冯莹莹,单杰,廖宏义,耿硕,王明坤

• 1:东北大学数字钢铁全国重点实验室
• 2:湖南华菱湘潭钢铁有限公司

摘要(Abstract)：

钛/钢复合板具有良好的耐蚀性和较低的成本，但其较差的综合力学性能限制了其应用范围的拓展，如何提升其综合性能成为研究热点。研究了不同退火温度对预制波纹轧制的钛/钢复合板界面不同位置的微观组织和力学性能的影响。结果表明：随着退火温度的升高，界面处Fe和Ti元素跨界面的扩散距离不断增加，C元素向界面集中，这一现象促进了TiC颗粒的形核与长大，同时，(α-Ti+β-Ti)层的厚度不断增加，值得注意的是，波峰处的元素扩散行为和组织转变特征与其他位置存在显著差异；随着退火温度的升高，钢侧基材位错密度显著降低和再结晶晶粒显著增多，钢侧和钛侧小角度晶界减少，大角度晶界增多；退火温度的升高促使钢侧基材内马氏体数量锐减，因此复合板延展性提升，抗拉强度降低；当在750℃退火时，生成的脆性金属间化合物严重削弱了界面结合强度；在550℃退火时，复合板的综合力学性能最佳，抗拉强度为625 MPa,总伸长率为25.2%,剪切强度为291 MPa。

关键词(KeyWords)： 钛/钢复合板;预制波纹轧制;退火温度;元素扩散;金属间化合物

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(52105322)

作者(Author): 冯莹莹,单杰,廖宏义,耿硕,王明坤

DOI: 10.13289/j.issn.1009-6264.2024-0594

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