Qingan ZHANG and Jiasheng GAO (East China Institute of Metallurgy
,
Ma'anshan
,
243002
,
China)Nanju GU and Fuxing YIN (Hebei Institute of Technology Tianjin
,
300130
,
China)(East China Institute of Metallurgy
,
Ma'anshan
,
243002
,
China)
材料科学技术（英文）
With electron microscopic investigation, the configuration of dislocations in an aged Cu-25,72Zn4.21Al (wt-%) shape memory alloy was found to be in the form of superdislocations and their jogs, which were different from the preferential dislocations regularly aligned in an unaged alloy. These defects generated during aging treatment were considered to be responsible for low fatigue life
关键词:
Qingan ZHANG and Nanju GU (Hebei Institute of Technology Tianjin
,
300130
,
China)(East China Institute of Metallurgy
,
Ma'anshan
,
243002
,
China)
材料科学技术（英文）
The crossed micro-bands in the martensite variant pairs of a thermomechanically trained Cu25.66Zn-4.02Al (wt-%) alloy have been studied. It was found that the micro-bands pass through the interface from one martensite variant to another and their orientation inside different variants is distinct, which would remain in the parent phase after the reverse transformation and play an important role in the formation of preferential martensite. In fact, the crossed micro-bands are micro-twins for accommodating the stress fields generated during thermomechanically training
关键词:
王萍
,
黄贞益
,
尹桂全
,
赵学武
,
王光朋
钢铁研究学报
工业大学金属材料与加工重点实验室, 安徽 马鞍山 243002)
摘要：在带钢热轧后的冷却过程中，热轧带钢卷取温度的数学模型是至关重要的。介绍了某热轧带钢厂的卷取温度控制数学模型，针对传统的热轧带钢层流冷却卷曲温度控制中数学模型的固有缺陷，分别采用了差分方程和有限元数值模拟的方法，建立带钢厚度方向上的温度场。对测得的数据进行了分析，结果表明：在考虑带钢与介质的热交换的同时再考虑带钢内部的热传导大大提高模型的预报精度，为定量地描述计算值与实测值之间的偏差提供了依据。
关键词:
热轧带钢;层流冷却;有限差分;数值模拟
