Duplex Stainless Hlau Castings

Duplex Stainless hlau(DSS) yog hais txog ib pawg ntawm stainless hlau nrog metallographic microstructure ntawm ob qho tib si ferrite thiab austenite txhua tus accounting txog li 50%. Feem ntau, cov ntsiab lus ntawm cov theem tsawg yuav tsum muaj tsawg kawg yog 30%. Nyob rau hauv cov ntaub ntawv ntawm cov pa roj carbon tsawg, cov ntsiab lus Cr yog 18% mus rau 28%, thiab Ni cov ntsiab lus yog 3% mus rau 10%. Ib co duplex stainless hlau kuj muaj alloying ntsiab xws li Mo, Cu, Nb, Ti, thiab N. Lub DSS muaj cov yam ntxwv ntawm austenitic thiab ferritic stainless hlau. Piv nrog rau ferrite, nws muaj ntau dua plasticity thiab ductility, tsis muaj chav kub brittleness, thiab txhim kho intergranular corrosion kuj thiab vuam kev ua tau zoo, thaum tseem tuav brittleness, siab thermal conductivity, thiab superplasticity li ferrite stainless hlau. Piv nrogaustenitic stainless hlau, DSS muaj lub zog siab thiab txhim kho kev ua haujlwm zoo rau intergranular corrosion thiab chloride stress corrosion. Duplex stainless hlau muaj zoo heev pitting corrosion kuj thiab kuj yog ib tug nickel-txuag stainless hlau. Muaj qib ntawm duplex stainless hlau cam khwb cia los ntawm poob ciab peev casting: 1.4460, 1.4462, 1.4468, 1.4469, 1.4517, 1.4770, A 890 1C, A 890 1A, A 890 9A, A4A 995 1B, A 995 4A, A 995 5A, 2205, 2507, 022Cr22Ni5Mo3N, 022Cr25Ni6Mo2N