武岳,李建平,张延京,杨忠,陶栋,杨通

• 1:西安工业大学材料与化工学院

摘要(Abstract)：

对Ru T300蠕墨铸铁合金进行了900℃、950℃、1000℃正火处理,并对1000℃加热处理的试样进行不同冷却处理(炉冷,空冷,风冷和喷水雾冷)。与铸态合金相比,热处理后的Ru T300蠕墨铸铁合金中珠光体含量随奥氏体化加热温度提高而增高。并且随着奥氏体化后冷却速度的增大,珠光体含量逐渐增高,最高可达77.6%,较铸态组织增加了50%,珠光体层片间距逐渐减小,最小间距约为0.2μm,较铸态珠光体减小了0.4μm,抗拉强度和布氏硬度分别提高了25%和73%,但导热性能下降20%~30%。热处理后蠕虫状石墨数量和尺寸有所减小(1000℃),石墨与基体结合部位会出现开裂、脱粘现象,导致传热受阻,导热率下降。

关键词(KeyWords)： RuT300蠕墨铸铁;正火;力学性能;导热性能

Abstract:

Keywords:

基金项目(Foundation): 国家“973”项目(2012CB619606-2)

作者(Author): 武岳,李建平,张延京,杨忠,陶栋,杨通

DOI: 10.13289/j.issn.1009-6264.2017.02.023

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