简介:Theeffectsofprocessparametersonthemicrostructuralevolution,includinggrainsizeandvolumefractionoftheαphaseduringhotformingofaTC6alloywereinvestigatedusingcompressiontests.Experimentswereconductedonthematerialwith(α+β)phasesatdeformationtemperaturesof800,860,920,and950°C,strainratesof0.001,0.01,1,and50s-1,andheightdirectionreductionsof30%,40%,and50%.Afterreachingapeakvaluenear920°C,thegrainsizeandvolumefractiondecreasewithfurtherincreaseofdeformationtemperature.ThestrainrateaffectsthemorphologiesandgrainsizeofαphaseoftheTC6titaniumalloy.Atalowerstrainrate,theeffectofthestrainrateonthevolumefractionisgreaterthanthatatahigherstrainrateundertheexperimentalconditions.Theeffectsofthestrainrateonthemicrostructurealsoresultfromdeformationheating.Thegrainsizeoftheαphaseincreaseswithanincreaseinheightdirectionreductionafteranearlydrop.Theeffectofheightdirectionreductiononthevolumefractionissimilartothatofthegrainsize.AlloftheopticalmicrographsandquantitativemetallographyshowthatdeformationprocessparametersaffectthemicrostructureduringhotformingoftheTC6alloy,andacorrelationbetweenthetemperature,strain,andstrainrateappearstobeasignificantfuzzycharacteristic.
简介:摘要:基于钛合金高效加工技术的研究现状,以5米级TC21钛合金梁为研究对象,通过制定工艺方案,在粗、精加工过程中采用了大进给铣削、强力铣削等切削方式,完成了大型钛合金梁类零件的高效铣削加工,大幅提高了加工效率;同时极大丰富了钛合金切削的参数库,为同类型零件的加工及优化提供指导。
简介:摘要:钛及钛合金铸锭在实际生产中,一般需要根据其表面具体情况,选择机械处理、表面涂层等合适的表面处理方式,以达到最佳的使用效果。本文通过对TC1板材用钛合金铸锭表面状态与TC4钛合金铸锭表面状态的对比,开展TC1钛合金铸锭表面车削与不车削的不同加工方式状态下,研究其锻造坯料表面质量的区别,同时探索在两种不同状态下其锻造后的坯料经车削后其综合成品率的差异、以及生产成本的影响。