Wear-resistant plates have crucial and extensive applications in the construction machinery industry. The following is a detailed introduction:

I. Applications in excavators

1. Bucket:

    - Bucket body: When the excavator bucket is used to excavate various materials (such as soil, sand, gravel, ore, etc.), it comes into direct contact with the materials and undergoes frequent friction and collision. Wear-resistant plates are widely used to manufacture the bottom plate, side plates, and cutting edge of the bucket. For example, using high-hardness wear-resistant plates such as NM400 or NM500 to make the bottom plate can effectively resist the wear during material excavation and unloading, extending the service life of the bucket. For the side plates, the wear-resistant plates can prevent scratching by the excavated materials and maintain the structural integrity of the bucket. At the cutting edge, the use of wear-resistant plates, with their high wear resistance and good toughness, can ensure that the cutting edge is not prone to chipping or curling when forcefully cutting into the materials, maintaining efficient excavation capacity.

    - Bucket teeth: Bucket teeth are one of the most easily worn parts on the excavator bucket, which need to withstand huge impact forces and intense friction with hard materials. Some bucket teeth are made of special wear-resistant plate materials such as wear-resistant alloy steels, or wear-resistant materials are surfacing welded on their surfaces to form a wear-resistant layer, enhancing the wear resistance of the bucket teeth, reducing the downtime and increased costs caused by frequent replacement of bucket teeth, and ensuring the continuous and stable excavation operation of the excavator.

2. Small arm and large arm:

    - Although the small arm and large arm are not the main wear parts in direct contact with the materials, during the excavation process, they will withstand the alternating stresses transmitted from the bucket and possible slight friction and collision with surrounding environmental objects. Some construction machinery manufacturers use wear-resistant plates to reinforce the key vulnerable parts of the small arm and large arm (such as connection parts, ends cooperating with the bucket, etc.), enhancing the wear resistance and impact resistance of these parts, ensuring the stability and reliability of the overall structure of the excavator, and extending its service life.

II. Applications in loaders

1. Bucket:

    - The loader bucket is mainly used for shoveling and transporting materials. When loading and unloading bulk materials such as sand, gravel, and coal, the wear of the bucket is very serious. Wear-resistant plates are widely used in various parts of the bucket, such as the bucket wall, bucket bottom, and lip plate. Taking NM360 or NM400 wear-resistant plates as examples, when used for the bucket wall, they can prevent the scratching and wear of materials during loading and dumping; the use of wear-resistant plates on the bucket bottom can withstand the gravity and sliding friction of the materials and avoid wearing through too quickly; the use of wear-resistant plates for the lip plate can better resist wear when inserted into the material pile, improving the durability of the bucket and enabling the loader to complete the material loading and unloading tasks efficiently for a long time.

    - In addition, to further improve the wear resistance of the bucket, some surface treatments will also be carried out on the wear-resistant plates, such as spraying wear-resistant coatings, to optimize their wear resistance and better adapt to the frequent operation conditions of the loader.

2. Scraper chain (if the loader is equipped with a scraper conveyor device):

    - When the loader is equipped with a scraper conveyor structure for transporting materials, the scraper chain will constantly come into contact with the materials and generate friction, and the chain also bears a certain tension. The scraper chain made of wear-resistant plates or the use of wear-resistant plates for protection on the surface of ordinary chains can significantly enhance the wear resistance of the chain, prevent the chain from elongating and breaking too quickly, and the wear of the scraper, ensuring the smooth operation of the scraper conveyor device and guaranteeing the material transportation efficiency of the loader.

III. Applications in bulldozers

1. Bulldozing blade:

    - When the bulldozing blade of the bulldozer is used to push earth, rocks and other materials, the front surface directly rubs and squeezes with the materials, and the bottom will also be worn by the ground when sliding on the ground. Wear-resistant plates are used in key parts of the bulldozing blade, such as the cutting edge, the blade surface, and the bottom. For example, using NM400 or above wear-resistant plates to make the cutting edge can keep it sharp and wear-resistant when cutting into the materials and not wear blunt quickly; the use of wear-resistant plates on the blade surface of the bulldozing blade can resist the scratching of the materials, and the wear-resistant plates at the bottom can reduce the wear from contact with the ground, enabling the bulldozing blade to complete the bulldozing operation efficiently and stably, improving the working performance and service life of the bulldozer.

