Apo injiniya anonyora an inconel chikamu kune chikumbiro chinoda, Alloy 625 uye Alloy 718 dzinowanzo onekwa pane imwecheteyo pfupilist. Ose ari nickel-based superalloys ane yakanakisa yepamusoro-tembiricha kugadzikana. Ose ari maviri anopikisa oxidation. Ose ari maviri anowanikwa mubhawa, ndiro, uye mafomu ekukanda. Asi ivo vakagadzirirwa nzira dzakasiyana dzekutadza, uye kusarudza iyo isiriyo inogona kutungamira kune nguva isati yakwana kana kuti yakawedzera-yakagadzirwa chinhu chinowedzera mutengo pasina kuwedzera hupenyu hwesevhisi.
Musiyano hausi wekuti ndeupi alloy "yakasimba" kana kuti "inoshingirira kukora" mune zvakajairika. Iri pamusoro pekuti ndeipi nzira yekusimbisa inofanana nekutyisidzira kukuru kwekuderedzwa. Inconel 625 inotsamira pane yakasimba mhinduro kusimbaradza kwayo kusaita ngura uye kugadzikana kwekushisa. Inconel 718 inoshandisa kunaya kwemvura kuomesa kuti iwane simba rakanyanya, asi simba iroro rine tembiricha sirin'i. Kunzwisisa panogara sirin'i iyoyo, uye chii chinoitika kunze kwayo, ndiyo yekutanga nzvimbo kune yega yega inconel chikamu chisarudzo chekusarudza.
Ichi chinyorwa chakanyorerwa aerospace, petrochemical, uye yakakwirira-tembiricha michina mainjiniya uye vatengi vanoda kushanda sarudzo sarudzo. Inotarisa pane iyo metallurgical logic kuseri kwealloy yega yega, mamiriro ebasa anofarira imwe pamusoro peimwe, uye mafungidziro ekugadzira ayo anoona kana iyo yakatsanangurwa alloy ichiita sezvakarongwa.
The Core Musiyano: Solid Solution Kusimbisa vs Kunaya Kuoma
Nzira iri nyore yekugadzira mutsauko ndeiyi: Inconel 625 inowana simba rayo kubva kune yakanyungudika mairi; Inconel 718 inowana simba rayo kubva kune inodonha kubva mairi.
Inconel 625 (UNS N06625) yakasimba-mhinduro yakasimbiswa alloy. Molybdenum (8-10%) uye niobium (3.15-4.15%) inoramba yakanyunguduka mu nickel-chromium matrix, ichikanganisa crystal lattice uye inodzivisa kufamba kwekufamba. Uku kusimbaradzwa kuripo mune se-inopihwa mamiriro. Hapana kurapwa kwekuchembera kunodiwa. Iwo maumbirwo akafanana ayo anopa simba-kunyanya iyo yakakwira molybdenum uye chromium zvemukati-inoburitsawo alloy yakasarudzika corrosion kuramba. Inconel 625 ichokwadi, igora rinoita corrosion alloy inoitika kuva nesimba rinobatsira, pane alloy simba rinoitika rinopesana nekuora.
Inconel 718 (UNS N07718) inoshanda neimwe musimboti. Niobium (4.75-5.5%) inosanganiswa nickel panguva yekukwegura kuti iite gamma double prime (Ni₃Nb) precipitates, ichishanda pamwe chete negamma prime (Ni₃Al/Ti) kupa iyo yekutanga kusimbisa simba. Mumamiriro ekugadziriswa-akagadziriswa, 718 yakapfava. Mushure mekuchembera, simba regoho rayo rinosvika 1000-1100 MPa zvichienderana nechimiro chechigadzirwa uye kutsanangurwa, zvichienzaniswa neanowanzo 320-450 MPa ye annealed 625. Musiyano iwoyo - kaviri kana katatu simba regoho-inotsanangura kuti sei 718 inotonga zvakanyanya-stress inotenderera zvikamu.
