Bucket tooth holder material and preparation method thereof

Abstract

The invention discloses a bucket tooth holder material and a preparation method. The bucket tooth holder material comprises the following components in percentage by weight: 0.15%-0.25% of carbon, 0.80%-1.50% of silicon, 0.60%-1.20% of manganese, 0.70%-1.20% of chromium, 0.01%-0.04% of aluminum, less than 0.035% of phosphorus, less than 0.035% of sulfur, 0.001%-0.006% of boron, 0.02%-0.18% of yttrium, 0.01%-0.03% of strontium and the balance of iron and impurities. The preparation method comprises a feeding process, a component adjusting process, a heating and stirring process and a heat treatment process. The bucket tooth holder material disclosed by the invention has good low-temperature mechanical properties and wear resistance at low temperature, is widely applicable to various application ranges, and further reduces the production cost. The preparation method disclosed by the invention is wide in application range, can be used for preparing a large tooth holder material with relatively large piece weight, and also has good application potential.

Description

Technical Field

[0001] The present application relates to the field of alloy technology, and in particular to a bucket tooth seat material and a preparation method thereof. Background Art

[0002] Bucket teeth are important wear-resistant parts for construction machinery such as excavators and bulldozers. At present, large bucket teeth usually adopt a combined design, consisting of two parts: the tooth seat material and the tooth seat. Among them, the tooth seat material is the part that directly contacts the material, and needs to have good wear resistance and the characteristics of not being easy to break under high impact loads. The tooth seat is a component that is welded to the bucket at one end and connected to the tooth seat material through a pin at the other end. Through this design, the tooth seat not only has to withstand the erosion and wear from the material, but also has to transmit the bending and impact loads from the tooth seat material. Therefore, the bucket tooth seat material is required to have certain wear resistance, good welding performance and comprehensive mechanical properties. However, since the wall thickness of the tooth seat may exceed 120 mm, it is easy to appear inside the tooth seat material due to poor hardenability, making it difficult to obtain the ideal comprehensive performance. However, with the use of bucket tooth materials in various scenarios, the complex performance requirements of bucket tooth materials have been severely challenged.

[0003] At present, when applied to large bucket teeth, the thick and large parts of the tooth seat are difficult to harden, and the hardness difference between the surface and the core is large, resulting in poor wear resistance; in addition, its low-temperature toughness is low, and it is easy to break in high-cold environments and high-impact conditions, with a breakage rate as high as 3%~5%, causing huge losses. Therefore, the bucket tooth seat material and preparation method need to be improved urgently to adapt to a wide range of application environments. Summary of the invention

[0004] One purpose of the present application is to provide a bucket tooth seat material and a preparation method, which are beneficial to enhancing the mechanical properties of the bucket tooth seat material, improving the wear resistance of the seat material, and further enhancing market competitiveness.

[0005] Another object of the present application is to provide a bucket tooth seat material and a preparation method, which are conducive to reducing the production cost during preparation and further optimizing the production efficiency.

[0006] To achieve the above purpose, the technical solution adopted in the present application is to provide a bucket tooth seat material, including the following components in weight percentage: a carbon content of 0.15% to 0.25%, a silicon content of 0.80% to 1.50%, a manganese content of 0.60% to 1.20%, a chromium content of 0.70% to 1.20%, an aluminum content of 0.01% to 0.04%, a phosphorus content of less than 0.035%, a sulfur content of less than 0.035%, a boron content of 0.001% to 0.006%, a yttrium content of 0.02% to 0.18%, and a strontium content of 0.01% to 0.03%, with the remainder being iron and impurities.

[0007] In one embodiment, the carbon content is 0.17% to 0.23%, the silicon content is 0.90% to 1.20%, the manganese content is 0.80% to 1.10%, the chromium content is 0.80% to 1.10%, the yttrium content is 0.05% to 0.15%, the strontium content is 0.01% to 0.02%, and the boron content is 0.001% to 0.005%.

[0008] In one embodiment, the carbon content is 0.17% to 0.23%, the silicon content is 0.90% to 1.20%, the manganese content is 0.80% to 1.10%, the chromium content is 0.80% to 1.10%, the yttrium content is 0.05% to 0.15%, the strontium content is 0.01% to 0.02%, and the boron content is 0.001% to 0.005%.

