Based on GZT low-voltage switchgear assemblies CCC accreditation data, via analysis and comparison, it shows that 4 000 A/5 000 A non-conventional type level busbar system saves 30% copper material than rectangular level busbar system.
The analysis showed that,the main water guality indexes of second class urban sewage after being deeply treated with lime could satisfy the quality requirements of make-up water of circu-lating cooling water:in the condition of2.0～2.5times concentration,the corrosion rate of copper material in the circulating cooling water system was less than0.005mm/year,adhesion rate was less than10mg/cm 2 in30days;
The paper introduces the main specifications, together with the configuration of equipment and advanced technology adopted of 160mm/550mm×600mm four high hydraulic finishing mill unit in Guangzhou Copper Product factory.
The horizontal continuous casting is developed to cope with the alloy production of poor hot rolling performance, in which Qsn6.5-0.1 alloy production is universal but difficult in mastering its process. The article aims to study and discuss the production process for Qsn6.5-0.1 alloy produced in Guangzhou copper product corp. Ltd.
With the development of electronic parts and components industry and ever increasing requirement for the performance of materials,successive replacement of common copper product by oxygen free copper and silfos will be the trend of development in the near future.
Abstract : This paper studies systematically the subject of development strategy of deeply processed property of copper products in Tongling city, according to relatively basic theories such as Industrial Economics, Regional Economics and Technological Economics, by applying a combination of four methods, namely positive analysis, normative analysis, quantitative analysis and qualitative analysis, and following the basic way of "Putting forward a problem-Analysing the problem-Solving the problem".
The normal derivatives necessary for implementation of the Green's function in boundary integral equations are provided, and an example calculation of the Green's function in a quartz-copper material system is presented.
Establishment of a cutting force model and study of the stress-strain distribution in nano-scale copper material orthogonal cutt
Indeed, Aes Rude resemble ordinary copper material, but microchemical results indicate that they are constituted by highly ferruginous leaded copper, making them useless for producing other metal objects by means of casting or hot and cold working.
Step edges serve as sources for the consumption of copper material upon compound formation leading to accelerated copper dissolution at the step edges.
The results demonstrate the ageing kinetics of the spray-deposited and hot-extruded metal-matrix composites to be the same as those of the monolithic aluminium-copper material.
A procedure is outlined for the separation and determination ofμg amounts of silver from gram amounts of commercial copper products in nitric acid by the chloroform extraction of the 4-heptanone oxime complex of silver(I) nitrate.
This work gives the results of influence of temperature and deformation degree on changes in the metal grain growth of drawn copper products, because this mutual dependence was observed.
It is found that the latter two factors had pronounced effects on the obtained copper products.
Alloyed copper products accounted for about 84% of the total copper recovered from scrap.
Alloyed copper products accounted for about 83% of the total copper recovered from scrap.