1. Excellent wear resistance
The chemical composition of the alloy wear-resistant layer has a carbon content of 4 to 5% and a chromium content of 22 to 28%. The volume fraction of Cr7C3 carbides in the metallographic structure is more than 50%. The macroscopic hardness is HRC60 to 65. The hardness is HV1400～1800. Because the carbides are distributed perpendicularly in the direction of wear, even when compared with cast alloys of the same composition and hardness, the wear resistance is more than doubled. The comparison of wear resistance with several typical materials is as follows:
(1) and low carbon steel; 20～25:1
(2) and as-cast high chromium cast iron; 1.5～2.5:1
2. Good impact resistance:
The base plate of the wear-resistant composite steel plate is low carbon steel or low alloy. Tough materials such as stainless steel reflect the superiority of bimetal. The wear-resistant layer resists the wear of the wear medium, and the substrate bears the load of the medium, so it has good impact resistance. It can withstand the impact and wear of the high drop hopper in the material conveying system.
3. Better heat resistance:
The alloy wear-resistant layer is recommended to be used under ≤600℃. If vanadium, molybdenum and other alloys are added to the alloy wear-resistant layer, it can withstand high temperature wear of ≤800℃.
The recommended operating temperature is as follows:
Common carbon steel substrate is recommended to be used under the working condition of not higher than 380℃;
Low-alloy heat-resistant steel plate (15CrMo, 12Cr1MOV, etc.) substrate is recommended to be used under working conditions not higher than 540℃;
The heat-resistant stainless steel substrate is recommended to be used at no higher than 800℃.