Novel high-manganese wear-resistant steel ZGMn14Cr4NiCuB and preparation method thereof

Abstract

The invention relates to novel high-manganese wear-resistant steel ZGMn14Cr4NiCuB and a preparation method thereof. The novel high-manganese wear-resistant steel ZGMn14Cr4NiCuB comprises the following alloy elements in percentage by mass: 1.05% of C, 0.6% of Si, 13.75% of Mn, 0.025% of P, 0.02% of S, 3.25% of Cr, 0.6% of Ni, 0.125% of Cu, 0.013% of B, 0.025% of Re and the balance of Fe and impurities. The invention further provides a preparation method of the novel high-manganese wear-resistant steel ZGMn14Cr4NiCuB, and the preparation method comprises the following steps that 1, the elements of the high-manganese wear-resistant steel ZGMn14Cr4NiCuB are provided according to the mass percent; 2, the elements of the high-manganese wear-resistant steel ZGMn14Cr4NiCuB provided in the step 1 are smelted and subjected to heat treatment; and step 3, carrying out high-temperature quenching and low-temperature tempering procedures on the wet ball mill lining plate. The high-manganese alloy steel has the advantages that the wear resistance of the steel is remarkably improved by optimizing alloy components and a heat treatment process, actual use shows that compared with existing high-manganese alloy steel, the service life of equipment parts is effectively prolonged, the service life of a wet ball mill lining plate in the prior art is 5-7 months, and the wear resistance of the high-manganese alloy steel is greatly improved. The service life of the wet ball mill lining plate prepared from the material is as long as 10-16 months.

Description

Technical Field

[0001] The invention relates to the field of metal wear-resistant materials, and in particular to a high manganese steel material with high wear resistance, high corrosion resistance and high toughness and a preparation method thereof. Background Art

[0002] Among traditional metal wear-resistant materials, high manganese steel is famous for its excellent toughness and impact resistance. Since Hadfield invented high manganese steel with a manganese content of 13% in 1882, referred to as Mn13, high manganese steel has been widely used in wear-resistant parts in the fields of mining, metallurgy, railways, electricity, building materials and machinery because of its significant work hardening ability and excellent impact toughness. However, its performance in hardness is relatively insufficient, and it is difficult to meet the wear resistance requirements under certain specific working conditions. Chromium alloy steel is favored for its higher hardness, but it has obvious shortcomings in toughness and is prone to breakage when impacted. This difficult balance between wear resistance and toughness has become the main bottleneck restricting the application of steel materials in harsh working conditions such as mining machinery and construction engineering. In technical fields such as mining machinery and construction engineering, equipment parts need to withstand huge impact and wear, so extremely high requirements are placed on the wear resistance and toughness of the material. Especially in wet mining and acid, alkali and salt mining, there are extremely high requirements for wear-resistant parts. Traditional high manganese steel and chromium alloy steel are difficult to meet these demanding performance requirements at the same time due to their respective limitations, resulting in rapid wear and easy breakage of equipment parts, which not only increases maintenance costs, but may also cause long downtime, seriously affecting production efficiency.

[0003] Since high manganese steel is an austenite matrix, its yield strength is low and plastic deformation is easy to occur during use. In order to overcome the problem of low yield strength, alloys such as chromium Cr, molybdenum Mo, vanadium V, and titanium Ti are usually added to Mn13 steel to increase the yield strength. Generally, the content of chromium Cr is 1.5-2.5%, but the effect is not obvious. Molybdenum, vanadium, and titanium alloys are expensive, which increases the production cost and has a low cost-performance ratio, making it difficult for the market to accept them.

