Study on the Grain Growth in Weld-Heat Affected Zone (Report 8)
Application of grain growth equation to the selection of welding conditions
1977 Volume 46 Issue 10 Pages 713-720
Details
1977 Volume 46 Issue 10 Pages 713-720
In this report, it was confirmed that the results obtained in previous report could be applied to the selection of welding conditions in order to improve the toughness in weld-heat affected zone (HAZ) of hieh tensile steels.
Main results obtained are as follows.
(1) Toughness of high tensile steels with various microstructures can be improved by refinement of prior austenite grain.
(2) Austenite grain size in HAZ of electron beam welding can be calculated using Eq. (1) derived in previous report.
(3) In electron beam welding of 100 kg/mm2 grade high tensile steel, it was calrified that toughness' in HAZ could be improved considerably if heat input per penetration depth was controlled under 2.6 KJ/cm2, using Eq. (1).
