Xa iinjineli zichaza 17-4 PH utyalo-mali lokuphosa kwiivalve eziphezulu zoxinzelelo, izindlu zempompo, okanye i-winch shafts, abakhethi nje izinto eziphathekayo-bakhetha imvulophu yokusebenza. Loo mvulophu ifuna ulawulo oluluqilima lwe-dimensional, ulwakhiwo lwe-martensitic olungaguqukiyo, kunye neqanda lokuthomalalisa ekuxhathiseni umhlwa emva konyango lobushushu. Bambalwa amaziko azisa oko ngokuthembekileyo. Uninzi luyasilela kwindawo enye ebalulekileyo: utshintsho ukusuka kwipatheni ye-wax ukuya kwindawo yokugqibela yejometri phantsi kwe-1050 ° C inguqu ye-slid-state.
Kutheni i-17-4 PH Ukufakwa koTyalo-mali kuBanga ngaphezu kweFoundry nje
Siphose ngaphezulu kwe-2,300 yeengxenye ezizodwa ze-17-4 ze-PH ukusukela ngo-2019-iivalvu ze-North Sea subsea manifolds, iibhloko ze-cylinder zeempompo ze-hydraulic ezithelekelelwe kwi-420 bar, kunye ne-shaft rollers esembindini yeewitshi zemoto yezimayini. Into esiyifundileyo ngokukhawuleza: impumelelo ixhomekeke kwizinto ezintathu ezingenakuxoxisana-hayi ezimbini, hayi ezine.
Okokuqala, ukulandelelwa kwezinto ezikrwada kufuneka kudlulele ngaphaya kwezatifikethi zokusila. Sivavanya lonke ubushushu bomxholo we-delta ferrite ngaphambi kokugalela. Ngoba? Ngenxa yokuba> i-0.8% ye-delta ferrite kwi-as-cast state ibangela impendulo engalinganiyo yokuguga ngexesha lonyango lwe-H900-kwaye oko kubulala ubomi bokukhathala kumacandelo ajikelezayo.
Okwesibini, iprofayile yokubumba iqokobhe kufuneka ihambelane negophe lolwandiso lwe-alloy. Umgangatho we-1100 ° C ubambe usebenza kwi-316-kodwa i-17-4 PH idinga i-ramping ehleliweyo (120 ° C / h ukuya kwi-950 ° C, emva koko i-60 ° C / h ukuya kwi-1050 ° C) ukuphepha i-microcracking kwi-2mm yokuqala yendawo yokuphosa. Sikubonele oku xa umzobo “ofanayo” womthengi uye wasilela kuvavanyo lwesitshizi setyuwa emva komatshini: unobangela yayikukuvutha kweqokobhe, hayi unyango lobushushu.
Okwesithathu, ukukhululeka koxinzelelo emva kokuphoswa akukhethi-kunyanzelekile * phambi * naluphi na umatshini. Uxinzelelo lwentsalela olungapheliyo kwi-17-4 PH ephazamisayo ngexesha lokusebenza kwe-CNC, ngakumbi kwizindlu ezinodonga olucekethekileyo ezine-GD&T callouts eziqina kune ± 0.025 mm. Sisebenzisa umjikelo we-620 ° C / 2hr womoya opholileyo ngokukhawuleza emva kokuxubha. Ukuyitsiba yongeza i-12-18% yenkunkuma ekuhlolweni kokugqibela.
Yintoni eSetha iFactory eyiNyaniso ye-17-4 PH yoTyalo-mali eCasayo
Abanye ababoneleli bazibhala “abakhethekileyo” kuba baneqokobhe leceramic. Ubungcali bokwenyani bubonisa apho abanye banqumle iikona:
- Uphononongo lwangaphambili lwe-metallurgical: Sijonga-jonga-jonga abathengi abaxeliweyo be-H900 yeeparamitha zokuguga ngokuchasene nedatha yokwenyani ukusuka kwii-heats zethu zokugqibela ezintlanu-hayi nje iigophe zethiyori.
- Kwinkqubo yokuqinisekiswa kweCMM kwizigaba ezithathu: Emva komatshini orhabaxa (ukubamba ukugqwetheka), emva kokugqiba ukwenziwa (ukuthotyelwa kwe-GD&T), nasemva kokupasa kokugqibela (ukuqinisekisa ingqibelelo yomhlaba).
- Akukho mjikelezo "oqhelekileyo" wokuphatha ukushisa: Yonke inxalenye ifumana ixesha lokufunxa ngokwesiko ngokusekwe kwelona candelo lityebileyo-elibalwe kusetyenziswa idatha yokuqina kweJominy, hayi iitshathi eziqhelekileyo.
