Dhuumaha Biraha Kaarboon Kaarboon ee Dabiiciga ah ee Tuubbada Khadka Biyaha
1. Fahmo dhuumaha birta kaarboonka ah ee alxanka leh ee wareegsan:
Dhuumaha birta kaarboonka ah ee alxanka lehayaa si tartiib ah u samaysmay oo laga alxanayaa gariiradaha birta ah. Habka wax-soo-saarka gaarka ah wuxuu ka dhigayaa tuubooyinkan mid xooggan oo aad u adkeysi badan, awood u leh inay u adkeystaan cadaadiska sare ee gudaha iyo dibadda. Awoodda iska caabinta daxalka iyo qallafsanaanta ayaa sidoo kale ka dhigaysa mid ku habboon codsiyo badan oo kala duwan, oo ay ku jiraan tuubooyinka biyaha iyo alxanka tuubooyinka birta.
Heerka | Heerka birta | Halabuurka kiimikada | Guryaha xamaasada | Tijaabada Saamaynta Charpy iyo Hoos u Dhigista Imtixaanka Ilmada | ||||||||||||||
C | Si | Mn | P | S | V | Nb | Ti | CEV4) (%) | Rt0.5 Mpa Xoog dhalid | Xoogga Tensile Rm Mpa | Rt0.5/ Rm | (L0=5.65 √ S0) Kordhinta A% | ||||||
max | max | max | max | max | max | max | max | Mid kale | max | min | max | min | max | max | min | |||
L245MB | 0.22 | 0.45 | 1.2 | 0.025 | 0.15 | 0.05 | 0.05 | 0.04 | 1) | 0.4 | 245 | 450 | 415 | 760 | 0.93 | 22 | Tijaabada Saamaynta Dabiiciga ah: Saamaynta nuugista tamarta tuubada iyo tollaynta alxanka waa in la tijaabiyaa sida loogu baahan yahay heerka asalka ah. Faahfaahinta, eeg heerka asalka ah. Tijaabada jeexjeexa miisaanka: Aagga xiirida ee ikhtiyaarka ah | |
GB/T9711-2011 (PSL2) | L290MB | 0.22 | 0.45 | 1.3 | 0.025 | 0.015 | 0.05 | 0.05 | 0.04 | 1) | 0.4 | 290 | 495 | 415 | 21 | |||
L320MB | 0.22 | 0.45 | 1.3 | 0.025 | 0.015 | 0.05 | 0.05 | 0.04 | 1) | 0.41 | 320 | 500 | 430 | 21 | ||||
L360MB | 0.22 | 0.45 | 1.4 | 0.025 | 0.015 | 1) | 0.41 | 360 | 530 | 460 | 20 | |||||||
L390MB | 0.22 | 0.45 | 1.4 | 0.025 | 0.15 | 1) | 0.41 | 390 | 545 | 490 | 20 | |||||||
L415MB | 0.12 | 0.45 | 1.6 | 0.025 | 0.015 | 1)2)3 | 0.42 | 415 | 565 | 520 | 18 | |||||||
L450MB | 0.12 | 0.45 | 1.6 | 0.025 | 0.015 | 1)2)3 | 0.43 | 450 | 600 | 535 | 18 | |||||||
L485MB | 0.12 | 0.45 | 1.7 | 0.025 | 0.015 | 1)2)3 | 0.43 | 485 | 635 | 570 | 18 | |||||||
L555MB | 0.12 | 0.45 | 1.85 | 0.025 | 0.015 | 1)2)3 | Gorgortanka | 555 | 705 | 625 | 825 | 0.95 | 18 | |||||
Fiiro gaar ah: | ||||||||||||||||||
1) 0.015 ≤ Altot | ||||||||||||||||||
2) V+Nb+Ti ≤ 0.015% | ||||||||||||||||||
3) Dhammaan darajooyinka birta, Mo laga yaabaa ≤ 0.35%, hoos yimaada qandaraas. | ||||||||||||||||||
Mn Cr+Mo+V Cu+Ni 4) CEV=C+6+5+5 |
2. Tuubooyinka khadka biyaha:
Nidaamyada qaybinta biyaha, gaarsiinta badbaadada iyo waxtarka leh ee biyaha nadiifka ah waa muhiim. Tuubbada birta kaarboonka ee welded ee spiral ayaa la caddeeyey inay tahay doorasho lagu kalsoonaan karo oo loogu talagalay tuubooyinka biyaha sababtoo ah sifooyinkeeda u adkaysta daxalka. Dusha siman ee tuubooyinkani waxay yaraynaysaa is jiid jiidka, hubinta socodka joogtada ah ee biyaha iyo yaraynta qaska. Intaa waxaa dheer, xoogga dabiiciga ah iyo cimri dhererka ayaa dammaanad qaadaya ka hortagga daadinta, dillaacyada, iyo burburka qaabdhismeedka, hubinta sii socota, bixinta biyo la isku halleyn karo.
