Dade a wɔde zinc akata so a wɔbɛyɛ no yɛ asɛnnennen a ɛtaa ba wɔ adwumayɛbea ahorow a wɔyɛ nneɛma no nyinaa mu. Welding a wɔde yɛ adwuma Galvanized Steel yɛ nea ebetumi aba koraa. Nanso, sɛ wɔyɛ saa a wonni nhyehyɛe a ɛfata a, ɛsɛe ɔdan no mudi mu kura ne nea ɔde di dwuma no ahobammɔ nyinaa kɛse. Welderfo hyia saa nneɛma a ɛyɛ den a ɛne wɔn ho wɔn ho di nkitaho yi da biara da. Wɔhyɛ nkɔm sɛ sɛ wɔyɛ adwuma a wɔde zinc akata so te sɛ carbon dade a ɛda hɔ kwa no pɛpɛɛpɛ a, ɛbɛma wɔatumi ahwɛ sɛnea wɔayɛ no yiye. Ɛsan nso ma nsuo a ɛyɛ hyew ntɛmntɛm a wontumi nkwati wɔ Heat-Affected Zone (HAZ) no mu. Bio nso, zinc a wɔhyew no ma sotɔɔ fam tebea horow a asiane wom kɛse ba. Dade wusiw a awuduru wom de asodi kɛse ba adwuma biara a wɔyɛ nneɛma a wɔyɛ so. Yɛde nhyehyɛe a emu da hɔ, a egyina adanse so a wɔde bɛsɔ bere ne ɔkwan a wɔbɛfa so ayɛ weld yi yiye ma. Wubesua akwan a mfaso wɔ so a wobɛfa so abrɛ dade mu sintɔ a emu yɛ den ase na woabɔ wo kuw no ho ban. Yɛsan nso kata gyinapɛn a ɛyɛ katee a ɛfa mmara sodi ho a ɛhwehwɛ na ama woakura bere tenten a ɛko tia nsɛe wɔ wo adan a etwa to no mu.
Nneɛma Titiriw a Wɔde Kɔ
Nea ebetumi aba: Wobetumi ayɛ dade a wɔde galvanized ayɛ no welded, sɛ wɔayi zinc a wɔde akata so no afi baabi a wɔde weld no ayɛ no koraa ansa na wɔabɔ arc a.
Mfomso a Wosiw Ano: Sɛ wɔantumi anyi zinc a, ɛde weld porosity a emu yɛ den, nea ɛka ho, ne intergranular mpaapaemu ba esiane nsonsonoe kɛse a ɛwɔ mmeae a zinc ne dade no nwene mu nti.
Ahobammɔ a Ɛho Hia: Zinc a wɔayam no ma wusiw a awuduru wom kɛse ba. PPE ne mframa a ɛfata yɛ mmara ne akwahosan ho ahwehwɛde ahorow a wontumi nsusuw ho.
Post-Weld Compliance: Welding sɛe zinc a ɛbɔ ho ban no; fabrication a edi mu hwehwɛ sɛ wɔsan de weld akyi sɛnea ASTM A 780 gyinapɛn ahorow kyerɛ pɛpɛɛpɛ.
Metallurgical Nokwasɛm a Ɛfa Welding Galvanized Steel Ho
Abɔde mu nneɛma a ɛfa huammɔdi ho ntease yɛ fapem a wɔde yɛ nneɛma a ahobammɔ wom. Zinc bow na ɛyɛ nwini wɔ bɛyɛ 420°C (900°F). Nea ɛne no bɔ abira no, dade no nwene wɔ bɛyɛ 1500°C (2700°F). Saa ɔhyew mu nsonsonoe kɛse yi na ɛde mfiridwuma mu asɛnnennen titiriw no ba. Worentumi nwene dade abien no nyinaa bere koro mu wɔ ɔkwan a ɛyɛ den so kɛkɛ.
