Low-carbon multi-component alloy steel for excavator bucket tooth, and its production technology

Abstract

The invention discloses a low-carbon multi-component alloy steel for an excavator bucket tooth. The alloy steel comprises 0.20-0.26wt% of C, 0.4-0.6wt% of Si, 0.6-1.2wt% of Mn, 0.5-0.8wt% of Cr, 0.4-0.6wt% of Mo, 0.2-0.3wt% of Cu, 0.8-1.5wt% of Ni, 0.08-0.12wt% of Ti, 0.04-0.06wt% of Y, 0.02-0.04wt% of Ce, 0.02wt% or less of P, 0.02wt% or less of S, and the balance Fe and impurities. The micro-alloying treatment of trace elements comprising Mo, Cu, Ti, Ni, Y, Ce and the like increases nucleation and further refines crystal grains, so the number, the size and the form distribution of carbides are effectively controlled, included slag is deteriorated, the metallurgical quality and the comprehensive wear resistance are improved, and the comprehensive performances and the service life of the alloy steel are maximally improved. The adoption of a reasonable heat treatment technology, appropriate annealing treatment and appropriate quenching tempering substantially improves the hardness and the impact resistance of the alloy steel.

Description

technical field

[0001] The invention relates to a low-carbon multi-component alloy steel for excavator bucket teeth and a production process thereof, belonging to the technical field of alloy steel manufacturing process. Background technique

[0002] Excavator bucket teeth are wearing parts that are consumed in large quantities in mining operations. The working conditions are harsh, and most of the failure modes are wear and tear, and a few of them are broken. The bucket teeth are generally installed at the front end of the excavator bucket, which is a cantilever beam member, directly in contact with ore, sand, rock and other materials. When contacting the material, it not only bears the impact action, but also bears the bending moment action. During the service process, the tip of the bucket tooth is subject to large impact and sliding abrasive wear, and various furrows and deformations often appear on the surface of the tip, resulting in surface wear or shedding. The mos...