A kind of preparation method of alfenimonb modified 904l alloy applied in oxygen-containing high-temperature chlorine corrosion environment
A chlorine corrosion and alloy technology, which is applied in the field of high temperature chlorine corrosion resistant alloy component design and performance testing, can solve problems such as high cost, and achieve the effect of low cost and high cost performance
Active Publication Date: 2022-03-22
NANCHANG UNIV
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Problems solved by technology
[0003] In order to overcome the high cost problem of the above-mentioned existing materials, the present invention provides a preparation method of AlFeNiMoNb modified 904L alloy applied to oxygen-containing high-temperature chlorine corrosion environment
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[0030] figure 1 It is a flow chart of the technical route of the present invention.
[0031] First, the preparation of the AlFeNiMoNb hot-pressed sheet: the atomic ratio in the AlFeNiMoNb sheet is Al:Fe:Ni:Mo:Nb=1:1:1:1:1, and the high-purity Al, Fe, Ni, Mo, Nb raw material components are atomically After the ratio is converted into a weight ratio, the materials are mixed for 5 hours by ball milling, and the mixed powder is taken out and smelted and sintered in the environment of 700°C for 1h, 850°C for 1h, 1150°C for 1.5h, and 1350°C for 1.5h, and ball milled into a 300-mesh powder; Molding is carried out in sequence at 650°C for 45 minutes, 850°C for 45 minutes, 1050°C for 1h (pressure 15T), 1250°C for 1.5h (pressure 45T), and 1300°C for 1h to reach the density.
[0032] Secondly, AlFeNiMoNb: 904L alloy was prepared by vacuum arc melting technology: the purchased commodity 904L (100×100×2.5mm) plate and AlFeNiMoNb plate were cut into small pieces of different sizes to ensur...
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The invention discloses a preparation method of AlFeNiMoNb modified 904L alloy applied to oxygen-containing high-temperature chlorine corrosion environment: high-purity (99.99%) Al, Fe, Ni, Mo, Nb metal powder and high-purity (99.99%) commercial Using 904L super austenitic alloy as the initial raw material, AlFeNiMoNb modified 904L alloy (AlFeNiMoNb: 904L) was prepared by hot pressing process combined with vacuum arc melting technology. Metallographic analysis shows that the obtained alloy obtains a completely different microstructure from the raw material, and is more uniform in structure, and the single austenite structure of 904L is transformed into a dendrite structure. At HCl content of 2660ppm, O 2 Content 12%, CO 2 In an atmosphere with 24% content and nitrogen balance, high-temperature chlorine corrosion experiments were carried out at 600°C, 700°C, and 800°C for 55 hours. Small, high temperature chlorine corrosion resistance is better than 904L alloy and AlFeNiMoNb alloy, and compared with AlFeNiMoNb alloy, AlFeNiMoNb: 904L has lower cost and has obvious advantages in cost performance.
Description
technical field [0001] The invention belongs to the field of component design and performance testing of high-temperature chlorine corrosion resistant alloys, especially the technical field of anti-corrosion coating design on the inner wall of garbage incinerators, and specifically relates to the preparation of an AlFeNiMoNb modified 904L alloy applied to an oxygen-containing high-temperature chlorine corrosion environment method. Background technique [0002] The development of materials often determines the development of a related field. With the progress of human society and the development of science and technology, people put forward more and more stringent service requirements for materials. For the high-temperature field, the high-temperature corrosion phenomenon of materials is an important reason restricting the rapid progress of its application field. High-temperature chlorine corrosion is a serious corrosion problem that almost all metals and alloys cannot avoi...
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IPC IPC(8): C22C30/00C21D1/26C21D1/74B22F3/14
CPCC22C33/06C22C38/06C22C38/08C22C38/12C22C30/00C21D1/26C21D1/74C21D6/001B22F3/14
Inventor 彭文屹白凌云门丹丹邓晓华熊剑刘宗佩杨永超于思琪孙祖祥余钦洋余飞翔高安澜
Owner NANCHANG UNIV