Sɛ wɔde weld yɛ no tẽẽ a, zinc no yɛ nwini ntɛm ara wɔ arc no ase. Ɛkyere wɔ dade a wɔabɔ no atɛkyɛ no mu bere a atɛkyɛ no reyɛ den ntɛmntɛm no. Saa mframa a wɔakyere no yi ma nsu a ɛyɛ mmerɛw kɛse ba. Ɛsan nso de nneɛma a wɔde ka ho ne fusion a enni hɔ a asiane wom ba. Weld a gas kotoku ahyɛ mu ma no ntumi nsoa nnesoa a emu yɛ duru a wɔde yɛ ɔdan no.
Nnwumayɛbea ho nsɛm kyerɛ ɔkwan a ɛda adi pefee a wɔfa so kɔ anim ma nhyehyɛe mu nokwaredi. Sɛ wosiesie no yiye denam zinc no a woyi fi hɔ koraa so a, ɔbrɛ ahoɔden no kɔ so tra hɔ. Sɛnea nkwaa a ɛho tew no mu paapae no te sɛ dade a wɔankata so no yɛ pɛ. Sɛ wudi ahosiesie nhyehyɛe a emu yɛ den akyi a, worenhwere mfiri adwumayɛ.
Zinc a ɛkɔ mu no mu mpaapaemu da so ara yɛ asiane kɛse bere a wɔreyɛ no. Zinc a ɛyɛ nsu betumi akɔ dade a ɛyɛ den a wɔahyɛ no den no aburow hye mu. Yɛko tia mfiridwuma mu ɔhaw pɔtee yi denam electrode a silicon anaa rutile kakraa bi na yɛde di dwuma so. Ma silicon a ɛwɔ mu no nkɔ fam 0.2 Si na ama asiane ahorow a ɛwɔ mpaapaemu yi so atew yiye.
Nneɛma a Wɔde Yɛ Tebea |
Weld Porosity Asiane a Ɛwɔ Hɔ |
Asiane a Ɛma Wɔpaapae Mu |
Nneɛma a Wɔde Di Dwuma a Wɔde Di Dwuma a Ɛde Ba |
Bare Carbon Dade a Wɔde Yɛ Nneɛma |
Fam |
Fam |
Mfitiase Gyinapɛn |
Zinc Coating a Wɔansiesie |
Ɔkorɔn Kɛse |
Ɛkɔ soro (Zinc a Ɛhyɛn Mu) . |
Wɔayɛ no Ase Kɛse |
Nkwaa a Wɔabɔ no Yiye |
Fam |
Ɛba fam (wɔde <0.2 Si Electrode di dwuma) . |
Nea ɛne Baseline no yɛ pɛ |
Akwahosan, Ahobammɔ, ne Mmara a Wɔde Di Dwuma Ho Nhyehyɛe a Wɔnnyɛ Nkitahodi
Zinc oxide wusiw a wɔhome no de akwahosan ho asiane ahorow a emu yɛ den ba ntɛm ara. Wɔn a wɔyɛ adwuma a wɔde zinc a wɔayɛ no vaporized di dwuma no taa nya Metal Fume Fever. Wonya yare a emu yɛ den a ɛte sɛ atiridiinini bere a wɔde wɔn ho ahyɛ mu akyi bere tiaa bi. Saa sɛnkyerɛnne ahorow yi bi ne akisikuru a emu yɛ den, atiridiinini, atiridiinini a ano yɛ den, ne ntini mu yaw a emu yɛ duru. Saa nyarewa a ɛba mpofirim yi ma adwumayɛfo a wɔn ho akokwaw to nkyɛn na ɛde adwumayɛbea ho aka a emu yɛ duru ba.
Nea ɛyɛ awerɛhow no, sotɔɔ pii da so ara de wɔn ho to adwumayɛbea anansesɛm a asiane wom so. Welderfo binom gye di ankasa sɛ nufusu a wɔnom no siw dade a emu yɛ duru awuduru ano. Ɛsɛ sɛ yedi sotɔɔ mu asɛm a ɛyɛ hu yi ho dwuma na yɛpow ntɛm ara. Nufusu nkata ahurututu no so anaasɛ ennyae dade a ɛtwetwe no wɔ ɔkwan biara so. Aduan biara nni hɔ koraa a wɔde besi mfiridwuma mu nhyehyɛe a ɛfata ananmu.
