Pearlite cast ductile iron crankshaft and cast ferritic ductile iron automobile chassis parts, respectively, of the second car factory in Nanjing Automobile Factory and the first automobile plant put into operation. This indicates that China cast ductile iron production reached a high level. With suitable kits for desulfurization, double melting method, instantaneous breeding, breeding techniques and the use of block audio detection and rapid analysis, thermal analysis technology, it marks China's massive water production technology with the international advanced level of automobile castings the gap is narrowing.

Experimental study of the large cross section (wall thickness greater than 120mm) ductile iron metallurgical factors and the corresponding measures of the production process. With the right amount of ytirium composite ball agent, forced cooling, solidification, delayed breeding, if necessary, add small amount of antimony, bismuth prevents graphite iron castings central portion distortion and osteoporosis and other organizations, has been successfully fabricated 38 tons of large and complex structures 17.5 tons of diesel body section is 805mm ductile iron rolls and the like.

Research and Application of Bainite Ductile Iron - austenite. The early 1970s, almost the same time China, the United States, Finland three countries announced the successful research with high strength, high toughness of austenitic - bainitic ductile iron (ADI collectively internationally), the tensile strength of this material up to 1000MPa, so it is widely used in gear, and various structural parts, as compared with steel, Austria - Tony ductile iron has significant economic and social benefits.

Ductile iron pipe and horizontal continuous casting ductile iron profiles. China has successively built several ductile iron pipe plant, and in recent years, there will be several ductile iron pipe plant built. In 2000, China centrifugal casting ductile iron pipe with an annual output of 90 million tons. In addition, China's self-developed horizontal continuous casting ductile iron production line profiles have been identified by the State, and there are many companies put into operation. Coupled with China imported a production line, to 2002, China's annual output capacity ductile iron profiles of several tons.

Systematic determination of rare earth magnesium ductile iron mechanical properties and other properties, providing designers with the relevant data. Determination of rare earth magnesium ductile iron proportion, thermal, electromagnetic and other physical properties, and to study the graphite matrix structure influence of microstructure on the ductile properties of binding standards. Systematically measured ferritic ductile at room temperature, low temperature, static and dynamic conditions of the various properties. In addition, the study of stress-strain properties of rare earth magnesium ductile iron, small energy repeated impact resistance and fracture toughness, and began to be used to guide production. Combined with ductile iron gear applications, but also systematically studied the bending fatigue strength and contact fatigue strength of nodular cast iron, ductile iron and point gear pitting, spalling mechanism and so on.

Rare earth magnesium ductile iron. In the high-strength low alloy ductile iron, in addition to copper, molybdenum more research, but also nickel, niobium were studied. In the use of natural production of vanadium and titanium vanadium alloy ductile cast iron connection, some units in China a lot, the system work. Although manganese nodular cast iron is not stable enough in performance, system research and production applications, and achieved significant economic benefits.

Ductile covers main application areas: municipal roads, highways, telecommunications, electricity, water, community, schools and other parks.