沉淀硬化不锈钢机械能助渗铝的试验研究

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Study on Mechanical Energy Aided Aluminizing of Precipitation Hardening Stainless Steel

1. Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, Yunnan, China;
2. Avic Natnal South Industry Co. Ltd., Zhuzhou 412002, Hunan, China;
3. Central Iron & Steel Research Institute, Beijing 100081, China;
4. Jiangsu Chia-tai Tianqing Pharmacy Co. Ltd., Lianyungang 222006, Jiangsu, China

摘要: 通过机械能助渗铝工艺,实现对沉淀硬化不锈钢的低温渗铝。500℃渗铝10 h,可以在保证基体材料的力学性能基本无损耗的情况下,得到厚度约为11μm的均一渗铝层。采用SEM、EDS、显微硬度分析以及盐雾试验等测试手段对渗铝层进行研究,发现通过机械能助渗铝得到的为富铝相渗层,渗层硬度是基体材料的两倍以上,且具有良好的耐腐蚀及抗中温氧化性能。从渗铝反应机理的角度对机械能助渗铝工艺进行了分析。
- 沉淀硬化不锈钢 /
- 机械渗铝 /
- 渗铝层 /
- 力学性能
Abstract: Precipitation hardening stainless steel has been aluminized in the low temperature by the process of mechanical energy aided aluminizing.This technique produce layers with thickness of 11μm and appear to be homogeneous for 10 h treatment at 500℃,base on keeping the mechanical properties of matrix material unchanged.The aluminized layer is researched by using SEM、EDS、micro-hardness analysis and salt spray.The layers appear to be aluminum-rich phase,and have excellent resistance to corrosion and middle temperature oxidation,also,the micro-hardness of aluminized layer is more than two times than that of matrix material.The process of mechanical energy aided aluminizing is deep discussed from aluminizing reaction mechanism.
- precipitation hardening stainless steel /
- mechanical energy aided aluminizing /
- aluminized layer /
- mechanical properties

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