CN-117431460-B - Austenite light wear-resistant steel and preparation method and application thereof

CN117431460BCN 117431460 BCN117431460 BCN 117431460BCN-117431460-B

Abstract

The invention provides an austenite light wear-resistant steel, a preparation method and application thereof, and belongs to the technical field of light wear-resistant steel. The invention provides austenitic light wear-resistant steel which comprises ：Mn 24～27％、Al 6.50～8.10％、C 0.85～1.12％、Si 0.10～0.30％、Cr 0.70～1.40％、Mo 0.40～0.80％、Ni 0.40～0.65％、Ce 0.04～0.07％、P≤0.03％、S≤0.01％ and the balance of Fe in percentage by mass. The example results show that the austenitic light wear-resistant steel provided by the invention has the density of less than 6.99g/cm 3 , the yield strength of more than or equal to 588MPa, the tensile strength of more than or equal to 910MPa, the elongation of more than or equal to 52.6 percent, the impact energy of-40 degrees CKV 2 of more than or equal to 95J, and the high impact energy wear resistance of more than 30 percent.

Inventors

WANG QINGFENG
LIU RIPING
ZHANG XINYU
MAO YIXUAN
LIANG LIWEN
CHENG BEN
ZHANG CHUNXIANG
WANG SUOTAO
LI YINGMEI

Assignees

燕山大学

Dates

Publication Date: 20260512
Application Date: 20231024

Claims (6)

1. An austenite light wear-resistant steel comprises ：Mn 24~27％、Al 6.50~8.10％、C 0.85~1.12％、Si 0.10~0.30％、Cr 0.70~1.40％、Mo 0.40~0.80％、Ni 0.40~0.65％、Ce 0.04~0.07％、P≤0.03％、S≤0.01％ mass percent of Fe and the balance of the steel; in the austenitic light wear-resistant steel, the mass content of each element is more than or equal to 0.64 and less than or equal to 0.1Mn+3C)/Al and less than or equal to 0.80; The preparation method of the austenitic light wear-resistant steel comprises the following steps: (a) Smelting and casting the alloy raw materials to obtain a casting blank; (b) Carrying out solid solution treatment on the casting blank obtained in the step (a) to obtain a solid solution state ingot blank; (c) Aging the solid solution ingot blank obtained in the step (b) to obtain austenitic light wear-resistant steel; the temperature of the solution treatment in the step (b) is 1090-1110 ℃, and the heat preservation time of the solution treatment is 1-2 hours; the heating mode of the solution treatment in the step (b) is sectional heating; The sectional heating comprises a first heating, a first heat preservation, a second heating, a second heat preservation and a third heating which are sequentially carried out; the temperature rising rate of the first temperature rising is 55-60 ℃ per hour; the temperature rising rate of the second temperature rising is 40-45 ℃ per hour; The temperature rising rate of the third temperature rising is 35-40 ℃ per hour; the temperature of the first heat preservation is 480-500 ℃, and the time of the first heat preservation is 0.5-1.5 h; The temperature of the second heat preservation is 650-670 ℃, and the time of the second heat preservation is 0.5-1.5 h.
2. The method for preparing the austenitic light wear-resistant steel of claim 1, comprising the following steps: (a) Smelting and casting the alloy raw materials to obtain a casting blank; (b) Carrying out solid solution treatment on the casting blank obtained in the step (a) to obtain a solid solution state ingot blank; (c) Aging the solid solution ingot blank obtained in the step (b) to obtain austenitic light wear-resistant steel; the temperature of the solution treatment in the step (b) is 1090-1110 ℃, and the heat preservation time of the solution treatment is 1-2 hours; the heating mode of the solution treatment in the step (b) is sectional heating; The sectional heating comprises a first heating, a first heat preservation, a second heating, a second heat preservation and a third heating which are sequentially carried out; the temperature rising rate of the first temperature rising is 55-60 ℃ per hour; the temperature rising rate of the second temperature rising is 40-45 ℃ per hour; The temperature rising rate of the third temperature rising is 35-40 ℃ per hour; the temperature of the first heat preservation is 480-500 ℃, and the time of the first heat preservation is 0.5-1.5 h; The temperature of the second heat preservation is 650-670 ℃, and the time of the second heat preservation is 0.5-1.5 h.
3. The method according to claim 2, wherein the casting temperature in the step (a) is 1400-1430 ℃ and the casting time is less than or equal to 10min.
4. The method according to claim 2, wherein the cooling means for the solution treatment in the step (b) is water cooling.
5. The method according to claim 2, wherein the temperature of the aging treatment in the step (C) is 480-520 ℃, the time of the aging treatment is 4-6 hours, and the rate of heating up to the aging treatment temperature is 40-45 ℃ per hour.
6. The application of the austenitic light wear-resistant steel prepared by the preparation method of claim 1 or any one of claims 2-5 in track shoes of excavators.

