1. Imigangatho yokuphunyezwa
Qinisekisa inguqu yamva nje ye-ASTM A333 / A 333M (i-chemical composition of the version emva kwe-2016 ihlengahlengiswa, kwaye izithintelo ezintsha zezinto ezifana ne-Cr, i-Ni, kunye ne-Mo zongezwa).
2. Ukulawulwa kokwakheka kweekhemikhali
Imida yezinto eziphambili:
C≤0.30% (ikhabhoni ephantsi iqinisekisa ukuqina), Mn 0.29-1.06% (ukulungiswa kunye nomxholo weC), P≤0.025%, S≤0.025% (ukunciphisa ngokuthe ngqo izinto ezinobungozi).
Inguqulo ka-2016 yongeza imida ephezulu ye-Ni, Cr, Mo, njl. (efana ne-Ni≤0.40%), kwaye kuyimfuneko ukujonga ukuba ngaba incwadi yewaranti imakishwe nge-carbon equivalent (CET).
Ukuphuculwa kwezinto eziphathekayo: Inguqulelo entsha ye-A333GR6 iye yaphuculwa ukusuka kwi-C-Mn yensimbi ukuya kwintsimbi ephantsi ye-alloy, kunye nokusebenza okungcono.
1. Iimpawu zoomatshini
Amandla okuqina ≥415MPa, amandla esivuno ≥240MPa, umlinganiselo wamandla esivuno esiphantsi (ukubonisa isakhono soguqulo lweplastiki)
Uvavanyo lwempembelelo yobushushu obuphantsi:
Ubushushu bovavanyo luyahluka kunye nobukhulu bodonga (olufana ne -45℃~-52℃), kwaye iimfuno zekhontrakthi mazichazwe ngokucacileyo.
Ixabiso lamandla empembelelo kufuneka lihlangabezane nomgangatho, ngokuqhelekileyo lifuna ≥20J (jonga kwi-ASTM A333 ngeenkcukacha).
2. Ubume be-metallographic
Umbuso wokubonelela kufuneka ube yi-ferrite efanayo + i-pearlite, kunye nobukhulu obuziinkozo be-7 ~ 9 (iinkozo ezinqabileyo zinganciphisa umlinganiselo wamandla esivuno).
Ngokukhethekileyo khetha iibhobho zentsimbi eziye zacinywa + zinomsindo (isakhiwo sinomoya we-troostite, kwaye ukuqina kobushushu obuphantsi kungcono).
Inkqubo yonyango lobushushu
Iirekhodi zokunyanga ubushushu kufuneka zinikezelwe: ukufudumeza ≥815℃→ukucima amanzi→ukufudumala ukuqinisekisa ukufana kwesakhiwo.
Kuphephe ukunyangwa okanye ukuphathwa ngendlela engafanelekanga imeko yantlandlolo (isakhiwo esirhabaxa sikhokelela kubushushu obuphantsi).
Ubume bokuhanjiswa
Idla ngokusiwa kwimeko eqhelekileyo + enomsindo okanye ecikiziweyo + enomsindo, ekufuneka icaciswe kwisivumelwano.
1. Ubukhulu bendonga kunye nefuthe lokulungelelanisa ubushushu
Umzekelo: xa ubukhulu bodonga buyi-7.62mm, ubushushu bokuvavanya impembelelo kufuneka bufikelele -52 ℃ (ngaphantsi komgangatho -45℃).
Iimpawu eziqhelekileyo zendawo: 8-1240mm×1-200mm (SCH5S-XXS), iimfuno zangempela kufuneka zihlolwe.
2. Enye imathiriyeli efanayo
A333GR6≈X42N/L290N/API 5L B PSL2 (umbhobho womgca), kodwa kuyimfuneko ukuqinisekisa ukuba ukusebenza kweqondo lokushisa eliphantsi kudibene.
Kufuneka-tshekishwe amaxwebhu
Ukuqinisekiswa kwezinto eziphathekayo (i-MTC), ingxelo yonyango lokushisa, ingxelo yokuvavanya impembelelo yokushisa ephantsi, ingxelo yovavanyo olungonakalisi (UT / RT).
Emva kwenguqulo ka-2016, idatha yovavanyo yezinto ezisanda kufakwa ze-alloy (Ni, Cr, njl.) mazifakwe.
Ukuhlolwa kwakhona komntu wesithathu
Kucetyiswa ukuba kuhlolwe kwakhona izinto eziphambili (ezifana novavanyo lwempembelelo, ukubunjwa kweekhemikhali) ngesampuli, ngakumbi kwizicelo ezinomngcipheko omkhulu (njengemibhobho ye-LNG).
Uluhlu lobushushu
Ubushushu obuyiliweyo bokusebenza ≥-45℃, iimeko zobushushu obuphantsi kakhulu (ezinje -195℃) zifuna ukuvavanya ukuba ibakala eliphezulu (elifana ne-A333GR3/GR8) liyafuneka.
Isicelo seshishini
I-Petrochemical (i-ethylene, i-LNG), izixhobo zefriji, imibhobho ye-cryogenic, njl., kufuneka ithathele ingqalelo ukhuseleko olongezelelweyo (njengokugquma) ngokugqwesa okuphakathi.
Iziqinisekiso kunye nokusebenza
Ngokukhethekileyo khetha abavelisi abaneziqinisekiso zemveliso ye-ASTM A333, kwaye ufuna iimeko zokubonelela ngeeprojekthi ezifanayo.
Kulumkele ukuziphatha kwe-"OEM" yabarhwebi kwaye uqinisekise amaxwebhu ewaranti yasefektri yokuqala.
Ixabiso kunye nexesha lokuhambisa
Inguqulo ye-alloy ephantsi (ngaphambi kwe-2016) ingaba nexabiso eliphantsi, kodwa umehluko wentsebenzo mkhulu, kwaye kufuneka kwenziwe iindleko ezibanzi.
Iimpawu ezikhethekileyo (ezifana nemibhobho enodonga olungqingqwa obubanzi obukhulu) kunokufuneka ukuba zenziwe ngokwezifiso, zandiswe umjikelo wokuhanjiswa.
Umngcipheko wokudideka: Musa ukudibanisa i-A333GR6 kunye ne-A335GR6 (intsimbi ye-chromium-molybdenum yokushisa okuphezulu).
Uluhlu oludala olusemgangathweni: Qinisekisa ukuba umbhobho wensimbi uveliswa emva kwenguqu ye-2016 ukuphepha izinto ze-alloy zemveliso yemigangatho yakudala engahambelani nemigangatho.
Inkqubo ye-Welding: I-low-temperature ye-welding yensimbi yokushisa idinga izinto ezihambelana ne-welding (ezifana ne-ENiCrMo-3), kwaye umthengisi kufuneka anike isikhokelo se-welding.
Ngala manqaku angasentla, umthengi unokuvavanya ngokucwangcisiweyo ukuthotyelwa, ukuhambelana nokusebenza kunye nokuthembeka komthengisi we-A333GR6 umbhobho we-alloy ukuqinisekisa ukhuseleko kunye noqoqosho lweprojekthi.
Ixesha lokuposa: Jun-12-2025
