蔺皓,王敬忠,王立民,赵立佳,王志刚,周杰

• 1:西安建筑科技大学冶金工程学院
• 2:钢铁研究总院有限公司特钢研究院
• 3:东北大学冶金学院
• 4:江苏申源集团有限公司

摘要(Abstract)：

随着内燃机技术的发展，排气阀需承受更高的温度、更高的废气压力以及硫化物引发的热腐蚀等恶劣工况，对气阀制造材料提出了更高的要求，传统气阀钢逐渐难以满足高端排气阀的性能需求。镍基及铁镍基合金因其优异的耐腐蚀性能、抗高温蠕变性能及抗高温氧化性能而受到广泛关注，但镍的高成本限制了镍基合金在气阀制造领域的大规模应用。铁镍基合金在力学性能上接近镍基合金，凭借其成本优势，有望成为气阀合金发展的主要方向。然而，目前针对铁镍基合金的增强机制及合金元素间的协同作用尚缺乏系统研究。为此，本文以气阀合金的合金化、微观组织及力学性能之间的关系为切入点，系统分析了镍（Ni）、铬（Cr）、碳（C）、钛/铝（Ti/Al）和铌（Nb）元素在气阀合金中的作用，阐述了热处理参数对合金的晶粒度、沉淀相（如γ', MC和M_(23)C_6等）尺寸、数量、形态与分布的影响，并在此基础上探讨了高端气阀合金开发中可能面临的关键问题及其应对措施。

关键词(KeyWords)： 气阀合金;热处理;微观组织;力学性能

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划项目（2021YFB3794202）;; 中信-CBMM R&D铌技术合作项目（D148/M）;; 中信合作项目（D197/M2124）资助

作者(Author): 蔺皓,王敬忠,王立民,赵立佳,王志刚,周杰

DOI: 10.13373/j.cnki.cjrm.XY24100016

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