摘要
采用焊接热模拟技术对屈服强度为850 MPa管线用平板进行了热影响区的模拟试验,研究该钢在不同峰值温度和冷却时间下的组织与性能,测定了其热影响区的显微硬度。结果表明,钢板基体组织为下贝氏体,经历不同的热循环后,热影响区组织有不同程度的变化;在所选择的工艺参数范围内,热影响区的显微硬度没有降低;在(α+γ)两相区受热后的冲击吸收能量降低了31 J,是整个热影响区的脆性区域。
The thermal simulation experiments were performed by using a pipeline steel plate with yield strength 850 MPa.Effects of the various peak temperatures and cooling time on microstructure and properties of the heat affected zone（HAZ） were studied.The results show that the microstructure of base material is lower bainite,which can evolve with different thermal cycles.The HAZ hardness does not decrease,but the impact energy in the（α＋γ） two-phase area of HAZ is reduced about 31 J,which is the brittle area of the whole heat affected zone.
出处
《金属热处理》
CAS
CSCD
北大核心
2011年第4期54-57,共4页
Heat Treatment of Metals
关键词
管线钢
焊接
热模拟
热影响区
显微组织
pipeline steel
weld
thermal simulation
heat affected zone（HAZ）
microstructure