[0004] In the patent literature that has been published, for example, patent application number CN201410035558.3 ​​discloses a tungsten-chromium-vanadium high manganese wear-resistant steel and its preparation method, which belongs to the field of wear-resistant material technology. First, in an electric furnace, scrap steel, high manganese steel scrap, carburizer, ferromanganese, ferromanganese nitride, ferrotungsten, ferrochrome, ferrovanadium and metal aluminum are used as raw materials to smelt tungsten-chromium-vanadium high manganese wear-resistant steel molten steel. When the molten steel temperature reaches 1520-1550°C, it is taken out of the furnace and put into a ladle. Insert alloy wires containing microalloying elements such as rare earth, titanium, niobium, boron, potassium, and magnesium into the molten steel in the ladle, and the amount of alloy wire added accounts for 1.8-2.5% of the mass fraction of the molten steel in the ladle. The diameter of the alloy wire is 2000mm. Pour the treated molten steel into the mold, then clean the pouring head, and perform water toughening treatment on the casting to obtain tungsten-chromium-vanadium high manganese wear-resistant steel with excellent wear resistance.

[0005] For example, invention patent application No. CN202211680152.1 discloses a cast austenitic high manganese wear-resistant steel, whose alloy elements are calculated by mass percentage: C: 0.7-1.3%, Si: 0.3-0.7%, Mn: 7.0-20.0%, Al: 0.03-0.4%, Cr: 0.2-1.0%, Mo: 0.1-0.6%, Ni: 2.0-7.0%, V: 0.05-0.6%, N: 0.01-0.04%; P: ≤0.04%; S: ≤0.02%, and the remainder is iron and unavoidable impurities. The present invention reasonably proportions C, Mn, Ni and Cr elements and alloys them with Mo, V, Nb, N and Re, so that the steel can obtain reliable cast austenite. Because the alloyed material crystal package is densely distributed with fine nucleation carbides such as Mo, V, Nb, N and Re, the grains are refined, and the precipitation of grain boundary carbides can be significantly reduced, thereby improving the mechanical properties. In addition, due to the presence of grain refinement and fine carbide hard points, the stacking fault energy in the process of work hardening can be effectively reduced, thereby improving the work hardening ability and increasing the wear resistance of the product.

[0006] For another example, invention patent application number CN202211680152.1 specifically discloses a Cu-containing austenitic high manganese wear-resistant steel bucket tooth and a manufacturing method thereof, wherein the Cu-containing austenitic high manganese wear-resistant steel bucket tooth comprises, by mass percentage, C: 1.1-1.3%, Mn: 12.4-12.6%, Si: 0.4-0.6%, Cr: 1.7-1.9%, Mo: 0.2-0.4%, Ni: 0.4-0.5%, Al: 0.06-0.08%. .08%, Cu: 0.3-0.5%, S≤0.01%, P≤0.02%, and the rest are Fe and inevitable impurity elements; the present invention performs micro-alloying treatment on traditional high manganese steel, adds elements such as Cu, Al, Ni, and matches improved casting process and heat treatment process, and has excellent hardness, impact toughness and wear resistance. The structure of the prepared Cu-containing austenitic high manganese wear-resistant steel bucket tooth includes austenite and precipitates, has a long service life, and has significantly improved wear resistance than traditional wear-resistant high manganese steel.

[0007] The high manganese wear-resistant steel involved in the above prior art including the invention patent application and its composition and the steel material prepared by the preparation method cannot meet the requirements of wear resistance, corrosion resistance and resistance to extremely high impact loads required in special use environments. Summary of the invention

[0008] In view of the deficiencies in the prior art, the present invention provides a novel high manganese wear-resistant steel ZGMn14Cr4NiCuB and a preparation method thereof, and achieves higher wear resistance and corrosion resistance by optimizing the alloy component ratio and heat treatment process.