3. Alxanka tuubooyinka birta:
Warshadaha alxanka waxay si aad ah ugu tiirsan yihiin dhuumaha birta kaarboonka ee alxanka leh si ay u helaan codsiyo kala duwan. Xoogga gaarka ah iyo dabacsanaanta tuubooyinkan ayaa ka dhigaya kuwo ku habboon alxanka tuubooyinka birta. Haddi la dhiso haamaha kaydinta waaweyn, dhuumaha lagu qaado saliida iyo gaaska, ama qaybaha qaab dhismeedka goobaha warshadaha, tuubooyinka birta kaarboonka ee alxanka leh ayaa door muhiim ah ka ciyaara. Isku-duubnaanta kala-goysyada alxanka ah waxay hubisaa kalsoonida iyo badbaadada qaab-dhismeedka, yaraynta baahida dayactirka ama dayactirka joogtada ah.

4. Faa'iidooyinka iyo faa'iidooyinka:
4.1 Xalka wax ku oolka leh: Tuubbooyinka birta ee kaarboonka ee spiral welded wuxuu bixiyaa xal kharash-ku-ool ah oo loogu talagalay tuubooyinka biyaha iyo alxanka tuubooyinka birta. Adkeysigooda iyo iska caabbinta daxalka waxay xaqiijinayaan nolol adeeg oo dheer, sidaas darteed hoos u dhigista kharashka beddelka iyo dayactirka.
4.2 Si fudud loo rakibo: Tiknoolajiyada alxanka wareega ee loo isticmaalo habka wax soo saarka ayaa soo saari kara tuubooyin dheer oo joogto ah, yaraynta baahida kala-goysyada soo noqnoqda. Naqshaddan la hagaajiyay ayaa fududaynaysa habka rakibidda, badbaadinta wakhtiga iyo dadaalka.
4.3 Kala duwanaansho: Tuubbooyinka birta kaarboonka ee spiral welded waxaa laga heli karaa dhexroor iyo dhumucyo kala duwan, taas oo u oggolaanaysa in ay la qabsadaan codsiyada kala duwan. Waxa loo habayn karaa si ay u buuxiyaan shuruudaha mashruuca ee gaarka ah, iyaga oo la qabsanaya dareeraha kala duwan, cadaadiska iyo heerkulka.
4.4 Ilaalinta deegaanka: Birta kaarboonku waa shay dib loo warshadayn karo oo gacan ka geysta sii jirista deegaanka. Tuubooyinka birta ee kaarboonka ah ee alxanka leh ayaa dib loo warshadayn karaa oo dib loo isticmaali karaa, yaraynta qashinka iyo ilaalinta khayraadka dabiiciga ah.
Gabagabadii:
Awoodaha iyo faa'iidooyinka ay leeyihiin tuubooyinka birta kaarboonka ee alxanka leh ee tuubooyinka biyaha iyoalxanka tuubooyinka birtalama dhayalsan karo. Wareejinta wax ku oolka ah ee lagu kalsoonaan karo ee biyaha iyo dareeraha warshadaha waxay si weyn ugu tiirsan yihiin cimrigooda, caabbinta daxalka iyo fududaynta rakibidda. Maaddaama baahida loo qabo kaabayaal xooggan oo kharash-ool ah ay kor u sii kacayso, tuubooyinka birta kaarboonka ee isbiirsaday waxay ahaan doonaan qayb muhiim ah oo lagu hubinayo habsami u socodka nidaamka biyaha iyo hababka warshadaha ee adduunka oo dhan.