Inconel 600, dzimwe nguva inosanganiswa neaya alloys muhurukuro nickel-alloy, iNi-Cr alloy isina molybdenum kana niobium kuwedzera iyo inotsanangura 625 uye 718. Kusimbisa kwayo uye kusagadzikana kwekuora zvose zviri zviviri zvishoma, uye inogara kunze kwechiyero chekuenzanisa uku.
For an inconel chikamu uko kutyisidzira kukuru kuri chloride pitting kana acidic kurwisa, 625's solid-solution chemistry ndiyo yakakosha mukana. Ikoko kutyisidzira kwekutanga kuneta kana goho pasi pemutoro wakakwira pane tembiricha ine mwero, 718's precipitation-yakaomeswa chimiro ndiyo sarudzo yakakodzera. Chinyorwa ichi chasara chinoongorora panoitika mamiriro aya.
Maitiro eTembiricha uye Corrosion Mamiriro Anosarudza Sarudzo
Inconel 625: Corrosion-Dominated Service uye Welded Structures
Inconel 625 ndiyo yakasarudzika dhizaini kana corrosion kuramba iriyo sarudzo. Yayo molybdenum inopa pitting uye crevice corrosion resistance munzvimbo dzine chloride-bearing, ine pitting resistance yakaenzana nhamba (PREN) yakakwirira zvakanyanya kupfuura iyo ye718 nekuda kweiyo molybdenum yakakwira. Mumvura yegungwa, acidic process hova, uye inovava gasi sevhisi, kuramba uku ndicho chikonzero 625 inosarudzwa kwete imwe yakakwirira-simba. Iyo alloy inoshandiswa kune subsea flowlines, makemikari ekugadzirisa midziyo inosanganisira mavharuvhu uye kupisa exchanger, uye marine exhaust masisitimu.
Kugona kwekushisa kwe625 kazhinji hakunzwisiswi. Iyo alloy inochengeta simba rinobatsira uye oxidation kuramba kusvika 980°C, uye mamwe masosi anodudza tembiricha yebasa inosvika 1093°C kune mamwe mafomu echigadzirwa. Asi "simba rinobatsira" pa980 ° C harina kufanana nepamusoro-soro yekutakura iyo 718 inopa pakudzika kwakadzika. Inconel 625 pane tembiricha yakakwira inosarudzirwa oxidation kuramba uye kugadzikana kwechimiro, kwete yekusimba kwegoho pasi pemutoro unorema.
Iyo yekugadzira mukana we625 yakakosha zvakaenzana. Iyo alloy inogona kushandiswa mumamiriro e-welded pasina post-weld kupisa kurapwa uye inopesana ne intergranular corrosion kunyange mune welded mamiriro. Kune zvimiro zvakashongedzerwa, weld overlay cladding, uye machira akaomarara uko post-weld kuchembera kwaizounza kukanganisa kana kuwedzera mutengo, iri nyore idanho rinoshanda rekusarudza. Iyo alloy inowanzo shandiswa seweld overlay pamusoro pekabhoni simbi yebasa rinovava, uko kuvharika kunopa kusagadzikana kwekuora pasina kuda kupisa kurapwa kwechikamu chose.
Inconel 718: Simba-Inotongwa Sevhisi Pazasi Pehwindo Rekuchembera
Inconel 718 ndiyo inotonga superalloy ye-high-stress applications pazasi angangoita 650°C. Jet engine turbine discs, masimbi akasimba, oiri negasi anodzika maturusi, uye roketi injini turbopump zvese zvinotsamira pazera re718 simba. Iyo alloy's creep uye kusagadzikana-kuputika kuita kwakanakisa mune iyi siyana.