[0009] The new high manganese steel ZGMn14Cr4NiCuB comprises: C, Si, Mn, P, S, Cr, Ni, Cu, B, Re, and Fe. Among the above alloy elements: manganese improves the toughness and wear resistance of the steel; chromium enhances the hardness and corrosion resistance of the steel; nickel and copper improve the stiffness, strength, wear resistance, corrosion resistance, and heat resistance of manganese steel; boron improves the density and hardness of the steel and strengthens the crystal interface; by adjusting the mass ratio of carbon, silicon, manganese, chromium, nickel, copper, boron and other elements, wear-resistant compounds can be obtained to improve yield strength and toughness; nickel, copper and boron are added on the basis of chromium in high manganese, among which nickel is a strong austenite stabilizing element, and increasing the content of nickel is beneficial to stabilizing the tensile strength and impact value of the wear-resistant steel. Specifically, nickel can increase the elastic modulus of high manganese steel, making its mechanical properties more uniform and reducing deformation caused by stress. The addition of copper improves the fluidity of molten steel, reduces defects during the pouring process, plays a role in refining grains, and improves the mechanical properties of high manganese steel. At the same time, copper can promote the precipitation of alloy cementite, thereby playing a role in precipitation strengthening. The presence of precipitates further improves the wear resistance of steel. In addition, copper can interact with manganese and carbon to form copper-containing compounds, increasing the strength and hardness of high manganese steel. Copper can also inhibit the oxidation reaction in high manganese steel and prevent high manganese steel from being affected by oxidative corrosion, thereby improving the corrosion resistance of high manganese steel. Boron is an element with active chemical properties. Boron and carbon form boron carbide compounds, boron and manganese form boron manganese compounds, boron and chromium form boron chromium compounds, boron and silicon form silicon-boron compounds, and boron and iron form boron iron compounds, further improving the wear resistance and corrosion resistance of steel.

[0010] Furthermore, rare earth elements are added to the novel high manganese steel ZGMn14Cr4NiCuB, with the mass percentage of the added rare earth elements not exceeding 0.002%. The austenitizing temperature and the cooling water temperature are adjusted according to the alloy composition to improve the quality of the molten steel and the as-cast structure.

[0011] Furthermore, the new high manganese steel ZGMn14Cr4NiCuB includes, by percentage, C: 0.9-1.2%, Si: 0.4-0.8%, Mn: 13-14.5%, P≤0.05%, S≤0.04%, Cr: 2.5-4.0%, Ni: 0.2-1.0%, Cu: 0.1-0.15%, B: 0.005-0.02%, Re: 0.02-0.03%, and the balance is Fe and impurities.

[0012] Furthermore, the new high manganese steel ZGMn14Cr4NiCuB has the following mass percentages: C: 1.05%, Si: 0.6%, Mn: 13.75%, P: 0.025%, S: 0.02%, Cr: 3.25%, Ni: 0.6%, Cu: 0.125%, B: 0.013%, Re: 0.025%, and the remainder is Fe and impurities.

[0013] The present invention further provides a method for preparing a novel high manganese wear-resistant steel ZGMn14Cr4NiCuB, the preparation method comprising the following steps:

[0014] Step 1, providing the following high manganese wear-resistant steel ZGMn14Cr4NiCuB elements according to mass percentage:

[0015] C: 1.05%, Si: 0.6%, Mn: 13.75%, P: 0.025%, S: 0.02%, Cr: 3.25%, Ni: 0.6%, Cu: 0.125%, B: 0.013%, Re: 0.025%, the balance is Fe and impurities;

[0016] Step 2, smelting and heat treating the high manganese wear-resistant steel ZGMn14Cr4NiCuB provided in step 1:

[0017] Step 2.1, using a medium frequency induction furnace to melt the alloy elements C, Si, Mn, P, S, Cr, Ni, Cu, B, Re, that is, raw material melting, deoxidation, composition adjustment:

[0018] Step 2.11 Smelt and add each element material of high manganese wear-resistant steel ZGMn14Cr4NiCuB in a medium frequency induction furnace according to mass percentage. Use high-quality carbon steel, high carbon ferromanganese, medium carbon ferromanganese, high carbon ferrochrome, nickel plate, copper and ferroboron as raw materials to smelt high manganese wear-resistant steel ZGMn14Cr4NiCuB water: first put carbon steel into a medium frequency induction furnace, add high carbon ferromanganese and high carbon ferrochrome after the carbon steel is melted, the size of the material block is 50-80mm, and the precious elements Ni and Cu are added last to reduce burning loss;

