Tushen Turbine: Abubuwan Simintin Ɗaukaka, Haƙuri da Mahimman Bukatun Injini 

Ruwan turbine suna aiki a ƙarƙashin matsananciyar kwararar iskar gas mai zafi, damuwa mai zafi na cyclic, da kafofin watsa labarai masu lalata, yana mai da su ɗaya daga cikin abubuwan da suka fi ƙalubalanci don daidaiton simintin simintin a cikin masana'antar makamashi. Yawancin ƙungiyoyin saye da injiniyoyi suna fuskantar ƙalubalen samar da daidaito lokacin da ake samun ruwan injin turbin: iska mai katanga mai katanga yana fama da raguwar simintin gyare-gyare da nakasar, hadaddun tashoshi masu sanyaya cikin ciki suna haifar da karyewar asali, kuma kayan superalloy yana haifar da tsauraran matakan sarrafa injina da ƙalubalen sarrafa juriya.

Wannan jagorar ya ƙunshi zaɓin kayan gami, sarrafa tsarin simintin saka hannun jari, iyakokin tsarin tashoshi mai sanyaya, ƙayyadaddun juriya na juriya, ingantattun hanyoyin inji, da cikakkun ƙa'idodin binciken NDT don injin injin turbine. Yana kaiwa ga masana'antar zane-zane na al'ada, yana taimaka muku rage jujjuya simintin, sarrafa izinin injin, da guje wa sake yin aiki mai tsada akan sassa masu juriya mai zafi da lalata.

1. Yanayin Aiki & Ƙalubalen Ƙirƙirar Ƙarfafawar Turbine Blades

Gilashin turbine suna gudana a ƙarƙashin zafi mai ci gaba, hawan zafin jiki, da lalata sulfide. Tushen turbin gas na matakin farko na iya ɗaukar sabis na dogon lokaci sama da 900 ° C. Maimaita faɗaɗa yanayin zafi da ƙanƙancewa yana haifar da nakasu mai raɗaɗi da fashe gajiyar zafi.

Matsalolin Geometric yana haɓaka wahalar masana'antu:

• Kaurin bangon foil na bakin ciki (sau da yawa ƙasa da mm 1) yana haifar da ƙarancin narkakkar gami da rashin daidaituwa.
• Matsakaicin hanyoyin sanyaya na ciki na buƙatar shigar da muryoyin yumbu, waɗanda ke canzawa cikin sauƙi ko karaya yayin zubarwa.
• Ba za a iya samar da filaye masu lankwasa da yawa ta hanyar simintin yashi na yau da kullun ba. Simintin gyaran kafa kawai zai iya sadar da simintin simintin kusa-net.
• Superalloys na tushen nickel suna nuna ƙarfin aikin sanyi mai ƙarfi. Wannan yana haɓaka lalacewa na kayan aiki kuma yana lalata daidaiton ƙima yayin injinan CNC.

Babban abubuwan zafi na masana'anta sun haɗa da simintin simintin gyare-gyare, ɓangarorin asali, ɓarnar bayanin martabar ruwa, nakasar injin, da ƙarancin ramukan sanyaya ramukan fim daidaitattun daidaito.

2. Zaɓin Material Alloy Alloy Temple don Cast Turbine Blades

Zaɓin madaidaicin superalloy shine ginshiƙi na tsawon rayuwar sabis na ruwa. Matsayin kayan dole ne ya dace da zafin aiki, yanayi mai lalacewa, da buƙatun juriya. Wannan sashe yana mai da hankali kan manyan abubuwan da ake amfani da su na musamman na nickel jefa turbin ruwan wukake.

