Ntaub ntawv

316L stainless hlau yog ib qho kev sib txuam ntawm kev ua haujlwm feem ntau hu ua "Marine qib stainless hlau" vim tias nws siv nyob rau hauv ze li 90% ntawm cov ntawv thov marine - suav nrog kev lim dej. Ntxiv rau cov hlau xws li hlau thiab npib tsib xee, 316L muaj 16-18% chromium thiab 2-3% molybdenum. Cov ntsiab no yog qhov tseem ceeb vim tias lawv txhim kho lub corrosion ntawm corrosion; Chromium sib cuam tshuam nrog oxygen nyob rau hauv dej hiav txwv los ua txheej tiv thaiv oxide, thaum molybdenum txhim kho cov hlau ua kom pitting corrosion. Ib qho ntxiv, 316L muaj cov ntsiab lus roj carbon qis (li no siv "l" hauv nws lub npe), uas muab nws kev tiv thaiv zoo dua rau kev xeb.

Cov Ntawv Thov thiab Cov Khoom Siv
Kev ua haujlwm yog siv rau ib txwm ua rau ib txwm ua rau cov qauv ntawm cov roj carbon hlau thiab cov tawv ntoo tsawg tom qab forging, kub dov lossis muab rhaub. Lub hardness tau txais tom qab ib txwm nyob ntawm cov steel depensional tsom xam thiab txias siv siv (kwv yees li 100-250 HB).

Qib 1.440 lossis 316L yog ib tug Austenitic Stainless Hlau AISI 316 nrog heev zoo corrosion distance vim nws cov ntsiab lus chromium thiab molybdenum cov ntsiab lus thiab cov ntsiab lus muaj roj carbon. Nws lub zog hauv lub xeev tawv yog li ntawm 600 mpa rau cov kab uas loj loj, tab sis rau cov ntu me me, lub zog tuaj yeem nce los ntawm kev ua haujlwm txias.

ib txwm muaj
Onctizing tshem tawm impurities los ntawm cov hlau thiab nce nws lub zog thiab hardness. Qhov no tau ua tiav los ntawm kev hloov qhov loj ntawm cov nplej kom lawv muaj kev sib haum xeeb thoob plaws hauv daim ntawv hlau. Cov hlau yog thawj rhuab rau ib qho kub thiab txias thiab tom qab ntawd txias los ntawm huab cua.

Ntawm ntau cov ntawv thov, cov khoom lag luam suav nrog cov cuab yeej rau kev siv tshuab, tshuaj lom neeg, kev saib xyuas, khoom noj thiab dej haus.

316L yuav siv tau

Kev ua si yog ib txoj kev kho cua sov siv los ua cov hlau ntau dua thiab ductile lossis cov txheej txheem tawv. Kev ua haujlwm ib txwm muaj nrog cua sov cov khoom rau qhov kub thiab txias thiab tom qab ntawd ua rau nws mus rau chav ntsuas kub tom qab cua sov, cia nws txias rau chav sov. Qhov cua sov thiab qeeb cua txias ulters cov hlau cov microstructure, txo nws lub hardness thiab nce nws duction.

Annealing ntawm 1050 thiab 1080¡Ãx¡-tau ua tom qab forging, ua raws li los ntawm restore corrosion tsis kam, tab sis tsis muaj kev kho cua sov kom tawv 316L.

Nws yog ib qho tseem ceeb uas cov khoom siv rau txhua qhov project muaj cov khoom siv kho kom raug rau cov ntawv thov tshwj xeeb. Cov txheej txheem kev kho cua sov yog cov feem ntau siv los hloov cov khoom siv me me ntawm cov hlau, thiab ib qho kev kho cua sov ntau dua yog li qub.

Rau cov kev siv kub kub, lub siab carbon variant 316h stainless hlau thiab stabilized qib 316ti stainless hlau yuav tsum tau siv.

Tus qauv Austenitic ntawm 316 stainless hlau muab cov tawv muaj zog zoo txawm tias tsis kub.

Stainless Qib 316TI muaj qhov me me ntawm titanium. Cov ntsiab lus titanium feem ntau tsuas yog nyob ib ncig 0.5%. Titanium atoms ruaj khov tus qauv ntawm 316 ntawm qhov kub ntawm ntau tshaj ntawm 800¡Ãc.

Thaum 300 series stainless cov hlau yog nrov heev, lawv tsis yog thoob ntiaj teb tsim nyog rau tag nrho cov txheej txheem cov txheej txheem kev siv piping daim ntawv thov. Piv txwv li, txawm hais tias lawv yog corrosion resistant, 300 series formulations tsis ua tau zoo nyob rau hauv muaj ntawm chlorides. Hauv cov xwm txheej no, cov hlau nrog ntau dua cov ntsiab lus ntau dua li molybdenum, chromium thiab npib tsib xee yog nyiam.

Hom 316 yog ntau tiv taus rau cov sulfuric acid daws teeb meem tshaj lwm yam chromium-tsib xee. Hom 316 tiv taus cov kua qaub ntev txog 5% ntawm qhov kub thiab txias txog 120¡ÃF (49¡ÃF). Cov hom no tau tiv thaiv zoo heev rau cov kev cuam tshuam ntau dua ntawm qhov kub hauv qab 100¡u F (38¡Ã C).