[0019] Step 2.12 After the charge in the medium frequency induction furnace is melted, when the temperature of the medium frequency induction furnace reaches 1580-1600℃, insert the aluminum wire deep into the medium frequency induction furnace for deoxidation. At this time, the metal liquid surface is covered with a heating and heat-insulating covering agent to isolate it from the outside air;

[0020] Step 2.13: The cast ZGMn14Cr4NiCuB obtained in step 2.12 is calmed for 8-12 minutes to allow oxides and inclusions to float. During this period, medium carbon ferromanganese, high carbon ferrochrome, nickel plate and copper are used to adjust the content of each element. 8-10 minutes before leaving the medium frequency induction furnace, weighed ferroboron is added to the electric furnace. The mass fraction of the molten steel is controlled at: C: 1.05%, Si: 0.6%, Mn: 13.75%, P: 0.025%, S: 0.02%, Cr: 3.25%, Ni: 0.6%, Cu: 0.125%, B: 0.013%, Re: 0.025%, and the balance is Fe and impurities;

[0021] Step 2.2, when the molten steel smelting temperature reaches 1580-1650°C, the molten steel is poured into a ladle, argon is blown into the ladle after exiting the medium frequency induction furnace to purify the molten steel, and then the molten steel is allowed to stand for 2-4 minutes, and the pouring temperature is 1400-1450°C to obtain a wet ball mill liner;

[0022] Step 3, high temperature quenching and low temperature tempering process is adopted for the wet ball mill liner:

[0023] Step 3.1, the casting solution treatment temperature is 1050-1120, and the casting insulation time is determined according to the size of the casting;

[0024] Step 3.2, after the casting is heat-treated, it is taken out of the resistance furnace for heat treatment. The voltage of the resistance furnace is 380V and the maximum temperature is 1200°C. It is immediately put into water for quenching. The quenching temperature is: 1030-1080°C. The casting is cooled to room temperature and then taken out of the water;

[0025] Step 3.3, placing the alloy casting in a heat treatment resistance furnace at a temperature of 200-250°C for 4-8 hours, and air-cooling to room temperature after being taken out of the furnace.

[0026] Furthermore, the covering agent is a 722 type heating and heat preservation covering agent.

[0027] Furthermore, in step 3, the high temperature quenching temperature is 1080°C.

[0028] Furthermore, in step 3, the low temperature tempering temperature is 225°C.

[0029] The novel high manganese steel ZGMn14Cr4NiCuB of the present invention has the following superior technical effects:

[0030] 1. The new high manganese wear-resistant steel ZGMn14Cr4NiCuB material of the present invention significantly improves the wear resistance of the steel by optimizing the alloy composition and heat treatment process. Actual use shows that compared with the existing high manganese alloy steel, the service life of equipment parts is effectively extended. The service life of the wet ball mill liner in the prior art is 5-7 months, and the service life of the wet ball mill liner prepared by using the material of the present invention is as long as 10-16 months.

[0031] 2. The new high manganese wear-resistant steel ZGMn14Cr4NiCuB and its preparation method described in the present invention significantly enhance the corrosion resistance of the steel by adding chromium, nickel, copper and boron elements. Taking the wet ball mill for gold mine as an example, some minerals contain sulfur, and some minerals need to add some sodium cyanide during the grinding process, so the lining is seriously corroded and worn. The ordinary high manganese steel lining has poor corrosion resistance. The service life of the existing wet ball mill lining made of Mn13 or Mn13Cr2 in gold mine is generally 3-4 months. The service life of the wet ball mill lining made of the material of the present invention is 6-10 months in gold mine, and it can work stably under more severe working conditions.

