摘要
通过OM、TEM、XRD和电子拉力试验机,研究等温淬火对H13钢的显微组织与弯曲性能的影响。结果表明:H13钢经淬火后可以获得合金主要由贝氏体、贝氏体/马氏体、少量的马氏体和残留奥氏体组成的混合组织。在淬火过程中,合金组织中优先析出(Cr,Fe)_(23)C_6和(Cr,Fe)_3C两种类型的碳化物,影响奥氏体的稳定性,转变为贝氏体、贝氏体/马氏体、少量的马氏体。随着淬火时间的延长,合金的弯曲强度和塑性均有所提高,抗弯强度在淬火时间为60min时达到本试验的最大值3286MPa。合金断口由沿晶断裂转变为穿晶解理断裂。
引文
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