    - At the same time, in order to adapt to different working conditions, such as operating in a hard foundation or rocky site, wear-resistant plates of different thicknesses and hardnesses will also be selected to carry out targeted optimization of the bulldozing blade to ensure that it can still play a good role in harsh environments.

2. Ripper:

    - The ripper is mainly used to break and loosen hard soil or rock layers. Its tooth tips and rake teeth need to be frequently inserted and broken hard objects, and they bear great impact forces and wear. Using high-strength wear-resistant plates to make tooth tips and rake teeth, or forming a wear-resistant layer by surfacing welding wear-resistant materials on their surfaces, can make the ripper more wear-resistant and impact-resistant during operation, effectively avoiding the rapid damage of tooth tips and rake teeth, ensuring the smooth progress of the ripping operation, and improving the overall operating capacity of the bulldozer.

IV. Applications in cranes

1. Hook:

    - During the process of the crane hook lifting heavy objects, it frequently comes into contact and friction with slings, heavy objects, etc., and needs to withstand the gravity of the heavy objects and the impact force during lifting. Some hooks are made of special steel plates with better wear resistance (alloy steel material wear-resistant plates with wear-resistant characteristics), or wear-resistant plates are used to reinforce or surfacing weld wear-resistant materials on the key stressed and easily worn parts of the hook (such as the hook body surface, hook mouth, etc.), improving the wear resistance and fatigue resistance of the hook, preventing the hook from wearing, cracking and other problems due to long-term use, and ensuring the safe and reliable lifting operation of the crane.

    - In addition, for some large and heavy crane hooks, different specifications and wear-resistant performance wear-resistant plate application schemes will be customized according to their lifting conditions and bearing requirements to ensure that the hooks can work stably for a long time in complex and harsh usage environments.

2. Boom (if it is a telescopic or boom with moving parts):

    - During the telescopic and luffing actions of the boom, the internal slider, track and other components will have relative sliding friction, and the external parts may be eroded and slightly friction by environmental factors (such as wind and sand, dust, etc.). Using wear-resistant plates to make sliders, laying wear-resistant plates on the track surface or carrying out wear-resistant protection treatment on the relevant vulnerable parts of the boom can reduce the wear between components, make the telescopic and luffing actions of the boom more smooth and precise, extend the service life of the boom, and ensure the normal operation and lifting accuracy of the crane.

V. Applications in road rollers

1. Road roller drum:

    - When the drum of the road roller is used to compact road surface materials (such as asphalt, sand, and gravel), it comes into direct contact with the ground and continuously rolls and rubs, prone to wear, especially in long-term and high-intensity compaction operations. Wear-resistant plates are applied to the surface of the drum. For example, by welding or inlaying, the wear-resistant plates are fixed on the drum to form a wear-resistant compaction layer. Using wear-resistant plates with moderate hardness and good wear resistance can not only ensure the effective compaction of road surface materials but also reduce the wear of the drum itself, extend the service life of the drum, maintain the good compaction performance of the road roller, and improve the quality and efficiency of road construction.

    - At the same time, according to different road construction requirements (such as asphalt pavement, cement pavement, etc.), wear-resistant plates of different materials and characteristics will be selected to adapt to ensure that the drum can exert the best compaction effect under various working conditions.

2. Scraper (if the road roller is equipped with a scraper device for cleaning the drum surface):

    - For road rollers with scraper devices, the scraper is used to clean the materials adhered to the drum surface. The scraper will be worn during frequent contact with the drum. Using wear-resistant plates to manufacture the scraper can make it better resist wear, ensure that the scraper continuously and effectively cleans the drum surface, and keep the drum in a good working state, thereby ensuring the smooth progress of the compaction operation of the road roller.

In conclusion, the application of wear-resistant plates in various equipment and key parts of the construction machinery industry has greatly improved the wear resistance, service life and working efficiency of the equipment, reduced the maintenance cost and downtime of the equipment, and plays an important supporting role in the stable and efficient development of the entire construction machinery industry.