[0032] 3. The new high manganese wear-resistant steel ZGMn14Cr4NiCuB and its preparation method of the present invention achieves effective improvement of toughness while maintaining high hardness by adding elements such as manganese, chromium, nickel, copper, and boron. The wet ball mill liner obtained by using the material and preparation method of the present invention has an initial hardness of HB Brinell hardness of HB190-240, a Rockwell hardness of 45-55HRC after impact work hardening, and an impact toughness of ≥150J / cm2, with toughness increased by 50-100%, while reducing the risk of equipment parts breaking when impacted.

[0033] 4. According to the traditional ZGMn13 or ZGMn13Cr2, after heat treatment, carbon and chromium form chromium carbide compounds, and carbon and manganese form manganese carbide compounds. Under wet working conditions, carbon in these wear-resistant carbides is quickly oxidized when it encounters water, causing surface decarburization. Manganese and chromium elements cannot form wear-resistant carbides in the absence of carbon, causing scratches and gouges during material operation. Therefore, the surface matrix hardness is reduced, the scratches become deeper, the gouges become larger, and a network of blocks is formed to peel off, resulting in chip wear. Only in the presence of many compounds, the matrix hardness is high, the scratches become shallower, the gouges become smaller, and it is not easy to form a network of blocks. The high manganese wear-resistant steel ZGMn14Cr4NiCuB is optimized in alloy composition and heat treatment process, with austenite as the matrix, and boron carbide compounds, manganese boride compounds, boron chromium compounds, silicon boron compounds, iron boride compounds, etc. are uniformly integrated into austenite to form a mixed solid solution, supported by the austenite matrix, and utilizing the wear resistance, corrosion resistance, heat resistance and other properties of the corresponding compounds contained in the high manganese wear-resistant steel ZGMn14Cr4NiCuB of the present invention. Actual use shows that scratches become shallower, gouges become smaller, and exploitation wear is achieved, especially in wet mining, acid, alkali and salt mining, which significantly improves wear resistance and corrosion resistance. The new high manganese wear-resistant steel ZGMn14Cr4NiCuB obtained by the applicant after many years of research and development provides a new material with superior performance for the application of metal wear-resistant materials under harsh working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 Schematic diagram of the metallographic structure of ordinary high manganese steel 100x.

[0035] Figure 2 Schematic diagram of the metallographic structure of ordinary high manganese steel 500x

[0036] Figure 3 Schematic diagram 100x of the metallographic structure of the new high manganese wear-resistant steel of the present invention.

[0037] Figure 4 Schematic diagram 500x of the metallographic structure of the new high manganese wear-resistant steel of the present invention. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the working platform of the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0039] Example

[0040] like Figure 1-4As shown, the new high manganese wear-resistant steel ZGMn14Cr4NiCuB of the present invention comprises: C, Si, Mn, P, S, Cr, Ni, Cu, B, Re, Fe; among the above alloy elements: manganese improves the toughness and wear resistance of steel; chromium enhances the hardness and corrosion resistance of steel; nickel and copper improve the stiffness, strength, wear resistance, corrosion resistance and heat resistance of manganese steel; boron improves the density and hardness of steel and strengthens the crystal interface; by adjusting the mass ratio of carbon, silicon, manganese, chromium, nickel, copper, boron and other elements, wear-resistant compounds can be obtained to improve yield strength and toughness; nickel, copper and boron are added on the basis of chromium in high manganese, wherein nickel is a strong austenite stabilizing element, and increasing the content of nickel is conducive to stabilizing the tensile strength and impact value of wear-resistant steel, specifically:

[0041] Nickel can increase the elastic modulus of high manganese steel, making its mechanical properties more uniform and reducing deformation caused by stress. The addition of copper improves the fluidity of molten steel, reduces defects during the pouring process, refines the grains, and improves the mechanical properties of high manganese steel.

