Wallboard for light cone crusher, preparation method of wallboard and light cone crusher

Abstract

The invention discloses a wallboard for a light cone crusher, a preparation method of the wallboard and the light cone crusher. The wallboard comprises the following chemical components: 0.70%-1.15% of C, 0.20%-0.50% of Si, 9.00%-17.00% of Mn, 0.30%-0.80% of Cr, 2.00%-10.00% of Al, 0.12%-0.20% of Ce-Fe, 0.02%-0.05% of V, 0.05%-0.10% of Ti, less than or equal to 0.04% of S, less than or equal to 0.04% of P and the balance of iron and inevitable impurities. The mass ratio of Ce in Ce-Fe is 70%-80%; the wallboard is obtained through smelting, deoxidation, impurity removal and multi-element modification treatment, and then a matched multi-section heat treatment process is combined. The wallboard (a crushing wall or a rolling mortar wall) for the cone crusher is subjected to lightweight design, so that the lightweight of the wallboard is realized on the premise of ensuring the wear resistance of the wallboard.

Description

Technical Field

[0001] The invention relates to the technical field of wear-resistant steel materials, and in particular to a wall plate for a lightweight cone crusher, a preparation method thereof, and the lightweight cone crusher. Background Art

[0002] Cone crusher is the main equipment for material crushing in the fields of mining, metallurgy, electricity, cement and construction. During operation, the crushing wall or mortar wall will be subjected to strong impact, extrusion and wear and other destructive effects, making it the main consumable parts of the cone crusher. Therefore, the performance of the crushing wall or mortar wall determines the working efficiency and material crushing quality of the cone crusher. With the adjustment of industrial structure and technological innovation, energy saving and consumption reduction have become the development direction of various industries. The existing crushing wall or mortar wall for cone crushers can no longer meet the higher efficiency and low energy consumption requirements of cone crushers. Therefore, the research and development and preparation of new crushing walls or mortar walls are of great significance to the material crushing of cone crushers.

[0003] In the prior art, the higher efficiency of material crushing in the cone crusher is mainly achieved by improving the service life of the crushing wall or mortar wall of the cone crusher. For example, by introducing highly wear-resistant ceramic particles in the wear-prone area of ​​the mortar wall, and then preparing a mortar wall for steel-based composite materials with stronger wear resistance, the service life of the cone crusher is significantly improved. However, due to the significant performance differences between ceramic particles and steel materials, such as elastic modulus, thermal expansion coefficient, and wettability, the composite material always has the problem that the interface between ceramic particles and steel materials cannot be effectively compatible. At the same time, the cumbersome and complex preparation process of composite material parts also increases the preparation cost and difficulty accordingly. For another example, by preparing a bimetallic mortar wall with high manganese steel on the upper part and high carbon chromium iron on the lower part, the problem of the material crushing cavity forming a groove that cannot damage the material due to excessive wear on the lower part is effectively solved. However, this method requires first preparing the high carbon chromium iron part of the lower part of the mortar wall on a high-frequency vibration table, and then performing secondary composite casting of high manganese steel on the upper part after heat treatment and cooling, and then heat treating the upper high manganese steel area separately after the upper high manganese steel is cooled and demolded. However, this preparation method is too complicated. At the same time, multiple castings and different local heat treatments can easily cause cracks at the interface between high manganese steel and high carbon ferrochrome, making it difficult to ensure good bonding between the upper and lower parts of the mortar wall.

[0004] Therefore, the existing improvements on the preparation process of the crushing wall or mortar wall of the cone crusher have certain application-level defects, and cannot reduce the energy consumption of the cone crusher and effectively improve the wear resistance of the crushing wall or mortar wall.

[0005] In view of this, the present invention is proposed. Summary of the invention

[0006] The object of the present invention is to provide a method for preparing a wall plate for a lightweight cone crusher, a wall plate for a lightweight cone crusher and a lightweight cone crusher, so as to improve the above technical problems.

[0007] The present invention is achieved in that:

[0008] In a first aspect, the present invention provides a method for preparing a wall plate for a lightweight cone crusher, wherein the chemical composition of the prepared wall plate is as follows: C: 0.70-1.15%, Si: 0.20-0.50%, Mn: 9.00-17.00%, Cr: 0.30-0.80%, Al: 2.00-10.00%, Ce-Fe: 0.12-0.20%, V: 0.02-0.05%, Ti: 0.05-0.10%, S≤0.04%, P≤0.04%, and the rest are iron and unavoidable impurities; wherein the mass ratio of Ce in Ce-Fe is 70%-80%;

[0009] The preparation method comprises:

[0010] The raw materials containing manganese, silicon, chromium and carbon are melted, the composition before the furnace is adjusted, and the ferrocerium alloy is used to deoxidize and remove impurities, and pure aluminum is added before the molten steel comes out of the furnace;

[0011] The smelted molten steel is poured into a ladle and allowed to stand for a long time to undergo a modification treatment, and then cast after the temperature of the melt in the ladle drops to a casting temperature to obtain a casting; wherein, before the molten steel is poured, the ladle is preheated, and ferrovanadium and ferrotitanium are placed at the bottom and middle of the ladle;

[0012] After the casting is cooled, it is subjected to a multi-stage heat treatment, wherein the multi-stage heat treatment is performed at a temperature of 800°C to 900°C and 1000°C to 1100°C in sequence for the first two-stage heat treatment, and after cooling, the second two-stage heat treatment is performed again at a temperature of 250°C to 280°C and 360°C to 450°C in sequence.

[0013] In an optional embodiment, ferrocerium alloy is added 5 minutes before the molten steel is discharged from the furnace for deoxidation and impurity removal.

[0014] In an optional embodiment, the ferrovanadium and the ferrotitanium are placed in the bottom and middle of the ladle in the form of particles wrapped in iron sheets.

