叶经政
,
陈湘茹
,
仲红刚
,
翟启杰
上海金属
研究了30Cr2Ni4MoV钢在不同冷却速率下的凝固组织,测量统计了其二次枝晶臂间距,并回归拟合得到二次枝晶间距与冷却速率的关系λ2=334.9V-0.34.据此,可以根据二次枝晶臂间距推算大型铸锭中不同部位的冷却速率,有利于认识和控制大型铸件的凝固过程.
关键词:
低压转子钢
,
30Cr2Ni4MoV
,
凝固组织
,
冷却速率
Zhiliang NING
,
P.CAO
,
H.WANG
,
Jianfei SUN
,
Diankun LIU
材料科学技术（英文）
The grain size of AZ91 alloy was investigated in terms of the effects of cooling rate, superheat and steel gauze. It was found that rapid cooling rate and low superheat favoured the achievement of fine grain structures. The gauze had a less profound effect on the grain size in AZ91 magnesium alloy than that in A356 aluminum alloy. The mechanisms by which these factors affect grain refinement of AZ91 have also been discussed.
关键词:
Superheat
,
null
,
null
,
null