Pamusoro pekushisa ikoko, nzira yekusimbisa inotanga kukundikana. Iyo gamma yakapetwa kaviri precipitates inopa 718's simba coarsen uye kushandura kune delta chikamu patembiricha yakatenderedza 650 ° C uye pamusoro, zvichikonzera kurasikirwa kwesimba. Uku hakusi kuderera zvishoma nezvishoma kunogona kutarisirwa nekuchengetedza chinhu. Iyo ishanduko yechikamu inoshandura maitiro akakosha ealloy. Kusevhisi yakasimba pamusoro pe650-700 ° C, 718 haisisiri sarudzo yakakodzera pane simba, zvisinei nekamuri-tembiricha yayo. Iyo chaiyo yekumusoro muganho inoenderana nekushushikana uye hupenyu hunodiwa, asi iyo michina inoisa muganhu unoshanda usingakwanisi kugadzirwa kutenderedza nekusingaperi.
Inconel 718 ine inobatsira corrosion resistance. Inopikisa oxidation uye akawanda aqueous media zvakaringana kune zvimiro zvekushandisa. Asi mune aggressive chloride kana kuderedza asidhi nharaunda, yakaderera molybdenum content (2.8–3.3%) uye yakakwirira iron content inoita kuti isanyanya kusimba pane 625. An inconel chikamu inotsanangurwa mu718 yekushandiswa kwekuora ingangonyanya kutaurwa pamusoro pesimba uye kushomeka-kutsanangurwa pakuramba kukora. Mafungiro ekusarudza anofanirwa kuteedzera yakanyanya kutadza modhi, kwete yakajairika sarudzo ye "yepamusoro kuita" alloy.
Yakajairika Inconel Chikamu Mafomu uye Ipo Imwe neimwe Alloy Inokodzera
Valve Bodies uye Chemical Processing Zvikamu
Mukugadzirisa kemikari, miviri yevharuvhu uye zvemukati zvinotarisana nemusanganiswa wezvinosvibisa midhiya, erosive kuyerera, uye chisimbiso-pamusoro pezvido. Kana iyo nzira yekuyerera iine ma chlorides, kuderedza asidhi, kana kutonhora kwemvura yegungwa, Inconel 625 ndiyo yakakodzera kutaurwa. Yayo molybdenum yemukati inogadzirisa gomba uye crevice corrosion pamaflange uye zviso zvekuisa chisimbiso, uye iyo as-welded usability inorerutsa kugadzirwa kwemavharuvhu geometries.
Inconel 718 inoonekwa musevhisi yemakemikari kunyanya mune yakakwira-kudzvanya fasteners uye maumbirwo ezvikamu apo simba ndiro rinodikanwa rinotonga, pane munzvimbo dzakanyorova dzakafumurwa kumakemikari ane hukasha. For an inconel chikamu iyo inosanganisa mabasa ese ari maviri-yakanyanya-kunetsekana chikamu chinobatawo corrosive media-kusarudzwa kungada kuregeredza kana imwe alloy yakasiyana zvachose.
Verification note: Webhusaiti yezvino mapeji ezvigadzirwa anovhara Inconel 600 uye Inconel 718. Kuwanikwa kweInconel 625 zvikamu kunofanira kusimbiswa kusati kwataura 625 sechinhu chinopihwa.
Turbine Seals, Discs, uye High-Stress Inotenderera Zvikamu
Mumuchadenga uye gasi turbine application, 718 ndiyo inogadzika maturbine discs, compressor discs, shafts, uye high-stress static zvikamu zvinoshanda zviri pasi pe650°C. Iko kusanganiswa kwealloy kwesimba regoho repamusoro, kuramba kuneta, uye kusagadzikana-kuputika kugona mune ino tembiricha inonetsa kutsiva. Turbine zvisimbiso zvinosangana nepamusoro pekubata mitoro uye kupisa bhasikoro zvinowanzotsanangurwa muna 718 kana zviso zvechisimbiso zvisingaonekwe nekurwiswa kwakanyanya kunoparadza.
