A kind of material for bucket tooth seat and its preparation method

Abstract

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

Description

Technical Field

[0001] This application relates to the field of alloy technology, and particularly to a material for a bucket tooth seat and a preparation method thereof. Background Art

[0002] Bucket teeth are important wear-resistant components used in construction machinery such as excavators and bulldozers. Currently, large bucket teeth usually adopt a combined design and consist of two parts: a tooth seat material and a tooth seat. Among them, the tooth seat material is the component directly in contact with the material and needs to have good wear resistance and the characteristic of not being easily broken under high impact loads. The tooth seat is a component with one end welded to the bucket and the other end connected to the tooth seat material through a pin shaft. Through this design, the tooth seat not only has to withstand the erosion wear from the material but also transfer the bending and impact loads from the tooth seat material. Therefore, the bucket tooth seat material is required to have a certain wear resistance, good welding performance, and comprehensive mechanical properties. However, since the wall thickness of the tooth seat may exceed 120 millimeters, it is easy to have a phenomenon that due to poor hardenability, it is difficult to obtain ideal comprehensive properties inside the tooth seat material. But with the use of bucket tooth materials in various scenarios, it poses a severe challenge to the complex performance requirements of bucket tooth materials.

[0003] Currently, when applied to large bucket teeth, it is difficult to harden the thick and large parts of the tooth seat, and there is a large difference in hardness between the surface and the core, resulting in poor wear resistance; in addition, its low-temperature toughness is low, and it is easy to break under alpine environments and high-impact working conditions, with a fracture ratio as high as 3% - 5%, causing huge losses. Therefore, the bucket tooth seat material and the preparation method thereof urgently need to be improved to adapt to a wide range of application environments. Summary of the Invention

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

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

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

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

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

[0009] According to another aspect of this application, a preparation method for a material of a bucket tooth socket is also provided, including the steps:

[0010] S100, melting alloy forging raw materials to obtain a first raw material;

[0011] S200, taking the melted first raw material for component analysis and adjusting the components of the first raw material so that the content of carbon is 0.17% - 0.23%, the content of silicon is 0.90% - 1.20%, the content of manganese is 0.80% - 1.10%, the content of chromium is 0.80% - 1.10%, the content of phosphorus is less than 0.035%, and the content of sulfur is less than 0.035% to obtain a second raw material;

[0012] S300, adding the second raw material to aluminum yttrium alloy, aluminum strontium alloy, and ferroboron alloy at a first speed and stirring to obtain a third raw material;

[0013] S400, casting and heat - treating the third raw material to obtain the material for the bucket tooth socket.

[0014] In one embodiment, the step S400 further includes the steps of:

[0015] S410, homogenizing the third raw material at a first temperature and casting it into the first socket material;

[0016] S420, holding the first socket material at a second temperature for 15 min and performing quenching and tempering treatment to obtain the second socket material;

[0017] S430, quenching the second socket material and cooling it to a third temperature to obtain the third socket material;

[0018] S440, heating up the third socket material, holding it at a fourth temperature for 4 h to 12 h, and then cooling it to room temperature in the air to obtain the bucket tooth socket material.

[0019] In one embodiment, the content of yttrium in the aluminum yttrium alloy is 5% to 10%, the content of strontium in the aluminum strontium alloy is 5% to 10%, and the content of boron in the ferroboron alloy is 20% to 25%.

[0020] In one embodiment, 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.

[0021] 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.

[0022] In one embodiment, the alloy forging raw material is selected as ZG20CrMnSi alloy.

[0023] 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.

[0024] In one embodiment, the step S300 further includes the steps of:

[0025] S310, placing the aluminum yttrium alloy, aluminum strontium alloy, and ferroboron alloy at the bottom of the ladle;

[0026] S320, adding the second raw material to the bottom of the ladle at the first speed and stirring to obtain the third raw material.

