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贫液管是富液加热器和贫液冷却器之间相联接的管于,由直径159mm,壁厚10mm和8mm的两节20~#钢管对焊而成.母材组织为铁素体加珠光体,珠光体有轻度球化.该管于1982年6月大检修时换上,83年下半年开始漏,至84年5月大检修时换下来,其间共补焊,抢修约40次.为查明破裂原因,我们先后进行了现场调查、宏观、微观分析及机械性能实验等工作.
The lean liquid tube is a tube connected between the rich liquid heater and the lean liquid cooler and is formed by butt welding two 20 to # steel tubes having a diameter of 159 mm, a wall thickness of 10 mm and a thickness of 8 mm, and the base material is ferrite plus Pearlite, pearlite mild spheroidization of the tube in June 1982 when the major overhaul, 83 in the second half began to leak, to major maintenance in May 84 replaced, during which a total of repair welding, repair about 40 In order to find out the reason of rupture, we carried out on-the-spot investigation, macroscopical, microscopic analysis and experiment of mechanical properties.