1.1 Okuweta kwa chromium molybdenum ebbugumu eriziyiza ekyuma .
Chromium and molybdenum are the main alloy elements, pearlite heat-resistant steel significantly improve the high temperature strength and high temperature oxidation resistance of metals, but they make metal welding performance, welding seam and heat affected zone in which has a high tendency, quenching in air cooling after welding is easy to produce the hard and brittle martensite structure, not only affects the mechanical properties of welded joint, and produce a lot of situleesi, bwe kityo omuze gw’enjatika ennyogovu.
N’olwekyo, ekizibu ekikulu eky’okuweta ekyuma ekiziyiza ebbugumu ye nnyatika, era okutondebwa kw’enjatika kwe bintu bisatu: ensengekera, situleesi n’ebirimu haidrojeni mu weld, kale kikulu nnyo naddala okukola enkola ya welding ensaamusaamu.
2.1 Ekituli .
Okulongoosa groove kutera kukolebwa mu nkola y’okusala ennimi z’omuliro oba plasma. Bwe kiba kyetaagisa, okusala nakyo kulina okubuguma, era okwekebejja PT kulina okukolebwa oluvannyuma lw’okusiimuula okuggya enjatika ku kisenge. Ebiseera ebisinga londa v-ekika kya groove, groove angle is 60℃, okusinziira ku ndowooza y’okuziyiza enjatika, groove angle esinga okubeera ennungi, naye yongera ku welding amount, ne groove ne munda mu njuyi zombi ez’ettaka okuyonja, okuggyawo amafuta, obusagwa n’obucaafu obulala (amazzi, okuziyiza obuziba).
2.2 Eteekeddwa ku .
Okusaba tekuyinza kussa mu nkola kibinja kuziyiza kukola stress ey’omunda, olw’empisa yaayo eya chromium molybdenum aloy enjatika ey’amaanyi, n’olwekyo, bwe kiba nti omusono gwa welding ogw’ekiziyiza si kinene nnyo, Wechat public number: king of welding, so as not to cause excessive stiffness, naddala mu thick plate welding, okuziyiza weld free shrinkage of brace, jigy ne brace ne brace ne brace, should avoid to use.
2.3 Okulonda enkola ya welding .
Mu kiseera kino, enkola za welding ezikozesebwa ennyo ez’okuweta payipu mu mafuta g’amafuta n’ebyuma ebiteeka amafuta (petrochemical installation units) ye GTAW ku wansi ne electrode arc welding for the cover. Enkola endala ez’okuweta mulimu okuweta MIG, okuweta CO2, okuweta kwa electroslag n’okuweta arc mu mazzi aga wansi, n’ebirala.
2.4 Okulonda ebikozesebwa mu kuweta .
Omusingi gw’okulonda ebikozesebwa mu kuweta, ensengekera ya aloy n’omutindo gw’amaanyi g’ekyuma kya weld mu bukulu gulina okukwatagana n’omuwendo ogukwatagana ogw’ekyuma ekikulu oba gulina okutuuka ku muwendo gw’omulimu ogusinga wansi oguteeseddwa embeera z’eby’ekikugu ez’ekintu. Era okusobola okukendeeza ku bungi bwa haidrojeni bulina okuba ne alkaline low hydrogen type electrode, electrode oba flux erina okuba nga egoberera provisions, okukala tekinologiya, wamu nabwo, wechat public number: micro welder, okuteeka mu electrode okweyongera n'okukozesebwa okweyongera mu heat insulation barrels, electrode shouth than 4 essaawa mu bbugumu mu nsuku of concrete construction, balina provisions mu bujjuvu. Austenitic stainless steel electrode, nga A307, esobola n’okukozesebwa mu manual arc welding of chromium-Molybdenum heat resistant steel, naye ekyalina okusooka okubuguma nga tebannaba kuweta. Enkola eno esaanira embeera nti ebitundu bya welding tebiyinza kulongoosebwa mu bbugumu oluvannyuma lw’okuweta.
2.5 Okusooka okubugumya .
Okusooka okubugumya kye kipimo kya tekinologiya ekikulu eky’okumalawo enjatika ennyogovu n’okuggwaamu situleesi mu kuweta ebbugumu lya luulu-eruma ekyuma ekiziyiza. Okusobola okukakasa omutindo gw’okuweta, okusooka okubugumya n’okulabirira ebbugumu erimu lirina okukolebwa mu nkola zombi ez’okutereeza ebifo n’okuweta.
2.6 Okunyogoza mpola oluvannyuma lw’okuweta .
Oluvannyuma lw’okuweta okunyogoza empola gwe musingi gw’okuweta chromium molybdenum heat resistant steel gulina okugobererwa ennyo, ne mu kyeya eky’ebbugumu kino kirina okukola kino, okutwalira awamu amangu ddala nga bamaze okuweta n’olugoye lwa asibesito olubikka weld ne okumpi n’ekitundu ky’omusono, obutundutundu obutono obw’okuweta busobola okuteekebwa mu asibesito olugoye okunyogoga mpola mpola.
2.7 Post-Okulongoosa ebbugumu .
Okulongoosa ebbugumu kulina okukolebwa amangu ddala nga omaze okuweta okusobola okuziyiza okulwawo okukutuka, okumalawo situleesi n’okulongoosa microstructure.