[0027] Compared with the prior art, the beneficial effects of the present application are as follows:

[0028] (1)A kind of material for bucket tooth seat and its preparation method provided by the present invention, by optimizing the proportion of each chemical component in the material for bucket tooth seat, a material for bucket tooth seat with good mechanical properties and welding performance is obtained, and it is applicable to a variety of application scenarios.

[0029] (2)A kind of material for bucket tooth seat and its preparation method provided by the present invention, by optimizing the preparation process in the preparation process, while improving the service performance of the tooth seat material, the production cost is reduced. Specific embodiments

[0030] Below, in combination with specific embodiments, the present application will be further described. It should be noted that, on the premise of no conflict, any combination of the following described embodiments or technical features can form a new embodiment.

[0031] As used herein, the term "prepared from..." is synonymous with "comprising". The terms "comprising", "including", "having", "containing" or any other variation thereof used herein are intended to cover non-exclusive inclusion. For example, a composition, step, method, article or apparatus containing the listed elements is not necessarily limited to those elements, but may include other elements not explicitly listed or elements inherent to such composition, step, method, article or apparatus.

[0032] When an equivalent, concentration or parameter is expressed as a range, a preferred range, or a range defined by a series of upper preferred values and lower preferred values, this should be understood to specifically disclose the range 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 separately disclosed. For example, when the range is disclosed as "1 to 5", the described range should be interpreted to include ranges "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 herein, unless otherwise stated, the range includes its end values and all integers and fractions within the range.

[0033] 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 a modified part that is close to the quantity and acceptable without causing a change in the relevant basic functions. Correspondingly, modifying a numerical value with "about", "approximately", etc. means that the present invention is not limited to the exact numerical value. In some examples, the approximate term may correspond to the accuracy of the instrument for measuring the numerical value. In the specification and claims of the present application, range limitations can be combined and / or interchanged, and if not otherwise stated, these ranges include all sub-ranges contained therein.

[0034] According to one aspect of the present invention, a material for a bucket tooth socket comprises the following components by weight percentage: the carbon content is 0.15% - 0.25%, the silicon content is 0.80% - 1.50%, the manganese content is 0.60% - 1.20%, the chromium content is 0.70% - 1.20%, the aluminum content is 0.01% - 0.04%, the phosphorus content is less than 0.035%, the sulfur content is less than 0.035%, the boron content is 0.001% - 0.006%, the yttrium content is 0.02% - 0.18%, and the strontium content is 0.01% - 0.03%, with the balance being iron and impurities.

[0035] In this application, by optimizing the ratio of each chemical component in the material for the bucket tooth socket, a material for the bucket tooth socket with good mechanical properties, welding properties, and service performance is obtained, and it is applicable to a variety of application scenarios. Specifically, by adding yttrium element, the grain size inside the alloy can be refined, thereby improving the mechanical properties and corrosion resistance of the material. The yttrium element can also stabilize the dislocation substructure and strengthen the grain boundary, thereby significantly extending the creep life of the material for the bucket tooth socket and further improving its application performance. At the same time, the added strontium element further improves the impact toughness of the material for the bucket tooth socket under the action of the yttrium element that has refined the grains, which helps to enhance the service performance of the material for the bucket tooth socket. Further, by adding boron element, the hardenability of the material for the bucket tooth socket can be further improved, enhancing its mechanical properties and wear resistance, thereby improving the overall service performance of the material for the bucket tooth socket. In terms of production, in this application, expensive metal elements such as nickel element or molybdenum element are not used when preparing the material for the bucket tooth socket, thereby reducing production costs and optimizing the production process, and further increasing the market competitiveness of the material for the bucket tooth socket.

