通过硬度测试、韧性试验和显微组织比较,在不同的工艺条件下,对比研究了两步法和传统的单步法等温淬火工艺条件下得到的等温淬火球铁(ADI)的组织和性能.结果表明,采用"低温285℃保温形核+高温340℃或370℃等温淬火"的两步法等温淬火工艺与传统的340℃或370℃单步法等温淬火工艺相比,两步法得到的ADI比传统的单步法得到的ADI试样微观组织更细化、硬度显著提高、韧性也有了明显的改善.
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