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对两种不同类型的桥梁钢Q370q E进行不同温度的模拟火工试验,研究了火工温度对试验钢组织性能的影响。结果表明:随火工温度升高,Q370q E钢强度降低,冲击吸收能量变化较小。铁素体+珠光体型Q370q E钢的安全火工温度上限为800℃,而低碳贝氏体型Q370q E钢的安全火工温度上限为850℃。高于上限温度,试验钢性能无法满足要求。
Two different types of bridge steel Q370q E were simulated at different temperatures, and the effect of temperature on the microstructure and properties of the test steel was studied. The results show that the strength of Q370q E steel decreases with the increase of fire temperature, and the impact absorption energy changes little. The ferrite + pearlite Q370q E steel has a maximum safe fire temperature of 800 ° C, while the low carbon bainitic Q370q E steel has a maximum safe fire temperature of 850 ° C. Above the maximum temperature, the test steel performance can not meet the requirements.