[0036] In one embodiment, the carbon content is 0.17% - 0.23%, the silicon content is 0.90% - 1.20%, the manganese content is 0.80% - 1.10%, the chromium content is 0.80% - 1.10%, the yttrium content is 0.05% - 0.15%, the strontium content is 0.01% - 0.02%, and the boron content is 0.001% - 0.005%. By adjusting the content of each component in the material for the bucket tooth socket, the service performance, mechanical strength, and welding performance of the material are improved, and the service life of the material is further extended.

[0037] According to another aspect of the present invention, a preparation method for a material for a bucket tooth socket comprises the steps:

[0038] S100, melting alloy forging raw materials to obtain a first raw material;

[0039] S200, conduct a composition analysis on the first raw material in the molten state, and adjust the composition of the first raw material so that the carbon content is 0.17% - 0.23%, the silicon content is 0.90% - 1.20%, the manganese content is 0.80% - 1.10%, the chromium content is 0.80% - 1.10%, the phosphorus content is less than 0.035%, and the sulfur content is less than 0.035% to obtain the second raw material;

[0040] S300, add the second raw material to aluminum-yttrium alloy, aluminum-strontium alloy, and ferro-boron alloy at a first speed and stir to obtain the third raw material;

[0041] S400, obtain the bucket tooth seat material through casting and heat treatment of the third raw material.

[0042] Through a preparation method provided by this application, a bucket tooth seat material with good mechanical properties and service performance can be prepared relatively simply. The prepared bucket tooth seat material can be widely used in a variety of application scenarios, having good market competitiveness and potential for application. On the other hand, this preparation method can also be applicable to the preparation of large bucket tooth seat material components with a single weight of 300 kg or more, further meeting the requirements of various forming methods such as sand core casting, permanent mold casting, liquid die forging, and solid-state hot die forging, and having wide applicability and flexibility.

[0043] In one embodiment, the step S400 further includes the steps of:

[0044] S410, conduct homogenization treatment on the third raw material at a first temperature and cast it into the first seat material;

[0045] S420, keep the first seat material at a second temperature for 15 min to obtain the second seat material;

[0046] S430, conduct quenching treatment on the second seat material and cool it to a third temperature to obtain the third seat material;

[0047] S440, heat up the third seat material and keep it at a fourth temperature for 4 h - 12 h, and then cool it to room temperature in the air to obtain the bucket tooth seat material.

[0048] In step S410 of the preparation method, homogenization treatment can effectively eliminate the internal stress and non-uniformity of the structure in the forging of the bucket tooth seat material, and further refine the internal grains of the bucket tooth seat material. This helps to improve the overall performance of the bucket tooth seat material, and reduces the risk of cracks and deformation in the forging during subsequent processing, thereby prolonging the service life of the bucket tooth material and enhancing the market competitiveness. On the other hand, in step S430, quenching treatment significantly improves the hardness and mechanical properties of the bucket tooth seat material, and increases a certain amount of toughness and wear resistance. Quenching treatment also optimizes the internal stress distribution of the material, improves the fatigue resistance and fracture resistance, thereby enhancing the service performance. The low-temperature tempering treatment introduced after quenching treatment in step S440 helps to eliminate the stress generated during quenching, prevent grinding and crack phenomena, 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 formed oxide skin further enhances the corrosion resistance of the bucket tooth seat material and reduces the surface roughness, thereby improving the comprehensive performance of the material.

[0049] In one embodiment, the content of yttrium in the aluminum-yttrium alloy is 5% - 10%. Specifically, the content of yttrium in the aluminum-yttrium alloy is 5%, 6%, 7%, 8%, 9% and 10%. In other words, yttrium is an effective grain refiner, which can significantly reduce the grain size in the aluminum alloy, thereby enhancing the strength and hardness of the material. In other words, the aluminum-yttrium alloy combines the light weight characteristics of aluminum and the strengthening effect of yttrium, enabling it to have higher mechanical strength and wear resistance while maintaining a lower density.

