English Views: 908 Author: Site Editor Publish Time: 2021-09-20 Origin: Site
There are many materials used in excavator buckets. For instance, because of the strength of its material, the Doosan excavator rock bucket quality is very good. Excavator buckets are made of several different materials, but all these materials are of the steel or iron type. The type of material is selected according to the loading and manufacturing method of the part. In this article, we will discuss the most used materials for pins, sides, teeth of excavator buckets, etc.
Excavator pins are usually made of AISI 4130 or 4140 steel. AISI 4000 series steel is chromium molybdenum steel. The first number 4 indicates the type of steel and its main alloy composition. The second number 1 represents the percentage of alloying elements, that is, the mass percentage of chromium and molybdenum is about 1%. The last two digits are the carbon concentration, the increment is 0.01%, so the carbon content of AISI 4130 is 0.30%, and the carbon content of AISI 4140 is 0.40%. Chromium improves corrosion resistance and hardening ability, while molybdenum also improves strength and hardening ability.
Not only excavators, but tractor pins are also of different types. For example, our company produces different kinds of pins, such as tractor top link pin, tractor drawbar pin, tractor 3-point hitch pins, etc. Like pins made for tractors, the steel used in the production of excavators is likely to have been heat treated by induction hardening. This heat treatment process produces a hardened surface. This will improve the abrasion resistance and internal toughness of the excavator. Note that the bushing is usually made of the same material as the pin. It is worth noting that some of the cheaper pins may be made of AISI 1045, which is a medium carbon steel that can be hardened.
The sides and blades, such as caterpillar cutting edge, auger cutting edge, granite cutting edge, etc. of the bucket are usually made of AR steel plate. Generally, AR360 and AR400 are used. Note that the number after AR is the Brinell hardness of steel. AR360 is a medium-carbon low-alloy steel that has been heat treated and has excellent wear resistance and high impact strength. AR 400 is also heat treated, but it can provide wear resistance and superior yield strength. Both steels have been carefully quenched and tempered to achieve product quality, which is the key to a good bucket.
In order to better understand what the bucket teeth are made of, we must first understand that there are two ways to make bucket teeth, that is, casting and forging.
The cast bucket teeth can be made of low alloy steel, with nickel and molybdenum being the main alloying elements. At the first place, molybdenum improves the hardenability and strength of steel and helps reduce some forms of pitting corrosion. At the second place, nickel increases strength and toughness, and helps prevent corrosion. They can also be made of au tempered ductile iron that has been heat treated for wear and impact strength.
Forged bucket teeth are also made of heat-treated alloy steel, but the type of steel varies from manufacturer to manufacturer. Heat treatment improves wear performance and improves impact strength.
Usually made of ASTM A572 grade 50, the excavator bucket shell is strong. This steel is alloyed with niobium and vanadium. Vanadium helps maintain the toughness of steel. This grade of steel is an ideal shell material because it provides good strength and the weight is equivalent to similar steel, such as A36. It is also easy to weld and shape.
