锻压技术

N08120耐蚀高温合金的高温变形行为及本构方程

英文标题：High temperature deformation behavior and constitutive model of anti-corrosion superalloy N08120

分类号：O347.3

出版年,卷(期):页码：2024,49(8):263-268

摘要：

针对N08120耐蚀高温合金在锻造和轧制过程中易出现粗晶、开裂和探伤无底波等问题，采用Gleeble-1500D热模拟实验机研究了N08120耐蚀高温合金在温度为850~1250 ℃、应变速率为0.01~1 s-1下的高温变形行为。基于Hansel-Spittle本构模型标定了其本构方程参数，为N08120耐蚀高温合金在锻造和轧制过程的数值模拟奠定了基础。结合微观组织演变过程，分析了应力软化的原因，发现降低温度和提升应变速率有助于细化晶粒。通过对板材轧制过程进行模拟计算所得的轧制力与实际生产数据进行对比，验证了Hansel-Spittle本构模型及本构方程参数的有效性。

Aiming at the problems of coarse grain, cracking and flaw detection without bottom wave in the forging and rolling process of corrosion resistant superalloy N08120, the high temperature deformation behavior of corrosion resistant superalloy N08120 at the temperature of 850-1250 ℃ and the strain rate of 0.01-1 s-1 was studied by Gleeble-1500D thermal simulation testing machine. Based on the Hansel-Spittle constitutive model,the parameters of constitutire equation were calibrated, which laid a foundation for the numerical simulation of the forging and rolling process of corrosion-resistant superalloy N08810. Combined with the microstructure evolution process, the causes of stress softening were analyzed, and it was found that reducing the temperature and increasing the strain rate helped to refine the grain. The rolling force calculated by simulating the rolling process of sheet was compared with the actual production data, the validity of the Hansel-Spittle constitutive model and parameters of consitutive equation was verified.

基金项目：

甘肃省教育厅青年博士支持项目(2024QB-030)；甘肃省联合科研基金重大项目(23JRRA1561)；甘肃省联合科研基金重点项目(23JRRA1562)；甘肃省2024年度技术创新引导计划-科技专员专项；兰州理工大学“红柳杰出青年人才支持计划”

作者简介：王旭明（1991-），男，学士，副高级工程师 E-mail：wxm0720@163.com 通信作者：牛立群（1984-），男，博士，讲师 E-mail：niuliqun111@126.com

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