A preparation method of Ti-modified 904l alloy applied in high-temperature oxidizing chlorine-containing atmosphere
A high-temperature oxidation and modification technology is applied in the field of preparation of Ti-modified 904L alloy, which can solve the problems of high cost and achieve the effect of low cost and high temperature resistance to chlorine corrosion.
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 commonly used materials, the present invention provides a preparation method of Ti-modified 904L alloy applied in high-temperature oxidative chlorine-containing atmosphere
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[0023] A preparation method of Ti-modified 904L alloy applied to high-temperature oxidizing chlorine-containing atmosphere:
[0024] figure 1 It is a flow chart of the technical route of the present invention.
[0025] First of all, the 904L stainless steel plate is cut into small pieces of different sizes to ensure that the weighing quality is controllable during the subsequent melting of the alloy. A specified amount of Ti particles (10at.%) (see Table 1) was weighed, ultrasonically cleaned together with the 904L block, dried and weighed.
[0026] Table 1: Alloy Actual Composition (EDS)
[0027]
[0028] Secondly, carry out argon protection arc melting, melting environment: argon gas 1 atmosphere, current 200A, obtain alloy button ingots, carry out vacuum annealing treatment on the alloy at 900℃ for 24 hours, wire cut into 2.5×5×10mm samples, grind and polish .
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The invention discloses a preparation method of a Ti-modified 904L alloy applied in a high-temperature oxidizing chlorine-containing atmosphere: using high-purity Ti (99.99%) metal particles and 904L super austenitic stainless steel plates as initial raw materials, and adopting a vacuum electric arc furnace Argon-protected smelting technology was used to prepare Ti-modified 904L alloy (904L: Ti), and to investigate its oxidative chlorine-containing atmosphere in a simulated waste incinerator (N 2 ‑0.28HCl‑2CO 2 -1O 2 ), 600°C, 700°C and 800°C, aiming to improve the high temperature chlorine corrosion resistance of 904L super austenitic alloy, which is expected to be applied to high temperature oxidizing chlorine-containing atmosphere conditions, such as garbage Material selection for tube row coating of incinerator heat exchanger.
Description
technical field [0001] The invention belongs to the field of high temperature chlorine corrosion resistant alloy design and performance testing, especially the technical field of anticorrosion coating design on the inner wall of a garbage incinerator, and specifically relates to a preparation method of a Ti-modified 904L alloy used in a high temperature chlorine-containing atmosphere. Background technique [0002] The degree of damage caused by high-temperature chlorine corrosion of metals is usually much higher than that caused by high-temperature oxidation. The gas / corrosion layer interface will be further oxidized with the increase of oxygen pressure. However, the oxide layer formed by this process is mostly loose and porous, without protection, resulting in continuous corrosion of the base material. The high-temperature chlorine corrosion process occurs in many industrial conditions, bringing huge safety hazards and economic losses to actual production, such as waste inc...
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IPC IPC(8): C22C33/06C22C38/14C21D1/26C21D1/773C21D6/00
CPCC22C33/06C22C33/006C22C38/14C21D6/00C21D1/26C21D1/773
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