[0009] According to another aspect of the present application, a method for preparing a bucket tooth adapter material is also provided, comprising the steps of: S100, melting the alloy forging raw material to obtain a first raw material; S200, taking the first molten raw material for component analysis, and adjusting the composition of the first raw material to have a carbon content of 0.17% to 0.23%, a silicon content of 0.90% to 1.20%, a manganese content of 0.80% to 1.10%, a chromium content of 0.80% to 1.10%, a phosphorus content of less than 0.035%, and a sulfur content of less than 0.035%, to obtain a second raw material; S300, adding the second raw material into the aluminum-yttrium alloy, the aluminum-strontium alloy and the ferroboron alloy at a first speed, and stirring, to obtain a third raw material; S400, manufacturing a bucket tooth seat material by casting and heat treating the third raw material.

[0010] In one embodiment, the step S400 further includes the steps of: S410, homogenizing the third raw material at a first temperature to cast it into a first gear seat material; S420, keeping the first gear seat material at a second temperature for 15 minutes for quenching and tempering to obtain a second gear seat material; S430, quenching the second gear seat material and cooling it to a third temperature to obtain a third gear seat material; S440, heating the third tooth seat material and keeping it at a fourth temperature for 4 hours to 12 hours, and then cooling it to room temperature in air to obtain a bucket tooth seat material.

[0011] In one embodiment, the yttrium content of the aluminum-yttrium alloy is 5%-10%, the strontium content of the aluminum-strontium alloy is 5%-10%, and the boron content of the ferroboron alloy is 20%-25%.

[0012] In one embodiment, the temperature of the second raw material in step S300 is 1680° C. to 1800° C., and the first speed is 25 kg / s to 65 kg / s.

[0013] In one embodiment, the first temperature is 850°C to 950°C, the second temperature is 850°C to 950°C, the third temperature is less than or equal to 200°C, and the fourth temperature is 450°C to 550°C.

[0014] In one embodiment, the alloy forging raw material is ZG20CrMnSi alloy.

[0015] In one embodiment, the first temperature is 900°C to 950°C, the second temperature is 850°C to 900°C, and the fourth temperature is 460°C to 530°C.

[0016] In one embodiment, the step S300 further includes the steps of: S310, placing an aluminum-yttrium alloy, an aluminum-strontium alloy and a ferroboron alloy on the bottom of a ladle; S320, adding the second raw material into the bottom of the ladle at a first speed and stirring to obtain a third raw material.

[0017] Compared with the prior art, the beneficial effects of this application are: (1) The present invention provides a bucket tooth seat material and a preparation method thereof. By optimizing the ratio of the chemical components in the bucket tooth seat material, a bucket tooth seat material with good mechanical properties and welding properties is obtained, and the bucket tooth seat material is suitable for a variety of application scenarios.

[0018] (2) The present invention provides a bucket tooth seat material and a preparation method, which improves the performance of the seat material while reducing the production cost by optimizing the preparation process in the preparation process. DETAILED DESCRIPTION

[0019] Below, the present application is further described in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0020] As used herein, the term "prepared from" is synonymous with "comprising". As used herein, the terms "comprising", "including", "having", "containing" or any other variation thereof, are intended to cover a non-exclusive inclusion. For example, a composition, step, method, article, or apparatus that includes the listed elements is not necessarily limited to only those elements, but may include other elements not expressly listed or inherent to such composition, step, method, article, or apparatus.

[0021] When an amount, concentration or parameter is expressed as a range, a preferred range, or a range limited by a series of upper preferred values ​​and lower preferred values, this should be understood as specifically disclosing the range used formed by any pairing of any range upper limit or preferred value with any range lower limit or preferred value, regardless of whether the range is disclosed separately. For example, when it is disclosed that the range is "1 to 5", the described range should be interpreted as including the range "1 to 4", "1 to 3", "1 to 2 and 4 to 5", "1 to 3 and 5", etc. When a numerical range is described in this article, unless otherwise stated, the range includes its end values ​​and all integers and fractions within the range.

