TC11合金大圆精锻棒材低倍暗斑分析及挽救措施

Macro-segregation analysis and rescue measure of TC11 alloy large round precision forged bar

通过光学显微镜、扫描电镜、能谱分析等试验手段对TC11合金大圆精锻棒材的低倍暗斑进行分析研究,确定了其低倍暗斑的形成主要是由于精锻工艺设计不合理造成的,属于锻造缺陷。通过β相区高温扩散、在α+β相区生产小圆轧棒,可以消除该类缺陷,不会造成材料判废。

Speckles in the TC11 alloy large round precision forged bar were analyzed and studied by means of optical microscope, scanning electron microscope and EDS analysis. It is determined that the formation of low magnification speckles is mainly caused by the unreasonable setting of precision forging process, which belongs to a forging defect. The defect can be eliminated by high temperature diffusion at β phase zone and rolling into small round bars at α+β phase zone, which will avoid scrapping the material with such a defect.