董加胜, 楼琅洪, 张匀, et al. Effect of Recycled Smelting Number of Times on Chemical Composition, Structure and Mechanical Properties of Recycled Alloy M17[J]. Special Steel, 2008, 29(3): 27-29.
董加胜, 楼琅洪, 张匀, et al. Effect of Recycled Smelting Number of Times on Chemical Composition, Structure and Mechanical Properties of Recycled Alloy M17[J]. Special Steel, 2008, 29(3): 27-29.DOI:
Test results showed that for smelting of recycled casting superalloy M17(0. 16C
8.79Cr
5.79Al
4.93Ti
3.29Mo
15.20Co
0.78V
0.015B
0.073Zr
0.002S
0.001P
0.00110
0.0010N)by a 25 kg vacuum in- duction funace
with increasing repeated smelting number of times
the Si content in alloy increased slightly
while the change of main elements in alloy and deleterious element S
P and H was not appreciable
and the O and N content tended to increase; and the morphology of primary carbides in alloy changed from Chinese script-type in fresh alloy to blocky type in recycled alloy
the inheritance of primary carbides interrupted the back feeding shrinkage passage during alloy solidifica- tion to increase the tendency of porosity formation and significantly decrease the plasticity of alloy at clevated temperature.