2.1 Babban Matsayin Superalloy don Turbine Blades

• Inconel 718 (UNS N07718)
  Ci gaba da zafin sabis har zuwa 700 ° C, tare da kyakkyawan ƙarfi mai ƙarfi da matsakaicin aiki mai rarrafe. Ana amfani dashi ko'ina don ƙananan ƙananan zafin jiki na turbin ruwan wukake da kwampreso ruwan wukake, yana ba da juriya mai kyau ga iskar gas da rigar lalata.
• Inconel 625 (UNS N06625)
  Ƙarfin juriya ga ramuka da lalata, mai dacewa da NACE MR0175 ka'idodin sabis na tsami. Yana aiki a hankali har zuwa 650 ° C kuma ya dace da ruwan wukake da aka fallasa ga yanayin iskar hayaƙi.
• Rene 80
  Simintin simintin gyare-gyare na yau da kullun tare da daidaitaccen ƙarfin zafin jiki da juriya na iskar shaka, wanda aka ƙera don ruwan injin turbine na tsakiyar mataki yana aiki ƙasa da 950°C.
• CMSX-4 (Single-Crystal Alloy)
  Babban matakin juriya mai jurewa don ruwan wukake matakin farko na HPHT. Ci gaba da sabis na iya kaiwa 1150 ° C ba tare da annashuwa ba. Ƙaddamar da kai tsaye yana kawar da iyakokin hatsi don inganta yanayin zafi mai zafi.

2.2 Dokokin Zaɓin Kayan Kaya bisa Muhallin Sabis

1. Gas mai tsami da yanayin lalata ruwan teku: Zaɓi Inconel 625 don ƙwaƙƙwaran juriya na lalata (ɓangarorin masu jure lalata).
2. Matsakaicin zafin jiki na samar da injin turbine (≤700°C): Inconel 718 shine zaɓi mai inganci mai tsada tare da daidaiton injina da aikin injina.
3. Wuraren yanki mai zafi mai zafi na injin turbin gas (950-1150°C): Ɗauki simintin simintin Rene 80 daidaitaccen simintin ko CMSX-4 simintin ƙwaƙƙwaran kwatance guda ɗaya-crystal don aikin anti-creep.
4. Guji sama da ƙayyadaddun ƙima: Allunan-crystal guda ɗaya suna kawo farashi mafi girma; yi amfani da su kawai don matsayi mafi girman zafin jiki.

Tabbatarwa mai jiran aiki: Daidaitaccen ma'aunin kayan abu na ASTM, ƙimar lalata NACE da bayanan ɓarna na dogon lokaci don kowane ƙimar alloy.

3. Madaidaicin Gudanar da Simintin Zuba Jari don Turbine Blades

Daidaitaccen simintin gyare-gyare (zuba jari/batar da kakin zuma) ita ce kawai balagagge fasaha don samar da m turbine ruwan wukake tare da ciki sanyaya tashoshi. Rashin kulawar tsari zai haifar da raguwar porosity, ainihin matsuguni, da murdiya bayanin martaba.

3.1 Mabuɗin Matsaloli a cikin Simintin Zuba Jari

1. Cike bakin bakin bango: Molten superalloy yana ƙarfafawa da sauri. Ƙananan sassan iska suna yin sanyin rufewa da cikawar da ba ta cika ba.
2. Kwanciyar ƙwanƙwasa yumbu: Cikakkun muryoyin suna karya ko canzawa ƙarƙashin tasirin ƙarfe mai zafin jiki, wanda ke haifar da toshewa ko daidaita hanyoyin sanyaya.
3. Ƙunƙarar ƙarfi: Rashin daidaituwar sanyaya yana haifar da babban juzu'i mai girma da raguwar ƙarancin ciki.
4. Sarrafa tsarin hatsi: Daidaitaccen hatsi yana samuwa cikin sauƙi ba tare da ƙarfafawar jagora ba, yana rage yanayin zafi mai zafi.

3.2 Gudanar da Tsari don Simintin Siffar Kusa-Net

• Vacuum narkewa & zuba: Narke superalloys nickel a ƙarƙashin babban injin don rage abun ciki na iskar oxygen da guje wa lahani hada oxide. Yi zafi harsashi yumbura zuwa 900-1100 ° C don inganta narkakken ƙarfe.
• Ikon ƙarfafawar kwatance: Saita gradient mai sarrafawa mai sanyaya (10-50 ° C / min adadin sanyaya) don samar da hatsin ginshiƙai ko sifofin-crystal guda ɗaya, wanda ke haɓaka juriya mai zafi mai ƙarfi.
• HIP zafi isostatic latsawa: Kula da simintin gyare-gyare tare da HIP don rufe ƙananan ƙananan pores na ciki da raguwa, inganta yawan ciki da aikin gajiya.
• Kakin sinadari shrinkage diyya: Ƙimar raguwar ƙira da aka riga aka saita (kusan 1.6%-1.7% don tsayin shugabanci) don daidaita ƙanƙancewar simintin gyaran kafa da sarrafa juzu'i gabaɗaya.

