304 bir ah oo dhumuc weyn leh tuuboisbarbardhigga alxanka ka hor iyo ka dib daaweynta dusha iyo habaynta ayaa muujinaya in: habkani wuxuu ka takhalusi karaa miisaanka iyo midabka xanaaqa.

Marka dadku ay kor u qaadaan 304 ahamaama birta qaro weyn ee tuubada oksaydhka ee nuxurka chromium oxide, qaab dhismeedka lakabka oksaydhka ka dib hagaajinta, waxaad si weyn u wanaajin kartaa waxqabadka daxalka ee 304 birta qaro weyn ee tuubada dusha sare leh.By hababka daaweynta kiimikaad si loo gaaro 304 ahama birta tuubo qaro qaro weyn tuubo si loo hagaajiyo iska caabinta daxalka ee dusha laba tallaabo ah.Xataa 304 bir qaro weyn leh oo alxanka tuubada ah ee habkan ayaa sidoo kale loo isticmaali karaa si loo hagaajiyo caabbinta daxalka.

Marka 304 birta qaro weyn leh ee tuubada dusha sare ee caabbinta daxalka aysan ku filneyn, khabiirka daaweynta dusha ee shirkadda Poligrat Munich ayaa horumarisay tignoolajiyada Polinox Protec TC waxay kaa caawin kartaa inaad xalliso dhibaatadan.Qalabka mashiinka iyo alaab-qeybiyeyaasha kiimikadu waxay horumariyeen tignoolajiyada si loo hagaajiyo nikkel, molybdenum iyo chromium austenitic aluminium aluminium ah, taas oo hagaajinaysa iska caabbinta daxalka ee 304 dusha tuubada birta qaro weyn leh.Iyada oo loo marayo laba tillaabo ayaa lagu kordhin karaa 304 ahama birta dhumucdiisuna waxay tahay lakabka sare ee oksaydhka ee iska caabinta daxalka.

Talaabada ugu horeysa ee isticmaalka dareeraha dabiiciga ah ee biyaha ku salaysan ee 304 ahamaama birta dusha sare ee gidaarka leh ayaa dusha lagu daaweeyaa.Daaweynta dusha sare waxay socon doontaa 3 ~ 5 saacadood.Inta lagu jiro waqtigan, ka saar lakabka oksaydhka dusha qaybta birta, iyadoo la dhimay birta, chromium iyo saamiga birta ayaa kordhay 6% ilaa 8%, door firfircoon oo lagu hagaajinayo iska caabbinta daxalka ayaa leh.

Tallaabada labaad ee lagu hagaajinayo qaab dhismeedka lakabka oksaydhka dusha sare.Tani waxay sii wanaajisaa iska caabbinta daxalka ee lakabka oksaydhka.Saamayn qaab dhismeedka lakabka oxide ee dusha sare waa tallaabo daaweynta kulaylka: iyadoo loo eegayo nooca daawaynta iyo kulaylka ee lakabka crystal ee shayga hawada ku jira 140℃~ 200℃gudaha