[0022] Approximate terms in the specification and claims are used to modify quantities, indicating that the present invention is not limited to the specific quantity, but also includes acceptable and modified parts close to the quantity without causing changes in the relevant basic functions. Accordingly, the use of "about", "approximately", etc. to modify a numerical value means that the present invention is not limited to the exact numerical value. In some examples, the approximate terms may correspond to the accuracy of the instrument for measuring the numerical value. In the specification and claims of this application, range limitations can be combined and / or interchanged, and if not otherwise stated, these ranges include all subranges contained therein.

[0023] According to one aspect of the present invention, a bucket tooth adapter material includes the following components in weight percentage: a carbon content of 0.15% to 0.25%, a silicon content of 0.80% to 1.50%, a manganese content of 0.60% to 1.20%, a chromium content of 0.70% to 1.20%, an aluminum content of 0.01% to 0.04%, a phosphorus content of less than 0.035%, a sulfur content of less than 0.035%, a boron content of 0.001% to 0.006%, a yttrium content of 0.02% to 0.18% and a strontium content of 0.01% to 0.03%, and the remainder is iron and impurities.

[0024] The present application optimizes the ratio of each chemical component in the bucket tooth seat material to obtain a bucket tooth seat material with good mechanical properties, welding properties and usability, and is suitable for a variety of application scenarios. Specifically, by adding yttrium, the grain size inside the alloy can be refined, thereby improving the mechanical properties and corrosion resistance of the material. Yttrium can also stabilize the dislocation substructure and strengthen the grain boundary, thereby significantly extending the creep life of the bucket tooth seat material and further improving its application performance. At the same time, the strontium element added further improves the impact toughness of the bucket tooth seat material under the action of the yttrium element to refine the grains, which helps to enhance the usability of the bucket tooth seat material. Furthermore, by adding boron, the hardenability of the bucket tooth seat material can be further improved, and its mechanical properties and wear resistance can be enhanced, thereby improving the overall usability of the bucket tooth seat material. In terms of production, the present application does not use expensive metal elements such as nickel or molybdenum when preparing the bucket tooth seat material, thereby reducing production costs and optimizing the production process, further increasing the market competitiveness of the bucket tooth seat material.

[0025] In one embodiment, the carbon content is 0.17% to 0.23%, the silicon content is 0.90% to 1.20%, the manganese content is 0.80% to 1.10%, the chromium content is 0.80% to 1.10%, the yttrium content is 0.05% to 0.15%, the strontium content is 0.01% to 0.02%, and the boron content is 0.001% to 0.005%. By adjusting the content of each component in the bucket tooth seat material, the material's performance, mechanical strength and welding performance are improved, and the material's service life is further extended.

[0026] According to another aspect of the present invention, a method for preparing a bucket tooth adapter material comprises the steps of: S100, melting the alloy forging raw material to obtain a first raw material; S200, taking the first molten raw material for component analysis, and adjusting the composition of the first raw material to have a carbon content of 0.17% to 0.23%, a silicon content of 0.90% to 1.20%, a manganese content of 0.80% to 1.10%, a chromium content of 0.80% to 1.10%, a phosphorus content of less than 0.035%, and a sulfur content of less than 0.035%, to obtain a second raw material; S300, adding the second raw material into the aluminum-yttrium alloy, the aluminum-strontium alloy and the ferroboron alloy at a first speed, and stirring, to obtain a third raw material; S400, manufacturing a bucket tooth seat material by casting and heat treating the third raw material.

[0027] Through a preparation method provided in this application, bucket tooth seat materials with good mechanical properties and performance can be prepared relatively simply. The prepared bucket tooth seat materials can be widely used in a variety of application scenarios, and have good market competitiveness and potential for application. On the other hand, this preparation method can also be used to prepare large bucket tooth seat material components with a unit weight of 300 kg or more, further meeting the needs of various forming methods such as sand core casting, metal mold casting, liquid die forging and solid hot die forging, and has wide applicability and flexibility.

