L485 payipi zitsulo makampani mafuta

L485 chitsulo chapaipi chamakampani amafuta

Kufotokozera Kwachidule:

Kagwiritsidwe:mayendedwe apaipi, mapaipi otenthetsera, hydraulic/automobile pipeline, mafuta/gesi kubowola, chakudya/chakumwa/mkaka, makina opangira mankhwala, migodi, kukongoletsa nyumba, kugwiritsa ntchito mwapadera

Mawonekedwe agawo:kuzungulira

Malo obadwira:Shandong, China

Makulidwe:15-610 mm

Mawonekedwe:lalikulu.Rectangle.Kuzungulira

Ntchito zokonza:kuwotcherera, kukhomerera, kudula, kupindika, kumasula

Titumizireni imelo

Tsatanetsatane wa Zamalonda

Zolemba Zamalonda

L485 Pipeline Steel, Imatanthauza mtundu wachitsulo wokhala ndi zofunikira zapadera zomwe zimagwiritsidwa ntchito potumiza mafuta, gasi ndi mapaipi ena.Malinga makulidwe ndi mapangidwe wotsatira ndi mbali zina, akhoza kupangidwa ndi otentha Kugubuduza mphero, steckel mphero kapena mbale mphero, ndi kupangidwa ndi kuwotcherera ozungulira kapena UOE molunjika msoko kuwotcherera lalikulu awiri zitsulo chitoliro.

Chitsulo cha L485 Pipeline, Chiyambi cha The

Mayendedwe a mapaipi ndi masitima apamtunda, mayendedwe apamsewu waukulu, zoyendera pamadzi ndi zoyendetsa ndege zalembedwa ngati njira zisanu zamakono zoyendera.Kuyambira paipi yoyambilira ya mafakitale mpaka pano, ntchito yomanga mapaipi amafuta ndi gasi yakhala ikutukuka pafupifupi zaka mazana awiri.Kupanga ndi kugwiritsa ntchito zitsulo zapaipi kunayamba mochedwa ku China, ndipo panalibe kupanga zitsulo zenizeni zapaipi isanafike 1985. Komabe, m'zaka zaposachedwa, chitukuko, chitukuko ndi kugwiritsa ntchito zitsulo zamapayipi ku China zakula mofulumira.Ndi kukwezeleza ntchito zazikulu zamapaipi monga mapaipi akumadzulo, mapaipi otumizira gasi ku West-east ndi njira yachiwiri yopatsira gasi kumadzulo-kummawa, kupanga ndi kugwiritsa ntchito chitsulo chapaipi cha X60, X70 ndi X80 chatsirizidwa motsatizanatsatizana, ndipo zotsatira za kafukufukuyu. za X100 ndi X120 zapezeka.

Chitsulo cha L485 Pipeline, Mitundu ya Minofu

L485 Pipeline Steel, Kapangidwe kabungwe ndiye maziko otsimikizira momwe amagwirira ntchito komanso ntchito yotetezeka.Pakadali pano, zitsulo zamapaipi zitha kugawidwa m'magulu anayi otsatirawa malinga ndi microstructure yawo:

1. Ferritic pearlite pipeline zitsulo
Chitsulo cha payipi ya ferritic pearlite ndiye maziko azitsulo zamapaipi opangidwa zaka za m'ma 1960 zisanachitike.X52 ndi chitsulo chapaipi chokhala ndi mphamvu zochepa zonse ndi pearlite ya ferritic.Zigawo zake zoyambira ndi kaboni ndi manganese, ndipo zomwe zili ndi kaboni (gawo lalikulu, zomwe zili pansipa) ndi 0,10% mpaka 0.20%, ndipo manganese ndi 1.30% mpaka 1.70%.Nthawi zambiri ntchito yotentha yogudubuzika kapena yotentha njira yopanga mankhwala.Pakafunika mphamvu zambiri, malire apamwamba a carbon ndi ofunika, kapena trace niobium ndi vanadium amawonjezeredwa ku dongosolo la manganese.Zitsulo zamapaipi amtundu wa pearlite nthawi zambiri amawonedwa kuti ali ndi polygonal ferrite ndi kukula kwa tirigu pafupifupi 7μm ndi pearlite yokhala ndi gawo laling'ono pafupifupi 30%.Zitsulo wamba ferritic pearlite mapaipi ndi 5LB, X42, X52, X60, X60 ndi X70.

2. Acicular ferrite pipeline zitsulo
Kafukufuku wa chitsulo cha acicular ferritic pipeline adayamba kumapeto kwa zaka za m'ma 1960 ndipo adayikidwa m'mafakitale kumayambiriro kwa zaka za m'ma 1970.Panthawiyo, manganese - niobium system yochokera pa E idapanga mpweya wochepa.Mu mn-Mo-Nb microalloy payipi zitsulo, Kuwonjezera molybdenum akhoza kuchepetsa kusintha kutentha ziletsa polygonal ferrite mapangidwe, kulimbikitsa acicular ferrite kusintha, ndi kusintha mpweya kulimbitsa zotsatira za mpweya ndi niobium nitride, kuti kuonjezera mphamvu ya chitsulo. ndi kuchepetsa kuuma ndi brittle-kusintha kutentha.Tekinoloje ya alloying ya molybdenum yakhala ikupanga kwa zaka pafupifupi 40.M'zaka zaposachedwa, teknoloji ina yotentha kwambiri yopezera acicular ferrite ikuwonekera.Itha kupeza acicular ferrite pa kutentha kwapamwamba kwambiri pogwiritsa ntchito ukadaulo wapamwamba wa niobium alloying.Zitsulo wamba acicular ferrite mapaipi ndi X70 ndi X80.

