摘要
通过金相显微组织分析及力学性能测试,研究了退火温度(900、950、1 000℃)及退火时间(5、7、9、11 min)对Fe-36Ni因瓦合金热轧板组织及性能的影响,并通过扫描电镜对断口形貌进行了观察。结果表明,随着退火温度的升高和保温时间的延长,奥氏体晶粒逐渐长大,并伴有少量的退火孪晶,材料的塑韧性提高,拉伸时发生典型的韧性断裂。经900℃退火后,其综合力学性能优于其它温度下处理的合金,且合金的晶粒分布比较均匀,并在保温时间为7 min时,具有最佳的综合力学性能。结合现场生产技术要求,退火温度为900℃、保温时间为7 min的热处理工艺最适合Fe-36Ni因瓦合金热轧板的后续轧制生产过程。
The effects of annealing temperature（900,950,1 000 ℃） and annealing time（5,7,9,11 min） on the microstructure and mechanical properties of hot-rolled plate of Fe-36Ni invar alloy were studied by optical microstructure analysis and mechanical properties testing,and the fracture morphology was observed by SEM.The results showed that with the increasing of the soaking time and the annealing temperature,the austenite grains grew up gradually accompanied by a small amount of annealing twin crystals.Meanwhile,its plasticity and toughness were improved,and the fracture section was typical ductile under the condition of tensile failure.After annealed at 900 ℃,the invar alloy obtained better comprehensive properties than that treated at the other annealing temperatures,and the grains size was more uniform.When annealing for 7 min,the invar alloy got the best comprehensive properties.According to the technical requirement of field production,the heat treatment process of 7 min soaking time and 900 ℃ annealing temperature was appropriate to the rolling process of hot-rolled plate of Fe-36Ni invar alloy.
出处
《上海金属》
CAS
北大核心
2012年第2期14-18,共5页
Shanghai Metals
基金
国家自然基金资助项目(50804028)
关键词
热轧因瓦合金
热处理
显微组织
断口形貌
力学性能
Hot-Rolled Invar alloy
Heat Treatment
Microstructure
Fracture Morphology
Mechanical Property