[0050] In one embodiment, the content of strontium in the aluminum-strontium alloy is 5% - 10%. Specifically, the content of strontium in the aluminum-strontium alloy is 5%, 6%, 7%, 8%, 9% and 10%. It can be understood that the addition of strontium element 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 beneficial to the design and manufacture of the bucket tooth material. 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 increasing the service life and working efficiency of the bucket tooth.

[0051] In one embodiment, the boron content in the ferroboron alloy is 20% - 25%. Specifically, the boron content in the ferroboron alloy is 20%, 21%, 22%, 23%, 24% and 25%. By adding boron element, the hardenability of the bucket tooth seat material can be significantly improved. With the enhancement of hardenability, during the quenching process, a more uniform martensite structure can be formed inside the bucket tooth forging, thereby further enhancing the wear resistance, hardness and mechanical strength of the bucket tooth material. In other words, as the quenching temperature increases, both the hardness and tensile strength of the bucket tooth material show an upward trend. This is because austenitization is more complete at high temperatures, and the alloying elements are more evenly distributed, thus increasing the stability of supercooled austenite. In addition, the bucket tooth material with higher hardenability can obtain better impact toughness and elongation after quenching treatment, thereby extending the service life.

[0052] In one embodiment, the temperature of the second raw material in step S300 is 1680°C - 1800°C. Specifically, the temperature of the second raw material 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. Further preferably, the temperature of the second raw material is 1700°C - 1730°C. By melting the raw materials at high temperatures, impurities therein can be effectively removed, thereby improving the purity of the material. On the one hand, the 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 temperatures has good hardenability, which enables a more uniform martensite structure to be formed during the quenching process, thereby significantly enhancing the wear resistance, hardness and mechanical strength of the bucket tooth seat material. In addition, a more uniform oxide film structure will be generated on the surface of the alloy material after high-temperature melting treatment, further enhancing the wear resistance and corrosion resistance of the material, making it suitable for various application environments.

[0053] In one embodiment, the first speed is 25 kg / s - 65 kg / s. Specifically, the first speed is 25 kg / s, 30 kg / s, 35 kg / s, 40 kg / s, 45 kg / s, 50 kg / s, 55 kg / s, 60 kg / s and 65 kg / 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. By appropriate ladle speed, production efficiency can be improved. When the ladle speed is too high, it may cause the temperature of the molten metal to drop rapidly, affecting fluidity, thereby increasing the risk of defects in the bucket tooth seat forging. On the other hand, when the ladle speed is too slow, it may cause uneven cooling speed of the bucket tooth seat forging, affecting the mechanical properties and service performance of the final product.

[0054] 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, 950°C. Among them, through homogenization treatment, the internal tissue structure and performance of the bucket tooth material can be improved, the crystal structure inside the alloy can be improved, the casting stress can be further eliminated, and the overall performance of the bucket tooth material can be enhanced. It can be understood that when the homogenization treatment temperature is too high, overburning of the bucket tooth material may occur. Once overburning occurs, the bucket tooth material must be scrapped in its entirety and remelted, resulting in huge economic losses. Therefore, selecting an appropriate homogenization treatment temperature is crucial for avoiding overburning and maintaining material performance.

[0055] 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 bucket tooth seat material is heated above the critical temperature to reach the austenite region, enabling carbon to dissolve into the iron matrix to form a uniform austenite structure.

[0056] In one embodiment, the third temperature is less than or equal to 200°C. Through quenching treatment, which is a process of rapidly cooling the material after heating it above the critical temperature, this causes the material structure to transform into martensite, thereby significantly enhancing hardness and wear resistance. When the quenching temperature is low, due to uneven austenitization or the presence of more ferrite inside the bucket tooth material, the impact toughness of the bucket tooth material is reduced, thereby decreasing the stability of the material during use. When the quenching temperature is too high, due to the phenomenon of coarse austenite grains during heating, the martensite obtained after quenching treatment also becomes coarse, thus reducing the impact toughness of the bucket tooth material.