3. Bainite - martensite pipeline zitsulo
Ndi chitukuko cha kuthamanga kwambiri ndi otaya lalikulu gasi payipi zitsulo zitsulo ndi kufunafuna kuchepetsa mtengo wa kumanga mapaipi, acicular ferrite dongosolo sangathe kukwaniritsa zofunika.Chakumapeto kwa zaka za m'ma 1900, panali mtundu wina wa chitsulo chapaipi champhamvu kwambiri.Zitsulo zodziwika bwino ndi X100 ndi X120.X100 idanenedwa koyamba ndi SMI ku Japan mu 1988. Pambuyo pazaka za kafukufuku ndi chitukuko, chitoliro cha X100 chinayikidwa koyamba mu gawo la mayeso a uinjiniya mu 2002. ExxonMobil yaku United States idayambitsa kafukufuku pazitsulo zamapaipi a X120 mu 1993, ndipo mu 1996, idagwirizana ndi SMI ndi NSC yaku Japan kuti ilimbikitse limodzi kafukufuku wa X120.Mu 2004, chitsulo cha X120 chinayikidwa kwa nthawi yoyamba mu gawo loyendetsa payipi.

Mu kapangidwe ka chitsulo cha bainite-martensitic pipeline, kuphatikiza kwabwino kwa carbon - manganese - copper - nickel - molybdenum - niobium - vanadium - titanium - boron kwasankhidwa.Mapangidwe a alloy awa amagwiritsira ntchito mokwanira makhalidwe ofunikira a boron mu mphamvu ya kusintha kwa gawo.Kuwonjezeredwa kwa trace boron (ωB=0.0005% ~ 0.003%) mwachiwonekere kungalepheretse kukhazikika kwa ferrite pamalire ambewu ya austenite ndikupangitsa kuti khola la ferrite lisunthike kumanja mwachiwonekere. bainite transition curve imaphwanyidwa ndikutsitsa kutentha komaliza kozizira (& LT; 300 ℃) komanso kuzizira bwino (> 20 ℃/s), kutsika kwa bainite ndi kapangidwe ka lath martensite kumathanso kupezeka.Zitsulo zodziwika bwino za bainite-martensite (B -- M) ndi X100 ndi X120.

4. Chitsulo chachitsulo cha sophorite
Ndi chitukuko cha anthu, zitsulo zamapayipi zimafunika kuti zikhale ndi mphamvu zapamwamba komanso zolimba.Ngati olamulira akugubuduza ndi kuzirala luso sangathe kukwaniritsa zofunika zimenezi, ndi kutentha ndondomeko quenching okhwima ndi tempering akhoza anatengera kukwaniritsa zofunika zonse za khoma wandiweyani, mphamvu mkulu ndi kulimba mokwanira kupanga wokwiya sorbitite.Mu pipeline steel, homogenous sortensite iyi, yomwe imadziwikanso kuti homogenous martensite, ndi mtundu wabungwe wa chitsulo champhamvu kwambiri chapaipi X120.

Chemical Composition

L245 Pipeline Steel, Kunenepa kowerengera :[(m'mimba mwake - makulidwe a khoma)* makulidwe a khoma]* 0.02466=kg/m (kulemera pa mita)

Kapangidwe ka mankhwala (chigawo chambiri)…/%															mpweya wofanana (CEV) %
C	Si	Mn	P	S	Nb	V	Ti	Cr	Ni	Cu	N	Mo	B	Als
zochepa kuposa kapena zofanana															zochepa kuposa kapena zofanana
Q345	A	0.2	0.5	1.7	0.035	0.035				0.3	0.5	0.2	0.012	0.1			0.45
	B				0.035	0.035
	C				0.03	0.03	0.07	0.15	0.2							0.015
	D	0.18			0.03	0.025
	E				0.025	0.02
Q390	A	0.2	0.5	1.7	0.035	0.035	0.07	0.2	0.2	0.3	0.5	0.2	0.015	0.1			0.46
	B				0.035	0.035
	C				0.03	0.03										0.015
	D				0.03	0.025
	E				0.025	0.02
Q420	A	0.2	0.5	1.7	0.035	0.035	0.07	0.2	0.2	0.3	0.8	0.2	0.015	0.2			0.48
	B				0.035	0.035										0.015
	C				0.03	0.03
	D				0.03	0.025
	E				25	0.02
Q450	C	0.2	0.6	1.8	0.03	0.03	0.11	0.2	0.2	0.3	0.8	0.2	0.015	0.2	0.005	0.015	0.53
	D				0.03	0.025
	E				0.025	0.02