1. Hunhu hwekushanda, mashandisirwo uye mamiriro ezvinhu anoshanda
SA302GrB iplate yesimbi ine simba rakaderera remanganese-molybdenum-nickel alloy, iri pasi peASTM A302 standard uye yakagadzirirwa michina inodziya zvakanyanya uye ine simba rakawanda senge midziyo inodzvanywa nemhepo nemaboiler. Hunhu hwayo hukuru hwekushanda hunosanganisira:
Hunhu hwakanaka hwemakanika: simba rekudhonza ≥550 MPa, simba rekupa ≥345 MPa, kureba ≥18%, uye kusimba kwesimba remagetsi kunoenderana neASTM A20 standard.
Kushanda zvakanaka kwewelding: kunotsigira welding ye arc nemaoko, welding ye arc iri pasi pevhu, welding ine gasi uye mamwe maitiro, uye kupisa nekupisa zvinodiwa mushure mekuwelding kudzivirira kutsemuka.
Kuramba kupisa kwakanyanya uye kuramba ngura: Inoramba yakagadzikana mukati mehurefu hwekupisa kwekushanda kubva -20℃ kusvika 450℃, yakakodzera nzvimbo dzinopisa dzakadai seacids nealkalis.
Huremu hwakareruka uye hwakasimba: Nekugadzira dhizaini isina kusimba, ukuwo ichideredza huremu hwechivakwa, kugona kwekutakura pressure kunovandudzwa uye mutengo wekugadzira michina unoderedzwa.
Mamiriro ezvinhu anoshanda: michina mikuru muminda yemafuta, mabhoyira emagetsi, magwenya esimba renyukireya, kugadzira simba remvura, nezvimwewo, zvakaita semareactor, ma heat exchangers, matangi akatenderera, midziyo yekumanikidza yenyukireya, madhiramu ebhoyira, nezvimwewo.
2. Zvikamu zvikuru, ma parameter ekushanda uye hunhu hwemakanika
Kuumbwa kwemakemikari (kuongorora kunyunguduka):
C (kabhoni): ≤0.25% (≤0.20% kana ukobvu hwacho ≤25mm)
Mn (manganese): 1.07%-1.62% (1.15%-1.50% kana ukobvu hwacho huri ≤25mm)
P (phosphorus): ≤0.035% (zvimwe zviyero zvinoda ≤0.025%)
S (sarufa): ≤0.035% (zvimwe zviyero zvinoda ≤0.025%)
Si (silicon): 0.13%-0.45%
Mo (molybdenum): 0.41%-0.64% (zvimwe zvinodiwa zvinoda 0.45%-0.60%)
Ni (nickel): 0.40%-0.70% (humwe ukobvu)
Magadzirirwo ekushanda:
Simba rekudhonza: 550-690 MPa (80-100 ksi)
Simba rekupa: ≥345 MPa (50 ksi)
Kureba: ≥15% kana kureba kwegeji kuri 200mm, ≥18% kana kureba kwegeji kuri 50mm
Mamiriro ekurapa kupisa: Kuendeswa mumamiriro ekugadzirisa, kugadzirisa + kudziya kana kudzora, kugadzirisa kunodiwa kana ukobvu hwacho hwapfuura 50mm.
Zvakanakira mashandiro emakanika:
Kusimba kwakanyanya uye kusimba: Pasimba rekudhonza re550-690 MPa, richiri kuramba rakareba re ≥18%, zvichiita kuti michina ikwanise kuramba kutyoka.
Maumbirwo ezviyo zvakapfava: Zvinosangana nezvinodiwa zvehukuru hwezviyo zvakapfava zveA20/A20M standard uye zvinovandudza kusimba kwekupisa kushoma.
3. Nyaya dzekushandisa uye zvakanakira
Indasitiri yePetrochemical:
Muenzaniso wekushandisa: Kambani yepetrochemical inoshandisa maplate esimbi eSA302GrB kugadzira mareactor ane simba guru, ayo anga achishanda kwemakore mashanu pa400℃ uye 30 MPa asina kutsemuka kana kuchinja.
