Silig bir ah oo bir ah

Silig bir ah oo bir ah

Birta la jeexjeexan waa bir bir ah oo heersare ah oo ka hortagi kara saxaafadda hawada ama kiimikada wasakhda ah. Birta aan sal lahayn waxay leedahay dusha sare oo qurux badan iyo iska caabbinta suuxdinta wanaagsan. Uma baahna in lagu daaweeyo daweyn dusha sare ah sida paut, laakiin waxay ku jirtaa astaamaha dusha sare ee salka birta ah ee birta ah. Waa nooc bir ah oo loo isticmaalo dhinacyo badan waxaana badanaa loo yaqaannaa bir aan dhib lahayn. Waxqabadka wakiilka waxaa ka mid ah 13 koromomium bir, 18-8 chromium-nickel birta iyo steel kale oo kale oo loo yaqaan 'alfoy' oo sare oo sare.

Marka laga eego aragtida metallography, sababta oo ah bir bir-qabadku waxay ka kooban tahay chromium, filim koromomiyada oo dhuuban ayaa laga sameeyay dusha sare. Filimkan ayaa goynaya oksijiinka soo gala birta wuxuuna ciyaaraa door u adkaysanaya.
Si loo ilaaliyo iska caabbinta jiifka ehelnimada ee birta wasakhda leh, bir waa inay ka kooban tahay in kabadan 12% chromium.
304 waa bir-u-qalmo aan ujeed lahayn oo si weyn loogu isticmaalo in lagu sameeyo qalab iyo qaybo u baahan wax qabad dhammaystiran oo dhameystiran 304 waxay u dhigantaa waddankeyga 0cr19ni9 (0cr18ni9)) 304 waxaa ku jira 19% chromium iyo 9% nikkel.
304 waa birta ugu badan ee loo yaqaan 'bir bir' iyo bir kulul oo kulul. Waxaa loo adeegsaday qalabka wax soo saarka cuntada, qalabka kiimikada, tamarta nukliyeerka, iwm.
304 faahfaahinta kiimikada birta ee birta ah c si mn ps ps s ps s cr Ni (Nickel) Mois431 ≤08 ≤0.00 ≤0.1.00 ≤0.03 ≤0.03 18.003.00.25 ~ 10.5.5
Waxyaabaha: 304, 304l, 316, 316l, 321, 321, 310, 310s, iwm Xadhig jilicsan; PC; PE; Xadhiga qashinka ee PVC, iwm.
Xadhiga adag ee birta ee birta
Faahfaahinta: ф0.15mm-ф50mm-ф50, 7 × 19, 1 × 19, 7 × 7, 7 × 7, 7 × 37, iwm, iwm, iwm.
Waxyaabaha: sus202, 301, 302, 302hq, 303, 303, 3031, 321, 321, 316, 316, 310, xadhkaha birta ee birta, xargaha xargaha. Xadhig ku dhegan oo caag ah, xadhig adag, xadhig jilicsan, nylon (ama PVC) xargaha fiilada caagga ah ee balaastigga ah, iwm.
Iskuxirka kiimikada%
C: ≤0.07 SI: ≤1.0 mn: ≤2.0 mn: ≤2.0 cr: 17.0 ~ 19.0 ~ 19.0 ~
Mo: Cu: TI: S: ≤0.03 P: ≤0.035
Guryaha jireed
Xoog siini (n / mm2) ≥205
Tsile xoog ≥520
Codadka (%) ≥40
Hardbeed HB ≤187 hrb≤90 hv ≤200
Cufnaanta 7.93 g · cm-3
Kuleyl gaar ah c (20 ℃) ​​0.502 j · (g · c) -1
FARSAMADA FARSAMADA λ / W (M · ℃) -1 (Heerkulka soo socda / ℃)
20 100 500
12.1 16.3 21.4
Falalka ballaarinta toosan α / (10-6 / ℃) (heerkulka soo socda / ℃)
20 ~ 100 20 ~ 200 20 ~ 300 20 ~ 400
16.0 16.8 17.5 18.1
Dib-u-caabbinta 0.73 ω ω · mm2 · m-m-1
Meel dhalaalaysa 1398 ~ 1420 ℃