U92 Pick

Dulbert Hard Rock Picks' Strategy for Tackling Challenges

The Wisdom in Material Selection

Dulbert hard rock picks are highly meticulous in material selection. Their base is typically made of high-strength alloy steel, which undergoes special smelting and processing techniques to achieve excellent strength and toughness. For instance, certain models use steel containing multiple alloying elements (such as chromium, molybdenum, etc.). These alloying elements form strengthening phases, enhancing the steel's strength and hardness while ensuring a certain level of toughness, making the picks less prone to fracture under impact.

As for the carbide tip, Dulbert hard rock picks employ high-quality carbide materials. These carbides exhibit high hardness, high wear resistance, and good impact resistance. By optimizing the alloy composition and manufacturing process, the content and uniform distribution of hard phases in the carbide are improved, thereby enhancing the overall performance of the carbide tip.

Unique Manufacturing Processes

In terms of manufacturing processes, Dulbert hard rock picks have their own unique approaches. For example, advanced powder metallurgy techniques are used to produce the carbide tips. This process allows precise control over the alloy's composition and microstructure, ensuring more stable and reliable performance of the carbide tips.

When connecting the carbide tip to the base, Dulbert hard rock picks utilize special welding techniques. By precisely controlling welding parameters, a strong metallurgical bond is formed between the carbide tip and the base, effectively preventing the tip from detaching during use.

Targeted Design Optimization

To address different extreme conditions, Dulbert hard rock picks undergo targeted design optimizations. For hard rock formations, special tooth shapes are designed. For example, a sharp tooth tip design is adopted to reduce resistance when the pick cuts into the rock, improving cutting efficiency. At the same time, the tooth body is thickened to enhance the overall strength of the pick, enabling it to better withstand the impact of hard rock.

For high-wear working conditions, Dulbert hard rock picks apply special coating technologies to the tooth surface. For instance, a coating with high hardness and low friction coefficient is applied, significantly reducing friction between the pick and the rock, minimizing wear, and extending the pick's service life.

Real-World Application Cases Demonstrate Effectiveness

In a large infrastructure tunnel project in Saudi Arabia, the engineering work passed through a highly silicified rock formation zone, where the ambient temperature remained high for extended periods, posing a significant challenge to the picks. The Dulbert hard rock picks played a crucial role in this project. During a 72-hour continuous load test conducted on-site, they performed exceptionally well. The average service life of the picks was extended by 2.3 times compared to the original solution, the overall tunneling efficiency of the equipment increased by 34%, the frequency of consumable replacements decreased, and the overall project construction cycle was shortened by 11%. The project's chief engineer reported that the performance of Dulbert hard rock picks in silicified rock formations exceeded expectations, providing new technical references for similar geological conditions.

In a roadway tunneling project at a coal mine in Yunnan, the challenge of coarse sandstone geology was encountered. Traditional picks wore out quickly in such environments, severely impacting tunneling efficiency. Dulbert provided two solutions: alloy bean picks and alloy composite-coated picks. The customer installed 8 picks on the drill head, with 4 of each type. After two days of tunneling, a total of 9 meters was excavated, and 2 picks of each type were replaced. This result far exceeded the project team's expectations, significantly reducing replacement frequency, improving tunneling efficiency, and lowering overall maintenance costs.

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