A multi-toughness layer metal abrasion-resistant lining plate

Abstract

The utility model relates to the technical field of composite metal plate, concretely relates to a kind of multi-flexibility layer metal wear-resistant lining, including substrate layer, the outside of substrate layer is sequentially provided with transition layer and wear-resistant layer according to from inside to outside, wear-resistant layer is alternately superimposed and is constituted by high-hardness layer and toughness buffer layer, the outermost layer of wear-resistant layer is high-hardness layer;High-hardness layer is high-chromium alloy or tungsten-based hard alloy;Toughness buffer layer is low alloy steel.The utility model designs wear-resistant layer as the structure of high-hardness layer and toughness buffer layer alternately superimposed, impact energy is absorbed using toughness buffer layer, crack formation is reduced under high impact working condition and crack propagation is effectively suppressed, and the wear resistance of multi-flexibility layer metal wear-resistant lining is significantly improved.

Description

Technical Field

[0001] This utility model relates to the field of composite metal plate technology, specifically to a multi-toughness layer metal wear-resistant liner. Background Technology

[0002] Port ore terminals are specialized terminals used for loading, unloading, storing, and transshipping bulk dry cargo such as iron ore, coal, non-ferrous metal ores, and non-metallic ores. They are key logistics nodes connecting mining resources and industrial production. Port ore terminals handle cargo with large particle sizes, high single-load volumes, generally high hardness, and many particles with sharp edges. When grabbing, conveying, and unloading materials using equipment such as grabs, belt conveyors, hoppers, and discharge ports, friction and impact occur at the points of direct contact between the cargo and the equipment, leading to abrasive wear and severely impacting the equipment's lifespan.

[0003] Existing technologies typically extend equipment lifespan by installing wear-resistant liners at points of direct contact between equipment and goods. One type of wear-resistant liner includes a base material and a wear-resistant layer, with a transition layer between them. The base material is made of carbon steel, low-alloy steel, or stainless steel, and serves to absorb impact energy. The wear-resistant layer is a plasma-sprayed coating composed of a mixture of barium titanate, manganese powder, tin dioxide, zinc powder, nickel powder, and iron powder, used to improve the impact resistance and strength of the metal liner. The transition layer is formed by co-diffusion with a co-diffusion agent, acting as a bond between the base material and the wear-resistant layer. Although this type of wear-resistant liner includes a wear-resistant layer, the transition layer formed by co-diffusion with the co-diffusion agent has low bonding strength. Under high-impact conditions, if cracks appear on the surface of the wear-resistant layer due to external impact, these cracks often propagate from the wear-resistant layer surface to the base material layer, potentially leading to the wear-resistant layer detaching. This, in turn, affects the liner's wear resistance, overall durability, and service life. Utility Model Content

[0004] To address the technical problem of poor wear resistance and impact resistance of existing wear-resistant liners under high-impact conditions, this utility model provides a multi-toughness layer metal wear-resistant liner. The wear-resistant layer is designed as an alternating structure of a high-hardness layer and a toughness buffer layer. The toughness buffer layer absorbs impact energy, reducing crack formation and effectively inhibiting crack propagation under high-impact conditions, thus significantly improving the wear resistance of the multi-toughness layer metal wear-resistant liner.

[0005] The technical solution of this utility model is as follows:

[0006] A multi-toughness layer metal wear-resistant liner includes a base layer, a transition layer and a wear-resistant layer are provided on the outer side of the base layer in order from the inside to the outside, and the wear-resistant layer is composed of a high-hardness layer and a toughness buffer layer alternately stacked, with the outermost layer of the wear-resistant layer being a high-hardness layer.

