Martensitic u'amea u'amea e faasino i se ituaiga o u'amea u'amea lona microstructure e tele lava martensite. O le chromium o loʻo i totonu o le martensitic stainless steel o loʻo i le va o le 12% - 18%, ma o ona elemene faʻafefiloi autu o le uʻamea, chromium, nickel ma carbon.
Martensitic u'amea u'amea e mafai ona fetuutuunai ana mea fa'ainisinia e ala i togafitiga vevela ma o se ituaiga o u'amea u'amea malo. Martensitic uamea e mafai ona vaevaeina i martensitic chromium uamea ma martensitic chromium-nickel sila e tusa ai ma tuufaatasiga vailaau eseese.
Va'aiga vave o Martensitic Stainless Steel | |
| Vaega | Apa siliva |
| Uiga | O se ituaiga u'amea fa'ama'a'a fa'ama'a'a ma le fausaga Martensitic |
| Togafitiga vevela | Fa'alili, tineia, fa'afefe |
| Elemene Alloy | Cr, Ni, C, Mo, V |
| Uuleleia | Mativa |
| Maneta | Alafua |
| Micro Structure | E masani lava Martensitic |
| Fa'ailoga masani | Cr13, 2Cr13, 3Cr13 |
| Talosaga | La'au afi ausa, Mea'ai Lau'a'ai, Mea Fa'a'otoga, Aerospace, Alamanuia o le gataifale |
Martensitic u'amea u'amea e faasino i se ituaiga o u'amea u'amea lona microstructure e tele lava martensite. O le chromium o loʻo i totonu o le martensitic stainless steel o loʻo i le va o le 12% - 18%, ma o ona elemene faʻafefiloi autu o le uʻamea, chromium, nickel ma carbon.
Martensitic u'amea u'amea e mafai ona fetuutuunai ana mea fa'ainisinia e ala i togafitiga vevela ma o se ituaiga o u'amea u'amea malo. Martensitic uamea e mafai ona vaevaeina i martensitic chromium uamea ma martensitic chromium-nickel sila e tusa ai ma tuufaatasiga vailaau eseese.
1. Martensitic Chromium Steel
I le faʻaopoopoga i le chromium, o le martensitic chromium steel o loʻo i ai foi se aofaʻi o carbon. O le chromium anotusi e fuafua ai le fa'afefe o le sila. O le maualuga o le carbon content, o le maualuga foi lea o le malosi, maaa ma le ofuina. O le fausaga masani o lenei ituaiga o uʻamea o le martensite, ma o nisi o loʻo i ai foi sina vaega itiiti o austenite, ferrite poʻo pearlite. E masani ona faʻaaogaina e gaosia ai vaega, vaega, mea faigaluega, naifi, ma isi mea e manaʻomia ai le malosi maualuga ma le maʻaʻa, ae e le manaʻomia ai le maualuga o le corrosion resistance. Fa'ailoga uamea masani o 2Crl3, 4Crl3, 9Crl8, ma isi.
2. Martensitic Chromium-Nikeli sila
Martensitic chromium-nickel uamea e aofia ai martensitic precipitation hardening uamea stainless, semi-austenitic precipitation faamaaaina uamea stainless ma maraging uamea stainless, ma isi, o ia mea uma e maualuga-malosi po o ultra-maualuga-malosi uamea stainless. O lenei ituaiga uamea e maualalo le kaponi (itiiti ifo i le 0.10%) ma o loʻo i ai le nikeli. O nisi togi e iai fo'i elemene maualuluga e pei o le molybdenum ma le 'apamemea. O le mea lea, o lenei ituaiga o uʻamea e maualuga le malosi, aʻo tuʻufaʻatasia le malosi ma le faigata faʻapea foʻi ma le faʻafefeteina. Fa'atinoga, weldability, ma isi e sili atu nai lo martensitic chromium sila. Crl7Ni2 o le u'amea u'amea martensitic maualalo e masani ona fa'aaogaina.
Martensiteu'amea fa'ama'a'a timugauamea e masani ona aofia ai foi Al, Ti, Cu ma isi elemene. E faʻafefeteina Ni3A1, Ni3Ti ma isi faʻasalalauga faʻamalosia vaega i luga o le martensite matrix e ala i le faʻamaʻaina o timuga e faʻaleleia atili ai le malosi o le sila. Semi-austenite (po o semi-martensitic) precipitation faamaaaina uamea stainless, ona o le tulaga tineia o austenite pea, o lea e mafai lava ona malulu le setete tineia ona faamalosia lea e ala i togafitiga faavaitaimi, matua togafitiga ma isi faiga. I lenei auala, o le austenite i le martensitic precipitation hardening stainless steel e mafai ona suia tuusao i martensite ina ua uma tineia, lea e tau atu i le le lelei o le faigata i le faagasologa mulimuli ane ma le faia. E masani ona faʻaaogaina togi uʻamea o 0Crl7Ni7AI, 0Crl5Ni7M02A1 ma isi. O lenei ituaiga uʻamea o loʻo i ai se malosi maualuga, e masani ona oʻo i le 1200-1400 MPa, ma e masani ona faʻaaogaina e fai ai vaega faʻavae e le manaʻomia ai le maualuga o le corrosion resistance ae manaʻomia le malosi maualuga.
O le fa'aogaina masani o le vevela mo le martensitic stainless steel o le tineia ma le fa'afefeteina o togafitiga. E masani ona filifili e malulu ile suauu poʻo le ea ile vevela ole 950-1050 ℃. Ona fa'afefe lea ile 650-750°C. E masani lava, e tatau ona faʻafefe vave pe a uma ona tineia ina ia puipuia ai le lafo mai le taʻe ona o le mamafa o le fausaga tineia.
Malosi maualuga-maualalo-carbon martensitic castings uʻamea uʻamea o loʻo i ai se vaega itiiti o nickel, molybdenum, silicon ma isi alloying elemene o loʻo i ai uiga lelei faʻainisinia atoatoa, mea uʻamea ma ofuina teteʻe ina ua uma normalizing ma tempering. O fa'amea fa'apenei e fa'aaogaina lautele i le tu'ufa'atasia o le tu'u fa'atasi ma le tu'u + fa'ameamea fa'aoso o turbines hydraulic tetele. I lenei tulaga, o le vevela togafitiga faʻapitoa e masani ona filifilia e masani ile 950 - 1050 ℃ ma le faʻafefe ile 600 -670 ℃.
Taimi meli: Aukuso-17-2021