Inconel 625 inoonekwa mumasisitimu emagetsi einjini, ducting, uye zvikamu uko oxidation kuramba uye kushorwa kwemarara kwakakosha kupfuura kutakura mutoro. Sarudzo pakati pezviviri munzvimbo yeturbine inowanzotevera mubvunzo wakajeka: chikamu chacho chinonyanya kurongeka nzira, kana kuti chikamu chemukati uye chinoyerera-nzira? Yekutanga inofarira 718; yechipiri inofarira 625.
Manifolds, Fasteners, uye Exhaust Zvikamu
Fasteners ndeye classic 718 application. Yakakwira preload, kuramba kushushikana kuzorora, uye kuneta kuramba pasi pe cyclic kurodha ndizvo zvinotonga zvinodiwa, uye 718's echembere simba uye kushushikana-kuputika kuita zvakanangana navo. Ijoinhi yakasungwa nepamusoro-tembiricha yakataurwa mu625 ingangoda chisungiso chikuru kana kuti yakaderera preload kuti iwane kuita kwakaenzana, ichiwedzera huremu nekuoma.
Exhaust manifolds uye zvimwe zvakafanana zvinopa nyaya ine nuanced. Kana tembiricha yekushanda ikaramba iri pasi pe650 ° C uye nharaunda iri oxidizing asi isingaparadzi zvakanyanya, 718 isarudzo ine musoro. Kana iyo inoyerera ine chloride-inobereka condensates kana acidic marudzi, 625's corrosion resistance inogona kudarika simba re718. Sarudzo inofanira kubva pane chaiyo gasi kemikari uye tembiricha yesimbi, kwete pane fungidziro yakajairika yekuti simba repamusoro rinogara rakanakira.
Kugadzira uye Kukanda Matambudziko: 625 vs 718
Machining Behaviour
Ose maviri alloys akaoma muchina kana achienzaniswa nesimbi isina tsvina, asi nezvikonzero zvakasiyana. Inconel 625 mune annealed mamiriro ari gummy uye inoshanda-inoomesa nekukurumidza. Machipisi akareba uye ane tambo, kupfeka kwezvishandiso kunokwidziridzwa, uye zvinhu zvacho zvinogara zvichisundira kure kubva kumucheto wekucheka pane kugera zvakachena. Sharp tooling, high-pressure coolant, uye conservative feeds zvakakosha kuti udzivise kuomarara kwepamusoro layer inovhiringa maoperation anotevera.
Inconel 718 inowanzo gadzirwa mune mhinduro-yakarapwa kana zvishoma zera mamiriro, wobva wakura mushure mekugadzira. Kuoma kwayo kwepamusoro-soro kunoreva kupfeka kwechishandiso ndicho chinhu chinonyanya kunetsa, asi kuumbwa kwechip kunonyanya kufanotaurwa uye kutonga kwedimensional kazhinji kuri nani pane ne625. Nzira inoshanda kune vakawanda inconel chikamu kugadzira ndeyekukasharara muchina mune yakapfava mamiriro, zera, wozopedzisa muchina uine mvumo yekuchinja kwema dimensional kunoburitswa nekuchembera.
Welding uye Post-Weld Kurapa
Inconel 625 inogona kusungirirwa uye kuiswa mubasa pasina post-weld kupisa kurapwa, uye alloy inopikisa intergranular corrosion kunyange mune welded mamiriro. Uyu ndiwo mukana chaiwo wekugadzira kumagungano makuru kana akaomarara uko post-weld kuchembera kutenderera kungave kusingaite kana kuunza kukanganisa. Iyo alloy inoshandiswawo zvakanyanya seweld overlay yekudzivirira ngura, inoshandiswa kune kabhoni simbi kana yakaderera-alloy substrates pasina kuda kupisa kurapwa kwechikamu chakapedzwa.
