<dfn id="bff5v"></dfn>

<big id="bff5v"></big>
<strike id="bff5v"><video id="bff5v"></video></strike><center id="bff5v"><em id="bff5v"></em></center>

    1. <code id="bff5v"><nobr id="bff5v"><track id="bff5v"></track></nobr></code>
      <code id="bff5v"></code>
      1. <th id="bff5v"><video id="bff5v"></video></th>
        1.  
          咨詢熱線:021-5109 9702 /  5109 9703
          貝仕托(上海)機械設備有限公司??
          021-5109 9702
          資訊中心
          NEWS CENTER
          咨詢服務熱線

          資訊詳情
          NEWS CENTER
          鐵素體不銹鋼特性以及用途
          來源: | 作者:pro3c65e5 | 發布時間: 2017-09-06 | 4785 次瀏覽 | 分享到:
          鐵素體不銹鋼(400系)含鉻量在15%~30%,具有體心立方晶體結構。這類鋼一般不含鎳,有時還含有少量的Mo、Ti、Nb等元素,這類鋼具有導熱系數大,膨脹系數小、抗氧化性好、抗應力腐蝕優良等特點,多用于制造耐大氣、水蒸氣、水及氧化性酸腐蝕的零部件。鐵素體不銹鋼的寒鐵特性不如奧氏體不銹鋼,需要進行焊接前預熱,焊后熱處理。
          1、鐵素體不銹鋼的耐大氣腐蝕性

          由于鐵素體不銹鋼具有良好的耐大氣腐蝕性,近來一直被用作建筑物的屋頂和幕墻。但是,離海較近地區的大氣環境特別惡劣,尤其是來自海水空氣中的懸浮微粒是相當強的腐蝕性物質,因此,在這些環境下使用的高鉻鐵素體不銹鋼得到了開發??勾髿飧g的不銹鋼含有高鉻和高鉬,并添加了少量的鈮和鈦。該鋼種實際含22%的鉻和1.2%的鉬,足夠的鉻和鉬對改善不銹鋼的耐點蝕能力是必不可少的。304型和316型奧氏體不銹鋼隨著周期腐蝕試驗周期次數的增加,生銹面積顯著增多。相反,如:444型及研發鋼種這樣的鐵素體不銹鋼,在前600次試驗周期內,生銹面積稍微增加,而在經過更長的試驗周期后,生銹面積處于飽和狀態。研發鋼種(22Cr—1.2Mo—Nb,Ti)則顯示出其在任何試驗周期生銹面積均為最少的特性。
          鐵素體不銹鋼特性以及用途

          2、鐵素體不銹鋼的耐晶間腐蝕性

          410L或409型不銹鋼由于具有良好的耐腐蝕性、成形性及耐熱性而被用作汽車尾氣排放控制系統材料。近幾年來,汽車排氣的設計溫度提高了,這是因為汽車排氣溫度的升高能夠提高催化轉化器的轉化效率,減少有害氣體諸如NOx、SOx以及碳氫化合物(HC)的排放量。但溫度的提高可能導致材料的腐蝕條件更惡劣。例如,在排氣溫度下碳化鉻將在消音器上產生沉積物,即在400~500℃的溫度下,將導致晶界貧鉻,發生晶間腐蝕。由于焊縫區域對晶間腐蝕特別敏感,有必要對含12%Cr的鐵素體不銹鋼提高其耐腐蝕性。解決此問題的另一條途徑是研發新的鐵素體不銹鋼。其中一例是對含12%Cr的鋼中添加鈮。這些鋼作為耐晶間腐蝕材料廣泛應用于汽車尾氣排放系統中,如前導管、中心管及消音器上。眾所周知,降低鋼中的碳和氮含量對防止晶間腐蝕是相當有效的。這樣,在鋼中添加鈮和鈦就可以進一步提高其耐晶間腐蝕性。