Ahobammɔ ho nnyinasosɛm a ɛyɛ ahyɛde bɔ w’adwumayɛfo ho ban fi ɔhaw a ɛbɛtra hɔ daa ho. Ɛsɛ sɛ wode ɔhome ne nneɛma a atwa yɛn ho ahyia ho ahobammɔ a emu yɛ den di dwuma.
Fa mframa a wɔde fa fibea-capture a ɛyɛ nnam hyehyɛ mu na ama wɔatwe wusiw afi baabi a wɔhome no.
Fa mmeae a ɛhɔ yɛ petee anaasɛ mmeae a mframa fa mu di dwuma wɔ baabiara a ɛbɛyɛ yiye wɔ honam fam.
Ma P100 (HEPA) fã-akataso ntumi nkɔyi nneɛma nketenkete a ɛyɛ hu yiye.
Fa Powered Air-Purifying Respirators (PAPR) di dwuma ma adwumayɛfo a wɔyɛ adwuma wɔ mmeae a wɔato mu nyinaa.
Pre-Weld Surface Preparation: Ade a Ɛsi gyinae ma Nneɛma a Ɛyɛ Pa
AWS D-19.0 gyinapɛn ahorow no ma mmara a ɛyɛ katee a wɔde besiesie wɔn ho. Wɔkyerɛ sɛ wobeyi zinc a wɔde akata so no afi baabi a wɔde weld ayɛ no ntam kwan yɛ nsateakwaa 1 kosi 4 (sentimita 2.5 kosi 10). Ɛsɛ sɛ woyɛ saa clearance yi wɔ joint no afã abien no nyinaa ansa na woabɔ arc. Sɛ wohuruw anammɔn yi a, ɛma wohwɛ hu sɛ nhwehwɛmu a entumi nyɛ yiye.
Wɔn a wɔyɛ nneɛma pii bu wɔn ani gu ahwehwɛde a ɛne sɛ wɔbɛhohoro nkwaa no akyi no so koraa. Yɛfrɛ eyi ahunahuna a ahintaw. Ɔhyew a ɛkɔ so no ma zinc a ɛwɔ akyi no yɛ hyew ntɛmntɛm bere a wɔreyɛ welding no. Saa ɔhyew ntini a ɛyɛ adwuma yi twe mframa a awuduru wom ne efĩ kɔ weld no ntini mu tẽẽ. Ɛsɛ sɛ wohohoro ɔfã biara a ɔhyew a ano yɛ den wom no ho.
Mpɛn pii no, wɔn a wɔyɛ adwuma no paw akwan a wɔfa so yi mfiri ne nnuru fi hɔ.
Mfiri a Wɔde Yi Fi hɔ: Eyi gyina hɔ ma nnwuma no mu adeyɛ a eye sen biara ma sotɔɔ dodow no ara. Fa hard grinding discs anaa abrasive flap wheels di dwuma na ama woanya dade a ɛhyerɛn na ɛda hɔ kwa. Hwɛ hu sɛ wubeyi zinc a wɔde afrafra no nyinaa afi hɔ, na ɛnyɛ nea ɛyɛ kusuu no nkutoo.
Nnuru a Wɔde Yi Fi Mu: Wubetumi de muriatic acid adi dwuma de ayi nnuru afi mu wɔ mmeae pɔtee bi. Nanso, saa kwan yi hwehwɛ sɛ wɔde nnuru di dwuma pɛpɛɛpɛ koraa. Ɛsɛ sɛ wode baking soda de ahoɔhare ma acid no yɛ nea ɛnyɛ hwee. Awiei koraa no, ma dade no nwo yiye na amma hydrogen ansɛe kɛse.
