Method for discriminating austenitic stainless steel and high manganese steel
A technology of austenitic stainless steel and high manganese steel, which is applied in the direction of material analysis by observing the influence of chemical indicators, and analysis by chemical reaction of materials, etc., can solve the problem that austenitic stainless steel and high manganese cannot be quickly identified. Steel and other problems, to achieve the effect of strong practicability, easy portability and low cost
Active Publication Date: 2012-02-22
SHANXI TAIGANG STAINLESS STEEL CO LTD
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Problems solved by technology
The existing method of identifying austenitic stainless steel and high manganese steel is to use large-scale instrument detection, which cannot quickly identify austenitic stainless steel and high manganese steel on the spot
Method used
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Experimental program
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Effect test
Embodiment
[0020] In this embodiment, six pieces of steel are taken, including high-manganese steel, chromium-manganese-nitrogen austenitic stainless steel and chromium-nickel austenitic stainless steel, and no other steel. In order to identify each piece of steel, this embodiment takes the following sequential steps :
[0021] I preparation of identification reagents
[0022] Mix 1 part by volume of nitric acid (density 1.42g / mL) with 3 parts by volume hydrochloric acid (density 1.19g / mL) to make a 20mL mixed solution, add 1.5g metal copper to the mixed solution, and heat to 50 After dissolving copper at ℃, cool to 20℃ and dilute to 30mL with distilled water. The solution is blue-green in color and corrosive.
[0023] II identification of steel
[0024] Sand the six pieces of steel that need to be identified with sandpaper to remove the surface coating or oxide layer, and the area only needs to be 2-3mm 2 That is, add one drop of the prepared identification reagent to the surface wh...
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The invention relates to a method for discriminating an austenitic stainless steel and a high manganese steel. The method comprises the following steps of: (I) preparation of a discriminating reagent: mixing 1 volume part of nitric acid with a density of 1.42g / mL and 3 volume parts of hydrochloric acid with a density of 1.19g / mL to obtain 20mL of a mixed solution; adding 1.5+ / -0.2g of metal copper into the solution, heating to dissolve the copper, cooling to a room temperature and adding distilled water to dilute to 30mL; (II) steel discrimination: polishing off a surface layer coating or oxide on a steel to be discriminated using sand paper, adding one drop of the discriminating reagent on the surface with the surface layer coating or oxide removed, and observing the steel surface coatedwith the discriminating reagent; if royal purple color of copper occurs immediately, the steel is high manganese steel; if light red color of cooper occurs, the steel is chromium-manganese-nitrogen austenitic stainless steel; if no color of cooper occurs, the steel is chromium-nickel austenitic stainless steel. The discriminating method of the present invention can rapidly discriminate austeniticstainless steel and high manganese steel on spot.
Description
technical field [0001] The invention relates to a method for identifying austenitic stainless steel and high manganese steel. Background technique [0002] There are many grades and types of stainless steel products in the steel industry. Only my country has more than 100 types of stainless steel (steel grades), and the element composition and content of different steel grades are different, and their performance and price are also very different. In the multi-variety stainless steel smelting process, a large number of different types of scrap steel raw materials are needed, and the problem of mixed numbers is very easy to occur in the circulation of materials in each subsequent process and the storage of semi-finished and finished billets, so it will inevitably produce a large number of screening and identification work. [0003] Stainless steel can be roughly divided into four types: austenitic stainless steel, ferritic stainless steel, duplex stainless steel and martensi...
Claims
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IPC IPC(8): G01N21/78
Inventor 任维萍秦丽雁张存贵王惠萍
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD