A kind of corrosion-resistant high manganese austenitic steel plate and preparation method thereof

An austenitic steel and austenitic technology, which is applied in the field of preparation of high manganese austenitic steel plates, can solve the problems of poor corrosion resistance of high manganese austenitic steel, achieve improved corrosion resistance, reduce costs, and save costs Effect

Active Publication Date: 2022-07-01
XI'AN POLYTECHNIC UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for improving the corrosion resistance of high manganese austenitic steel based on grain boundary engineering, which solves the problem of poor corrosion resistance of high manganese austenitic steel existing in the prior art

Method used

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  • A kind of corrosion-resistant high manganese austenitic steel plate and preparation method thereof
  • A kind of corrosion-resistant high manganese austenitic steel plate and preparation method thereof
  • A kind of corrosion-resistant high manganese austenitic steel plate and preparation method thereof

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Embodiment 1-4

[0036] The present invention provides a set of experimental results as examples. The composition of the steel is the same, the steelmaking, continuous casting, forging billet heating and rolling processes are the same, and the solution treatment process after cold rolling is the same. In terms of the control system of deformation, some deformation, performance test results and secondary electron image structure are given as comparative examples.

[0037] A preparation method of a corrosion-resistant high-manganese austenitic steel plate is specifically implemented according to the following steps:

[0038] Step 1, heating the ingot to 1200°C, holding the temperature for 2h, then cooling naturally, and forging into a slab;

[0039] In step 2, the slab is heated to 1200°C, held for 1 hour for preheating, and then rolled for 4 passes, with an opening temperature of 1050°C and a final rolling temperature of over 1000°C; the first pass reduction rate is 25.7%, the second pass The ...

Embodiment 5

[0048] A preparation method of a corrosion-resistant high-manganese austenitic steel sheet of the present invention is specifically implemented according to the following steps:

[0049] Step 1, heating the ingot to 1250°C, keeping the temperature for 2.5h, and then naturally cooling, and forging into a slab;

[0050] In step 2, the slab is heated to 1200°C, held for 1.5h for preheating, and then rolled for 4 passes, the starting rolling temperature is 1100°C, the final rolling temperature is above 1000°C, and the first pass reduction rate is 25.7%. The reduction rate of the 2nd pass is 38.5%, the reduction rate of the 3rd pass is 37.5%, and the reduction rate of the 4th pass is 40% to obtain a hot-rolled sheet; after 4 passes of rolling, the thickness of the hot-rolled sheet is 6±0.3mm;

[0051] In step 3, the hot-rolled sheet obtained in step 2 is kept at 1100° C. for 1.5 hours for homogenization treatment, and then cold-rolled and annealed to obtain a high-manganese steel s...

Embodiment 6

[0054] A preparation method of a corrosion-resistant high-manganese austenitic steel plate of the present invention, the prepared high-manganese austenitic steel is as above, and is specifically implemented according to the following steps:

[0055] Step 1, heating the ingot to 1150°C, then holding the temperature for 1.5h, then cooling naturally, and forging into a slab;

[0056] In step 2, the slab is heated to 1150°C, kept for 0.5h for preheating, and then rolled for 4 passes, the starting rolling temperature is 1050°C, the final rolling temperature is above 1000°C, and the first pass reduction rate is 25.7%. The reduction rate of the 2nd pass is 38.5%, the reduction rate of the 3rd pass is 37.5%, and the reduction rate of the 4th pass is 40% to obtain a hot-rolled sheet; after 4 passes of rolling, the thickness of the hot-rolled sheet is 6±0.3mm;

[0057] In step 3, the hot-rolled sheet obtained in step 2 is kept at 1000° C. for 0.5 h for homogenization treatment, and then...

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Abstract

The invention discloses a corrosion-resistant high-manganese austenitic steel plate. The high-manganese austenitic steel has an austenite structure, the non-proportional elongation strength of the high-manganese austenitic steel is Rp0.2≥424MPa, and the tensile strength is Rm ≥613MPa, elongation after fracture A≥48%, 8h salt spray corrosion weight gain ≤0.011mg / mm 2 . The purpose of the present invention is to provide a method for improving the corrosion resistance of high manganese austenitic steel based on grain boundary engineering, which solves the problem of poor corrosion resistance of high manganese austenitic steel in the prior art. The invention discloses a preparation method of a corrosion-resistant high manganese austenitic steel plate, which specifically includes: step 1, forging an ingot into a slab; step 2, preheating the slab, and then performing 4 passes of rolling In step 3, the hot-rolled plate obtained in step 2 is subjected to homogenization treatment, and then cold-rolled and annealed to obtain a high-manganese steel plate; in step 4, the annealed high-manganese steel plate is deformed to obtain a final sheet.

Description

technical field [0001] The invention belongs to the technical field of metallurgical material preparation methods, and relates to a corrosion-resistant high-manganese austenitic steel plate. The invention also discloses a preparation method of the corrosion-resistant high-manganese austenitic steel plate. Background technique [0002] Stainless steel is an indispensable traditional metal material with huge consumption today, and is widely used in various fields of national economic construction and people's life. In order to obtain good corrosion resistance and oxidation resistance, Ni and Cr are often used as alloying elements in stainless steel, and their content is very high. However, as far as the world is concerned, Ni and Cr are both resource-deficient and expensive strategic metal elements; in particular, my country is one of the poor nickel-chromium countries, the reserves of nickel-chromium are very small, and the raw materials are mainly imported. The current situa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D8/02C21D1/26C21D9/00C21D6/00C22C38/04
CPCC21D8/0205C21D8/0226C21D8/0236C21D8/0247C21D1/26C21D9/0081C21D6/005C22C38/04C21D2211/001
Inventor 袁晓云艾根根苏晓磊巫云龙宋衍滟
Owner XI'AN POLYTECHNIC UNIVERSITY
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