• DOI: 10.2207/qjjws1943.28.881
• 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