Hauv kev ua haujlwm txhua hnub ntawm lub tsev hlau lossis qhov chaw tsim kho, kev kuaj xyuas qhov nyuaj yog ntau dua li kev kuaj xyuas ib txwm muaj - nws yog txoj hauv kev ceev tshaj plaws los xyuas seb lub yeeb nkab puas haum rau lub hom phiaj. Txawm koj tab tom tshuaj xyuasLSAW rau ib txoj kab siab lossiscov seem khoobrau lub thav duab chaw ntau pob, qhov nyuaj qhia koj meej tias cov hlau tau kho li cas thiab nws yuav ua li cas thaum muaj kev ntxhov siab.
Nov yog qhov tseeb txog kev ntsuas peb li cas thiab vim li cas nws thiaj tseem ceeb rau koj cov nyiaj tau los.
Daim Duab 1.Kev kuaj xyuas qhov nyuaj ntawm cov yeeb nkab carbon hauv peb lub chaw kuaj mob.
Vim Li Cas Peb Thiaj Tsis Txhob Tsis quav ntsej txog qhov nyuaj
Qhov tawv tsis yog hais txog kev tiv thaiv ntawm qhov chaw xwb; nws yog ib txoj hauv kev "luv luv" uas tsis ua rau puas tsuaj rau kev nkag siab txog lub zog ntawm lub yeeb nkab.
Kev Kwv Yees Lub Zog:Muaj kev sib txuas ncaj qha, kab ncaj nraim ntawm qhov nyuaj thiab lub zog tensile (Rm). Hauv daim teb, peb feem ntau siv txoj cai ntawm tus ntiv tes xoo Rm≈ 3.45 × HB kom tau txais kev kwv yees lub zog sai yam tsis tas yuav tsum tau kuaj tensile tag nrho.
Kev ntes cov yuam kev kho cua sov:Yog tias ib pawg ntawm ASTM A106 yuav tsum tau ua kom zoo li qub tab sis tawm los nyuaj dhau, qhov kev sim qhia tau hais tias qhov txias txias tsis zoo lossis qhov kub ntawm lub cub tawg tsis sib npaug.
Qhov "Txuas Tsis Muaj Zog Tshaj Plaws" (Welds):Hauv cov kav dej vuam zoo li ERW lossis SSAW, Thaj Chaw Kub Cuam Tshuam (HAZ) yog thaj chaw txaus ntshai. Yog tias thaj chaw no tawv dhau, nws yuav tawg yooj yim. Hauv roj thiab roj "kev pabcuam qaub ncaug," qhov vuam tawv dhau yog lub hlau nplaum rau Hydrogen-Induced Cracking (HIC).
Peb Yam Loj: Koj Yuav Tsum Siv Txoj Kev Twg?
1. Brinell (HBW) - Zoo tshaj plaws rau cov khoom siv ntau
Rau cov phaj hlau nyoos thiab cov kav dej tuab, Brinell yog tus qauv kub. Nws siv lub pob tungsten carbide 10 hli thiab lub nra hnyav (txog li 3000kg).
Vim li cas nws thiaj ua haujlwm:Qhov kev nkhaus loj ua rau cov qauv ntawm cov hlau nruab nrab, ua rau koj nyeem tau "ntau" es tsis yog qhov txawv txav hauv zos.
Tus Qauv:
2. Rockwell (HRB/HRC) - Tus Vaj Ntxwv Tsim Khoom
Yog tias koj xav tau cov txiaj ntsig hauv vib nas this ntawm kab ntim ntau, Rockwell yog cov lus teb. Nws yog txoj kev nyeem ncaj qha uas tsis tas yuav ntsuas qhov muag.
HRB:Zoo tagnrho rau cov hlau tsis muaj zog xws li Q235.
HRC:Tsim nyog rau cov hlau kav dej muaj zog heev (xws li API 5L X70) lossis cov khoom uas tau quenched.
3. Vickers (HV) - Tus Kws Tshawb Fawb Txog Kev Ntsuas Kub
Vickers siv lub pob zeb diamond pyramid thiab feem ntau yog tseg rau kev kuaj mob. Yog tias koj xav tau daim ntawv qhia qhov nyuaj ntawm qhov vuam nqaim kom nrhiav tau qhov chaw tseeb uas cov hlau tau tawg yooj yim, Vickers yog tib lub cuab yeej rau txoj haujlwm.
Cov Lus Qhia Txog: Qhov Nyuaj Siab Raws Li Qib
Txawm hais tias cov nqi MTR (Daim Ntawv Qhia Txog Kev Ntsuas Zeb) txawv, ntawm no yog cov qauv uas peb nrhiav hauv cov qib sib xws:
| Qib | Sib npaug thoob ntiaj teb | Qhov ntau yam (HBW) | Daim Ntawv Thov Ib Txwm Muaj |
| Q235B | ASTM A36 / S235 | 120 – 160 | Kev siv cov qauv txheem |
| Q355B | S355 / ASTM A572 | 150 – 200 | Cov qauv siab-load |
| API 5L X65 | ISO 3183 | 190 – 240 | Cov kav dej siab |
Lub Tswv Yim Zoo: Rau H2S "kev pabcuam qaub ncaug" ib puag ncig, NACE MR0175 cov qauv nruj me ntsis txwv qhov nyuaj ntawm22 HRC (kwv yees li 248 HV)kom tiv thaiv kev ntxhov siab corrosion cracking.
Tsis Txhob Siv Cov Ntaub Ntawv Phem: Cov Cai ntawm Kev Ntsuas Hauv Tebchaws
Yuav kom tau txais qhov tshwm sim uas sawv ntsug rau kev tshuaj xyuas, koj yuav tsum tswj cov hloov pauv:
1.Tua cov txheej:Koj tsis tuaj yeem sim ib qhoyeeb nkab galvanizedlos ntawm cov zinc. Zinc yog mos thiab yuav ua rau koj qis qis. Koj yuav tsum zom qhov chaw mus rau lub hauv paus hlau.
2.Saib qhov tuab:Yog tias koj phab ntsa nyias, qhov "anvil effect" (qhov nyuaj ntawm lub tshuab txhawb nqa) yuav nkag mus rau hauv koj qhov tshwm sim. Koj phab ntsa yeeb nkab yuav tsum tuab tsawg kawg 10 npaug ntawm qhov tob ntawm qhov indentation.
3.Nco ntsoov qhov sib nrug:Tsis txhob muab koj cov kev xeem sib sau ua ke. Txhua qhov kev ntaus ua rau cov hlau nyob ib puag ncig nws khov kho. Khaws koj cov ntsiab lus xeem tsawg kawg yog 3 txoj kab uas hla kom nyeem tau huv si thiab ywj pheej.
Kev kuaj qhov tawv yog koj txoj kev tiv thaiv tseem ceeb tiv thaiv kev puas tsuaj ntawm cov khoom siv. Los ntawm kev xaiv txoj kev zoo—Brinell rau lub zog loj, Rockwell rau kev ceev, lossis Vickers rau kev tshuaj xyuas kev sib txuas ua ke—koj ua kom ntseeg tau tias koj cov yeeb nkab carbon steel ua tau raws li cov qauv kev nyab xeeb ntawm kev tsim kho niaj hnub no.
Lub sijhawm tshaj tawm: Lub Peb Hlis-09-2026
