Boiler - qib steel, feem ntau raug xa mus rau hauv lub voj voog kev lag luam xws li steel rau boilers thiab cov hlab ntsha siab, hais txog cov hlau tshwj xeeb tshwj xeeb tsim los rau kev tsim cov khoom siv siab-cov khoom siv xws li boilers, cov hlab ntsha siab, thiab cov kav dej. Txij li cov cuab yeej no raug kub siab, siab siab, thiab corrosion los yog yaig los ntawm qhov nruab nrab ntev ntev, qhov yuav tsum tau ua rau cov hlau zoo, kev ua tau zoo, thiab kev ntseeg tau siab dua li cov qauv hlau zoo tib yam.
Hauv cov ntsiab lus yooj yim: cov hlau zoo tib yam tuaj yeem siv los tsim tsev thiab txuas hniav, tab sis nws yuav tsis muaj kev nyab xeeb rau kev siv hauv boilers -vim tias sab hauv ntawm lub boiler muaj - qhov kub thiab txias los yog siab - roj, thiab yog tias cov khoom ua tsis tiav, qhov tshwm sim tuaj yeem ua rau muaj kev puas tsuaj loj heev.
Dab tsi yog qhov tseem ceeb ntawm kev ua haujlwm ntawm boiler - qib steel?
| Kev xav tau kev ua haujlwm | Cov Lus Qhia Tshwj Xeeb |
| Siab - qhov kub thiab txias | Ua kom muaj zog txaus thiab lub zog tensile ntawm qhov kub thiab txias los tiv thaiv creep deformation |
| Oxidation kuj | Qhov siab - qhov kub thiab txias sab saum npoo yuav tsum tsis txhob tsim cov nplais xoob, yog li tiv thaiv phab ntsa thinning thiab paug ntawm qhov nruab nrab |
| Corrosion kuj | Tiv thaiv corrosion ntawm dej, chav dej, lossis cov pa hluav taws xob (xws li, oxygen corrosion, alkali embrittlement, hydrogen corrosion) |
| Zoo weldability | Boiler Cheebtsam feem ntau xav tau vuam; cov khoom yuav tsum tsis txhob tawg los yog harden ho |
| Txaus siab siab -kub creep zog nrog tswj tau creep txwv | Deformation yuav tsum qeeb thiab tswj tau thaum lub sij hawm ntev - kev ua haujlwm nyob rau hauv siab - qhov kub thiab txias |
| Zoo qis -kub toughness | Txias brittleness tawg yuav tsum tau zam thaum lub caij ntuj no pib los yog kuaj hydrostatic |
| Kev nruj microstructural purity | Tsawg leej faj, tsis muaj phosphorus, thiab tsis muaj kev sib cais hnyav, cov pob dawb, thiab lwm yam tsis xws luag |
Cov qauv thiab qib ntawm Common Boiler Steels
Suav Standards (GB/T 713 - Hlau Phaj rau Boilers thiab Siab Vessels)
- Q245R: Cov pa roj carbon ntau, nrog qhov siab tshaj plaws ua haujlwm ntawm kwv yees li 400 degree, siv hauv nruab nrab - thiab qis - siab boilers
- Q345R: Lub zog siab dua, siv dav, nrog qhov siab tshaj plaws ua haujlwm kub ntawm kwv yees li 475 degree
- Q370R / Q420R: siab zog, siv nyob rau hauv cov hlab ntsha loj
- 15CrMoR: Chromium-molybdenum steel, siab- kub resistant (txog li 550 degree), tiv taus hydrogen corrosion
American Standards (ASTM)
- ASTM A515 Gr.60/70: Cov pa roj carbon steel rau nruab nrab - thiab siab - cov hlab ntsha kub siab, haum rau qhov kub thiab txias hauv qab li ntawm 455 degree
- ASTM A516 Gr.60/65/70: Carbon steel rau nruab nrab- thiab qis-kub siab cov hlab ntsha, nrog rau qhov zoo toughness, siab txwv 538 degree
- ASTM A387 Gr.11/12/22: Chromium-molybdenum steel, rau siab- kub (550℃-620 degree) kev pabcuam
European Txuj (EN 10028)
- P265GH / P355GH: General- lub hom phiaj carbon steel boiler phaj
- 16Mo3: Molybdenum hlau, siv hauv qab li ntawm 500 degree
- 13CrMo4-5 / 10CrMo9-10: Chromium-molybdenum steel, rau kev siv kub
Cov ntsiab lus
Boiler - qib steelyog cov khoom siv hauv paus uas ua kom muaj kev nyab xeeb ntawm cov boilers thiab cov hlab ntsha siab. Nws tsis yog ib qib tshwj xeeb tab sis yog ib pawg tswj hwm nruj me ntsis ntawm cov ntaub ntawv -txhua theem, los ntawm smelting thiab dov mus rau kev soj ntsuam, ua raws li cov qauv thiab cov kev qhia tshwj xeeb. Kev nkag siab txog cov ntsiab lus thiab kev ua haujlwm ntawm boiler- qib steel pab cov engineers ua kom muaj kev nyab xeeb, raug nqi- ua tau zoo, thiab ua raws li kev txiav txim siab thaum xaiv cov khoom.
Nco tseg: Hauv kev siv engineering tiag tiag, qhov siab tshaj plaws kev pabcuam kub ntawm cov khoom siv yuav tsum tau txiav txim siab los ntawm kev suav nws lub zog creep raws li yam xws li cov tuab tshwj xeeb, qib kev ntxhov siab, thiab kev pabcuam lub neej; ib tug yuav tsum tsis txhob cia siab rau tus qauv qhov tseem ceeb rau cov khoom qib.
Tiv tauj peb kom paub ntau ntxiv
