摘要
新型内生弥散氮化物强化高温合金具有优异的高温力学性能,其现存在主要的一个问题是合金氮化后的室温塑性较差。对此,针对性地研究了新型氮化物强化合金NS163合金在氮化后的高温回复热处理工艺,旨在通过在1150~1280℃进行热处理调控氮化合金板材的氮化物形貌和分布来改善氮化后的室温塑性。结果表明:高温回复热处理可以消除板材氮化过程中近表面晶界和晶内析出的含铬氮化物,进而可以恢复合金板材的塑性。而晶内析出的细小颗粒状氮化物在高温热处理过程中可以保持良好热稳定性。最佳的高温回复热处理温度为1240℃。
The new internal nitride dispersion enhanced superalloy has excellent mechanical properties at high temperature.One of the main existing problems is that the alloys have poor plasticity at room temperature after nitriding.In order to improve the room temperature plasticity after nitriding,the high temperature recovery heat treatment process of NS163 alloy after nitriding was studied by heat treatment at 1150-1280℃to regulate the morphology and distribution of nitriding alloy plate.The results show that the high temperature recovery heat treatment can eliminate the Cr-containing nitrides precipitated near the surface grain boundary and in the crystal during the nitriding process,and then the plasticity of the alloy sheet can be restored.The fine granular nitrides precipitated in the crystal can maintain good thermal stability during high temperature heat treatment.The optimum temperature of recovery heat treatment is 1240℃.
作者
陈智莹
杨大伟
沈宇
鞠泉
CHEN Zhiying;YANG Dawei;SHEN Yu;JU Quan(AECC Hunan Power Machinery Research Institute,Zhuzhou 412002,Hunan,China;Superalloy Department,Central Iron and Steel Research Institute Co.,Ltd.,Beijing 100081,China;Gaona Aero Material Co.,Ltd.,Beijing 100081,China)
出处
《钢铁研究学报》
CAS
CSCD
北大核心
2024年第2期237-244,共8页
Journal of Iron and Steel Research
关键词
新型内生氮化物强化
高温合金
高温回复处理
热处理
力学性能
new internal nitride dispersion enhancement
superalloy
high temperature recovery treatment
heat treatment
mechanical property