Description

Austenite light wear-resistant steel and preparation method and application thereof Technical Field The invention relates to the technical field of light wear-resistant steel, in particular to austenitic light wear-resistant steel and a preparation method and application thereof. Background With the development of industries such as metallurgy, mines and the like, the traditional high manganese steel (ZGMn 13) product has larger dead weight, insufficient wear resistance and higher cost, and is difficult to meet the requirements of low energy consumption and light weight development of industrial and mining enterprises at present. With the continuous research on the performance improvement of the traditional high manganese steel, the research on the high manganese steel added with Al element is increased, the density of the steel is reduced by adding light element Al into the steel, and then Mn, C and other austenite stabilizing elements are added, so that Fe-Mn-Al-C austenite light steel can be obtained, the yield strength of the material at low temperature can be improved, the material has better impact toughness, the density of the material is reduced with the increase of the content of Al, and the produced work hardening of the Fe-Mn-Al-C austenite light steel has better wear resistance under low impact work. However, the application examples of Fe-Mn-Al-C austenitic light steel in the wear-resistant field are still few, the existing light wear-resistant steel is mostly high manganese steel applied to a lining plate of a ball mill or a hammer head of a crusher, the hardness, strength and wear resistance of the light steel are improved through complex processes such as explosion hardening and shot blasting, meanwhile, the manufacturing cost is increased through the complex production process, and the problems of insufficient addition of light elements and overhigh density are also caused. Therefore, providing an austenitic light weight wear resistant steel with low density, high strength, high toughness, high wear resistance and low cost is a technical problem to be solved in the art. Disclosure of Invention The invention aims to provide an austenite light wear-resistant steel, and a preparation method and application thereof. The austenitic light wear-resistant steel provided by the invention has the advantages of low density, high strength, high toughness, high wear resistance and low cost. In order to achieve the above object, the present invention provides the following technical solutions: The invention provides an austenite light wear-resistant steel, which comprises ：Mn24～27％、Al 6.50～8.10％、C 0.85～1.12％、Si 0.10～0.30％、Cr 0.70～1.40％、Mo 0.40～0.80％、Ni 0.40～0.65％、Ce 0.04～0.07％、P≤0.03％、S≤0.01％ and the balance of Fe in percentage by mass. Preferably, in the austenitic light wear-resistant steel, 0.64 is less than or equal to (0.1Mn+3C)/Al is less than or equal to 0.89 based on the mass content of each element. The invention provides a preparation method of the austenitic light wear-resistant steel, which comprises the following steps: (a) Smelting and casting the alloy raw materials to obtain a casting blank; (b) Carrying out solid solution treatment on the casting blank obtained in the step (a) to obtain a solid solution state ingot blank; (c) And (3) aging the solid solution ingot blank obtained in the step (b) to obtain the austenitic light wear-resistant steel. Preferably, the casting temperature in the step (a) is 1400-1430 ℃ and the casting time is less than or equal to 10min. Preferably, the temperature of the solution treatment in the step (b) is 1090-1110 ℃, and the heat preservation time of the solution treatment is 1-2 hours. Preferably, the heating mode of the solution treatment in the step (b) is a sectional heating mode; The sectional heating comprises a first heating, a first heat preservation, a second heating, a second heat preservation and a third heating which are sequentially carried out; the temperature rising rate of the first temperature rising is 55-60 ℃ per hour; the temperature rising rate of the second temperature rising is 40-45 ℃ per hour; And the temperature rising rate of the third temperature rising is 35-40 ℃ per hour. Preferably, the temperature of the first heat preservation is 480-500 ℃, and the time of the first heat preservation is 0.5-1.5 h; The temperature of the second heat preservation is 650-670 ℃, and the time of the second heat preservation is 0.5-1.5 h. Preferably, the cooling means of the solution treatment in step (b) is water cooling. Preferably, the temperature of the aging treatment in the step (C) is 480-520 ℃, the time of the aging treatment is 4-6 ℃ Ch, and the temperature rising rate from the temperature of the aging treatment to the temperature of the aging treatment is 40-45 ℃ per hour. The invention provides the application of the austenitic light wear-resistant steel prepared by the technical scheme or the preparation method of the austenitic light