Paw Welding Adeyɛ ne Parameters a Ɛfata
Dwumadi ahorow hwehwɛ sɛ wɔpaw nhyehyɛe pɔtee bi. Sɛ wosakra wo kwan no a, ɛmma nsu a ɛbɛpetepete so dodo no nsiw ano na ɛhwɛ hu sɛ wobɛkɔ mu akɔ akyiri.
MIG Welding (GMAW) yɛ adwuma sɛ nea eye sen biara a wɔpaw ma nneɛma a ɛyɛ tratraa te sɛ a dade a wɔde galvanized ayɛ . Parameter nsakrae pɔtee ho hia kɛse wɔ ha. Wɔn a wɔyɛ adwuma no hwehwɛ sɛ wɔde akwantu ahoɔhare a ɛba fam kakra sen nea wɔde yɛ dade a ɛda hɔ kwa no. Ahoɔhare a ɛkɔ brɛoo no ma zinc a aka no hyew wɔ atɛkyɛ no anim. Sɛ woma ahoɔden no kɔ soro a, ɛboa ma wɔbɔ zinc ketewaa biara a aka wɔ soro no mu. Fa Argon/CO2 gas afrafra di dwuma de ma arc no gyina na ɛtew flying spatter so koraa.
Stick Welding (SMAW) da so ara yɛ ɔkwan a wɔpɛ ma adan a ɛyɛ den. Mfiridwuma mu nsakrae ho hia kɛse na ama wɔakum obi yiye. Ɛsɛ sɛ wɔn a wɔyɛ adwuma no hyɛ da tew ahoɔhare a wɔde tu kwan no so. Ɛsɛ sɛ wɔsesa electrode no anim kɔ fam kodu bɛyɛ digrii 30. Sɛ wode rhythmic 'whipping action' di dwuma a, pia vaporizing zinc kɔ anim na efi weld kwan no mu. E7018 low-hydrogen electrodes som sɛ gyinapɛn a wɔpaw ma saa adwuma a emu yɛ duru yi.
TIG Welding (GTAW) de adwumayɛ mu haw akɛse ba. Yɛhyɛ saa kwan yi abam kɛse wɔ afã horow a wɔayɛ ho adwuma ho. GTAW nhyehyɛe no yɛ nea ɛyɛ mmerɛw dodo wɔ abɔnten so efĩ ho. Zinc a wɔayɛ no vaporized bɛsɛe tungsten electrode no ntɛm ara. Ɛsɛe gas kyɛm no na ɛma ahama bi a efĩ wom kɛse.
Welding Adeyɛ a Wɔyɛ |
Ne Nyinaa Fata a Ɛfata |
Nneɛma a Wɔde Yɛ Adwuma a Ɛyɛ Paara |
Parameter Nsakrae a Ɛho Hia |
MIG (GMAW) . |
Soro |
Dade a Ɛyɛ Teateaa |
Ahoɔhare a ɛba fam, ahoɔden a ɛkorɔn, Argon/CO2 afrafra |
Nnua (SMAW) . |
Soro |
Dade a Wɔde Yɛ Nneɛma a Ɛyɛ Den |
30-digrii anim, mpire adeyɛ, E7018 electrode |
TIG (GTAW) . |
Ɛba fam yiye |
Wɔnkamfo Nkyerɛ |
Wɔn abam abu kɛse esiane tungsten a ɛde efĩ ba ntɛmntɛm nti |
Post-Weld Sanba ne Nkwa Kyinhyia Ahobammɔ
Ɔhyew a ano yɛ den yi nneɛma a ɛko tia nsɛe no fi dade a atwa ho ahyia no mu daa. Yɛfrɛ eyi sɛ Heat-Affected Zone (HAZ) haw. Saa ɔhyew a ɛsɛe ade yi ma beae a wɔaka abom foforo no yɛ mmerɛw ntɛm ara sɛ nkannare betumi asɛe. Sɛ wɔamfa wɔn ho annye mu a, galvanic nkwammoaa bi ba. Saa nkwammoaa yi ma dade a ɛda hɔ kwa a atwa ho ahyia no sɛe ntɛmntɛm.
