Desempenho da placa de aço composta resistente ao desgaste

This guide covers the performance aspects of composite wear-resistant steel plates. Tem como objetivo fornecer informações úteis para todos os leitores.

Resistência ao desgaste

The wear resistance of composite wear-resistant steel plates refers to their ability to withstand wear under certain friction conditions. It depends on the type of wear and the structure of the cladding layer. Wear resistance is a crucial application of cladding.

Resistência à corrosão

Corrosion is the damage caused by the surrounding medium to the metal. The corrosion resistance of cladding alloys depends on the service conditions of the cladding parts. Different working environments and stresses affect corrosion resistance. Common corrosion-resistant cladding metals include copper-based, à base de níquel, ligas à base de cobalto, and austenitic stainless steel. Por exemplo, the inner walls of petrochemical containers are often clad with stainless steel. During cladding, the dilution rate of the matrix to the cladding layer should be monitored to ensure the required alloy content for corrosion resistance.

Resistência ao impacto

Composite wear-resistant steel plates can be damaged by foreign objects, often alongside abrasive wear. The impact resistance of cladding alloys depends on their compressive yield strength and toughness. Yield strength relates to plastic flow under impact, while toughness is connected to cracking and peeling.

High-Temperature Usability

The performance of cladding alloys at high temperatures is determined by their heat resistance. Materials used at high temperatures must endure wear, corrosão, and stress release, necessitating thermal strength, dureza, resistência à fadiga, creep resistance, resistência à oxidação, and high-temperature gas corrosion resistance. The manganese content in the cladding layer enhances oxidation resistance. Cladding options include high-manganese martensitic stainless steel, aço para ferramentas, die steel, nickel-based welding alloys, and cobalt-based cladding alloys.

Preventing Cracking and Peeling

Differences in composition and linear expansion coefficients between the cladding layer and the base metal can cause internal stress, leading to cracking and peeling during cooling. Para evitar isso, it is crucial to minimize welding thermal stress during surfacing.

Ensuring High Hardness in Wear-Resistant Layers

To maintain hardness in wear-resistant layers, it is essential to prevent excessive dilution and burning of alloy elements. Using a small current and short arc welding can help achieve this.

This overview provides a foundational understanding of composite wear-resistant steel plates, highlighting their key features and considerations for effective use.