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喷丸强化对TC11钛合金高周疲劳性能的影响!

发布时间:2015.04.02    点击数: 13648

        缘于TC11钛合金材料在航空领域的特殊用途,近年来对其研究愈加深入。由于飞机发动机运行时的高频振动会给附近构件一个挠动应力作用,使零件反复拉压,严重影响零件的疲劳性能。更有资料表明:航空构件中疲劳失效占80%以上,疲劳失效中80%以上裂纹起始于表面缺陷。研究发现钛合金表面状态对疲劳性能的影响很显著。这是因为钛合金的切削加工性很差,从而影响到钛合金构件的使用性能。喷丸强化比分波胆机制是喷丸后在一定程度上保证材料的表面完整性,减少表面缺陷和局部应力集中的影响,在构件表面形成残余压应力场,从而提升构件的疲劳性能。

  YANJIURENYUANTONGGUODUIBICESHICHEXUE+CUPAOCHULIYUCHEXUE+CUPAO+PENWANCHULIQIANHOULIANGZHONGBUTONGBIAOMIANZHUANGTAIXIATC11TAIHEJINGAOZHOUPILAOXINGNENGDECHAYI,TANJIUPENWANHOUTC11TAIHEJINZAIHONGWEIGUANPILAOYINGXIANGYINSUSHANGDEBIANHUA,WEIPENWANCHULIZAITC11TAIHEJINDEYINGYONGSHANGTIGONGSHUJUZHICHENGHELILUNYIJU。

比分波胆   TC11PILAOSHIYANGYOUMOUGONGSITIGONG,YUANSHIBANGCAIJING950℃SHUANGZHONGTUIHUO1hHOUZAI530℃QUYINGLITUIHUO。RECHULIWANHOU,SHIYANGJINGJIAGONGCHENGPILAOSHIYANG。JIANGWEIPENWAN、PENWANSHIYANGFENBIEMINGMINGWEI0#、1#SHIYANG,QIZHONG0#PILAOSHIYANGCAIQUCHEXUE+CUPAOGUANGCHULI;1#SHIYANGCAIQUCHEXUE+CUPAO+PENWANCHULI,QIPENWANCANSHU:PENWANYALI0.56MPa,LIULIANG7kg·min-1,JIAODU80°,JULI130mm,SHIJIAN50s。LIYONGMTSDIANYESIFUSHIYANJICEDEQILASHENSHUJU,PENWANQIANHOUTC11TAIHEJINKANGLAQIANGDUBIANHUABUDA,KANGLAQIANGDUσbWEI1154MPa。

   SHIYANGFENZUHOU,ZAIQBG-200GAOPINPILAOSHIYANJISHANG,YIYINGLIBIr=-1DELAYAJIAZAIFANGSHIZAISHIWENTIAOJIANXIAJINXINGGAOZHOUPILAOSHIYAN,FENBIEYI460、640 MPaZUOWEI0#、1#SHIYANGSHENGJIANGSHIYANDEQISHIYINGLIZHI,YIΔσ=20MPaZUOSHENGJIANGSHIYAN。SHOUXIANLIYONGSHENGJIANGFACEDING0#、1#ZHUANGTAI1×107ZHOUCIXIADEGAOZHOUPILAOQIANGDUJIXIAN,ZAIYONGCHENGZUSHIYANFACEDINGGAOYINGLIXIADEPILAOZHI,JIEHELIANGZUSHUZHINIHECHENGS-NQUXIAN。SHIYANJIEGUOBIAOMING:

  

       (1)PENWANHOUZAIBIAOCENGXINGCHENGMINGXIANDECANYUYAYINGLICHANGHEPENWANYINGHUAXIANXIANG,JIANGLIEWENMENGSHENGQUGANZHICIBIAOMIAN,XIANZHUTIGAOLETC11PILAOQIANGDUHESHOUMING。

       (2)JINGPENWANHOUTC11TAIHEJINSHIYANGPILAOQIANGDUJIXIANDADAO616.5MPa,ERWEIPENWANSHIYANGPILAOQIANGDUJIXIANJINWEI448MPa,YUZHIXIANGBIPENWANHOUPILAOQIANGDUJIXIANZENGJIALE168.5MPa,TISHENGFUDUDA37.6%。

       (3)PENWANBUJINSHIDESHIYANGBIAOMIANWANZHENGXINGGENGWEILIANGHAO,JIANSHAOLEBIAOMIANYINGLIJIZHONGQU,HAISHIDEBIAOCENGZUZHIZHONGαXIANGFENBUDEZHIMIDUZENGJIA。PENWANYINGHUAZHISHIBIAOCENGXIANWEIYINGDUZHIFASHENGBIANHUA,XINGCHENGYIGESHENDUYOUJIN260μmDETIDUFENBUCENG,BIAOMIANYINGDUDADAOHV433,JIAOWEIPENWANXIANGBIYEYOUJINHV50DETISHENG。

比分波胆        (4)PENWANHOUPILAOYUANSHENDUDADAO258μm,JIAOWEIPENWANSHIYANGDE38μmXIANGBIZENGJIADA220μm。

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