Ɛsɛ sɛ wokyerɛ oprehyɛn a wɔahyɛ da ayɛ a wɔde siesie nkwaa no. ASTM A 780 a wodi so katee no siw oxidation a ɛba ntɛm ano. Saa nkyerɛkyerɛmu yi akyi a wodi no hwɛ hu sɛ nhyiam no du ne nkwa nna a wɔayɛ no ho.
Nnwumayɛbea gyinapɛn ahorow gye akwan horow pii a etu mpɔn kɛse a wɔfa so san de nneɛma foforo tom.
Mfonini titiriw a zinc pii wom a wɔde bɛhyɛ dade a ɛda hɔ kwa no so. Ɛsɛ sɛ anyɛ yiye koraa no, zinc a ɛho tew 95% wɔ saa mfiridwuma mu nneɛma a wɔde kata so yi wɔ sini a ɛyɛ dry no mu.
Sɛ wɔde zinc-based soldering alloys di dwuma de nwene akwanside foforo a ɛbɔ ho ban wɔ dade a ɛda hɔ kwa no so.
Ɔhyew a wɔde petepete nneɛma so, a wɔsan frɛ no metallizing, de yɛ aguadi ne mfiridwuma mu nneɛma a emu yɛ duru.
Di client akwanhwɛ ho dwuma ntɛm wɔ fabrication nhyehyɛe no mu. Mfiase no mmeae a wɔasiesie no bɛda afɛfɛde kɔla a ɛnhyia a ɛda nsow adi. Wɔtaa yɛ dwetɛ a ɛhyerɛn wɔ akyi a ɛyɛ fitaa a ɛyɛ kusuu. Wɔbɛtena wim tebea mu na wɔayɛ oxidize sɛnea ɛbɛyɛ a ɛne nea wɔde wiei mfiase no bɛyɛ pɛ bere a bere kɔ so no.
Fabrication Alternatives a Wɔbɛhwehwɛ mu ama ROI a eye
Grinding, welding soronko, ne post-weld touch-ups de adwumayɛfo ka kɛse ba. Wɔsan nso de adwumayɛ mu nsɛnnennen a ɛyɛ abasamtu ba. Ɛsɛ sɛ nnwumawuranom susuw ho sɛ ebia ntease wɔ sikasɛm mu sɛ ebia dade a wɔadi kan akata so welding. Ɛtɔ mmere bi a, akwan foforo a wɔfa so yɛ adwuma no ma wonya mfaso a ɛkorɔn sen biara wɔ Sika a Wɔde Toto Mu no so.
Sɛ wopɛ nneɛma a emu yɛ duru a, fa ahwɛyiye susuw ROI a ɛwɔ nhyehyɛe a wɔde di dwuma nnidiso nnidiso mu no ho. Susuw ho sɛ wode dade a wɔannoa a wɔmfa nkata so bɛyɛ wo nhyiam ahorow no nyinaa kan. Afei wubetumi de nhyiam a wɔawie, a wɔde weld ayɛ no nyinaa akɔ abɔnten ama hot-dip galvanizing. Saa nnidiso nnidiso yi yi nea wɔyam no fi hɔ, ɛma wusiw a ɛyɛ hu gyae, na ɛma wonya akorade a ɛkɔ so bɔ ho ban.
Susuw mfiridwuma mu nkwaa a wɔde yɛ mfiri a wɔde bolted nkitahodi ho sen sɛ wode weld bɛyɛ. Saa ɔkwan foforo yi yi zinc wusiw a awuduru wom fi wo sotɔɔ mu koraa. Ɛsan nso yi hia a ehia sɛ wɔsan de HAZ san ne ɔhome nneɛma a ne bo yɛ den no fi hɔ.
