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qiang zhi leng que dui da xing zhu gang jian zu zhi yu xing neng de ying xiang
Author(s): 
Pages: 71-78
Year: Issue:  4
Journal: Materials Science and Technology

Keyword:  强制冷却大型铸钢件组织与机械性能魏氏组织;
Abstract: 采用模拟装置铸造了φ70×300毫米的砂型试样和强制冷却试样。利用电子计算机进行数值模拟,计算出两类试样在凝固过程中的温度梯度 G、凝固速度 R 以及 G/R 的比值,强制冷却使大型铸钢件的细晶区扩大,柱状晶区向内转动,粗大等轴晶区减少。与传统观念相反,发现适宜的强制冷却可以使魏氏组织具有很高的冲击韧性。
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