摘要
对经200℃,400 ℃,600℃和800℃热处理后的Q235钢材在自然冷却和浸水冷却两种冷却条件下的力学性能展开试验研究。描述了高温后钢材的表面特征,定性地探讨了受热温度、冷却方式对高温后钢材力学性能的影响,包括屈服强度、极限强度、弹性模量、伸长率和颈缩率,最后用最小二乘法建立了不同冷却条件下高温后钢材屈服强度和极限强度与热处理温度之间的数学模型,并将试验结果和模拟结果进行了比较。试验表明,高温后,钢材在自然冷却条件下,其力学性能基本不变;而在浸水冷却条件下,其力学性能的变化与热处理温度密切相关,尤其是热处理温度达到600℃以后,各项力学性能变化明显。
The mechanical properties of Q235 steel after high temperature treatment were discussed. The hot treating temperature is 200 ℃, 400 ℃, 600 ℃, and 800 ℃, respectively. The experimental specimens were cooled in two different cooling modes, which are natural cooling mode and swamp cooling mode. After cooled, the surface characteristics of the specimens including color changes and carbonized situation were described in the field. The two influence factors of the mechanical properties of Q235 steel including hot...
出处
《结构工程师》
2009年第5期104-109,共6页
Structural Engineers
基金
同济大学第二期大学生创新实践训练计划(SITP)
关键词
高温
Q235钢材
冷却方式
力学性能
最小二乘法
数学模型
high temperature
Q235 steel
cooling mode
mechanical property
least square method
mathematical model