          3、鐵索體不銹鋼的可成形性

          鐵素體不銹鋼的用途是如此的廣泛,每種用途所要求的鐵素體不銹鋼的性能又各自不同。然而,鐵素體不銹鋼的可成形性比奧氏體不銹鋼如304鋼要差。盡管鐵素體不銹鋼的γ值、即深沖性指數在1.0~2.0較寬的范圍變化,但n值,即延展性指數有限,約為0.2,比奧氏體不銹鋼的0.4~0.65低。對于拉延成型制品,很難用鐵素體不銹鋼代替奧氏體不銹鋼,如要代替就必須改變制品的設計,把它設計成拉延成型的形狀。

          鐵素體不銹鋼特性以及用途

          4、鐵素體不銹鋼的韌性

          關于鈦和鈮對壓力成形性的作用已進行了很多研究,其焦點主要集中于平均γ值的研究,所得出的結論是適量的這些元素可有效地改善壓力成形性。但是,過量添加這些元素也會產生有害影響。例如,隨著鈦和鈮含量的增加,縱向裂紋的轉化溫度也隨之提高。即使鐵素體不銹鋼具有良好的平均γ值,但韌性脆性轉變溫度可能對深沖性造成損壞。由于轉變溫度對可成形性是決定性的因素之一,在較高的轉變溫度下,變形可能難以進行。

          5、鐵素體不銹鋼的高溫強度

          409L(11Cr—Ti)不銹鋼被用作汽車排氣歧管的材料,排氣溫度設計為大約800℃。當排氣溫度約為900℃時,使用430J1L(18Cr—0.4Nb—0.5Cu)不銹鋼。但是,排氣溫度還在提高,這就要求進一步提高不銹鋼的質量。這樣,傳統的高鉻鐵素體不銹鋼的耐熱性就不能滿足排氣歧管的要求。因此,對具有成本競爭性的耐高溫鐵素體不銹鋼一直有強烈的需求??紤]到這種需求,一直在研究加入鈮和鉬對高溫性能的影響。

          鐵素體不銹鋼特性以及用途                                                                                             汽車排氣系統

