G.G.Cheng
,
M.L.Wang
,
X.E.Yang
,
Y.L.Li
,
Y.G.Wang
,
L.Y.Wang
,
P.Zhao
金属学报(英文版)
Precipitation condition and nucleation of Ti2 03 during solidification of clean steel have been studied. The behavior of Ti2 03 during solidification as well as possibility of using Ti203 to refine as-cast grains as heterogeneous nucleation sites is discussed. It is shown that Ti2 03 can be formed provided that the steelmaking and solidification process is controlled strictly. And inoculating clean steel with Ti203 is an effective way to refine as-cast grains.
关键词:
clean steel
,
null
,
null
C.Y.Zhang
,
Y.P.Wang
,
Z.M.Yang
,
B.J.Ding
,
Y.L.Li
金属学报(英文版)
CuCr25 alloys containing different Ni content were prepared by vacuum induction melting(VIM)l.The microstructure and proerties were tested.The results show that with the increase of Ni content in CuCr25 alloys,the Cr phase changed from developed dendrite into nodular grains and was drastically refined;the electrical con-ductivity significantly decrease,but still reach the level of convenlional CuCr50 when the Ni content is below 0.5The Ni content had little influence on their breakdown strength.The first breakdown sites transferred to the boundoary of Cu and Cr phase for CuCr25Ni compared to the Cr phase for CuCr25 without Ni.
关键词:
CuCr25
,
null
,
null
