Stainless Simbi Coil 321 ine Yakanakisa Weldability yeKupisa Equipments uye Nzvimbo Inopisa

● Giredhi 321 uye 347 ndiyo inokosha austenitic 18/8 simbi (Grade 304) yakasimbiswa neTitanium (321) kana Niobium (347) kuwedzera. Aya magiredhi anoshandiswa nekuti haanzwe kune intergranular corrosion mushure mekupisa mukati mecarbide kunaya kwe425-850 °C. Giredhi 321 ndiro giredhi resarudzo rekushandisa mutembiricha yemhando inosvika 900 °C, kubatanidza simba repamusoro, kuramba kuyera uye kugadzikana kwechikamu nekupokana nekuzotevera kusvibiswa kwemvura.
Giredhi 321H igadziriso ye321 ine yakakwira kabhoni yemukati, kuti ipe yakavandudzwa-yepamusoro-tembiricha simba.

● Muganho une 321 ndeyekuti titanium haifambisi zvakanaka kune yakakwirira-tembiricha arc, saka haikurudzirwe sewelding inodyiwa. Muchiitiko ichi giredhi 347 rinosarudzwa - iyo niobium inoita zvakafanana carbide kudzikamisa basa asi inogona kutamiswa kune welding arc. Giredhi 347, saka, ndiyo yakajairwa kushandiswa kwewelding 321. Giredhi 347 rinongoshandiswa apo neapo sezvinhu zvembare yevabereki.

● Kufanana nemamwe magiredhi e-austenitic, 321 ne347 vane hunhu hwakanakisa hwekuumba uye welding, ari nyore mabhureki kana roll-kuumbwa uye ane hunhu hwakatanhamara. Post-weld annealing haidiwi. Ivo zvakare vane kusimba kwakanyanya, kunyangwe kusvika kune tembiricha ye cryogenic. Giredhi 321 harina kukwenenzvera zvakanaka, saka harikurudzirwe pakushongedza kwekushandisa.

● Giredhi 304L inowanikwa nyore nyore mumhando dzakawanda dzechigadzirwa, uye saka inowanzo shandiswa pachinzvimbo che321 kana chinodiwa chiri chekuramba kune intergranular corrosion mushure mewelding. Nekudaro, 304L ine yakaderera inopisa simba pane 321 uye saka haisi iyo yakanakisa sarudzo kana chinodiwa chiri kuramba kune inoshanda nharaunda pamusoro pe500 °C.

Key Properties
● Zvivakwa izvi zvinotsanangurwa kune zvigadzirwa zvakafuratirwa (plate, sheet, uye coil) muASTM A240/A240M. Zvakafanana asi zvisingaite zvakafanana zvivakwa zvinotsanangurwa kune zvimwe zvigadzirwa senge pombi uye bhara mune yavo yakatarwa.

Kurwisana Kurwisana
● Yakaenzana neGiredhi 304 mune yakavharwa mamiriro, uye yepamusoro kana weldment mumagiredhi aya isati yaitwa post-weld annealed kana kana application ichisanganisira sevhisi mu425-900 °C renji. Zvichienderana negomba uye kukoromoka kwevhu munzvimbo dzinodziya dzechloride, uye kusimbisa ngura inotsemuka pamusoro pe60 °C. Inofungidzirwa kuti inoshingirira kumvura inonwiwa inosvika 200 mg/L chlorides pane tembiricha yakapoteredza, ichidzika kusvika pa150 mg/L pa60 °C.

Kupisa Kupisa
● Kuramba kwakanaka kweoxidation musevhisi yepakati kusvika ku900 °C uye musevhisi inoenderera kusvika 925 °C. Magiredhi aya anoita zvakanaka muchikamu che425-900 ° C, uye kunyanya apo panowanikwa aqueous corrosive conditions. 321H ine yakanyanya kupisa simba uye inonyanya kukodzera kune yakakwirira-tembiricha zvimiro zvekushandisa.

Kurapa kwekupisa
● Kugadzirisa Kurapa (Annealing) - kupisa kusvika 950-1120 ° C uye kutonhora nokukurumidza nokuda kwekudzivirira kukuru kwekuora.
● Kudzikamisa - kupisa kusvika ku870-900 ° C kweawa imwe pa1mm yehukobvu uye mhepo inotonhorera. Kudzikamisa kunokurudzirwa kune yakanyanya kuomarara sevhisi mamiriro (pamusoro pe25 ° C) uye kunyanya kune zvinhu zvakavharirwa padivi rekumusoro kweiyo annealing tembiricha.
Stress Relief - Heat to 700 °C for 1 to 2 hours and air cool.
These grades cannot be hardened by thermal treatment.

Welding
● Kugoneka kwakanakisa nemaitiro ese akajairwa ekubatanidza, ese ane uye asina masimbi ekuzadza. AS 1554.6 pre-inokodzera welding ye321 uye 347 ine Grade 347 tsvimbo kana electrodes; yakakwira silicon vhezheni ye347 zvakare yakafanokodzera kune welding ye321.

Mechanical Properties
Yakajairika mechanicha zvivakwa zvegiredhi 321 Stainless sheets esimbi inopihwa mutafura 2.

Proper Properties
Zvakajairwa zvimiro zveannealed giredhi 321 Stainless sheets esimbi anopihwa mutafura 3.

Giredhi Specification Kuenzanisa
Kuenzanisa kwegiredhi kuenzaniswa kwe321 Stainless sheets esimbi kunopihwa mutafura 4.

Possible Alternative Grades
Zvinokwanisika mamwe mamakisi kusvika kugiredhi 321 mashizha asina tsvina esimbi anopiwa mutafura 5.

● Mapoposa akawanda emhepo mundege
● Majoini ekuwedzera
● Mvura
● Zvikamu zvevira
● Heating element tubing
● Heat Exchangers
● Zvidzitiro zvakarukwa kana kuti welded for high-temperature mineral processing
● Spiral Welded chubhu yemapombi anopisa neflue