          中文字幕亚洲欧美日韩2o19_亚洲va在线va天堂va电影_久久亚洲?欧美 国产 综合_在线视频欧美成 人在线?视频 www.billashton.com
          www.taifengqiche.com www.x5computadores.com www.sarahtollemache.com www.pralpacas.com www.9899x.com www.goclickmail.com www.tupaginagratis.com www.777slotgame.com www.qsyyb.com www.fdwzcg.com www.aralikedebiyat.com www.glennogilvie.com www.plaincabin.com www.aceisone.com www.danran999.com www.xdldx.com www.melimport.com www.noahleans.com www.28gono.com www.assentchemicals.com www.wdastudio.com www.bcreview2.com www.zhongtigroup.com www.pagesandprint.com www.winselectronics.com www.vivibooks.com www.statestreetal.com www.fusionauditiva.com www.chzte.com www.andrewcortes.com www.iqufenbao.com www.itshoken.com www.trimarksp.com www.karakartalhaber.com www.erhanbilgisayar.com www.bycroftlodge.com www.softcoverinc.com www.hipsmith.com www.tuolian666.com www.cnzhonghai.com www.karateoz.com www.cmplasvisa.com www.ryouhinichiba.com www.nuevofiatlinea.com www.bbccdining.com www.trimarksp.com www.karakartalhaber.com www.erhanbilgisayar.com www.bycroftlodge.com www.softcoverinc.com www.hipsmith.com www.tuolian666.com www.cnzhonghai.com www.karateoz.com www.cmplasvisa.com www.ryouhinichiba.com www.nuevofiatlinea.com www.bbccdining.com www.irtip.com www.billashton.com www.gridironpics.com www.goforjoke.com www.cateringvenezia.com www.jinchengjipiao.com www.egerszallas.com www.martrinex.com www.aktisitalia.com www.promusicstuff.com www.firmenanzeiger.com www.sydmachat.com www.myazonline.com www.kutahyacinileri.com www.ritmazogrupero.com www.sangqigui.com www.famlomas.com www.shoudi49.com www.sapientcons.com www.kwpkl.com www.visiteasingwold.com www.znl24.com www.ruvumatv.com www.machotools.com www.3uan.com www.qgjpl.com www.kutahyacinileri.com www.ritmazogrupero.com www.sangqigui.com www.famlomas.com www.shoudi49.com www.sapientcons.com www.kwpkl.com www.visiteasingwold.com www.znl24.com www.ruvumatv.com www.machotools.com www.3uan.com www.qgjpl.com www.ganrao7.com www.thequietband.com www.3030mbs.com www.sunburstknobs.com www.aceisone.com www.danran999.com www.jiujire.com www.samialanazi.com www.hotelshabitat.com www.ok18198.com www.charliesdivas.com www.jeaonline.com www.advantagecraps.com www.analhits.com www.naftabusiness.com www.zhuojue54.com www.qufree.com www.ryoushuushotou.com www.amrlimousines.com www.coffeemezurich.com www.ttbjia.com www.axa82.com www.allcamsfree.com www.wardans.com www.autoblachy.com www.mahstar.com www.softwarebuffet.com www.naftabusiness.com www.zhuojue54.com www.qufree.com www.ryoushuushotou.com www.amrlimousines.com www.coffeemezurich.com www.ttbjia.com www.axa82.com www.allcamsfree.com www.wardans.com www.autoblachy.com www.mahstar.com www.softwarebuffet.com www.prjjr.com www.520tiffany.com www.0416hdjob.com www.bubunohoshi.com www.techpoolindia.com www.elainecharton.com www.netcamino.com www.babesofsports.com www.wearenotlosers.com www.lwjjh.com www.cvaclan.com www.kimannfoxman.com www.stoneforhomes.com www.bisorumvar.com www.invercence.com www.lima5krun.com www.wesearchers.com www.abelago.com www.fynmorestudios.com www.q8cost.com www.stevemead.com www.ykchia.com www.onlinemaske.com www.msinsu.com www.jingancheng.com www.boomerdivatv.com www.bisorumvar.com www.invercence.com www.lima5krun.com www.wesearchers.com www.abelago.com www.fynmorestudios.com www.q8cost.com www.stevemead.com www.ykchia.com www.onlinemaske.com www.msinsu.com www.jingancheng.com www.boomerdivatv.com www.ywsandu.com www.torchbynight.com www.anju15.com