摘要
采用显微分析、扫描电镜分析及能谱分析研究了含灰斑高频电阻焊X60钢管热处理前后的组织及焊缝冲击性能。结果表明:经920℃加热保温30 min空冷后,灰斑中大块夹杂物分化或分解逐渐脱溶析出,弥散分布于基体中,灰斑和带状组织得以减轻;同时冲击断口形貌由解理转为韧窝形貌,焊缝冲击性能明显提高。
Microstructure and impact property of X60 high frequency resistance welded pipe with gray spot before and after heat treatment were observed and analyzed by microscopic analysis, scanning electron microscopy and energy dispersive spectrum analysis. The results show that after heating at 920℃ for 30 min and then cooling in air, large size inclusions in the gray spot differentiate or decompose gradually, and disperse in the matrix, which makes gray spot and banded structure reduce. Meanwhile, the impact fracture morphology is changed from cleavage to dimples, and the impact property of weld seam improve greatly.
出处
《金属热处理》
CAS
CSCD
北大核心
2016年第9期122-127,共6页
Heat Treatment of Metals
