High-carbon steel yog hais txog carbon steel nrog w (C) siab tshaj 0.6%, uas muaj ib tug ntau dua nyiam harden dua medium-carbon steel, thiab cov ntaub ntawv high-carbon martensite, uas yog rhiab heev rau qhov tsim ntawm txias tawg.Nyob rau tib lub sijhawm, cov qauv martensite tsim nyob rau hauv thaj chaw uas muaj kev kub ntxhov ntawm vuam yog ib qho nyuaj thiab nkig, uas ua rau muaj kev txo qis hauv plasticity thiab toughness ntawm qhov sib koom ua ke.Yog li ntawd, lub weldability ntawm high-carbon steel yog heev tsis zoo, thiab ib tug tshwj xeeb welding txheej txheem yuav tsum tau saws los xyuas kom meej cov kev ua tau zoo ntawm kev sib koom tes..Yog li ntawd, nws yog feem ntau tsis tshua siv nyob rau hauv welded lug.Cov pa roj carbon ntau yog siv rau cov khoom siv tshuab uas yuav tsum tau ua kom muaj zog thiab hnav tsis kam, xws li cov ncej, lub zog loj thiab cov couplings.Yuav kom txuag tau cov hlau thiab ua kom yooj yim rau kev siv tshuab, cov tshuab no feem ntau ua ke nrog cov qauv welded.Vuam ntawm high carbon steel Cheebtsam kuj tau ntsib nyob rau hauv lub tshuab hnyav lub tsev.Thaum tsim cov txheej txheem welding ntawm high carbon steel welding, txhua yam ntawm vuam tsis xws luag uas yuav tshwm sim yuav tsum tau soj ntsuam tag nrho, thiab cov txheej txheem vuam cov txheej txheem yuav tsum tau ua.
1. Weldability ntawm high carbon steel
1.1 Vuam txoj kev
Cov pa roj carbon ntau yog siv rau hauv cov qauv uas muaj siab tawv thiab hnav tsis kam, yog li txoj kev vuam tseem ceeb yog electrode arc vuam, brazing thiab submerged arc vuam.
1.2 Cov khoom siv vuam
Vuam ntawm high carbon steel feem ntau tsis xav tau tib lub zog ntawm kev sib koom tes thiab cov hlau hauv paus.Tsawg-hydrogen electrodes nrog muaj zog desulfurization muaj peev xwm, tsawg diffusible hydrogen cov ntsiab lus ntawm deposited hlau, thiab zoo toughness yog feem ntau xaiv rau electrode arc vuam.Thaum lub zog ntawm cov hlau vuam thiab lub hauv paus hlau yog yuav tsum tau, ib tug tsawg-hydrogen electrode ntawm tus coj theem yuav tsum tau xaiv;Thaum lub zog ntawm cov hlau vuam thiab cov hlau tsis tas yuav tsum tau, ib qho hluav taws xob tsawg-hydrogen electrode nrog lub zog qis dua li ntawm cov hlau hauv paus yuav tsum tau xaiv.Ib qho electrode uas muaj lub zog siab dua li cov hlau hauv paus tsis tuaj yeem xaiv.Yog tias lub hauv paus hlau tsis raug tso cai rau preheated thaum vuam, txhawm rau tiv thaiv cov kab mob khaub thuas hauv thaj chaw uas muaj kev kub ntxhov, austenitic stainless hlau electrodes tuaj yeem siv kom tau txais cov qauv austenite nrog cov yas zoo thiab muaj zog tawg.
1.3 Kev npaj ntawm Groove
Txhawm rau txwv cov feem ntau ntawm cov pa roj carbon monoxide nyob rau hauv cov hlau vuam, cov fusion piv yuav tsum raug txo kom tsawg, yog li U-shaped lossis V-shaped grooves feem ntau yog siv thaum vuam, thiab kev saib xyuas yuav tsum tau saib xyuas kom ntxuav cov zawj thiab cov roj stains thiab xeb hauv 20mm ntawm ob sab ntawm qhov zawj.
