Fe元素對(duì)TC4鈦合金熔化溫度的影響

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Abstract：During the heat treatmentof thinwallsof TC4 titanium alloy foraviation，theprocess affected is prone tooxidationandintercrystalcorosion.Ifheated withother materials，itiseasytococrystalizewiththeFeelement in it，forming a low melting point eutectic reaction product that melts at low temperature.The purpose of this paper is to study the effectofFe element in different materialsonthe melting temperature of TC4 titaniumaloy.Select typical aviation materials with diferent Fe content of GH4169，O6Cr18Ni9 and TC4，and comparatively analyzed the tissue morphology and eutectic reaction product FeTi of the three groups of GH4169+TC4 ，06Cro18Ni9 + （20 TC4 and GH4169+06Cr18Ni9 after being heat treated at with a temperature of . The composition of the eutectic product FeTi produced by heat treatment wasanalyzed using a Bruker Sititan 3OO spectrometer and an Axio Observer Zeiss micrograph.Theresults showed that when the temperature rose to the FeTicocrystallization temperature point （the minimum cocrystallizing temperature was1085℃），The eutectic reaction between Fe and Ti in the low melting point eutectic region of TC4 titanium alloy occurs in diffrent samples to form the eutectic reaction compoundFeTi，the higher theFecontent，the more obvious thereaction.andas the temperature increased， the FeTi eutectic reactionorganizationmelted to forma liquid phase，thereby reducing the melting temperatureof the TC4 titanium alloy.This study can provide theoretical guidance for vacuum heat treatment ofTC4 titanium alloycomponentsused in aviation.

Keywords：Fe element； TC4 titaniumalloy；melting temperature；eutectic

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TC4鈦合金具有許多重要的特性，如比強(qiáng)度高、耐腐蝕、膨脹系數(shù)低、熱導(dǎo)率低、無磁性、生物相容性好和高阻尼等特殊功能，既是優(yōu)質(zhì)的輕型耐腐蝕的結(jié)構(gòu)材料，又是新型的功能材料以及重要的生物醫(yī)用材料[1]，廣泛應(yīng)用于兵器、艦艇及海洋工程、航空航天、建筑與生活用品等領(lǐng)域。（剩余4258字）