Txoj kev faib cov hlau yog ntau yam, txoj kev tseem ceeb muaj xya hauv qab no:
1, raws li qhov zoo ntawm kev faib tawm
(1) Cov hlau zoo tib yam (P 0.045% lossis tsawg dua, S 0.050% lossis tsawg dua)
(2) cov hlau zoo (P, S yog 0.035% lossis tsawg dua)
(3) cov hlau zoo (P 0.035% lossis tsawg dua, S 0.030% lossis tsawg dua)
2, cais los ntawm cov tshuaj muaj pes tsawg leeg
Cov hlau me me (1) carbon steel: a. 0.25% lossis tsawg dua (C); B. nruab nrab carbon steel (C acuities yog 0.25 ~ 0.60%); C. siab carbon steel (0.60%) los yog tsawg dua c.
(2) hlau alloy: a. cov hlau tsis tshua muaj hlau (cov ntsiab lus alloy ntawm tag nrho 5% lossis tsawg dua); B. nyob rau hauv alloy steel (alloy khoom tag nrho cov ntsiab lus> 5 ~ 10%); C. siab alloy steel (alloy element tag nrho cov ntsiab lus> 10%).
3, raws li tus txheej txheem ntawm kev faib tawm
(1) forging steel; (2) steel hlau; (3) kub dov steel, (4) txias-draw steel.
4, raws li kev faib tawm microstructure
(1) lub xeev annealing: a. hypoeutecoid steel (ferrite + pearlite); B. eutectoid steel (pearlite); C. hypereutectoid steel (pearlite thiab cementite); D. ledeburite steel (pearlite thiab cementite).
(2) yog lub xeev ntawm hluav taws: a. pearlitic hlau; B. bainite hlau; C. martensitic hlau; D. austenitic hlau.
(3) yam tsis muaj theem hloov lossis ib feem ntawm kev hloov theem
5, raws li lub hom phiaj kev faib tawm
(1) Kev tsim kho thiab engineering steel: a. zoo tib yam carbon structural steel; B. low alloy structural steel; C. steel hlau.
(2) steel qauv: a. machinery manufacturing quenched thiab tempered steel: (a) structural steel; (b) nto hardening steel: nrog rau carburizing steel, permeability ntawm ammonia steel, nto quenching hlau; (c) dawb txiav steel; (d) Cov yas txias ua cov hlau: nrog rau cov hlau ua kom txias, txias taub hau hlau.
B. caij nplooj ntoos hlav steel
C. bearing steel
(3) Cov cuab yeej steel: a. carbon hlau; B. alloy cuab yeej steel; C. kev kub ceev cuab yeej steels.
(4) kev ua haujlwm tshwj xeeb ntawm cov hlau: a. acid-pov thawj stainless hlau; B. Thaum tshav kub kub resistant steel, nrog rau oxidation tshav kub siv hlau, hlau, steel valve; C. electrothermal alloy hlau; D. hnav resistant steel; E. cryogenic hlau; F. hluav taws xob hlau.
(5) kev steel hlau, xws li txuas nrog hlau, nkoj steel, boiler steel, siab nkoj steel, kev ua liaj ua teb machinery, steel, thiab lwm yam.
6, kev faib tawm dav dav
(1) zoo tib yam steel
A. Q195 carbon structural steel: (a); (b) Q215 (A, b); (c) Q235 (A, B, c); (d) Q255 (A, B); Q275 (e).
B. low alloy structural steel
C. tshwj xeeb-lub hom phiaj siv cov qauv hlau
(2) cov hlau zoo (nrog rau cov hlau zoo)
A. zoo carbon structural steel structural steel: (a); (b) alloy structural steel; (c) caij nplooj ntoos hlav steel; (d) dawb txiav steel; (e) bearing steel; (f) tshwj xeeb siv cov hlau zoo.
B. cuab yeej steel carbon hlau: (a); (b) alloy cuab yeej steel, (c) kev kub ceev cuab yeej steels.
Post lub sij hawm: Nov-02-2021