ISSN:
1662-9779
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Physics
Notes:
To enhance the comprehension on the internal rule of microstructure evolvement andquality-controlled relativity, the microstructure during the induction reheating of billets and diecasting of parts was systematically investigated. According to general structure observation and aidedanalysis of some computer simulations, the quantitative relationships between microscopicmorphology (including solid fraction and grain shape) and formation state was minutely discussed.The experimental results showed that liquid and solid phase in semi-solid slurry had different fillingtendency, fluid velocity of liquid phase in the area of high filling speed was relative quick and easy toflow into far area and corner. Solid particles far from gate possessed fine and round grain. Moreover,the structure configuration of original billets markedly affected forming process; billets with fine andround grain were required for the die-castings of complex shape and thin thickness. In the case of thebig change in shape and thickness of die-castings, the design of gating system and the control ofplunger speed should be so properly carried out as to avoid unequal distribution of solid and liquidphase in die-casting part as soon as possible
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/24/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.141-143.139.pdf
