5 kauj ruam ntawm hluav taws xob soldering hlau vuam
1. Preheating
Preheating yog qhov zoo rau kev txo qhov siab tshaj plaws hardness ntawm tshav kub cuam tshuam cheeb tsam ntawm nruab nrab carbon steel thiab tiv thaiv qhov tshwm sim ntawm txias tawg, uas yog lub ntsiab txheej txheem ntsuas rau vuam nruab nrab carbon steel. Preheating tuaj yeem txhim kho kev sib koom ua ke ntawm plasticity thiab txo qis kev ntxhov siab tom qab vuam. Feem ntau, preheating kub rau 35 thiab 45 steel yog nruab nrab ntawm 150 thiab 250 degree. Thaum cov ntsiab lus ntawm cov pa roj carbon monoxide siab los yog qhov kev sib tw yog qhov loj vim qhov tuab thiab nruj, qhov kub thiab txias tuaj yeem nce mus rau 250-400 degree .
Yog hais tias lub vuam thooj loj dhau lawm thiab muaj teeb meem nyob rau hauv tag nrho preheating, lub zos preheating yuav nqa tawm. Cov cua kub rau hauv zos preheating yog 150-200mm ntawm ob sab ntawm qhov sib txuas.
2. Weld pas nrig tej yam kev mob
Thaum tso cai, acidic vuam pas nrig yog nyiam.
3. Groove daim ntawv
Weld lub weldment kom ntau li ntau tau nrog U-shaped zawj. Yog hais tias nws yog ib qho tsis xws luag, cov duab ntawm qhov excavated groove yuav tsum du, nrog rau lub hom phiaj ntawm kev txo cov feem ntawm lub hauv paus hlau melting rau hauv cov hlau weld, thiaj li yuav txo tau cov pa roj carbon ntsiab lus nyob rau hauv lub weld thiab tiv thaiv qhov tshwm sim ntawm tawg.
4. txheej txheem tsis
Vim tias qhov kev faib ua feem ntawm lub hauv paus hlau melting rau hauv thawj txheej ntawm vuam hlau tuaj yeem ncav cuag li 30 feem pua, thaum welding thawj txheej ntawm vuam, nws raug nquahu kom siv qis tam sim no thiab qeeb vuam ceev kom ntau li ntau tau. txo qhov tob tob ntawm lub hauv paus hlau, uas yog feem ntau hu ua kub hnyiab (thaum tam sim no siab dhau lawm, lub hauv paus hlau yog hlawv).
5. Kev kho cua sov
Tom qab vuam, nws yuav tsum tau khaws cia ntawm qhov kub ntawm 200-350 degree rau 2-6 teev kom qeeb qeeb ntawm qhov txias txias, ua kom cov yas thiab tawv tawv, thiab txo cov nyiam tawv, tshem tawm cov diffusion ntawm hydrogen hauv kev sib koom. Yog li ntawd, welding yuav tsum tsis txhob ua nyob rau hauv qhov chaw txias heev los yog nyob rau hauv los nag. Nws yog qhov zoo tshaj plaws los ua tam sim ntawd kev ntxhov siab rau kev kho cua sov ntawm qhov chaw welded tom qab vuam, tshwj xeeb tshaj yog rau cov tuab welded qhov chaw, siab nruj cov txheej txheem, thiab weldments ua hauj lwm nyob rau hauv mob hnyav (dynamic los yog cuam tshuam loads). Lub tempering kub rau kev ntxhov siab tom qab vuam yog 600 ~ 650 degree, nrog rwb thaiv tsev rau 1-2 teev, thiab tom qab ntawd txias nrog lub qhov cub. Yog tias kev kho cua sov tsis tuaj yeem ua tiav tom qab vuam, tom qab kev kho cua sov yuav tsum tau nqa tawm tam sim ntawd.
Kev paub yooj yim ntawm cov txheej txheem vuam Vuam yog txheej txheem machining thiab txoj kev sib txuas uas siv cua sov, siab, lossis ob qho tib si los tsim atomic bonding ntawm ob lub workpieces. Vuam yog siv dav, ob qho tib si rau cov hlau thiab tsis yog hlau.
