npuas
Npuas feem ntau tshwm sim nyob rau hauv nruab nrab ntawm lub weld hlaws, qhov twg hydrogen tseem nyob rau hauv lub weld hlau nyob rau hauv daim ntawv ntawm npuas. Lub hauv paus yog vim li cas rau qhov no muaj xws li ya raws ntawm qhov chaw ntawm vuam hlau thiab flux, uas yog siv yam tsis tau ziab ua ntej. Tsis tas li ntawd, siv cov vuam tsis tshua muaj tam sim no lossis qhov vuam ceev heev tuaj yeem ua kom cov hlau khov kho, ua rau cov npuas.
Undercut
Undercut yog hais txog V-shaped zawj uas tshwm nyob rau ntawm ntug ntawm cov hlaws hlaws nyob nruab nrab ntawm txoj kab weld. Qhov teeb meem no feem ntau tshwm sim vim qhov tsis tsim nyog vuam xws li vuam ceev, tam sim no, thiab voltage. Ntawm cov no, qhov vuam ceev nrawm heev yuav ua rau qis dua li qhov tsis zoo tam sim no.
Kub Cracking
Kub tawg yog tshwm sim thaum lub weld kev nyuaj siab siab los yog thaum lub silicon (Si) cov ntsiab lus nyob rau hauv weld hlau yog siab heev. Lwm hom kub cracking yog sulfur cracking, uas tshwm sim thaum lub billet yog tsim los ntawm ib tug phaj uas muaj zog sulfur segregation (tshwj xeeb rau cov mos rimmed steel). Thaum lub sij hawm welding, sulfides nkag mus rau hauv cov hlau welding, ua rau kev tsim cov kab nrib pleb.
Kev nkag mus tsis txaus
Kev nkag mus tsis txaus yog hais txog qhov tsis txaus sib tshooj ntawm cov hlau sab hauv thiab sab nraud, qee zaum ua rau tsis tiav fusion.
Txoj kev suav rau Welded Pipes:
Welded Yeeb Nkab Qhov hnyav suav (ib meter, hauv kilograms):
(Ob txoj kab uas hla - Phab ntsa Thickness) * Phab ntsa Thickness * 0 02466=Qhov hnyav ntawm Welded yeeb nkab ib Meter (kg)
Galvanized Yeeb Nkab Qhov hnyav suav (ib meter, hauv kilograms):
(Ob txoj kab uas hla - Phab ntsa Thickness) * Phab ntsa Thickness * 0.02466 * 1.06=Qhov hnyav ntawm Galvanized yeeb nkab ib Meter (kg)
Lus Cim: Qhov tseem ceeb 1.06 hauv kev suav cov yeeb nkab galvanized rau qhov hnyav ntxiv ntawm zinc txheej.