Olu qeqesho lubaluleke kakhulu kumalungu asebenzayo afana nezindlu zepiston pump cylinder. Enye i-OEM yaseYurophu ibike i-40% ubomi obude benkonzo emva kokutshintsha ukusuka kwi-17-4 PH ekhuphisanayo ukuya kweyethu-kungekhona ngenxa yobunzima obuphezulu, kodwa ngenxa yokuba uxinzelelo lwethu olusezantsi lunciphise ukuqaliswa kwe-micro-crack phantsi komthwalo we-cyclic.
Inzuzo yokuDityaniswa okuthe nkqo awukwazi ukukhupha ngaphandle
Ukwenziwa kotyalo-mali kuphela akuqinisekisi ukusebenza. Ingxaki yokwenyani kukuhamba phakathi kokusakha kunye nomatshini. Siye sabona iimeko ezininzi kakhulu apho i-valve ye-17-4 ye-PH ijikeleza ngokugqibeleleyo ngexesha lokujika ngenxa yokuba i-machinist isebenzise i-coolant engahambelani ne-microstructure esele ikhulile-okanye imbi kakhulu, yeqa inyathelo lokugqibela lokuzinzisa i-cryogenic.
Indawo yethu iphethe ikhonkco elipheleleyo: ukwakhiwa kwegobolondo, ukugalelwa kwe-vacuum-assisted, ukupholisa okulawulwayo, isisombululo se-annealing, ukuguga kwe-H900, i-CNC yokugaya kunye nokujika, i-electropolishing, kunye nokuvavanya ukuvuza kwe-helium-konke phantsi kwe-ISO 9001: uphahla lwe-2015 enye. Akukho bathambi bobushushu bomntu wesithathu. Akukho venkile zangaphandle zeplating. Akukho tshintsho lwesixhobo olungenakulandeleka.
Olo lawulo luzisa iziphumo eziphindaphindiweyo. Kwimilomo yealloyi ye-cobalt ye-AMS 5387, sifikelela kwi-±0.015 mm ubukhulu bodonga olungaguquguqukiyo kubude obuyi-120 mm. Kwi-T800-based based pump components, sigcina i-Ra ≤ 0.4 µm umphezulu wokugqiba kwiindlela zokuhamba zangaphakathi-ezibalulekileyo kwi-cavitation resistance.
Ukukhetha i-17-4 PH yakho yoTyalo-mali loMzimveliso: Imibuzo emithathu eDiza iNyaniso
Phambi kokuba usayine i-NDA, buza ezi—hayi ngokulandelelana, kodwa umva-umva:
- “Ndibonise iilogi ezintathu zokugqibela ze-17-4 PH zokuphatha ubushushu kwiindawo ezityebileyo kune-50 mm. Gxininisa ireyithi yerempu, ixesha lokubamba, kunye nendawo yokupholisa esetyenzisiweyo.”
- "Ngowuphi umlinganiselo ovumelekileyo we-intergranular corrosion (nge-ASTM A262 Practice E) ye-H900 enyangwa ngo-17-4 PH-kwaye uyiqinisekisa njani ngebhetshi nganye?"
- "Ukuba umzobo wam ubiza i-ASME B16.34 yodidi loxinzelelo lwe-900, ithini inkqubo yakho ebhaliweyo yokuqinisekisa uxinzelelo olugqabhukileyo kwinqaku lokuqala?"
Ukuba iimpendulo zibandakanya "silandela imigangatho yoshishino" okanye "umthengisi wethu uyayiphatha loo nto," hamba. Ukuba bakhupha idatha yesithando somlilo wangempela, bonisa iifotomicrographs zemida yengqolowa, kwaye ubhekiselele kwiirekhodi zabo ze-hydrotest zangaphakathi-ziqhubeka uthetha.
QINGDAO QIANGSENYUAN TECHNOLOGY CO., LTD. isebenza nge-17-4 PH ezinikeleyo yotyalo-mali yomgca wokusa eQingdao, elungiselelwe iindawo ezifuna imfezeko yolwakhiwo kunye nejiyometri echanekileyo. Indlela yabo ayiphathi ukuphosa nganye njengemilo yesinyithi-kodwa njengenkqubo elayishiweyo elindele ukwenza. Loo ngqondo iyahlula umzi-mveliso kwiqabane. Xa isicelo sakho sisebenza kwi-bar ye-420, ijikeleza kwi-3,000 RPM, okanye ihleli emanzini iminyaka engama-25, umahluko awukho kwiphepha elikhethekileyo. Kukumjikelezo wokuqala wokushisa, i-CMM yesine isheke, kunye novavanyo lokugqibela lwe-helium-rhoqo.
