Effect of solidification velocity on weld solidification process of alloy tool steel

Authors: Hashimoto, T.; Terasaki, H.; Komizo, Y.

Source: Science and Technology of Welding & Joining, Volume 13, Number 4, May 2008 , pp. 409-414(6)

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Abstract:

In order to clarify the effect of solidification velocity on the weld solidification process of alloy tool steel during the welding, the information about microstructure evolution was obtained by the concurrent experiments of liquid tin quenching and time resolved X-ray diffraction technique using intense synchrotron radiation. It was found from the experiments that the solidification mode was transferred from an FA to an A mode at the high solidification velocity. The effect of solidification velocity on the phase selection during solidification between the primary δ-ferrite and γ-austenite was theoretically proved by the Kurz, Giovanola and Trivedi (KGT) model. It is thus explained that the solidification cracking susceptibility of the weld metal of alloy tool steel was enhanced due to the δ to γ transition of the primary phase.

Keywords: TRXRD; WELDING; KGT MODEL; SOLIDIFICATION; LIQUID TIN QUENCHING; ALLOY TOOL STEEL

Document Type: Research Article

DOI: http://dx.doi.org/10.1179/174329308X300145

Publication date: 2008-05-01

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