In this paper,the brief mechanism,equipments and feature of mechanical alloying are introduced.The influence factors of nanometer WC cemented carbide powder produced by mechanical alloying are also reviewed.

Based on TZM molybdenum alloy,new alloys can be produced by addition of cerium,which have the excellent high temperature properties,meanwhile,process can be controlled more easily.Their microstructure is discussed in detail in the paper.It indicates that disperse particles exist not only at grain boundary but also in grain,so they can strengthen both boundary and grain simultaneously.But coarse disperse particles and Mo-Ti solid solution are disadvantageous to alloy properties.The disperse phase in the alloys can be enriched by chemical treatment,the phase structures are identified by XRD and EDS technique.Rare earth elements of yttrium and cerium are proved that they can form composite oxides together with titanium and zirconium.In the alloys titanium presents three possible states:the composite oxides mentioned above,composite particles as Ti(CN)or Mo-Ti solid solution.

The paper analyzed the history and present situation of the scandium science and technology development,discussed the problems existing in the scandium science and technology development.It is pointed out that efforts should focus on how to reduce the cost and price of scandium product to the level that user can accept so as to improve the international competivity.At present,research must stress on the development of new technology for the low cost production of scandium-bearing master alloy and the industrial application of aluminum-scandium alloys.

Description is made of the negative influence of WC contact in cemented carbides on hard alloy properties,the reason and mechanism of WC contact formation as well as method and efficiency of decrease of WC contact ratio by ultra-quick Cooting.

In view of Ti and Ti alloy physical and chemical properties and their effect on lowering tank weight,brief description is made of the present application of USA and Russia developed Ti and Ti alloy in the tank.

In this paper,the development of beryllium metallurgy and beryllum alloys are reviewed in China.

Detailed description is made of the engineering design of heat supply pipeline monitoring system of Qingdao Power Plant.Functional concepts of different kinds of monitoring stations and control centers are designed to ensure automatic control and defect detection as well as fee structure based on heat.

Detailed analysis and discussion are made of J2EE and Net in respect of platform structure,theory,performance,applications,Web-based application and software development.Also a kind of java-based Microsoft.NET framework is given.It will be beneficial for applied programme developers to decide which platform and technology should be abopted.

The latest development of hard metal scrap recovered by mechanical processing was presented.High quality hard metal can be prepared by simple breaking and grinding from hard metal scrap without any chemical treatment.

The Paper describes the analysis and demonstration of NaOH substitution for some soda;soda solution initial concentratoon and min.temperature during dissolution,etc in soda autoclaving of tungsten ore.Some helpful conclusions are drawn.