[0042] Copper can promote the precipitation of alloy cementite, thereby playing a role of precipitation strengthening. The presence of precipitates further improves the wear resistance of steel. In addition, copper can interact with manganese and carbon to form copper-containing compounds, increasing the strength and hardness of high manganese steel. Copper can also inhibit the oxidation reaction in high manganese steel, preventing high manganese steel from being affected by oxidative corrosion, thereby improving the corrosion resistance of high manganese steel.

[0043] Boron is an element with active chemical properties. Boron and carbon form boron carbide compounds, boron and manganese form manganese boride compounds, boron and chromium form boron chromium compounds, boron and silicon form silicon-boron compounds, and boron and iron form iron boride compounds, which further improve the wear resistance and corrosion resistance of steel.

[0044] In some specific examples of the present invention, rare earth elements with a mass percentage not exceeding 0.02% are added to the new high manganese steel ZGMn14Cr4NiCuB, and the austenitizing temperature and cooling water temperature are adjusted according to the alloy composition to improve the molten steel quality and cast structure.

[0045] In some specific examples of the present invention, the new high manganese steel ZGMn14Cr4NiCuB includes, by percentage, C: 0.9-1.2%, Si: 0.4-0.8%, Mn: 13-14.5%, P≤0.05%, S≤0.04%, Cr: 2.5-4.0%, Ni: 0.2-1.0%, Cu: 0.1-0.15%, B: 0.005-0.02%, Re: 0.02-0.03%, and the balance is Fe and impurities.

[0046] In some specific examples of the present invention, the new high manganese steel ZGMn14Cr4NiCuB is composed of the following mass percentages: C: 1.05%, Si: 0.6%, Mn: 13.75%, P: 0.025%, S: 0.02%, Cr: 3.25%, Ni: 0.6%, Cu: 0.125%, B: 0.013%, Re: 0.025%, and the remainder is Fe and impurities.

[0047] The present invention further provides a method for preparing a novel high manganese wear-resistant steel ZGMn14Cr4NiCuB, the preparation method comprising the following steps:

[0048] Step 1, providing the following high manganese wear-resistant steel ZGMn14Cr4NiCuB elements according to mass percentage:

[0049] C: 1.05%, Si: 0.6%, Mn: 13.75%, P: 0.025%, S: 0.02%, Cr: 3.25%, Ni: 0.6%, Cu: 0.125%, B: 0.013%, Re: 0.025%, the balance is Fe and impurities;

[0050] Step 2, smelting and heat treating the high manganese wear-resistant steel ZGMn14Cr4NiCuB element provided in step 1

[0051] Step 2.1, using a medium frequency induction furnace to melt the alloy elements C, Si, Mn, P, S, Cr, Ni, Cu, B, Re, that is, raw material melting, deoxidation, composition adjustment:

[0052] Step 2.11 Smelt and add each element material of high manganese wear-resistant steel ZGMn14Cr4NiCuB in a medium frequency induction furnace according to mass percentage. Use high-quality carbon steel, high carbon ferromanganese, medium carbon ferromanganese, high carbon ferrochrome, nickel plate, copper and ferroboron as raw materials to smelt high manganese wear-resistant steel ZGMn14Cr4NiCuB water: first put carbon steel into a medium frequency induction furnace, add high carbon ferromanganese and high carbon ferrochrome after the carbon steel is melted, the size of the material block is 50-80mm, and the precious elements Ni and Cu are added last to reduce burning loss;

[0053] Step 2.12 After the charge in the medium frequency induction furnace is melted, when the temperature of the medium frequency induction furnace reaches 1580-1600℃, insert the aluminum wire deep into the medium frequency induction furnace for deoxidation. At this time, the metal liquid surface is covered with a heating and heat-insulating covering agent to isolate it from the outside air;

