發(fā)布時(shí)間：2018-05-03 02:41

  本文選題：ZL鋁合金 + 半固態(tài)　； 參考：《中國有色金屬學(xué)報(bào)》2015年01期

【摘要】：采用自制變頻控制的電磁攪拌裝置制備半固態(tài)ZL203鋁合金漿料,分析不同攪拌時(shí)間和攪拌頻率下初生α相的形貌和尺寸,研究在連續(xù)攪拌過程中變換頻率對(duì)合金熔體進(jìn)行分級(jí)攪拌的影響。結(jié)果表明:分級(jí)攪拌可以有效地改善半固態(tài)合金漿料的質(zhì)量;適合于半固態(tài)ZL203合金的分級(jí)電磁攪拌工藝如下:ZL203合金經(jīng)670℃澆注后,先在40 Hz的頻率下攪拌5 s,再在30 Hz的頻率下攪拌10 s,并于620℃溫度下保溫5 min。經(jīng)此工藝制備的半固態(tài)ZL203合金鑄錠具有較好質(zhì)量:其中心部區(qū)域晶粒平均等積圓直徑為85.62μm,平均形狀因子為0.86;邊緣區(qū)域晶粒的平均等積圓直徑為84.52μm,平均形狀因子達(dá)到0.85。
[Abstract]:Semi-solid ZL203 aluminum alloy slurry was prepared by a self-made electromagnetic stirring device controlled by frequency conversion. The morphology and size of the primary 偽 phase at different stirring time and frequency were analyzed. The effect of frequency conversion on the graded stirring of alloy melt during continuous stirring was studied. The results show that graded stirring can effectively improve the quality of semi-solid alloy slurry, and the graded electromagnetic stirring process suitable for semi-solid ZL203 alloy is as follows: 1. ZL203 alloy is casted at 670 鈩，

本文編號(hào)：1836640