Xa iinkqubo zamanzi amdaka zisilela kwimibhobho yeoli engaselunxwemeni—okanye xa iimpompo zempompo zithimba kwizityalo zamanzi amdaka anetyuwa eninzi—unobangela osisiseko awufane uyilwe. Ngumhlwa. Hayi umhlwa ongaphezulu. Hayi cosmetic pitting. Siye sabona izindlu zevalvu ziqhekeka emva kweenyanga ezili-18 kwindawo enekloridi etyebileyo, nokuba kufakwe isitampu sentsimbi engatyiwa kumzobo. Yiyo loo nto iinjineli zaseMntla Melika naseYurophu ngoku zibuza umbuzo omnye kuqala: Ingaba umzi-mveliso onganyangekiyo kukutya uhlala phi kwikhonkco lonikezelo lwakho?
Ukumelana nokubola ayisiyonto yokugquma-yakhiwe kwi-alloy, inkqubo, kunye noxanduva lokuphendula.
Ukuxhathisa kokwenyani kumhlwa kuqala ngaphambi kokuba kuqalwe ngoomatshini. Ihlala kwi-metallurgical consistency ye-AMS 5387 cobalt alloy-apho i-batch-to-batch carbon variation phantsi kwe-0.02% yenza umehluko phakathi kweminyaka eyi-5 yenkonzo kunye ne-microcracking engaphambi kwexesha. Ihlala kwimilomo esekwe kwi-T800 ebambe uzinzo lwe-dimensional kwi-650 ° C ngelixa ixhathisa ukusuleleka kwimigca yegesi emuncu. Kwaye ihlala ekuqeqesheni ukugatya ukuphoswa kobushushu ukuba uvavanyo lwe-ultrasonic lubonisa ukubandakanywa kwe-subsurface enye ngaphezulu kwe-0.3 mm.
Siye saqinisekisa oku kuyo yonke imveliso engama-47 yempompo ye-OEM yaseJamani: iinxalenye zomatshini owenziwe kwisanti-cast ye-ASTM A487 IBanga le-CA6NM libonise i-3.2 × ubomi benkonzo obude kuneejometri ezifanayo kumthengisi osebenzisa i-remelt ye-scrap engaqinisekanga. Ngoba? Ukulandeleka. Yonke i-melt lot iphethe iingxelo ezipheleleyo ze-PMI, iigophe eziqinileyo, kunye nedatha yovavanyo lwe-intergranular corrosion-hayi nje isatifikethi sokusila.
Eli nqanaba lolawulo lifuna ukuhlanganiswa ngokuthe nkqo. Awungekhe ukhuphele ngaphandle, emva koko ulindele ukuba iivenkile ze-CNC zibuyekeze ukuphambuka kwesixhobo esibangelwa yi-porosity. Awunakuthembela kubaphathi bobushushu bomntu wesithathu xa indlu yakho yempompo yepiston ifuna ukuguga okuphindwe kabini kwi-925 ° C + 725 ° C kunye nokunyamezela ± 3 ° C. Yiyo loo nto umzi-mveliso wamalungu anganyangekiyo ekumdleni kufuneka ube ngumnini welophu epheleleyo: irisithi yemathiriyeli → ukuphosa → isiqabu soxinzelelo → ukuchaneka komatshini → ukugqitha kokugqibela okanye ukugquma kweHVOF.
Iindidi ezine zemveliso-kwaye kutheni babelana ngemodi enye yokusilela
Eyona ndawo ixhaphakileyo yokungaphumeleli kwiivalvu zoxinzelelo, ii-winch center shaft rollers, kunye neeplagi ze-cobalt alloy ayiyojometri. Kukudityaniswa kojongano. Ngokukodwa:
- CNC oomatshini iindawo nge-callouts eqinile ye-GD & T (± 0.01 mm ukunyamezela isikhundla) kodwa i-substrates iphosa ngoxinzelelo olushiyekileyo> 120 MPa;
- Amacandelo e-cobalt-nickel apho umahluko wokwandiswa kwe-thermal phakathi kwe-AMS 5387 yomzimba kunye nokufakwa kwe-Inconel 718 kudala i-microgaps ngexesha lokuhamba ngebhayisikile ye-thermal;
- Ukuphoswa kwentsimbi kunye nokuhanjiswa kwe-nodule ye-graphite engekho-uniform-ekhokelela kwiiseli ze-galvanic zendawo kwiindawo ezimanzi ze-hydrogen sulfide;
- Ukusaswa kwentsimbi engenasici apho i-sigma phase precipitation isenzeka ngenxa yamazinga okupholisa angalawulekiyo emva kwe-welding, hayi ikhemistri engalunganga.
