本文選題：冷卻速度　切入點(diǎn)：晶粒尺寸　出處：《鑄造》2017年03期 　論文類型：期刊論文

【摘要】：采用溫度采集儀測定砂型(含20 mm厚的冷鐵和10 mm厚的冷鐵)、金屬型(銅模和鋼模)在鎂合金凝固階段的平均冷卻速率,分析了冷卻速度對ZM5鎂合金鑄態(tài)組織、相組成和力學(xué)性能的影響,以獲得鑄錠晶粒尺寸、抗拉強(qiáng)度、硬度與凝固冷卻速度之間的影響關(guān)系。研究結(jié)果表明,在砂型Ⅲ區(qū)(含10 mm厚的冷鐵)條件下,其冷卻速度最慢,為2.94℃/s;在金屬型銅模鑄造條件下,其冷卻速度最快,為7.88℃/s。ZM5鎂合金其微觀組織主要是α-Mg和第二相Mg_(17)Al_(12)。隨著冷卻速度的不斷提高,鎂合金晶粒明顯細(xì)化,第二相分布更加彌散、均勻,合金的硬度、抗拉強(qiáng)度和伸長率也明顯提高。
[Abstract]:The average cooling rate of sand mould (containing 20 mm thick cold iron and 10 mm thick cold iron) and metal (copper mould and steel die) during solidification stage of magnesium alloy was measured by temperature collector. The effect of cooling rate on the as-cast microstructure of ZM5 magnesium alloy was analyzed. The effects of phase composition and mechanical properties on the effect of grain size, tensile strength, hardness and solidification cooling rate on the ingot were obtained. The results show that the cooling rate is the slowest under the condition of sand mold 鈪，

本文編號：1651435