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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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均匀化过程中铸态gh742合金的组织转变
Keywords: 金属材料,镍基高温合金,均匀化,组织转变,偏析,扩散
Abstract:
？铸态gh742合金中存在复杂的第二相组织和严重的枝晶偏析,nb、ti大量富集于枝晶间和mc碳化物、laves相、δ相、(γ+γ′)等析出相中.本文确定了γ基体的熔化温度为1160℃,并通过不同的均匀化处理确定了γ′相、(γ+γ′)共晶、mc碳化物、laves相、δ相、ni5ce相及含氧硫稀土相等析出相的溶解温度.由于稀土相在1120℃发生熔化,提出一种gh742合金低温预处理加高温扩散的二次均匀化制度来扩大其均匀化温度区间,提高扩散退火温度,从而获得均一的组织.元素扩散计算结果表明,提高均匀化温度可以提高元素的扩散系数;nb的偏析系数比ti的小得多,达到完全均匀化需要很长的时间.
| [1] | 1l.zheng,c.q.gu,y.r.zheng,investigationofthesolidificationbehaviorofanewru-containingcastni-basesuperalloywithhighwcontent,scriptamaterialia,50,435(2004)
|
| [2] | 2j.n.dupont,c.v.robino,j.r.michael,m.r.notis,a.r.marder,solidificationofnb-bearingsuperalloys:parti.reactionsequences,metallurgicalandmaterialstransactionsa,29,2785(1998)
|
| [3] | 3w.r.sun,s.r.guo,d.z.lu,z.q.hu,effectofsulfuronthesolidificationandsegregationininconel718alloy,materialsletters,31,195(1997)
|
| [4] | 4s.l.semiatin,r.c.kramb,r.e.turner,f.zhang,m.m.antony,analysisofthehomogenizationofanickel-basesuperalloy,scriptamaterialia,51,491(2004)
|
| [5] | 5r.c.kramb,m.m.antony,s.l.semiatin,homogenizationofanickel-basesuperalloyingotmaterial,scriptamaterialia,54,1645(2006)
|
| [6] | 6xieyongjun,liangxuefeng,miuhongbo,liwei,microstructureandsegregationeliminationofsuperalloygh742ingot,journalofironandsteelresearch,15(7),17(2003)
|
| [7] | (谢永军,梁学锋,缪宏博,李伟,gh742合金钢锭的组织及偏析的消除,钢铁研究学报,15(7),17(2003))
|
| [8] | 7tianyuliang,wangling,dongjianxin,zhangmaicang,microsegregationofgh742ingotandtheelementdistributionduringhomogenizingtreatment,raremetalmaterialsandengineering,35(8),1315(2006)
|
| [9] | (田玉亮,王玲,董建新,张麦仓,gh742铸锭偏析及均匀化过程中元素分布规律,稀有金属材料与工程,35(8),1315(2006))
|
| [10] | 8sunzhenyan,liuchunming,diffusionandphasetransformationsinalloys(shenyang,northeasternuniversitypress,2002)p.39
|
| [11] | (孙振岩,刘春明,合金中的扩散与相变(沈阳,东北大学出版社,2002)p.39)
|
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