Cov ua rau weld tsis ua haujlwm thiab kev tsim kho?
Causes include: welding speed is too fast (>30m \/ min), Groove Angle yog tsawg (<30°), misalignment is >1 hli lossis vuam sib txawv. Kev txhim kho kev ntsuas: txo cov vuam ceev rau 15-20 m \/ min, nce zawj rau 45 degree, thiab nruab cov txheej txheem laser. Erw Welded Pipes yuav tau kuaj xyuas cov kev cuam tshuam loj, thiab pom cov kav dej welded yuav tsum tau hloov kho cov hlau txuas ntev. Kev tu cov menyuam yaus tsis tu ncua ntawm cov menyuam oxides kuj tseem tuaj yeem pab txhim kho kev fusion.
Yuav ua li cas kho cov menyuam thaum lub ovality ntawm welded cov yeeb nkab tshaj?
Thawj ntsuas cov kev taw qhia ellipical. Yog tias cov Axis loj yog nyob rau hauv cov kev taw qhia ntsug, cov menyuam kab rov tav yuav tsum tau hloov kho sab saud; Txwv tsis pub, nws yuav tsum tau hloov kho hauv qab. Tus nqi hloov kho yog raws li tus nqi empirical ntawm {0}}}}. 3 hli yob sib txawv hloov. Cov tshooj lus tau xaus yuav tsum khaws cov decelteration tus nqi ntawm txhua qhov kev khiav raws li (feem ntau 10% {5}}%). Rau kauv welded kav dej, tus tsim lub kaum sab xis (feem ntau 45 degree {{{}} kab deg qhov siab yuav tsum tau kuaj. Laser taub yog lub taub hau gauge cov tswv yim tswj kev tswj tau tuaj yeem siv online rau kev hloov kho kev hloov kho.
Yuav ua li cas thiaj paub qhov sib txawv kub cov kab nrib pleb ntawm cov kab nrib pleb txias hauv vuam?
Cov kab nrib pleb kub tshwm sim thaum lub sijhawm sib cais (saum ntuj 142 {{{{}}}} degree), tau faib raws cov lead ua, thiab muaj cov xim oxidized rau saum npoo; Cov kab nrib pleb txias tshwm sim hauv qab 200 degree, txuas ntxiv los ntawm cov siv lead ua, thiab tsis muaj cov kab mob oxidation. Cov kab nrib kub feem ntau yog tshwm sim los ntawm cov leej faj-phosphorus saws taw lossis cov kab nrib pleb tsawg yog tshwm sim los ntawm hydrogen embrittlement lossis residual kev ntxhov siab lossis muaj kev ntxhov siab. Txhawm rau tiv thaiv cov kab nrib pleb kub, s tsawg dua lossis sib npaug rau 0.0% yuav tsum tau tswj, thiab cov kab nrib txias yuav tsum tau preheating (xws li 150 degree kom tshem hydrogen.
Yuav ua li cas tiv thaiv zinc nodules rau saum npoo ntawm galdanized welded kav?
Zinc Nodules yog tshwm sim los ntawm kev ua kua kub ntau dhau Txoj Kev Npaj Txhim Kho: Tswj cov zinc kua kub thaum {2}} degree, thiab ntxiv 0.02% los txo cov hlau-zinc cov tshuaj tiv thaiv. Cov cua rab riam siab yog kho rau 1-2 KPA, thiab lub kaum sab xis yog 15 degree rau cov yeeb nkab rau tshuab. Ua kom huv si pickle (hcl concelration 15% -20%) thiab pab plating (zncl₂ + nh₄cl) ua ntej plating. Rau cov kav dej nrog zinc nodules, zom nrog ib txoj kev sib tsoo thiab tom qab ntawd tsuag zinc xim.
Yuav ua li cas txheeb "pseudo-puas" cov cim hauv ultrasonic sim?
Cov cim tsis tseeb yuav los ntawm Coupling Tus Neeg Sawv Cev Npuas (Random Disperible), oxide daim tawv nqaij reflections (txoj hauj lwm ntsuas) lossis tsos mob). Cov cim tsis zoo: Cov tshuaj yej hloov pauv tsis tu ncua thaum lub sij hawm nthwv dej nrawm yog ruaj khov thaum lub sijhawm kuaj pom zoo li cas. Siv ntau-lub qub teg num (xws li 45 degree +70}} degree) rau kev pom zoo rau cov kev cuam tshuam rau kev tshem tawm. Cov khoom siv ultrasonic tuaj yeem lim suab nrov los ntawm DAC nkhaus.
