Carbon Equivalent and Maximum Hardness

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概要

• 論文の詳細を見る

• The accuracy of formulae for estimating the maximum hardness values of the HAZ from chemical composition and cooling time for welds in high strength steel is discussed and a new formula. NSC-S, is proposed which uses only C%, Pcm% and cooling time for the purpose of satisfactory accuracy. IIW CE and Ito-Bessyo Pcm carbon equivalent alone are not satisfactory in establishing Hmax values. The former is good only for slow cooling, t8/5 longer than 10 seconds, while the latter is good only for fast cooling, t8/5 shorter than 8 seconds. The NSC- Y (Yurioka) formula has proved to be superior to the other formulae for estimating Hmax from chemical composition and cooling time. The new formula, NSC-S, proposed by the author, is a simplified version of Yurioka's NSC- Y formula and has an accuracy equivalent to the Yurioka formula. The experimental relationship between Hmax and Pcm, heretofore thought to be very complicated, is clearly analyzed by the new NSC-S formula. Typical examples of its application are given.

• 社団法人溶接学会の論文
• 1984-04-01

著者

• Suzuki Haruyoshi

  Head Office Nippon Steel Corporation

関連論文

• Prevention Against Cold Cracking by the Hydrogen Accumulation Cracking Parameter P_
• Root Cracking and Maximum Hardness in High-Strength Steel Welds
• Carbon Equivalent and Maximum Hardness

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