Y. L. Zhang1) and G. Spinks2) 1) Departmentof Mechanical Engineering
,
Ngee Ann Polytechnic
,
535 Clementi Road
,
Singapore5994892) Intelligent Polymer Research Institute
,
University of Wollongong
,
Northfields Ave
,
Wollongong
,
NSW
,
Australia
,
2522
金属学报(英文版)
Arolled mild steel wascoated byconductive polymers( polyaniline/ MMPand polyaniline/HCSA) andthenim mersedin hot water(50 ℃) fordifferenttimesforstudytheadhesion ofcoatings.It wasfound thatthe adhesion tendsto decrease over time. Thestudyshown that onebrittle and porous Fe3 O4 layer formed between conductive polymercoating and steelsub stratein a moistenvironmentand, asa result, decreased thecoating adhesions.
关键词:
conductive polymercoating
,
null
,
null
J.Wang School of Mechanical
,
Manufacturing and Medical Engineering
,
Queensland University of Technology
,
GPO Box 2434
,
Brisbane
,
Qld. 4001
,
Australia
金属学报(英文版)
An experimental investigation is outlined for the CO 2 laser cutting process of metallic coated sheet steels, GALVABOND. It shows that by proper control of the cutting parameters, good quality cuts are possible at high cutting rate. Visual examination indicates that when increasing the cutting rate to as high as 5000 mm/min (about 100 times that suggested previously), kerfs of better quality can be achieved. Some kerf characteristics such as the width, heat affected zone and dross in terms of the process parameters are also discussed. A statistical analysis has arrived at a recommendatio on the optimum cutting parameters forprocessing GALVABOND.
关键词:
laser cutting
,
null
,
null
Dauter Oliveira
,
WU Sheng-li
,
DAI Yu-ming
,
XU Jian
,
CHEN Hong
钢铁研究学报(英文版)
In order to obtain good sintering performance, it is important to understand sintering properties of iron ores. Sintering properties including chemical composition, granulation and high-temperature behaviors of ores from China, Brazil and Australia. Furthermore, several indices were defined to evaluate sintering properties of iron ores. The results show that: for chemical composition, Brazilian ores present high TFe, low SiO2, and low Al2O3 content. For granulation, particle diameter ratio of Brazilian ores are high; particle intermediate fraction of Chinese concentrates are low; and average particle size and clay type index of Australian ores are high. For high-temperature properties, ores from China, Brazil and Australia present different characteristics. Ores from different origins should be mixed together to obtain good high-temperature properties. According to the analysis of each ore′s sintering properties, an ore blending scheme (Chinese concentrates 20%+Brazilian ores 40%+Australian ores 40%) was suggested. Moreover, sinter pot test using blending mix was performed, and the results indicated that the ore blending scheme led to good sintering performance and sinter quality.
关键词:
sintering
,
iron ore
,
sintering property indices
,
ore blending scheme
