王海波,石树坤,孙青竹

• 1:攀枝花学院材料工程学院
• 2:莱芜钢铁集团有限公司

摘要(Abstract)：

借助扫描电镜、透射电镜和示波冲击试验机研究了2205双相不锈钢经1040℃固溶处理40 min,500℃下不同时效时间(1~8个月)对其显微组织和韧性的影响。结果表明,经过固溶处理后的不锈钢只有铁素体和奥氏体组成,在500℃进行时效时,显微组织和韧性发生了显著变化。当时效到2个月左右的时候,铁素体相发生了调幅分解,分别产成了富铁铁素体相(α)和富铬铁素体相(α'),并发现大量的位错结构;5个月时,在铁素体和奥氏体相的的两相晶界出有析出相R相生成并长大,并且析出相的数量达到最大;当时效时间达到8个月时,沉淀析出相变的粗大,数量不再增加,并发现R相聚集成团。随着时效时间的延长,冲击能和韧性大大下降。铁素体的调幅分解和析出相的生成是导致其韧性下降的主要原因。

关键词(KeyWords)： 2205不锈钢;等温时效;显微组织;调幅分解;R相

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 王海波,石树坤,孙青竹

DOI: 10.13289/j.issn.1009-6264.2014.01.026

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