www.tkhphotography.com www.sentouonshen.com www.yjtogo.com www.thepash.com www.cocolouisenalty.com www.ywlxg.com www.fandidatuan.com www.thequietband.com www.3030mbs.com www.sunburstknobs.com www.baejy.com www.9imms.com www.znl28.com www.aaronashford.com www.baldurmcqueen.com www.mattview.com www.fmabril.com www.ironageqh.com www.awtalk.com www.atlantisbcm.com www.vincentchiao.com www.mybootlink.com www.71pop.com www.baejy.com www.9imms.com www.znl28.com www.aaronashford.com www.baldurmcqueen.com www.mattview.com www.fmabril.com www.ironageqh.com www.awtalk.com www.atlantisbcm.com www.vincentchiao.com www.mybootlink.com www.71pop.com www.infusehotsauce.com www.ccaduow.com www.iwamotokaho.com www.looveventing.com www.zunyixllbj.com www.alldayhell.com www.taifengqiche.com www.linkautomatici.com www.shughalmela.com www.cerwingvega.com www.bioerre.com www.robinstuart.com www.zemthemes.com www.bjws824.com www.atriemensemble.com www.mariasjewellery.com www.b2mlures.com www.covercharge1.com www.brecherspitz.com www.tdnlw.com www.pralpacas.com www.waldymalouf.com www.lgnrevolution.com www.rssaround.com www.jeansoft.com www.kerryfeltham.com www.bjws824.com www.atriemensemble.com www.mariasjewellery.com www.b2mlures.com www.covercharge1.com www.brecherspitz.com www.tdnlw.com www.pralpacas.com www.waldymalouf.com www.lgnrevolution.com www.rssaround.com www.jeansoft.com www.kerryfeltham.com www.tomgaffey.com www.partnerjouet.com www.fadimem.com www.ptclio.com www.eunicehong.com www.ragsista.com www.sistavoyage.com www.kimfish.com www.mvbct.com www.saseventdesign.com www.pashunbiotech.com www.firstgabnk.com www.jiujiure23.com www.paternembrot.com www.enjoywithjoy.com www.gistflux.com www.mrstextiles.com www.cocolouisenalty.com www.ywlxg.com www.fandidatuan.com www.lynnboston.com www.kugoikuhiro.com www.spirulifestyles.com www.gobotlogos.com www.kordramasia.com www.lwqyk.com www.tkhphotography.com www.sentouonshen.com www.yjtogo.com www.thepash.com www.cocolouisenalty.com www.ywlxg.com www.fandidatuan.com www.lynnboston.com www.kugoikuhiro.com www.spirulifestyles.com www.gobotlogos.com www.kordramasia.com www.lwqyk.com www.aarontaa.com www.visitpeterhead.com www.zhengzhou00.com www.melodiepark.com www.thespringsofps.com www.drycreeksoccer.com www.poundsigntees.com www.shidaizuoyi.com www.shajunguo123.com www.zhongguiyuan.com www.noblyinfo.com www.biophymed.com www.giftefair.com www.xtrateck.com www.se7insins.com www.artewka.com www.wqhcxc.com www.sqspg.com www.revbikeshopblog.com www.starmonkeybrass.com www.polygoninfotech.com www.sandorafoto.com www.bjyldk.com www.mogulmovies.com www.annsummerville.com www.normanbygateway.com www.maidenstudio.com www.peskybrain.com www.jundundjc.com www.intelyex.com www.godoris.com www.perfectfinishuk.com www.starmonkeybrass.com www.polygoninfotech.com www.sandorafoto.com www.bjyldk.com www.mogulmovies.com www.annsummerville.com www.normanbygateway.com www.maidenstudio.com www.peskybrain.com www.alizonmusic.com www.gamesyumi.com www.ftllz.com www.yabbtoolbar.com www.webhoker.com www.hotstudsweb.com www.cumbangz.com www.carnisurance.com www.x5computadores.com www.katebremer.com www.qhdzgbwb.com www.eurosigorta.com www.williamamanning.com www.hubcitybrush.com www.leighyoung.com www.philomathpumpco.com www.leovillanova.com www.73cpp.com www.thumbsoutcanada.com www.yongshenggz.com www.madamaki.com www.annevignial.com www.frankgorka.com www.itpramukh.com www.gistflux.com www.mrstextiles.com www.eunicehong.com www.ragsista.com www.sistavoyage.com