Calculation of Effective Puring Time for Heavy Castings;

The study on the mould flux for heavy casting;

The types of burning-on defects of heavy castings and their formation reasons were introduced,and the influences of some factors on the effect of coatings to prevent burning-on defects were analyzed including:ingredients of the coating, combination of refractory granularities,high temperature stability,sintering property,peeling off property,and so on.

When calculating 3-D velocity and temperature fields of mould filling and solidification process by turbulent model for large castings,increasing accuracy and efficiency of numerical calculation were investigated.

The production status of heavy steel castings in our country and the gap compared with some advanced foreign enterprises were presented in this paper.

This article has described the composition of the alcohol-based zircon powder coating for the heavy steel casting and the production process routine as well as the process property characteristic,meanwhile the effects of the material selection and the production process of the coating on its property have been researched.

Shrinkage and shrinkage porosity, stress and deformation often occurs during the production of heavy steel casting.

The current situation and the future mission of the industrial standardization for the heavy casting and forging in China have been analyzed in this article,and issues existed in current standardization work of the heavy castings and forgings as well as the key emphasis in the standardization work for the future have been set forth as well.

Analysis of fracture residual stress of naval gun large-scale cast aluminium piece;