F51, F53, F55, F60 uye F61 ane duplex uye super duplex Stainless simbi mazita akatorwa kubva kuASTM A182. Iyi chiyero ndeimwe yeakanyanya kutariswa zviyero zvekupihwa kwesimbi isina tsvina.
IAmerican Society of Testing and Materials (ASTM) nderimwe remasangano makuru epasi rose, kuongorora, kubatanidza uye kushambadza hunyanzvi hwekuita zvekuwedzera kuwanda kwezvinhu. Mamiriro akadhindwa anotanga nevara 'A' simbi inovhara.
Standard ASTM A182 ('Standard Specification yeForged kana Rolled Alloy uye Stainless Steel Pipe Flanges, Forged Fittings, uye Mavharuvhu uye Zvikamu zveHigh-Temperature Service') yave muchikamu chayo chechi19 (2019). Mukufamba kweidzi editions, alloys matsva akawedzerwa uye akagoverwa 'giredhi' nhamba itsva. Iyo 'F' prefix inoratidza kukosha kweiyo mwero kune zvigadzirwa zvefodya. Chivakashure chenhamba chakaiswa muchikamu nemhando yealloy kureva austenitic, martensitic, asi haatauri zvachose. Anodaidzwa kuti 'Ferritic-Austenitic' duplex simbi dzakaverengerwa pakati peF50 neF71, nenhamba dzinokwira pamwe chete dzinoda kusvika kumagiredhi achangowedzerwa.
Iwo Akasiyana Magiredhi eDuplex Stainless Simbi
ASTM A182 F51 yakaenzana neUNS S31803. Aya ndiwo aive mashoko ekutanga e22% Cr duplex stainless simbi. Nekudaro, sezvakatsanangurwa muchinyorwa chakapfuura, vagadziri vakakwenenzvera kuumbwa kusvika kumucheto wepamusoro wemiganho yekuvandudza pitting corrosion resistance. Iri giredhi, rine chirevo chakasimba, chine musoro seF60, yakaenzana neUNS S32205. Nekuda kweizvozvo, S32205 inogona kuve mbiri-yakasimbiswa seS31803 asi kwete vice-versa. Inoverengera 80% yezvese duplex Stainless simbi kugadzirwa. Langley Alloys stocksSanmac 2205, inova Sandvik's proprietary product inopa 'enhanced machinability as standard'. Huwandu hwemasheya edu hunobva pa½ ”kusvika pa450mm dhayamita dzakasimba mabara, pamwe nembariro nendiro zvakare.
ASTM A182 F53 yakaenzana neUNS S32750. Iyi ndiyo 25% Cr super duplex simbi isina tsvina inosimudzirwa zvakanyanya naSandvik seSAF2507. Iine yakawedzera chromium yemukati kana ichienzaniswa neF51 inopa yakagadziridzwa gomba corrosion kuramba. Kusimba kwegoho zvakare kwakakwira, zvichibvumira vagadziri vechikamu kuderedza saizi yechikamu chezvikumbiro zvinotakura. Langley Alloys stocks SAF2507 solid bars kubva kuSandvik, muhukuru kubva pa½” kusvika 16” dhayamita.
ASTM A182 F55 yakaenzana neUNS S32760. Mabviro egiredhi iri anogona kuteverwa kumashure kwekuvandudzwa kweZeron 100 naPlatt & Mather, Manchester UK. Iyo imwe super duplex simbi isina tsvina yakavakirwa pa25% Cr kuumbwa, asi nekuwedzera kwe tungsten. Langley Alloys stocksSAF32760mbariro dzakasimba kubva kuSandvik, muhukuru kubva pa½ "kusvika ku16" dhayamita.
ASTM A182 F61 yakaenzana neUNS S32550. Izvi, zvakare, fungidziro yeFerralium 255, yekutanga super duplex simbi isina tsvina yakagadzirwa na.Langley Alloys. Yakatangwa muna 1969, yakapa makore anopfuura makumi mashanu sevhisi yakabudirira mumhando dzakasiyana siyana dzekunyorera. Kuenzaniswa neF53 uye F55 inopa simba rakawedzerwa uye kuita ngura. Simba rayo shoma regoho rinopfuura 85ksi, nepo mamwe mamakisi anogumira ku80ksi. Mukuwedzera, ine inosvika 2.0% yemhangura, iyo inobatsira pitting corrosion resistance. Langley Alloys stocksFerralium 255-SD50muhukuru kubva pa5/8” kusvika 14” dhayamita yakasimba bar, pamwe nemapuleti anosvika 3” ukobvu.
Nguva yekutumira: Kurume-06-2020