[0057] 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 being hard and wear-resistant, it has the advantages of high strength and excellent fatigue resistance during use, which is beneficial to improving the service life of the bucket tooth material. The 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, since it causes the stability of the tempered martensite to decrease, the impact toughness, strength, and wear resistance of the bucket tooth material are further reduced. On the other hand, too high a tempering temperature may increase the tendency of the bucket tooth material to deform and crack during heat treatment, 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 service performance of the bucket tooth material.

[0058] In one embodiment, the alloy forging raw material is selected as ZG20CrMnSi alloy. Among them, the ZG20CrMnSi alloy has a low carbon content, and materials with a low carbon content usually have better welding performance. Further, due to the chromium element inside the bucket tooth seat material, it can improve the yield limit, impact toughness, and wear resistance of the material, while reducing the tendency of hot cracking and enhancing the service performance of the bucket tooth seat material.

[0059] 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 appropriate processing temperatures in heat treatment is beneficial to improving the service performance and service life of the bucket tooth seat material, and further enhancing the market competitiveness of the bucket tooth seat material.

[0060] In one embodiment, the step S300 further includes the steps of:

[0061] S310, placing the aluminum-yttrium alloy, aluminum-strontium alloy, and ferro-boron alloy at the bottom of the ladle;

[0062] S320, adding the second raw material to the bottom of the ladle at a first speed and stirring to obtain a third raw material.

[0063] Through this process, not only can the mechanical hardness and wear resistance of the bucket tooth seat material be improved, but also its impact resistance and impact toughness can be enhanced, 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.

[0064] Example 1

[0065] A material for a bucket tooth socket, comprising the following components by weight percentage: the carbon content is 0.20%, the silicon content is 1.00%, the manganese content is 0.90%, the chromium content is 1.00%, the aluminum content is 0.02%, the phosphorus content is 0.010%, the sulfur content is 0.010%, the boron content is 0.004%, the yttrium content is 0.10%, the strontium content is 0.015%, and the balance is iron and impurities.

[0066] Example 2

[0067] The difference between Example 2 and Example 1 is that the yttrium content is 0.06%.

[0068] Example 3

[0069] The difference between Example 3 and Example 1 is that the yttrium content is 0.13%.

[0070] Example 4

[0071] The difference between Example 4 and Example 1 is that the strontium content is 0.010%.

[0072] Example 5

[0073] The difference between Example 5 and Example 1 is that the strontium content is 0.020%.

[0074] Comparative Example 1

[0075] A material for a bucket tooth socket, comprising the following components by weight percentage: the carbon content is 0.20%, the silicon content is 1.00%, the manganese content is 0.90%, the chromium content is 1.00%, the aluminum content is 0.02%, the phosphorus content is 0.010%, the sulfur content is 0.010%, the boron content is 0.004%, the yttrium content is 0.10%, and the balance is iron and impurities.

[0076] Performance evaluation

[0077] The bucket tooth socket 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.

[0078] Table 1: Performance tests of bucket tooth socket materials

[0079]

[0080] 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 yttrium improves the hardness inside the material by refining the grains and other effects, thereby enhancing its wear resistance. However, at this time, the impact toughness of the bucket tooth seat material in Example 3 at low temperature is poor, which is not conducive to the actual application of the bucket tooth material. On the other hand, due to the high price of yttrium, as the yttrium content increases, the production cost of the bucket tooth material also rises, which limits its large-scale production and use. But in Example 2, by reducing the dosage of yttrium compared with Example 1, although it is beneficial to improve the low-temperature impact toughness and reduce the production cost, the poor hardness level is not conducive to the wide application of the bucket tooth material.

[0081] As shown in Table 1, by increasing the content of strontium, there is a slight increase in the hardness of the bucket tooth seat material, indicating that the role of strontium in refining the structure is beneficial to improving the hardness of the bucket tooth material, thereby enhancing the wear resistance of the material. However, when the content of strontium element 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 accordingly, which is not conducive to the large-scale application of the bucket tooth seat material.

