1. Cov txheej txheem tseem ceeb
| Chaw ua uas tsis tau haus | Qhov Zoo Tshaj Plaws rau S3555J0WP | Lub hom phiaj |
|---|---|---|
| Cua sov kub | 1100-1250 Qib (Austenitizing) | Ua kom cov teeb tsa microstrorm microstructure. |
| Soaking sijhawm | 1-2 feeb ib mm tuab | Homogenizes kub. |
| Txoj Kev Ua Pib Temp | 850-950 Qib (zam<750°C) | Tiv thaiv kev tawg thiab khaws cov duction. |
| Tus nqi deformation | 0.1-5 s⁻¹ (tus nqi lim) | Sib npaug formability thiab recrystallization. |
| Cua txias tus nqi | Cua txias (patina-phooj ywg) lossis tswj (rau kev tawv) | Zam kev loj hlob ntau dhau kev loj hlob. |
2. Cov tswv yim txhim kho
(A) Tswj Kub
Preheating: Thaum tshav kub kub rau1100-1250 degreekom yaj carbides thiab tsis txhob banded microstructures.
Tsis txhob overheating: >1300 DEGURDURE RURSS grain dealsening thiab oxide scaling.
(B) deformation & lim tus lej
Ib Leeg-Pass Txo: Txwv txiav rau 20-30% hom ib kis kom tsis txhob ntug kev tawg.
Siab tus nqi: Tej zaum yuav rov qab nplej tab sis yuav tsum tau cov tub rog siab dua.
(C) post-forming txias
Cua Txias: Txheem rau MATINE tsim; Ua kom pom kev zoo (ua tau raws li EN 10025-5).
Ua kom nrawm txias (yog xav tau): Rau cov kab thicker, siv cua lossis ua pa kom tsis txhob muaj cov aav.
3. Microstructure & Cov Hom Phiaj
Ferrite-Pearlite Tshuav: Tsom rau cov nplej nplua (ASTM 7-8) ntawm kev tswj kom txias.
Zam Txim Martensite: Slow cooling from >750℃tiv thaiv brittle qeb.
4. Kev siv tau zoo
Kev Ntsuas Hardness: Phiaj 150-200 HB rau kev zoo siab machinity / kav ntev.
Charpy Qhov Kev Ntsuas: Ua kom muaj kev nyuaj ntau dua los yog sib npaug rau 27 j ntawm -20℃ua kev sib txheeb.
5. Kev daws teeb meem
| Tsab | Kev kom | Lus teb |
|---|---|---|
| Ntug Nruag | Tsawg txoj kev sib npaug ua temp lossis siab lim. | Nce temp; txo tus nqi strain. |
| Pluag patina adchesion | Sai sai txias lossis scaling. | Tswj cov cua txias; descale ua ntej tsim. |
