Metallographic sample preparation method for hot-dip galvanized plate section iron-aluminum alloy phase observation
A technology of iron-aluminum alloy and hot-dip galvanizing, which is applied in the preparation of test samples, sampling, instruments, etc., can solve the problems of labor consumption, time consumption, and cannot meet the rapid development of production, so as to reduce production costs and reduce procedures , The effect of saving test costs
Active Publication Date: 2019-12-13
TANGSHAN IRON & STEEL GROUP +1
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Problems solved by technology
After actual operation, it takes about 8 hours to grind off a 2mm sample by this method, which is very time-consuming and labor-intensive for metallographic sample preparation personnel, and cannot meet the needs of rapid production development, and needs to be improved urgently
Method used
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[0027] Prominent features of the present invention are shown in the following aspects:
[0028] (1) The sample to be tested is prepared by wire cutting. If a shearing machine is used to generate a shear strain band on the shear section of the sample, it is necessary to carefully grind off the 2mm section of the sample, and it is also necessary to avoid heating of the sample section during the grinding process, which is very time-consuming and greatly affects work efficiency Poor; if laser cutting or other high-temperature cutting is used, the iron-aluminum alloy phase of the coated cross-section of the sample will change.
[0029] (2) Grind the inlaid samples directly on 600-mesh, 800-mesh, 2000-mesh, 5000-mesh, and 10000-mesh sandpaper in sequence. The choice of the highest mesh sandpaper, because the hot-dip galvanized iron-aluminum alloy phase is only about 1 micron, which is very thin when viewed from the cross section, so the choice of the highest sandpaper mesh is also ...
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Abstract
The invention discloses a metallographic sample preparation method for hot-dip galvanized plate section iron-aluminum alloy phase observation, belongs to the technical field of a galvanized plate metallographic sample preparation method and is used for galvanized plate section observation metallographic sample preparation. The technical scheme comprises the steps of carrying out line cutting on ato-be-tested sample for sample preparation, and washing grease on the surface of the sample through utilization of normal temperature deionized water; inlaying the linearly cut sample through adoptionof an inlaying machine; and directly grinding the inlayed sample on 600-mesh, 800-mesh, 2000-mesh, 5000-mesh and 10000-mesh abrasive paper in sequence; placing the metallographic sample grinded by the 10000-mesh abrasive paper on velveteen polishing cloth for grinding, wherein the grinding is carried out through adoption of uniform force, and zinc is prevented from being grinded off. According tothe method, a great deal of sample preparation time can be reduced, sample preparation efficiency of the sample is greatly improved, iron-aluminum alloy phase scratches of the sample are very few, and a zinc and substrate junction is relatively clear. The method has important significance in researching an iron-aluminum alloy phase by galvanization and corrosion technical personnel.
Description
technical field [0001] The invention relates to a metallographic sample preparation method for industrial production of hot-dip galvanized sheet cross-section iron-aluminum alloy phase observation, and belongs to the technical field of metallographic sample preparation methods for galvanized sheets. Background technique [0002] Without damaging the surface of the galvanized sheet, the corrosion resistance of the galvanized sheet first depends on the antirust oil and passivation film on the surface of the galvanized sheet. When these two protective layers lose their protective ability, the zinc layer and the zinc-iron alloy phase It is particularly important to resist external corrosion. In addition, some automobile and home appliance manufacturers require the steel plate not to be oiled during the certification of the automobile plate, so that the zinc layer on the surface of the sample is scratched and then the corrosion test is carried out. The alloyed hot-dip galvanized...
Claims
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Login to View More IPC IPC(8): G01N1/28G01N1/32G01N1/34
CPCG01N1/286G01N1/32G01N1/34
Inventor 孟凡月魏焕君李桂兰田东宽齐建群杜雁冰夏明生张静刘春波
Owner TANGSHAN IRON & STEEL GROUP