[0015] In an optional embodiment, in the first two-stage heat treatment, the holding time at a temperature of 800°C to 900°C is 0.4h to 0.6h, and the holding time at a temperature of 1000°C to 1100°C is 2h to 5h;

[0016] And / or, in the second two-stage heat treatment, the holding time at a temperature of 250° C. to 280° C. is 0.4 h to 0.6 h, and the holding time at a temperature of 360° C. to 450° C. is 4 h to 8 h.

[0017] In an optional embodiment, in the first two-stage heat treatment, the casting is heated from room temperature to 800°C to 900°C at a heating rate of 50°C to 100°C / h, and then the temperature is raised to 1000°C to 1100°C at a heating rate of 100°C to 150°C / h;

[0018] And / or, in the second two-stage heat treatment, the casting is heated from room temperature to 250°C to 280°C at a heating rate of 40°C to 60°C / h, and then the temperature is raised to 360°C to 450°C at a heating rate of 100°C to 150°C / h.

[0019] In an optional embodiment, the wall panel is a crushed wall or a mortar wall.

[0020] In an optional embodiment, preheating the ladle includes: high-temperature preheating at a temperature above 350° C. for more than 3 hours.

[0021] In a second aspect, the present invention provides a wall panel for a lightweight cone crusher, which is prepared by the preparation method described in any one of the aforementioned embodiments.

[0022] In an alternative embodiment, the density of the wall panel is 6.7 g / cm 3 ~7.5g / cm 3 Compared with the ZG100Mn13 of the national standard GB / T5680-2023 "Austenitic manganese steel castings", the weight is reduced by 6.0-15.0%, and the wear resistance is improved by more than 20%.

[0023] In a third aspect, the present invention provides a lightweight cone crusher, which comprises the wall panel as described in the above embodiment.

[0024] The present invention has the following beneficial effects: through the composition design of the wall plate (such as the crushing wall or the rolling mortar wall) of the cone crusher, multi-element modification treatment and matching heat treatment process, the density of the material is effectively reduced, the weight of the crushing wall or the rolling mortar wall and other parts is achieved, and at the same time, its wear resistance is also improved. In addition, it does not contain expensive refractory metal elements such as Ni, Co, W, Nb, Mo, etc., which significantly reduces the production cost and preparation difficulty. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be described clearly and completely below. If the specific conditions are not specified in the embodiments, they are carried out according to conventional conditions or conditions recommended by the manufacturer. If the manufacturer of the reagents or instruments used is not specified, they are all conventional products that can be purchased commercially.

[0026] The following is a detailed description of a wall plate for a lightweight cone crusher and a preparation method thereof, and the lightweight cone crusher provided by the present invention.

[0027] Some embodiments of the present invention provide a method for preparing a wall panel for a lightweight cone crusher, wherein the chemical composition of the prepared wall panel is: C: 0.70-1.15%, Si: 0.20-0.50%, Mn: 9.00-17.00%, Cr: 0.30-0.80%, Al: 2.00-10.00%, Ce-Fe: 0.12-0.20%, V: 0.02-0.05%, Ti: 0.05-0.10%, S≤0.04%, P≤0.04%, and the rest are iron and unavoidable impurities; wherein the mass ratio of Ce in Ce-Fe is 70%-80%.

[0028] The composition of alloy elements is designed to improve the wear resistance of the wall panel material and reduce its density to achieve lightweight. Among them, C is an austenite and carbide forming element in steel materials. The appropriate C content can ensure the plasticity, toughness, hardness and wear resistance of the material; Mn can promote and stabilize the formation of austenite phase in steel materials. The appropriate Mn content is conducive to the transformation of γ→ε, ensuring good plasticity and toughness of the material; Cr element is not only a strong carbide forming element in steel materials, but the appropriate Cr content will also improve the hardenability of the material, thereby reducing the temper brittleness of the material; Si is a ferrite forming element. The appropriate Si The content can also inhibit the precipitation of the relatively brittle β-Mn phase; Al is a ferrite-forming element and a light element, which is also the key to ensure the lightweight of steel materials; the appropriate content of Ce can play a role in desulfurization and deoxidation, effectively purify the molten steel, and control the morphology and distribution of inclusions in the organization; V and C can form stable refractory carbides, and the appropriate V content can keep the steel at a high temperature and maintain a fine-grained structure, greatly reducing the overheating sensitivity of the steel; Ti is a ferrite-forming element, which can reduce the austenite phase area and regulate the hardenability of the steel. The appropriate Ti content will improve the impact toughness, hardness and wear resistance of the material. The wall panel material does not contain expensive refractory metal elements such as Ni, Co, W, Nb, and Mo, which significantly reduces the production cost and preparation difficulty.

[0029] The preparation method of the wall panel comprises:

[0030] S1. Smelt the raw materials containing manganese, silicon, chromium and carbon, adjust the composition before furnace, deoxidize and remove impurities through ferrocerium alloy, and add pure aluminum before molten steel comes out of furnace.

[0031] For reference, in step S1 of some embodiments, raw materials containing manganese, silicon, chromium and carbon are smelted, and the raw materials can mainly be ferromanganese, ferrosilicon, ferrochrome, etc. In order to achieve better deoxidation and impurity removal, ferrocerium alloy is generally added 5 minutes before the molten steel is discharged from the furnace for deoxidation and impurity removal.

[0032] It should be noted that, in the embodiment of the present invention, an appropriate amount of light element aluminum is added, and pure aluminum is added before the molten steel is taken out of the furnace.

[0033] S2. Pour the smelted molten steel into a ladle and let it stand for a long time to undergo a metamorphic treatment. After the temperature of the melt in the ladle drops to a casting temperature, casting is performed to obtain a casting. Before the molten steel is poured in, the ladle is preheated, and ferrovanadium and ferrotitanium are placed at the bottom and the middle of the ladle.

[0034] In step S2 of some embodiments, in order to achieve a better modification effect, ferrovanadium and ferrotitanium are placed in the bottom and middle of the ladle in the form of iron-covered particles. This upper and lower distribution method can extend the action time and spatial range of the modifier in the molten metal to a certain extent, thereby more effectively improving the metal structure and properties, reducing component segregation, and improving the quality and mechanical properties of the casting.

[0035] In some implementations, in order to achieve a better metamorphic effect, the ladle needs to be preheated, and the specific operation is: high-temperature preheating at a temperature above 350° C. for more than 3 hours.

[0036] S3. After the casting is cooled, it is subjected to a multi-stage heat treatment. The multi-stage heat treatment is performed at 800°C to 900°C and 1000°C to 1100°C in sequence for the first two-stage heat treatment. After cooling, the casting is subjected to a second two-stage heat treatment in sequence at 250°C to 280°C and 360°C to 450°C.

[0037] The multi-stage heat treatment can refine the grains and fully eliminate the internal stress, thereby improving the organizational properties of the casting and enhancing the comprehensive mechanical properties of the casting. For reference, in the embodiment of the present invention, it is mainly divided into four stages of heat treatment, wherein the first two stages of heat treatment are the first heat treatment, which is a continuous heating heat treatment, that is, the casting is first heated to 800°C to 900°C, for example, 800°C, 810°C, 820°C, 830°C, 840°C, 850°C, 860°C, 870°C, 880°C, 890°C, 900°C, 910°C, 920°C, 930°C, 940°C, 950°C, 960°C, 970°C, 980°C, 990°C, 1000°C, 1010°C, 1020°C, 1030°C, 1040°C, 1050°C, 1060°C, 1070°C, 1080°C, 1090°C, 1110°C, 1120°C, 1130°C, 1140°C, 1150°C, 1160°C 0℃, 870℃, 880℃, 890℃ or 900℃, etc., and then maintain the temperature for 0.4-0.6h, for example, 0.5h, and then continue to heat to 1000℃-1100℃, for example, 1000℃, 1010℃, 1020℃, 1030℃, 1040℃, 1050℃, 1060℃, 1070℃, 1080℃, 1090℃ or 1100℃, etc., and keep warm for 2h-5h, for example, 3h, 4h, etc.

[0038] It should be noted that in the two-stage heating heat treatment process of this stage, the casting is heated from room temperature to 800℃~900℃ at a heating rate of 50℃~100℃ / h, and then the temperature is raised to 1000℃~1100℃ at a heating rate of 100℃~150℃ / h; the heating rate has a certain influence on its heat treatment effect. If the heating rate is too large, the temperature difference between the inside and outside of the casting will increase rapidly, which is easy to cause a sharp increase in thermal stress and deformation of the casting. If the heating rate is too slow, it is easy to cause some undesirable organizational changes, which is not conducive to the improvement of the comprehensive performance of the casting. Obviously, in the above implementation mode, the heating rate of heating to the temperature of the second stage is relatively greater than the heating rate of the first stage. The reason is that when the second heating is carried out, the casting has been at a higher temperature for a period of time. When it is heated again, the temperature difference between the inside and outside is small. The faster heating is more conducive to the improvement of its organizational performance.

[0039] The latter two stages of heat treatment, i.e., the second stage heat treatment, is to heat the casting after the first stage heat treatment from room temperature to 250°C ~ 280°C, such as 250°C, 255°C, 260°C, 265°C, 270°C, 275°C or 280°C, etc., with a holding time of 0.4h ~ 0.6h, such as 0.5h, and then continue to heat to 360°C ~ 450°C, such as 360°C, 365°C, 370°C, 375°C, 380°C, 390°C, 400°C, 410°C, 420°C, 430°C, 440°C or 450°C, etc., with a holding time of 4h ~ 8h, such as 4h, 5h, 6h, 7h or 8h.

[0040] After the high temperature of the first two-stage heat treatment, cooling to room temperature can release some internal stress, but certain stress will still remain. Heat treatment at a lower temperature can further reduce these residual stresses and reduce the possibility of cracking of the casting. At the same time, the structure of the casting after the second heat treatment is more stable. Appropriate low-temperature tempering can maintain a high hardness while appropriately improving toughness, thereby optimizing the comprehensive mechanical properties of the casting.

[0041] For reference, during the second stage heat treatment, the casting is heated from room temperature to 250°C to 280°C at a heating rate of 40°C to 60°C / h, and then the temperature is raised to 360°C to 450°C at a heating rate of 100°C to 150°C / h.

[0042] Therefore, based on the above content, it can be seen that the wear resistance of the crushing wall or the mortar wall is guaranteed by the multi-element metamorphism treatment and the matching heat treatment process.

[0043] In some embodiments, the wall panel is exemplarily a crushed wall or a mortared wall.

[0044] Furthermore, some embodiments of the present invention also provide a wall panel for a lightweight cone crusher, which is prepared by the preparation method described in any of the aforementioned embodiments.

[0045] Specifically, the density of the wall plate (i.e., the crushed wall or the mortar wall) is 6.7 g / cm 3 ~7.5g / cm 3 The weight is reduced by 6.0-15.0% compared with the existing steel material (ZG100Mn13) crushing wall or mortar wall, and the wear resistance is improved by more than 20.0%.

[0046] Furthermore, some embodiments of the present invention also provide a lightweight cone crusher, which includes the wall panel as described in the aforementioned embodiment.

[0047] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0048] The following examples and comparative examples test the density of the crushing wall or mortar wall material for the prepared cone crusher according to the standard GB / T 3850-2015 "Determination of Density of Dense Sintered Metal and Cemented Carbide", and evaluate whether it has achieved lightweight. The wear behavior of the material is evaluated by GB / T 12444-2006 "Metallic Material Wear Test Method Test Ring-Test Block Sliding Wear Test". Among them, the existing steel is ZG100Mn13 of the national standard GB / T 5680-2023 "Austenitic Manganese Steel Castings".

[0049] Example 1

[0050] The present embodiment provides a wall plate (crushing wall or mortar wall) for a lightweight cone crusher, whose chemical composition is: C: 0.70%, Si: 0.20%, Mn: 9.00%, Cr: 0.30%, Al: 2.00%, Ce-Fe: 0.12%, V: 0.02%, Ti: 0.06%, S≤0.04%, P≤0.04%, and the rest are iron and unavoidable impurities, and the mass percentage of Ce in Ce-Fe is 75%.

[0051] (1) First, ferromanganese, ferrosilicon, ferrochrome and other raw materials are smelted, the composition before the furnace is adjusted, and ferrocerium alloy is used to deoxidize and remove impurities 5 minutes before the water is discharged. At the same time, pure aluminum is added before the molten steel is discharged from the furnace;

[0052] (2) Secondly, ferrovanadium and ferrotitanium particles wrapped with iron sheets are placed as modifiers at the bottom and middle of a ladle that has been preheated at a temperature of more than 350°C for more than 3 hours;

[0053] (3) Subsequently, the molten steel is poured into a ladle and allowed to stand for a long time, and then cast after the temperature of the melt in the ladle drops to the casting temperature to obtain a casting;

[0054] (4) Finally, after the casting has cooled to room temperature, it is subjected to heat treatment. The specific heat treatment process is as follows: ① The casting is heated from room temperature to 800°C at a heating rate of 50°C / h and kept at this temperature for 0.5h; ② The casting is then heated to 1000°C at a heating rate of 100°C / h, kept at this temperature for 5h, and then water-cooled to room temperature; ③ The casting is heated from room temperature to 250°C at a heating rate of 40°C / h and kept at this temperature for 0.5h; ④ The casting is then heated to 300°C at a heating rate of 50°C / h, kept at this temperature for 8h, and then removed from the furnace and air-cooled to room temperature.

[0055] The density of the crushing wall or mortar wall for the lightweight cone crusher is 7.5g / cm 3 Compared with the existing steel material (ZG100Mn13) crushing wall or mortar wall, the weight is reduced by 5.1%, and the wear resistance is improved by 20.9%.

[0056] Example 2

[0057] The chemical composition of the crushing wall or mortar wall for the novel lightweight cone crusher in this embodiment is as follows: C: 0.85%, Si: 0.40%, Mn: 12.00%, Cr: 0.50%, Al: 5.00%, Ce-Fe: 0.15%, V: 0.03%, Ti: 0.08%, S≤0.04%, P≤0.04%, and the rest are iron and unavoidable impurities, and the mass percentage of Ce in Ce-Fe is 75%.

[0058] (1) First, ferromanganese, ferrosilicon, ferrochrome and other raw materials are smelted, the composition before the furnace is adjusted, and ferrocerium alloy is used to deoxidize and remove impurities 5 minutes before the water is discharged. At the same time, pure aluminum is added before the molten steel is discharged from the furnace;

[0059] (2) Secondly, ferrovanadium and ferrotitanium particles wrapped with iron sheets are placed as modifiers at the bottom and middle of a ladle that has been preheated at a temperature of more than 350°C for more than 3 hours;

[0060] (3) Subsequently, the molten steel is poured into a ladle and allowed to stand for a long time, and then cast after the temperature of the melt in the ladle drops to the casting temperature to obtain a casting;

[0061] (4) Finally, after the casting is cooled to room temperature, it is subjected to heat treatment. The specific heat treatment process is as follows: ① The casting is heated from room temperature to 850°C at a heating rate of 60°C / h and kept at this temperature for 0.5h; ② Then the temperature is increased to 1050°C at a heating rate of 120°C / h, kept at this temperature for 5h, and then water-cooled to room temperature; ③ The above casting is heated from room temperature to 260°C at a heating rate of 50°C / h, and kept at this temperature for 0.5h; ④ Then the temperature is increased to 350°C at a heating rate of 65°C / h, kept at this temperature for 6h, and then taken out of the furnace and air-cooled to room temperature.

[0062] The density of the crushing wall or mortar wall of the lightweight cone crusher is 7.1g / cm 3 Compared with the existing steel material (ZG100Mn13) crushing wall or mortar wall, the weight is reduced by 10.1%, and the wear resistance is improved by 22.6%.

[0063] Example 3

[0064] The present embodiment provides a wall plate (crushing wall or mortar wall) for a lightweight cone crusher, whose chemical composition is: C: 1.00%, Si: 0.50%, Mn: 15.00%, Cr: 0.60%, Al: 8.00%, Ce-Fe: 0.18%, V: 0.04%, Ti: 0.08%, S≤0.04%, P≤0.04%, and the rest are iron and unavoidable impurities, and the mass percentage of Ce in Ce-Fe is 75%.

[0065] (1) First, ferromanganese, ferrosilicon, ferrochrome and other raw materials are smelted, the composition before the furnace is adjusted, and ferrocerium alloy is used to deoxidize and remove impurities 5 minutes before the water is discharged. At the same time, pure aluminum is added before the molten steel is discharged from the furnace;

[0066] (2) Secondly, ferrovanadium and ferrotitanium particles wrapped with iron sheets are placed as modifiers at the bottom and middle of a ladle that has been preheated at a temperature of more than 350°C for more than 3 hours;

[0067] (3) Subsequently, the molten steel is poured into a ladle and allowed to stand for a long time, and then cast after the temperature of the melt in the ladle drops to the casting temperature to obtain a casting;

[0068] (4) Finally, after the casting is cooled to room temperature, it is subjected to heat treatment. The specific heat treatment process is as follows: ① The casting is heated from room temperature to 860°C at a heating rate of 90°C / h and kept at this temperature for 0.5h; ② Then the temperature is increased to 1080°C at a heating rate of 130°C / h, kept at this temperature for 3.5h, and then water-cooled to room temperature; ③ The above casting is heated from room temperature to 270°C at a heating rate of 60°C / h, and kept at this temperature for 0.5h; ④ Then the temperature is increased to 380°C at a heating rate of 80°C / h, kept at this temperature for 5h, and then taken out of the furnace and air-cooled to room temperature.

[0069] The density of the crushing wall or mortar wall of the lightweight cone crusher is 6.9g / cm 3 Compared with the existing steel material (ZG100Mn13) crushing wall or mortar wall, the weight is reduced by 12.7%, and the wear resistance is improved by 23.5%.

[0070] Example 4

[0071] The present embodiment provides a wall plate (crushing wall or mortar wall) for a lightweight cone crusher, whose chemical composition is: C: 1.15%, Si: 0.45%, Mn: 17.00%, Cr: 0.65%, Al: 10.00%, Ce-Fe: 0.18%, V: 0.05%, Ti: 0.08%, S≤0.04%, P≤0.04%, and the rest are iron and unavoidable impurities, and the mass percentage of Ce in Ce-Fe is 75%.

[0072] (1) First, ferromanganese, ferrosilicon, ferrochrome and other raw materials are smelted, the composition before the furnace is adjusted, and ferrocerium alloy is used to deoxidize and remove impurities 5 minutes before the water is discharged. At the same time, pure aluminum is added before the molten steel is discharged from the furnace;

[0073] (2) Secondly, ferrovanadium and ferrotitanium particles wrapped with iron sheets are placed as modifiers at the bottom and middle of a ladle that has been preheated at a temperature of more than 350°C for more than 3 hours;

[0074] (3) Subsequently, the molten steel is poured into a ladle and allowed to stand for a long time, and then cast after the temperature of the melt in the ladle drops to the casting temperature to obtain a casting;

[0075] (4) Finally, after the casting is cooled to room temperature, it is heat treated. The specific heat treatment process is as follows: ① The casting is heated from room temperature to 900°C at a heating rate of 100°C / h and kept at this temperature for 0.5h; ② Then the temperature is increased to 1100°C at a heating rate of 150°C / h, kept at this temperature for 2h, and then water-cooled to room temperature; ③ The above casting is heated from room temperature to 280°C at a heating rate of 50°C / h, and kept at this temperature for 0.5h; ④ Then the temperature is increased to 400°C at a heating rate of 70°C / h, kept at this temperature for 4h, and then taken out of the furnace and air-cooled to room temperature.

[0076] The density of the crushing wall or mortar wall of the lightweight cone crusher is 6.7g / cm 3 Compared with the existing steel material (ZG100Mn13) crushing wall or mortar wall, the weight is reduced by 15.2%, and the wear resistance is improved by 25.5%.

[0077] Example 5

[0078] The present embodiment provides a wall plate (crushing wall or mortar wall) for a lightweight cone crusher, whose chemical composition is: C: 1.00%, Si: 0.50%, Mn: 12.00%, Cr: 0.80%, Al: 10.00%, Ce-Fe: 0.20%, V: 0.05%, Ti: 0.10%, S≤0.04%, P≤0.04%, and the rest are iron and unavoidable impurities, and the mass percentage of Ce in Ce-Fe is 75%.

[0079] (1) First, ferromanganese, ferrosilicon, ferrochrome and other raw materials are smelted, the composition before the furnace is adjusted, and ferrocerium alloy is used to deoxidize and remove impurities 5 minutes before the water is discharged. At the same time, pure aluminum is added before the molten steel is discharged from the furnace;

[0080] (2) Secondly, ferrovanadium and ferrotitanium particles wrapped with iron sheets are placed as modifiers at the bottom and middle of a ladle that has been preheated at a temperature of more than 350°C for more than 3 hours;

[0081] (3) Subsequently, the molten steel is poured into a ladle and allowed to stand for a long time, and then cast after the temperature of the melt in the ladle drops to the casting temperature to obtain a casting;

[0082] (4) Finally, after the casting is cooled to room temperature, it is subjected to heat treatment. The specific heat treatment process is as follows: ① The casting is heated from room temperature to 880°C at a heating rate of 80°C / h and kept at this temperature for 0.5h; ② Then the temperature is increased to 1065°C at a heating rate of 150°C / h, kept at this temperature for 3.5h, and then water-cooled to room temperature; ③ The above casting is heated from room temperature to 260°C at a heating rate of 50°C / h, and kept at this temperature for 0.5h; ④ Then the temperature is increased to 365°C at a heating rate of 80°C / h, kept at this temperature for 5.5h, and then taken out of the furnace and air-cooled to room temperature.

[0083] (5) Finally, the density of the crushing wall or mortar wall for the new lightweight cone crusher is 6.8 g / cm 3 Compared with the existing steel material (ZG100Mn13) crushing wall or mortar wall, the weight is reduced by 13.9%, and the wear resistance is improved by 28.0%.

[0084] Comparative Example 1

[0085] This comparative example provides a crushing wall or mortar wall for a cone crusher, whose chemical composition is: C: 1.20%, Si: 1.20%, Mn: 10.00%, Cr: 2.50%, Al: 1.00%, Ce-Fe: 0.02%, V: 0.12%, Ti: 0.14%, S≤0.04%, P≤0.04%, and the rest are iron and unavoidable impurities, and the mass percentage of Ce in Ce-Fe is 75%.

[0086] (1) First, ferromanganese, ferrosilicon, ferrochrome and other raw materials are smelted, the composition before the furnace is adjusted, and ferrocerium alloy is used for deoxidation and impurity removal 10 minutes before the water is discharged, and pure aluminum is added before the furnace is discharged;

[0087] (2) Secondly, ferrovanadium and ferrotitanium particles wrapped with iron sheets are placed as modifiers at the bottom and middle of a ladle that has been preheated at a temperature of more than 350°C for more than 3 hours;

[0088] (3) Subsequently, the molten steel is poured into a ladle and allowed to stand for a long time, and then cast after the temperature of the melt in the ladle drops to the casting temperature to obtain a casting;

[0089] (4) Finally, after the casting is cooled to room temperature, it is subjected to heat treatment. The specific heat treatment process is as follows: ① The casting is heated from room temperature to 860°C at a heating rate of 130°C / h and kept at this temperature for 0.5h; ② Then the temperature is increased to 1080°C at a heating rate of 80°C / h, kept at this temperature for 3.5h, and then water-cooled to room temperature; ③ The above casting is heated from room temperature to 270°C at a heating rate of 70°C / h, and kept at this temperature for 0.5h; ④ Then the temperature is increased to 380°C at a heating rate of 45°C / h, kept at this temperature for 5h, and then taken out of the furnace and air-cooled to room temperature.

[0090] The density of the crushing wall or mortar wall of the lightweight cone crusher is 7.8g / cm 3 Compared with the existing steel material (ZG100Mn13) crushing wall or mortar wall, the weight is reduced by 1.3%, and the wear resistance is improved by 10.5%.

[0091] Comparative Example 2

[0092] This comparative example provides a crushing wall or mortar wall for a cone crusher, whose chemical composition is: C: 1.00%, Si: 0.50%, Mn: 14.00%, Cr: 2.00%, Al: 10.00%, Ce-Fe: 0.10%, V: 0.10%, Ti: 0.10%, S≤0.04%, P≤0.04%, and the rest are iron and unavoidable impurities, and the mass percentage of Ce in Ce-Fe is 75%.

[0093] (1) First, ferromanganese, ferrosilicon, ferrochrome and other raw materials are smelted, the composition before the furnace is adjusted, and ferrocerium alloy is used to deoxidize and remove impurities 5 minutes before the water is discharged. At the same time, pure aluminum is added before the molten steel is discharged from the furnace;

[0094] (2) Secondly, ferrovanadium and ferrotitanium particles wrapped with iron sheets are placed as modifiers at the bottom and middle of a ladle that has been preheated at a temperature of more than 350°C for more than 3 hours;

[0095] (3) Subsequently, the molten steel is poured into a ladle and allowed to stand for a long time, and then cast after the temperature of the melt in the ladle drops to the casting temperature to obtain a casting;

[0096] (4) Finally, after the casting has cooled to room temperature, it is heat treated. The specific heat treatment process is as follows: ① The casting is heated from room temperature to 1050°C at a heating rate of 200°C / h, kept at this temperature for 5 hours, and then water-cooled to room temperature; ③ The casting is heated from room temperature to 300°C at a heating rate of 100°C / h, kept at this temperature for 5.5 hours, and then taken out of the furnace and air-cooled to room temperature.

[0097] The density of the crushing wall or mortar wall of the lightweight cone crusher is 6.8g / cm 3 The weight is reduced by 13.9% compared with the existing steel material (ZG100Mn13) crushing wall or mortar wall, and the wear resistance is reduced by 10%.

[0098] Comparative Example 3

[0099] This comparative example provides a crushing wall or mortar wall for a cone crusher, whose chemical composition is as follows: C: 0.80%, Si: 0.40%, Mn: 14.00%, Cr: 0.50%, Ce-Fe: 0.16%, V: 0.05%, S≤0.04%, P≤0.04%, and the rest are iron and unavoidable impurities, and the mass percentage of Ce in Ce-Fe is 75%.

[0100] (1) First, ferromanganese, ferrosilicon, ferrochrome and other raw materials are smelted, the composition before the furnace is adjusted, and ferrocerium alloy is used for deoxidation and impurity removal 5 minutes before water discharge;

[0101] (2) Secondly, ferrovanadium and ferrotitanium particles wrapped with iron sheets are placed as modifiers at the bottom and middle of a ladle that has been preheated at a temperature of more than 350°C for more than 3 hours;

[0102] (3) Subsequently, the molten steel is poured into a ladle and allowed to stand for a long time, and then cast after the temperature of the melt in the ladle drops to the casting temperature to obtain a casting;

[0103] (4) Finally, after the casting is cooled to room temperature, it is subjected to heat treatment. The specific heat treatment process is as follows: ① The casting is heated from room temperature to 880°C at a heating rate of 140°C / h and kept at this temperature for 0.5h; ② Then the temperature is increased to 1065°C at a heating rate of 70°C / h, kept at this temperature for 3.5h, and then water-cooled to room temperature; ③ The above casting is heated from room temperature to 260°C at a heating rate of 65°C / h, and kept at this temperature for 0.5h; ④ Then the temperature is increased to 365°C at a heating rate of 50°C / h, kept at this temperature for 5.5h, and then taken out of the furnace and air-cooled to room temperature.

[0104] The density of the crushing wall or mortar wall of the cone crusher is 7.9g / cm 3 The weight is not reduced compared with the existing steel material (ZG100Mn13) crushing wall or mortar wall, and the wear resistance is only improved by 15%.

[0105] Comparative Example 4

[0106] The present embodiment provides a wall plate (crushing wall or mortar wall) for a lightweight cone crusher, whose chemical composition is: C: 0.50%, Si: 0.10%, Mn: 9.00%, Cr: 0.30%, Al: 1.00%, Ce-Fe: 0.10%, V: 0.01%, Ti: 0.02%, S≤0.04%, P≤0.04%, and the rest are iron and unavoidable impurities, and the mass percentage of Ce in Ce-Fe is 70%.

[0107] (1) First, ferromanganese, ferrosilicon, ferrochrome and other raw materials are smelted, the composition before the furnace is adjusted, and ferrocerium alloy is used to deoxidize and remove impurities 5 minutes before the water is discharged. At the same time, pure aluminum is added before the molten steel is discharged from the furnace;

[0108] (2) Secondly, ferrovanadium and ferrotitanium particles wrapped with iron sheets are placed as modifiers at the bottom and middle of a ladle that has been preheated at a temperature of more than 350°C for more than 3 hours;

[0109] (3) Subsequently, the molten steel is poured into a ladle and allowed to stand for a long time, and then cast after the temperature of the melt in the ladle drops to the casting temperature to obtain a casting;

[0110] (4) Finally, after the casting has cooled to room temperature, it is subjected to heat treatment. The specific heat treatment process is as follows: ① The casting is heated from room temperature to 800°C at a heating rate of 50°C / h and kept at this temperature for 0.5h; ② The casting is then heated to 1000°C at a heating rate of 100°C / h, kept at this temperature for 5h, and then water-cooled to room temperature; ③ The casting is heated from room temperature to 250°C at a heating rate of 40°C / h and kept at this temperature for 0.5h; ④ The casting is then heated to 300°C at a heating rate of 50°C / h, kept at this temperature for 8h, and then removed from the furnace and air-cooled to room temperature.

[0111] The density of the crushing wall or mortar wall of the lightweight cone crusher is 7.8g / cm 3 Compared with the existing steel material (ZG100Mn13) crushing wall or mortar wall, the weight is reduced by 1.3%, and the wear resistance is improved by 12%.

[0112] Comparative Example 5

[0113] The chemical composition of the crushing wall or mortar wall for the novel lightweight cone crusher in this embodiment is as follows: C: 0.85%, Si: 0.40%, Mn: 12.00%, Cr: 0.50%, Al: 5.00%, Ce-Fe: 0.15%, V: 0.13%, Ti: 0.10%, S≤0.04%, P≤0.04%, and the rest are iron and unavoidable impurities, and the mass percentage of Ce in Ce-Fe is 75%.

[0114] (1) First, ferromanganese, ferrosilicon, ferrochrome and other raw materials are smelted, the composition before the furnace is adjusted, and ferrocerium alloy is used to deoxidize and remove impurities 5 minutes before the water is discharged. At the same time, pure aluminum is added before the molten steel is discharged from the furnace;

[0115] (2) Secondly, ferrovanadium and ferrotitanium particles wrapped with iron sheets are placed as modifiers at the bottom and middle of a ladle that has been preheated at a temperature of more than 350°C for more than 3 hours;

[0116] (3) Subsequently, the molten steel is poured into a ladle and allowed to stand for a long time, and then cast after the temperature of the melt in the ladle drops to the casting temperature to obtain a casting;

[0117] (4) Finally, after the casting is cooled to room temperature, it is subjected to heat treatment. The specific heat treatment process is as follows: ① The casting is heated from room temperature to 850°C at a heating rate of 60°C / h and kept at this temperature for 0.5h; ② Then the temperature is increased to 1050°C at a heating rate of 120°C / h, kept at this temperature for 5h, and then water-cooled to room temperature; ③ The above casting is heated from room temperature to 260°C at a heating rate of 50°C / h, and kept at this temperature for 0.5h; ④ Then the temperature is increased to 350°C at a heating rate of 65°C / h, kept at this temperature for 6h, and then taken out of the furnace and air-cooled to room temperature.

[0118] The density of the crushing wall or mortar wall of the lightweight cone crusher is 7.1g / cm 3 Compared with the existing steel material (ZG100Mn13) crushing wall or mortar wall, the weight is reduced by 10.1%, and the wear resistance is improved by 8%.

[0119] Comparative Example 6

[0120] The present embodiment provides a wall plate (crushing wall or mortar wall) for a lightweight cone crusher, whose chemical composition is: C: 1.00%, Si: 0.50%, Mn: 15.00%, Cr: 0.60%, Al: 8.00%, Ce-Fe: 0.18%, V: 0.04%, Ti: 0.08%, S≤0.04%, P≤0.04%, and the rest are iron and unavoidable impurities, and the mass percentage of Ce in Ce-Fe is 75%.

[0121] (1) First, ferromanganese, ferrosilicon, ferrochrome and other raw materials are smelted, the composition before the furnace is adjusted, and ferrocerium alloy is used to deoxidize and remove impurities 5 minutes before the water is discharged. At the same time, pure aluminum is added before the molten steel is discharged from the furnace;

[0122] (2) Secondly, ferrovanadium and ferrotitanium particles wrapped with iron sheets are placed as modifiers at the bottom and middle of a ladle that has been preheated at a temperature of more than 350°C for more than 3 hours;

[0123] (3) Subsequently, the molten steel is poured into a ladle and allowed to stand for a long time, and then cast after the temperature of the melt in the ladle drops to the casting temperature to obtain a casting;

[0124] (4) Finally, after the casting is cooled to room temperature, it is subjected to heat treatment. The specific heat treatment process is as follows: ① The casting is heated from room temperature to 900°C at a heating rate of 150°C / h and kept at this temperature for 0.5h; ② Then the temperature is increased to 1150°C at a heating rate of 200°C / h, kept at this temperature for 3.5h, and then water-cooled to room temperature; ③ The above casting is heated from room temperature to 270°C at a heating rate of 60°C / h, and kept at this temperature for 0.5h; ④ Then the temperature is increased to 400°C at a heating rate of 50°C / h, kept at this temperature for 5h, and then taken out of the furnace and air-cooled to room temperature.

[0125] The density of the crushing wall or mortar wall of the lightweight cone crusher is 6.9g / cm 3 Compared with the existing steel material (ZG100Mn13) crushing wall or mortar wall, the weight is reduced by 12.7%, and the wear resistance is improved by 9%.

[0126] Comparative Example 7

[0127] The present embodiment provides a wall plate (crushing wall or mortar wall) for a lightweight cone crusher, whose chemical composition is: C: 1.00%, Si: 0.50%, Mn: 15.00%, Cr: 0.60%, Al: 8.00%, Ce-Fe: 0.18%, V: 0.04%, Ti: 0.08%, S≤0.04%, P≤0.04%, and the rest are iron and unavoidable impurities, and the mass percentage of Ce in Ce-Fe is 75%.

