ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Based on the two-stage forming technology, the casting AZ31 Magnesium alloy bar wasforged into cylindrical straight inner gear between the temperature 250℃-400℃. At 250℃, the teethof the inner gear are almost formed. But there are some cyclic cracks on the surface of the sample.When improving the temperature above 300℃, the surface quality of the sample has greatlyimproved. According to the result of this experiment, the best temperature range for forging AZ31magnesium gear is 280℃ to 380℃.The forming load gradually reduced with the temperatureimproved. At 250℃, the forming load is 93t. At the 400℃, the forming load reduces to 80t.The initialgrain size of AZ31 magnesium alloy bar is 22μm. The microstructure evolution during the warmdeformation was observed by optical microscopy (OM). It is demonstrated that the grain refinementhappened during the deformation process
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/14/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.532-533.13.pdf
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