[0007] The high-hardness layer is made of high-chromium alloy or tungsten-based cemented carbide. By mass percentage, the high-chromium alloy contains 24%-26% chromium, while the tungsten-based cemented carbide contains 75%-90% tungsten carbide. High-chromium alloys possess high wear resistance, good impact resistance, and corrosion resistance, effectively resisting wear from ore and extending equipment lifespan. Tungsten-based cemented carbide not only has extremely high hardness and wear resistance but also good thermal stability and high compressive strength, maintaining stable performance under high temperature and high pressure conditions.

[0008] The toughness buffer layer is made of low-alloy steel, which contains chromium, manganese, silicon and molybdenum. By mass percentage, the low-alloy steel contains 0.28%-0.33% carbon, 0.7%-1.2% chromium, 1.0%-1.5% manganese, 0.5%-1.0% silicon and 0.3%-0.6% molybdenum.

[0009] Furthermore, the base layer is made of low-carbon steel, which, by mass percentage, contains 0.14%-0.22% carbon, 0.30%-0.65% manganese, ≤0.045% sulfur, and ≤0.045% phosphorus.

[0010] Furthermore, the transition layer is made of 42CrMo series steel, which, by mass percentage, contains 0.35%-0.40% carbon, 0.80%-1.10% chromium, and 0.15%-0.25% molybdenum.

[0011] Furthermore, the thickness of the high-hardness layer is greater than the thickness of the toughness buffer layer. The thickness of the substrate layer is 5-30 mm, preferably 15 mm; the thickness of the transition layer is 0.5-3 mm, preferably 1.5 mm; the single-layer thickness of the high-hardness layer is 2-5 mm, preferably 4 mm; and the single-layer thickness of the toughness buffer layer is 0.5-1.5 mm, preferably 1 mm.

[0012] Furthermore, the thickness ratio of the high-hardness layer to the toughness buffer layer is 3:1-5:1, preferably 4:1. Controlling this ratio within 3:1-5:1 helps balance the wear resistance of the high-hardness layer with the impact energy absorption characteristics of the toughness buffer layer, ensuring the long-term stable use of the multi-toughness layer metal wear-resistant liner in high-wear environments. Under normal operating conditions with moderate impact, a ratio of 3:1-4:1 is suitable for applications such as hoppers for port ship unloaders and conveyor belt chutes. Under high-impact conditions, a ratio of 4:1-5:1 is suitable for ore crushers, prioritizing wear resistance in high-impact environments.

[0013] Furthermore, the high-hardness layer and the toughness buffer layer are alternately stacked at least three times. When the high-hardness layer is located as the innermost layer of the wear-resistant layer, the number of toughness buffer layers equals the number of alternating stacking times, and the number of high-hardness layers equals the number of alternating stacking times plus one. When the toughness buffer layer is located as the innermost layer of the wear-resistant layer, the number of toughness buffer layers equals the number of alternating stacking times, and the number of high-hardness layers equals the number of alternating stacking times. When the high-hardness layer and the toughness buffer layer are alternately stacked five to seven times, stress concentration can be effectively dispersed and crack propagation paths can be extended, meeting the usage requirements of high-demand scenarios such as mining equipment. When the high-hardness layer and the toughness buffer layer are alternately stacked four to six times, a balance between process cost and performance can be achieved. By alternately stacking the high-hardness layer and the toughness buffer layer, effective mechanical load transfer and impact energy buffering are achieved through the synergistic effect between different layers. The alternating layers of high-hardness and toughness buffer layers not only significantly improve the overall durability of the multi-toughness layer metal wear-resistant liner, but also enable it to maintain excellent wear resistance and impact resistance when facing strong impacts and abrasions, thus avoiding brittle fracture.

[0014] Furthermore, adjacent substrate layers and transition layers, adjacent transition layers and high-hardness layers or toughness buffer layers, and adjacent high-hardness layers and toughness buffer layers are all connected by metallurgical bonding. On the one hand, metallurgical bonding ensures that there are no interface defects between the layers, guaranteeing sufficient integrity and stability of the wear-resistant layer. On the other hand, metallurgical bonding allows for a strong bond between the high-hardness layer and the toughness buffer layer, avoiding the seam problems that may arise from traditional mechanical bonding methods.

