According to the characteristics of the two-phase structure, by properly controlling the chemical composition and heat treatment process, the excellent toughness and weldability of austenitic stainless steel are combined with the higher strength and chloride stress corrosion resistance of ferritic stainless steel, making duplex stainless Intsimbi uhlobo lwentsimbi edibanisa ukunganyangeki ngokupheleleyo, amandla aphezulu kunye nokusebenza ngokulula kunye nemveliso. Their physical properties are between austenitic stainless steel and ferritic stainless steel, but closer to ferritic stainless steel and carbon steel. The resistance to chloride pitting and crevice corrosion of duplex stainless steel is related to the content of chromium, molybdenum and nitrogen. Its resistance to pitting and crevice corrosion can be similar to that of 316 stainless steel, or higher than that of stainless steel for seawater, such as 6%MO austenitic stainless steel. All duplex stainless steels are significantly more resistant to chloride stress corrosion cracking than 300 series austenitic stainless steels, and their strength is also much higher than austenitic stainless steels, while showing good plasticity and toughness.

Chemical composition The main alloying elements of duplex steel are Cr, Ni, Mo and N. Among them, Cr and Mo are used to increase the ferrite content, while Ni and N are austenite stabilizing elements. Amanqanaba ensimbi ayanezinto ezinje ngeMn, Cu, kunye neW. Cr, Ni, kunye neMo zinokuphucula ukumelana nokunganyangeki. Its resistance to pitting and crevice corrosion is particularly good in chloride-containing environments.

Izibonelelo ze-Dupplex intsimbi engenasibala

1. Xa kuthelekiswa nentsimbi engenasitayile

2. Xa kuthelekiswa nentsimbi engenasigaba se-freric, izibonelelo zeDellex ezingenazibala zezi zilandelayo:

1) Iipropathi ezibanzi zoomatshini ziphezulu kunezo zentsimbi ezingenamsebenzi, ngakumbi ubunzima beplastiki. Ayithathwa njengoBrittlet njengentsimbi engenasitayile.

2) Ngaphandle kokunganyangeki koxinzelelo lokunganyangeki, enye inkcaso yendawo yokuhlala yalapha ekhaya ilunge ngakumbi kunentsimbi engenasimo sengqondo esingapheliyo.

I-4) Ukusebenza kwe-welding kubhetele kunentsimbi engenasitayile. Ngokubanzi, akukho nto ifunekayo ngaphambi kokuba i-welding kwaye akukho nyango lobushushu luyafuneka emva kwe-welding.

I-5) Uluhlu lwesicelo libanzi kunelo lentsimbi engenasiseko.

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