关键词: TC11合金, 大圆精锻棒材, β斑, 锻造缺陷, 挽救措施

Abstract: 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.

Key words: TC11 alloy, large round precision forged bar, β speckle, forging defect, rescue measure