What are the advantages of bimetal wear-resistant elbows?

Advantages of bimetal wear-resistant elbow / bimetal wear-resistant composite elbow:
1. Good wear resistance Medium chromium rare earth boron wear-resistant alloy, the hardness can be controlled according to different working conditions, the chromium hardness can be controlled within the range of HRC45-65, and it has high toughness.
2. The bimetal wear-resistant elbow has strong corrosion resistance, high temperature resistance and high wear resistance. Because of the composition and structural characteristics of Rα carbides, and the matrix with solid solution content Cr has strong heat resistance and corrosion resistance, and then The addition of Mo makes it exhibit excellent corrosion resistance and wear resistance in high temperature or corrosive environments, and a certain amount of rare earth is added to make the internal structure of the alloy more compact, and a protective film is formed on the surface to prevent the infiltration of carbon. Increased wear resistance and corrosion resistance; rich in a certain amount of boron to make the hardness of the alloy change to a hardness that cannot be achieved by carburization, and rich in a certain amount of Mn to increase the impact fatigue resistance of the alloy, making the alloy The wear resistance is better than high chromium alloys and rare earth alloys.
3. The weldability of the bimetallic wear-resistant composite elbow is better. In the past, high-chromium alloys and rare-earth alloys have extremely high carbon content in order to achieve a certain hardness, so the weldability is extremely poor, while medium-chromium rare-earth boron alloys basically It is improved by boron, so the weldability is better than that of high chromium alloy and rare earth alloy, but it is not ideal. We have to rely on the weldability of A3 and 16Mn on the outer wall to achieve the ideal welding strength, so that the overall elbow is safe and reliable. .