KmTBCr26 is a high-chromium anti-wear white cast iron with high carbon content, chromium as the main alloying element, and excellent performance.
Heat treatment Usually, the metallographic structure of high chromium cast iron in the as-cast state is: austenite + martensite + carbide + pearlite. In order to develop the full hardness potential and optimum wear resistance of the material while at the same time imparting maximum toughness to the material, heat treatment is required. Usually the austenitizing temperature is about 960-980°C, and the temperature is kept for 2 to 4 hours (depending on the size of the ball). If 0.3-1.0% Cu is added, it must be kept for more than 6 hours to destroy the stability of austenite. Tempering treatment can be carried out in two temperature ranges, and tempering is carried out in the lower temperature range (200-300 ° C), the purpose of which is to temper the martensite obtained in quenching, thereby reducing fracture and Sensitivity to shock. In the state of high-impact abrasive wear, if you want to obtain austenite structure, under the ideal situation of chemical composition control, you only need to perform high-temperature aging treatment once to remove internal stress, which can meet the general needs. Conclusion Practical application and experiments show that it is suitable to produce grinding balls with high chromium cast iron materials, as long as attention is paid to the implementation of casting and heat treatment processes, the selection and control of chemical components, metallographic structure, and the matching of hardness and toughness during the production process, It can give full play to the efficiency of the material and meet the requirements of use.
Applications :Abrsion Resisting Cast lron Low Alloy and High Alloy Grade
Country Code: GB
Steel Type: KmTBCr26
The outer wall of the bimetal composite wear-resistant pipe is made of ordinary seamless steel pipe, which is compounded by a high-chromium cast steel lining through a centrifugal forming process. The outer wall of the elbow is made of shrimp elbows, and the inner layer is made of high-chromium cast steel, which not only has the wear resistance of high-alloy cast steel, but also can withstand pressure, and has higher mechanical properties.