Insimbi engagqwali ye-Martensitic isho uhlobo lwensimbi engagqwali okune-microstructure yayo ikakhulukazi i-martensite. Okuqukethwe kwe-chromium yensimbi engagqwali ye-martensitic iphakathi kuka-12% - 18%, futhi izakhi zayo eziyinhloko eziyingxubevange ziyinsimbi, i-chromium, i-nickel ne-carbon.
Insimbi engagqwali ye-Martensitic ingakwazi ukulungisa izinto zayo zokusebenza ngokwelashwa kokushisa futhi iwuhlobo lwensimbi eqinile eqinile. Insimbi engagqwali ye-Martensitic ingahlukaniswa ngensimbi ye-martensitic chromium kanye nensimbi ye-martensitic chromium-nickel ngokuya ngezakhi zamakhemikhali ezihlukene.
Ukubuka Okusheshayo kwe-Martensitic Stainless Steel | |
| Isigaba | Insimbi engagqwali |
| Incazelo | Uhlobo lwensimbi engagqwali eqinile enesakhiwo se-Martensitic |
| Ukwelashwa Kokushisa | Ukuphefumula, ukuphefumula, ukuphefumula |
| I-alloy Elements | Cr, Ni, C, Mo, V |
| Ukushisela | Impofu |
| Uzibuthe | Maphakathi |
| Isakhiwo esincane | Ikakhulukazi i-Martensitic |
| Amabanga Ajwayelekile | I-Cr13, 2Cr13, 3Cr13 |
| Izinhlelo zokusebenza | I-steam turbine blade, I-Tableware, Izinsimbi Zokuhlinza, I-Aerospace, izimboni zasolwandle |
Insimbi engagqwali ye-Martensitic isho uhlobo lwensimbi engagqwali okune-microstructure yayo ikakhulukazi i-martensite. Okuqukethwe kwe-chromium yensimbi engagqwali ye-martensitic iphakathi kuka-12% - 18%, futhi izakhi zayo eziyinhloko eziyingxubevange ziyinsimbi, i-chromium, i-nickel ne-carbon.
Insimbi engagqwali ye-Martensitic ingakwazi ukulungisa izinto zayo zokusebenza ngokwelashwa kokushisa futhi iwuhlobo lwensimbi eqinile eqinile. Insimbi engagqwali ye-Martensitic ingahlukaniswa ngensimbi ye-martensitic chromium kanye nensimbi ye-martensitic chromium-nickel ngokuya ngezakhi zamakhemikhali ezihlukene.
1. Insimbi ye-Martensitic Chromium
Ngaphezu kwe-chromium, insimbi ye-martensitic chromium nayo iqukethe inani elithile lekhabhoni. Okuqukethwe kwe-chromium kunquma ukumelana nokugqwala kwensimbi. Ukuphakama kwekhabhoni, amandla aphezulu, ubulukhuni nokumelana nokugqoka. Isakhiwo esivamile salolu hlobo lwensimbi yi-martensite, kanti ezinye nazo ziqukethe inani elincane le-austenite, i-ferrite noma i-pearlite. Isetshenziselwa ikakhulukazi ukwenza izingxenye, izingxenye, amathuluzi, imimese, njll. ezidinga amandla aphezulu nobulukhuni, kodwa azidingi ukumelana nokugqwala okuphezulu. Amabanga ensimbi ajwayelekile ngu-2Crl3, 4Crl3, 9Crl8, njll.
2. Insimbi ye-Martensitic Chromium-Nickel
Insimbi ye-martensitic chromium-nickel ifaka insimbi eqinile eqinile ye-martensitic, imvula encane-austenitic eqinisa insimbi engagqwali kanye nensimbi engagqwali e-maraging, njll., konke okungama-high-high noma ama-ultra-high-high-strength stainless steels. Lolu hlobo lwensimbi lunokuqukethwe kwekhabhoni ephansi (ngaphansi kuka-0.10%) futhi luqukethe i-nickel. Amanye amabanga aqukethe nezinto eziphakeme ezifana ne-molybdenum nethusi. Ngakho-ke, lolu hlobo lwensimbi lunamandla amakhulu, kuyilapho luhlanganisa amandla nokuqina kanye nokumelana nokugqwala. Ukusebenza, ukushisela, njll. kungcono kunensimbi ye-martensitic chromium. I-Crl7Ni2 isetshenziswa kakhulu i-low-nickel martensitic steel stainless steel.
I-Martensiteimvula iqina ingenabalainsimbi ngokuvamile iqukethe i-Al, Ti, Cu nezinye izakhi. Ingenisa i-Ni3A1, i-Ni3Ti nezinye izigaba zokuqinisa ukuhlakazwa kwe-martensite matrix ngokuqina kwemvula ukuze kuthuthukiswe amandla ensimbi. Semi-austenite (noma semi-martensitic) kwezulu lukhuni insimbi engagqwali, ngoba isimo ucime namanje austenite, ngakho isimo ucime usengakwazi ukubanda wasebenza bese kuqiniswa ukwelashwa Lesisemkhatsini, ukwelashwa ukuguga kanye nezinye izinqubo. Ngale ndlela, i-austenite ku-martensitic precipitation eqinisa insimbi engagqwali ingashintshwa ngokuqondile ibe i-martensite ngemva kokucisha, okuholela kububi bobunzima ekucubunguleni nasekubunjweni okulandelayo. Amabanga ensimbi asetshenziswa kakhulu yi-0Crl7Ni7AI, 0Crl5Ni7M02A1 njalonjalo. Lolu hlobo lwensimbi lunamandla amakhulu, ngokuvamile afinyelela ku-1200-1400 MPa, futhi luvame ukusetshenziselwa ukwenza izingxenye zesakhiwo ezingadingi ukumelana nokugqwala okuphezulu kodwa ezidinga amandla aphezulu.
Ukwelashwa kokushisa okuvame ukusetshenziswa kwe-martensitic insimbi engagqwali ukucisha kanye nokwelashwa okuthambisayo. Ngokuvamile khetha ukupholisa emafutheni noma emoyeni ezingeni lokushisa elingu-950-1050 ℃. Bese ushisa ku-650-750 ° C. Ngokuvamile, kufanele kuthukutheliswe ngokushesha ngemva kokucisha ukuze kuvinjelwe ukukhishwa ekuqhekekeni ngenxa yokucindezeleka kwesakhiwo esicishiwe.
Amandla aphezulu we-low-carbon martensitic steel stainless steel castings aqukethe inani elincane le-nickel, i-molybdenum, i-silicon nezinye izakhi ze-alloying zinezici ezinhle eziphelele zemishini, izakhiwo zokushisela kanye nokumelana nokugqoka ngemva kokujwayelekile kanye nokushisa. Ukubunjwa okunjalo kusetshenziswa kabanzi ekubunjweni okubalulekile kanye nokuphonsa + ama-welding ama-turbine amakhulu we-hydraulic. Kulokhu, ukucaciswa kokwelashwa kokushisa okuvame ukukhethwa kujwayelekile ku-950 - 1050 ℃ futhi kushise ku-600 -670 ℃.
Isikhathi sokuthumela: Aug-17-2021