Microstructure and properties of overlay welding alloy layer of K360 wear-resistant steel

This article provides details of the microstructure and properties of overlay welding alloy layer of a K360 wear-resistant steel. The wear-resistant steel is chosen for its excellent properties against severe wear and high-temperature corrosion. Wear resistant steel is widely used for abrasion and corrosion highly demanded in industries such as automotive, building, and mining.
    
The K360 alloy layer is deposited through the overlay welding process. It is a multiple-layer welding process. The welding layers consist of a base layer, interlayer and an alloy clad layer. In this article, the effect of process parameters on the microstructure and properties of the overlay welding alloy layer of the K360 steel is discussed.
    
Materials and Methods
n this article, the layer-by-layer welding technique is used to deposit the alloy layer of K360 wear resistant steel. The welding parameters include, weld current, welding speed, and welding angle. A digital microscope was used to view and study the microstructure of the overlay welds with different welding parameters. Hardness tests were carried out on the overlay welds and the results were compared with the original materials.
    
Results and Discussion
The results of the digital microscope showed that the alloy layer of K360 steel had controlled microstructures after welding. The microstructures of the material encased by the alloy layers were different from the microstructures observed in the original material. The microstructures of the alloy layer of K360 steel had a cellular pattern. The weldings layers of the alloy layer had a range of sizes from 4 to 8 mm.
    
The hardness test results showed that the hardness of the alloy layer was higher compared to the original material. The hardness of the alloy layer ranged from 220 to 250 Hv. The test results also showed that higher welding parameters resulted in a higher hardness for the alloy layer.
    
Conclusion
This article discussed the microstructure and properties of overlay welding alloy layer of K360 wear-resistant steel. The digital microscope results showed that the alloy layer had controlled microstructures. The hardness test results showed that the hardness of the alloy layer was higher compared to the original material. The welding parameters had an influence on the hardness of the alloy layer, with higher welding parameters resulting in a higher hardness.

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