3.3 Tushen Haƙuri na Jumla don Tushen Turbine

Yin juriya mara izini yana bin ka'idodin ISO 8062 da VDG P690. Don zuba jari-zuba injin turbin ruwan simintin gyare-gyare:

• Matsakaicin girman bayanin martabar Airfoil: ± 0.30 mm bayan raguwar ramuwa.
• Izinin injin ɗin da aka ba da shawarar: 0.3-1.5 mm; mafi kauri da aka tanada a kan gurɓatattun ɓangarorin ɓangarorin da gefen gefe.
• Juriyar kaurin bango na simintin gyare-gyare: ± 0.15 mm don sassan bakin bakin bango.

Tabbaci mai jiran aiki: Cikakken maki na haƙuri na VDG P690 da ainihin ƙimar izinin injin injin don nau'ikan girman ruwan wuka.

4. Bukatun simintin gyare-gyare don Tsarin Ciki na Ruwa

Wuraren injin turbine maras tushe sun dogara da tashoshi masu sanyaya na ciki don rage zafin ruwan ruwa. Ingantattun hanyoyin sanyaya kai tsaye yana ƙayyade ingancin thermal na turbine, kuma masana'antar masana'anta ta yanke shawarar ko za'a iya ƙirƙirar tsarin ciki gaba ɗaya.

4.1 Tsare-tsare na Tashoshin sanyaya na gama-gari & Iyakokin Masana'antu

Tsarukan sanyaya na yau da kullun sun haɗa da tashoshi masu wucewa da yawa na maciji, manyan ramuka masu sanyaya bakin ciki, ƙunƙuntaccen tsage-tsage-gefen, da sifofin hargitsi na fil-fin.

Iyakokin simintin gyare-gyare:

• Mafi ƙarancin kauri na bango mai yuwuwa tare da ƙwararrun ƙwanƙolin yumbu da zubewa: 0.5 mm. Wannan ƙimar ya dogara da girman ruwa da nau'in gami.
• Matsakaicin girman girman girman mahimmanci: 0.5 mm diamita don ƙananan ramin ramin fim mai sanyaya; Siraran da suka wuce gona da iri za su karye yayin zubawa.
• Wuraren kunkuntar tsagawa suna buƙatar babban ƙarfi na asali da ƙananan haɓakar zafi don hana nakasawa ƙarƙashin babban zafin jiki.

4.2 Mahimmin Ƙirƙirar Ƙarfafawa & Matakan Yaƙin Karyewa

Gilashin yumbu na tushen Alumina shine zaɓi na yau da kullun don simintin saka hannun jari na injin turbin. Abubuwan buƙatun aiki na asali:

1. Babban refractoriness: Tsaya yanayin zafi sama da 1500 ° C ba tare da laushi ba yayin zubar gami.
2. Low thermal fadada coefficient (a ƙasa 4 × 10⁻⁶/K) don guje wa fashewar zafin zafi da juzu'i mai girma.
3. Matsakaicin ƙarfin sassauƙa (> 15 MPa) da kyawu mai kyau don kawar da sinadarai bayan simintin.

Mabuɗin maganin karaya:

• Ƙara haƙarƙari masu goyan baya akan sassa masu tsayi da bakin ciki don tsayayya da tasirin ƙarfe.
• Daidaita madaidaicin faɗaɗawar thermal tsakanin yumbura core da superalloy don gujewa faɗuwar faɗuwar zafin zafi.
• Sarrafa ɓangarorin ɓacin rai a ƙasa da 5% don kiyaye daidaiton girman tashar ciki.

5. Matsakaicin Haƙurin Machining & Tsarin Gudanarwa

Ko kusa-net-siffar saka hannun jarin simintin gyare-gyare na buƙatar 5-axis CNC mashin daidaitaccen mashin ɗin don saduwa da bayanan martaba da buƙatun haƙuri. Superalloy machining yana fama da tsananin aiki, wanda dole ne a sarrafa shi tare da ingantattun sigogin yanke.

