Inhloso eyinhloko yokwelashwa okungaphezulu kwezingxenye ze-powder metallurgy:
1. Thuthukisa ukumelana nokugqoka
2. Thuthukisa ukumelana nokugqwala
3. Thuthukisa amandla okukhathala

Izindlela zokwelashwa ezingaphezulu ezisetshenziswa ezingxenyeni ze-powder metallurgy zingahlukaniswa ngokuyisisekelo zibe izigaba ezinhlanu ezilandelayo:
1. Ukumboza: Vala ingaphezulu lengxenye ecutshunguliwe ngongqimba lwezinye izinto ngaphandle kokusabela kwamakhemikhali
2. Ukwelashwa kwamakhemikhali angaphezulu: ukusabela kwamakhemikhali phakathi kobuso bengxenye ecutshunguliwe kanye ne-reactant yangaphandle
3. Ukwelashwa kokushisa ngamakhemikhali: ezinye izakhi ezifana no-C no-N zisakazeka ebusweni bengxenye ecutshunguliwe
4. Ukwelashwa kokushisa okungaphezulu: ukuguqulwa kwesigaba kwenziwa ukushintsha kwezinga lokushisa okujikelezayo, okushintsha i-microstructure yobuso bengxenye ecutshunguliwe.
5. Indlela ye-Mechanical deformation: ukukhiqiza ukuguquguquka komshini ebusweni bengxenye ecutshunguliwe, ikakhulukazi ukukhiqiza ukucindezeleka okusalayo okucindezelayo, kuyilapho kukhulisa ukuminyana komhlaba.

Ⅰ.Ukugqoka
I-Electroplating ingasetshenziswa ezingxenyeni ze-powder metallurgy, kodwa ingenziwa kuphela ngemva kokuba izingxenye ze-powder metallurgy sezilungisiwe (njengokucwilisa ithusi noma ukucwilisa i-wax ukuze kuvalwe izimbobo) ukuvimbela ukungena kwe-electrolyte.Ngemuva kokwelashwa kwe-electroplating, ukumelana nokugqwala kwezingxenye ngokuvamile kungathuthukiswa.Izibonelo ezijwayelekile ukucwebezela (ukusebenzisa kabusha i-chromate ukuze idlule ngemuva kokucwebezela ukuze kutholwe indawo emnyama noma ecwebezelayo eluhlaza okotshani) kanye ne-nickel plating.
I-electroless nickel plating iphakeme kune-electrolytic nickel plating kwezinye izici, njengokulawula ukujiya kokumboza nokusebenza kahle kokucwenga.
Indlela yokugqoka ye-zinc "eyomile" ayidingi ukwenziwa futhi ayidingi ukuvalwa.Ihlukaniswe yaba impushana yokufaka uthayela kanye ne-mechanical galvanizing.
Lapho i-anti-rust, i-anti-corrosion, ukubukeka okuhle kanye nokufakwa kukagesi kuyadingeka, ukudweba kungasetshenziswa.Izindlela zingabuye zihlukaniswe zibe: ukumbozwa kwepulasitiki, ukucwebezela, nokufutha ngensimbi.

Ⅱ.Ukwelashwa ngamakhemikhali angaphezulu

Ukwelashwa nge-steam kuyizinqubo ezivame kakhulu kuzo zonke izinqubo zokwelashwa ezingaphezulu kwezingxenye ze-powder metallurgy.Ukwelashwa ngesitimu ukushisa izingxenye zibe ngu-530-550°C emkhathini wesitimu ukuze kukhiqizwe ungqimba olungaphezulu lukazibuthe (Fe3O4).Ngokufakwa kwe-oxidation ebusweni be-matrix yensimbi, ukumelana nokugqoka kanye nezakhiwo zokungqubuzana kuyathuthukiswa, futhi izingxenye zimelana nokusebenza kwe-Rust (kuqiniswa ngokwengeziwe ukucwiliswa kwamafutha) Ungqimba lwe-oxide lucishe lube ngu-0.001-0.005mm, lumboze yonke indawo yangaphandle. , futhi ingasakazeka phakathi nengxenye ngokusebenzisa izimbotshana ezixhumene.Ukugcwaliswa kwalesi pore kwandisa ubulukhuni obubonakalayo, ngaleyo ndlela Thuthukisa ukumelana nokugqoka futhi wenze kube nezinga elilinganiselwe lokuhlanganisa.

Ukwelashwa kwe-cold phosphate wukusabela kwamakhemikhali kubhavu kasawoti ukwenza i-phosphate eyinkimbinkimbi ebusweni bomsebenzi.I-zinc phosphate isetshenziselwa ukwelapha kuqala izinto zokumboza kanye nezingubo zepulasitiki, kanti i-manganese phosphate isetshenziselwa ukufakwa kokungqubuzana.

I-bluing yenziwa ngokubeka i-workpiece endaweni yokugeza ye-potassium chlorate ku-150 ° C ngokugqwala kwamakhemikhali.Ingaphezulu le-workpiece inombala oluhlaza okwesibhakabhaka omnyama.Ugqinsi lwesendlalelo se-bluing cishe luyi-0.001mm.Ngemuva kokwenza i-bluing, ingaphezulu lezingxenye lihle futhi linomsebenzi wokulwa nokugqwala.

Umbala we-nitriding usebenzisa i-nitrogen emanzi njenge-oxidant.Phakathi nenqubo yokupholisa ye-workpiece ngemva kokucwiliswa, kwakheka ungqimba lwe-oxide ebangeni lokushisa lika-200-550 ° C.Umbala wesendlalelo se-oxide esakhiwe uyashintsha nezinga lokushisa lokucubungula.

Ukwelashwa kwe-anodized anti-corrosion kusetshenziselwa izingxenye ezisekelwe ku-aluminium ukuze kuthuthukiswe ukubukeka kwayo nokusebenza kwe-anti-corrosion.

Ukwelashwa kwe-passivation kusetshenziswa ezingxenyeni zensimbi engagqwali, ikakhulukazi ukwakha ungqimba oluvikelayo lwe-oxide.Lawa ma-oxide angakhiwa ngokufudumeza noma ngezindlela zamakhemikhali, okungukuthi, ukucwiliswa nge-nitric acid noma isixazululo se-sodium chlorate.Ukuze uvimbele isixazululo ekucwilisweni, amakhemikhali Indlela idinga ukwelashwa kwe-wax yangaphambi kokuvala.