Inconel 718 inobatika, asi zvinhu zvakasungwa kazhinji zvinoda post-weld kuchembera kudzoreredza simba munzvimbo yeweld uye inopisa-yakakanganiswa. Iyo welding process pachayo inogona kuburitsa yakakandwa-senge microstructure ine kupatsanurwa iyo inokanganisa inotevera kuchembera mhinduro. Kune akasungwa 718 zvimiro, kutenderera kwekupisa kunove chikamu chekugadzira yakakosha nzira, kwete yekusarudzika yekupedzisa nhanho.
Kufunga nezvazvo
Ose ma alloys anogona kuve ekudyara kukandwa, asi maitiro ekudzora zvinodiwa anosiyana. Inconel 718 ine niobium yakakwana iyo Laves chikamu chinogona kuumba panguva yekusimba. Iyi nhanho inokuvadza kune mechanical properties uye inofanira kunyungudutswa kuburikidza nemhinduro kurapwa vasati vakwegura. Yakajairwa kupisa kurapwa kwecast 718, sekutsanangurwa kwazvino mu AMS 5383, inosanganisira homogenization inoteverwa nemhinduro kurapwa uye nhanho mbiri kuchembera. Iyo yekukanda maitiro uye hurongwa hwekurapa kupisa kwe718 inofanirwa kugadzirwa seyakabatanidzwa system, kwete seyakaparadzana mashandiro. Inconel 625 inonyanya kuregerera mukukanda, kunyangwe kutonga kwekuparadzanisa muzvikamu zvakakora kunoramba kwakakosha.
For an inconel chikamu izvo zvinoda zvose kukanda uye simba rakakwirira, 718's kupisa kurapa chikamu chakakosha chekuzadzisa zvivakwa zvakatarwa. Iyo yakakandwa 718 chikamu chisina kuwana mhinduro chaiyo-uye-zera kurapwa haizounzi simba iro rinorehwa nearoyi zita.
Sarudzo Yekusimbisa Chekutarisa
Rondedzero inotevera inoitirwa kushandiswa pamberi pekotesheni kana dhizaini yekuongorora, senzira yekusimbisa kuti sarudzo yealloy inofanana neinotungamira sevhisi inodiwa.
| Mubvunzo Wekusimbisa | Kana Hongu | Kana Kwete |
| Ndiyo yekutanga kutadza modhi corrosion (pitting, crevice, acidic attack)? | 625 ndiyo nzvimbo yakakodzera yekutangira | Enda kumubvunzo unotevera |
| Tembiricha yesevhisi inoenderera inopfuura 650°C here? | 625 kana imwe alloy mhuri yakasiyana; 718 simba rakanaka rakarasika | Enda kumubvunzo unotevera |
| Chikamu chinoda simba regoho pamusoro pe800-900 MPa? | 718 (akwegura mamiriro) | Enda kumubvunzo unotevera |
| Icho chikamu ndeye welded yekugadzira iyo isingakwanise kuve post-weld akwegura? | 625 | 718 inogona kutariswa |
| Ko zvese zviri zviviri ngura uye kushushikana kwakanyanya kuripo pane tembiricha ine mwero? | Inoda nyaya-yakananga ongororo; njodzi yekuora inowanzofarira 625 | — |
Iyo 800–900 MPa pachikumbaridzo patafura iyi mutsauko unoshanda pakati peiyo yakajairika goho simba re annealed 625 uye ane makore 718. Haisi yezvakatemerwa muganhu. Kusarudzwa kwezvinhu zvekupedzisira kunofanirwa kuve kwakavakirwa pane izvo chaizvo dhizaini zvinodiwa uye inoshanda zviyero zveiyo chaiyo inconel chikamu.
FAQ
Iyo Inconel 718 yakasimba kupfuura 625 pane zvese tembiricha?
No. 718's strength advantage inoenderana negamma double prime precipitates inoramba yakatsiga pazasi ingangoita 650°C. Pamusoro petembiricha iyoyo, mvura inonaya inokora uye inoshanduka, uye mukana wesimba unodzikira. Inconel 625's solid-solution kusimbaradza hakunei nechikamu chemvura uye inoramba ichishanda pakupisa kwepamusoro, kunyangwe padanho resimba rakadzika.