Nneɛma a wɔyɛ a ɛdɔɔso a enhia sɛ wɔde structural welding yɛ no nya mfaso fi raw material a wɔtɔ a nyansa wom mu. Sourcing kɔ so galvanized dade coil a wɔde yɛ roll-forming anaa stamping taa da adi sɛ ɛho ka sua kɛse. Piece-part coating sɛe bere ne sika kɛse bere a raw coil hyia pɛpɛɛpɛ wɔ wo specifications. Stamping pre-coated coils ma nhyehyɛe ahorow a wɔyɛ no yɛ ntɛmntɛm kɛse.
Awie
Dade a wɔde zinc akata so a wɔbɛyɛ no hwehwɛ sɛ wɔde nteɛso, nhyehyɛe a ɛkorɔn di dwuma. Saa nneɛma yi a wɔde weld yɛ no yɛ adeyɛ a ahobammɔ wom na ɛyɛ nea ɛfata wɔ nhyehyɛe mu bere a wudi ahosiesie a emu yɛ den a wɔyɛ wɔ soro no akyi nkutoo. Ɛsɛ sɛ wode welding parameters a wɔahyɛ da ayɛ no di dwuma na wohyɛ nea ɛne no hyia wɔ post-weld sanba mu. Wɔhyɛ nkɔm sɛ akwan tiawa a wobɛfa so asiesie wo ho no bɛma ade a etwa to no ne w’adwumayɛfo akwahosan nyinaa asɛe.
Ɛsɛ sɛ wɔn a wosi gyinae no tu anammɔn a edi hɔ a egyina adeyɛ so ntɛm ara. Yɛhyɛ nyansa sɛ hwɛ wo mprempren sotɔɔ-fam SOP ahorow no mu na ama woahwɛ ahu sɛ ɛne AWS ne ASTM gyinapɛn ahorow hyia denneennen. Hwɛ wo PPE inventory nnɛ na hwɛ sɛ wowɔ P100 filters a ɛfata ne active ventilation systems. Awiei koraa no, yɛ ɛka-mfaso nhwehwɛmu a ɛkɔ akyiri a wode toto adwumayɛ nhyehyɛe a edi kan wɔ galvanizing ho ne adwumayɛ nhyehyɛe a ɛwɔ galvanizing akyi. Sɛ woyɛ saa nnidiso nnidiso pɔtee yi yiye a, ɛbɛma wo dwumadi mu mmɔdenbɔ ayɛ kɛse na abɔ wo sikasɛm ho ban.
FAQ
Asɛmmisa: So wubetumi de dade a ɛyɛ mmerɛw ayɛ dade a wɔde galvanized ayɛ?
A: Yiw, nanso ɛsɛ sɛ wɔda so ara yi adwuma a wɔde galvanized ayɛ no san kɔ dade a ɛyɛ mmerɛw a ɛda hɔ kwa wɔ baabi a wɔde nkitahodi no di dwuma no. Ɛsɛ sɛ wogyaw nsonsonoe nketenkete na ama zinc mframa biara a aka a efi HAZ no mu no atumi aguan a ɛremma porosity mma.
Asɛmmisa: So asiane biara nni ho sɛ wobɛbɔ dade a wɔde galvanized ayɛ wɔ abɔnten?
A: Abɔnten so welding ma mframa a ɛkɔ mu no tu mpɔn kɛse nanso ɛmma asiane no mfi hɔ. Ɛsɛ sɛ wɔn a wɔyɛ adwuma no da so ara hyɛ mfiri a wɔde home a wɔakyerɛw no P100 na wɔyam zinc no.
Asɛmmisa: Sɛ me weld wɔ zinc so a menyam no a, dɛn na ɛba?
A: Weld no behu amane wɔ porosity a emu yɛ den (gas bubbles a wɔakyere) ne fusion a enni mu, na ɛbɛma ayɛ nea ɛnyɛ papa wɔ ne nhyehyɛe mu na ɛyɛ mmerɛw kɛse sɛ ebetumi adi nkogu wɔ adesoa ase.