[0028] In one embodiment, the step S400 further includes the steps of: S410, homogenizing the third raw material at a first temperature to cast it into a first gear seat material; S420, keeping the first gear seat material at a second temperature for 15 minutes to obtain a second gear seat material; S430, quenching the second gear seat material and cooling it to a third temperature to obtain a third gear seat material; S440, heating the third tooth seat material and keeping it at a fourth temperature for 4 hours to 12 hours, and then cooling it to room temperature in air to obtain a bucket tooth seat material.

[0029] In step S410 of the preparation method, the stress and structural inhomogeneity inside the forging of the bucket tooth seat material can be effectively eliminated by homogenization treatment, and the internal grains of the bucket tooth seat material can be further refined. This helps to improve the overall performance of the bucket tooth seat material and reduce the risk of cracks and deformation in the forging during subsequent processing, thereby extending the service life of the bucket tooth material and enhancing market competitiveness. On the other hand, in step S430, the hardness and mechanical properties of the bucket tooth seat material are significantly improved by quenching treatment, and certain toughness and wear resistance are increased. The quenching treatment also optimizes the stress distribution inside the material, improves fatigue resistance and fracture resistance, thereby enhancing the performance. The low-temperature tempering treatment in step S440 introduced after the quenching treatment helps to eliminate the stress generated during the quenching process, prevent the occurrence of grinding and cracking, and further improve the mechanical properties of the bucket tooth seat material. In addition, the low-temperature tempering treatment also helps to improve the microstructure of the material, and the oxide layer formed further enhances the corrosion resistance of the bucket tooth seat material and reduces the surface roughness, thereby improving the comprehensive performance of the material.

[0030] In one embodiment, the yttrium content in the aluminum-yttrium alloy is 5% to 10%, specifically, the yttrium content in the aluminum-yttrium alloy is 5%, 6%, 7%, 8%, 9% and 10%. In other words, yttrium is an efficient grain refiner that can significantly reduce the grain size in the aluminum alloy, thereby improving the strength and hardness of the material. In other words, the aluminum-yttrium alloy combines the lightweight properties of aluminum with the strengthening effect of yttrium, so that it has higher mechanical strength and wear resistance while maintaining a lower density.

[0031] In one embodiment, the strontium content in the aluminum-strontium alloy is 5% to 10%, specifically, the strontium content in the aluminum-strontium alloy is 5%, 6%, 7%, 8%, 9% and 10%. It can be understood that the addition of strontium can also play a role in refining the grain size, thereby enhancing the wear resistance and mechanical strength of the bucket tooth seat material, and the good toughness of the aluminum-strontium alloy is conducive to the design and manufacture of bucket tooth materials. Therefore, by adding aluminum-yttrium alloy or aluminum-strontium alloy, the comprehensive performance of the bucket tooth seat material can be significantly improved, including strength, hardness, corrosion resistance, thermal conductivity, toughness, plasticity and impact toughness, thereby improving the service life and work efficiency of the bucket teeth.

[0032] In one embodiment, the boron content in the ferroboron alloy is 20% to 25%. Specifically, the boron content in the ferroboron alloy is 20%, 21%, 22%, 23%, 24% and 25%. By adding the boron element, the hardenability of the bucket tooth seat material can be significantly improved. With the increase in hardenability, a more uniform martensitic structure can be formed inside the bucket tooth forging during the quenching process, thereby further improving the wear resistance, hardness and mechanical strength of the bucket tooth material. In other words, with the increase of quenching temperature, the hardness and tensile strength of the bucket tooth material both show an upward trend. This is because austenitization is more sufficient at high temperature and the distribution of alloy elements is more uniform, thereby increasing the stability of supercooled austenite. In addition, bucket tooth materials with higher hardenability can obtain better impact toughness and elongation after quenching treatment, thereby extending the service life.