Ko Inconel 625 ingave yakura kuti ifanane nesimba re718?
Kwete. Inconel 625 haina titanium, aruminiyamu, uye niobium balance inodiwa pakunaya kukuru kwemvura. Simba rayo rinobva ku molybdenum uye niobium mune yakasimba mhinduro, uye kurapwa kwekuchembera hakuburitse gamma double prime precipitates inosimbisa 718.
Ndeipi alloy iri nani pakushandisa mvura yegungwa?
Inconel 625. Yayo molybdenum inopa pitting uye crevice corrosion resistance ine PREN yakakwirira zvakanyanya kudarika 718, uye inonyanya kuzivikanwa nebasa remvura yegungwa rinosanganisira piping, fittings, uye marine components. Inconel 718 ine corrosion resistance yakaringana yenzvimbo dzakawanda asi haisiriyo sarudzo inosarudzika yehasha chloride sevhisi.
Sei Inconel 718 ichida kurapwa kuchembera?
Mumamiriro ekugadziriswa-akagadziriswa, 718's alloying elements anoramba ari mumhinduro uye alloy iri kupfava. Kuchembera kunokonzeresa gamma kaviri prime (Ni₃Nb), iyo inotadzisa kusimuka kufamba uye inoburitsa simba repamusoro iro rinotsanangurwa alloy. Pasina kuchembera, chikamu che718 hachizadzise chinangwa chayo chemuchina.
Ko ese ari maviri alloys anogona kuve investment cast?
Hongu. Ose ari maviri anogona kugadzirwa neinvestment casting. Inconel 718 kukanda kunoda mhinduro kurapwa kunyungudutsa Laves chikamu chakaumbwa panguva yekusimba, inoteverwa nekuchembera kukudziridza simba. Kurapa kwekupisa chikamu chakakosha chekugadzira, kwete danho rekusarudza. Inconel 625 kukanda kuri kuregerera zvakanyanya, kunyangwe kutonga kwekuparadzanisa kunoramba kwakakosha kune zvikamu zvakakora.
Nhanho inotevera: Matanidza iyo Mechanism kune Kukundikana Modhi
Sarudzo pakati peInconel 625 uye 718 ye inconel chikamu inofanira kutevera mubvunzo mumwe chete wekuronga: chii chinonyanya kushatisa nzira? Kana corrosion-pitting, crevice attack, acidic kana chloride-bearing media-ndiyo ngozi inovimbika, 625's solid-solution chemistry uye molybdenum zvirimo zvinozvigadzirisa zvakananga, uye as-welded usability inorerutsa kugadzira. Kana kushushikana kwakanyanya, kuneta, kana goho riri pasi pemutoro uri pasi pe650 ° C chiri chinodikanwa chekutonga, 718's precipitation-yakaomeswa simba ndiyo chaiyo yakatarwa, chero tembiricha sirin'i inoremekedzwa.
Kune maapplication uko zvese corrosion uye yakanyanya kushushikana zviripo, kana alloy ndiyo mhinduro yepasirese. Ongororo yacho inofanirwa kuyera mhedzisiro yekutadza kukora inopesana nemhedzisiro yekutadza kwemuchina, uye funga kuti chimwe chinhu chakasiyana kana nzira yekudzivirira pamusoro ingagadzirisa zvese zvinodiwa zvakanyanya.
Kuongorora zviripo Inconel chikamu zvakatemwa, kusanganisira Inconel 600 uye Inconel 718 ruzivo rwechigadzirwa, shanyira mapeji akakodzera echigadzirwa. YeInconel 625 zvikamu kana tsika dzakakandwa uye dzakagadzirwa zvinhu mune chero alloy, simbisa yazvino yekugadzira chiyero uye yekupisa kurapwa kugona zvakananga usati wataura.
