Powder sintered porous filter alloy, its preparation method and its preformed body
A pre-compression forming and alloying technology, applied in filtration separation, separation methods, chemical instruments and methods, etc., can solve the problems of excessive material tortuosity factor, difficult to control material pore size, affecting permeability, etc., to achieve good corrosion resistance, The effect of superior corrosion resistance and excellent corrosion resistance
Active Publication Date: 2017-02-08
CHENGDU INTERMENT TECH
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Problems solved by technology
However, in the development process of new materials, in addition to the research on material composition, many problems in the process of sintering porosity are often faced, such as: sintering densification, material tortuosity after sintering is too large to affect permeability, material pore size hard to control etc.
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[0033] The preparation methods of the above-mentioned powder sintered Ni-based porous filter alloys of the present invention and the powder sintered Ni-based porous filter alloys obtained by these methods are specifically described below through four sets of experimental examples. Through these descriptions, those skilled in the art can clearly understand the outstanding features of the powder sintered Ni-based porous filter alloy of the present invention. The numbers of the experimental examples mentioned below are the same as the numbers corresponding to the "sample".
[0034]
[0035] See Table 1 for the raw material components and contents (in mass percent) of Experimental Examples 1 to 12 of the first group of experimental examples. Among them, the material use A refers to the prepared powder sintered porous filter alloy for liquid filtration; the material use B refers to the prepared powder sintered porous filter alloy used for gas filtration. In the experimental exam...
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Abstract
The invention discloses a powder sintered porous filter alloy, a preparation method of the alloy and a pre-compression molded body for preparing the alloy. The alloy is basically prepared from the ingredients in percentage by mass: 26-30% of Mo, 0-2% of Fe, 0-0.1% of Cr, 0-0.2% of C, 0-0.1% of Si, 0-1% of Mn, 0-5% of Al, 0-1.5% of Ti and the balance of Ni; when the alloy is used for filtering liquid, the average pore size is not greater than 20 microns, and the relative coefficient of permeability is not smaller than 0.2m<3> / m<2>.kpa.h; when the alloy is used for filtering gas, the average pore size is not greater than 60 microns, and the relative coefficient of gas permeability is not smaller than 80m<3> / m<2>.kpa.h. Aiming at a fully-reducing system, the corrosion resistance of the alloy is very superior; secondly, the alloy can resist the corrosion of hydrochloric acid of any temperature and any concentration at normal pressure; in addition, the alloy has excellent corrosion resistance to uninflated medium-concentration non-oxidizing sulfuric acid, phosphoric acid of various concentrations, high-temperature acetic acid, organic acids, such as formic acid and the like, bromic acid and hydrogen chloride gas.
Description
technical field [0001] The invention relates to a sintered porous filter material, in particular to a powder sintered porous filter alloy, a preparation method of the alloy and a pre-pressed molded body for preparing the alloy. Background technique [0002] The applicant's current research on powder sintered porous filter materials focuses on the expansion of material application fields, improvement of material performance, exploration of pore-forming mechanism and optimization of preparation process. In the expansion of the application field of sintered porous filter materials, it is boldly proposed to develop corresponding ones that can meet the requirements of chemical stability (such as corrosion resistance) in this application environment and have good filtration performance for some specific and relatively harsh application environments. new material. Its significance is that if this type of new material is successfully developed, it will be able to bring precision fi...
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IPC IPC(8): C22C19/03C22C19/05C22C1/08B01D39/20
Inventor 高麟汪涛焦鹏鹤李波王韬吴磊
Owner CHENGDU INTERMENT TECH