5.1 Bukatun Haƙuri na Girma don Maɓalli na Maɓalli

1. Fuskar iska mai lankwasa: GD & T Haƙurin bayanin martaba ± 0.02 ~ 0.05 mm; Rarraba saman Ra 0.8-1.6 μm don rage asarar gogayya ta iska.
2. Tushen itacen fir: Haƙuri da juzu'i na ƙasa ± 0.015 mm; Ƙarshen saman Ra 0.2-0.8 μm don guje wa gajiyar lamba a ƙarƙashin nauyin hawan keke.
3. Platform sealing surface: Haƙuri mai laushi a cikin 0.02 mm; m kula da flatness yana hana zub da jini tsakanin layuka na ruwa.
4. Ramin fim ɗin sanyaya: Matsayin haƙuri ± 0.03 mm; Haƙurin ramin diamita ± 0.02 mm, galibi ana sarrafa shi ta hanyar injin fitarwa na lantarki na EDM.

5.2 Hanyar Injin & Zaɓin Kayan aiki

Daidaitaccen aikin sarrafa kayan aiki don simintin turbine:

1. Maganin simintin simintin gyare-gyare: Cire Shell, leaching na asali, fashewar fashewar, da ƙyalli na HIP.
2. M inji: Cire mafi yawan izinin yin simintin gyare-gyare tare da masu yankan carbide mai rufi, ajiye 0.2-0.4 mm gefen ƙarshen ƙarshen.
3. Semi-karewa: 5-axis haɗin gwiwa milling na airfoil lankwasa saman, sarrafa nakasawa machining lalacewa ta hanyar yankan zafi.
4. Ƙarshe: Niƙa mai sauri ko niƙa don cimma juriyar bayanin martaba na ƙarshe da rashin ƙarfi.
5. Machining na biyu: EDM ramukan ramukan sanyaya fina-finai akan gefuna da ke jagorantar ruwa.

Nasihu na injina don superalloys:

• Yi amfani da ƙananan saurin yanke don rage ƙarfin aiki; ci gaba da ciyar da abinci da kyau sosai don yanke ta cikin tauraren saman.
• Guji maimaita wucewa mara tushe wanda ke goge fata mai taurin gaske kuma yana hanzarta lalacewa na kayan aiki.

5.3 Ikon Ba da izini don Rage Ƙimar Scrap

Ba za a iya kaucewa nakasar simintin gyare-gyare ba, don haka dole ne a yi la'akari da iznin yin injin da bai dace ba lokacin saita girman komai:

• Haɓaka izinin injina da 0.3-0.5 mm akan titin ruwa, gefen baya da wuraren sirara mai bango tare da nakasar ƙanƙara.
• Yi amfani da sikanin shuɗi-haske na 3D don auna ainihin nakasar simintin gyare-gyare kafin yin inji, sannan daidaita shirin CNC don rama juzu'i na yanki.

6. NDT & Ka'idodin Binciken Inganci don Cast Turbine Blades

Cikakken tsarin dubawa ya ƙunshi tabbatar da kayan, ma'aunin ƙira, gwaji mara lalacewa, da duba ingancin saman ƙasa, wanda ya zama tilas ga sassa masu juriya masu zafi da ake amfani da su a injin injin gas.

6.1 Gwajin marasa lalacewa (NDT) Abubuwan

1. Gwajin Radiyo (Binciken RT/X-ray)100% dubawa don gano ciki shrinkage porosity, inclusions da sanyi rufe lahani a cikin ruwa airfoil da tushen.
2. Gwajin Ultrasonic (UT): Bincika sassan tushen ruwan wuka mai kauri don zurfin ciki wanda X-ray ba zai iya tantancewa ba.
3. Gwajin Penetrant (PT): Bincika duk saman ruwa don ƙananan fashe-fashe, musamman a kan gefuna na iska da fillet ɗin tushen ruwa.
4. Masana'antu CT scanning: Tabbatar da amincin wuraren sanyaya na ciki, gano ragowar abubuwan da aka toshe da kuma toshe ramukan sanyaya fim waɗanda wasu hanyoyin NDT ba za su iya gani ba.

Tabbaci mai jiran aiki: Matsayin NADCAP aerospace NDT da makin karɓa na lahani don simintin tukwane.

