Dab tsi yog qhov sib txawv ntawm Q345A, Q345B, Q345C, Q345D, thiab Q345E steels? Niaj hnub no, kuv yuav teev lawv rau koj.
Daim duab
Q345 yog ib hom khoom siv hlau. Nws yog ib co hlau qis (c<0.2%), which is widely used in buildings, bridges, vehicles, ships, pressure vessels, etc. Q represents the yield strength of this material, and the following 345 refers to the yield value of this material, which is about 345MPa. And the yield value will decrease with the increase of the thickness of the material.
Q345 muaj cov cuab yeej siv ib yam, siv tau qhov kub siv tau kev ua tau zoo, zoo huv thiab vinetability. Nws yog siv rau cov tso tsheb hlau luam nruab nrab thiab cov tso tsheb hlau roj roj, cov tsheb cranes, cov tshuab hluav taws xob, cov qauv siv hluav taws xob, kub lub xeev, thiab ua tau Siv rau ntau yam qauv nyob rau hauv cov chaw txias hauv qab no -40 degree.
Daim duab
Kev Qhia Qeb Qib
Q345 tuaj yeem faib ua Q345A, Q345B, Q345C, Q345D, thiab Q345E raws qib. Dab tsi lawv sawv cev tsuas yog qhov sib txawv ntawm qhov cuam tshuam kub.
Q345A txhais tau tias tsis cuam tshuam;
Q345b qib txhais tau tias 20 degrees qhov ntsuas kub thiab txias tshaj plaws;
Q345C qib txhais tau tias 0 degrees cuam tshuam;
Q345d qib txhais tau tias -20 degrees cuam tshuam;
Q345E txhais tau tias -40 degrees cuam tshuam.
Ntawm kev cuam tshuam sib txawv, qhov cuam tshuam tseem ceeb kuj txawv.
Daim duab
Tshuaj Muaj Tshuaj
Q345A: C Tsawg dua lossis sib npaug ntawm 0. 2 {, SI tsawg dua lossis sib npaug lossis sib npaug lossis sib npaug lossis sib npaug {9}}. {{{0 45, s Tsawg dua lossis sib npaug ntawm {13}}. 045, v 0.02 ~ 0.15;
Q345B: C Tsawg dua lossis sib npaug ntawm 0. 2 {, SI nqov lossis sib npaug lossis sib npaug lossis sib npaug ntawm { {9}}. {{{{{}} 4 {13 {13}}, s tsawg dua lossis sib npaug 0.22 ~ 0.15;
Q345C: C Tsawg dua lossis sib npaug ntawm 0. 2 {, SI tsawg dua lossis sib npaug lossis sib npaug lossis sib npaug rau { {9}}. {{{{}}}}}}}}}}}}}}}}}}}}}}}
Q345d: C Tsawg dua lossis sib npaug rau 0. 2 {, SI nqov lossis sib npaug lossis sib npaug lossis sib npaug {9}}. {{{{}}}}}}}, V 0.02 ~ 0.15, feem ntau dua los yog sib npaug rau 0.015;
Q345E: C Tsawg dua lossis sib npaug ntawm 0. 2 {, SI tsawg dua lossis sib npaug lossis sib npaug lossis sib npaug lossis sib npaug rau { {9}}. {{0}}}}}}}}}}}}.}}}}}}
Daim duab
Piv nrog 16mn
Q345 steel yog hloov rau cov hom qub ntawm 12mnn, 14mn, 18mn, 16mn thiab lwm yam hlau, tsis yog 16mn steel. Nyob rau hauv cov nqe lus ntawm tshuaj muaj kuab lom, 16mn thiab Q345 kuj txawv.
Tseem ceeb tshaj, muaj ntau qhov sib txawv ntawm cov pab pawg tuab ntawm ob tus hlau ua kom muaj zog, uas yuav tsis muaj kev cuam tshuam nrog cov ntaub ntawv uas pub muaj kev ntxhov siab. Yog li ntawd, nws tsis tsim nyog los thov kom muaj kev ntxhov siab rau Q345 hlau, thiab cov kev ntxhov siab uas tau rov txiav txim siab raws li qhov loj tshiab thickness groated.
Lub ntsiab tivthaiv lub caij sib piv ntawm Q345 cov hlau yog tib yam li ntawm xyoo ntawm 16MN hlau, qhov sib txawv yog tias v, thiab nb trace alloy cov ntsiab lus ntxiv. Ib qho me me ntawm V, Ti, thiab NB Alloy cov nplej tuaj yeem kho cov nplej ntawm cov hlau, thiab txhim kho cov khoom siv hluav taws xob zoo nkauj ntawm cov hlau.
