1. Dab tsi yog qhov txawv ntawm 316L thiab 317L stainless hlau seamless kav?
Ob leeg 316L thiab 317L yog qib qis- carbon stainless hlau qib, thiab qhov sib txawv tseem ceeb yog nyob rau hauv cov ntsiab lus ntawm chromium thiab molybdenum: ① Tshuaj muaj pes tsawg leeg: 317L muaj chromium siab dua (18.00-20.00%) thiab molybdenum (3.00%) (10.00%). 16.00-18.00%, Mo 2.00-3.00%). ② Corrosion tsis kam: 317L muaj kev tiv thaiv zoo dua rau pitting corrosion, crevice corrosion, thiab corrosion los ntawm cov acids muaj zog (xws li sulfuric acid, phosphoric acid) tshaj 316L, ua rau nws haum rau ntau qhov hnyav corrosive ib puag ncig. ③ Daim ntawv thov: 316L yog siv rau kev lag luam marine thiab tshuaj lom neeg, thaum 317L yog siv rau high-concentration acid tsheb thauj mus los, tshuaj reactors, thiab lwm yam scenarios nrog hnyav heev corrosion.
2. Dab tsi yog cov txheej txheem ntawm seamless steel kav, thiab nws txawv li cas ntawm welded steel kav?
Cov txheej txheem ntawm cov kav dej seamless steel feem ntau suav nrog: cov cua kub cua sov → tho → dov (elongation, sizing) → kho cua sov → straightening → soj ntsuam → ntim. Lub ntsiab feature yog tias cov yeeb nkab yog tsim los ntawm kev tho ib qho khoom siv hlau, tsis muaj vuam seams, yog li nws muaj lub siab zoo dua -cov kabmob muaj peev xwm thiab kev ua haujlwm zoo. Welded steel kav yog tsim los ntawm dabtsi yog khoov steel daim hlau los yog hlau strips thiab ces welding cov seams, uas muaj vuam seams thiab qis siab - bearing muaj peev xwm tshaj seamless kav. Seamless kav dej yog tsim rau siab -siab, siab - kub, thiab corrosive ib puag ncig, thaum welded kav yog tsim rau cov tsis tshua muaj siab - kua kis tau tus mob.
3. Yuav ua li cas txiav txim siab phab ntsa thickness ntawm seamless steel kav rau ntau qib thiab kev siv?
Cov phab ntsa thickness ntawm seamless steel kav yog txiav txim raws li nram no: ① Ua hauj lwm siab: siab ua hauj lwm siab yuav tsum tau thicker phab ntsa thickness los xyuas kom meej tias cov yeeb nkab muaj peev xwm tiv taus lub siab tsis bursting. ② Ua haujlwm kub: Siab- qhov kub thiab txias ib puag ncig yuav txo lub zog ntawm cov yeeb nkab, yog li xav tau cov phab ntsa tuab. ③ Nruab nrab corrosion: Corrosive media yuav ua rau phab ntsa thickness poob, yog li cov phab ntsa tuab yuav tsum xav txog qhov kev tiv thaiv corrosion (feem ntau yog 0.5-3mm, nyob ntawm seb qhov corrosion ntawm qhov nruab nrab). ④ Cov kav dej txoj kab uas hla: Cov kav dej loj dua yuav tsum muaj cov phab ntsa tuab kom muaj kev ruaj ntseg. ⑤ Qib: Cov qib sib txawv muaj lub zog sib txawv, yog li nyob rau hauv tib lub siab thiab txoj kab uas hla, siab - qib zog (xws li API 5L X42, 4340) tuaj yeem siv cov phab ntsa tuab dua li qib qis zog (xws li A106 Qib B).
4. Dab tsi yog txoj hauv kev tshuaj xyuas rau cov kav dej seamless steel, thiab lawv lub hom phiaj yog dab tsi?
Cov kev tshuaj ntsuam xyuas feem ntau rau cov kav dej seamless steel muaj xws li: ① Kev tshuaj xyuas tshuaj lom neeg muaj pes tsawg leeg (xws li spectral tsom xam): txhawm rau txheeb xyuas seb cov tshuaj muaj pes tsawg leeg ntawm cov yeeb nkab ua tau raws li cov qauv kev cai ntawm qib. ② Kev ntsuam xyuas cov cuab yeej cuab tam (kev sim tensile, kev sim cuam tshuam, kev sim hardness): txhawm rau xyuas lub zog, tawv, thiab qhov tawv ntawm cov yeeb nkab, kom ntseeg tau tias nws ua tau raws li daim ntawv thov. ③ Tsis yog- kuaj kev puas tsuaj (kev kuaj ultrasonic, kuaj hluav taws xob, kuaj cov khoom sib nqus): txhawm rau txheeb xyuas qhov tsis xws luag sab hauv thiab saum npoo (xws li cov kab nrib pleb, suav nrog, qhov) yam tsis muaj kev puas tsuaj rau cov yeeb nkab. ④ Dimensional soj ntsuam: txhawm rau xyuas cov kab sab nraud, sab hauv txoj kab uas hla, phab ntsa tuab, thiab qhov ncaj ntawm cov yeeb nkab, kom ntseeg tau tias nws ua tau raws li qhov yuav tsum tau ua. ⑤ Hydrostatic test: Txhawm rau ntsuas lub siab- cov kabmob muaj peev xwm thiab nruj ntawm cov yeeb nkab, kom ntseeg tau tias tsis muaj qhov xau raws li qhov ntsuas siab.
5. Cov kav dej seamless steel ntawm cov qib sib txawv tuaj yeem welded ua ke? Yuav tsum tau ceev faj dab tsi?
Yog lawm, seamless steel kav ntawm cov qib sib txawv tuaj yeem welded ua ke, tab sis yuav tsum tau ceev faj hauv qab no: ① Xaiv cov khoom siv vuam tsim nyog: cov khoom siv vuam (welding pas nrig, vuam hlau) yuav tsum tau sib haum nrog ob qib, thiab nws cov khoom siv kho mob thiab kev tiv thaiv corrosion yuav tsum nyob nruab nrab ntawm ob qib kom ntseeg tau tias cov vuam sib txuas muaj lub zog txaus thiab corrosion kuj. ② Kho cov txheej txheem vuam: Raws li cov tshuaj lom neeg muaj pes tsawg leeg thiab cov khoom siv kho tshuab ntawm ob qib, kho qhov vuam tam sim no, qhov hluav taws xob, vuam ceev, thiab kub ua ntej kom tsis txhob vuam tsis xws luag (xws li tawg, tsis tiav fusion). ③ Ua tom qab- vuam kev kho cua sov: Rau cov hlau alloy thiab stainless hlau kav, ncej- vuam kev kho cua sov (xws li tempering, tov kev kho) yog xav tau los tshem tawm vuam kev nyuaj siab, txhim kho lub toughness ntawm vuam sib koom tes, thiab tsis txhob intergranular corrosion. ④ Kev soj ntsuam nruj: Tom qab vuam, ua tsis yog - kuaj kev puas tsuaj thiab cov cuab yeej cuab tam ntawm cov vuam sib txuas kom ntseeg tau tias nws ua tau raws li daim ntawv thov.
