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多火次热模锻造GH4133A合金晶粒度与组织变化
英文标题:Grain size and microstructure change of GH4133A during multiple heating hot-die forging
作者:岳太文 姚泽坤 吴泽 宁永权 郭鸿镇 郭艳丽  
单位:西北工业大学材料学院 西北工业大学材料学院 西北工业大学材料学院 西北工业大学材料学院 西北工业大学材料学院 西北工业大学材料学院 陕西西安710072 陕西西安710072 陕西西安710072 陕西西安710072 陕西西安710072 陕西西安710072 
关键词:GH4133A合金  热模锻造  多火次  晶粒度 
分类号:TG316.3
出版年,卷(期):页码:2008,33(2):15-18
摘要:
通过热模锻造技术对GH4133A合金分别进行10%和30%的三火镦粗试验,探索了晶粒度随变形火次的变化规律、变形量对变形机制的影响。结果表明:当以10%变形量锻造时,无论是在1080℃还是在1160℃锻造,晶粒都是随火次增大逐步细化的。而以30%变形量锻造时,二火即累计变形60%时晶粒细化效果最显著,三火时晶粒细化效果不及二火。1160℃时细化效果不及1080℃。GH4133A合金在热模低速条件下是以滑移→孪晶→滑移方式或孪晶→滑移→孪晶→滑移方式进行变形的,且变形温度接近锻造温度区间下部时,多火次小变形同样能细化晶粒。
Deformation of 10% and 30% three-heating upset was carried out on GH4133A superalloy by hot-die forging,and the rule that grain size changed with heating numbers and the influence of deformation on its mechanism were studied.The results show that when hot-die forging is carried out with 10% deformation,either at 1080 ℃ or 1160 ℃,the grain size is decreased gradually as heating numbers increasing.And when the deformation is 30%,the grain size gets thinnest up to 60% deformation at the second heating,but it increases at the third heating.The effect of refining grains at 1160 ℃ is not obvious compared with 1080 ℃.GH4133A's deformation track is slipping→twin→slipping or twin→slipping→twin→slipping during low speed hot-die forging,and grain refinement is also obtained by multiple heating saddening when deformation temperature is close to the low limit of forging temperature.
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参考文献:
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