Kureba refu gasi pombi, kushandisa yakakwirira giredhi pombi simbi ndiyo nzira huru yekuchengetedza mari.Canada's pombi indasitiri yekudzidzira yakaratidza kuti: kana ichienzaniswa neX60, kutorwa kweX70 pombi madziro ukobvu kunogona kudzikiswa 14%; Kana ichienzaniswa neX70, kutorwa kweX80 pombi madziro ukobvu kunogona kudzikiswa ne12.5%.Welding ndeimwe yeakakosha malink mukugadzirwa kwepombi yesimbi uye kuvakwa kwepombi, nekuda kwekusaenzana welding thermal cycle, welding heat inokanganisa zone (HAZ) chikamu chisina kusimba chepombi.Kutonhora kweyero ndiyo huru parameter yekuona HAZ sangano mashandiro, inoenderana neiyo welding kupisa kupinza, ukobvu hweworkpiece uye yakatenderedza radiation mamiriro.Naizvozvo, kugadzira inonzwisisika welding process, kudzora welding kutonhora kumhanya kunogona kuwana yakanakisa sangano kuita kweHAZ, dzivirira HAZ kutsemuka, kuitira kuti uve nechokwadi chekuchengetedzwa kwepombi.

Nekuwedzera kwechiyero chekutonhora, iyo microstructure yeX80 pipeline simbi HAZ inopihwa pamberi kune polygonal ferrite, kupa pamberi kune B kana tsanga yelath martensite, kuoma kunowedzera.Kana iyo welding yekudziya yekuisa yakakura kwazvo kana preheating tembiricha yakanyanya kukwira uye kumhanya kwekutonhora kwakadzikira kupfuura 2℃/ s, X80 pombi yesimbi HAZ sangano rinopihwa pekutanga kune kana B polygon ferrite tsanga, asi nekuda kwekuvapo kwepearlite uye MA chitsuwa cheboka block kugovera, zvichitungamira kune yakakora crystal kukanganisa kuita kushomeka.Kana iyo welding yekupisa yekuisa iri diki kana preheating tembiricha yakadzikira uye kumhanya kwekutonhora kwakakura kupfuura makumi matatu.℃/ s, X80 pombi yesimbi HAZ sangano rinopihwa pekutanga neBF kana lamellar martensite, zvichikonzera kudzikira kweiyo coarse crystal impact performance.Kugadzira inonzwisisika welding process, kudzora chiyero chekutonhora mukati mechikamu che2 ~ 30℃/ s, X80 pombi yesimbi HAZ sangano inopihwa pamberi peB, MA boka rechitsuwa rakapararira, nzvimbo yezviyo yakaomarara ine kuoma kwakakodzera uye kuita kwakanakisa kuita.