Izixazululo zefekthri yensimbi engagqwali i-Austenitic kumele zilethe okungaphezu nje kokuthobela izinto ezibonakalayo—kufanele ziqinisekise ukumelana nokugqwala okusinda kusevisi yomhlaba wangempela: ukuchayeka kwe-chloride ephezulu kuma-hydraulics angasogwini, ukuhamba ngebhayisikili okushisayo ezindaweni zokuphamba, noma ukuthintana okunodaka olubi kumasistimu ewintshi yemoto yobunjiniyela. Kwa-QINGDAO QIANGSENYUAN TECHNOLOGY CO., LTD., senze ngomshini izingxenye zensimbi engagqwali ezingaphezu kuka-12,000 zamavalvu okucindezela nephampu yepiston kusukela ngo-2019—futhi konke ukuhlaziya ukwehluleka kusifundisa into eyodwa: ukumelana nokugqwala akubhakwa ebangeni. Yenzelwe ukulawula inqubo.
Ukumelana Nokugqwala Kuqala Ngaphambi Komshini—Hhayi Ngemva
Abathengi abaningi bacabanga ukuthi i-ASTM A351 CF8M noma i-UNS S31603 ilingana ngokuzenzakalela “nobufakazi bokugqwala.” Abalungile. Siye sabona ukulingwa okufanayo kwehluleka ezindaweni ezifanayo zamanzi olwandle—okukodwa kudlule ukuhlolwa kwesifutho sikasawoti samahora angu-2,000; omunye ugobe phakathi namahora angama-72. Imbangela? Hhayi ukuchezuka kwekhemikhali—kodwa ukuqina okungahambisani ngesikhathi sokukhishwa kwesihlabathi. I-microsegregation yasendaweni idale izindawo ezincishwe i-chromium eduze kwemingcele ye-interdendritic. Ukulungiswa bekungahlolisiswa futhi. Yayidizayina kabusha isistimu yokufaka isango, yengeza amapuleti aqondisayo, futhi ibambe izinga lokushisa eliwuketshezi lensimbi phakathi kuka-±5°C phakathi nokuthela. Sibamba kanjalo inombolo ye-ferrite phakathi kuka-5–8 FN kukho konke ukusakaza kwe-CF8M—okuqinisekiswa ngokuhlolwa kazibuthe *ngaphambi* kokwelashwa kokushisa, hhayi ngemva kwalokho.
Asikhiphi i-metallurgy. Amalogi ethu ezinto ezingavuthiwe alandelela ukushisa ngakunye emibikweni yokuhlolwa kokugaya (ama-MTR) abonisa okuqukethwe kwangempela kwe-Cr, i-Mo, i-Ni, ne-N—hhayi nje “okuhlangana ne-spec.” Ngezinhlelo zokusebenza ezibucayi njengezingxenye zephampu ye-cobalt ye-AMS 5387 ye-cobalt alloy esebenza eduze kwezindlu ze-austenitic, siqinisekisa ukuhambisana kwe-galvanic ngokusebenzisa izilinganiso ezingase zibe khona ze-open-circuit kuma-electrolyte esevisi alingisa. Uma umehluko ongaba khona udlula u-50 mV, silungisa amapharamitha wokudlula endaweni—ngisho noma i-base alloy “ilungile.”
Lapho Izimangalo Eziningi Ze-Austenitic Stainless Stainless Factory Ziphuka Khona
Abanye abahlinzeki babiza kakhulu izinsiza “eziqinisekiswe i-ISO” ngenkathi besebenzisa ama-caliper aphathwayo ukuze bahlolwe okokugcina amajenali we-shaft tolerance 0.005 mm. Asazi. Yonke ingxenye yensimbi engagqwali ye-austenitic eshiya indawo yethu ye-Qingdao ihlolwa okuthathu okungaxoxiswana ngakho:
- Ukuqinisekiswa kobuqotho obuphezulu: I-interferometry yokukhanya okumhlophe ebusweni obuvalekayo, hhayi nje amanani ama-rough (Ra)—ngoba indawo ebushelelezi eklebhuka ngaphansi komhlaba imema ukugqwala
- Ukuqinisekiswa kwesendlalelo esingenzi lutho: I-Electrochemical impedance spectroscopy (EIS), hhayi nje ukuhlola idiphu ye-nitric acid—ngakho sikala ukujiya kwe-oxide nokuminyana kwesici, hhayi nje ukushintsha kombala
- Imephu yokucindezeleka eyinsalela: I-X-ray diffraction ezindaweni ezibucayi ezi-5 ingxenye ngayinye, ikakhulukazi eduze nezibopho nemicu—njengoba ukucindezeleka okuqinile okungaphezu kuka-200 MPa kusheshisa i-SCC ezindaweni ze-chloride
I-OEM eyodwa ye-hydraulic yaseYurophu yenqabe ukuthunyelwa kwethu kokuqala kwesisekelo sephampu ye-S31603—hhayi ngenxa yephutha le-dimensional, kodwa ngenxa ye-spikes eyinsalela yokucindezeleka eduze nezimbobo ezikhuphukayo. Siphendule ngamamephu engcindezi agcwele, sase siklama kabusha i-clamping fixture futhi sengeza ukuguga okudambisa ingcindezi ngaphambi komshini wokugcina. Ukulethwa kwehle amasonto amabili. Impilo yokugqwala yelulwa isuka ezinyangeni eziyi-18 kuye kwezingama-47 ezivivinyweni zasensimini. Lokho kungukuhwebelana ngaphandle kwemibukiso yedatha.
