I-F65/UNS S32906 Insimbi Engagqwali

I-UNS S32906/F65 iyi-high-alloy duplex (i-austenitic-ferritic) insimbi engagqwali ekwazi ukumelana nokugqwala okuhle kakhulu endaweni ye-caustic nasezindaweni ezine-chloride. Ngaphezu kwalokho, inezici ezingezansi:

  • Ukumelana okuvelele ezindaweni ezibangelwa yi-caustic, nalapho kukhona ukungcola okufana nama-chloride
  • Ukumelana kahle nokugqwala kwe-intergranular
  • Ukumelana okuhle kakhulu ne-pitting kanye nokugqwala kwe-crevice
  • Ukumelana okuphezulu ne-Stress corrosion cracking (SCC)
  • Ukushisela okuhle
  • Amandla aphezulu kakhulu. Amandla okufakaza aphakeme ngokuphindwe kathathu kunawensimbi evamile ye-austenitic.

Ukwakhiwa kwamakhemikhali:

C Si Mn P S Cr Ni Mo Cu N
≤0.030 0.3 1.0 ≤0.030 ≤0.015 29 7 2.3 ≤0.80 0.35

Izici zemishini:

  1. Ku-20°C (68°F):

Ukujiya kodonga

 Amandla obufakazi amandla eqine Ukuphakanyiswa

Rp0.2

 Rm

A

mm

MPA

 ksi MPA ksi

%

imiz

 min. min. min.

min.

650

 94 800 116

25
≥10 550 80 750 109

25

1 MPa = 1 N/mm2
a) Rp0.2 ihambisana no-0.2% wamandla esivuno se-offset.
b) Ngokusekelwe ku-L0 = 5.65 √S0 lapho L0 ubude begeji yokuqala kanye no-S0 indawo yokuqala ye-cross-section.

     2. Emazingeni okushisa aphezulu:

Temperature Ukujiya kodonga Amandla obufakazi Amandla eqine, Ukuphakanyiswa

° C

 mm Rp0.2 Rm A

MPA

 MPA %

min.

 min.

imiz

100

550 750

25

≥10

 500 730

25
200 470 720

25

≥10

 430 700

25

300

450 710

25
≥10 410 690

25

I-General Corrosion kanye ne-Microstructure
I-UNS S32906 ibonisa izakhiwo ezinhle kakhulu zokumelana nokugqwala ngenxa yokuqukethwe okuphezulu kwezakhi ze-alloying, ukungcola okuphansi nokulawulwa kokwelashwa kokushisa phakathi nenqubo yokukhiqiza ukuze kuqinisekiswe ukungabikho kwemvula eyingozi nezigaba ze-intermetallic.

Ngesikhathi esifanayo, isakhiwo sayo se-duplex (austenitic-ferritic) esinokuqukethwe kwe-ferrite ebangeni lama-40-60% sinquma ukuthi i-microstructure yayo ayinazo izigaba ezilimazayo ze-intermetallic.

I-Intergranular Corrosion
I-F65/UNS S32906 ikhombisa ukumelana okuhle kakhulu nokugqwala kwe-intergranular futhi idlula ukuhambisana nezinkambiso ezijwayelekile zokuhlolwa kwe-Huey (i-ASTM A262 umkhuba C, 5 x 48h ekubilisweni kwe-HNO3) noma ukuhlolwa kwe-Streicher (umkhuba we-ASTM A262 B, 120h ekubiliseni i-H2SO4 + FeSO4) .

Amafomu emikhiqizo etholakalayo:

Ipayipi, Ishubhu: ASTM A268, ASTM A789, ASTM A790, ASTM A511, ASME SA268

Ipuleti, Ishidi, Ikhoyili: ASTM A240

Indawo: ASTM A479

Izicelo:

  • Ukukhiqizwa kwesoda ye-Caustic: i-material ilungele ukusetshenziswa ezinhlelweni zamapayipi ukusuka kumaseli ukuya esitshalweni sokuhwamuka.
  • Futhi kuyisinqumo esihle kakhulu ezimweni ezinolaka kakhulu, njengamashubhu e-evaporator, kuzo zombili izinqubo ze-diaphragm ne-membrane.
  • Ukukhiqizwa kwe-alumina: amashubhu okushintshanisa ukushisa namapayipi ekugayeni kwe-alumina
  • Izindawo lapho ukumelana okuphezulu kokubhoboza kanye nokugqwala kwemigodi kuyadingeka