The effect of solidification rate on eutectic microstructure of high chromium cast iron 凝固速度對高鉻鑄鐵共晶組織的影響
L4in this eutectic composite . the volume fraction of tac could be changed with increasing solidification rate 隨著凝固速率的增大, '相的尺寸越來越小,其形狀也越來越圓。
The former followed linearity rule and the latter followed the rule of r - 0 . 5 the volume fraction was steadiness when the solidification rate increased 隨凝固速率的增加tasi _ 2纖維體積分?jǐn)?shù)基本不變。
Following the increase of the solidification rate , the y ? phase gets smaller and smaller , and the morphology of y ? phase becomes more circular . the inter - rod spacing of tac obeys relationship with x13 . 18r04972 , and the transverse area of tac versus solidification rate is s = ? . 6597r + 5 在該共晶自生復(fù)合材料中tac纖維間距和凝固速率的函數(shù)關(guān)系為,橫向面積與凝固速率的函數(shù)關(guān)系為s = - 0 . 6597r 5 . 14 , tac纖維體積分?jǐn)?shù)在一定范圍內(nèi)隨凝固速率變化。
It was found that the interface morphology of ni , cr , al - tac eutectic in - situ composite evolved from plan to cell and then to dendrite with the increase of solidification rate , if the gradient retained constant . in the same time , the eutectic microstructure also evolved from rod to cell and then to dendrite 本工作發(fā)現(xiàn),在溫度梯度基本保持不變的條件下,隨著凝固速率的增大, ni , cr , al - tac共晶自生復(fù)合材料的凝固界面由平界面向胞狀及枝狀界面逐漸轉(zhuǎn)化。