Ukusebenza Komhlaba Wangempela Kudinga Ukuqedwa Komhlaba Wangempela
Amamaki omshini abalulekile. Ukuqedwa okungu-0.8 µm Ra kungase kuhlangabezane nemininingwane yokudweba—kodwa uma lezo zimpawu zihambisana ukuze zigeleze kumzimba wamavalvu, ziba amasayithi okuqalisa ukugqwala. Siqondisa izindlela zamathuluzi ukuze zifane nokulayisha isevisi: i-circumferential yamashafti ajikelezayo, i-axial yezindlu ezimile, kanye ne-radii ehlanganisiwe ezinguqukweni. Ezingxenyeni ezisekelwe ku-T800 ze-cobalt ezishiselwe kuma-austenitic assembles, sisebenzisa i-electropolishing *after* welding—hhayi ngaphambili—ukuze sisuse ama-zone oxides athinteke ukushisa ngaphandle kokusika uzwane olushiselayo.
Ukuthuthukiswa kwethu okucelwe kakhulu? I-passivation nge-citric acid + sodium nitrate esikhundleni se-nitric acid yendabuko. Kungani? Ngoba i-citric acid isusa insimbi yamahhala ngaphandle kokuncibilikisa i-chromium—okubalulekile uma kwenziwa izingxenye eziyingxube ze-duplex-austenitic. Siqinisekisa imiphumela ngokuhlolwa kwe-copper sulfate *kanye* nesisombululo senkomba ye-ferroxyl, sibheka kokubili ukuhlanzeka kwendawo kanye nokufana kwefilimu engenzi lutho. Amakhasimende abika ukwehluleka kwenkundla okungu-3.2× okumbalwa ekufakweni kogu ngemva kokushintsha.
Ukukhetha i-Austenitic Stainless Steel Factory Kusho Ukukhetha Uzakwethu Wenqubo
Uma uhlelo lwakho lokusebenza lubandakanya ingcindezi yomjikelezo, izinga lokushisa eliphakanyisiwe, noma ukuthintana okuxubile, ibanga lempahla liyisinyathelo sokuqala kuphela. Isinyathelo sesibili siwukuqinisekisa ukuthi umphakeli ulawula kanjani ukuhlukaniswa, ingcindezi, nesimo sendawo kuwo wonke amaqoqo. Isinyathelo sesithathu siqinisekisa ukuthi i-QA yabo ayimi ekuhambisaneni kwe-dimensional-ikala ukuziphatha kwe-electrochemical, i-microstructural homogeneity, nokuphila isikhathi eside kokusebenza.
QINGDAO QIANGSENYUAN TECHNOLOGY CO., LTD. isebenza njengesandiso sethimba lakho lonjiniyela—hhayi umthengisi wezingxenye. Sibuyekeza ngokubambisana ama-callouts e-GD&T ngomthelela wokwenziwa ekuphikeleni ukugqwala. Sihlaba umkhosi izithandani ezingase zibe ne-galvanic ngaphambi kokuthi kuqale ukulingisa. Sigcina ukulandeleka okugcwele kwempahla kuze kufike kunombolo yeladle kanye nelogi yomjikelezo wokuphatha ukushisa. Futhi uma ukugqwala kuvela kusevisi, asithumeli okunye esikhundleni—sithumela umbiko wembangela onezingxenye ezihlukene zensimbi kanye nezinqubo zokulungisa.
Ukumelana nokugqwala okuthembekile akuqinisekiswa ngokuqokwa kwebanga. Itholwe endaweni eyisisekelo, yafakazelwa elebhu, futhi yaqinisekiswa ensimini. Yilokho okujwayelekile yonke imboni ye-austenitic yensimbi engagqwali okufanele ihlangabezane nayo—kodwa abambalwa abakwenzayo empeleni.