Nws tseem yog vim qhov no uas cov tuab ntawm cov phaj steel tuaj yeem ua kom loj dua. Yog li, cov khoom siv neeg kho mob ua haujlwm ntawm Q345 yuav tsum zoo dua 16mn hlau, tshwj xeeb tshaj yog nws qhov kev ua tau zoo tshaj plaws tsis muaj nyob hauv 16mn steel. Cov kev ntxhov siab uas muaj kev ntxhov siab ntawm Q345 hlau me dua li ntawm 16mn hlau.
Daim duab
Daim duab
Kev sib piv sib piv
Q345D Seamless Yeeb Nkab Cov Khoom:
Lub zog tensile: {{{{{{{tau tawm los zog: ntau dua lossis sib npaug: ntau dua lossis sib npaug nrog 22
Q345b Seamless Yeeb Nkab Cov Khoom:
Tensile lub zog: {{{{{{{yauv muaj zog: ntau dua lossis sib npaug: ntau dua lossis sib npaug rau 21
Q345A Seamless Yeeb Nkab Cov Khoom:
Tensile lub zog: {{{{{{{yauv muaj zog: ntau dua lossis sib npaug: ntau dua lossis sib npaug rau 21
Q345C Seamless Yeeb Nkab Cov Khoom:
Lub zog tensile: {{{{{{{tau tawm los zog: ntau dua lossis sib npaug: ntau dua lossis sib npaug nrog 22
Q345E Seamless Cov Khoom Siv Hluav Taws Xob:
Lub zog tensile: {{{{{{{tau tawm los zog: ntau dua lossis sib npaug: ntau dua lossis sib npaug nrog 22
Daim duab
Cov khoom lag luam
Q345d steel piv nrog Q345a, B, C Hlau. Qhov kev sim ntsuas kub ntawm tsawg-kub cuam tshuam lub zog yog tsawg. Kev ua tau zoo. Tus nqi ntawm cov teeb meem siv tau qis dua li ntawm Q345a, B, thiab C.
Tus nqi lag luam siab tshaj li ntawm Q345a, B, thiab C.
Cov ntsiab lus ntawm Q345D: ① Nws yog tsim ntawm Q + Naj Npawb + Cov Cim Qis + Cov Cim Deoxidation Cov cim Deoxidation. Nws tus lej Steel yog ua ntej nrog "Q", uas sawv cev rau cov muaj txiaj ntsig ntawm cov hlau, thiab cov xov tooj hauv qab no sawv cev rau cov txiaj ntsig tus nqi hauv MPA. Piv txwv li, Q235 sawv cev rau cov qauv carbon cov hlau nrog cov txiaj ntsig tau (σS) ntawm 235MPA.
② Yog tias tsim nyog, tus lej Steel tuaj yeem ua raws cov cim qhia tau cov qauv qib zoo thiab tus thawj cuam tshuam Dazidation. Cov cim qib theem yog A, B, C, thiab D feem.
Deoxidation Txoj Kev Cim Qauv: F sawv cev rau cov kav hlau npau npau; b sawv cev rau semi-tua steel-z sawv cev rau cov hlau tua; TZ sawv cev rau cov hlau tshwj xeeb, thiab tua cov hlau tuaj yeem tsis muaj cai, uas yog, ob qho tib si z thiab tz tuaj yeem tsis muaj peev xwm. Piv txwv li, Q 235-} af sawv cev rau qib npau npau.
Cov hlau cov hlau rau cov hom phiaj tshwj xeeb, xws li tus choj steel, betc drawiling txoj kev sawv cev ntawm cov qauv roj carbon, tab sis ntxiv cov tsiaj ntawv qhia lub hom phiaj thaum kawg ntawm tus lej Steel.
Q345 (Tsawg Alloy Ke Lub Zog Loj Hlau) Online Experpts Cov Ntaub Ntawv
Daim duab
Khoom Taw Qhia
1. Cov tshuaj lom neeg muaj pes tsawg leeg ntawm Q345 yog raws li hauv qab (%):
Daim duab
2. Cov khoom siv tshuab ntawm Q345C muaj raws li hauv qab no (%):
Neeg Kho Tshuab Cov Kev Ua Haujlwm
Elongation (%)
Sim ntsuas kub 0 degree
Tensile Tuag MPA
Paib tau taw qhia mpa
Tus nqi
Ntau dua los yog sib npaug rau 22
Ntau dua los yog sib npaug rau 34
470-650
324-259
Thaum lub phab ntsa tuab yog nruab nrab ntawm 16-35 hli, σs loj dua lossis sib npaug nrog 325mpa; Thaum lub phab ntsa tuab yog nruab nrab ntawm {2}} mm, σs loj dua los yog sib npaug rau 295mpa
2. Vuam cov yam ntxwv ntawm Q345 Hlau
2.1 Xam ntawm cov roj carbon sib npaug (CEQ)
Ceq=C + MN / {{}}}}} mo / {v / 5
Xam CEQ {{{0}}}. 49%, uas ntau dua 0.45%. Nws tuaj yeem pom tau tias qhov kev ua tau zoo ntawm Q345 tsis yog qhov zoo heev, thiab cov txheej txheem nruj heev yuav tsum tau tsim cov qauv hauv vuam.