[0015] Furthermore, metallurgical bonding is achieved through laser melting deposition, vapor deposition, or welding. Laser melting deposition utilizes a high-energy laser beam to melt metal powder or wire, allowing it to achieve high-precision interlayer bonding by depositing it layer by layer on adjacent inner surface. Automated welding is preferred for welding.

[0016] The beneficial effects of this utility model are as follows:

[0017] This invention provides a multi-layer toughness metal wear-resistant liner. A transition layer and a wear-resistant layer are sequentially arranged from the inside out on the outer side of the substrate layer. The transition layer mitigates the difference in thermal expansion coefficients between the substrate and wear-resistant layers, enhances the interlayer bonding strength, alleviates interfacial stress, and inhibits crack initiation and propagation. The outermost high-hardness layer of the wear-resistant layer withstands external wear, reducing the wear rate. Alternating toughness buffer layers within the wear-resistant layer absorb impact energy and inhibit crack propagation. Stress is dispersed through plastic deformation, preventing brittle fracture failure of a single high-hardness layer. The alternating structure of high-hardness and toughness buffer layers also facilitates the uniform transfer of concentrated stress towards the substrate layer, reducing peak interfacial stress and extending the overall structural lifespan. Because the toughness buffer layer dissipates crack propagation energy during plastic deformation, when cracks appear in the high-hardness layer under wear or impact, the cracks deflect, branch, or terminate in the toughness buffer layer, thus extending the crack propagation path and significantly improving the wear resistance of the multi-layer toughness metal wear-resistant liner. Attached Figure Description

[0018] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of the multi-toughness layer metal wear-resistant liner in Example 1.

[0020] Figure 2 The bar graphs are wear loss weights of the multi-toughness layer metal wear-resistant liners in Examples 1 and 2 and the conventional wear-resistant liner in Comparative Example 1 under different loads, where a, b, and c represent the multi-toughness layer metal wear-resistant liner in Example 1, the multi-toughness layer metal wear-resistant liner in Example 2, and the conventional wear-resistant liner in Comparative Example 1, respectively.

[0021] In the figure, 1-substrate layer, 2-transition layer, 3-wear-resistant layer, 31-toughness buffer layer, 32-high hardness layer. Detailed Implementation

[0022] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0023] Example 1

[0024] A multi-layer tough metal wear-resistant liner, such as Figure 1 As shown, the system includes a base layer 1, which is made of low-carbon steel. By mass percentage, the low-carbon steel contains 0.14%-0.22% carbon, 0.30%-0.65% manganese, ≤0.045% sulfur, and ≤0.045% phosphorus. The thickness of the base layer 1 is 15mm. The outer surface of the base layer 1 is connected to the inner surface of the transition layer 2 via a metallurgical bond. The transition layer 2 is made of 42CrMo series steel, containing 0.35%~0.40% carbon, 0.80%~1.10% chromium, and 0.15%~0.25% molybdenum. The thickness of the transition layer 2 is 1.5mm. The outer surface of the transition layer 2 is connected to the inner surface of the wear-resistant layer 3 via a metallurgical bond. The wear-resistant layer 3 consists of alternating high-hardness layers 32 and toughness buffer layers 31, with adjacent high-hardness layers 32 and toughness buffer layers 31 connected via a metallurgical bond. In the wear-resistant layer 3, there are four high-hardness layers 32 and three toughness buffer layers 31. The innermost and outermost layers of the wear-resistant layer 3 are both high-hardness layers 32. The high-hardness layers 32 are made of high-chromium alloy. By mass percentage, the high-chromium alloy contains 24%-26% chromium, 2.8%-3.2% carbon, 1.5%-2.5% molybdenum, and 0.3%-0.5% vanadium. The thickness of each high-hardness layer 32 is 4mm. The toughness buffer layer is made of low-alloy steel. By mass percentage, the low-alloy steel contains 0.28%-0.33% carbon, 0.7%-1.2% chromium, 1.0%-1.5% manganese, 0.5%-1.0% silicon, and 0.3%-0.6% molybdenum. The thickness of each toughness buffer layer 31 is 1mm.

