The effects of spheroidization by using a Particle Composite System on both the particle characteristics and the feedstock rheologies of HDH Ti powder were investigated.

The Ni-Cu-C solid self-lubricating materials were prepared by melting method and the spheroidization effect of rare earth magnesium on graphite of Ni-Cu-C was studied.

The results show that the proceess of carbide spheroidization can be divided into three stages.

Several nodulizing treatment processes commonly used in nodular iron production was introduced including : plunging magnesium under pressure, sandwich ( pour over ) processes, rotary ladle processes , cored-wire feeding processes, tundish ladle processes and so on.

Using medium frequency induction furnace on remelting Z14 iron achieves the liquid iron with comparatively stable composition and temperature,adding nodularizer and inoculant according to proper ratio makes spheroidizing and inoculation,thus the wobbly dirvepipe in use for 530mm rolling mills can be produced stably.

Some new techniques of the spheroidizing high strength solution treatment, boiling water quenching and high temperature tempering of the carbides in the electroslag casting of GCr15 steels are mainly studied.

The flexible jointed chains are used to connect the tundish cover and wireless remote control electronic scale is adopted for the new type of tundish cover spheroidizing method.

Tundish-cover pour-over nodulizing process can stabilize and improve the absorptivity of Mg and the integrative performance of ductile iron greatly, steadily improve the production of ductile iron, reduce the Mg light and soot, so it is a very prospect ki.

So people append a ladle cover with a channel basin on the ladle with a dyke for nodulizing process, we call it tundish-cover nodulizing.