[0033] In one embodiment, the second raw material temperature in step S300 is 1680°C to 1800°C, specifically, the second raw material temperature is 1680°C, 1690°C, 1700°C, 1710°C, 1720°C, 1730°C, 1740°C, 1750°C, 1760°C, 1770°C, 1780°C, 1790°C, 1800°C, and further preferably, the second raw material temperature is 1700°C to 1730°C. By melting the raw material at high temperature, impurities therein can be effectively removed, thereby improving the purity of the material. On the one hand, high-temperature melting treatment helps to obtain a more uniform and complete microstructure, thereby enhancing the overall performance of the bucket tooth seat material. On the other hand, the alloy material melted at high temperature has good hardenability, which enables a more uniform martensitic structure to be formed during the quenching process, thereby significantly improving the wear resistance, hardness and mechanical strength of the bucket tooth seat material. In addition, the alloy surface that has undergone high-temperature melting treatment will produce a more uniform oxide film structure, further enhancing the material's wear resistance and corrosion resistance, making it suitable for a variety of application environments.

[0034] In one embodiment, the first speed is 25kg / s to 65kg / s, specifically, the first speed is 25kg / s, 30kg / s, 35kg / s, 40kg / s, 45kg / s, 50kg / s, 55kg / s, 60kg / s and 65kg / s. The ladle speed is one of the key parameters in the casting process. Its reasonable control is of great significance for ensuring the quality of castings, improving production efficiency and reducing production costs. The production efficiency can be improved by an appropriate ladle speed. When the ladle speed is too high, the temperature of the molten metal may drop rapidly, affecting the fluidity, thereby increasing the risk of defects in the bucket tooth seat forgings. On the other hand, when the ladle speed is too slow, the cooling speed of the bucket tooth seat forgings may be uneven, affecting the mechanical properties and performance of the final product.

[0035] In one embodiment, the first temperature is 850°C to 950°C, specifically, the first temperature is 850°C, 860°C, 870°C, 880°C, 890°C, 900°C, 910°C, 920°C, 930°C, 940°C, and 950°C. The homogenization treatment can improve the internal structure and performance of the bucket tooth material, improve the crystal structure inside the alloy, further eliminate the casting stress, and improve the overall performance of the bucket tooth material. It is understandable that when the homogenization temperature is too high, the bucket tooth material may be overburned. Once overburning occurs, the bucket tooth material must be scrapped as a whole and then remelted, resulting in huge economic losses. Therefore, choosing a suitable homogenization temperature is crucial to avoid overburning and maintain material performance.

[0036] In one embodiment, the second temperature is 850° C. to 950° C., specifically, the second temperature is 850° C., 860° C., 870° C., 880° C., 890° C., 900° C., 910° C., 920° C., 930° C., 940° C., 950° C. Through high temperature treatment, the tooth seat material is heated to above the critical temperature to reach the austenite region, so that carbon is dissolved into the iron matrix to form a uniform austenite structure.

[0037] In one embodiment, the third temperature is less than or equal to 200°C. Through quenching, the material is heated to above the critical temperature and then rapidly cooled, which causes the material structure to transform into martensite, thereby significantly improving the hardness and wear resistance. When the quenching temperature is low, the impact toughness of the bucket tooth material is reduced due to uneven austenitization or more ferrite inside the bucket tooth material, thereby reducing the stability of the material during use. When the quenching temperature is too high, the martensite obtained after quenching is also coarse due to the coarsening of austenite grains during heating, thereby reducing the impact toughness of the bucket tooth material.

[0038] In one embodiment, the fourth temperature is 450°C to 550°C, specifically, the fourth temperature is 450°C, 460°C, 470°C, 480°C, 490°C, 500°C, 510°C, 520°C, 530°C, 540°C and 550°C. Among them, since the tempered martensite structure obtained by low-temperature tempering treatment has the advantages of hardness and good wear resistance, it has the advantages of high strength and excellent fatigue resistance when used, which is conducive to improving the service life of the bucket tooth material. Low-temperature tempering treatment can also eliminate quenching stress and improve the plasticity and toughness of the bucket tooth material. On the one hand, when the low-temperature tempering temperature is too high, the stability of the tempered martensite is reduced, which further reduces the impact toughness, strength and wear resistance of the bucket tooth material. On the other hand, too high tempering temperature may increase the tendency of heat treatment deformation and cracking of the bucket tooth material, affecting the dimensional stability and service life of the bucket tooth material. When the low-temperature tempering temperature is too low, the quenching stress inside the bucket tooth material is not completely eliminated, further reducing the performance of the bucket tooth material.