[0082] Referring to Comparative Example 1, no strontium element is added to the bucket tooth seat material. Since strontium element can play a role in further refining the grain size in the material, it further improves the strength and low-temperature impact toughness, and enhances the service performance of the bucket tooth seat material. Therefore, the bucket tooth material in Comparative Example 1 shows poor mechanical properties and service performance, which is not conducive to the use of the bucket tooth material.

[0083] The above describes the basic principle, 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. What is described in the above embodiments and the specification is only the principle of the present application. Without departing from the spirit and scope of the present application, the present application will have various changes and improvements, and these changes and improvements all fall within the scope of the present application claimed. The scope of protection required by the present application is defined by the appended claims and their equivalents.

Claims

1. A material for a bucket tooth seat, characterized in that, It includes the following components by weight percentage: the carbon content is 0.17% - 0.23%, the silicon content is 0.90% - 1.20%, the manganese content is 0.80% - 1.10%, the chromium content is 0.80% - 1.10%, the aluminum content is 0.01% - 0.04%, the phosphorus content is less than 0.035%, the sulfur content is less than 0.035%, the boron content is 0.001% - 0.004%, the yttrium content is 0.06% - 0.12%, and the strontium content is 0.01% - 0.015%, with the balance being iron and impurities; and The preparation method of the bucket tooth seat material includes the steps: S100, melting alloy forging raw materials to obtain the first raw material; S200, taking the melted first raw material for composition analysis and adjusting the composition of the first raw material so that the carbon content is 0.17% - 0.23%, the silicon content is 0.90% - 1.20%, the manganese content is 0.80% - 1.10%, the chromium content is 0.80% - 1.10%, the phosphorus content is less than 0.035%, and the sulfur content is less than 0.035% to obtain the second raw material; S300, adding the second raw material to aluminum yttrium alloy, aluminum strontium alloy and ferroboron alloy at the first speed and stirring to obtain the third raw material; S400, obtaining the bucket tooth seat material through casting and heat treatment of the third raw material; and The step S400 further includes the steps: S410, after casting the third raw material, performing homogenization treatment at the first temperature to obtain the first tooth seat material; S420, holding the first tooth seat material at the second temperature for 15 minutes and performing quenching and tempering treatment to obtain the second tooth seat material; S430, performing quenching treatment on the second tooth seat material and cooling it to the third temperature to obtain the third tooth seat material; S440, heating the third tooth seat material and holding it at the fourth temperature for 4h - 12h, and then cooling it to room temperature in the air to obtain the bucket tooth seat material; and The first temperature is 850°C - 950°C, the second temperature is 850°C - 950°C, the third temperature is less than or equal to 200°C, the fourth temperature is 450°C - 550°C, and the alloy forging raw material is ZG20CrMnSi alloy.

2. The material of the bucket tooth seat according to claim 1, characterized in that The yttrium content in the aluminum yttrium alloy is 5% - 10%, the strontium content in the aluminum strontium alloy is 5% - 10%, and the boron content in the ferroboron alloy is 20% - 25%.

3. The material of the bucket tooth seat according to claim 1, characterized in that, The temperature of the second raw material in the step S300 is 1680°C - 1800°C, and the first speed is 25kg / s - 65kg / s.

4. The material of the bucket tooth seat according to claim 1, characterized in that, The first temperature is 900°C - 950°C, the second temperature is 850°C - 900°C, and the fourth temperature is 460°C - 530°C.

5. The material of the bucket tooth socket according to claim 1, characterized in that, The step S300 further includes the steps: S310, placing the aluminum yttrium alloy, aluminum strontium alloy and ferroboron alloy at the bottom of the pouring ladle; S320, adding the second raw material to the bottom of the pouring ladle at the first speed and stirring to obtain the third raw material.

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