Woyɔa nuteɖeamedzi ememetɔ si nɔa anyi le welding ƒe nuwuwu kple fafa blibo megbe be welding residual stress. Woda welding residual stresses ɖe hatsotso siwo gbɔna me:
1. Le nusi gbɔ nuteɖeamedzi tsona nu .
(1) Dzoxɔxɔ ƒe nuteɖeamedzi: Welding nye dzoxɔxɔ kple fafa ƒe ɖoɖo si mesɔ o. Dzoxɔxɔ si mesɔ o kple dzoxɔxɔ ƒe vovototo si mesɔ o, si woyɔna hã be dzoxɔxɔ ƒe nuteɖeamedzi, koŋue hea nuteɖeamedzi si le ʋuƒoa me vɛ.
(2) Mɔxexeɖedɔléle nu ƒe nuteɖeamedzi: Woyɔa nuteɖeamedzi si xɔtuɖoɖoa ŋutɔ alo gotagome mɔxexe ɖe enu koŋ he vɛ be mɔxexeɖedɔléle nu ƒe nuteɖeamedzi.
(3) Phase transformation stress: Woyɔa nuteɖeamedzi si koŋ tso microstructure ƒe tɔtrɔ si mesɔ o le welded joint area me be phase transformation stress, si woyɔna hã be microstructure stress.
(4) Nuteɖeamedzi si me haidrodzin le si me haidrodzin le: Woyɔa nuteɖeamedzi si tso hydrogen si kaka ɖe nusuekpɔmɔ̃ me ƒe ƒuƒoƒo koŋ be hydrogen-si wotsɔna ƒoa ƒui ƒe nuteɖeamedzi.
Le nuteɖeamedzi ene siawo siwo susɔ dome la, dzoxɔxɔ ƒe nuteɖeamedzie xɔ aƒe ɖe eme. Eyata le nusiwo hea nuteɖeamedzi vɛ nu la, woate ŋu amae ɖe hatsotso eve me: dzoxɔxɔ ƒe nuteɖeamedzi (dzoxɔxɔ ƒe nuteɖeamedzi) kple phase transformation stress (tissue stress).
2. Le mɔ si dzi nuteɖeamedzi le le yamenutome nu .
Woate ŋu amae ɖe mɔ ɖeka dzi nuteɖeamedzi, mɔ eve dzi nuteɖeamedzi kple mɔ etɔ̃ ƒe nuteɖeamedzi .
(1) Nuteɖeamedzi si le mɔ ɖeka dzi: Woyɔa nuteɖeamedzi si le mɔ ɖeka dzi le weldment me be stress ɖeka, si woyɔna hã be line stress. Le kpɔɖeŋu me, akɔtaɖonu siwo wotsɔ ga wɔe ƒe akɔta kple nuteɖeamedzi si dona ne wole tsia dzi le weldment la dzi.
(2) Mɔ eve ƒe nuteɖeamedzi: Woyɔa nuteɖeamedzi si wɔa dɔ ɖe mɔ eve siwo le tsiatre ɖe wo nɔewo ŋu le weldment ƒe yameʋu me be mɔ eve ƒe nuteɖeamedzi, si woyɔna hã be yameʋu ƒe nuteɖeamedzi. Zi geɖe la, edzɔna le welded structures of medium kple heavy plates siwo ƒe titrime nye 15-20mm.
(3) Mɔ etɔ̃ ƒe nuteɖeamedzi: Woyɔa nuteɖeamedzi si le dɔ wɔm le mɔ etɔ̃ nu si le tsitre ɖe wo nɔewo ŋu le weldment la me be mɔ etɔ̃ ƒe nuteɖeamedzi, si woyɔna hã be gbeɖiɖi ƒe sesẽme. Le kpɔɖeŋu me, nuteɖeamedzi si le welded thick plate si wotsɔ ga ƒo ƒui ƒe akɔta ƒe tsatsam kple weld siwo le mɔ etɔ̃ nu le tsitre ɖe wo nɔewo ŋu.
Ga la ƒe lolome keke ɖe enu kple eƒe ʋuʋu ne wodo dzoe eye wofae ɖe mɔ etɔ̃ nu, eyata le nyateƒe me la, nuteɖeamedzi susɔea si dona le weldment la me nyea nuteɖeamedzi si me mɔ etɔ̃ le ɣesiaɣi. Gake ne nuteɖeamedzi ƒe asixɔxɔ si le mɔ ɖeka alo eve me le sue ŋutɔ eye woate ŋu aŋe aɖaba aƒu edzi la, woate ŋu abui be enye nuteɖeamedzi si fiaa mɔ eve alo nuteɖeamedzi si fiaa mɔ wo, eye esi le etame la, nusi le etame la nyea nuteɖeamedzi si susɔ ƒe ƒomevi si nye welding.
Le pɔmpi siwo wotsɔ ga ƒo ƒui wɔwɔ ƒe ɖoɖoa me la, ehiã be woaɖe gakpo si wotsɔ ƒoa gae la ɖa, abɔbɔ, woawɔe eye woatsɔ ga aƒoe. Nuteɖeamedzi anɔ anyi godoo le ɣeyiɣi ma me. Be woate ŋu akpɔ pɔmpi siwo wotsɔ ga wɔe le dɔwɔƒewo eye wowɔa dɔ nyuie wu la, ele be woaɖe nuteɖeamedzi siawo ɖa. Le ɣeyiɣi ma ke me la, ne wobu gazazã ƒe nyaƒoɖeamenu si anɔ anyi ɣeyiɣi didi ŋu la, ehiã be woadi mɔ nyui aɖe si dzi woato axɔ ŋusẽ le ame ŋu. Hangao Tech (Seko Mɔ̃wo) Menye ɖeko mɔ̃ si wotsɔna ƒoa dzoe si me ŋusẽ mele o si me ŋusẽ mele o si me ŋusẽ mele o la ate ŋu aɖe nuteɖeamedzi si dona le mɔ̃ siwo wotsɔ ga wɔe ƒe wɔwɔ me ɖa ko o, ke boŋ ŋusẽzazã dzi kpɔkpɔ kple nutome takpɔkpɔ ƒe nɔnɔmewo hã le esi. Ne wotsɔe sɔ kple nu mawo tɔgbe la, ŋusẽ zazã nyuie nye 20%-30% si kɔ wu. Tsi fafɛ ƒe tsatsam ƒe ɖoɖoa ate ŋu akpɔ tsi ƒe nunɔamesiwo gbugbɔgazã adze sii eye wòakpɔ ga si wozãna ɣeyiɣi didi la dzi nyuie.