[0054] Step 2.13: The cast ZGMn14Cr4NiCuB obtained in step 2.12 is calmed for 8-12 minutes to allow oxides and inclusions to float. During this period, medium carbon ferromanganese, high carbon ferrochrome, nickel plate and copper are used to adjust the content of each element. 8-10 minutes before being taken out of the furnace, weighed ferroboron is added to the electric furnace. The mass fraction of the molten steel is controlled at: C: 1.05%, Si: 0.6%, Mn: 13.75%, P: 0.025%, S: 0.02%, Cr: 3.25%, Ni: 0.6%, Cu: 0.125%, B: 0.013%, Re: 0.025%, and the balance is Fe and impurities;

[0055] Step 2.2, when the molten steel smelting temperature reaches 1580-1650°C, the molten steel is poured into a ladle, argon is blown into the ladle after exiting the medium frequency induction furnace to purify the molten steel, and then the molten steel is allowed to stand for 2-4 minutes, and the pouring temperature is 1400-1450°C to obtain a wet ball mill liner;

[0056] Step 3, high temperature quenching and low temperature tempering process is adopted for the wet ball mill liner:

[0057] Step 3.1, the casting solution treatment temperature is 1050-1120, and the casting insulation time is determined according to the size of the casting;

[0058] Step 3.2, after the casting is heat-treated, it is taken out of the resistance furnace for heat treatment. The voltage of the resistance furnace is 380V and the maximum temperature is 1200°C. It is immediately put into water for high-temperature quenching. The high-temperature quenching temperature is: 1030-1080°C. The casting is cooled to room temperature and then taken out of the water;

[0059] Step 3.3, placing the alloy casting in a heat treatment resistance furnace at a temperature of 200-250°C for 4-8 hours, and air-cooling to room temperature after taking it out of the furnace.

[0060] In some embodiments of the present invention, in step 2, the covering agent is a 722 type heat-generating and heat-insulating covering agent.

[0061] In some embodiments of the present invention, in step 3, the high temperature quenching temperature is 1080°C.

[0062] In some embodiments of the present invention, in step 3, the low temperature tempering temperature is 225°C.

[0063] Reference Manual Attached Figure 1-4 , attached to the instruction manual Figure 1-2 The metallographic structure of the conventional high manganese steel shown in the prior art is consistent with the metallographic structure of the present invention. Figure 3-4 The comparison of the metallographic structures of the novel high manganese wear-resistant steel of the present invention is able to fully demonstrate the superior technical effects of the present invention.

[0064] It should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the concept and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A new type of high manganese wear-resistant steel ZGMn14Cr4NiCuB, including: C, Si, Mn, P, S, Cr, Ni, Cu, B, Re, Fe.

2. The new high manganese steel ZGMn14Cr4NiCuB according to claim 1 comprises, by mass percentage: C: 0.9~1.2%, Si: 0.4~0.8%, Mn: 13~14.5%, P≤0.05%, S≤0.04%, Cr: 2.5~4.0%, Ni: 0.2~1.0%, Cu: 0.1~0.15%, B: 0.005~0.02%, Re: 0.02~0.03%, the balance is Fe and impurities.

3. According to the new high manganese steel ZGMn14Cr4NiCuB as claimed in claim 1, the new high manganese steel ZGMn14Cr4NiCuB comprises the following components in percentage by mass: C: 1.05%, Si: 0.6%, Mn: 13.75%, P: 0.025%, S: 0.02%, Cr: 3.25%, Ni: 0.6%, Cu: 0.125%, B: 0.013%, Re: 0.025%, and the remainder is Fe and impurities.

4. According to claim 1, rare earth elements are added to the new high manganese steel ZGMn14Cr4NiCuB, by adding rare earth elements to the new high manganese steel ZGMn14Cr4NiCuB, the mass percentage of the added rare earth elements does not exceed 0.002%, and the austenitizing temperature and the cooling water temperature are adjusted according to the alloy composition to improve the molten steel quality and the cast structure.

