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首页> 外文期刊>Metals and Materials International >Brittle Crack Arrestability of Thick Steel Plate Welds in Large Structure
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Brittle Crack Arrestability of Thick Steel Plate Welds in Large Structure

机译：大型结构厚钢板焊缝的脆性裂纹消除

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Recently, there has been such a critical issue in shipbuilding industry that much larger and stronger ships are required to develop oil and gas in the Arctic region. Attention has been paid to obtaining high strength, good toughness at low temperature, and good weldability. An experimental study was performed to evaluate the brittle crack arrest toughness value (Ka) and brittle crack arrest method of welded joints using EH40 grade steel with a thickness of 80 mm. The test specimens were made by both flux cored arc welding (FCAW) and combined welding (EGW+FCAW) processes. Temperature gradient ESSO test was perfonned to measure the Kca of the base metal. Also, a constant temperature (-10 °C) ESSO test was performed to establish a brittle crack arrest method using high toughness welding consumable with real structural specimens. The research aims in this study were to investigate the effect of joint design and welding consumable for the crack arrestability of thick steel plates using EH40 grade shipbuilding steel of straight block joint weld line with two kinds of welding processes.
机译：近来，造船业中存在一个至关重要的问题，需要更大更强的船舶在北极地区开发石油和天然气。已经注意获得高强度，在低温下良好的韧性以及良好的可焊接性。进行了实验研究，以评估使用厚度为80 mm的EH40级钢的焊接接头的脆性裂纹止裂韧性值（Ka）和脆性裂纹止裂方法。通过药芯焊丝电弧焊（FCAW）和组合焊接（EGW + FCAW）两种方法制得了试样。进行温度梯度ESSO测试以测量贱金属的Kca。此外，还进行了恒温（-10°C）ESSO测试，以建立可用于实际结构试样的高韧性焊接来建立脆性裂纹止裂方法。本研究的目的是通过两种焊接工艺，研究采用EH40级直缝焊接线的厚钢板的接头设计和焊接材料对厚钢板的抗裂性能的影响。

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