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用光学显微镜和扫描电镜对球铁中一种要重缺陷——黑斑进行了系统地逐层观察、研究和分析。结果表明,国内、外广为流行的关于其形成机理的“球墨破碎”论难于成立,并提出了新的黑斑形成机理。
Using optical microscopy and scanning electron microscopy of a heavy defect in ductile iron - dark spots were systematically layer by layer observation, research and analysis. The results show that it is hard to establish the popular theory about the formation mechanism of “nodular crushing” at home and abroad, and put forward a new mechanism of formation of dark spots.