Research on the quality of welded joints of P265GH heatresistant steel pipes at electron beam mechanized welding

This paper analyzes the quality of welded joints of high temperature resistant steel pipe at electron beam welding, knowing that the mechanical properties of these types of steels are influenced by the interaction of different processes specific to physical and mechanical metallurgy. Analyzing the values of the local hardening estimator ΔHV10 calculated between the characteristic areas of welded joints, it is observed that it has a decreasing tendency at thermally de-stressed joints, in all areas of the welded joints, especially in the welded seam.

Application of Inorganic Ceramic Membrane in Wastewater Treatment I: Process Research and Parameter Optimization

Inorganic ceramic membrane has been one of the hottest research field both in environmental protection and materials, as it has so much advantages, such as, high-temperature-resistance ,acid and alkali-resistance , adequate distribution of aperture , steady chemical property , high strength , large flux, long lifetime, anti-pollution, simple structure, small footprint, few corollary equipment, easy installation, no chemical additives, high separating efficiency, high degree of automation control and so on. Some application on environmental progress in the field of inorganic ceramic membrane technology applied in treatment of food industry wastewater, mechanical metallurgy wastewater and petrochemical wastewater was summarized in this paper, and the existent problems and the future research direction was discussed.