4%Mg alloys on the mor-phology of dendrite α phase was investigated and the amount of dendrite αphase and the characteristic parameters, the primary dendrite spacing and secondary dendrite arm spacing, were also measured.

Study on Secondary Seismic Acquisition in Southern Steep Zone in Biyang Depression;

Througn designing three axial slots in internal threaded portion and optimizing nib structure,a design was made on the injection mould with a two-step ejecting mechanism with non-rotating.

Reheating Process for the Semi-solid A356 Alloy;

Detection of the Reheating State of Semisolid Hypoeutectic Al-Si Alloy;

The effects of processing parameters of semi-solid billets preparation,reheating temperature and holding time on the semi-solid slurry microstructure of AlSi7MgBe alloy by liquidus semi-continuous casting were studied.

The contact pattern of boiler auxiliary machinery was modified with the adoption of layer-by-layer coal charging technology,realizing secondary dedusting,improving the heat efficiency and reliability of boiler.

Appropriate choice of top draft hood type is a key point for the modification project of secondary dedusting of converter off-gas at Xingtai Steelmaking Plant.