Composition Optimization of DZ466 Alloy Based on Combustion Gas Hot Corrosion Resistance
Author of the article:LUO Liang;LI Qing;REN Weipeng;XIAO Chengbo;DAI Shenglong
Author's Workplace：Key Laboratory of Advanced High Temperature Structural Materials,Beijing Institute of Aeronautical Materials,AECC,Beijing 100095,China
Key Words：gas corrosion resistance alloy DZ466 composition mechanical properties
Abstract：Four kinds of test alloy A1,A2,A3 and A4 were obtained by adjusting the contents of Cr,Al and Ti on the basis of the composition of DZ466 alloy.The thermal corrosion resistance of the test alloy and the base alloy(DZ466(A0)and DS GTD111)under the condition of 900℃/100 h gas corrosion was compared,and the influence of the composition change on the mechanical properties of the alloy was studied.The results show that the corrosion dynamics curve of A1 is parabolic,and its resistance to gas thermal corrosion is better than that of other experimental alloys,DZ466(A0)and DS GTD111.The corrosion product types of A1 and DZ466(A0)alloy are similar,and A2,A3,A4 and DS GTD111 have similar corrosion product types.A1 alloy has relatively good tensile strength at room temperature,durability and plasticity at 950℃/220 MPa,and its overall performance is the best among the four test alloys.The optimal combination of mechanical properties and thermal corrosion resistance of gas is obtained.