[0025] Metallurgical bonding is achieved through automated welding. The process parameters for automated welding are as follows: welding current 250-400A, welding voltage 28-32V, preheating temperature of the inner substrate material between adjacent layers 150-200℃, and interlayer temperature ≤300℃. The welding speed is 400-600mm / min, and the wire feed rate is matched to the welding current to ensure uniform thickness of each layer in the wear-resistant layer. Post-heat preservation: hold at 200-250℃ for 2 hours.

[0026] Example 2

[0027] A multi-layered toughness metal wear-resistant liner includes a base layer made of low-carbon steel. By mass percentage, the low-carbon steel contains 0.14%-0.22% carbon, 0.30%-0.65% manganese, ≤0.045% sulfur, and ≤0.045% phosphorus. The base layer is 25mm thick. The outer surface of the base layer is metallurgically bonded to the inner surface of a transition layer. The transition layer is made of 42CrMo series steel, containing 0.35%-0.40% carbon, 0.80%-1.10% chromium, and 0.15%-0.25% molybdenum. The transition layer is 3mm thick. The outer surface of the transition layer is metallurgically bonded to the inner surface of the wear-resistant layer. The wear-resistant layer consists of alternating high-hardness layers and toughness buffer layers, with adjacent high-hardness layers and toughness buffer layers connected by metallurgical bonds. The wear-resistant layer consists of three high-hardness layers and three toughness buffer layers. The innermost layer of the wear-resistant layer is the toughness buffer layer, and the outermost layer is the high-hardness layer. The high-hardness layers are made of tungsten-based cemented carbide, containing 75%-90% tungsten carbide, 5%-15% molybdenum carbide, 5%-10% cobalt, and 0%-10% titanium carbide by mass. Each high-hardness layer has a thickness of 5mm. The toughness buffer layers are made of low-alloy steel, containing 0.28%-0.33% carbon, 0.7%-1.2% chromium, 1.0%-1.5% manganese, 0.5%-1.0% silicon, and 0.3%-0.6% molybdenum by mass. Each toughness buffer layer has a thickness of 1.5mm.

[0028] Metallurgical bonding is achieved through automated welding. The process parameters for automated welding are as follows: welding current 250-400A, welding voltage 28-32V, preheating temperature of the inner substrate material between adjacent layers 150-200℃, and interlayer temperature ≤300℃. The welding speed is 400-600mm / min, and the wire feed rate is matched to the welding current to ensure uniform thickness of each layer in the wear-resistant layer. Post-heat preservation: hold at 200-250℃ for 2 hours.

[0029] Comparative Example 1

[0030] Comparative Example 1 is a traditional wear-resistant liner, comprising a base layer, with a transition layer and a wear-resistant layer sequentially arranged from the inside out on the outer side of the base layer. The base layer is made of low-carbon steel, with a carbon content of 0.14%-0.22%, a manganese content of 0.30%-0.65%, a sulfur content ≤0.045%, and a phosphorus content ≤0.045% by mass percentage. The thickness of the base layer is 20 mm. The outer surface of the base layer is metallurgically bonded to the inner surface of the transition layer. The transition layer is made of 42CrMo series steel, with a carbon content of 0.35%-0.40%, a chromium content of 0.80%-1.10%, and a molybdenum content of 0.15%-0.25%. The thickness of the transition layer is 2 mm. The outer surface of the transition layer is connected to the inner surface of the wear-resistant layer by metallurgical bonding. The wear-resistant layer is a tungsten-based cemented carbide. By mass percentage, the tungsten-based cemented carbide contains 75%-90% tungsten carbide, 5%-15% molybdenum carbide, 5%-10% cobalt, and 0%-10% titanium carbide. The thickness of the wear-resistant layer is 30mm.