2.2 Cov teeb meem uas nquag tshwm sim hauv Q345 Steel Vuam
2.2.1 Qhov ua nyuaj ntawm qhov chaw cuam tshuam kub-cuam tshuam
Thaum lub sij hawm txias cov txheej txheem ntawm thaj chaw, qhov kub-cuam tshuam los ua cov qauv quenching-martension, uas ua rau thaj chaw ze ntawm-ntug thiab txo cov plasticity. Raws li qhov tshwm sim, cov kab nrib pleb tshwm sim tom qab vuam.
2.2.2 Cov Khaub Ncaws Txias Khaub Ncaws
Lub vuam cracks ntawm Q345 hlau yog feem ntau txias nrib pleb.
Vuam kev ua haujlwm
Groove Kev Npaj Welding → Preheating → Sab Hauv Vuam → Rov los Kev Kho Tus Kheej (Weld Kev Tiv Thaiv Kub (Weld Zoo Ua Ntej )
Xaiv Kev Xaiv Wrding Txheej Txheem Tsis
Los ntawm Weldability tsom xam ntawm Q345 hlau, ntsuas hauv qab no yog tsim:
1. Xaiv cov khoom siv vuam
Vim tias qhov loj ntawm kev tawg txias ntawm Q345 hlau, tsawg-hydrogen vuam cov ntaub ntawv yuav tsum tau xaiv. Nyob rau tib lub sijhawm, xav txog lub hauv paus ntsiab lus uas Welded sib koom tes yuav tsum muaj zog raws li cov niam txiv cov khoom, E5015 (J507) hom vuam tau xaiv.
Tshuaj lom neeg muaj pes tsawg leeg tau qhia hauv cov lus hauv qab (%):
Ntsiab lus
C
Mn
Si
S
P
Cr
Mo
V
Ti
Zoo siab
0.071
1.11
0.53
0.009
0.016
0.02
0.01
0.01
0.01
Cov cuab yeej kho tshuab tau pom hauv cov lus hauv qab no:
σB / MPA
σS / MPA
δ5 (%)
Ψ (%)
AKV / J -30 degree
440
540
31
79
164/114/76
(Tensile lub zog yuav tsum muaj ntau dua li tau los)
2. Groove daim ntawv: (muab cov duab thiab khoom siv)
3. Kev sib tw txujci: phau ntawv arc vuam (d).
4. Vuam tam sim no: Txhawm rau kom tsis txhob muaj cov qauv weld qauv thiab cov kev txo qis ntawm kev cuam tshuam cov tawv ntoo, vuam me me yuav tsum tau saws. Cov kev ntsuas tshwj xeeb yog: Xaiv cov kab laum me me vuam qws, cov txheej txheem weld, cov txheej txheem sib tw nyias nyias thiab ntau cov vuam yog qhia hauv daim duab 1). Qhov dav ntawm Weld tsis ntau tshaj 3 lub sij hawm ntawm vuam pas nrig, thiab cov tuab ntawm lub weld txheej tsis ntau tshaj 5 hli. Qhov thib ib rau peb txheej txheej siv ф3.2 vuam rods nrog lub vuam tam sim no ntawm {8}} a; Plaub txog rau qib rau txheej siv ф4. {0 vuam rods nrog lub vuam tam sim no ntawm {}} a.
5. Piv txwv li ntawm CEQ ntawm Q345 hlau yog> 0}}}}}}} 400 degree.
6. Tom qab Weld kev kho kom sov: txhawm rau txo cov qauv kev sib cav sib ceg, txo cov qauv hydrogen hauv Weld, yuav tsum tau kho cov weld, weld yuav tsum tau kho tshav ntuj tom qab vuam. Kev kho cua sov kub yog: {{{{{}} lub sijhawm muaj hnub nyoog yog 40 hli), thaum lub caij nplooj zeeg thiab poob / h.
Ntawm chaw welding
1. Preheating ua ntej vuam
Ua ntej vuam lub ntsej muag flange, thawj zaug ua ntej lub flange phaj, thiab pib vuam tom qab txias tas li 30 feeb. Lub preheating, interlayer ntsuas kub, thiab kho cua sov ntawm kev kho cua sov cov txee, microcomputer txiav, thiab thermocouples ntsuas kub. Thaum lub sij hawm preheating, ntsuas ntsuas ntawm thermocouple yog 15mm {3}} hli nyob deb ntawm ntug ntawm lub zawj.