1.4 Preheating
Thaum vuam nrog cov txheej txheem steel electrodes, nws yuav tsum tau preheated ua ntej vuam, thiab lub preheating kub yuav tsum tau tswj ntawm 250 ° C mus rau 350 ° C.
1.5 Interlayer ua
Rau multi-layer multi-pass welding, thawj pass siv me-inch electrodes thiab qis-tam sim no vuam.Feem ntau, lub workpiece yog muab tso rau hauv ib nrab ntsug welding los yog vuam pas nrig yog siv los ua viav vias tom qab, kom tag nrho cov tshav kub-cuam tshuam cheeb tsam ntawm lub hauv paus hlau yog rhuab nyob rau hauv ib tug luv luv lub sij hawm kom tau preheating thiab kub preservation los.
1.6 Kev kho cua sov tom qab vuam
Tam sim ntawd tom qab vuam, lub workpiece raug muab tso rau hauv lub qhov cub cua sov, thiab kev txuag cua sov yog nqa tawm ntawm 650 ° C rau kev ntxhov siab annealing.
2. Welding tsis xws luag ntawm high carbon steel thiab kev tiv thaiv kev ntsuas
Vim lub siab hardening nyiam ntawm high carbon steel, kub tawg thiab txias tawg yog nquag tshwm sim thaum vuam.
2.1 Kev tiv thaiv kev tiv thaiv thermal tawg
1) Tswj cov tshuaj muaj pes tsawg leeg ntawm weld, nruj me ntsis tswj cov ntsiab lus ntawm leej faj thiab phosphorus, thiab tsim nyog nce cov ntsiab lus ntawm manganese los txhim kho cov qauv vuam thiab txo kev sib cais.
2) Kev tswj qhov sib txawv ntawm qhov sib txawv ntawm qhov vuam, thiab qhov dav-rau-qhov sib piv yuav tsum loj dua me ntsis kom tsis txhob muaj kev sib cais hauv qhov nruab nrab ntawm qhov vuam.
3) Rau weldments nrog siab rigidity, tsim nyog welding tsis, tsim nyog vuam sib lawv liag thiab kev taw qhia yuav tsum tau xaiv.
4) Yog tias tsim nyog, ua kom sov ua ntej thiab ua kom txias qeeb los tiv thaiv qhov tshwm sim ntawm thermal tawg.
5) Ua kom cov alkalinity ntawm cov electrode los yog flux kom txo tau cov impurity cov ntsiab lus nyob rau hauv lub weld thiab txhim kho cov degree ntawm segregation.
2.2 Kev tiv thaiv kab mob khaub thuas.
1) Preheating ua ntej welding thiab qeeb txias tom qab vuam tuaj yeem tsis tsuas yog txo qhov hardness thiab brittleness ntawm tshav kub-cuam tshuam cheeb tsam, tab sis kuj ceev lub sab nraud diffusion ntawm hydrogen nyob rau hauv lub vuam.
2) Xaiv qhov kev ntsuas vuam tsim nyog.
3) Txais kev sib dhos tsim nyog thiab vuam ua ntu zus los txo qhov kev ntxhov siab ntawm cov pob qij txha welded thiab txhim kho lub xeev kev ntxhov siab ntawm weldments.
3 . Cov lus xaus
Vim muaj cov ntsiab lus carbon siab, siab hardenability thiab tsis zoo weldability ntawm siab carbon steel, nws yog ib qho yooj yim los tsim high carbon martensitic qauv thaum vuam, thiab nws yog ib qho yooj yim los tsim vuam tawg.Yog li ntawd, thaum welding high carbon steel, cov txheej txheem vuam yuav tsum raug xaiv kom tsim nyog.Thiab siv cov kev ntsuas sib xws hauv lub sijhawm los txo qhov tshwm sim ntawm vuam tawg thiab txhim kho kev ua haujlwm ntawm cov pob qij txha welded.
Post lub sij hawm: Lub Xya hli ntuj-18-2023