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研制成功低合金铸铁光谱分析标准物质,发现“精炼铁水、提高铸铁自身形成白口化的能力”是研制高品质铸铁光谱分析标准物质的关键。除了关注标准物质的致密性、均匀性、白口化外,对铁水纯净度也应给予特殊的关注。通过采取特殊的铸造工艺,优化冶炼浇注技术,提高铁水纯净度,降低样品中夹杂物的数量,减少其粒度,从而减少铸铁中生成的石墨晶核数量,有效提高铸铁自身形成白口化的能力,最终保证了铸铁光谱分析标准物质的内在质量。
The successful development of low-alloy cast iron spectroscopy standard material, found that “refining the hot metal, improve the formation of white cast iron itself,” is the development of high-quality cast iron spectrometry standard material key. In addition to focusing on the tightness, uniformity and whiteness of standard materials, special attention should be given to the purity of hot metal. Through adopting special casting technology, optimizing smelting and pouring technology, improving the purity of molten iron, reducing the amount of inclusions in samples and reducing the grain size, thereby reducing the number of graphite nuclei generated in cast iron and effectively increasing the ability of cast iron to form white mouth , Ultimately ensuring the inherent quality of cast iron spectroscopy standard material.