1. Dab tsi yog qhov tseem ceeb ntawm ASTM A312?
Teb:ASTM A312 npog seamless, ncaj- seam welded, thiab hnyav hnyav ua haujlwm welded austenitic stainless hlau yeeb nkab npaj rau siab - kub thiab kev pabcuam corrosive. Nws yog ib qho ntawm feem ntau specifications rau stainless hlau yeeb nkab siv nyob rau hauv cov txheej txheem industries.
2. Sau npe peb qib uas muaj ntau tshaj plaws raws li ASTM A312.
Teb:Peb qib feem ntau yog:
TP304/304L:Tus qauv "18-8" stainless hlau, zoo heev rau ntau yam kev pabcuam corrosive.
TP 316/316L:Muaj Molybdenum (Mo) rau kev txhim kho kev tiv thaiv rau pitting thiab crevice corrosion, tshwj xeeb tshaj yog los ntawm chlorides.
TSO 321:Stabilized nrog Titanium (Ti) los tiv thaiv rhiab heev (chromium carbide nag lossis daus) thaum vuam thiab siab - kev pabcuam kub.
3. Dab tsi yog qhov txawv ntawm qhov "Seamless" (SMLS) thiab "Welded" yeeb nkab hauv A312?
Teb:
Seamless (SMLS):Tsim los ntawm kev tho ib lub pob zeb, ua rau cov yeeb nkab tsis muaj vuam seam. Nws yog feem ntau nyiam rau kev siab dua, kev pabcuam tseem ceeb, lossis qhov uas muaj kev pheej hmoo ntawm corrosion ntawm ib txoj kab weld yog ib qho kev txhawj xeeb.
Welded:Tsim los ntawm ib tug dov phaj los yog sawb thiab welded raws nws ntev. Weld seam feem ntau yog kho cua sov (annealed) thiab txias ua haujlwm kom ua tiav cov khoom zoo ib yam li cov yeeb nkab seamless. Nws yog tus nqi ntau dua - siv tau rau ntau daim ntawv thov.
4. Qhov "TP" ua ntej yog dab tsi hauv cov npe qib zoo li TP304?
Teb:"TP" sawv cev rau "Type." Nws qhia txog cov tshuaj lom neeg muaj pes tsawg leeg thiab hom alloy raws li tau hais tseg hauv tus qauv cov lus.
5. Lub hom phiaj ntawm "Kev daws teeb meem Annealing" kev kho cua sov xav tau los ntawm A312 yog dab tsi?
Teb:Kev daws annealing heats cov yeeb nkab mus rau qhov kub thiab txias sai sai (quenches) nws. Cov txheej txheem no tso carbides rau hauv kev daws teeb meem, rov ua kom muaj kev tiv thaiv corrosion uas tej zaum yuav tau degraded thaum lub sij hawm tsim khoom, thiab softens cov khoom kom ua tiav cov khoom siv kho tshuab.