2. VUAM
2.1 Txhawm rau tiv thaiv vuam deformation, txhua kem sib koom ua ke yog welded symmetrically los ntawm ob tus neeg, thiab kev taug kev yog los ntawm nruab nrab rau ob sab. Thaum vuam lub qhov ncauj sab hauv (puab txoj kev zawj nyob ze rau lub vev xaib yuav tsum siv cov haujlwm me me, vim tias nws lub ntsiab vuam, vim tias nws lub ntsiab vuam yog qhov tseem ceeb ua rau muaj vuam deformation. Tom qab vuam ib mus rau peb txheej, sab nraub qaum yog ntxuav. Tom qab cov pa roj arc Air Planer yog siv los ntxuav lub hauv paus, poldd yuav tsum tau ntxuav cov duab carburized thiab tiv thaiv lub ntsej muag los ntawm kev ua kom ntau carbonized thiab ua rau tawg. Lub qhov ncauj sab nraud yuav tsum welded ib zaug, thiab tom qab ntawd tseem tshuav ntawm sab hauv lub qhov ncauj yuav tsum welded.
2.2 Thaum vuam ob zaug txheej, lub ntsej muag vuam yuav tsum rov qab los rau thawj txheej, thiab lwm yam. Txhua txheej txheej ntawm vuam sib koom ua ke yuav tsum yog staggered los ntawm {2}} hli.
2.3 Lub vuam tam sim no, vuam ceev thiab tus naj npawb ntawm v hlau txheej ntawm ob lub welders yuav tsum muaj sib xws.
2.4 Thaum lub sij hawm vuam, vuam yuav tsum pib los ntawm arc pib phaj thiab xaus ntawm lub arc kaw phaj. Tom qab vuam, txiav nws tawm thiab txhuam nws huv.
3. Post-Weld Kev Kho Mob Cua sov: Tom qab Weld tiav lawm, kev kho cua sov yuav tsum tau nqa tawm hauv 12 teev. Yog tias kev kho cua sov tsis tuaj yeem nqa tawm hauv lub sijhawm, rwb thaiv tsev thiab kev ntsuas qeeb yuav tsum tau ua. Thaum kev kho cua sov, ob lub thermocoes yuav tsum tau siv rau kev ntsuas kub, thiab cov thermocoterles yuav tsum yog chaw welded sab hauv thiab sab nraud ntawm Weld.
4. Vuam Soj Ntsuam
Raws li cov cai ntawm "steel qauv engineering kev tsim kho thiab cov cai lees paub", hom Welds tau nrhiav kom tau, thiab kev soj ntsuam piv yog 100%.
On-Site Kev Tswj Xyuas
1. Npaj vuam vuam kev ua haujlwm cov lus qhia.
2. Kev tswj cov txheej txheem vuam thoob plaws hauv cov txheej txheem yog qhov tseem ceeb ntawm kev ua tau zoo.
Thaum vuam ib sab sib koom ua ke, tus neeg mob siab yuav tsum saib xyuas cov txheej txheem vuam. Yog tias tus tswv cuab tsis ua raws li cov lus qhia ua haujlwm, yuav tsum nres vuam yuav tsum nres tam sim ntawd. Thaum lub sij hawm vuam, cov neeg ua haujlwm kho cua sov yuav tsum saib xyuas qhov cuam tshuam kub thoob plaws hauv cov txheej txheem. Yog tias nws tshaj tus qauv, cov kws cuab yuav tsum tau ceeb toom kom nres tam sim ntawd.
3. Txhim kho qhov zoo ntawm kev tsim kho cov neeg tsim kho yog tus yuam sij rau kev siv cov txheej txheem vuam
Ua ntej kev tsim kho, txhua tus neeg ua haujlwm yuav tau qhia luv luv thiab daim npav tsim qauv yuav qhib. Cov lus qhia luv luv piav qhia txog cov yam ntxwv ntawm cov txheej txheem vuam thiab cov kev tsim nyog thiab tswj cov ntsiab lus tswj hwm cov txheej txheem vuam.
Tag
Raws li cov kab txheem vuam no ntsuas, tag nrho ntawm 102 Welds tau welded rau ntawm qhov chaw, thiab tsis tshawb xyuas tus nqi uas ua rau 100% nyob rau ib zaug. Tom qab cov ntaub ntawv pov thawj hauv kev tsim kho tiag tiag, qhov kev tsim vuam no tsis tuaj yeem coj cov vuam ntawm Q345 hlau rau ntawm qhov chaw, tab sis kuj tseem ua kom lub vuam zoo.
