Amapayipi ensimbi engagqwali anodonga oluqinile anezinzuzo eziningi, njengokumelana ne-oxidation ephezulu lokushisa, ukumelana nokugqwala okuqinile, ipulasitiki enhle, ukusebenza kahle kakhulu kokushisela, njll., futhi asetshenziswa kabanzi emikhakheni ehlukahlukene yezimboni zomphakathi. Kodwa-ke, ngenxa yokuqina okuphansi nokumelana nokugqokwa okuphansi kwensimbi engagqwali, ukusetshenziswa kwayo ezikhathini eziningi kuzonqunyelwa, ikakhulukazi endaweni lapho izici eziningi ezifana nokugqwala, ukuguga, nomthwalo osindayo zikhona futhi zithintana, impilo yesevisi izinto zensimbi engagqwali zizofinyezwa kakhulu. Ngakho-ke, kanjani ukwandisa ubulukhuni ebusweni bamapayipi ensimbi engagqwali aminyene?

Manje kunendlela yokwandisa ubulukhuni bobuso bamapayipi anezindonga eziwugqinsi nge-ion nitriding ukuze kuthuthukiswe ukumelana nokuguga futhi ngaleyo ndlela andise impilo yayo yesevisi. Kodwa-ke, amapayipi ensimbi engenasici ye-austenitic awakwazi ukuqiniswa ngokushintsha kwesigaba, futhi i-ion nitriding evamile inezinga lokushisa eliphakeme le-nitriding, elingaphezu kuka-500 ° C. I-Chromium nitrides izokwehla kusendlalelo se-nitriding, yenze i-matrix yensimbi engagqwali ibe mbi kakhulu. Nakuba ubulukhuni bobuso bukhuphuka ngokuphawulekayo, ukumelana nokugqwala kwendawo yepayipi nakho kuzoncipha kakhulu, ngaleyo ndlela kulahlekelwe izici zamapayipi ensimbi engenasici anezindonga eziwugqinsi.

Ukusetshenziswa kwemishini ye-DC pulse ion nitriding yokwelapha amapayipi ensimbi e-austenitic ane-ion nitriding enezinga lokushisa eliphansi kungathuthukisa ubulukhuni bangaphezulu bamapayipi ensimbi anezindonga eziwugqinsi kuyilapho kugcina ukumelana nokugqwala kungashintshile, ngaleyo ndlela kwandise ukumelana kwawo nokuguga. Uma kuqhathaniswa namasampula aphathwe nge-ion nitriding ezingeni lokushisa elivamile le-nitriding, ukuqhathanisa kwedatha nakho kusobala kakhulu.

Ukuhlolwa kwenziwa esithandweni somlilo esingu-30kW DC pulse ion nitriding. Imingcele ye-DC pulse power supply yi-voltage eguquguqukayo engu-0-1000V, umjikelezo womsebenzi olungisekayo 15% -85%, kanye nemvamisa engu-1kHz. Isistimu yokulinganisa izinga lokushisa ikalwa nge-infrared thermometer IT-8. Impahla yesampula iyipayipi lensimbi engenasici eliwugqinsi elingu-316, futhi ukwakheka kwayo kwamakhemikhali yi-0.06 carbon, 19.23 chromium, 11.26 nickel, 2.67 molybdenum, 1.86 manganese, kanti enye iyinsimbi. Usayizi wesampula ngu-Φ24mm×10mm. Ngaphambi kokuhlolwa, amasampula ayepholishwa nge-sandpaper yamanzi ngokushintshana ukuze asuse amabala kawoyela, bese ehlanzwa futhi omiswe ngotshwala, abese efakwa phakathi nendawo yediski ye-cathode futhi afakwe ngaphansi kuka-50Pa.

Ubulukhuni obuncane bengqimba ye-nitrided bungafinyelela ngisho nangaphezulu kuka-1150HV lapho i-ion nitriding yenziwa kumapayipi ashiselwe insimbi engagqwali ye-austenitic 316 emazingeni okushisa aphansi kanye namazinga okushisa avamile e-nitriding. Isendlalelo esine-nitrided esitholwe yi-ion nitriding enezinga lokushisa eliphansi sizacile futhi sinokuthambekela kokuqina okuphezulu. Ngemuva kokushisa okuphansi kwe-ion nitriding, ukumelana nokugqoka kwensimbi ye-austenitic kungandiswa izikhathi ezingu-4-5, futhi ukumelana nokugqwala kuhlala kungashintshi. Nakuba ukumelana nokugqokwa kungathuthukiswa izikhathi ezi-4-5 nge-ion nitriding ekushiseni okuvamile kwe-nitriding, ukumelana nokugqwala kwamapayipi anezindonga eziwugqinsi ye-austenitic kuzoncishiswa ngezinga elithile ngoba i-chromium nitride izoncipha phezulu.