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一、前言 锅炉炉管用钢是用量较大的一种压力容器材料。我困一般采用20号钢制造中、低压锅炉炉管。目前世界各国在设计高压锅炉吋,尽量降低蒸汽温度,使用优质碳素钢或低合金耐热钢制造炉管,以达到合理的造价与综合经济指标。 但是低碳钢和低合金耐热钢在高温下长期运行时。易产生珠光体球化及石量化现象。珠光体球化对钢材的室温机械性能特别是高温性能均有很大影响,大大降低了炉管的使
First, the foreword Boiler tube steel is a larger amount of pressure vessel material. My sleepy general use 20 steel, low pressure boiler tubes. At present, countries in the world in the design of high-pressure boiler, try to reduce the steam temperature, the use of high-quality carbon steel or low alloy heat-resistant steel furnace tube to achieve a reasonable cost and comprehensive economic indicators. However, low carbon steel and low alloy heat-resistant steel at high temperatures for long-term operation. Easy to produce pearlite and stone quantitative phenomenon. Pearlite ball on the room temperature mechanical properties of steel, especially high temperature performance has a great impact, greatly reducing the furnace tube so that