Farqiga u dhexeeya heerarka iyo booska
GB/T 9948: Waxaa lagu dabaqi karaa tuubooyinka birta ah ee aan kala go 'lahayn xaaladaha heerkulka dhexdhexaadka ah iyo kuwa sare (≤500℃) sidadildilaaca batroolkaiyoqalabka kiimikada, waxayna ka tirsan tahay heerka tuubada gaarka ah.
GB/T 5310: Si gaar ah loogu talagalaykuleyliyeyaasha cadaadiska sare leh(cabbirrada uumiga ≥9.8MPa), waxay xoogga saartaa badbaadada muddada dheer heerkulka sare iyo cadaadiska sare waana heerka ugu muhiimsan ee tuubooyinka kuleyliyaha.
Farqiga ugu muhiimsan ee agabka iyo waxqabadka
Halabuurka kiimikada
Marka la barbar dhigo 20 bir ah,20GBirtu waxay leedahay xakameyn adag oo ku saabsan wasakhda (sida P≤0.025%, S≤0.015%), waxayna u baahan tahay wadarta guud ee walxaha haraaga ah (Cu, Cr, Ni, iwm.) inay noqoto ≤0.70% si loo hubiyo xasilloonida heerkulka sare.
Sifooyinka farsamada
Xoogga jiidista heerkulka qolka ee 20G (410-550MPa) wuxuu u muuqdaa inuu la mid yahay kan 20 bir ah (≥410MPa), laakiin 20G waxay u baahan tahay inay si dheeraad ah u hubiso xoogga adkeysiga heerkulka sare ee 450℃ (≥110MPa), taas oo ah shuruudaha ugu muhiimsan ee tuubooyinka kuleyliyaha.
Qaab-dhismeedka Yar
20G waxay u baahan tahay in la baaro heerka spheroidization ee pearlite (≤ heerka 4) si looga hortago burburka qaab-dhismeedka microstructure ka dib adeeg heerkul sare oo muddo dheer ah, halka birta 20G aysan lahayn shuruud noocaas ah.
Kala duwanaanshaha habka wax soo saarka
Daaweynta kulaylka
20G waa in la mariyo daaweyn caadi ah (Ac3+30℃) si loo hubiyo in cabbirka hadhuudhku yahay heerka 5-8. 20 bir ah ayaa la damin karaa ama la caadiyeyn karaa, xakamaynta hab-socodkuna waa mid dabacsan.
Tijaabo aan burburin
20G waxay u baahan tahay ogaanshaha cilladaha ultrasonic-ka shaqsiga ah iyo baaritaanka hadda ee eddy current ee gabal kasta, halka birta 20G badanaa ay u baahan tahay oo keliya kormeerka muunadda.
Isbarbardhigga xaaladaha codsiga
20GKuleyliyaha saldhigga korontada (derbiyada biyaha qaboojiya, kuleyliyeyaasha aadka u sarreeya), falgalayaasha kiimikada ee cadaadiska sare leh (xaalado leh heerkul naqshadeed > 350℃)
20 bir ahXirmooyinka tuubooyinka ee loogu talagalay kuleylinta foornada ee warshadaha sifeynta, dhuumaha loogu talagalay qaybaha hawada iyo qalabka nadiifinta faakuumka (heerkulka badanaa < 350℃)
Shuruudaha Shahaadada
Tuubooyinka birta ah ee 20G waxay u baahan yihiin inay helaan Ruqsadda Soo-saarka Qalabka Gaarka ah (shahaadada TS), dufcad kastana waa inay bixisaa warbixin tijaabo ah oo ku saabsan waxqabadka heerkulka sare. 20 bir waxay u baahan tahay oo keliya shahaadada dammaanadda tayada caadiga ah.
Talo soo jeedin ku saabsan xulashada:
Marka ay timaado mashaariicda shahaadeynta ASME ama PED, 20G waxay u dhigantaaSA-106B/ASTM A192, halka 20 bir ah aysan lahayn wax isgaarsiin toos ah oo la xiriirta agabka caadiga ah ee Mareykanka.
Xaaladaha shaqada ee ka sarreeya 540℃, waa in la tixgeliyaa biraha dahaarka leh sida 12Cr1MoVG. Xadka sare ee heerkulka khuseeya 20G waa 480℃ (barta muhiimka ah ee garaafka birta kaarboon).
Waqtiga boostada: Maajo-23-2025
