| Wear-resistant materials in various of industrial fields are indispensable to the consumable parts of equipment, which not only has a wide range of applications in the industrial field, but also the wear consumption is very huge. China in recent years also increased investment in low alloy steel wear but there is always a wide gap with foreign countries. This paper in the light of the status quo of research and development of wear-resistant materials at home and abroad optimize the design using orthogonal experiment method. It has studied both the microstructure and properties of the low alloy wear-resistant steel from the chemical composition, heat treatment process,. This paper also discussed the effect of heat treatment temperature on the wear resistance.According to orthogonal table, we designed nine kinds of samples of chemical composition. At first, we take the metallographic test, hardness test, impact toughness test and abrasion test to analyze. The second, we analyzed and optimized chemical composition by optimization method in order to get the best sample. At last, we designed three heat treatments processes to research the microstructure and properties of optimal sample. Test results are as follows: the sample of A2B1C2(ie, 0.45% carbon, 3.0% chromium, 0.4%molybdenum) has the best property in both hardness and impact toughness. And at 880℃ + 250℃ quenching and tempering the basic structure of the sample are lath martensite and residual austenite. At the same time it has been verified that in practical applications the use of this material life of wear plate has been significantly improved. |
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