Ehlelweni lokukhiqiza lomoya we-Power Tower, i-Welding inqubo ebaluleke kakhulu. Izinga le-welding lithinta ngqo ikhwalithi yokukhiqiza yombhoshongo. Ngakho-ke, kuyadingeka ukuqonda izimbangela zokulimala kwezimvula kanye nezindlela ezahlukahlukene zokuvimbela.
1. Umgodi womoya nokufakwa kwe-slag
I-porobity: i-porobity ibhekisela emgodini owakhiwa lapho igesi echibini elibunjiwe aliphunyuki ngaphambi kokuqina kwensimbi futhi lihlala eWeld. Igesi yayo ingahle idonswe yichibi elibunjiwe ngaphandle, noma lingakhiqizwa ngokusabela kwinqubo ye-welding metallurgy.
(2) Harm of blowholes: blowholes reduce the effective sectional area of the weld and loosen the weld, thus reducing the strength and plasticity of the joint and causing leakage. I-porolity ibuye ibe yinto ebangela ukugxila kwengcindezi. I-Hydrogen Porobity nayo inomthelela ekuqhekekeni okubandayo.
a. Susa ibala lamafutha, ukugqwala, amanzi kanye nama-sundries kusuka ku-wire welding, i-groove esebenza kanye nezindawo zayo eziseduze.
b. Izinduku ze-Alkaline Welding kanye noFlues zizosetshenziswa futhi zomiswe kahle.
c. Ukuxhumeka kwe-DC emuva kanye nokushiswa kwe-arc okufushane kuzokwamukelwa.
U-E. Welding uzokwenziwa ngokucaciswa okuqinile.
Fafaza
Izinyathelo zokuvimbela imifantu yekristalu:
a. Yehlisa okuqukethwe yizinto ezilimazayo ezinjenge-sulphur ne-phosphorus, kanye ne-weld ngezinto zokwenziwa ezinokuqukethwe okuphansi kwekhabhoni.
b. Izici ezithile ze-alloy zengezwa ukunciphisa amakristalu e-columnar kanye nokwehlukaniswa. Isibonelo, i-aluminium nensimbi kungahlaziya okusanhlamvu.
c. The weld with shallow penetration shall be used to improve the heat dissipation condition so that the low melting point material floats on the weld surface and does not exist in the weld.
d. Welding specifications shall be reasonably selected, and preheating and afterheating shall be adopted to reduce the cooling rate.
e. Bathatha ukulandelana okunengqondo komhlangano ukunciphisa ukucindezelwa kwe-welding.
Izinyathelo zokuvimbela ukuqhekeka kabusha:
a. Pay attention to the strengthening effect of metallurgical elements and their influence on reheat cracks.
b. Ngokunengqondo kuqala noma usebenzise i-andeheat ukulawula isilinganiso sokupholisa.
c. Yehlisa ukucindezelwa okusele ukugwema ukugxila kwengcindezi.
d. Ngesikhathi sokulangazela, gwema indawo yokushisa ebucayi yokuqhekeka okuvuselela kabusha noma unciphise isikhathi sokuhlala kule ndawo yokushisa.
Izinyathelo zokuvimbela ukuqhekeka okubandayo:
a. Low hydrogen type alkaline welding rod shall be used, dried strictly, stored at 100-150 ℃, and used when taking.
b. The preheating temperature shall be increased, the post heating measures shall be taken, and the interpass temperature shall not be less than the preheating temperature. The reasonable welding specification shall be selected to avoid brittle and hard structures in the weld.
c. Select reasonable welding sequence to reduce welding deformation and welding stress.
d. Conduct hydrogen elimination heat treatment in time after welding
Isikhathi sePosi: Nov-08-2022