[0128] (1) First, ferromanganese, ferrosilicon, ferrochrome and other raw materials are smelted, the composition before the furnace is adjusted, and ferrocerium alloy is used to deoxidize and remove impurities 5 minutes before the water is discharged. At the same time, pure aluminum is added before the molten steel is discharged from the furnace;

[0129] (2) Secondly, ferrovanadium and ferrotitanium particles wrapped with iron sheets are placed as modifiers at the bottom and middle of a ladle that has been preheated at a temperature of more than 350°C for more than 3 hours;

[0130] (3) Subsequently, the molten steel is poured into a ladle and allowed to stand for a long time, and then cast after the temperature of the melt in the ladle drops to the casting temperature to obtain a casting;

[0131] (4) Finally, after the casting has cooled to room temperature, it is subjected to heat treatment. The specific heat treatment process is as follows: ① The casting is heated from room temperature to 1080°C at a heating rate of 90°C / h, kept at this temperature for 3.5 hours, and then water-cooled to room temperature; ③ The casting is heated from room temperature to 380°C at a heating rate of 60°C / h, kept at this temperature for 5 hours, and then removed from the furnace and air-cooled to room temperature.

[0132] The density of the crushing wall or mortar wall of the lightweight cone crusher is 6.9g / cm 3 Compared with the existing steel material (ZG100Mn13) crushing wall or mortar wall, the weight is reduced by 12.7%, and the wear resistance is improved by 8%.

[0133] In summary, the preparation method of the embodiment of the present invention is designed to be lightweight for the crushing wall or mortar wall and other parts of the cone crusher, and the energy consumption of the crusher during operation is reduced by reducing the weight while ensuring the material crushing efficiency, and the wear resistance is also effectively improved. The method is simple to operate, low in cost, and high in production efficiency. The weight of the crushing wall for the prepared cone crusher is significantly reduced, and the mechanical properties are excellent.

[0134] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for preparing a wall plate for a lightweight cone crusher, characterized in that: The chemical composition of the prepared wallboard is: C: 0.70-1.15%, Si: 0.20-0.50%, Mn: 9.00-17.00%, Cr: 0.30-0.80%, Al: 2.00-10.00%, Ce-Fe: 0.12-0.20%, V: 0.02-0.05%, Ti: 0.05-0.10%, S≤0.04%, P≤0.04%, and the rest is iron and unavoidable impurities; wherein the mass ratio of Ce in Ce-Fe is 70%-80%; The preparation method comprises: The raw materials containing manganese, silicon, chromium and carbon are melted, the composition before the furnace is adjusted, and the ferrocerium alloy is used to deoxidize and remove impurities, and pure aluminum is added before the molten steel comes out of the furnace; The smelted molten steel is poured into a ladle and allowed to stand for a long time to undergo a modification treatment, and then cast after the temperature of the melt in the ladle drops to a casting temperature to obtain a casting; wherein, before the molten steel is poured, the ladle is preheated, and ferrovanadium and ferrotitanium are placed at the bottom and middle of the ladle; After the casting is cooled, it is subjected to a multi-stage heat treatment, wherein the multi-stage heat treatment is performed at a temperature of 800°C to 900°C and 1000°C to 1100°C in sequence for the first two-stage heat treatment, and after cooling, the second two-stage heat treatment is performed again at a temperature of 250°C to 280°C and 360°C to 450°C in sequence.

2. The method for preparing a wall plate for a lightweight cone crusher according to claim 1, characterized in that: Ferrocerium alloy is added 5 minutes before the molten steel is discharged from the furnace for deoxidation and impurity removal.

3. The method for preparing a wall plate for a lightweight cone crusher according to claim 1, characterized in that: The ferrovanadium and the ferrotitanium are placed at the bottom and the middle of the ladle in the form of granules wrapped with iron sheets.

4. The method for preparing a wall plate for a lightweight cone crusher according to claim 1, characterized in that: In the first two-stage heat treatment, the holding time at a temperature of 800°C to 900°C is 0.4h to 0.6h, and the holding time at a temperature of 1000°C to 1100°C is 2h to 5h; And / or, in the second two-stage heat treatment, the holding time at a temperature of 250° C. to 280° C. is 0.4 h to 0.6 h, and the holding time at a temperature of 360° C. to 450° C. is 4 h to 8 h.

5. The method for preparing a wall plate for a lightweight cone crusher according to claim 1, characterized in that: In the first two-stage heat treatment, the casting is heated from room temperature to 800°C to 900°C at a heating rate of 50°C to 100°C / h, and then the temperature is raised to 1000°C to 1100°C at a heating rate of 100°C to 150°C / h; And / or, in the second two-stage heat treatment, the casting is heated from room temperature to 250°C to 280°C at a heating rate of 40°C to 60°C / h, and then the temperature is raised to 360°C to 450°C at a heating rate of 100°C to 150°C / h.

6. The method for preparing a wall plate for a lightweight cone crusher according to any one of claims 1 to 5, characterized in that: The wall panel is a crushed wall or a mortar wall.

7. The method for preparing a wall plate for a lightweight cone crusher according to any one of claims 1 to 5, characterized in that: The ladle is preheated by: high temperature preheating at a temperature above 350° C. for more than 3 hours.

8. A wall plate for a lightweight cone crusher, characterized in that: The compound is prepared by the preparation method according to any one of claims 1 to 7.

9. The wall plate for a lightweight cone crusher according to claim 8, characterized in that: The density of the wallboard is 6.7 g / cm 3 ~7.5g / cm 3 Compared with the ZG100Mn13 of the national standard GB / T 5680-2023 "Austenitic manganese steel castings", the weight is reduced by 6.0-15.0%, and the wear resistance is improved by more than 20%.

10. A lightweight cone crusher, characterized in that: It comprises a wall panel as claimed in claim 8 or 9.