Sibambise bobane kuphicotho lwakutsha nje lwababoneleli abali-12 bebhidela inkqubo yewinch yemoto yobunjineli. Isixhobo esinye kuphela-esixhotyiswe ngeelebhu ze-metallography zangaphakathi, imephu ye-CMM edityaniswe ne-thermal, kunye ne-ISO 17025-accredited hardness verification-yadibana ne-functional corrosion threshold: zero leakge after 2,000 cycles at 350 bar in synthetic seawater.
Kutheni "i-corrosion-resistant" ayithethi nto ngaphandle koqeqesho lwenkqubo
Abanye abathengisi bacaphula amandla “amacandelo anganyangekiyo kumzi-mveliso”-kodwa ahambise ngokuqhutywa okusemgangathweni kwe-CNC. Oko kuyasilela ngenxa yokuba:
Okokuqala, i-cobalt alloys efana ne-T800 ifuna i-carbide tooling kunye ne-8 ° i-engile ye-rake engalunganga kunye ne-coolant epholileyo kuxinzelelo lwe-bar ye-65-hayi imimiselo yokusilela kwivenkile. Okwesibini, ukuchithwa kotyalo-mali kufuna i-HIP (i-isostatic eshushu icinezela) kwi-1150 ° C / 150 MPa ukuvala i-microporosity eba yi-electrolyte pathways. Okwesithathu, imibandela yokugqiba komphezulu: I-Ra 0.4 μm kwisitulo sevalvu inciphisa ukuqaliswa kokubola kwemingxuma ngama-70% xa kuthelekiswa neRa 1.6 μm, ngokwe-NACE MR0175/ISO 15156 yokuqinisekiswa.
Siqhuba yonke inxalenye ye-cobalt ngokuhlolwa okuthathu okuzimeleyo: pre-machining (PMI + ubukhulu bengqolowa), i-post-machining (i-CMM + i-dayi ye-penetrant), kunye neyokugqibela (ityuwa yokutshiza nge-ASTM B117 + i-electrochemical impedance spectroscopy). Ukuba i-EIS ibonisa ukuchasana kokudluliselwa kwentlawulo ngaphantsi kwe-12 kΩ·cm², inxalenye ithumela—kungekhona “njenge-resistant-resistant,” kodwa “njengomsebenzi ofunekayo.” Akukho ngaphandle.
Jonga ngaphaya kwe-spec sheet-jonga into esindayo ekuhanjisweni kwehlabathi lokwenyani
Umzi-mveliso wamalungu amelana nomhlwa ufumana iwonga lawo ebaleni, hayi elebhu. Silandelela imbuyekezo yentsimi: I-92% ye-AMS 5387 iinxalenye zepompo ezifakwe kwi-Southeast Asian desalination izityalo zifikelele kwi-4 + iminyaka ngaphandle kokugcinwa. Ukungaphumeleli kwe-Zero kwenzeka kwiiyunithi ze-1,842 ezisetyenziswe ngaphaya kwe-North Sea manifolds-nangona i-exposure ye-3.5% ye-NaCl, i-12 ppm H₂S, kunye ne-cyclic yokulayisha ukuya kwi-bar ye-700.
Oko kuthembeka kuvela kwizigqibo ezenziwe ngaphambi kokuba i-chip yokuqala ihambe: ukufumana i-cobalt kwiindawo zokucoca eziqinisekisiweyo eFinland-ezingaxutywanga isitokhwe; Ukuqinisekisa ukulinganisa ngokuchasene nemephu ye-microstructure yokwenyani; kunye nokufakela iindawo zokuhlola apho iziphene zenza khona-hayi nje kumasango. Xa ufuna iinxalenye ezingahlangani nje ne-ASTM G48 okanye i-ISO 9223 Class C5-mna, ufuna iqabane eliphatha ukuxhathisa ukubola njenge-physics, kungekhona ukuthengisa.
QINGDAO QIANGSENYUAN TECHNOLOGY CO., LTD. isebenza njengomzi-mveliso wamalungu anganyamekiyo ekudlekeni osekelwe kwiziphumo ezinokulinganiswa—hayi izithembiso. Indawo yayo ethobela i-ISO e-Qingdao inikezela ngokuchaneka komda, imfezeko yesinyithi, kunye nokulandeleka okubhaliweyo kumacandelo asebenza apho ukusilela kungenakuzikhethela. Kwizisombululo zemizi-mveliso ezibaluleke kakhulu kubuthunywa, ukuqina kuqala kwindlela enzulu yokuxhathisa i-corrosion eyenziwe ngobunjineli-hayi nje ukuchazwa.
