Effect of Mg Content in Nodulizer on the Absorptivity of Mg;

Studies on the Application of the Ytirium Heavy Rare-Earth Composite Nodulizer;

Effect of Nodulizer on the Mechanical Properties of Ni-Fe-C-Si Self-lubricating Material

The paper studied and analyzed uitra-high carbon cast steel with spheroidal graphite microstructure morphology after as-casting,annealing,normalizing and forging with spheroidal graphite cast steel by means of appropriate treatment using the spheroidal agents developed by the author on the liquid of steel.

Exploration on Phase of Spheroidizer and A Judgement on the Quality;

The result showed that the cored wire injection process has the advantages asfollows:(a)Addition amount of both the nodularizing alloy and inoculant could be accurate;(b)The nodularizingreaction takes place at the ladle bottom that is beneficial to stabilize nodularizing effect;(c)The w (Si) content ofnodularizing alloy is relatively lower that is beneficial to increase w (Si.

The effective magnesium content of nodularizing alloy decreases with increasing of its magnesium oxide(MgO)content.

An introduction was made to the development situation of nodular cast iron in past 60 years in its output,theory on the nodular graphite formation mechanism,nodularizing alloys and nodularizing treating process,heat treating process,etc.

48% nodularizer usage and decreased 30～40 ℃ for the molten iron temperature falling down so as to lower the reject ratio of slag inclusion for product of crankshaft, with improved operational environment.

Industrial application of DQ type polypropylene spherical catalyst;

This paper evaluated the performance of spherical catalyst HDC for propylene polymerization and explored the influences of prepolymerization, polymerization temperature, time and hydrogen concentration on the polymerization behaviour of HDC.