[0039] In one embodiment, the alloy forging raw material is ZG20CrMnSi alloy. Among them, ZG20CrMnSi alloy has a lower carbon content, and materials with low carbon content generally have better welding performance. Furthermore, due to the chromium element inside the bucket tooth seat material, the yield limit, impact toughness and wear resistance of the material can be improved, while the thermal cracking tendency can be reduced, thereby improving the performance of the bucket tooth seat material.

[0040] In one embodiment, the first temperature is 900° C. to 950° C., the second temperature is 850° C. to 900° C., and the fourth temperature is 460° C. to 530° C. Using a suitable processing temperature in heat treatment is conducive to improving the performance and service life of bucket tooth adapter materials, and further improving the market competitiveness of bucket tooth adapter materials.

[0041] In one embodiment, the step S300 further includes the steps of: S310, placing an aluminum-yttrium alloy, an aluminum-strontium alloy and a ferroboron alloy on the bottom of a ladle; S320, adding the second raw material into the bottom of the ladle at a first speed and stirring to obtain a third raw material.

[0042] This process can not only improve the mechanical hardness and wear resistance of the bucket tooth seat material, but also enhance its impact resistance and impact toughness, thereby extending the service life of the bucket tooth seat material. In addition, by controlling the temperature of the molten steel and the pouring process, the microstructure and mechanical properties of the bucket tooth can be further optimized.

[0043] Example 1 A bucket tooth adapter material comprises the following components in percentage by weight: 0.20% carbon, 1.00% silicon, 0.90% manganese, 1.00% chromium, 0.02% aluminum, 0.010% phosphorus, 0.010% sulfur, 0.004% boron, 0.10% yttrium, 0.015% strontium, and the remainder is iron and impurities.

[0044] Example 2 The difference between Example 2 and Example 1 is that the content of yttrium is 0.06%.

[0045] Example 3 The difference between Example 3 and Example 1 is that the content of yttrium is 0.13%.

[0046] Example 4 The difference between Example 4 and Example 1 is that the content of strontium is 0.010%.

[0047] Example 5 The difference between Example 5 and Example 1 is that the content of strontium is 0.020%.

[0048] Comparative Example 1 A bucket tooth seat material comprises the following components in percentage by weight: 0.20% carbon, 1.00% silicon, 0.90% manganese, 1.00% chromium, 0.02% aluminum, 0.010% phosphorus, 0.010% sulfur, 0.004% boron, 0.10% yttrium, and the remainder is iron and impurities.

[0049] Performance Evaluation The tooth adapter materials in Examples 1 to 5 and Comparative Example 1 were subjected to hardness tests and low-temperature impact tests at -40°C, and the production costs were estimated based on the price of ZG20CrMnSi alloy. The test results are shown in Table 1.

[0050] Table 1: Performance test of bucket tooth adapter materials

[0051] Referring to Table 1, it can be seen that by increasing the content of yttrium, the hardness of the bucket tooth seat material is significantly improved, which indicates that the yttrium element improves the hardness inside the material by refining the grains, thereby enhancing its wear resistance. However, at this time, the impact toughness of the bucket tooth seat material in Example 3 at low temperatures is poor, which is not conducive to the practical application of bucket tooth materials. On the other hand, due to the high price of yttrium, as the yttrium content increases, the production cost of bucket tooth materials also increases, which limits its large-scale production and use. However, in Example 2, although the amount of yttrium is reduced relative to that in Example 1, which is beneficial to improving low-temperature impact toughness and reducing production costs, the poor hardness level is not conducive to the widespread application of bucket tooth materials.

[0052] As shown in Table 1, by increasing the strontium content, the hardness of the bucket tooth seat material has a small increase, indicating that the role of strontium in refining the structure is conducive to improving the hardness of the bucket tooth material, thereby enhancing the wear resistance of the material. However, when the strontium content is further increased, as the hardness of the bucket tooth seat material increases, the low-temperature impact toughness of the material decreases, and the production cost of the bucket tooth material increases, which is not conducive to the large-scale application of bucket tooth seat materials.

