Brief introduction is made to the domestic vacuum sintering integral furnace.The furnace functions and related testing data showed that the furnace is close to or has come up to the international advanced standard.

Description is made of the basic functions of the design pattern to solve specific problems.Analysis is made of the relationship between the design pattern and programme structure,based on which discussion is also made on how to use the design Pattern to improve the programme structure.

In order to meet the control requirements of the boiler which is a multiple variable system with non-linear controlled values,Large time variation and mutual coupling,the P-Fuzzy-PI control strategy is presented which is composed of fuzzy control and conventional PID control.The design and simulation analysis of the controller are introduced.With related data,comparsion of the performances on PID control is made,Fuzzy control and P-Fuzzy-PI control

This paper introduces the development of plant management system of a factoryGeneral methods and steps of development are also introduced in this paper.

Applications of microwave in hard metal production and its raw materials treatment was briefly presented with emphasis placed on the microwave sintering of wolframite soda mixture.Optimal conditions for microwave treating of wolframite-soda mixture are soda content 30%,temperature 800-850℃,treatment time 20-30minutes.Water leaching gives a tungsten recovery of 99% in sodium tungstate solution.

This paper presents the results of synthesis of nanocomposite WC-Co powders at room temperature-by high-energy ball milling.Discussion is made on the powder property.

Assuming that during the phase flow of PIM particle-binder,the powder particles are spherical with irregular size,the powder particles and gas molecule have similar physical and kinetic properties.Study is made on the particle phase motion during PIM two-phase flow based on the method similar to gas molecule kinectics.Comparison is made between the powder particle motion and gas molecule motion during PIM mould-filling.Based on Boltzmann equation,analysis is made of the physical and kinectic parameters of the powder particle,quality/moment/and energy conservation equation of the PIM particle-binder flow are established,providing a theoretical basis for digital simulation of the two-phase flow and analysis of two-phase separation.

Study is made of the treatment of acid effluent from ammonium molybdate plant by addition of ammonium sulfide and pH value control with ammonia spirit.Under proper condition,over 90% of heavy metals Cu,Pb,Zn,Fe in the effluent are precipitated and removed,>98% Mo coprecipitated into the residue.Then,the precipitation residue is dissolved by ammonia spirit with 84.59% Mo converted into ammonium molybdate solution,while Fe,Cu,Pb in the residue are basically insoluable,part of Zn going to ammornium molybdate solution ,which can go directly back to the main circuit of ammonium moybdate.The treated acid effluent is retreated for removal of alkali metal ion before crystalized to produce ammonium nitrate.

The mechanical alloying of both Ti-20%Cr and Ti-30% Cr alloys with titanium powder and chromium powder as raw materials is studied.The results show that with the increase of ball-milling time,Ti-Cr powder particle and grain become smaller and smaller,and layer structure is thiner and thiner,and the X-ray diffraction peaks of both titanium and chromium become broader and their intensity diminish.At the same time,it is found that the X-ray diffraction peaks of chromium have a tendency to move toward smaller angle.When ball-milling time reaches 100 hours,the amorphous character of mixing powder is revealed with stable particle size.

Lead zirconate titanate (PZT) thin films are prepared on the substrates of monocrystal Si,PLT/Si,PT/Si/and proton-exchanged(PE)LiNbO3 by sol-gel process.Interface diffusion and the effect of Pb content on the films crystallization were investigated.In all cases,excess Pb(CH3COO)2 was added to avoid the formation of pb-deficient pyrochlore.