A kind of cr, n-type high manganese austenitic steel plate and preparation method thereof

A technology of austenitic and steel plates, applied in the field of high manganese austenitic steel plates and its preparation, high manganese austenitic steel plates, can solve the problems of poor corrosion resistance and achieve the effect of reducing costs

Active Publication Date: 2017-05-31
XUZHOU SHENGHAI MACHINERY MFG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, studies have found that although this type of austenitic Fe-Mn-Al-C alloy has strong oxidation resistance, the problem it faces is poor corrosion resistance

Method used

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  • A kind of cr, n-type high manganese austenitic steel plate and preparation method thereof
  • A kind of cr, n-type high manganese austenitic steel plate and preparation method thereof
  • A kind of cr, n-type high manganese austenitic steel plate and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A Cr and N-type high manganese austenitic steel plate, the chemical composition of the steel plate is: C 0.28%; Mn 24.8%; Cr 2.8%; Al 2.8%; N 0.02%; P 0.015%; S 0.005 %; the balance is Fe.

[0039] A preparation method for Cr, N-type high manganese austenitic steel plate, comprising the following steps:

[0040] Step 1. Smelt molten steel according to the set chemical composition and cast it into ingots. The set chemical composition is: C 0.28%; Mn 24.8%; Cr 2.8%; Al 2.8%; N 0.02%; P 0.015% ; S 0.005%; the balance is Fe;

[0041] Step 2: Heating the ingot to 1150°C, holding it for 1.8 hours, and forging it into a slab; heating it to 1150°C, holding it for 0.8 hours, and rolling it for 4 passes, with the starting rolling temperature at 1100°C and the final rolling temperature above 1000°C; The reduction rate of the pass is 25%, the reduction rate of the second pass is 38%, the reduction rate of the third pass is 37%, and the reduction rate of the fourth pass is 39.5%; ...

Embodiment 2

[0045] A Cr and N-type high manganese austenitic steel plate, the chemical composition of the steel plate is: C 0.32%; Mn 25.2%; Cr 3.2%; Al 3.2%; N 0.20%; P 0.015%; S 0.005 %; the balance is Fe; its organization is austenite.

[0046] A preparation method for Cr, N-type high manganese austenitic steel plate, comprising the following steps:

[0047] Step 1, smelting molten steel according to the set chemical composition and casting it into ingots, the set chemical composition is: C 0.32%; Mn 25.2%; Cr 3.2%; Al 3.2%; N 0.20%; P 0.015% ; S 0.005%; the balance is Fe; its structure is austenite;

[0048] Step 2: Heat the ingot to 1250°C, hold it for 2.2 hours, and forge it into a slab; heat it to 1200°C, hold it for 1.2 hours, and perform 4 passes of rolling. The reduction rate of the pass is 27%, the reduction rate of the second pass is 39%, the reduction rate of the third pass is 38%, and the reduction rate of the fourth pass is 0.5%;

[0049] Step 3, heat the hot-rolled shee...

Embodiment 3

[0052] A Cr, N-type high manganese austenitic steel plate, the chemical composition of the steel plate is: C 0.3%; Mn25%; Cr 3%; Al 3%; N 0.11%; P 0.007%; S 0.002%, Its structure is austenite.

[0053] A preparation method for Cr, N-type high manganese austenitic steel plate, comprising the following steps:

[0054] Step 1. Smelt molten steel according to the set chemical composition and cast it into ingots. The set chemical composition is: C 0.3%; Mn 25%; Cr 3%; Al 3%; N 0.11%; P 0.007% ; S 0.002%, its organization is austenite.

[0055] Step 2: Heat the ingot to 1200°C, hold it for 2 hours, and forge it into a slab; heat it to 1175°C, hold it for 1 hour, and perform 4 passes of rolling. The reduction rate is 25.7%, the reduction rate of the second pass is 38.5%, the reduction rate of the third pass is 37.5%, and the reduction rate of the fourth pass is 40%. At this time, the total reduction is 83%, and the thickness of the hot-rolled sheet is 6mm.

[0056] Step 3, heat-r...

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Abstract

The invention discloses a Cr / N-containing high-manganese austenitic steel plate and a preparation method thereof. The Cr / N-containing high-manganese austenitic steel plate comprises the following chemical components in percentage by weight: 0.28-0.32% of C, 24.8-25.2% of Mn, 2.8-3.2% of Cr, 2.8-3.2% of Al, 0.02-0.20% of N, at most 0.015% of P, at most 0.005% of S and the balance of Fe. The preparation method comprises the following steps: smelting molten steel according to set components, casting into an ingot, heating to 1200 DEG C, keeping the temperature for 2 hours, forging into a plate blank, carrying out hot rolling until the thickness is 6mm, carrying out homogenizing treatment, carrying out cold rolling to the thickness of 1mm or so, and finally, carrying out solution treatment, thereby obtaining favorable strength-plasticity compatibility and having certain oxidation resistance and corrosion resistance.

Description

technical field [0001] The invention belongs to the field of metallurgical materials, and in particular relates to a high manganese austenitic steel plate, specifically, a high manganese austenitic steel plate containing Cr and N elements, low cost and with certain corrosion resistance and a preparation method thereof. Background technique [0002] Stainless steel is an indispensable traditional metal material with great consumption, 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 strategic metal elements that are resource-scarce and expensive; especially, my country is one of the countries that are poor in nickel and chromium, and the reserves of nickel and chromium are very small, and the raw materials mainly ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/38C21D8/02
Inventor 陈礼清李长生袁晓云
Owner XUZHOU SHENGHAI MACHINERY MFG TECH
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