5. The method for preparing the novel high manganese wear-resistant steel ZGMn14Cr4NiCuB according to claim 1 comprises the following steps: Step 1, providing the following high manganese wear-resistant steel ZGMn14Cr4NiCuB elements according to mass percentage: C: 1.05%, Si: 0.6%, Mn: 13.75%, P: 0.025%, S: 0.02%, Cr: 3.25%, Ni: 0.6%, Cu: 0.125%, B: 0.013%, Re: 0.025%, and the balance is Fe and impurities; Step 2, smelting and heat treating the high manganese wear-resistant steel ZGMn14Cr4NiCuB provided in step 1: Step 2.1, using a medium frequency induction furnace to smelt alloy elements C, Si, Mn, P, S, Cr, Ni, Cu, B, Re, melt the raw materials, deoxidize, and adjust the element composition: Step 2.11 Melt the added high manganese wear-resistant steel ZGMn14Cr4NiCuB in a medium frequency induction furnace according to the mass percentage of each element material, using high-quality carbon steel, high carbon ferromanganese, medium carbon ferromanganese, high carbon ferrochrome, nickel plate, copper, and ferroboron as raw materials to melt high manganese wear-resistant steel ZGMn14Cr4NiCuB water: first put the carbon steel into the medium frequency induction furnace, add high carbon ferromanganese and high carbon ferrochrome after the carbon steel is melted, the material block size is 50-80mm, and the precious elements Ni and Cu are added last to reduce burning loss; Step 2.12 When the charge in the medium frequency induction furnace is melted and the furnace temperature of the medium frequency induction furnace reaches 1580-1600℃, insert the aluminum wire deep into the medium frequency induction furnace for deoxidation. At this time, the metal liquid surface is covered with a heating and heat-insulating covering agent to isolate it from the outside air; Step 2.13: The cast ZGMn14Cr4NiCuB obtained in step 2.12 is calmed for 8-12 minutes to allow oxides and inclusions to float. During this period, medium carbon ferromanganese, high carbon ferrochrome, nickel plate and copper are used to adjust the content of each element. 8-10 minutes before leaving the medium frequency induction furnace, weighed ferroboron is added to the electric furnace. The mass fraction of the molten steel is controlled at: C: 1.05%, Si: 0.6%, Mn: 13.75%, P: 0.025%, S: 0.02%, Cr: 3.25%, Ni: 0.6%, Cu: 0.125%, B: 0.013%, Re: 0.025%, and the balance is Fe and impurities; Step 2.2, when the molten steel smelting temperature reaches 1580-1650°C, the molten steel is poured into the ladle, and after exiting the medium frequency induction furnace, argon is blown into the ladle to purify the molten steel, and then the molten steel is allowed to stand for 2-4 minutes, and the pouring temperature is 1400-1450°C to obtain a wet ball mill liner; Step 3, high temperature quenching and low temperature tempering process is adopted for the wet ball mill liner: Step 3.1, the casting solution treatment temperature is 1050-1120℃, and the casting insulation time is determined according to the size of the casting; Step 3.2, after the casting is heat-treated, it is taken out of the resistance furnace for heat treatment. The voltage of the resistance furnace is 380V and the maximum temperature is 1200°C. It is immediately put into water for high-temperature quenching. The high-temperature quenching temperature is: 1030-1080°C. The casting is cooled to room temperature and then taken out of the water; Step 3.3, placing the alloy casting in a heat treatment resistance furnace for low temperature tempering, keeping the temperature at 200-250°C for 4-8 hours, and air cooling to room temperature after taking out of the furnace.

6. According to the preparation method of the new high manganese wear-resistant steel ZGMn14Cr4NiCuB as described in claim 5, the covering agent in step 2.12 is a 722 type heating and heat-insulating covering agent.

7. According to the method for preparing the new high manganese wear-resistant steel ZGMn14Cr4NiCuB as claimed in claim 5, in step 3, the high temperature quenching temperature is 1080°C.

8. According to the method for preparing the new high manganese wear-resistant steel ZGMn14Cr4NiCuB as claimed in claim 5, in step 3, the low-temperature tempering temperature is 225°C.

Images