1.1 Weldability a chromium molybdenum ɔhyew a ɛko tia dade .
Chromium ne molybdenum ne ade titiriw a wɔde afrafra, pearlite ɔhyew-aduru a ɛko tia dade no ma ɔhyew a ɛkorɔn ne ɔhyew a ɛkɔ soro a ɛko tia dade ahorow no tu mpɔn kɛse, nanso ɛma dade welding, welding seam ne ɔhyew a ɛka beae a ɛwɔ su a ɛkorɔn a ɛma su a ɛkorɔn, dum wɔ mframa a ɛma onwini akyi no yɛ nea ɛyɛ mmerɛw sɛ wɔde welding bɛma wɔn ho wɔn ho, na ɛnyɛ nea ɛyɛ den sɛ wobenya no, na ɛnyɛ nea ɛyɛ den sɛ wɔbɛma wɔn ho ayɛ den, na ɛnyɛ nea ɛyɛ den sɛ wɔbɛma wɔn ho ayɛ den, na ɛnyɛ nea ɛyɛ den sɛ wɔbɛma wɔn ho ayɛ den, na ɛnyɛ nea ɛyɛ den sɛ wɔbɛma wɔn ho ayɛ wɔn hyew, na ɛnyɛ nea ɛyɛ den sɛ wɔbɛma wɔn ho ayɛ wɔn hyew. adwennwen, enti awɔw mu mpaapaemu su.
Enti, ɔhaw titiriw a ɛfa dade a wɔde yɛ ɔhyew a ɛko tia ɔhyew ho ne mpaapaemu, na mpaapaemu yɛ nneɛma abiɛsa: nhyehyɛe, adwennwen ne hydrogen a ɛwɔ weld no mu, enti ɛho hia titiriw sɛ wɔyɛ welding nhyehyɛe a ntease wom.
2.1 Groove .
Mpɛn pii no, ogya anaa plasma a wotwitwa no na ɛyɛ groove processing. Sɛ ɛho hia a, ɛsɛ sɛ wodi kan twitwa no hyew nso, na ɛsɛ sɛ wɔyɛ PT nhwehwɛmu bere a wɔayɛ no fɛfɛɛfɛ awie no na ama wɔayi mpaapaemu a ɛwɔ abon no so no afi hɔ. Mpɛn pii no paw v-Type groove, groove angle yɛ 60℃, fi adwene a ɛne sɛ wobesiw mpaapaemu ano no, groove angle no yɛ papa kɛse, nanso ɛma welding dodow no kɔ soro, na groove ne mu afã abien no nyinaa ho tew, yi ngo, rust ne nsu ne efĩ afoforo (hydrogen, siw porosity ano).
2.2 a wɔde asi so .
Abisade ntumi nhyɛ kuw no den sɛ wobesiw mu adwennwen ano, esiane ne chromium molybdenum alloy dade mpaapaemu su a ɛkorɔn nti, ɛno nti, bere a welding seam a ɛwɔ anohyeto℃no nyɛ kɛse dodo no, WeChat ɔmanfo nɔma: hene a welding, sɛnea ɛbɛyɛ a ɛnsɛ sɛ ɛde stiffness a ɛboro so ba, titiriw wɔ thick plate welding, ɛsɛ sɛ wɔde welld shrinkage of brace, jrace, jrace, jrace, jrace, jrace, jrace.
2.3 Welding kwan a wfa so paw .
Mprempren, welding akwan a wɔtaa fa so yɛ pipeline welding wɔ petroleum ne petrochemical installation units mu no yɛ gtaw ma ase ne electrode arc welding ma kataso no. Akwan foforo a wɔfa so yɛ welding no bi ne MIG welding, CO2 gas welding, electroslag welding ne automatic nsu ase arc welding, ne nea ɛkeka ho.
2.4 Nneɛma a wɔde yɛ welding .
Nnyinasosɛm a ɛfa welding nneɛma, alloy composition ne ahoɔden adwumayɛ ho no ɛsɛ sɛ weld metal no ne base metal index a ɛne no hyia no hyia titiriw anaasɛ ɛsɛ sɛ edu adwumayɛ ho index a ɛba fam sen biara a mfiridwuma tebea horow a ɛwɔ ade no mu de ato gua no ho. Na sɛnea ɛbɛyɛ a hydrogen a ɛwɔ mu no so bɛtew no ɛsɛ sɛ ɛne alkaline low hydrogen type electrode, electrode anaasɛ flux ɛsɛ sɛ ɛne nhyehyɛe no hyia, drying technology, a ɛka ho, weChat ɔmanfo dodow: micro welder, de hyɛ electrode nkɔanim bere a nkɔanim wɔ ɔhyew insulation barres, electrode mprɛnsa than than than than than the than just insulation barrel of concrete construction, wɔ nsiesiei a ɛkɔ akyiri. Austenitic stainless steel electrode, te sɛ A307, nso betumi adi dwuma ama manual arc welding of chromium-molybdenum heat resistant steel, nanso ɛda so ara hia sɛ wodi kan yɛ no hyew ansa na welding. Saa kwan yi fata ma tebea a welding afã horow no ntumi nyɛ ɔhyew ho adwuma wɔ welding akyi.
2.5 Preheating .
Preheating yɛ mfiridwuma mu susudua a ɛho hia ma awɔw mu mpaapaemu ne adwennwen a woyi fi mu wɔ welding pearlite ɔhyew-ɛko tia dade mu. Sɛnea ɛbɛyɛ a wobɛhwɛ ahu sɛ welding no yɛ papa no, ɛsɛ sɛ wɔyɛ ɔhyew ne ɔhyew pɔtee bi a ɛwɔ hɔ ansa na wɔayɛ no yiye wɔ baabi a wosiesie ne welding nyinaa.
2.6 Onwini a ɛyɛ brɛoo wɔ welding akyi .
Afei welding slow cooling yɛ nnyinasosɛm a welding chromium molybdenum ɔhyew a ɛko tia dade ɛsɛ sɛ wodi akyi katee, mpo wɔ awɔw bere mu ɛsɛ sɛ ɛyɛ eyi, mpɛn pii no ntɛm ara akyi welding ne asbestos ntama kata weld ne bɛn seam area, nketewa welding asinasin betumi de si asbestos ntama coolth.
2.7 Post-Welding Ɔhyew a Wɔde Yɛ Adwuma .
Ɛsɛ sɛ wɔyɛ ɔhyew ayaresa no ntɛm ara bere a wɔayɛ welding no akyi sɛnea ɛbɛyɛ a ɛrenkyɛ koraa, ayi adwennwen afi hɔ na ama microstructure atu mpɔn.