[0031] Metallurgical bonding is achieved through automated welding. The process parameters for automated welding are as follows: welding current 250-400A, welding voltage 28-32V, preheating temperature of the inner substrate material between adjacent layers 150-200℃, and interlayer temperature ≤300℃. Welding speed is 400-600mm / min, and the wire feed rate is matched to the welding current to ensure uniform wear-resistant layer thickness. Post-heat preservation: hold at 200-250℃ for 2 hours.

[0032] Friction and wear tests were conducted on the multi-layered tough metal wear-resistant liner in Example 1, the multi-layered tough metal wear-resistant liner in Example 2, and the conventional wear-resistant liner in Comparative Example 1. After the tests, the surface microstructure of the multi-layered tough metal wear-resistant liner in Example 1, the multi-layered tough metal wear-resistant liner in Example 2, and the conventional wear-resistant liner in Comparative Example 1 was observed using a scanning electron microscope. The multi-layered tough metal wear-resistant liner in Example 1 and the multi-layered tough metal wear-resistant liner in Example 2 had fewer surface cracks and spalling, while the conventional wear-resistant liner in Comparative Example 1 had obvious surface cracks and spalling. The number of surface cracks and the degree of fracture of the multi-layered tough metal wear-resistant liner in Example 1 and Example 2 were better than those of the conventional wear-resistant liner in Comparative Example 1 after friction and wear.

[0033] Wear loss was tested under different loads on the multi-layered toughness metal wear-resistant liner in Example 1, the multi-layered toughness metal wear-resistant liner in Example 2, and the conventional wear-resistant liner in Comparative Example 1. The test results are as follows: Figure 2 As shown. By Figure 2 It can be seen that, under different loads, the wear loss weight of the multi-toughness layer metal wear-resistant liners in Examples 1 and 2 is less than that of the conventional wear-resistant liner in Comparative Example 1.

[0034] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A multi-layer toughness metal wear-resistant liner, comprising a substrate layer, characterized in that, The outer side of the substrate layer is provided with a transition layer and a wear-resistant layer in order from the inside to the outside. The wear-resistant layer is composed of alternating layers of high hardness layer and toughness buffer layer, with the outermost layer of the wear-resistant layer being a high hardness layer. The high-hardness layer is made of high-chromium alloy or tungsten-based hard alloy; The toughness buffer layer is made of low alloy steel.

2. The multi-layer toughness metal wear-resistant liner as described in claim 1, characterized in that, The substrate layer is made of low-carbon steel.

3. The multi-toughness layer metal wear-resistant liner as described in claim 1, characterized in that, The transition layer is made of 42CrMo series steel.

4. A multi-layer toughness metal wear-resistant liner as described in any one of claims 1-3, characterized in that, The thickness of the high-hardness layer is greater than the thickness of the toughness buffer layer.

5. The multi-toughness layer metal wear-resistant liner as described in claim 4, characterized in that, The ratio of the thickness of the high-hardness layer to the thickness of the toughness buffer layer is 3:1-5:

1.

6. The multi-layer toughness metal wear-resistant liner as described in claim 1, characterized in that, The high-hardness layer and the toughness buffer layer are alternately layered no less than three times.

7. The multi-layer toughness metal wear-resistant liner as described in claim 1, characterized in that, Adjacent substrate layers and transition layers, adjacent transition layers and high-hardness layers or toughness buffer layers, and adjacent high-hardness layers and toughness buffer layers are all connected by metallurgical bonding.

8. The multi-toughness layer metal wear-resistant liner as described in claim 7, characterized in that, Metallurgical bonding is achieved through laser melting deposition, vapor deposition, or welding.

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