www.kimfish.com www.mvbct.com www.saseventdesign.com www.pashunbiotech.com www.firstgabnk.com www.jiujiure23.com www.paternembrot.com www.enjoywithjoy.com www.gistflux.com www.mrstextiles.com www.buyturnkeysites.com www.dpsagro.com www.yantai29.com www.mekanodesign.com www.newyorkpetexpo.com www.moorewebsites.com www.gonewildandwet.com www.fishcookabc.com www.pbyyc.com www.dialmforminky.com www.hsrupdates.com www.zfzsr.com www.ralphsells.com www.janettestoll.com www.hukuksozluk.com www.watstherapy.com www.c4job.com www.3bukou.com www.hbzhuoxing.com www.dollyguide.com www.graficavaliente.com www.badtastebets.com www.noarlungamf.com www.icwja.com www.zrkpp.com www.askforporn.com www.janettestoll.com www.hukuksozluk.com www.watstherapy.com www.c4job.com www.3bukou.com www.hbzhuoxing.com www.dollyguide.com www.graficavaliente.com www.badtastebets.com www.noarlungamf.com www.icwja.com www.zrkpp.com www.askforporn.com www.bachatareno.com www.valledeicedri.com www.chrisacarlson.com www.grannysexmix.com www.tractorparadise.com www.samams.com www.atelierconebe.com www.13baymall.com www.rawlinsholden.com www.annodominiusa.com www.zenken8.com www.monsterinida.com www.healthcaresec.com www.cyberbred.com www.flickerbar.com www.etownmainst.com www.experimentslab.com www.merumitalia.com www.jordanshoeshunt.com www.meredosto.com www.c4k6.com www.bicanart.com www.biophymed.com www.xbergman.com www.chinajobinfo.com www.aikseng.com www.cyberbred.com www.flickerbar.com www.etownmainst.com www.experimentslab.com www.merumitalia.com www.x5computadores.com www.katebremer.com www.qhdzgbwb.com www.eurosigorta.com www.williamamanning.com www.hubcitybrush.com www.leighyoung.com www.philomathpumpco.com www.leovillanova.com www.73cpp.com www.thumbsoutcanada.com www.yongshenggz.com www.madamaki.com www.annevignial.com www.frankgorka.com www.itpramukh.com www.oishims.com www.myredwardrobe.com www.tdhjg.com www.pmgyp.com www.ouheh.com www.nelsonwolfe.com www.jackideas.com www.acholiweb.com www.hotfille.com www.growwithkeytree.com www.9899x.com www.cncroute.com www.human4sale.com www.huaduche.com www.sororitygourmet.com www.jerrytubbs.com www.javierpereira.com www.primalcoder.com www.nelsonwolfe.com www.jackideas.com www.acholiweb.com www.hotfille.com www.growwithkeytree.com www.9899x.com www.cncroute.com www.human4sale.com www.huaduche.com www.sororitygourmet.com www.jerrytubbs.com www.javierpereira.com www.primalcoder.com www.webfects.com www.ypzh021.com www.lvgoodshop.com www.wintechpromo.com www.zeeshank.com www.janicemobsby.com www.camefmx.com www.zhongyingxl.com www.wqhcxc.com www.cartonajesmunoz.com www.simmiroi.com www.assweekly.com www.inputmydata.com www.enfarte.com www.alksites.com www.kaladecor.com www.chattoys.com www.salascove.com www.mikepoynter.com www.lovepatricia.com www.minashouse.com www.happyvendorsday.com www.francescareggio.com www.hexplosion.com www.adamsjohn.com www.molinaebianchi.com www.tessamesa.com www.alksites.com www.kaladecor.com www.chattoys.com www.salascove.com www.mikepoynter.com www.lovepatricia.com www.minashouse.com www.happyvendorsday.com www.francescareggio.com www.hexplosion.com www.adamsjohn.com www.etownmainst.com www.experimentslab.com www.merumitalia.com www.jordanshoeshunt.com www.meredosto.com www.c4k6.com www.bicanart.com www.biophymed.com www.xbergman.com www.chinajobinfo.com www.aikseng.com www.fpdimages.com www.naifj.com www.craftworksmag.com www.okoktag.com www.polenmusic.com www.se730.com www.petarcelik.com www.oyunlar1oyna.com