(中國(guó)科學(xué)院 金屬研究所， 沈陽(yáng) 110015)
摘 要: 以商品化軟件PROCAST為基礎(chǔ)進(jìn)行二次開發(fā)，對(duì)A356鋁合金托盤件凝固過(guò)程顯微疏松缺陷和二次臂距(SDAS)進(jìn)行了數(shù)值分析，建立了有氫氣析出量影響在內(nèi)的顯微疏松判據(jù)模型，預(yù)測(cè)了顯微疏松出現(xiàn)的位置與體積分?jǐn)?shù)。預(yù)測(cè)結(jié)果得到了X射線無(wú)損探傷實(shí)驗(yàn)的驗(yàn)證。開發(fā)了溫度場(chǎng)測(cè)試系統(tǒng)，測(cè)試了鑄件凝固過(guò)程的冷卻曲線，模擬結(jié)果與實(shí)際結(jié)果符合良好。
關(guān)鍵字: 顯微疏松； 二次臂距； 凝固模擬
secondary dendritic arm spacing in A356 alloys
（Institute of Metal Research, Chinese Academy of Sciences,
Shenyang 110015, P.R.China）
Abstract:Based on commercial software of PROCAST, the micro-porosity and SDAS of A356 plate casting were analyzed numerically during solidification process. The module for predicting the location and the percentage of micro-porosity was developed. In the module, a critical function which considers the effect of the hydrogen content is adopted. The simulated result of micro-porosity -agrees-well with the X-ray non-destruction test. The temperature measuring system is developed, and the measured cooling curves in different positions of the plate casting also match well with the simulated.
Key words: micro-porosity; SDAS; solidification simulation
