朱阳存,刘光明,董猛,张民强,杨华春,汪元奎

• 1:南昌航空大学材料科学与工程学院
• 2:东方锅炉股份有限公司材料研究所

摘要(Abstract)：

研究了T91钢在渗铝温度区间650～750℃,活化剂添加量2%,渗铝时间2～8 h时的渗铝层形成与生长过程。结果表明:渗铝温度为650℃和700℃时,渗层为单一的Fe Al相;当渗铝温度为750℃,渗层为Fe Al与少量的Fe Al2相;渗层在渗铝温度高于700℃时,渗铝层内部出现空洞与裂纹等缺陷,裂纹的产生可能与渗层Al浓度有关。保温时间只对渗铝层厚度产生影响,不会改变渗铝层成分;渗铝层厚度会随着渗剂中的Al含量不同而发生变化。在渗铝温度650℃,保温8 h,活化剂含量2%时,得到厚度约为11. 5μm、致密的Fe Al渗层。在650～750℃温度区间渗铝温度(T)、渗铝时间(t)、渗剂Al含量(W)与渗层厚度(h)的关系可由方程式h=77. 44W1/2t1/2exp-3178. 92()T来描述。

关键词(KeyWords)： T91钢;低温;包埋渗铝; FeAl相

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 朱阳存,刘光明,董猛,张民强,杨华春,汪元奎

DOI: 10.13289/j.issn.1009-6264.2018-0254

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