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使用奥氏体不锈铜带焊在2(1/4)Cr一1M0钢大型钢板上的堆焊层,在长时间置于高温、高压氢气中后产生富氢现象。本文研究了由此导致的焊层剥裂。所得结果是: 1.当试样从加氢温度急冷至室温时,产生延迟裂纹; 2.这种裂纹产生在靠近熔合线焊层晶界处; 3.提高焊后热处理温度和延长保温时间,则裂纹敏感性上升; 4.焊后加热(释氢加热)或降低加氢后的冷却速度,则敏感性下降。一、绪言在高温处理高压氢气的压力容器,例如在
The use of austenitic stainless steel with 2 (1/4) Cr a 1M0 large steel plate welding layer, after prolonged exposure to high temperature, high pressure hydrogen gas to produce hydrogen-rich phenomenon. This article studies the resulting solder stripping. The results are: 1. When the sample quenched from the hydrogenation temperature to room temperature, resulting in delayed cracks; 2. This crack generated near the weld line grain boundaries; 3. Raise the post-weld heat treatment temperature and extend the holding time, The crack sensitivity increases; 4. The sensitivity decreases after the post-weld heating (hydrogen release heating) or the reduction of the cooling rate after hydrogenation. I. INTRODUCTION Pressure vessels that process high-pressure hydrogen at high temperatures, for example