Wɔfrɛ emu nhyɛso a ɛkɔ so wɔ welding awiei ne onwini a edi mũ akyi no welding residual stress. Wɔkyekyɛ welding residual stresses mu sɛnea edidi so yi:
1. Sɛnea nea ɛde adwennwen ba kyerɛ no .
(1) Ɔhyew mu nhyɛso: Welding yɛ ɔkwan a wɔfa so yɛ ɔhyew ne onwini a ɛnyɛ pɛpɛɛpɛ. Adwennwen a ɛwɔ weldment no mu no titiriw fi ɔhyew ne ɔhyew mu nsonsonoe a ɛnyɛ pɛpɛɛpɛ, a wɔfrɛ no ɔhyew mu nhyɛso, a wɔsan frɛ no ɔhyew nhyɛso.
(2) Ahosodi mu nhyɛso: Wɔfrɛ adwennwen a nhyehyɛe no ankasa anaasɛ akyi ahohyɛso de ba no sɛ ahosodi mu nhyɛso.
(3) Phase nsakraeɛ nhyɛsoɔ: Adwennwene a ɛnam microstructure nsakraeɛ a ɛnkɔ pɛpɛɛpɛ wɔ welded joint area no mu titire no, wɔfrɛ no phase transformation stress, a wɔsan frɛ no microstructure stress.
(4) Hydrogen a ɛma ɛyɛ den a ɛma ɛyɛ den: Wɔfrɛ adwennwen a efi hydrogen a ɛtrɛw a ɛboaboa ano wɔ afiri a wɔde hwɛ nneɛma nketenkete mu no mu titiriw no, wɔfrɛ no hydrogen a ɛma ɛyɛ den a ɛma ɛyɛ den.
Wɔ saa nhyɛso anan a aka yi mu no, ɔhyew mu nhyɛso na ɛwɔ hɔ kɛse. Enti, sɛnea nea ɛde adwennwen ba kyerɛ no, wobetumi akyekyɛ mu akuw abien: ɔhyew mu nhyɛso (ɔhyew nhyɛso) ne phase nsakrae nhyɛso (tissue stress).
2. Sɛnea adwennwen a ɛwɔ ahunmu kyerɛ no .
Wobetumi akyekyɛ mu ayɛ no ɔkwan biako so adwennwen, adwennwen a ɛwɔ akwan abien so ne adwennwen a ɛwɔ akwan abiɛsa so .
(1) Adwennwene a ɛkɔ ɔkwan biako so: Wɔfrɛ adwennwen a ɛwɔ hɔ wɔ ɔkwan biako so wɔ weldment no mu no, wɔfrɛ no unidirectional stress, a wɔsan frɛ no line stress. Sɛ nhwɛso no, butt welds a wɔde weld ayɛ ne adwennwen a ɛba bere a ɛrepuepue wɔ weldment no ani no.
(2) Adwennwene a ɛfa akwan abien ho: Wɔfrɛ adwennwen a ɛyɛ adwuma wɔ akwan abien a ɛteɛteɛ wɔn ho wɔn ho so wɔ weldment no plane mu no, wɔfrɛ no akwan abien so nhyɛso, a wɔsan frɛ no plane stress. Ɛtaa ba wɔ welded structures a ɛwɔ medium ne heavy mprɛte a ne kɛse yɛ 15-20mm.
(3) Adwennwene a ɛfa akwan abiɛsa so: Wɔfrɛ adwennwen a ɛyɛ adwuma wɔ akwan abiɛsa so a ɛne ne ho hyia wɔ weldment no mu no sɛ adwennwen a ɛwɔ akwan abiɛsa so, a wɔsan frɛ no volume stress. Sɛ nhwɛso no, adwennwen a ɛwɔ butt weld a ɛwɔ welded thick plate no ne weld ahorow no ntam no hyia wɔ akwan abiɛsa so a ɛne wɔn ho wɔn ho hyia.
Metal no volume ntrɛwmu ne ne twetwe bere a ɛyɛ hyew na ɛyɛ nwini no wɔ akwan abiɛsa so, enti sɛ yɛbɛka no katee a, adwennwen a aka a ɛba wɔ weldment no mu no yɛ adwennwen a ɛwɔ akwan abiɛsa so bere nyinaa. Nanso sɛ adwennwene bo a ɛwɔ akwan biako anaa abien so no sua koraa na wobetumi abu wɔn ani agu so a, wobetumi abu no sɛ adwennwen a ɛkɔ akwan abien so anaasɛ adwennwen a ɛkɔ ɔkwan biako so, na nea yɛaka ho asɛm wɔ atifi hɔ no yɛ nea ɛfa welding residual stress no su ho.
Wɔ welded pipes a wɔyɛ no mu no, ɛsɛ sɛ wɔde strip steel gu mu, wɔkotow, wɔhyehyɛ na wɔde weld gu mu. Akyinnye biara nni ho sɛ adwennwen bɛba wɔ saa bere no mu. Sɛnea ɛbɛyɛ a wobenya mfiridwuma mu welded nhama a ɛyɛ adwuma yiye no, ɛsɛ sɛ woyi saa nhyɛso ahorow yi fi hɔ. Bere koro no ara mu no, sɛ yesusuw ɛka a wɔbɔ bere tenten no ho a, ɛho hia sɛ wonya ɔkwan a etu mpɔn na ɛma ahoɔden so tew. Hangao Tech (seko mfiri) . Single-tube energy-saving bright annealing induction heater afiri no ntumi nyi adwennwene a ɛba bere a wɔreyɛ welded tubes no afi hɔ nko, na mmom ɛwɔ ahoɔden a wɔkora so ne nneɛma a atwa yɛn ho ahyia ho banbɔ su nso. Sɛ wɔde toto nneɛma a ɛte saa ara ho a, ahoɔden a wɔde di dwuma yiye no yɛ 20%-30%. Nsu a ɛma onwini di akɔneaba no betumi ama nsu a wɔde di dwuma bio no ayɛ yiye na adi ɛka a wɔbɔ bere tenten no so yiye.
