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首页> 外文会议>International conference on HSLA steels >EFFECTS OF DIFFERENT WELDING HEAT INPUT ON IMPACT TOUGHNESS OF SIMULATED WELD COARSE GRAIN ZONE FOR STEEL DG50
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EFFECTS OF DIFFERENT WELDING HEAT INPUT ON IMPACT TOUGHNESS OF SIMULATED WELD COARSE GRAIN ZONE FOR STEEL DG50

机译：不同焊接热输入对钢DG50模拟焊缝粗晶区冲击韧性的影响

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The effects of the welding heat input on the impact toughness of simulated weld coarse-grained zone (SWCGZ) for the DG 50 low temperature vessel steel have been investigated. The study was carried out on GLEEBLE-1500 THERMO-MECHANICAL TEST MACHINE. This paper discusses the relation between the heat input and the formation, morphology and quantities of martensite-austenite constituent (M-A) in SWCGZ. It has been shown that the M-A constituent played an important sole in the deterioration of toughness. In using of larger heat input (Δ t_(8/5) > 20s), the M-A formed considerablly in SWCGZ and the matrix was coarsened rapidly. In tenns of steel DG50, it was confirmed that an appropriate heat input would be of advantage to the toughness in weld coarse grain zone.
机译：研究了焊接热输入对DG 50低温容器钢模拟焊接粗粒区（SWCGZ）的冲击韧性的影响。该研究在GLEEBLE-1500热机械试验机上进行。本文讨论了SWCGZ中的热量输入与Martensite-奥氏体成分（M-A）的形成，形态和数量之间的关系。已经表明，M-A组成部分在韧性的恶化中起着重要鞋底。在使用较大的热输入（ΔT_（8/5）> 20s）中，在SWCGZ中呈现的M-A和基质迅速迅速稀释。在钢DG50的Tenns中，证实了适当的热输入对焊接粗粒区的韧性有利。

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