Zvakanakira: Kuramba hydrogen ngura zvakanaka, uye kuona zvikanganiso zve ultrasonic 100% kunoita kuti michina ive yakachengeteka.
Munda wesimba renyukireya:
Nyaya yekushandisa: Chigadziko chekumanikidza chereactor chemagetsi enyukireya chinoshandisa ndiro yesimbi yeSA302GrB ine ukobvu hwe120mm. Kuburikidza nekurapa kwe normalizing + tempering, resistance yemwaranzi inovandudzwa ne30%.
Zvakanakira: Huremu hweMolybdenum hwe0.45%-0.60% hunodzivirira kusviba kwemwaranzi ye neutron uye hunosangana nezvinodiwa neASME specifications.
Munda weboira wechiteshi chemagetsi:
Maitiro ekushandisa: Dhiramu rebhoyira rinoshandisa simbi yeSA302GrB, iyo inoshanda pa540℃ uye 25 MPa, uye hupenyu hwayo hwekushanda hunowedzerwa kusvika kumakore makumi matatu.
Zvakanakira: Simba rekupisa kwakanyanya rinosvika 690 MPa, iro rakareruka ne15% pane simbi yekabhoni uye rinoderedza kushandiswa kwesimba.
Munda wekugadzira simba remvura:
Maitiro ekushandisa: Pombi yemvura ine simba guru yechiteshi chemagetsi emvura inoshandisa simbi yeSA302GrB uye inopfuura nemiyedzo yekuneta inosvika 200,000 munzvimbo ye -20℃ kusvika 50℃.
Zvakanakira: Kusimba kwekupisa kwakaderera (≥27 J pa -20℃) kunosangana nemamiriro ekunze akanyanya kudiwa munzvimbo dzine makomo.
4. Kuchengetedzeka, kuchengetedzwa kwezvakatipoteredza uye kukosha kwemaindasitiri
Kuchengetedzeka:
Ndakapasa bvunzo yeASTM A20 (V-notch impact energy ≥34 J pa -20℃), zvichiita kuti njodzi yekutyoka kwebrittle break ipfuure 0.1%.
Kuoma kwenzvimbo inobatwa nekupisa ye weld ndeye ≤350 HV kudzivirira kutsemuka kunokonzerwa ne hydrogen.
Kudzivirirwa kwezvakatipoteredza:
Kuwanda kwemolybdenum kuri pakati pe0.41% ne0.64% kunoderedza kushandiswa kwenickel uye kunoderedza kuburitswa kwesimbi inorema.
Inotevedzera murayiro weEU RoHS uye inorambidza kushandiswa kwezvinhu zvinokuvadza zvakaita se lead ne mercury.
Kukosha kwemaindasitiri:
Inopa 25% yemusika wepasi rose wesimbi yesimbi inoshandiswa mumidziyo yepressure uye chinhu chakakosha pakushandiswa kwesimba renyukireya nemidziyo yepetrochemical.
Inotsigira kushandiswa kwemhando dzakasiyana dzekupisa kubva pa -20℃ kusvika 450℃, uye inovandudza mashandiro emidziyo ne15%-20% kana tichienzanisa nesimbi yekabhoni yechinyakare.
Mhedziso
Ndiro yesimbi yeSA302GrB yave chinhu chikuru mumidziyo yemazuva ano inodziya zvakanyanya uye ine simba guru nekuda kwesimba rayo guru, kuramba ngura uye nyore kusanganisa. Kuenzana kwayo mukuchengetedza, kuchengetedzwa kwezvakatipoteredza uye kushanda zvakanaka kwemari kunoita kuti isatsiviwe muminda yesimba renyukireya, petrochemicals, simba, nezvimwewo, uye iri kutungamira kugadzirwa kwemidziyo yeindasitiri kuenda kunzira inoshanda uye yakachengeteka.
Nguva yekutumira: Chikumi-04-2025