[0053] Referring to Comparative Example 1, it can be seen that no strontium element is added to the bucket tooth seat material, because the strontium element in the material can further refine the grain size, further improve the strength and low-temperature impact toughness, and enhance the performance of the bucket tooth seat material. Therefore, the bucket tooth material in Comparative Example 1 shows poor mechanical properties and performance, which is not conducive to the use of the bucket tooth material.

[0054] The above describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments, and the above embodiments and the specification only describe the principles of the present application. The present application may have various changes and improvements without departing from the spirit and scope of the present application, and these changes and improvements fall within the scope of the present application for which protection is sought. The scope of protection claimed by the present application is defined by the attached claims and their equivalents.

Claims

1. A bucket tooth seat material, characterized in that: The invention comprises the following components in percentage by weight: 0.15% to 0.25% carbon, 0.80% to 1.50% silicon, 0.60% to 1.20% manganese, 0.70% to 1.20% chromium, 0.01% to 0.04% aluminum, less than 0.035% phosphorus, less than 0.035% sulfur, 0.001% to 0.006% boron, 0.02% to 0.18% yttrium and 0.01% to 0.03% strontium, with the remainder being iron and impurities.

2. The bucket tooth seat material according to claim 1, characterized in that: The carbon content is 0.17% to 0.23%, the silicon content is 0.90% to 1.20%, the manganese content is 0.80% to 1.10%, the chromium content is 0.80% to 1.10%, the yttrium content is 0.05% to 0.15%, the strontium content is 0.01% to 0.02%, and the boron content is 0.001% to 0.005%.

3. A method for preparing a bucket tooth seat material, characterized in that: Includes steps: S100, melting the alloy forging raw material to obtain a first raw material; S200, taking the first molten raw material for component analysis, and adjusting the composition of the first raw material to have a carbon content of 0.17% to 0.23%, a silicon content of 0.90% to 1.20%, a manganese content of 0.80% to 1.10%, a chromium content of 0.80% to 1.10%, a phosphorus content of less than 0.035%, and a sulfur content of less than 0.035%, to obtain a second raw material; S300, adding the second raw material into the aluminum-yttrium alloy, the aluminum-strontium alloy and the ferroboron alloy at a first speed, and stirring, to obtain a third raw material; S400, manufacturing a bucket tooth seat material by casting and heat treating the third raw material.

4. The preparation method according to claim 3, characterized in that: The step S400 further includes the steps of: S410, homogenizing the third raw material at a first temperature to cast it into a first gear seat material; S420, keeping the first gear seat material at a second temperature for 15 minutes for quenching and tempering to obtain a second gear seat material; S430, quenching the second gear seat material and cooling it to a third temperature to obtain a third gear seat material; S440, heating the third tooth seat material and keeping it at a fourth temperature for 4 hours to 12 hours, and then cooling it to room temperature in air to obtain a bucket tooth seat material.

5. The preparation method according to claim 3, characterized in that: The yttrium content of the aluminum-yttrium alloy is 5% to 10%, the strontium content of the aluminum-strontium alloy is 5% to 10%, and the boron content of the ferroboron alloy is 20% to 25%.

6. The preparation method according to claim 3, characterized in that: The temperature of the second raw material in the step S300 is 1680° C. to 1800° C., and the first speed is 25 kg / s to 65 kg / s.

7. The preparation method according to claim 4, characterized in that: The first temperature is 850°C to 950°C, the second temperature is 850°C to 950°C, the third temperature is less than or equal to 200°C, and the fourth temperature is 450°C to 550°C.

8. The preparation method according to claim 3, characterized in that: The alloy forging raw material is ZG20CrMnSi alloy.

9. The preparation method according to claim 7, characterized in that: The first temperature is 900°C to 950°C, the second temperature is 850°C to 900°C, and the fourth temperature is 460°C to 530°C.

10. The preparation method according to claim 3, characterized in that: The step S300 further includes the steps of: S310, placing an aluminum-yttrium alloy, an aluminum-strontium alloy and a ferroboron alloy on the bottom of a ladle; S320, adding the second raw material into the bottom of the ladle at a first speed and stirring to obtain a third raw material.

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