www.shinybridal.com www.dzguixin.com www.nsdisk.com www.jnhyp.com www.beijingqinhao.com www.elquincenal.com www.susidjewelry.com www.deluxe1cleaners.com www.penmacinc.com www.polenmusic.com www.se730.com www.petarcelik.com www.oyunlar1oyna.com www.shinybridal.com www.dzguixin.com www.nsdisk.com www.jnhyp.com www.beijingqinhao.com www.elquincenal.com www.susidjewelry.com www.deluxe1cleaners.com www.penmacinc.com www.marcaholidays.com www.wctz99.com www.iscpromoetudes.com www.nellbarnwell.com www.sudongnan.com www.shoukenhome.com www.islamwai.com www.jhunterpresents.com www.temcoeprint.com www.shamanicwealth.com www.gpqnn.com www.pamyelverton.com www.babystepsrehab.com www.alidadeinc.com www.zhenforum.com www.caboodesign.com www.faithsnap.com www.sqspg.com www.427copocamaro.com www.ifctraders.com www.huilizhupian.com www.cruiseguiding.com www.triplexvids.com www.now4share.com www.hztxec.com www.junyasono.com www.alidadeinc.com www.zhenforum.com www.caboodesign.com www.faithsnap.com www.sqspg.com www.427copocamaro.com www.ifctraders.com www.huilizhupian.com www.cruiseguiding.com www.triplexvids.com www.now4share.com www.hztxec.com www.junyasono.com www.amazonforays.com www.massbayboating.com www.chefsandco.com www.thecakefamily.com www.garciajorge.com www.srfwc.com www.hexplosion.com www.adamsjohn.com www.molinaebianchi.com www.tessamesa.com www.adoptivefam.com www.viewtheparty.com www.bigdoghobbies.com www.furuining.com www.1888local.com www.rmlassociates.com www.financephil.com www.technicalmafia.com www.mansionminds.com www.46hualong.com www.faceretro.com www.jerrywaddel.com www.mekurou.com www.crownfarmer.com www.ggssnn.com www.tupaginagratis.com www.furuining.com www.1888local.com www.rmlassociates.com www.financephil.com www.technicalmafia.com www.mansionminds.com www.46hualong.com www.faceretro.com www.jerrywaddel.com www.mekurou.com www.crownfarmer.com www.ggssnn.com www.tupaginagratis.com www.spottaiwan.com www.superchibi.com www.buspironepharm.com www.om0b.com www.tbtlh.com www.mydianpu.com www.gbsunglasses.com www.lankakamari.com www.starbagehands.com www.se7insins.com www.pcinfoshome.com www.jp83163285.com www.rockchiq.com www.mrxjw.com www.zhenbiaoxie.com www.wangchaott.com www.mandymischief.com www.grecolimousine.com www.giftefair.com www.annettemoen.com www.askincjapan.com www.cloudbreakinn.com www.capparentacar.com www.sarahtollemache.com www.smanconecrusher.com www.kiupishop.com www.mrxjw.com www.zhenbiaoxie.com www.wangchaott.com www.mandymischief.com www.grecolimousine.com www.giftefair.com www.annettemoen.com www.askincjapan.com www.cloudbreakinn.com www.capparentacar.com www.sarahtollemache.com www.smanconecrusher.com www.kiupishop.com www.kongdecheng.com www.qdbainou.com www.elkain.com www.aptoshealth.com www.davidloader.com www.omeletrecipe.com www.kroundtree.com www.clickmusica.com www.thirstforfire.com www.mcoole.com www.atlantarehabs.com www.agiosgsds.com www.ronkirkfortexas.com www.thecakefamily.com www.garciajorge.com www.srfwc.com www.johnfullard.com www.denalicycles.com www.amateurbrits.com www.jolytoy.com www.shaunlow.com www.nfcmtube.com www.car703.com www.w8m6.com www.quadtenerife.com www.cpmcasa.com www.desilassi.com www.garciajorge.com www.srfwc.com www.johnfullard.com www.denalicycles.com www.amateurbrits.com www.jolytoy.com www.shaunlow.com www.nfcmtube.com www.car703.com www.w8m6.com www.quadtenerife.com www.cpmcasa.com www.desilassi.com www.saraswatishg.com www.jackforgov.com www.banzheng339.com www.xushengtong.com