High-strength wear-resistant bucket tooth for excavator and preparation process of high-strength wear-proof bucket tooth

Abstract

The invention provides a high-strength wear-resistant bucket tooth for an excavator and a preparation process of the high-strength wear-resistant bucket tooth. The high-strength wear-resistant bucket tooth comprises an alloy steel body, a wear-resistant permeation layer and a corrosion-proof coating. The alloy steel body comprises 0.34-0.37% of C, 0.8-1.2% of Si, 0.65-0.7% of Mn, 0.3-0.45% of Mo, 2.8-3.3% of Cr, 0.25-0.28% of Ti, 0.1-0.15% of Ni, 0.18-0.2% of Y and the balance Fe and inevitable impurities. The wear-resistant permeation layer is an Al-Mo-La-Cr multi-component permeation layer. The corrosion-proof coating is an organic silicone resin composite coating. The element matching of the alloy steel body is reasonable, the hardness can reach over 300 HV, the impact toughness can reach 28 J/cm<2>, and in cooperation with the metal wear-resistant permeation layer, the abrasive resistance is improved greatly, the surface strength of the wear-resistant permeation layer can reach over 1,000 HV, the bonding force between the wear-proof permeation layer and the inner-layer alloy steel body and the outer-layer corrosion-proof coating is high, the stripping resistance is high, the hardness and strength of prepared products are high, and the high-strength wear-resistant bucket tooth is excellent in wear resistance and impact resistance and long in service life and has the high economic value and social benefits.

Description

technical field [0001] The invention relates to the technical field of excavator bucket tooth preparation, and specifically designs a high-strength wear-resistant bucket tooth for an excavator and a preparation process thereof. Background technique [0002] The bucket at the front end of the excavator is the main part of the work, and the teeth on the bucket are the main wearing parts on the excavator. Because the working environment of the excavator is generally harsh, the bucket teeth or tooth lips of the excavator are in contact with each other for a long time. For such materials, the maximum single-tooth pressure can reach 150-200MPa, and the bottom half rubs against the ground. Therefore, relatively high requirements are put forward for the material of the bucket teeth, which must be high in strength, wear-resistant, and tough. The service life of the bucket teeth will be long, so it is necessary to improve the service life of the bucket teeth by changing the material r...

AI Technical Summary

Problems solved by technology

In addition to adjusting and matching the elements of the alloy steel material, the existing high-strength alloy will also coat the outer layer of the alloy steel with a wear-resistant layer to improve the service life. For example, the alloy surfacing technology is used on Q235 steel or ordinary carbon steel The surface is directly surfacing with alloy electrodes or wires. The matrix and the wear-resistant alloy are divided into two layers to improve the wear-resistant life. It will cause fatigue stress on the alloy layer, resulting in granular spalling and cracking