Boertou Xin Feng Machinery and Equipment Co., Ltd. specializes in producing various brands of ductile iron castings, Ni-Mo-Cr alloy cast iron, gray cast iron, and other high-quality mechanical accessories. Representative brands of ductile iron castings include QT400-18, QT500-7, QT600-3, QT700-2, and QT800-2; while representative brands of gray cast iron castings include HT200-350. The company has its own product manufacturing processes and testing methods, with main products including diesel engines, compressors, trains, cars, elevators, pumps, pump heads, valves, impellers, and construction machinery accessories.

Ductile iron casting is a casting process that utilizes rare earth magnesium alloy as the nodulizing agent, similar to cupola and gray iron. To ensure good nodulation, the sulfur and phosphorus content needs to be lower. Considering the temperature loss during孕育, the iron melt temperature should be higher than that of gray iron. Depending on the grade of the ductile iron produced, carbon content may need to be controlled, and a certain proportion of scrap steel should be added to the charge. Additionally, a孕育 iron melt ladle, a small sampling spoon, and molds for triangular and cylindrical test pieces are required. Steel shavings from the lathe and a certain amount of straw ash are needed. The stirrer for the iron melt is made with a 10mm thick layer of graphite or carbon powder wrapped around the steel rod at the head. Before starting the furnace, the rare earth alloy, silicon iron, manganese iron, and other alloy components required for the product are crushed into small pieces of about 15mm in size. Weigh the amount needed for each iron melt package.