The relationship between brittleness resistance and content of Fe Si B amorphous alloy have been determined experimentally. By analyzing the cause of brittleness in detail, a conclusion is formed that the brittleness of FeSiB amorphous all is influenced by Si and B content. The brittleness resistance will be improved greatly by properly control of B and Si content.

High temperature sintering process of Mo 3% Re alloy by dry hydrogen and final vertical system was investigated. It was shown that the Mo 3% Re alloy by dry hydrogen sintering features finer grain sizes, higher tensile strength, elongation and microhardness values than the alloy by final vertical sintering.

DGJW40 is a new kind of steel bonded carbide made by a new technology. By studying and comparing the microstructure of this alloy before and after forging, the results show that the microstructure and mechanical property of this alloy has been effectively improved after forging.

The supported catalyst Ln 2O 3/Al 2O 3 prepared by coprecipitation calcination has remarkable effect on the catalytic synthesis of DOM to larger specific surface and high dispersion.

Detailed analysis is made of the granulating mechanism of sintering material and drum liners. Based on comparison of lining materials for engineering purpose and its application, the paper indicated that during production, the ideal liner will adsorb a thin layer of mixed material at its surface, which will not be bonded and thickened gradually, resulting in better mixing and granulation and longer service life. The selection of proper liner is important for higher filling rate of the drum, and better permeability of the mixed material as well as larger output of the sintered ore.

Lattice constants in tungsten and cobalt were precisely measured by X ray diffraction. The results of measurement are that the lattice constant S in tugnsten is a=0.316468nm, and in cobalt is a=0.354410nm. The crystal structure of fcc is dominant in cobalt powder, and hcp only a few.

The applications of rhodamine B dyes in photometric analysis of metals and alloys are presented. The systems and conditions of determination, and limit and range of determination, as well as interferences of corresponding method are also reviewed.

The method and step of drawing the data curves with two ordinates using Micrsoft Excel software are presented with illustration.

The relations between APT evaporation crystallization conditions (temperature, agitation, degree of supersaturation and density of mother solution at the terminal) and size control are reviewed.

After H 2SO 4 leaching of ytterbite and RE precipitation with RE compound salt and oxalic acid, Be can be effectively separated from RE. By this way, RE mixed hydroxide and commercial Be oxide can be obtained.