6.2 Girma & Binciken Sama

• CMM (Ma'aunin Ma'auni): Cikakken ma'auni na 3D na bayanin martabar iska, girman tushen ruwa da matsayi na ramin fim tare da daidaiton ma'auni har zuwa ± 0.002 mm.
• Binciken Laser na gani: Kwatanta ainihin siffar ruwa tare da ƙirar CAD don ƙididdige juzu'in bayanin martaba gaba ɗaya.
• Gwajin rashin ƙarfi na saman: Tabbatar da ƙimar Ra akan foil ɗin iska, tushe da saman rufewa.
• Metallurgical dubawa: Bincika tsarin hatsi don tabbatar da ingancin hatsi mai daidaita/daidaitacce / crystal guda ɗaya.

7. Tambayoyin da ake yawan yi

Q1: Shin na'ura mai daidaitawa na yau da kullun na iya maye gurbin ruwan wukake-crystal don sabis na HPHT?
A: A'a. Equiaxed superalloys suna da iyakoki na hatsi waɗanda suka zama maki masu rauni a ƙarƙashin babban zafin jiki da kaya na dogon lokaci. Single-crystal CMSX-4 yana kawar da iyakoki na hatsi kuma yana kiyaye kwanciyar hankali sama da 1000 ° C, wanda ba zai iya maye gurbinsa ba don ɓangarori masu zafi na matakin farko.

Q2: Menene ƙaramin kauri na bango wanda za'a iya jefawa don sanyaya ruwan wukake na tashar turbine?
A: Tare da babban-tsarki alumina yumbu murjani da kuma zubar da ruwa, mafi ƙarancin kaurin bangon simintin aiki shine 0.5 mm. Wannan iyaka ya bambanta da nau'ikan lissafi na ruwa da zaɓin gami. Ganuwar bakin ciki za ta haifar da cikawar da ba ta cika ba da kuma yawan tarkace.

Q3: Nawa ne izinin machining ya kamata a tanada don saka hannun jari ba komai?
A: Madaidaicin izini ɗaya shine 0.3-1.5 mm. Ƙara izni da 0.3-0.5 mm akan wuraren da ke da manyan nakasar simintin gyare-gyare kamar su tukwici da gefuna don guje wa ƙarancin kayan gida yayin aikin injiniya.

Q4: Wace hanyar dubawa zata iya gano toshewar hanyoyin sanyaya na ciki?
A: Na'urar CT na masana'antu ita ce hanya mafi aminci don bincika toshewar tashar sanyaya ta ciki, ragowar jigo da kaurin bango mara daidaituwa ba tare da lalata simintin gyaran kafa ba. X-ray ba zai iya gano manyan toshewar ba, yayin da ƙananan abubuwan da suka rage kawai za a iya gano su ta hanyar CT scanning.

8. Kammalawa & Matakai na Gaba

Ƙirƙirar ƙwararrun injin turbine yana buƙatar daidaitawar sarrafa zaɓin kayan, simintin gyare-gyare na yau da kullun, gyare-gyaren gyare-gyaren gyare-gyare, gyare-gyare na 5-axis da cikakken binciken NDT.

1. Daidaita makin superalloy tsantsa tare da zafin aiki da kafofin watsa labarai masu lalata; zaɓi Inconel 718/625 don matsakaita-zazzabi mahalli masu lalata, da gami da kwatance/crystal alloys don yanayin HPHT mai zafi.
2. Ɗauki simintin saka hannun jari tare da ƙarfafa jagoranci da jiyya na HIP don rage ƙazanta na ciki da nakasar simintin gyaran kafa.
3. Ƙirƙirar muryoyin yumbu tare da ƙarancin haɓakar zafi da isasshen ƙarfi don guje wa karyewar asali da kuma tabbatar da cikakken samar da tashoshi masu sanyaya ciki.
4. Ajiye madaidaicin izinin inji bisa ga nakasar simintin gyaran kafa; yi amfani da 5-axis CNC da EDM don sarrafa haƙurin bayanin martaba da sanyaya daidaitattun ramukan fim.
5. Aiwatar da cikakken RT, UT, PT da CT gwajin mara lalacewa tare da duba girman CMM don tabbatar da ingancin ruwa.

Idan kuna da zane-zane na 2D/3D na injin turbine kuma kuna buƙatar kimanta kayan aiki, tsarin aiwatar da simintin gyare-gyare, nazarin juriya na injina ko ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun injin turbin, zaku iya ƙaddamar da ƙayyadaddun ƙayyadaddun fasahar ku don cikakken nazarin injiniyanci.