6. Secondary thiab tertiary xeev sawv cev txoj kev ntawm welded yeeb nkab xeev (W):
Tom qab lub vuam yog refined (re-annealing, re-txias ua hauj lwm), welded cheeb tsam tau dhau los ua ib tug txheej txheem txheej txheem thiab yuav siv tau raws li lub xeev txoj cai. Txoj kev sawv cev hauv xeev no siv O, OS, thiab H ua cov lej raws li qhov xwm txheej tshwj xeeb tom qab ua tiav.
Secondary xeev code thiab lub npe ntawm welded yeeb nkab xeev (W):
WM-welded xeev; WO-annealed xeev tom qab vuam; WC-lub teeb txias ua haujlwm tom qab vuam; WH-txias lub xeev tom qab vuam; WR-welded yeeb nkab + kos duab txias + kev ntxhov siab
Ntxiv ob tus lej Arabic tom qab lub xeev tus lej thib ob los ua tus lej thib peb hauv xeev. Cov hauv qab no yog cov lej thib peb thiab cov npe:
Cov lus saum toj no-hais txog ob tus lej Arabic 00, 01, 02, 03, 04, 06, 08, thiab 10 sawv cev rau lub xeev hardening, uas yog siv tau ntawm no.
Ob tus lej Arabic ntxiv tom qab TM yog: 50, 00, 01, 02, 03, 04, 06, 08, 10, 15, 20, 21, 22, 24, thiab peb theem txheej xwm txheej xwm thiab cov npe muaj raws li nram no:
TM50 - welded los ntawm annealed strip; TM00 - welded los ntawm 1/8 nyuaj strip; TM15 - welded los ntawm annealed strip + kev nyuaj siab nyem;
TM20 - welded los ntawm 1/8 nyuaj strip + kev ntxhov siab; TM21 - welded los ntawm 1/4 nyuaj strip + kev ntxhov siab;
TM22 - welded los ntawm 1/2 nyuaj strip + kev ntxhov siab; TM24 - welded los ntawm 3/4 nyuaj strip + kev ntxhov siab
Cov lej ob-tus lej Arabic ntxiv tom qab WO yog: 50, 60, 61, thiab peb-theem cov lej thiab cov npe muaj raws li hauv qab no:
WO - vuam + lub teeb annealing; WO60 - vuam + mos annealing; WO61 - welding + Annealing
Tus lej ob-tus lej Arabic ntxiv tom qab WC yog: 55, thiab nws peb-theem lub xeev code thiab lub npe yog WC55- vuam + lub teeb txias ua haujlwm
Ob tus lej Arabic tus lej ntxiv tom qab WH yog: 00, 01, 02, 03, 04, 06, 55, 58, 60, thiab nws peb-theem lub xeev code thiab npe piv txwv yog raws li nram no:
WH00- vuam + kos duab (1/8 nyuaj); WH55- vuam + txias dov lossis teeb duab; WH58- vuam + txias dov lossis cov duab kos duab; WH80-welding + txias dov lossis tawv tawv
Ob tus lej Arabic tus lej ntxiv tom qab WR yog: 00, 01, 02, 03, 04, 06, thiab nws peb-theem lub xeev code thiab lub npe piv txwv yog raws li nram no:
WR00- vuam + kos duab + kev ntxhov siab los ntawm 1/8 nyuaj strip; WR06-welding + kos duab + kev ntxhov siab los ntawm cov tawv tawv ntxiv
