Duplex Steel engatyiwa

Duplex steel stainless grade 2205 (ekwaziwa ngokuba UNS S31803/S32205, ASTM A240 Uhlobo 2205, Inox 2205, AISI 318LN, SUS 329J3L, okanye EN 1.4462) sisigaba ezibini (i-2-fertic alloayteni) malunga ne-2% ye-fertic chromium, 2.5-3.5% molybdenum, 4.5-6.5% nickel, kunye malunga 0.15% nitrogen. I-microstructure yayo elinganayo inika indibaniselwano ekhethekileyo yamandla aphezulu kunye nokumelana nokugqwesa okugqwesileyo. Umzekelo, ibakala lama-2205 lidla ngokuphindwe kabini amandla emveliso ye-316L yensimbi engenasici, evumela abaqulunqi ukuba basebenzise amacandelo amancinci, alula ngaphandle kokuncama ukusebenza.

I-alloy ngokuqhelekileyo ibonelelwa kwimeko yesisombululo-i-annealed (nge-ASTM A240 / A240M) ukuze kugcinwe isakhiwo esifanelekileyo se-duplex. IBanga lama-2205 lihlala liqinile ukusuka kumaqondo obushushu e-cryogenic (malunga ne-50°C) ukuya kuthi ga kwi +300°C; ngaphaya kolu luhlu, isigaba se-sigma esine-brittle singenza kwi-welds. Ezi zakhiwo zenza i-duplex 2205 ibe lolona khetho lubalaseleyo kwizicelo ezifunwayo ezifana nokusetyenzwa kweekhemikhali, i-oyile engaselunxwemeni kunye nerhasi, kunye nemekobume yaselwandle apho zombini amandla aphezulu kunye nokumelana nomhlwa kwekloridi kufuneka.