摘要
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。
Effect of line-heating temperature on microstructure and mechanical properties of two different types of Q370 q E bridge steels was investigated by means of heat treatment test. The results show that the strength of Q370 q E bridge steels decreases and the impact absorbed energy changes a little as the line-heating temperature increasing. For the steel with pearlitic and ferritic microstructure,the upper limit of line-heating temperature is 800 ℃,for the steel with a bainitic microstructure,the upper limit of line-heating temperature is 850 ℃.Exceeding the upper limit of line-heating temperature the strength can not meet the requirement for use.
出处
《金属热处理》
CAS
CSCD
北大核心
2017年第6期56-59,共4页
Heat Treatment of Metals
关键词
桥梁钢Q370q
E
火工温度
组织
性能
Q370qE bridge steel
line-heating temperatures
microstructure
mechanical properties