Feem ntau, hom 316 qib yuav raug suav tias muaj kev sib luag zoo nyob rau hauv ib puag ncig ib puag ncig. Ib qho kev zam tseem ceeb yog intergranular corrosion nyob rau hauv lub tshav kub-cuam tshuam rau welds nyob rau hauv cov chaw muaj kev sib txuam txaus. Hauv cov xov xwm zoo li no, hom 316L yog qhov tsim nyog rau kev siv vuam dua hom 316 vim tias cov ntsiab lus muaj roj carbon ntau ntxiv rau hauv kev txhim kho corrosion.

Type 316 alloy is considered suitable for some marine environment applications, such as ship rails and hardware, and the exterior walls of buildings near the ocean that are exposed to salt spray. Hom 316 Stainless hlau qhia tsis muaj pov thawj ntawm kev corrosion hauv 100-teev, 5% kev sim.

Kev txhawb nqa lossis ntev nthuav dav ntawm hom 316L rau 800-1500ÃF (427-816¡Ãc) yuav muaj kev phom sij. Ib qho ntxiv, kev nyuaj siab kev daws teeb meem nruab nrab ntawm 100-1500ÃF (593-816¡Ãc) tej zaum yuav ua rau hom me me embrittlitty.

Austenitic stainless hlau yog raug rau kev ntxhov siab corrosion cracking (SCC) hauv cov av halc. Txawm hais tias hom 316 alloys muaj kev tiv taus scc ntau dua 18cr-8 ni alloys vim lawv molybdenum cov ntsiab lus, lawv tseem muaj kev pheej hmoo. Cov mob uas tsim scc no yog: (1) Lub xub ntiag ntawm cov hales (feem ntau cormal

Lub hom phiaj ntawm kev npaj cua sov yog los txhim kho cov txheej txheem kev ntxhov siab hauv sab hauv thiab npaj ib qho kev sib cav sib ceg zoo rau kev kho ua cua sov kawg. Txheej txheem kev kho cua sov muaj cov annealing, norming, kev laus, quenching thiab lig.

Lub hom phiaj ntawm kev kho cua sov ua ntej: kom tshem tawm qee yam tsis xws luag thiab cov khoom tiav rau cov khoom lag luam rau tom qab txias thiab kho cua sov ua kom sov.

Cov txheej txheem kho cua sov uas cov hlau yog rhuab mus rau ib lub sijhawm uas tsim nyog, thiab tom qab ntawd, txias kom tau ib lub sijhawm zoo kom tau txais tus qauv kaw rau qhov sib npaug ntawm qhov sib npaug ntawm qhov sib npaug ntawm cov annealing.

SA312 TURP304 YEEB MEEM yog pov thawj los ua ib qho khoom siv ntau heev uas tuaj yeem siv ntau yam ntawm kev lag luam tseem ceeb. Alloy Qib 304 stainless hlau 304 yeeb nkab yog nrov vim tias nws zoo corrosion tsis kam nyob rau ntau yam ntawm cov xov xwm.

Lwm qhov tshwj xeeb ntawm 304 stainless hlau yeeb nkab yog tias cov hlau muaj qhov tensile zoo heev thiab kev pom zoo, uas tau pom txawm tias cov kav dej yog cov pa dej tsawg.

Stainless hlau 304 tubing yog muaj raws li seamless lossis welded. Cov kav dej tuaj yeem kos tau raws li txoj hlab uas tsis sib xws los ntawm ib billet lossis welded los ntawm sawb lossis daim ntawv. Muaj ntau txoj kev vuam sib txawv xws li Reactance vuam rau cov kav dej me me thiab hluav taws xob vuam rau cov kav dej loj dua.

316 Stainless hlau yog ntau yam; Nws tsis tsuas yog muaj zog ua kev sib haum thiab muaj peev xwm muaj lub peev xwm khawm lossis crimp, yog li nws tuaj yeem hloov tau yooj yim rau ntau cov ntawv thov.

Nyob rau hauv lub siab qhov chaw ib puag ncig, 316 stainless hlau nyhav rau outperform 304.

316L stainless hlau seamless tubing yog siv rau cov ntawv thov kom pom zoo dua. Tsawg carbide nag lossis daus thaum lub sij hawm pipeline vuam txo cov intregranular thiab corrosion. Seamless Tubes khwv tau ntau los ntawm? " rau 16 ".

S32154 tuaj yeem muab tau yooj yim rau lwm tus cov hlau uas tsis siv los ntawm cov hlau tsis huv.

SMO 254 ERW YEEB yog siv qhov chaw uas cov khoom thiab corrosion tsis kam ntawm cov hlau yuav tsum muaj. Lub siab Molybdenum thiab chromium cov ntsiab lus tseem ua rau smoo 254 square raj muaj cov kua qaub uas tuaj yeem tiv thaiv pitting.

254smo (undal S31254, Astm F44, 1.4547) yog ib tug thiaj li hu super ustenitic steel. Los ntawm kev nce cov ntsiab lus Molybdenum mus rau 6%, nws tiav qhov pitting tivthaiv tus lej (pren)> 43, uas zoo ib yam li super duplex stainless hlau stainless hlau stainless (sdss).

254smo ua los ntawm kev muaj peev xwm ntawm Molybdenum, chromium thiab nitrogen muaj zoo tsis kam rau pitting thiab crevice corrosion. Tooj liab hloov kho corrosion tsis kam nyob rau hauv qee cov kua qaub. Tsis tas li ntawd, 254smo muaj kev ntxhov siab zoo corrosion zog corrosion kev tawg vim nws cov ntsiab lus ntawm npib tsib xee, chromium thiab molybdenum.